build: stop clang complaining about redefined typedefs

Clang's gnu99 mode is not quite the same as GCC's. It will complain
about redefined typedefs being a C11 feature, while GCC does not
complain and allows them in gnu99 mode.

Reviewed-by: Fabiano Fidêncio <fidencio@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

diff --git a/m4/virt-compile-warnings.m4 b/m4/virt-compile-warnings.m4
index 26f231f97e8e37b030981749ad1946105412adb5..4f9eee121c4232f3aaf609a156f5f9d491968e1b 100644 (file)
--- a/m4/virt-compile-warnings.m4
+++ b/m4/virt-compile-warnings.m4
@@ -125,6 +125,10 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
     # We do "bad" function casts all the time for event callbacks
     wantwarn="$wantwarn -Wno-cast-function-type"
 
+    # CLang incorrectly complains about dup typedefs win gnu99 mode
+    # so use this CLang-specific arg to keep it quiet
+    wantwarn="$wantwarn -Wno-typedef-redefinition"
+
     # GNULIB expects this to be part of -Wc++-compat, but we turn
     # that one off, so we need to manually enable this again
     wantwarn="$wantwarn -Wjump-misses-init"