compiler: -Werror=overflow hardening

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

diff --git a/configure.ac b/configure.ac
index b7fde241551bfef92bffeb999bde5fa1d4765ffc..303a5d8701c891273e7583826b0a0bbeb6769f5e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -712,6 +712,7 @@ AX_CHECK_COMPILE_FLAG([-Werror=incompatible-pointer-types], [CFLAGS="$CFLAGS -We
 AX_CHECK_COMPILE_FLAG([-Wformat=2], [CFLAGS="$CFLAGS -Wformat=2"],,[-Werror])
 AX_CHECK_COMPILE_FLAG([-Wshadow], [CFLAGS="$CFLAGS -Wshadow"],,[-Werror])
 AX_CHECK_COMPILE_FLAG([-Wendif-labels], [CFLAGS="$CFLAGS -Wendif-labels"],,[-Werror])
+AX_CHECK_COMPILE_FLAG([-Werror=overflow], [CFLAGS="$CFLAGS -Werror=overflow"],,[-Werror])
 
 AX_CHECK_LINK_FLAG([-z relro], [LDLAGS="$LDLAGS -z relro"],,[])
 AX_CHECK_LINK_FLAG([-z now], [LDLAGS="$LDLAGS -z now"],,[])