1# func.m4 serial 2 2dnl Copyright (C) 2008-2020 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7# Written by Simon Josefsson 8 9AC_DEFUN([gl_FUNC], 10[ 11 AC_CACHE_CHECK([whether __func__ is available], [gl_cv_var_func], 12 AC_COMPILE_IFELSE( 13 [AC_LANG_PROGRAM([[]], [[const char *str = __func__;]])], 14 [gl_cv_var_func=yes], 15 [gl_cv_var_func=no])) 16 if test "$gl_cv_var_func" != yes; then 17 AC_DEFINE([__func__], ["<unknown function>"], 18 [Define as a replacement for the ISO C99 __func__ variable.]) 19 fi 20]) 21