Mercurial > hg > aboriginal
annotate www/FAQ.html @ 1487:7ab15346cbf6
Document target /usr/sbin/record-commands wrapper.
| author | Rob Landley <rob@landley.net> |
|---|---|
| date | Wed, 11 Jan 2012 05:59:31 -0600 |
| parents | 38e80b18fe8b |
| children | c3b91b70cc42 |
| rev | line source |
|---|---|
| 889 | 1 <html> |
| 2 <!--#include file="header.html" --> | |
| 3 <title>Frequently Asked Questions</title> | |
| 4 | |
| 5 <ul> | |
| 6 <li><p><a href=#where_start>Q: Where do I start?</a></p></li> | |
| 7 | |
| 1234 | 8 <li><p><a href=#building><h1>Building System Images</h1></a></p></li> |
| 9 <ul> | |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
10 <li><p><a href=#source_tour>Q: What's all this source code for?</a></p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
11 |
|
1030
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
12 <li><p><a href=#add_package>Q: How do I add $PACKAGE to my system image's root filesystem?</a></p></li> |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
13 |
| 889 | 14 <li><p><a href=#case_sensitive_patch>Q: I added my uClibc patch to sources/patches but it didn't do anything, what's wrong?</a></p></li> |
|
896
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
15 |
|
1030
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
16 <li><p><a href=#package_breaks>Q: Why did package build $NAME die because it couldn't find $PREREQUISITE, even though it's installed?</a></p></li> |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
17 |
|
1225
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
18 <li><p><a href=#environment_sanitizing>Q: Why isn't the build listening to the environment variables I set?</p></li> |
| 1234 | 19 </ul> |
|
1225
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
20 |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
21 <li><p><a href=#debugging><h1>Debugging questions</h1></a></p></li> |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
22 |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
23 <ul> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
24 <li><p><a href=#debug_logging>Q: How do I get better log output?</p></li> |
| 1234 | 25 <li><p><a href=#debug_test>Q: How do I run my own build snippets without editing the build scripts?</a></p></li> |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
26 <li><p><a href=#debug_source>Q: How do I play around with package source code?</p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
27 <ul> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
28 <li><p><a href=#debug_package_cache>Q: What's the package cache for?</a></p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
29 <li><p><a href=#debug_working_copies>Q: What are working copies for?</a></p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
30 </ul> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
31 </ul> |
| 1234 | 32 |
|
1370
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
33 <li><p><a href=#development><h1>Development questions</h1></a></p></li> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
34 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
35 <ul> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
36 <li><p><a href=#dev_miniconfig>Q: What's a miniconfig?</a></p></li> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
37 </ul> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
38 |
| 1234 | 39 <li><p><a href=#other><h1>Other questions</h1></a></p></li> |
| 40 | |
| 41 <ul> | |
| 42 <li><p><a href=#name_change>Q: Didn't this used to be called Firmware Linux?</a></p></li> | |
| 43 | |
| 44 <li><p><a href=#ubuntu_mispackaged_qemu>Q: ./run-emulator.sh says qemu-system-mips isn't found, but I installed qemu. Why isn't this working?</a></p></li> | |
| 45 | |
| 46 <li><p><a href=#windows>Q: Do you care about windows?</a></p></li> | |
|
1321
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
47 |
|
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
48 <li><p><a href=#impactlinux>Q: What happened to impactlinux.com?</a></p></li> |
| 1397 | 49 <li><p><a href=#android>Q: What if I want to play with android?</a></p></li> |
|
1460
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
50 <li><p><a href=#new_syscalls>Q: Why don't your prebuilt binaries |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
51 work in my ancient system?</a></p></li> |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
52 |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
53 |
| 1234 | 54 </ul> |
| 889 | 55 </ul> |
| 56 | |
| 1234 | 57 <hr /><a name=where_start /><h2>Q: Where do I start?</h2> |
| 889 | 58 |
| 59 <p>The project provides development and test environments for lots of different | |
| 60 hardware platforms, based on busybox and uClibc and configured to run under | |
| 61 QEMU.</p> | |
| 62 | |
| 63 <p>Most people want to do one of three things:</p> | |
| 64 | |
| 65 <li><p>Download a prebuilt system image, boot it up under the emulator, and | |
| 66 compile stuff natively for a target.</p> | |
| 67 | |
|
901
777af6561b2c
Fix FAQ links pointed out by by wangji.
Rob Landley <rob@landley.net>
parents:
896
diff
changeset
|
68 <p>Go <a href=screenshots>here</a> and download the appropriate |
| 889 | 69 system-image-<b>$ARCH</b>.tar.bz2 for your $TARGET, extract it, cd into it, |
| 70 and <b>./run-emulator.sh</b> to boot it under qemu.</p> | |
| 71 | |
| 72 <p>Alternately, you can run the script <b>./development-environment.sh</b>, | |
| 73 which is a wrapper around run-emulator.sh that feeds QEMU extra options to add | |
| 74 memory (256 megs) and writeable disk space (a blank 2 gigabyte disk image | |
| 75 mounted on /home) to provide a more capable development environment.</p> | |
| 76 | |
| 77 <p>The system images contain native compiler toolchains, but if you install | |
| 78 distccd on the host and add the appropriate cross compiler to your host's | |
| 79 $PATH, the ./run-emulator.sh script will detect this and set up the system | |
| 80 image to automatically use distcc to call out to the cross compiler through | |
| 81 the virtual network, speeding up native builds significantly.<p> | |
| 82 </li> | |
| 83 | |
|
1050
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
84 <li><p>Build your own cross compilers and system images from source, using |
| 889 | 85 the build scripts.</p> |
| 86 | |
|
1050
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
87 <p>Go to the <a href=downloads>downloads directory</a>, grab the most recent |
|
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
88 release tarball, extract it, and run <b>./build.sh</b> to list |
| 889 | 89 the available targets. The run <b>./build.sh $TARGET</b> to compile |
|
1030
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
90 the one you like. The results wind up in the "build" directory.</p> |
| 889 | 91 |
| 92 <p>The build scripts are written in bash, and fairly extensively commented. | |
| 93 All the scripts at the top level are designed to be run directly, and | |
| 94 build.sh is just a wrapper script that calls them in order. The less commonly | |
| 95 used scripts in <b>sources/more</b> are also designed to be run directly.</p> | |
| 96 | |
|
1030
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
97 <p>A large number of variables can be set to configure the build, either |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
98 by modifying the file "config" (which documents them all) or by exporting |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
99 them as environment variables.</p> |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
100 |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
101 <p>To grab the latest development version of the build scripts out of the |
|
1050
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
102 source control system, go to the |
|
1321
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
103 <a href=/hg/aboriginal>mercurial archive</a>. |
|
1030
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
104 If you don't want to install mercurial, you can grab a |
|
1321
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
105 <a href=/hg/aboriginal/archive/tip.tar.bz2>tarball</a> of the current code at |
|
1030
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
106 any time.</p> |
| 889 | 107 </li> |
| 108 | |
|
1050
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
109 <li><p>Download a prebuilt cross compiler and cross-compile stuff with it.</p> |
|
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
110 |
|
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
111 <p>Go <a href=screenshots>here</a> and download the appropriate |
| 1234 | 112 cross-compiler-$TARGET.tar.bz2 for your $TARGET, extract it, add its |
|
1050
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
113 "bin" directory to your $PATH, and use the appropriate $TARGET-cc and |
|
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
114 $TARGET-ld and so on to compile your program. (The tool names have prefixes |
|
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
115 so they can be in the same $PATH as your host's existing compiler.)</p> |
|
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
116 </li> |
|
333c8f799302
Update lots and lots of web pages for the project name change to Aboriginal Linux.
