From b9f44da2f2cdc1a1a1be5aed0c46bd7fcc69cf4a Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Date: Thu, 15 Feb 2018 22:25:47 +0100 Subject: build-sys: fix -fsanitize=address check MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Message-Id: <20180215212552.26997-2-marcandre.lureau@redhat.com> Reviewed-by: Emilio G. Cota Signed-off-by: Paolo Bonzini --- configure | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) (limited to 'configure') diff --git a/configure b/configure index 27d3f66bd5..7ff00f8e81 100755 --- a/configure +++ b/configure @@ -5316,25 +5316,27 @@ 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 > $TMPC << EOF -#include -int main(void) { - return INT32_MIN / -1; -} -EOF - have_asan=no have_ubsan=no have_asan_iface_h=no have_asan_iface_fiber=no if test "$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 > $TMPC << EOF +#include +int main(void) { + void *tmp = malloc(10); + return *(int *)(tmp + 2); +} +EOF if compile_prog "$CPU_CFLAGS -Werror -fsanitize=undefined" ""; then have_ubsan=yes fi -- cgit v1.2.1