diff options
Diffstat (limited to 'm4/vamacros.m4')
| -rw-r--r-- | m4/vamacros.m4 | 56 |
1 files changed, 37 insertions, 19 deletions
diff --git a/m4/vamacros.m4 b/m4/vamacros.m4 index 8946d8b..855bb40 100644 --- a/m4/vamacros.m4 +++ b/m4/vamacros.m4 @@ -1,5 +1,4 @@ -dnl vamacros.m4 -- Check for support for variadic macros. -dnl $Id$ +dnl Check for support for variadic macros. dnl dnl This file defines two macros for probing for compiler support for variadic dnl macros. Provided are RRA_C_C99_VAMACROS, which checks for support for the @@ -15,30 +14,49 @@ dnl dnl They set HAVE_C99_VAMACROS or HAVE_GNU_VAMACROS as appropriate. dnl dnl Written by Russ Allbery <rra@stanford.edu> -dnl Copyright 2006, 2008 Board of Trustees, Leland Stanford Jr. University +dnl Copyright 2006, 2008, 2009 +dnl Board of Trustees, Leland Stanford Jr. University dnl dnl See LICENSE for licensing terms. +AC_DEFUN([_RRA_C_C99_VAMACROS_SOURCE], [[ +#include <stdio.h> +#define error(...) fprintf(stderr, __VA_ARGS__) + +int +main(void) { + error("foo"); + error("foo %d", 0); + return 0; +} +]]) + AC_DEFUN([RRA_C_C99_VAMACROS], [AC_CACHE_CHECK([for C99 variadic macros], [rra_cv_c_c99_vamacros], -[AC_TRY_COMPILE( -[#include <stdio.h> -#define error(...) fprintf(stderr, __VA_ARGS__)], - [error("foo"); error("foo %d", 0); return 0;], - [rra_cv_c_c99_vamacros=yes], - [rra_cv_c_c99_vamacros=no])]) -AS_IF([test $rra_cv_c_c99_vamacros = yes], + [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_RRA_C_C99_VAMACROS_SOURCE])], + [rra_cv_c_c99_vamacros=yes], + [rra_cv_c_c99_vamacros=no])]) + AS_IF([test x"$rra_cv_c_c99_vamacros" = xyes], [AC_DEFINE([HAVE_C99_VAMACROS], 1, - [Define if the compiler supports C99 variadic macros.])])]) + [Define if the compiler supports C99 variadic macros.])])]) + +AC_DEFUN([_RRA_C_GNU_VAMACROS_SOURCE], [[ +#include <stdio.h> +#define error(args...) fprintf(stderr, args) + +int +main(void) { + error("foo"); + error("foo %d", 0); + return 0; +} +]]) AC_DEFUN([RRA_C_GNU_VAMACROS], [AC_CACHE_CHECK([for GNU-style variadic macros], [rra_cv_c_gnu_vamacros], -[AC_TRY_COMPILE( -[#include <stdio.h> -#define error(args...) fprintf(stderr, args)], - [error("foo"); error("foo %d", 0); return 0;], - [rra_cv_c_gnu_vamacros=yes], - [rra_cv_c_gnu_vamacros=no])]) -AS_IF([test $rra_cv_c_gnu_vamacros = yes], + [AC_COMPILE_IFELSE([AC_LANG_SOURCE([_RRA_C_GNU_VAMACROS_SOURCE])], + [rra_cv_c_gnu_vamacros=yes], + [rra_cv_c_gnu_vamacros=no])]) + AS_IF([test x"$rra_cv_c_gnu_vamacros" = xyes], [AC_DEFINE([HAVE_GNU_VAMACROS], 1, - [Define if the compiler supports GNU-style variadic macros.])])]) + [Define if the compiler supports GNU-style variadic macros.])])]) |