Rob Landley <rob@landley.net>
parents:
1030
diff
changeset
|
117 |
| 889 | 118 <p>If all else fails, look at the pretty |
|
901
777af6561b2c
Fix FAQ links pointed out by by wangji.
Rob Landley <rob@landley.net>
parents:
896
diff
changeset
|
119 <a href=screenshots>screenshots</a>.</p> |
| 889 | 120 |
| 1234 | 121 <hr /><a name=building /> |
| 122 <h1>Building System Images</h1> | |
| 123 | |
| 124 <p>The build scripts compile the system images from source code. Along | |
| 125 the way, they create the cross compilers and root filesystem tarballs too. | |
| 126 If you just want to use the prebuilt binary tarballs to mess around with | |
| 127 native environments for various targets, you don't need to care about the | |
| 128 build scripts.</p> | |
| 129 | |
| 130 <p>But if you want to understand how it all works, and how to reproduce it, | |
| 131 then you do.</p> | |
| 132 | |
| 133 <p>Start by running (or reading) "build.sh", it calls everything else.</p> | |
| 134 | |
| 135 <hr /><a name=source_tour /><h2>Q: What's all this source code for?</h2> | |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
136 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
137 <p>A: The basic outline is:</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
138 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
139 <ul> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
140 <li><p><b>Top level</b> - The build stages. The file build.sh calls the rest of these scripts in order (but you can call 'em directly too), and the file config lists all the envirionment variables you can set to change the default behavior.</p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
141 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
142 <li><p><b>sources</b> - Infrastructure files which you don't call directly.</p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
143 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
144 <li><p><b>more</b> - Additional scripts you can call directly to do various things, but which aren't build stages. They have comments near the top describing what they do.</p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
145 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
146 <li><p><b>build</b> - Directory generated output goes into. All the output of running a build winds up in here, and "rm -rf build" is essentially "make clean".</p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
147 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
148 <li><p><b>packages</b> - Downloaded source packages. If you "rm -rf packages", |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
149 the script download.sh re-populates it by calling wget on various URLs.</p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
150 </ul> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
151 |
| 1234 | 152 <hr /><a name=add_package /><h2>Q: How do I add $PACKAGE to my system image's root filesystem?</h2> |
|
1119
25b47a72fd70
Update the FAQ with some reasons for the name change.
Rob Landley <rob@landley.net>
parents:
1050
diff
changeset
|
153 |
|
1351
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
154 <p>A: Either use setup-chroot to copy the root filesystem into a writeable |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
155 chroot, or run the build scripts with SYSIMAGE_TYPE=ext2 (and probably |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
156 HDA_MEGS=2048) to create a writeable ext2 system image instead of the default |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
157 read-only squashfs.</p> |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
158 |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
159 <p>The setup-chroot command is a shell script in each system image's /sbin |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
160 directory which copies the squashfs contents into a writeable chroot |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
161 directory, and chroots into that directory. Since dev-environment.sh |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
162 creates a 2 gigabyte ext3 image and mounts it on /home, you should have |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
163 plenty of space under there to do:</p> |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
164 |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
165 <blockquote><pre> |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
166 setup-chroot /home/work /bin/ash |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
167 </pre></blockquote> |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
168 |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
169 <p>The first time you run this (I.E. when the directory you want to chroot into |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
170 doesn't exist), setup-chroot copies the root filesystem into it.</p> |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
171 |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
172 <p>Afterwards, setup-chroot uses "mount --bind" to copy the host filesystem's |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
173 mounts (/proc, /sys, /tmp, and so on), then chroots into the new directory |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
174 to run your command. When the chroot exits, setup-chroot calls "zapchroot" |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
175 to unmount all those sub-mounts.</p> |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
176 |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
177 <p>If you don't specify which command to run, chroot runs /bin/sh, which by |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
178 default points to bash 2.04b built without ncurses. This is good for running |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
179 scripts but is not the world's friendliest interactive shell.</p> |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
180 |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
181 <p>The other thing you could do is go back to the build scripts and |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
182 build a writeable system image by specifying the environment variable |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
183 "SYSIMAGE_TYPE=ext2" instead of the default squashfs. You may also want |
|
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
184 to set "SYSIMAGE_HDA_MEGS=2048".</p> |
|
1119
25b47a72fd70
Update the FAQ with some reasons for the name change.
