| #*************************************************************************** |
| # _ _ ____ _ |
| # Project ___| | | | _ \| | |
| # / __| | | | |_) | | |
| # | (__| |_| | _ <| |___ |
| # \___|\___/|_| \_\_____| |
| # |
| # Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al. |
| # |
| # This software is licensed as described in the file COPYING, which |
| # you should have received as part of this distribution. The terms |
| # are also available at https://curl.se/docs/copyright.html. |
| # |
| # You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| # copies of the Software, and permit persons to whom the Software is |
| # furnished to do so, under the terms of the COPYING file. |
| # |
| # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| # KIND, either express or implied. |
| # |
| # SPDX-License-Identifier: curl |
| # |
| ########################################################################### |
| #*************************************************************************** |
| #*************************************************************************** |
| |
| # File version for 'aclocal' use. Keep it a single number. |
| # serial 7 |
| |
| dnl CURL_OVERRIDE_AUTOCONF |
| dnl ------------------------------------------------- |
| dnl Placing a call to this macro in configure.ac after |
| dnl the one to AC_INIT will make macros in this file |
| dnl visible to the rest of the compilation overriding |
| dnl those from Autoconf. |
| |
| AC_DEFUN([CURL_OVERRIDE_AUTOCONF], [ |
| AC_BEFORE([$0],[AC_PROG_LIBTOOL]) |
| # using curl-override.m4 |
| ]) |
| |
| dnl Override Autoconf's AC_LANG_PROGRAM (C) |
| dnl ------------------------------------------------- |
| dnl This is done to prevent compiler warning |
| dnl 'function declaration isn't a prototype' |
| dnl in function main. This requires at least |
| dnl a c89 compiler and does not support K&R. |
| |
| m4_define([AC_LANG_PROGRAM(C)], |
| [$1 |
| int main (void) |
| { |
| $2 |
| ; |
| return 0; |
| }]) |
| |
| dnl Override Autoconf's AC_LANG_CALL (C) |
| dnl ------------------------------------------------- |
| dnl This is a backport of Autoconf's 2.60 with the |
| dnl embedded comments that hit the resulting script |
| dnl removed. This is done to reduce configure size |
| dnl and use fixed macro across Autoconf versions. |
| |
| m4_define([AC_LANG_CALL(C)], |
| [AC_LANG_PROGRAM([$1 |
| m4_if([$2], [main], , |
| [ |
| #ifdef __cplusplus |
| extern "C" |
| #endif |
| char $2 ();])], [return $2 ();])]) |
| |
| dnl Override Autoconf's AC_LANG_FUNC_LINK_TRY (C) |
| dnl ------------------------------------------------- |
| dnl This is a backport of Autoconf's 2.60 with the |
| dnl embedded comments that hit the resulting script |
| dnl removed. This is done to reduce configure size |
| dnl and use fixed macro across Autoconf versions. |
| |
| m4_define([AC_LANG_FUNC_LINK_TRY(C)], |
| [AC_LANG_PROGRAM( |
| [ |
| #define $1 innocuous_$1 |
| #ifdef __STDC__ |
| # include <limits.h> |
| #else |
| # include <assert.h> |
| #endif |
| #undef $1 |
| #ifdef __cplusplus |
| extern "C" |
| #endif |
| char $1 (); |
| #if defined __stub_$1 || defined __stub___$1 |
| choke me |
| #endif |
| ], [return $1 ();])]) |