Commit | Line | Data |
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7ae4e75a LC |
1 | dnl 'extern inline' a la ISO C99. |
2 | ||
3 | dnl Copyright 2012 Free Software Foundation, Inc. | |
4 | dnl This file is free software; the Free Software Foundation | |
5 | dnl gives unlimited permission to copy and/or distribute it, | |
6 | dnl with or without modifications, as long as this notice is preserved. | |
7 | ||
8 | AC_DEFUN([gl_EXTERN_INLINE], | |
9 | [ | |
10 | AC_REQUIRE([AC_C_INLINE]) | |
11 | AH_VERBATIM([extern_inline], | |
12 | [/* _GL_INLINE is a portable alternative to ISO C99 plain 'inline'. | |
13 | _GL_EXTERN_INLINE is a portable alternative to 'extern inline'. | |
14 | _GL_INLINE_HEADER_BEGIN contains useful stuff to put | |
15 | in an include file, before uses of _GL_INLINE. | |
16 | It suppresses GCC's bogus "no previous prototype for 'FOO'" diagnostic, | |
17 | when FOO is an inline function in the header; see | |
18 | <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113>. | |
19 | _GL_INLINE_HEADER_END contains useful stuff to put | |
20 | in the same include file, after uses of _GL_INLINE. */ | |
21 | #if (__GNUC__ \ | |
22 | ? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \ | |
23 | : 199901L <= __STDC_VERSION__) | |
24 | # define _GL_INLINE inline | |
25 | # define _GL_EXTERN_INLINE extern inline | |
26 | #elif 2 < __GNUC__ + (7 <= __GNUC_MINOR__) | |
27 | # if __GNUC_GNU_INLINE__ | |
28 | /* __gnu_inline__ suppresses a GCC 4.2 diagnostic. */ | |
29 | # define _GL_INLINE extern inline __attribute__ ((__gnu_inline__)) | |
30 | # else | |
31 | # define _GL_INLINE extern inline | |
32 | # endif | |
33 | # define _GL_EXTERN_INLINE extern | |
34 | #else | |
35 | # define _GL_INLINE static inline | |
36 | # define _GL_EXTERN_INLINE static inline | |
37 | #endif | |
38 | ||
39 | #if 4 < __GNUC__ + (6 <= __GNUC_MINOR__) | |
40 | # if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ | |
41 | # define _GL_INLINE_HEADER_CONST_PRAGMA | |
42 | # else | |
43 | # define _GL_INLINE_HEADER_CONST_PRAGMA \ | |
44 | _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"") | |
45 | # endif | |
46 | # define _GL_INLINE_HEADER_BEGIN \ | |
47 | _Pragma ("GCC diagnostic push") \ | |
48 | _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \ | |
49 | _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \ | |
50 | _GL_INLINE_HEADER_CONST_PRAGMA | |
51 | # define _GL_INLINE_HEADER_END \ | |
52 | _Pragma ("GCC diagnostic pop") | |
53 | #else | |
54 | # define _GL_INLINE_HEADER_BEGIN | |
55 | # define _GL_INLINE_HEADER_END | |
56 | #endif]) | |
57 | ]) |