Rob Landley <rob@landley.net>
parents:
1050
diff
changeset
|
185 |
| 1234 | 186 <p>Aboriginal Linux builds squashfs images by default, and the prebuilt binary |
| 187 tarballs in | |
|
1030
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
188 the downloads/binaries directory are built with the default values. Squashfs |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
189 is a read-only compressed filesystem, which means it's pretty durable (you |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
190 never need to fsck it), but also a bit limiting. The dev-environment.sh |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
191 script attaches a 2 gigabyte ext2 image to /dev/hdb (which is mounted on |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
192 /home) so you always have writeable space to build stuff in, but that doesn't |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
193 let you modify the root filesystem on /dev/hda: you can't install packages |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
194 you build into /bin and such on a read-only root filesystem.</p> |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
195 |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
196 <p>The "SYSIMAGE_TYPE" and "SYSIMAGE_HDA_MEGS" config entries let you change |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
197 the default system image type generated by the system-image.sh script. You |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
198 can edit the file "config" or specify them as environment variables, ala:</p> |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
199 |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
200 <blockquote><pre> |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
201 SYSIMAGE_TYPE=ext2 SYSIMAGE_HDA_MEGS=2048 ./build.sh $TARGET |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
202 </pre></blockquote> |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
203 |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
204 <p>That creates a 2 gigabyte ext2 image, which you can boot into and install |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
205 packages natively under, using the "./run-from-build.sh $TARGET" script. |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
206 If you've already built a system image, you can repackage the existing root |
|
1351
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
207 filesystem by re-running system-image.sh (instead of the whole build.sh). |
|
1030
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
208 As always, your new system image is created in the "build" subdirectory.</p> |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
209 |
|
81003c9f31cb
Add a new FAQ: how to get a writeable root filesystem.
Rob Landley <rob@landley.net>
parents:
901
diff
changeset
|
210 <p>Note: since this is a writeable image, you'll have to fsck it. You can |
|
1351
c41de203f9b8
Update FAQ now that setup-chroot is in the system images.
Rob Landley <rob@landley.net>
parents:
1321
diff
changeset
|
211 use "tune2fs -j" to turn it into an ext3 image to reduce the need for this.</p> |
| 889 | 212 |
| 1234 | 213 <hr /><a name=case_sensitive_patch /><h2>Q: I added a uClibc patch to sources/patches but it didn't do anything, what's wrong?</h2> |
| 889 | 214 |
| 215 <p>The Linux filesystem is case sensitive, so the patch has to start with | |
| 216 "uClibc-" with a capital C.</p> | |
| 217 | |
| 1234 | 218 <hr /><a name=package_breaks /><h2>Q: Why did the $NAME package build die |
|
896
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
219 with a complaint that it couldn't find $PREREQUISITE, even though that's |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
220 installed on the host? (For example, distcc and python.)</h2> |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
221 |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
222 <p>Because you skipped the host-tools.sh step, and because installing a package |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
223 on the host isn't the same as installing it on the target.</p> |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
224 |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
225 <p>Even though host-tools.sh is technically an optional step, your host has to |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
226 be carefully set up to work without it.</p> |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
227 |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
228 <p>Not only does host-tools.sh add prerequisite packages your build requires, |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
229 it _removes_ everything else from the $PATH that might change the behavior of |
|
896
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
230 the build. Without this, the ./configure stages of various packages will |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
231 detect that libtool exists, or that the host has Python or Perl installed, |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
232 and configure the packages to make use of things that the cross compiler's |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
233 headers and libraries don't have, and that the target root filesystem |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
234 may not have installed.</p> |
|
edc150001472
New FAQ entry, comment updates.
Rob Landley <rob@landley.net>
parents:
889
diff
changeset
|
235 |
| 1234 | 236 <hr /><a name=environment_sanitizing /><h2>Q: Why isn't the build listening to the environment variables I set?</h2> |
|
1225
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
237 |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
238 <p>Quick answer: export NO_SANITIZE_ENVIRONMENT=1.</p> |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
239 |
|
1225
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
240 <p>Long answer: you probably deleted the commented out variables from "config" |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
241 and then tried to set them on the command line. The environment sanitizing |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
242 logic has a whitelist of variables, but also looks at config to see what |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
243 variables are exported in there (whether they're commented out or not) and |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
244 lets those through from the environment as well. If you remove them from |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
245 config, it won't let them through from the environment.</p> |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
246 |
| 1234 | 247 <hr /><a name="debugging" /><h1>Debugging questions</h1> |
|
1225
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
248 |
| 1234 | 249 <hr /><a name="debug_logging" /><h2>Q: How do I get better log output from the build?</h2> |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
250 |
|
1191
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
251 <h3><b>Get a verbose, single-processor log of the build output.</b></h3> |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
252 |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
253 <p>When something goes wrong, re-run your build with a couple extra variables, |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
254 and log the output with "tee":</p> |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
255 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
256 <blockquote><pre>BUILD_VERBOSE=1 CPUS=1 ./build.sh 2>&1 | tee out.txt</pre></blockquote> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
257 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
258 <p>The shell has a nice syntax for exporting variables just for a single |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
259 command, by putting the command to run after the assignment. Doing |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
260 that doesn't pollute your environment by leaving CPUS or BUILD_VERBOSE |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
261 exported, but it exports them just for the new "build.sh" process it |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
262 launches. And redirecting stderr to stdin and piping the result into "tee" |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
263 captures the output so you can examine it with less or vi.</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
264 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
265 <p>BUILD_VERBOSE undoes the "pretty printing" of the linux kernel and uClibc, |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
266 and makes a few other build steps produce more explicit output.</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
267 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
268 <p>CPUS controls the number of tasks make should run in parallel. The default |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
269 value is the number of processors on the system, times 1.5. (So a 4 processor |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
270 system runs 6 processes.) Making it single processor gives you much more |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
271 readable output, because a single-processor build stops more reliably at the |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
272 point where it hit a problem, rather than at some random later point forcing |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
273 you to scroll back quite a ways to find the error. It also shouldn't |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
274 interleave the output of multiple parallel commands.</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
275 |
|
1191
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
276 <h3><b>Use the command logging wrapper</b></h3> |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
277 |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
278 <p>If you need more logging detail, run more/record-commands.sh, then re-run |
|
1487
7ab15346cbf6
Document target /usr/sbin/record-commands wrapper.
