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+# func.m4 serial 2
+dnl Copyright (C) 2008-2023 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.
+
+# Written by Simon Josefsson
+
+AC_DEFUN([gl_FUNC],
+[
+ AC_CACHE_CHECK([whether __func__ is available], [gl_cv_var_func],
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[]], [[const char *str = __func__;]])],
+ [gl_cv_var_func=yes],
+ [gl_cv_var_func=no]))
+ if test "$gl_cv_var_func" != yes; then
+ AC_DEFINE([__func__], ["<unknown function>"],
+ [Define as a replacement for the ISO C99 __func__ variable.])
+ fi
+])