On 09/08/2016 04:35, Pranith Kumar wrote: > 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 >
Can you just add it to gcc_flags instead? Thanks, Paolo
