-# alloca.m4 serial 1
-dnl Copyright (C) 2002 Free Software Foundation, Inc.
+# alloca.m4 serial 4
+dnl Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
dnl This file is free software, distributed under the terms of the GNU
dnl General Public License. As a special exception to the GNU General
dnl Public License, this file may be distributed as part of a program
AC_DEFUN([gl_FUNC_ALLOCA],
[
+ dnl Work around a bug of AC_EGREP_CPP in autoconf-2.57.
+ AC_REQUIRE([AC_PROG_CPP])
+ AC_REQUIRE([AC_PROG_EGREP])
+
AC_REQUIRE([AC_FUNC_ALLOCA])
if test $ac_cv_func_alloca_works = no; then
gl_PREREQ_ALLOCA
fi
+
+ # Define an additional variable used in the Makefile substitution.
+ if test $ac_cv_working_alloca_h = yes; then
+ AC_EGREP_CPP([Need own alloca], [
+#if defined __GNUC__ || defined _AIX || defined _MSC_VER
+ Need own alloca
+#endif
+ ],
+ [AC_DEFINE(HAVE_ALLOCA, 1,
+ [Define to 1 if you have `alloca' after including <alloca.h>,
+ a header that may be supplied by this distribution.])
+ ALLOCA_H=alloca.h],
+ [ALLOCA_H=])
+ else
+ ALLOCA_H=alloca.h
+ fi
+ AC_SUBST([ALLOCA_H])
+
+ AC_DEFINE(HAVE_ALLOCA_H, 1,
+ [Define HAVE_ALLOCA_H for backward compatibility with older code
+ that includes <alloca.h> only if HAVE_ALLOCA_H is defined.])
])
# Prerequisites of lib/alloca.c.
# STACK_DIRECTION is already handled by AC_FUNC_ALLOCA.
-AC_DEFUN([gl_PREREQ_ALLOCA], [
- AC_CHECK_HEADERS_ONCE(stdlib.h string.h)
-])
+AC_DEFUN([gl_PREREQ_ALLOCA], [:])