mesa: Replace a priori knowledge of gcc attributes with configure tests.

Note that I had to add support for testing the packed attribute to
m4/ax_gcc_func_attribute.m4.

Reviewed-by: Jason Ekstrand <[email protected]> [C bits]
Reviewed-by: Ian Romanick <[email protected]>

1 files changed, 6 insertions, 0 deletions

diff --git a/scons/gallium.py b/scons/gallium.py
index ef6df1ae1a9..dd5ca56a2db 100755
--- a/scons/gallium.py
+++ b/scons/gallium.py
@@ -589,7 +589,13 @@ def generate(env):
             'HAVE___BUILTIN_EXPECT',
             'HAVE___BUILTIN_FFS',
             'HAVE___BUILTIN_FFSLL',
+            'HAVE_FUNC_ATTRIBUTE_FLATTEN',
         ]
+        if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('3'):
+            cppdefines += [
+                'HAVE_FUNC_ATTRIBUTE_FORMAT',
+                'HAVE_FUNC_ATTRIBUTE_PACKED',
+            ]
         if distutils.version.LooseVersion(ccversion) >= distutils.version.LooseVersion('3.4'):
             cppdefines += [
                 'HAVE___BUILTIN_CTZ',