Mercurial > gnulib
view m4/va-args.m4 @ 40244:c39a0edd90d7
fts: minor simplification
* lib/fts.c (fts_safe_changedir): Remove redundant assignment.
author | Paul Eggert <eggert@cs.ucla.edu> |
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date | Sun, 17 Mar 2019 12:39:50 -0700 |
parents | b06060465f09 |
children |
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# va-args.m4 serial 1 dnl Copyright (C) 2009-2019 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. dnl Test for variadic macro support. dnl Define HAVE_VA_ARGS if macros can use __VA_ARGS__. AC_DEFUN([gl_VA_ARGS], [ AC_CACHE_CHECK([whether the preprocessor allows variadic macros], [gl_cv_c_va_args], [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> #define a(func, arg, ...) func (arg, __VA_ARGS__) #define b(...) a (__VA_ARGS__) ]], [[b (printf, "%s", "test");]])], [gl_cv_c_va_args=yes], [gl_cv_c_va_args=no]) ]) if test $gl_cv_c_va_args = yes; then AC_DEFINE([HAVE_VA_ARGS], [1], [Define to 1 if the preprocessor supports variadic macros and __VA_ARGS__.]) fi ])