Rémi Denis-Courmont
12 years ago
36 changed files with 166 additions and 64 deletions
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dnl 'extern inline' a la ISO C99. |
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dnl Copyright 2012-2014 Free Software Foundation, Inc. |
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dnl This file is free software; the Free Software Foundation |
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dnl gives unlimited permission to copy and/or distribute it, |
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dnl with or without modifications, as long as this notice is preserved. |
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AC_DEFUN([gl_EXTERN_INLINE], |
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[ |
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AH_VERBATIM([extern_inline], |
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[/* Please see the Gnulib manual for how to use these macros. |
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Suppress extern inline with HP-UX cc, as it appears to be broken; see |
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<http://lists.gnu.org/archive/html/bug-texinfo/2013-02/msg00030.html>. |
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Suppress extern inline with Sun C in standards-conformance mode, as it |
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mishandles inline functions that call each other. E.g., for 'inline void f |
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(void) { } inline void g (void) { f (); }', c99 incorrectly complains |
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'reference to static identifier "f" in extern inline function'. |
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This bug was observed with Sun C 5.12 SunOS_i386 2011/11/16. |
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Suppress the use of extern inline on problematic Apple configurations. |
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OS X 10.8 and earlier mishandle it; see, e.g., |
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<http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html>. |
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OS X 10.9 has a macro __header_inline indicating the bug is fixed for C and |
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for clang but remains for g++; see <http://trac.macports.org/ticket/41033>. |
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Perhaps Apple will fix this some day. */ |
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#if (defined __APPLE__ \ |
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&& (defined __header_inline \ |
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? (defined __cplusplus && defined __GNUC_STDC_INLINE__ \ |
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&& ! defined __clang__) \ |
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: ((! defined _DONT_USE_CTYPE_INLINE_ \ |
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&& (defined __GNUC__ || defined __cplusplus)) \ |
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|| (defined _FORTIFY_SOURCE && 0 < _FORTIFY_SOURCE \ |
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&& defined __GNUC__ && ! defined __cplusplus)))) |
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# define _GL_EXTERN_INLINE_APPLE_BUG |
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#endif |
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#if ((__GNUC__ \ |
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? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \ |
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: (199901L <= __STDC_VERSION__ \ |
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&& !defined __HP_cc \ |
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&& !(defined __SUNPRO_C && __STDC__))) \ |
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&& !defined _GL_EXTERN_INLINE_APPLE_BUG) |
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# define _GL_INLINE inline |
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# define _GL_EXTERN_INLINE extern inline |
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# define _GL_EXTERN_INLINE_IN_USE |
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#elif (2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __STRICT_ANSI__ \ |
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&& !defined _GL_EXTERN_INLINE_APPLE_BUG) |
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# if defined __GNUC_GNU_INLINE__ && __GNUC_GNU_INLINE__ |
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/* __gnu_inline__ suppresses a GCC 4.2 diagnostic. */ |
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# define _GL_INLINE extern inline __attribute__ ((__gnu_inline__)) |
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# else |
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# define _GL_INLINE extern inline |
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# endif |
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# define _GL_EXTERN_INLINE extern |
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# define _GL_EXTERN_INLINE_IN_USE |
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#else |
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# define _GL_INLINE static _GL_UNUSED |
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# define _GL_EXTERN_INLINE static _GL_UNUSED |
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#endif |
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#if 4 < __GNUC__ + (6 <= __GNUC_MINOR__) |
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# if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ |
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# define _GL_INLINE_HEADER_CONST_PRAGMA |
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# else |
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# define _GL_INLINE_HEADER_CONST_PRAGMA \ |
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_Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"") |
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# endif |
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/* Suppress GCC's bogus "no previous prototype for 'FOO'" |
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and "no previous declaration for 'FOO'" diagnostics, |
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when FOO is an inline function in the header; see |
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<http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113>. */ |
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# define _GL_INLINE_HEADER_BEGIN \ |
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_Pragma ("GCC diagnostic push") \ |
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_Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \ |
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_Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \ |
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_GL_INLINE_HEADER_CONST_PRAGMA |
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# define _GL_INLINE_HEADER_END \ |
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_Pragma ("GCC diagnostic pop") |
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#else |
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# define _GL_INLINE_HEADER_BEGIN |
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# define _GL_INLINE_HEADER_END |
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#endif]) |
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]) |
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