1# alloca.m4 serial 5 2dnl Copyright (C) 2002, 2003, 2004 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 if test $ac_cv_working_alloca_h = yes; then 20 AC_EGREP_CPP([Need own alloca], [ 21#if defined __GNUC__ || defined _AIX || defined _MSC_VER 22 Need own alloca 23#endif 24 ], 25 [AC_DEFINE(HAVE_ALLOCA, 1, 26 [Define to 1 if you have `alloca' after including <alloca.h>, 27 a header that may be supplied by this distribution.]) 28 ALLOCA_H=alloca.h], 29 [ALLOCA_H=]) 30 else 31 ALLOCA_H=alloca.h 32 fi 33 AC_SUBST([ALLOCA_H]) 34 35 AC_DEFINE(HAVE_ALLOCA_H, 1, 36 [Define HAVE_ALLOCA_H for backward compatibility with older code 37 that includes <alloca.h> only if HAVE_ALLOCA_H is defined.]) 38]) 39 40# Prerequisites of lib/alloca.c. 41# STACK_DIRECTION is already handled by AC_FUNC_ALLOCA. 42AC_DEFUN([gl_PREREQ_ALLOCA], [:]) 43