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-rw-r--r--src/gcc.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/src/gcc.h b/src/gcc.h
index 45f7101f3..884e62be6 100644
--- a/src/gcc.h
+++ b/src/gcc.h
@@ -32,6 +32,9 @@
*/
#if GCC_CHECK_VERSION(3,0)
+# define gcc_const __attribute__((const))
+# define gcc_pure __attribute__((pure))
+# define gcc_malloc __attribute__((malloc))
# define gcc_must_check __attribute__ ((warn_unused_result))
# define gcc_packed __attribute__ ((packed))
/* these are very useful for type checking */
@@ -41,11 +44,21 @@
# define gcc_fprintf__ __attribute__ ((format(printf,4,5)))
# define gcc_scanf __attribute__ ((format(scanf,1,2)))
# define gcc_used __attribute__ ((used))
+# define gcc_unused __attribute__((unused))
+# define gcc_warn_unused_result __attribute__((warn_unused_result))
/* # define inline inline __attribute__ ((always_inline)) */
# define gcc_noinline __attribute__ ((noinline))
# define gcc_nonnull(...) __attribute__((nonnull(__VA_ARGS__)))
# define gcc_nonnull_all __attribute__((nonnull))
+
+# define gcc_likely(x) __builtin_expect (!!(x), 1)
+# define gcc_unlikely(x) __builtin_expect (!!(x), 0)
+
#else
+# define gcc_unused
+# define gcc_const
+# define gcc_pure
+# define gcc_malloc
# define gcc_must_check
# define gcc_packed
# define gcc_printf
@@ -54,10 +67,30 @@
# define gcc_fprintf__
# define gcc_scanf
# define gcc_used
+# define gcc_unused
+# define gcc_warn_unused_result
/* # define inline */
# define gcc_noinline
# define gcc_nonnull(...)
# define gcc_nonnull_all
+
+# define gcc_likely(x) (x)
+# define gcc_unlikely(x) (x)
+
+#endif
+
+#ifdef __cplusplus
+
+#if !defined(__clang__) && defined(__GNUC__) && !GCC_CHECK_VERSION(4,6)
+#error Your gcc version is too old. MPD requires gcc 4.6 or newer.
+#endif
+
+/* support for C++11 "override" was added in gcc 4.7 */
+#if !defined(__clang__) && defined(__GNUC__) && !GCC_CHECK_VERSION(4,7)
+#define override
+#define final
+#endif
+
#endif
#endif /* MPD_GCC_H */