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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
probecc()
{
${CROSS_COMPILE}${CC} $CFLAGS -xc -o /dev/null $1 -
}
# 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()
{
probecc $2 2>/dev/null && DEFAULT=y || DEFAULT=n
rm a.out 2>/dev/null
echo -e "config $1\n\tbool" || exit 1
echo -e "\tdefault $DEFAULT\n" || exit 1
}
probeconfig()
{
> generated/cflags
# llvm produces its own really stupid warnings about things that aren't wrong,
# and although you can turn the warning off, gcc reacts badly to command line
# arguments it doesn't understand. So probe.
[ -z "$(probecc -Wno-string-plus-int <<< \#warn warn 2>&1 | grep string-plus-int)" ] &&
echo -Wno-string-plus-int >> generated/cflags
# 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
# Android and some other platforms miss utmpx
probesymbol TOYBOX_UTMPX -c << EOF
#include <utmpx.h>
#ifndef BOOT_TIME
#error nope
#endif
int main(int argc, char *argv[]) {
struct utmpx *a;
if (0 != (a = getutxent())) return 0;
return 1;
}
EOF
# Android is missing shadow.h
probesymbol TOYBOX_SHADOW -c << EOF
#include <shadow.h>
int main(int argc, char *argv[]) {
struct spwd *a = getspnam("root"); return 0;
}
EOF
# Some commands are android-specific
probesymbol TOYBOX_ON_ANDROID -c << EOF
#ifndef __ANDROID__
#error nope
#endif
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
|
