Mercurial > hg > octave-lojdl > gnulib-hg
annotate m4/extern-inline.m4 @ 17056:373b50f0c218
extern-inline: support old GCC 'inline'
* m4/extern-inline.m4 (gl_EXTERN_INLINE): Use pre-C99 GCC 'inline'
if available. This applies to GCC versions 2.7 through 4.2, or
when newer GCC is using -fgnu89-inline. The goal is to address
some of the performance issues mentioned by Bruno Haible in
<http://lists.gnu.org/archive/html/bug-gnulib/2012-08/msg00097.html>.
| author | Paul Eggert <eggert@cs.ucla.edu> |
|---|---|
| date | Mon, 20 Aug 2012 17:01:18 -0700 |
| parents | 599464b0cbf8 |
| children | 03d96692c889 |
| rev | line source |
|---|---|
| 17022 | 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'. | |
|
17029
a3c4b8128bde
Fix typo: 'linline' -> 'inline' (thanks to Eric Blake).
Paul Eggert <eggert@cs.ucla.edu>
parents:
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changeset
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13 _GL_EXTERN_INLINE is a portable alternative to 'extern inline'. |
| 17027 | 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. */ | |
| 17022 | 21 #if __GNUC__ ? __GNUC_STDC_INLINE__ : 199901L <= __STDC_VERSION__ |
| 22 # define _GL_INLINE inline | |
| 23 # define _GL_EXTERN_INLINE extern inline | |
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17056
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extern-inline: support old GCC 'inline'
Paul Eggert <eggert@cs.ucla.edu>
parents:
17035
diff
changeset
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24 #elif 2 < __GNUC__ + (7 <= __GNUC_MINOR__) |
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parents:
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diff
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25 # if __GNUC_GNU_INLINE__ |
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parents:
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diff
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26 /* __gnu_inline__ suppresses a GCC 4.2 diagnostic. */ |
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parents:
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diff
changeset
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27 # define _GL_INLINE extern inline __attribute__ ((__gnu_inline__)) |
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parents:
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28 # else |
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parents:
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29 # define _GL_INLINE extern inline |
| 17022 | 30 # endif |
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parents:
17035
diff
changeset
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31 # define _GL_EXTERN_INLINE extern |
| 17022 | 32 #else |
| 33 # define _GL_INLINE static inline | |
| 34 # define _GL_EXTERN_INLINE static inline | |
| 35 #endif | |
| 36 | |
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extern-inline: support old GCC 'inline'
Paul Eggert <eggert@cs.ucla.edu>
parents:
17035
diff
changeset
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37 #if 4 < __GNUC__ + (6 <= __GNUC_MINOR__) |
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Paul Eggert <eggert@cs.ucla.edu>
parents:
17035
diff
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38 # if __GNUC_STDC_INLINE__ |
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parents:
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39 # define _GL_INLINE_HEADER_CONST_PRAGMA |
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parents:
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40 # else |
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parents:
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41 # define _GL_INLINE_HEADER_CONST_PRAGMA \ |
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parents:
17035
diff
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42 _Pragma ("GCC diagnostic ignored \"-Wsuggest-attribute=const\"") |
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parents:
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43 # endif |
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parents:
17035
diff
changeset
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44 # define _GL_INLINE_HEADER_BEGIN \ |
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Paul Eggert <eggert@cs.ucla.edu>
parents:
17035
diff
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45 _Pragma ("GCC diagnostic push") \ |
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Paul Eggert <eggert@cs.ucla.edu>
parents:
17035
diff
changeset
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46 _Pragma ("GCC diagnostic ignored \"-Wmissing-prototypes\"") \ |
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373b50f0c218
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Paul Eggert <eggert@cs.ucla.edu>
parents:
17035
diff
changeset
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47 _Pragma ("GCC diagnostic ignored \"-Wmissing-declarations\"") \ |
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373b50f0c218
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Paul Eggert <eggert@cs.ucla.edu>
parents:
17035
diff
changeset
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48 _GL_INLINE_HEADER_CONST_PRAGMA |
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373b50f0c218
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Paul Eggert <eggert@cs.ucla.edu>
parents:
17035
diff
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49 # define _GL_INLINE_HEADER_END \ |
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Paul Eggert <eggert@cs.ucla.edu>
parents:
17035
diff
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50 _Pragma ("GCC diagnostic pop") |
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373b50f0c218
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Paul Eggert <eggert@cs.ucla.edu>
parents:
17035
diff
changeset
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51 #else |
| 17022 | 52 # define _GL_INLINE_HEADER_BEGIN |
| 53 # define _GL_INLINE_HEADER_END | |
| 54 #endif]) | |
| 55 ]) |