dnl 'extern inline' a la ISO C99.
-dnl Copyright 2012 Free Software Foundation, Inc.
+dnl Copyright 2012-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_EXTERN_INLINE],
[
- 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 inline'.
when FOO is an inline function in the header; see
<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__
+ in the same include file, after uses of _GL_INLINE.
+
+ Suppress extern inline with HP-UX cc, as it appears to be broken; see
+ <http://lists.gnu.org/archive/html/bug-texinfo/2013-02/msg00030.html>.
+
+ Suppress the use of extern inline on Apple's platforms,
+ as Libc-825.25 (2012-09-19) is incompatible with it; see
+ <http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html>.
+ Perhaps Apple will fix this some day. */
+#if ((__GNUC__ \
+ ? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \
+ : 199901L <= __STDC_VERSION__ && !defined __HP_cc) \
+ && !defined __APPLE__)
# 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\"") \
- _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"")
-# define _GL_INLINE_HEADER_END \
- _Pragma ("GCC diagnostic pop")
+#elif 2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __APPLE__
+# 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
+# define _GL_INLINE static _GL_UNUSED
+# define _GL_EXTERN_INLINE static _GL_UNUSED
#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])