| # stdarg.m4 serial 1 |
| dnl Copyright (C) 2006 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 From Bruno Haible. |
| dnl Provide a working va_copy in combination with <stdarg.h>. |
| |
| AC_DEFUN([gl_STDARG_H], |
| [ |
| AC_MSG_CHECKING([for va_copy]) |
| AC_CACHE_VAL([gl_cv_func_va_copy], [ |
| AC_TRY_COMPILE([#include <stdarg.h>], [ |
| #ifndef va_copy |
| void (*func) (va_list, va_list) = va_copy; |
| #endif |
| ], |
| [gl_cv_func_va_copy=yes], [gl_cv_func_va_copy=no])]) |
| AC_MSG_RESULT([$gl_cv_func_va_copy]) |
| if test $gl_cv_func_va_copy = no; then |
| # Provide a substitute, either __va_copy or as a simple assignment. |
| AC_CACHE_VAL([gl_cv_func___va_copy], [ |
| AC_TRY_COMPILE([#include <stdarg.h>], [ |
| #ifndef __va_copy |
| error, bail out |
| #endif |
| ], |
| [gl_cv_func___va_copy=yes], [gl_cv_func___va_copy=no])]) |
| if test $gl_cv_func___va_copy = yes; then |
| AC_DEFINE([va_copy], [__va_copy], |
| [Define as a macro for copying va_list variables.]) |
| else |
| AH_VERBATIM([gl_VA_COPY], [/* A replacement for va_copy, if needed. */ |
| #define gl_va_copy(a,b) ((a) = (b))]) |
| AC_DEFINE([va_copy], [gl_va_copy], |
| [Define as a macro for copying va_list variables.]) |
| fi |
| fi |
| ]) |
