diff options
Diffstat (limited to 'gnulib-m4/extern-inline.m4')
| -rw-r--r-- | gnulib-m4/extern-inline.m4 | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/gnulib-m4/extern-inline.m4 b/gnulib-m4/extern-inline.m4 index da8a2cc0..2e914dbc 100644 --- a/gnulib-m4/extern-inline.m4 +++ b/gnulib-m4/extern-inline.m4 @@ -1,6 +1,6 @@ dnl 'extern inline' a la ISO C99. -dnl Copyright 2012-2018 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. @@ -17,7 +17,8 @@ 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 @@ -25,20 +26,32 @@ AC_DEFUN([gl_EXTERN_INLINE], if isdigit is mistakenly implemented via a static inline function, a program containing an extern inline function that calls isdigit may not work since the C standard prohibits extern inline functions - from calling static functions. This bug is known to occur on: + from calling static functions (ISO C 99 section 6.7.4.(3). + This bug is known to occur on: OS X 10.8 and earlier; see: https://lists.gnu.org/r/bug-gnulib/2012-12/msg00023.html DragonFly; see - http://muscles.dragonflybsd.org/bulk/bleeding-edge-potential/latest-per-pkg/ah-tty-0.3.12.log + http://muscles.dragonflybsd.org/bulk/clang-master-potential/20141111_102002/logs/ah-tty-0.3.12.log FreeBSD; see: https://lists.gnu.org/r/bug-gnulib/2014-07/msg00104.html OS X 10.9 has a macro __header_inline indicating the bug is fixed for C and for clang but remains for g++; see <https://trac.macports.org/ticket/41033>. - Assume DragonFly and FreeBSD will be similar. */ + Assume DragonFly and FreeBSD will be similar. + + GCC 4.3 and above with -std=c99 or -std=gnu99 implements ISO C99 + inline semantics, unless -fgnu89-inline is used. It defines a macro + __GNUC_STDC_INLINE__ to indicate this situation or a macro + __GNUC_GNU_INLINE__ to indicate the opposite situation. + GCC 4.2 with -std=c99 or -std=gnu99 implements the GNU C inline + semantics but warns, unless -fgnu89-inline is used: + warning: C99 inline functions are not supported; using GNU89 + warning: to disable this warning use -fgnu89-inline or the gnu_inline function attribute + It defines a macro __GNUC_GNU_INLINE__ to indicate this situation. + */ #if (((defined __APPLE__ && defined __MACH__) \ || defined __DragonFly__ || defined __FreeBSD__) \ && (defined __header_inline \ @@ -71,8 +84,8 @@ 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), |