Rob Landley <rob@landley.net>
parents:
1467
diff
changeset
|
279 the build and look at the output in build/logs. (A similar "record-commands" |
|
7ab15346cbf6
Document target /usr/sbin/record-commands wrapper.
Rob Landley <rob@landley.net>
parents:
1467
diff
changeset
|
280 wrapper is available in each system image's /usr/sbin directory, to |
|
7ab15346cbf6
Document target /usr/sbin/record-commands wrapper.
Rob Landley <rob@landley.net>
parents:
1467
diff
changeset
|
281 log the commands of native builds.)</p> |
|
1191
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
282 |
|
1487
7ab15346cbf6
Document target /usr/sbin/record-commands wrapper.
Rob Landley <rob@landley.net>
parents:
1467
diff
changeset
|
283 <p>more/record-commands.sh sets up a wrapper which logs every command (and |
|
1191
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
284 all its arguments) run out of $PATH. It populates build/wrapdir with |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
285 symlinks for every command name currently in $PATH, all pointing to the |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
286 "wrappy" binary (built from sources/toys/wrappy.c). If you run record-commands |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
287 before running host-tools.sh it wraps the host $PATH, if you run it after |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
288 host-tools.sh it wraps the sanitized $PATH in build/host.</p> |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
289 |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
290 <p>The wrappy binary depends on two environment variables (set up by |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
291 sources/include.sh): $WRAPPY_LOGPATH is an absolute path to the current |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
292 log file (updated by the "setupfor" function) and $OLDPATH is the $PATH to |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
293 exec the real command out of after appending the current command line to |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
294 the log.</p> |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
295 |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
296 <p>The script "more/report-recorded-commands.sh" prints out a list of all |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
297 commands used by each build stage. (Comparing the host-tools version |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
298 to a run without host-tools can be instructive; that's the extra stuff |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
299 ./configure is picking up out of the host environment.)</p> |
|
f66d99bb00f9
Write-up on the command logging wrapper.
Rob Landley <rob@landley.net>
parents:
1185
diff
changeset
|
300 |
|
1487
7ab15346cbf6
Document target /usr/sbin/record-commands wrapper.
Rob Landley <rob@landley.net>
parents:
1467
diff
changeset
|
301 <p>The record-commands wrapper is also available in the target root |
|
7ab15346cbf6
Document target /usr/sbin/record-commands wrapper.
Rob Landley <rob@landley.net>
parents:
1467
diff
changeset
|
302 filesystem's /usr/sbin directory. Run "record-commands /path/to/script" |
|
7ab15346cbf6
Document target /usr/sbin/record-commands wrapper.
Rob Landley <rob@landley.net>
parents:
1467
diff
changeset
|
303 and when it exits /tmp/record-commands-log.txt should list all the |
|
7ab15346cbf6
Document target /usr/sbin/record-commands wrapper.
Rob Landley <rob@landley.net>
parents:
1467
diff
changeset
|
304 command lines run by the script, in order.</p> |
| 1285 | 305 |
| 1234 | 306 <hr /><a name=debug_test /><h2>Q: How do I run my own build snippets without editing the build scripts?</p></h2> |
| 307 | |
| 308 <p>A: Use the more/test.sh script</p> | |
| 309 | |
|
1467
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
310 <p>This wrapper runs a command line in build context: the first argument |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
311 is the target to build for, and the rest of its arguments are a command line |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
312 to run as if building for that target.</p> |
| 1234 | 313 |
| 314 <p>Examples:</p> | |
| 315 <blockquote><pre> | |
|
1467
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
316 more/test.sh armv5l build_section busybox |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
317 more/test.sh mips getconfig linux |
| 1234 | 318 </pre></blockquote> |
| 319 | |
|
1467
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
320 <p>The wrapper imports sources/include.sh and calls load_target (with |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
321 NO_CLEANUP so it doesn't blank an existing output directory). This sets up |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
322 the same context for building for a given $ARCH that the build scripts use: |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
323 it adds the appropriate cross compiler to the $PATH (if it's already been |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
324 built), sets all the shell functions and environment variables, |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
325 creates the temporary directory, and so on. The wrapper then runs the rest of |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
326 the command line in the resulting context.</p> |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
327 |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
328 <p>By default, more/test.sh acts as its own build stage called "test" |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
329 (because include.sh uses the name of the script file you're running to set a |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
330 default STAGE_NAME), so output winds up in build/test-armv5l and such. You |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
331 can override this by setting STAGE_NAME yourself, for example:</p> |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
332 |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
333 <blockquote><pre> |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
334 # rebuild uClibc without redoing binutils/gcc/kernel headers stages: |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
335 STAGE_NAME=simple-cross-compiler more/test.sh sparc build_section uClibc |
|
38e80b18fe8b
Expand more/test.sh documentation with "rebuilding uClibc but not binutils/gcc" example.
