1# alloca.m4 serial 4 (gettext-0.18.2) 2dnl Copyright (C) 2002-2003, 2006, 2011 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 7AC_DEFUN([gl_FUNC_ALLOCA], 8[ 9 dnl Work around a bug of AC_EGREP_CPP in autoconf-2.57. 10 AC_REQUIRE([AC_PROG_CPP]) 11 AC_REQUIRE([AC_PROG_EGREP]) 12 13 AC_REQUIRE([AC_FUNC_ALLOCA]) 14 if test $ac_cv_func_alloca_works = no; then 15 gl_PREREQ_ALLOCA 16 fi 17 18 # Define an additional variable used in the Makefile substitution. 19 20 AC_EGREP_CPP([Need own alloca], [ 21#if defined __GNUC__ || defined _MSC_VER || !HAVE_ALLOCA_H 22 Need own alloca 23#endif 24 ], 25 ALLOCA_H=alloca.h, 26 ALLOCA_H=) 27 AC_SUBST([ALLOCA_H]) 28 AM_CONDITIONAL([GL_GENERATE_ALLOCA_H], [test -n "$ALLOCA_H"]) 29]) 30 31# Prerequisites of lib/alloca.c. 32# STACK_DIRECTION is already handled by AC_FUNC_ALLOCA. 33AC_DEFUN([gl_PREREQ_ALLOCA], [ 34 AC_CHECK_HEADERS_ONCE(stdlib.h string.h) 35 : 36]) 37