Commit 20bc94a2 authored by Paolo Bonzini's avatar Paolo Bonzini
Browse files

build: disable -Wmissing-braces on older compilers 



GCC 4.9 and newer stopped warning for missing braces around the
"universal" C zero initializer {0}.  One such initializer sneaked
into scsi/qemu-pr-helper.c and is breaking the build with such
older GCC versions.

Detect the lack of support for the idiom, and disable the warning
in that case.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent ab37bfc7

configure

+13 −0
Original line number Diff line number Diff line
@@ -1669,6 +1669,19 @@ EOF 
  fi

fi



# Disable -Wmissing-braces on older compilers that warn even for

# the "universal" C zero initializer {0}.

cat > $TMPC << EOF

struct {

  int a[2];

} x = {0};

EOF

if compile_object "-Werror" "" ; then

  :

else

  QEMU_CFLAGS="$QEMU_CFLAGS -Wno-missing-braces"

fi



# Workaround for http://gcc.gnu.org/PR55489.  Happens with -fPIE/-fPIC and

# large functions that use global variables.  The bug is in all releases of

# GCC, but it became particularly acute in 4.6.x and 4.7.x.  It is fixed in