Rob Landley <rob@landley.net>
parents:
1460
diff
changeset
|
336 </pre></blockquote> |
| 1234 | 337 |
| 338 <hr /><a name=debug_source /><h2>Q: How do I play around with package source code?</p></h2> | |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
339 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
340 <p>The source code used by package builds lives in several directories, each |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
341 with a different purpose:</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
342 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
343 <ul> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
344 <li><p><b>packages</b> - vanilla upstream source tarballs (populated by download.sh).</p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
345 <li><p><b>sources/patches</b> - local patches to apply to the vanilla packages.</li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
346 <li><p><b>build/packages</b> - the package cache, clean copies of the extracted and patched source.</p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
347 <li><p><b>build/temp-$ARCH</b> - working copies of the source configured and built for the given architecture.</p></li> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
348 </ul> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
349 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
350 <h3><b>Downloading</b></h3> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
351 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
352 <p>The list of source URLs is in the script download.sh, along with a list |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
353 of mirrors to check if the original URL isn't available. Those URLs are |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
354 the only place that specifies version numbers for packages, so if you want |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
355 to switch versions just point to a new URL and re-run download.sh. (You can |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
356 set SHA1= blank for the first download, and it will output the sha1sum for |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
357 the file it downloads. Cut and paste that into the download script and |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
358 re-run to confirm.)</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
359 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
360 <h3><b>Extracting and patching</b></h3> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
361 |
|
1225
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
362 <p>Each script to build a package calls the shell function "setupfor" |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
363 before building the package, and "cleanup" afterwards. Conceptually, |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
364 "setupfor" extracts a tarball (from the "packages" directory), |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
365 patches it if necessary (applying all the files in "sources/patches" that |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
366 start with that package's name, which come from the aboriginal linux |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
367 repository), and cd's into the resulting directory. The function "cleanup" |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
368 does an "rm -rf" on that directory when you're done.</p> |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
369 |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
370 <p>In practice, the infrastructure behind the scenes caches the extracted |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
371 tarballs. This optimization saves disk space, CPU time, and I/O bandwidth, |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
372 speeding up builds considerably (especially when you do a lot of them in |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
373 parallel). This optimization is designed to be easily ignored, but |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
374 understanding the infrastructure can be useful for debugging.</p> |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
375 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
376 <p>There are two places to look for extracted source packages: the package |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
377 cache and the working copy. The <b>package cache</b> (in "build/packages") |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
378 contains clean copies of all the previously extracted source tarballs, with |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
379 patches already applied. Each <b>working copy</b> (in an architecture's |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
380 temporary directory, "build/temp-$ARCH") is a tree of hardlinks to the |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
381 package cache that provides a directory in which to configure, build, and |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
382 install that package for a specific target.</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
383 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
384 <p>The source in the package cache stays clean, can be re-used across multiple |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
385 builds, and is only used to create working copies. Working copies fill up |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
386 with temporary files from configure/make/install, and are normally deleted |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
387 after each successful build. If you want to look at clean source, you |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
388 want the package cache. If you want to look at the state of a failed |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
389 build to see how it was configured or re-run portions of it, you want the |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
390 working copy.</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
391 |
| 1234 | 392 <hr /><a name=debug_package_cache /><h2>Q: What's the package cache for?</p></h2> |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
393 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
394 <p>The package cache contains clean architecture-independent source code, |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
395 which you can edit, use to run modified builds and create patches, and easily |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
396 revert to its original condition. The package cache avoids re-extracting the |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
397 same tarballs over and over, but also provides a place you can make temporary |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
398 modifications to that source behind the build system's back without having to |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
399 mess around with tarballs or patch files.</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
400 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
401 <p>The setupfor function calls "extract_package" to populate the package |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
402 cache. First extract_package checks for an existing copy of the appropriate |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
403 source directory, and when it doesn't find one it extracts the source tarballs |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
404 from the "packages" directory, applies the appropriate patches from |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
405 "sources/patches/$PACKAGENAME-*.patch", and saves the results into its own |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
406 directory (named after the package) under "build/packages". (USE_UNSTABLE |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
407 packages work the same way, but insert an "alt-" prefix on the package |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
408 name.)</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
409 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
410 <p>When the package cache has an existing copy of the package, extract_package |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
411 checks the list of sha1sums in that copy's "sha1-for-source.txt" file against |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
412 the sha1sums for the tarball and for each of the patch files it needs to apply. |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
413 If the list matches, it uses the existing copy. If it doesn't match, it |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
414 deletes the existing copy out of the package cache, re-extracts the tarball, |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
415 and reapplies each patch to it.</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
416 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
417 <p>This means if you can edit the copy under sources/patches all you like, |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
418 and as long as you don't modify sha1-for-source.txt, don't replace the |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
419 tarball, or add/remove/edit any of the patches to apply to it, it |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
420 will re-use that source for subsequent builds. So go ahead and fill it |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
421 full of printf()s and test code, then when you want to go back to a clean |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
422 copy, delete the build/packages directory (either one package or the whole |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
423 thing) and let setupfor recreate it.</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
424 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
425 <p>If you come up with changes you want to keep, you can create a patch from |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
426 the package cache this way:</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
427 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
428 <blockquote><pre> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
429 # Rename the modified package directory |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
430 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
431 cd $TOP |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
432 cd build/packages |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
433 mv $PACKAGE $PACKAGE.bak |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
434 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
435 # Extract a clean copy |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
436 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
437 cd $TOP |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
438 more/test.sh host extract_package $PACKAGE |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
439 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
440 # Diff the two and write out the patch to sources/patches |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
441 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
442 cd build/packages |
|
1460
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
443 diff -ruN $PACKAGE $PACKAGE.bak > \ |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
444 ../../sources/patches/$PACKAGE-$NAME.patch |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
445 rm -rf $PACKAGE |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
446 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
447 # Run a clean test build |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
448 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
449 cd $TOP |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
450 rm -rf build/packages/$PACKAGE |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
451 ./build.sh $ARCH |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
452 </pre></blockquote> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
453 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
454 <p>Where $TOP is your top level Aboriginal Linux directory, $PACKAGE is the |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
455 name of the package you're modifying, and $NAME is some unique name for your |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
456 patch. Don't forget to delete the $PACKAGE.bak directory to reclaim its disk |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
457 space when you're satisfied with your patch (or "rm -rf build/packages" to |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
458 zap the entire package cache, or just "rm -rf build" to clean |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
459 up all the temporary files).</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
460 |
|
1225
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
461 <p>If the environment variable EXTRACT_ALL is set, download.sh will |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
462 call extract_package on each package as soon as it confirms the tarball's |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
463 sha1sum. (The environment variable FORK makes each package download happen |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
464 in parallel, including the call to extract_package if any.) Prepopulating |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
465 the package cache this way is useful before running different architecture |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
466 builds in parallel, or when testing that new patches (added to the |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
467 sources/patches directory) apply correctly to the relevant package(s).</p> |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
468 |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
469 <p>This means you can do the following to get a freshly extracted and patched |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
470 clean copy of all packages:</p> |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
471 |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
472 <blockquote><pre> |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
473 rm -rf build/packages |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
474 EXTRACT_ALL=1 ./download.sh |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
475 </pre></blockquote> |
|
39fda120621c
Fluff out the debugging section of the FAQ a bit more, explaining EXTRACT_ALL and NO_SANITIZE_ENVIRONMENT.
