configure

trap 'rm -f semtest*' EXIT
set -e

cat <<EOF >semtest.c
#include <semaphore.h>
int main(void) {
	(void)SEM_FAILED;
	sem_close((sem_t *)1);
	sem_open((const char *)1, 0, 0);
	sem_post((sem_t *)1);
	sem_unlink((const char *)1);
	sem_wait((sem_t *)1);
}
EOF

cat <<'EOF' >semtest.makefile
semtest: semtest.o
	$(CC) $(LDFLAGS) -o $@ semtest.o
EOF

for ldflags in ${LDFLAGS:+"$LDFLAGS"} '' -lrt -lpthread \
	-landroid-posix-semaphore; do
	rm -f semtest.o
	if make -f semtest.makefile "LDFLAGS=$ldflags" >/dev/null 2>&1; then
		cat <<EOF >makefile
${CC:+CC = $CC
}CFLAGS = -O2
LDFLAGS = $ldflags

bm: bm.o
	\$(CC) \$(LDFLAGS) -o \$@ bm.o

clean:
	rm -rf bm bm.o
EOF
		exit
	fi
done

echo failed >&2
exit 1
# vim: ft=sh