diff options
Diffstat (limited to 'm4/extern-inline.m4')
-rw-r--r-- | m4/extern-inline.m4 | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/m4/extern-inline.m4 b/m4/extern-inline.m4 index 00f960968..a2acf126c 100644 --- a/m4/extern-inline.m4 +++ b/m4/extern-inline.m4 @@ -1,6 +1,6 @@ dnl 'extern inline' a la ISO C99. -dnl Copyright 2012-2017 Free Software Foundation, Inc. +dnl Copyright 2012-2021 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. @@ -11,7 +11,7 @@ AC_DEFUN([gl_EXTERN_INLINE], [/* 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 - <http://lists.gnu.org/archive/html/bug-texinfo/2013-02/msg00030.html>. + <https://lists.gnu.org/r/bug-texinfo/2013-02/msg00030.html>. Suppress extern inline with Sun C in standards-conformance mode, as it mishandles inline functions that call each other. E.g., for 'inline void f @@ -25,20 +25,32 @@ 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: - http://lists.gnu.org/archive/html/bug-gnulib/2012-12/msg00023.html + 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: - http://lists.gnu.org/archive/html/bug-gnulib/2014-07/msg00104.html + 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 <http://trac.macports.org/ticket/41033>. - Assume DragonFly and FreeBSD will be similar. */ + for clang but remains for g++; see <https://trac.macports.org/ticket/41033>. + 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 \ |