From 408027022fef38fe0ae1a83e9bd5c47029434224 Mon Sep 17 00:00:00 2001 From: Guus Sliepen Date: Mon, 30 Apr 2018 21:06:51 +0200 Subject: [PATCH] Only set -fno-strict-overflow if -fwrapv is not available. When -fwrapv is set, -fno-strict-overflow has no effect. Clang then decides to give an obnoxious warning. --- configure.ac | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/configure.ac b/configure.ac index cbfb9e5e..b4672e0c 100644 --- a/configure.ac +++ b/configure.ac @@ -59,8 +59,9 @@ dnl No -fstack-protector-all because it doesn't work on all platforms or archite AC_ARG_ENABLE([hardening], AS_HELP_STRING([--disable-hardening], [disable compiler and linker hardening flags])) AS_IF([test "x$enable_hardening" != "xno"], [AX_CHECK_COMPILE_FLAG([-DFORTIFY_SOURCE=2], [CPPFLAGS="$CPPFLAGS -DFORITFY_SOURCE=2"]) - AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [CPPFLAGS="$CPPFLAGS -fno-strict-overflow"]) - AX_CHECK_COMPILE_FLAG([-fwrapv], [CPPFLAGS="$CPPFLAGS -fwrapv"]) + AX_CHECK_COMPILE_FLAG([-fwrapv], [CPPFLAGS="$CPPFLAGS -fwrapv"], + [AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [CPPFLAGS="$CPPFLAGS -fno-strict-overflow"])] + ) case $host_os in *mingw*) AX_CHECK_LINK_FLAG([-Wl,--dynamicbase], [LDFLAGS="$LDFLAGS -Wl,--dynamicbase"]) -- 2.39.5