| # alloca.m4 serial 5 |
| dnl Copyright (C) 2002-2003, 2006, 2011, 2021-2022 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. |
| |
| 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. |
| |
| AC_EGREP_CPP([Need own alloca], [ |
| #if defined __GNUC__ || defined _MSC_VER || !HAVE_ALLOCA_H |
| Need own alloca |
| #endif |
| ], |
| [GL_GENERATE_ALLOCA_H=true], |
| [GL_GENERATE_ALLOCA_H=false]) |
| ]) |
| |
| # 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) |
| : |
| ]) |
