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[Qemu-devel] [PULL v3 02/13] configure: silence glib unknown attribute _
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PULL v3 02/13] configure: silence glib unknown attribute __alloc_size__ |
Date: |
Thu, 12 Mar 2015 12:19:46 +0000 |
The glib headers use GCC attributes. Unfortunately the __GNUC__ and
__GNUC_MINOR__ version macros are also defined by clang, but clang
doesn't support the same attributes as GCC.
clang 3.5.0 does not support the __alloc_size__ attribute:
https://github.com/llvm-mirror/clang/commit/c047507a9a79e89fc8339e074fa72822a7e7ea73
The following warning is produced:
gstrfuncs.h:257:44: warning: unknown attribute '__alloc_size__' ignored
[-Wunknown-attributes]
G_GNUC_MALLOC G_GNUC_ALLOC_SIZE(2);
gmacros.h:67:45: note: expanded from macro 'G_GNUC_ALLOC_SIZE'
#define G_GNUC_ALLOC_SIZE(x) __attribute__((__alloc_size__(x)))
This patch checks whether glib headers cause warnings and disables
-Wunknown-attributes if that is the case.
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
configure | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/configure b/configure
index 4f9f689..00740ad 100755
--- a/configure
+++ b/configure
@@ -2773,6 +2773,16 @@ if ! $pkg_config --atleast-version=2.38 glib-2.0; then
glib_subprocess=no
fi
+# Silence clang 3.5.0 warnings about glib attribute __alloc_size__ usage
+cat > $TMPC << EOF
+#include <glib.h>
+int main(void) { return 0; }
+EOF
+if ! compile_prog "-Werror" "" ; then
+ glib_cflags="-Wno-unknown-attributes $glib_cflags"
+ CFLAGS="-Wno-unknown-attributes $CFLAGS"
+fi
+
##########################################
# SHA command probe for modules
if test "$modules" = yes; then
--
2.1.0
- [Qemu-devel] [PULL v3 00/13] Net patches, Stefan Hajnoczi, 2015/03/12
- [Qemu-devel] [PULL v3 03/13] net: synchronize net_host_device_remove with host_net_remove_completion, Stefan Hajnoczi, 2015/03/12
- [Qemu-devel] [PULL v3 02/13] configure: silence glib unknown attribute __alloc_size__,
Stefan Hajnoczi <=
- [Qemu-devel] [PULL v3 01/13] configure: handle clang -nopie argument warning, Stefan Hajnoczi, 2015/03/12
- [Qemu-devel] [PULL v3 05/13] net: add MAC address string printer, Stefan Hajnoczi, 2015/03/12
- [Qemu-devel] [PULL v3 04/13] tests: rtl8139: test timers and interrupt, Stefan Hajnoczi, 2015/03/12
- [Qemu-devel] [PULL v3 08/13] pci: add rocker device ID, Stefan Hajnoczi, 2015/03/12
- [Qemu-devel] [PULL v3 06/13] virtio-net: use qemu_mac_strdup_printf, Stefan Hajnoczi, 2015/03/12
- [Qemu-devel] [PULL v3 07/13] rocker: add register programming guide, Stefan Hajnoczi, 2015/03/12
- [Qemu-devel] [PULL v3 09/13] pci: add network device class 'other' for network switches, Stefan Hajnoczi, 2015/03/12
- [Qemu-devel] [PULL v3 11/13] rocker: add tests, Stefan Hajnoczi, 2015/03/12
- [Qemu-devel] [PULL v3 13/13] rocker: timestamp on the debug logs helps correlate with events in the VM, Stefan Hajnoczi, 2015/03/12
- Re: [Qemu-devel] [PULL v3 00/13] Net patches, Peter Maydell, 2015/03/12