Commit | Line | Data |
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a0d4efe9 PE |
1 | dnl 'extern inline' a la ISO C99. |
2 | ||
9ff99d22 | 3 | dnl Copyright 2012-2013 Free Software Foundation, Inc. |
a0d4efe9 PE |
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 | [ | |
a0d4efe9 | 10 | AH_VERBATIM([extern_inline], |
ec9295ae | 11 | [/* Please see the Gnulib manual for how to use these macros. |
904dd565 | 12 | |
89bd9d36 PE |
13 | Suppress extern inline with HP-UX cc, as it appears to be broken; see |
14 | <http://lists.gnu.org/archive/html/bug-texinfo/2013-02/msg00030.html>. | |
15 | ||
d9774ea4 PE |
16 | Suppress extern inline with Sun C in standards-conformance mode, as it |
17 | mishandles inline functions that call each other. E.g., for 'inline void f | |
18 | (void) { } inline void g (void) { f (); }', c99 incorrectly complains | |
19 | 'reference to static identifier "f" in extern inline function'. | |
20 | This bug was observed with Sun C 5.12 SunOS_i386 2011/11/16. | |
21 | ||
22 | Suppress the use of extern inline on Apple's platforms, as Libc at least | |
23 | through Libc-825.26 (2013-04-09) is incompatible with it; see, e.g., | |
904dd565 PE |
24 | <http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html>. |
25 | Perhaps Apple will fix this some day. */ | |
26 | #if ((__GNUC__ \ | |
27 | ? defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ \ | |
d9774ea4 PE |
28 | : (199901L <= __STDC_VERSION__ \ |
29 | && !defined __HP_cc \ | |
30 | && !(defined __SUNPRO_C && __STDC__))) \ | |
904dd565 | 31 | && !defined __APPLE__) |
a0d4efe9 PE |
32 | # define _GL_INLINE inline |
33 | # define _GL_EXTERN_INLINE extern inline | |
904dd565 | 34 | #elif 2 < __GNUC__ + (7 <= __GNUC_MINOR__) && !defined __APPLE__ |
01b13eb7 PE |
35 | # if __GNUC_GNU_INLINE__ |
36 | /* __gnu_inline__ suppresses a GCC 4.2 diagnostic. */ | |
37 | # define _GL_INLINE extern inline __attribute__ ((__gnu_inline__)) | |
38 | # else | |
39 | # define _GL_INLINE extern inline | |
a0d4efe9 | 40 | # endif |
01b13eb7 | 41 | # define _GL_EXTERN_INLINE extern |
a0d4efe9 | 42 | #else |
904dd565 PE |
43 | # define _GL_INLINE static _GL_UNUSED |
44 | # define _GL_EXTERN_INLINE static _GL_UNUSED | |
a0d4efe9 PE |
45 | #endif |
46 | ||
01b13eb7 | 47 | #if 4 < __GNUC__ + (6 <= __GNUC_MINOR__) |
65788e2e | 48 | # if defined __GNUC_STDC_INLINE__ && __GNUC_STDC_INLINE__ |
01b13eb7 PE |
49 | # define _GL_INLINE_HEADER_CONST_PRAGMA |
50 | # else | |
51 | # define _GL_INLINE_HEADER_CONST_PRAGMA \ | |
52 | _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"") | |
53 | # endif | |
ec9295ae PE |
54 | /* Suppress GCC's bogus "no previous prototype for 'FOO'" |
55 | and "no previous declaration for 'FOO'" diagnostics, | |
56 | when FOO is an inline function in the header; see | |
57 | <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54113>. */ | |
01b13eb7 PE |
58 | # define _GL_INLINE_HEADER_BEGIN \ |
59 | _Pragma ("GCC diagnostic push") \ | |
60 | _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \ | |
61 | _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \ | |
62 | _GL_INLINE_HEADER_CONST_PRAGMA | |
63 | # define _GL_INLINE_HEADER_END \ | |
64 | _Pragma ("GCC diagnostic pop") | |
65 | #else | |
a0d4efe9 PE |
66 | # define _GL_INLINE_HEADER_BEGIN |
67 | # define _GL_INLINE_HEADER_END | |
68 | #endif]) | |
69 | ]) |