| dnl -------------------------------------------------------------------------- |
| dnl PA_VARIADIC_MACROS |
| dnl |
| dnl Check to see if the compiler supports C99 variadic macros. |
| dnl -------------------------------------------------------------------------- |
| AC_DEFUN([PA_VARIADIC_MACROS], |
| [AC_CACHE_CHECK([if $CC supports variadic macros], [pa_cv_variadic_macros], |
| [AC_LINK_IFELSE([AC_LANG_SOURCE([ |
| AC_INCLUDES_DEFAULT |
| #define myprintf(f, ...) printf(f, __VA_ARGS__) |
| int main(void) |
| { |
| myprintf("%s", "Hello, World!\n"); |
| return 0; |
| } |
| ])],[pa_cv_variadic_macros=yes],[pa_cv_variadic_macros=no])]) |
| AS_IF([test "x$pa_cv_variadic_macros" = xyes], |
| [AC_DEFINE([HAVE_VARIADIC_MACROS], 1, |
| [define to 1 if your compiler supports C99 __VA_ARGS__ variadic macros.])]) |
| ]) |