Rob Landley <rob@landley.net>
parents:
1191
diff
changeset
|
476 |
| 1234 | 477 <hr /><a name=debug_working_copies /><h2>Q: What are working copies for?</p></h2> |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
478 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
479 <p>Working copies are target-specific copies of package source where builds |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
480 actually happen. The build scripts clone a fresh working copy for each build, |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
481 then run configure, make, and install commands in the new copy. They leave the |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
482 aftermath of failed builds lying around for analysis; to keep the working |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
483 copies of successful builds around too, set the NO_CLEANUP environment |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
484 variable. If you want to cd into a source directory and re-run bits of a |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
485 previous build, use the working copy of a package's source. (You'll probably |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
486 have to add the appropriate cross compiler's bin directory to your $PATH, but |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
487 otherwise it'll usually just work.)</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
488 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
489 <p>Working copies of source packages are cloned from the package cache |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
490 by the the function "setupfor", which first calls extract_package to ensure the |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
491 package cache is up to date, then creates a directory of hardlinks to the |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
492 package cache via "cp -l" (or symlinks via "cp -s" if $SNAPSHOT_SYMLINK is |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
493 set).</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
494 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
495 <p>The working copies use hardlinks to avoid creating redundant copies of the |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
496 file contents, which would waste I/O bandwidth and eat lots of disk space |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
497 and disk cache memory. Using hardlinks instead of symlinks for the working |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
498 copies also saves inodes and dentry cache, since each symlink consumes an |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
499 inode, but that optimization requires that the package cache and working |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
500 copies be on the same filesystem.</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
501 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
502 <p>Linking to the page cache instead of copying it doesn't cause problems |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
503 for most packages, because most methods of modifying files used by package |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
504 builds break hardlinks or symlinks by first creating a temporary copy with |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
505 the modifications, then deleting the original and moving the copy into its |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
506 place. Modifying files that are tracked by source control also creates |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
507 spurious noise for the package's developers. Occasionally a package will |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
508 make a mistake (such as zlib 1.2.5 shipping a Makefile which is |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
509 generated by configure, and modified in place), in which case the build |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
510 has to break the link itself. (Note that editing the working copies of |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
511 source files in build/temp-$ARCH can modify the cached copy if your editor |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
512 isn't configured to break hardlinks. Usually you edit the package cache |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
513 version and let setupfor create a new working copy.)</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
514 |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
515 <p>If you want to search just the generated files and not the snapshot of |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
516 the source, use "find $PACKAGE -links 1". If you want to search just |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
517 the source files and not the generated files, that's what the package |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
518 cache is for.</p> |
|
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
519 |
|
1370
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
520 <a name=development> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
521 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
522 <hr /><a name=dev_miniconfig /><h2>Q: What's a miniconfig?</h2> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
523 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
524 <p>Aboriginal Linux uses "miniconfig" format for Linux and uClibc config |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
525 files.</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
526 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
527 <p>A miniconfig is a list of interesting symbols to switch on. To create a |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
528 miniconfig, start with "allnoconfig", go into "menuconfig" to switch on all the |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
529 symbols you want, and add a "SYMBOLNAME=y" line for each symbol you had to |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
530 manually set. (You don't need to record symbols set by dependency |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
531 resolution, just the ones you'd have to set yourself to get from |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
532 allnoconfig to the config you want.)</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
533 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
534 <p>Since the vast majority of these symbols are common between platforms, we |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
535 split our miniconfigs for linux and uClibc into a "baseconfig" file |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
536 (in the sources directory) and a list of target-specific symbols in each |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
537 target's settings file. We append these two together to get our miniconfig.</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
538 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
539 <p>To use a miniconfig:</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
540 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
541 <blockquote><pre>make allnoconfig KCONFIG_ALLCONFIG=filename</pre></blockquote> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
542 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
543 <p>The sources/toys/miniconfig.sh script compresses a full .config into |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
544 a miniconfig. To use, "cp .config tempname; ARCH=x86 $PATHTO/miniconfig.sh |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
545 tempname" and the result winds up in mini.conf.</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
546 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
547 <p>The kernel's new defconfig format is similarly filtered to remove |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
548 uninteresting symbols, but miniconfig has several advantages over |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
549 savedefconfig:</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
550 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
551 <ul> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
552 <li><p>Miniconfig is human readable.</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
553 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
554 <p>Each miniconfig file is self-contained: it lists all the symbols we |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
555 explicitly care about enabling. The compressed defconfig files are offsets |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
556 against an external "default configuration" that changes from platform to |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
557 platform and from version to version.</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
558 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
559 <p>Miniconfig may rely on dependency resolution to |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
560 switch on whatever other symbols are necessary to make this configuration |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
561 work, but we don't have to care what those are. We list all the symbols |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
562 we care about, in one place, where we can easily see all the features enabled |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
563 by this configuration.</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
564 </li> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
565 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
566 <li><p>Miniconfig doesn't have to switch any symbols off.</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
567 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
568 <p>Lots of symbols default to y, and the compressed defconfig files have |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
569 to switch off symbols that are enabled by default but which this configuration |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
570 doesn't want. To do so it uses "magic comments". (The |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
571 config file format doesn't say "SYMBOL=n", it says "# SYMBOL is not set". |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
572 Despite most things starting with a # being comments, that one isn't.)</p></li> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
573 </li> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
574 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
575 <li><p>Miniconfig doesn't silently bloat over time</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
576 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
577 <p>In each new release, new symbols show up defaulting to "y". For example, |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
578 between linux 2.6.38 and 2.6.39 the symbol "CONFIG_SUSPEND=y" showed up on all |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
579 platforms, and i686 grew CONFIG_PNP_DEBUG_MESSAGES=y and seven different |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
580 CONFIG_ACPI_* symbols all defaulting to y. A compressed defconfig switches |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
581 all these on by default, because the delta against defconfig it records |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
582 doesn't switch them off.</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
583 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
584 <p>In miniconfig, you only get the features you requested.</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
585 </li> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
586 </ul> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
587 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
588 <p>The disadvantages of miniconfig are that miniconfig.sh is really slow, |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
589 and that if new required symbols show up you have to add them to the |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
590 miniconfig yourself.</p> |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
591 |
|
3bd113bd3722
Add a FAQ about miniconfigs.
