diff options
Diffstat (limited to 'm4/extern-inline.m4')
| -rw-r--r-- | m4/extern-inline.m4 | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/m4/extern-inline.m4 b/m4/extern-inline.m4 index a2acf126c..8a12bddd5 100644 --- a/m4/extern-inline.m4 +++ b/m4/extern-inline.m4 @@ -1,13 +1,28 @@ dnl 'extern inline' a la ISO C99. -dnl Copyright 2012-2021 Free Software Foundation, Inc. +dnl Copyright 2012-2022 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], [ - AH_VERBATIM([extern_inline], + AC_CACHE_CHECK([whether ctype.h defines __header_inline], + [gl_cv_have___header_inline], + [AC_PREPROC_IFELSE( + [AC_LANG_SOURCE([[#include <ctype.h> + #ifndef __header_inline + #error "<ctype.h> does not define __header_inline" + #endif + ]])], + [gl_cv_have___header_inline=yes], + [gl_cv_have___header_inline=no])]) + if test "$gl_cv_have___header_inline" = yes; then + AC_DEFINE([HAVE___HEADER_INLINE], [1], + [Define to 1 if ctype.h defines __header_inline.]) + fi + + AH_VERBATIM([HAVE___HEADER_INLINE_1], [/* Please see the Gnulib manual for how to use these macros. Suppress extern inline with HP-UX cc, as it appears to be broken; see @@ -17,7 +32,8 @@ AC_DEFUN([gl_EXTERN_INLINE], mishandles inline functions that call each other. E.g., for 'inline void f (void) { } inline void g (void) { f (); }', c99 incorrectly complains 'reference to static identifier "f" in extern inline function'. - This bug was observed with Sun C 5.12 SunOS_i386 2011/11/16. + This bug was observed with Oracle Developer Studio 12.6 + (Sun C 5.15 SunOS_sparc 2017/05/30). Suppress extern inline (with or without __attribute__ ((__gnu_inline__))) on configurations that mistakenly use 'static inline' to implement @@ -53,7 +69,7 @@ AC_DEFUN([gl_EXTERN_INLINE], */ #if (((defined __APPLE__ && defined __MACH__) \ || defined __DragonFly__ || defined __FreeBSD__) \ - && (defined __header_inline \ + && (defined HAVE___HEADER_INLINE \ ? (defined __cplusplus && defined __GNUC_STDC_INLINE__ \ && ! defined __clang__) \ : ((! defined _DONT_USE_CTYPE_INLINE_ \ @@ -83,8 +99,8 @@ AC_DEFUN([gl_EXTERN_INLINE], # define _GL_EXTERN_INLINE extern # define _GL_EXTERN_INLINE_IN_USE #else -# define _GL_INLINE static _GL_UNUSED -# define _GL_EXTERN_INLINE static _GL_UNUSED +# define _GL_INLINE _GL_UNUSED static +# define _GL_EXTERN_INLINE _GL_UNUSED static #endif /* In GCC 4.6 (inclusive) to 5.1 (exclusive), |