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annotate scripts/genconfig.sh @ 1260:0ce03bb85ebd draft

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Probe for the existence of FIFREEZE and make fsfreeze depend on it.
author Rob Landley <rob@landley.net>
date Wed, 16 Apr 2014 07:49:32 -0500
parents 565980862743
children a302299dbb98
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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d4176f3f3835 Zap toys/Config.in and instead create generated/Config.in from contents of
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1 #!/bin/bash
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2
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3 # This has to be a separate file from scripts/make.sh so it can be called
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4 # before menuconfig. (It's called again from scripts/make.sh just to be sure.)
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5
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6 mkdir -p generated
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7
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8 source configure
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9
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10 # Probe for a single config symbol with a "compiles or not" test.
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11 # Symbol name is first argument, flags second, feed C file to stdin
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12 probesymbol()
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13 {
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14 ${CROSS_COMPILE}${CC} $CFLAGS -xc -o /dev/null $2 - 2>/dev/null
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15 [ $? -eq 0 ] && DEFAULT=y || DEFAULT=n
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16 rm a.out 2>/dev/null
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17 echo -e "config $1\n\tbool" || exit 1
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18 echo -e "\tdefault $DEFAULT\n" || exit 1
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19 }
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20
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21 probeconfig()
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22 {
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23 # Probe for container support on target
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24 probesymbol TOYBOX_CONTAINER << EOF
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25 #include <linux/sched.h>
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26 int x=CLONE_NEWNS|CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWNET;
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27
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28 int main(int argc, char *argv[]) { return unshare(x); }
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29 EOF
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30
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31 probesymbol TOYBOX_FIFREEZE -c << EOF
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32 #include <linux/fs.h>
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33 #ifndef FIFREEZE
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34 #error nope
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35 #endif
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36 EOF
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37 }
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38
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39 genconfig()
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40 {
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41 # I could query the directory here, but I want to control the order
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42 # and capitalization in the menu
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43 for j in toys/*/README
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44 do
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45 DIR="$(dirname "$j")"
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46
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47 [ $(ls "$DIR" | wc -l) -lt 2 ] && continue
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49 echo "menu \"$(head -n 1 $j)\""
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50 echo
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51
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52 # extract config stanzas from each source file, in alphabetical order
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53 for i in $(ls -1 $DIR/*.c)
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54 do
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55 # Grab the config block for Config.in
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56 echo "# $i"
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57 sed -n '/^\*\//q;/^config [A-Z]/,$p' $i || return 1
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58 echo
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59 done
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60
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61 echo endmenu
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62 done
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63 }
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65 probeconfig > generated/Config.probed || rm generated/Config.probed
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66 genconfig > generated/Config.in || rm generated/Config.in