Rob Landley <rob@landley.net>
parents:
1351
diff
changeset
|
592 <a name=other /> |
| 1234 | 593 <hr /><a name=name_change /><h2>Q: Didn't this used to be called Firmware Linux?</h2> |
| 594 | |
| 595 <p>A: Yup. The name changed shortly before the 1.0 release in 2010.</p> | |
| 596 | |
| 597 <p>The name "Aboriginal Linux" is based on a synonym for "native", as in | |
| 598 native compiling. It implies it's the first Linux on a new system, and also | |
| 599 that it can be replaced. It turns a system into something you can do | |
| 600 native development in, terraforming your environment so you can use it | |
| 601 to natively build your deployment environment (which may be something else | |
| 602 entirely).</p> | |
| 603 | |
| 604 <p>Aboriginal Linux is cross compiled, but after it boots you shouldn't need | |
| 605 to do any more cross compiling. (Except optionally using the cross compiler | |
| 606 as a native building accelerator via distcc.) Hence our motto, | |
| 607 "We cross compile so you don't have to".</p> | |
| 608 | |
| 609 <p>The old name didn't describe the project very well. (It also had tens | |
| 610 of millions of Google hits, most of which weren't this project.) If you're | |
| 611 really bored, there's a page on <a href=history.html>the history of the | |
| 612 project</a>.</p> | |
| 613 | |
| 614 <hr /><a name=ubuntu_mispackaged_qemu /><h2>Q: ./run-emulator.sh says qemu-system-$TARGET isn't found, but I installed the qemu package and the executable "qemu" is there. Why isn't this working?</h2> | |
| 615 | |
| 616 <p>A: You're using Ubuntu, aren't you? You need to install | |
| 617 "qemu-kvm-extras" to get the non-x86 targets.</p> | |
| 618 | |
| 619 <p>The Ubuntu developers have packaged qemu in an <strike>actively | |
| 620 misleading</strike> "interesting" way. They've confused the emulator QEMU | |
| 621 with the virtualizer KVM.</p> | |
| 622 | |
| 623 <p>QEMU is an emulator that supports multiple hardware | |
| 624 targets, translating the target code into host code a page at a time. KVM | |
| 625 stands for Kernel Virtualization Module, a kernel module which allows newer x86 | |
| 626 chips with support for the "VT" extension to run x86 code in a virtual | |
| 627 container.</p> | |
| 628 | |
| 629 <p>The KVM project started life as a fork of QEMU (replacing QEMU's CPU | |
| 630 emulation with a kernel module providing VT virtualization support, but | |
| 631 using QEMU's device emulation for I/O), but KVM only ever offered a | |
| 632 small subset of the functionality of QEMU, and current versions of QEMU have | |
| 633 merged KVM support into the base package. (QEMU 0.11.0 can automatically | |
| 634 detect and use the KVM module as an accelerator, where appropriate.)</p> | |
| 635 | |
| 636 <p>It's a bit like the X11 project providing a "drm" module (for 3D acceleration | |
| 637 and such), which was integrated upstream into the Linux kernel. The Linux | |
| 638 kernel was never part of the X11 project, and vice versa, and pretending the | |
| 639 two projects were the same thing would be wrong.</p> | |
| 640 | |
| 641 <p>That said, on Ubuntu the "qemu" package is an alias for "qemu-kvm", a | |
| 642 package which only supports i386 and x86_64 (because that's all KVM supports | |
| 643 when running on an x86 PC). In order to install the rest of qemu (support | |
| 644 for emulating arm, mips, powerpc, sh4, and so on), you need to install | |
| 645 the "qemu-kvm-extras" package (which despite the name has nothing whatsoever | |
| 646 to do with KVM).</p> | |
| 647 | |
| 648 <p>Support for non-x86 targets is part of the base package when you build QEMU | |
| 649 from source. If you ignore Ubuntu's packaging insanity and build QEMU | |
| 650 from source, you shouldn't have to worry about this strangely named | |
| 651 artificial split.</p> | |
| 652 | |
| 653 <hr /><a name=windows /><h2>Q: Do you care about windows?</h2> | |
| 654 | |
| 655 <p>A: Not really, but <a href=http://www.davereyn.co.uk/download.htm>this | |
| 656 guy does</a>. You can download his prebuilt binary QEMU versions for Windows, | |
| 657 and launch the various prebuilt binary Linux system images under them for | |
| 658 each target. Then if you want to rebuild the system images from source, or | |
| 659 build more software for a given target, you can do so natively within a | |
| 660 system image.</p> | |
| 661 | |
| 662 <p>If you want to cross compile from Cygwin or mingw or something, you're on | |
| 663 your own. Emulating a Linux system (thereby bypassing Windows entirely) is | |
| 664 fairly straightforward, assuming somebody else has already done the work of | |
| 665 porting the emulator. Trying to make Windows run posix apps is an unnatural | |
| 666 act involving ceremonial headgear and animal sacrifice just to get it to | |
| 667 fail the same way twice.</p> | |
| 668 | |
|
1321
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
669 <hr /><a name=impactlinux /><h2>Q: What happened to impactlinux.com?</h2> |
| 1234 | 670 |
|
1321
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
671 <p>In 2007 Mark Miller and I set up a small Linux consulting company, |
|
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
672 but after a couple years (and the recession at the end of the second |
|
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
673 Bush administration) we went on to other things.</p> |
|
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
674 |
|
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
675 <p>I kept the project hosted on the impactlinux.com website (which was |
|
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
676 higher bandwidth than landley.net), but Mark shut down the website in |
|
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
677 2010 when the corporation expired. Due to a miscommunication, this caught |
|
4c0a2018502c
Clean up old references to impactlinux.com, add a FAQ explaining why that site went away, and start the long and winding process of redoing documentation.hmtl.
