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 <bobby.pr...@gmail.com>
---
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
--
2.9.2
