Since 218bb57dd79d6843e0592c30a82ea8c1fddc74a5, the -fsanitize=address check fails with: config-temp/qemu-conf.c:3:20: error: integer overflow in expression [-Werror=overflow] return INT32_MIN / -1;
Interestingly, UBSAN check doesn't produce a compile time warning. Use a test that doesn't have compile time warnings, and make it specific to UBSAN check. Signed-off-by: Marc-André Lureau <marcandre.lur...@redhat.com> --- configure | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) diff --git a/configure b/configure index 913e14839d..cc610823e1 100755 --- a/configure +++ b/configure @@ -5306,25 +5306,27 @@ fi ########################################## # checks for sanitizers -# we could use a simple skeleton for flags checks, but this also -# detect the static linking issue of ubsan, see also: -# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84285 -cat > $TMPC << EOF -#include <stdint.h> -int main(void) { - return INT32_MIN / -1; -} -EOF - have_asan=no have_ubsan=no have_asan_iface_h=no have_asan_iface_fiber=no if test "$sanitizers" = "yes" ; then + write_c_skeleton if compile_prog "$CPU_CFLAGS -Werror -fsanitize=address" ""; then have_asan=yes fi + + # we could use a simple skeleton for flags checks, but this also + # detect the static linking issue of ubsan, see also: + # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84285 + cat > $TMPC << EOF +#include <stdlib.h> +int main(void) { + void *tmp = malloc(10); + return *(int *)(tmp + 2); +} +EOF if compile_prog "$CPU_CFLAGS -Werror -fsanitize=undefined" ""; then have_ubsan=yes fi -- 2.16.1.73.g5832b7e9f2
