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|
#!/bin/bash
# This has to be a separate file from scripts/make.sh so it can be called
# before menuconfig. (It's called again from scripts/make.sh just to be sure.)
mkdir -p generated
source configure
# Probe for a single config symbol with a "compiles or not" test.
# Symbol name is first argument, flags second, feed C file to stdin
probesymbol()
{
${CROSS_COMPILE}${CC} $CFLAGS -xc -o /dev/null $2 - 2>/dev/null
[ $? -eq 0 ] && DEFAULT=y || DEFAULT=n
rm a.out 2>/dev/null
echo -e "config $1\n\tbool" || exit 1
echo -e "\tdefault $DEFAULT\n" || exit 1
}
probeconfig()
{
# Probe for container support on target
probesymbol TOYBOX_CONTAINER << EOF
#include <linux/sched.h>
int x=CLONE_NEWNS|CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWNET;
int main(int argc, char *argv[]) { return unshare(x); }
EOF
probesymbol TOYBOX_FIFREEZE -c << EOF
#include <linux/fs.h>
#ifndef FIFREEZE
#error nope
#endif
EOF
# Work around some uClibc limitations
probesymbol TOYBOX_ICONV -c << EOF
#include "iconv.h"
EOF
probesymbol TOYBOX_FALLOCATE << EOF
#include <fcntl.h>
int main(int argc, char *argv[]) { return posix_fallocate(0,0,0); }
EOF
}
genconfig()
{
# Reverse sort puts posix first, examples last.
for j in $(ls toys/*/README | sort -r)
do
DIR="$(dirname "$j")"
[ $(ls "$DIR" | wc -l) -lt 2 ] && continue
echo "menu \"$(head -n 1 $j)\""
echo
# extract config stanzas from each source file, in alphabetical order
for i in $(ls -1 $DIR/*.c)
do
# Grab the config block for Config.in
echo "# $i"
sed -n '/^\*\//q;/^config [A-Z]/,$p' $i || return 1
echo
done
echo endmenu
done
}
probeconfig > generated/Config.probed || rm generated/Config.probed
genconfig > generated/Config.in || rm generated/Config.in
|
