view sources/toys/README.footer @ 1187:878dbfe76341

Move $BUILD/logs creation from record-commands.sh to include.sh so it gets reliably recreated when a user blanks the logs and re-runs.
author Rob Landley <rob@landley.net>
date Sun, 01 Aug 2010 15:19:00 -0500
parents a32c75dcf508
children
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Each cross-compiler tarball contains a uClibc cross compiler for a given
target; the target binaries they produce are linked against uClibc.  For
maximum portability, they are compiled for an i686 host and statically linked
against i686 uClibc on the host.

To try out uClibc on your system, you might do something like:

  tar -xvjf cross-compiler-i686.tar.bz2
  export PATH=`pwd`/cross-compiler-i686/bin:$PATH
  i686-gcc -static hello_world.c -o hello_world
  ./hello_world

Each mini-native tarball contains a small native root filesystem (uClibc-based),
with busybox, uClibc, and a native compiler toolchain supporting C (uClibc)
and C++ (uClibc++).  To try these out, you might go:

  tar -xvjf mini-native-x86_64.tar.bz2
  sudo chroot mini-native-x86_64 /bin/chroot-setup.sh
  g++ /tools/src/hello.cpp
  ./a.out

The system-image tarballs contain the same root filesystem as mini-native,
packaged as an ext2 image, along with a kernel configured for use with
qemu (0.9.1 or later) and shell scripts to run the images under qemu:

  1) run-emulator.sh - simple script to boot qemu

  2) run-with-home.sh - adds an empty 2 gigabyte ext3 image mounted on /home

  3) run-with-distcc.sh - adds distcc support calling out to the cross compiler
     on the host system (on top of run-with-home's hdb image).

The logs directory contains build logs.  These are only of interest if you
plan to reproduce these from source and can't get it to work on the first try.

Note that chrooting into mini-native-i686 on an x86_64 host may not give you
a good build environment, because /proc will still show an x86_64 host kernel
in an i686 chroot, and this confuses many ./configure scripts.

Cross compiling is tricky.  The easy way to build packages is to build fully
natively, either by booting a system image under qemu or by finding real
target hardware to build on.