diff options
Diffstat (limited to 'm4/gnulib-common.m4')
| -rw-r--r-- | m4/gnulib-common.m4 | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4 index 20ce40e7441..1bb316bb157 100644 --- a/m4/gnulib-common.m4 +++ b/m4/gnulib-common.m4 @@ -1,4 +1,4 @@ -# gnulib-common.m4 serial 34 +# gnulib-common.m4 serial 35 dnl Copyright (C) 2007-2014 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -49,6 +49,15 @@ AC_DEFUN([gl_COMMON_BODY], [ is a misnomer outside of parameter lists. */ #define _UNUSED_PARAMETER_ _GL_UNUSED +/* gcc supports the "unused" attribute on possibly unused labels, and + g++ has since version 4.5. */ +#if !defined __cplusplus || __GNUC__ > 4 \ + || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) +# define _GL_UNUSED_LABEL _GL_UNUSED +#else +# define _GL_UNUSED_LABEL +#endif + /* The __pure__ attribute was added in gcc 2.96. */ #if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 96) # define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__)) |