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[108.232.152.155]) by smtp.gmail.com with ESMTPSA id v84sm15198855ywb.48.2016.08.08.19.35.45 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 08 Aug 2016 19:35:45 -0700 (PDT) From: Pranith Kumar To: "Daniel P. Berrange" , Paolo Bonzini , Peter Maydell , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Stefano Stabellini , qemu-devel@nongnu.org (open list:All patches CC here) Date: Mon, 8 Aug 2016 22:35:44 -0400 Message-Id: <20160809023545.30204-1-bobby.prani@gmail.com> X-Mailer: git-send-email 2.9.2 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2607:f8b0:4002:c09::242 Subject: [Qemu-devel] [PATCH] clang: Disable warning about expansion to 'defined' X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Clang produces the following warning. The warning is detailed here: https://reviews.llvm.org/D15866. Disable the warning. /home/pranith/devops/code/qemu/hw/display/qxl.c:507:5: warning: macro expansion producing 'defined' has undefined behavior [-Wexpansion-to-defined] #if SPICE_NEEDS_SET_MM_TIME ^ /home/pranith/devops/code/qemu/include/ui/qemu-spice.h:46:5: note: expanded from macro 'SPICE_NEEDS_SET_MM_TIME' (!defined(SPICE_SERVER_VERSION) || (SPICE_SERVER_VERSION < 0xc06)) ^ /home/pranith/devops/code/qemu/hw/display/qxl.c:1074:5: warning: macro expansion producing 'defined' has undefined behavior [-Wexpansion-to-defined] #if SPICE_NEEDS_SET_MM_TIME ^ /home/pranith/devops/code/qemu/include/ui/qemu-spice.h:46:5: note: expanded from macro 'SPICE_NEEDS_SET_MM_TIME' (!defined(SPICE_SERVER_VERSION) || (SPICE_SERVER_VERSION < 0xc06)) Signed-off-by: Pranith Kumar --- configure | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/configure b/configure index f57fcc6..a1a6e3f 100755 --- a/configure +++ b/configure @@ -3025,6 +3025,19 @@ if ! compile_prog "$glib_cflags -Werror" "$glib_libs" ; then fi fi +# Silence clang warnings about expansion to 'defined' in macro +cat > $TMPC << EOF +#define TEST (defined(DUMMY)) +#if TEST +int main(void) { return 0; } +#endif +EOF +if ! compile_prog "-Werror" ; then + if cc_has_warning_flag "-Wno-expansion-to-defined"; then + CFLAGS="-Wno-expansion-to-defined $CFLAGS" + fi +fi + ########################################## # SHA command probe for modules if test "$modules" = yes; then