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