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|
#!/bin/sh
# 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
. scripts/portability.sh
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
printf 'config %s\n\tbool\n' "$1" || exit 1
printf '\tdefault %s\n\n' "$1" || exit 1
}
probeconfig()
{
> generated/cflags
# llvm produces its own really stupid warnings about things that aren't wrong,
# and although you can turn the warning off, gcc reacts badly to command line
# arguments it doesn't understand. So probe.
[ -z "$(echo '#warn' | probecc -Wno-string-plus-int 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 <stdio.h>
#include <sys/syscall.h>
#include <linux/sched.h>
int x=CLONE_NEWNS|CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWNET;
int main(int argc, char *argv[]){printf("%d", x+SYS_unshare+ SYS_setns);}
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
# 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
probesymbol TOYBOX_ANDROID_SCHEDPOLICY << EOF
#include <processgroup/sched_policy.h>
int main(int argc,char *argv[]) { get_sched_policy_name(0); }
EOF
# nommu support
probesymbol TOYBOX_FORK << EOF
#include <unistd.h>
int main(int argc, char *argv[]) { return fork(); }
EOF
printf '\tdepends on !TOYBOX_FORCE_NOMMU\n'
probesymbol TOYBOX_PRLIMIT << EOF
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
int prlimit(pid_t pid, int resource, const struct rlimit *new_limit,
struct rlimit *old_limit);
int main(int argc, char *argv[]) { prlimit(0, 0, 0, 0); }
EOF
probesymbol TOYBOX_GETRANDOM << EOF
#include <sys/random.h>
int main(void) { char buf[100]; getrandom(buf, 100, 0); }
EOF
probesymbol TOYBOX_COPYFILERANGE << EOF
#include <sys/syscall.h>
#include <unistd.h>
int main(void) { copyfilerange(0, 0, 1, 0, 123, 0); }
EOF
}
genconfig()
{
# Reverse sort puts posix first, examples last.
for j in $(ls toys/*/README | sort -s -r)
do
DIR="$(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' $i || return 1
echo
done
echo endmenu
done
}
probeconfig > generated/Config.probed || rm generated/Config.probed
genconfig > generated/Config.in || rm generated/Config.in
# Find names of commands that can be built standalone in these C files
toys()
{
grep 'TOY(.*)' "$@" | grep -v TOYFLAG_NOFORK | grep -v "0))" | \
$SED -En 's/([^:]*):.*(OLD|NEW)TOY\( *([a-zA-Z][^,]*) *,.*/\1:\3/p'
}
WORKING=
PENDING=
toys toys/*/*.c | (
while IFS=":" read FILE NAME
do
[ "$NAME" = help ] && continue
[ "$NAME" = install ] && continue
[ "$NAME" = sh ] && FILE="toys/*/*.c"
printf '%s: %s *.[ch] lib/*.[ch]\n\tscripts/single.sh %s\n\n' \
"$NAME" "$FILE" "$NAME"
printf 'test_%s:\n\tscripts/test.sh %s\n\n' "$NAME" "$NAME"
[ "${FILE#*pending}" != "$FILE" ] &&
PENDING="$PENDING $NAME" ||
WORKING="$WORKING $NAME"
done &&
printf 'clean::\n\t@rm -f %s %s\n' "$WORKING" "$PENDING" &&
printf 'list:\n\t@echo %s\n' "$(echo $WORKING | tr ' ' '\n' | sort | xargs)" &&
printf 'list_pending:\n\t@echo %s\n' "$(echo $WORKING | tr ' ' '\n' | sort | xargs)" &&
echo ".PHONY: $WORKING $PENDING" | $SED 's/ \([^ ]\)/ test_\1/g'
) > .singlemake
|
