AC_REQUIRE([AC_C_INLINE])
AH_VERBATIM([extern_inline],
[/* _GL_INLINE is a portable alternative to ISO C99 plain 'inline'.
- _GL_EXTERN_INLINE is a portable alternative to 'extern linline'.
+ _GL_EXTERN_INLINE is a portable alternative to 'extern inline'.
_GL_INLINE_HEADER_BEGIN contains useful stuff to put
in an include file, before uses of _GL_INLINE.
It suppresses GCC's bogus "no previous prototype for 'FOO'" diagnostic,
<http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113>.
_GL_INLINE_HEADER_END contains useful stuff to put
in the same include file, after uses of _GL_INLINE. */
-#if __GNUC__ ? __GNUC_STDC_INLINE__ : 199901L <= __STDC_VERSION__
+#if (__GNUC__ \
+ ? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \
+ : 199901L <= __STDC_VERSION__)
# define _GL_INLINE inline
# define _GL_EXTERN_INLINE extern inline
-# if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__
-# define _GL_INLINE_HEADER_BEGIN \
- _Pragma ("GCC diagnostic push") \
- _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"")
-# define _GL_INLINE_HEADER_END \
- _Pragma ("GCC diagnostic pop")
+#elif 2 < __GNUC__ + (7 <= __GNUC_MINOR__)
+# if __GNUC_GNU_INLINE__
+ /* __gnu_inline__ suppresses a GCC 4.2 diagnostic. */
+# define _GL_INLINE extern inline __attribute__ ((__gnu_inline__))
+# else
+# define _GL_INLINE extern inline
# endif
+# define _GL_EXTERN_INLINE extern
#else
# define _GL_INLINE static inline
# define _GL_EXTERN_INLINE static inline
#endif
-#ifndef _GL_INLINE_HEADER_BEGIN
+#if 4 < __GNUC__ + (6 <= __GNUC_MINOR__)
+# if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__
+# define _GL_INLINE_HEADER_CONST_PRAGMA
+# else
+# define _GL_INLINE_HEADER_CONST_PRAGMA \
+ _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"")
+# endif
+# define _GL_INLINE_HEADER_BEGIN \
+ _Pragma ("GCC diagnostic push") \
+ _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \
+ _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \
+ _GL_INLINE_HEADER_CONST_PRAGMA
+# define _GL_INLINE_HEADER_END \
+ _Pragma ("GCC diagnostic pop")
+#else
# define _GL_INLINE_HEADER_BEGIN
# define _GL_INLINE_HEADER_END
#endif])