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authorJose Fonseca <[email protected]>2016-04-18 11:41:11 +0100
committerJose Fonseca <[email protected]>2016-04-26 17:17:00 +0100
commitc068610a7df370af94fd6177598a35c4425a75f9 (patch)
treef18989aea81a9711687987a5aabaaf147194cc45 /include
parent940da2ce0ec989c8c8f1df2ad26f4a95014f4d08 (diff)
scons: Move fallback HAVE_* definitions to headers.
These were being defined in SCons, but it's not practical: - we actually need to include Gallium headers from external source trees, with completely disjoint build infrastructure, and it's unsustainable to replicate the HAVE_xxx checks or even hard-coded defines across everywhere. - checking compiler version via command line doesn't really work due to Clang essentially being like a cameleon which can fake either GCC or MSVC There's no change for autoconf. Reviewed-by: Roland Scheidegger <[email protected]> Reviewed-by: Brian Paul <[email protected]>
Diffstat (limited to 'include')
-rw-r--r--include/c99_compat.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/include/c99_compat.h b/include/c99_compat.h
index b55ad9c181d..bfe655bb21b 100644
--- a/include/c99_compat.h
+++ b/include/c99_compat.h
@@ -135,4 +135,48 @@ test_c99_compat_h(const void * restrict a,
#endif
+/* Fallback definitions, for build systems other than autoconfig which don't
+ * auto-detect these things. */
+#ifdef HAVE_NO_AUTOCONF
+
+# ifndef _WIN32
+# define HAVE_PTHREAD
+# define HAVE_POSIX_MEMALIGN
+# endif
+
+# ifdef __GNUC__
+# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)
+# error "GCC version 4.2 or higher required"
+# endif
+
+ /* https://gcc.gnu.org/onlinedocs/gcc-4.2.4/gcc/Other-Builtins.html */
+# define HAVE___BUILTIN_CLZ 1
+# define HAVE___BUILTIN_CLZLL 1
+# define HAVE___BUILTIN_CTZ 1
+# define HAVE___BUILTIN_EXPECT 1
+# define HAVE___BUILTIN_FFS 1
+# define HAVE___BUILTIN_FFSLL 1
+# define HAVE___BUILTIN_POPCOUNT 1
+# define HAVE___BUILTIN_POPCOUNTLL 1
+ /* https://gcc.gnu.org/onlinedocs/gcc-4.2.4/gcc/Function-Attributes.html */
+# define HAVE_FUNC_ATTRIBUTE_FLATTEN 1
+# define HAVE_FUNC_ATTRIBUTE_UNUSED 1
+# define HAVE_FUNC_ATTRIBUTE_FORMAT 1
+# define HAVE_FUNC_ATTRIBUTE_PACKED 1
+
+# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3)
+ /* https://gcc.gnu.org/onlinedocs/gcc-4.3.6/gcc/Other-Builtins.html */
+# define HAVE___BUILTIN_BSWAP32 1
+# define HAVE___BUILTIN_BSWAP64 1
+# endif
+
+# if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5)
+# define HAVE___BUILTIN_UNREACHABLE 1
+# endif
+
+# endif /* __GNUC__ */
+
+#endif /* !HAVE_AUTOCONF */
+
+
#endif /* _C99_COMPAT_H_ */