[Qemu-devel] [RFC PATCH for 2.10 33/35] configure: clang does not support -Wexpansion-to-defined

[Philippe Mathieu-Daudé]

Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
 configure | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index 6b52e19ee3..48295aa1e6 100755
--- a/configure
+++ b/configure
@@ -1582,8 +1582,12 @@ gcc_flags="-Wold-style-declaration 
-Wold-style-definition -Wtype-limits"
 gcc_flags="-Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers 
$gcc_flags"
 gcc_flags="-Wno-missing-include-dirs -Wempty-body -Wnested-externs $gcc_flags"
 gcc_flags="-Wendif-labels -Wno-shift-negative-value $gcc_flags"
-gcc_flags="-Wno-initializer-overrides -Wexpansion-to-defined $gcc_flags"
+gcc_flags="-Wno-initializer-overrides $gcc_flags"
 gcc_flags="-Wno-string-plus-int $gcc_flags"
+# clang does not support -Wexpansion-to-defined
+if ! echo | $cc -dM -E - | grep __clang__ > /dev/null 2>&1 ; then
+    gcc_flags="-Wexpansion-to-defined $gcc_flags"
+fi
 # Note that we do not add -Werror to gcc_flags here, because that would
 # enable it for all configure tests. If a configure test failed due
 # to -Werror this would just silently disable some features,
-- 
2.13.3