Rob Landley <rob@landley.net>
parents:
1285
diff
changeset
|
678 me by surprise, and the mailing list archives and subscribers were lost.<p> |
|
1185
d413e255c812
Add lots of debugging HOWTO information. More to come.
Rob Landley <rob@landley.net>
parents:
1119
diff
changeset
|
679 |
| 1397 | 680 <hr /><a name=android /><h2>Q: What if I want to play with android?</h2> |
| 681 | |
| 682 <p>The Aboriginal Linux root filesystem should work just fine under Android's | |
| 683 proprietary Linux kernel fork: you can extract the root-filesystem-armv5l | |
| 684 tarball and chroot on most android hardware and life is good.</p> | |
| 685 | |
| 686 <p>Integrating Android userspace with Linux userspace is a bit more | |
| 687 complicated: Google decided they didn't want any GPL code in userspace, so they | |
| 688 rewrote the whole root filesystem from scratch. (The end result is missing | |
| 689 many features, and in doing so they opened themselves to a Java | |
| 690 patent lawsuit from Oratroll, we never said it was a _good_ decision.)</p> | |
| 691 | |
| 692 <p>This means that Android userspace doesn't use glibc or uClibc, it uses | |
| 693 an incompatible BSD-derived library called "bionic". Think "klibc with | |
| 694 threading support" and you're not far off: it's missing a lot of stuff | |
| 695 needed to build most conventional Linux userspace packages against it.</p> | |
| 696 | |
| 697 <p>However, the Android _kernel_ is mostly Linux. It's a fragmented mix | |
| 698 of several different obsolete forks with lots of garbage added, but Google's | |
| 699 idea of "embedded development" focused on adding stuff to the kernel rather | |
| 700 than removing stuff, so you can mostly ignore the differences. This means | |
| 701 binaries built against uClibc should run on the android kernel just fine: | |
| 702 assuming they're statically linked, or that you install the uClibc shared | |
| 703 libraries (possibly alongside the bionic ones).</p> | |
| 704 | |
| 705 <p>The other major deficiency of Android is "toolbox", which is their | |
| 706 clone of busybox. (It has nothing to do with toybox, either: that's also | |
| 707 GPL. About half the code and ideas of toybox went upstream into busybox | |
| 708 anyway, the rest is mothballed.)</p> | |
| 709 | |
| 710 <p>Android's toolbox is crap, and the first thing any serious developer | |
| 711 does is install busybox. Here's the easy way to do that.</p> | |
| 712 | |
| 713 <p>Download the <a href=http://busybox.net/downloads/binaries/latest/busybox-armv5l>armv5l prebuilt busybox binary</a> from the busybox website onto your | |
| 714 android device. (These are the binaries Aboriginal Linux makes, but | |
| 715 the busybox website seemed like a better place for an ex-busybox maintainer | |
| 716 to save them than the Aboriginal downloads/binaries directory. You can | |
| 717 grab busybox out of root-filesystem-armv5l if you prefer.)</p> | |
| 718 | |
| 719 <p>This file is statically linked against uClibc, so it doesn't require | |
| 720 any external dependencies, meaning it should run on an Android system. | |
| 721 Now let's install it:</p> | |
| 722 | |
| 723 <p>Make a /busybox directory, move the busybox-armv5l binary to | |
| 724 /busybox/busybox (this will both move it and rename it), and "chmod 700 | |
| 725 /busybox/busybox". (The toolbox chmod doesn't understand "u+x", you have | |
| 726 to give it numbers. This is one of the many, many things this procedure | |
| 727 fixes.)</p> | |
| 728 | |
| 729 <p>Now run "PATH=/busybox busybox sh" to get a real shell prompt with command | |
| 730 history. In that command prompt run this:</p> | |
| 731 | |
| 732 <blockquote> | |
| 733 <pre> | |
| 734 for i in $(busybox --list); do ln -s busybox /busybox/$i; done | |
| 735 </pre> | |
| 736 </blockquote> | |
| 737 | |
| 738 <p>That gives you a /busybox directory full of symlinks to busybox. You're | |
| 739 running in a shell with a $PATH looking at those busybox commands, so any | |
| 740 command you type should run the busybox version.</p> | |
| 741 | |
| 742 <p>You should be able to take it from there.</p> | |
| 743 | |
|
1460
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
744 <hr /><a name=new_syscalls><h2>Q: Why don't your prebuilt binaries |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
745 work in my ancient system?</h2> |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
746 |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
747 <p>Linux periodically adds new features, and binaries built using those |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
748 new features may not run on old kernels. (Linux continues to support old |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
749 binaries, known as "backwards compatability", but does not promise that new |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
750 programs will always run on old systems.)</p> |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
751 |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
752 <p>For example, powerpc Linux didn't used to have proper socket system calls |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
753 but had to make do with more elaborate/indirect mechanisms. |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
754 <a href=http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=86250b9d12caa1>This got fixed</a> during the 2.6.36 development cycle, and |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
755 binaries built against a C library using the newer kernel headers will use |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
756 the new system() syscall as appropriate, resulting in an -ENOSYS error |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
757 on older kernels that doesn't implement the new system call.</p> |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
758 |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
759 <p>You can use the alternate package mechanism to build against an older |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
760 kernel (such as 2.6.35) and then run ./native-build.sh static-tools.hdc in |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
761 the resulting system-image-powerpc to get dropbearmulti and busybox binaries |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
762 that restrict themselves to the old system calls.</p> |
|
876d4849afa1
New FAQ, "why don't your prebuilt binaries work in my ancient root filesystem". Which is more about ancient kernels not having new system calls, really...
Rob Landley <rob@landley.net>
parents:
1397
diff
changeset
|
763 |
| 889 | 764 <!--#include file="footer.html" --> |
| 765 </html> |