mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-31 22:25:30 +00:00
25 lines
1.1 KiB
Plaintext
25 lines
1.1 KiB
Plaintext
dnl This Source Code Form is subject to the terms of the Mozilla Public
|
|
dnl dnl License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
dnl dnl file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
|
|
dnl Set of hotfixes to address issues in autoconf 2.13
|
|
|
|
dnl Divert AC_CHECK_FUNC so that the #includes it uses can't interfere
|
|
dnl with the function it tests.
|
|
dnl So, when testing e.g. posix_memalign, any #include that AC_CHECK_FUNC
|
|
dnl prints is replaced with:
|
|
dnl #define posix_memalign innocuous_posix_memalign
|
|
dnl #include "theinclude"
|
|
dnl #undef posix_memalign
|
|
dnl This avoids double declaration of that function when the header normally
|
|
dnl declares it, while the test itself is just expecting the function not to be
|
|
dnl declared at all, and declares it differently (which doesn't matter for the
|
|
dnl test itself).
|
|
dnl More recent versions of autoconf are essentially doing this.
|
|
define([ac_cv_func_], [ac_cv_func2_])dnl
|
|
define([_AC_CHECK_FUNC],defn([AC_CHECK_FUNC]))dnl
|
|
define([AC_CHECK_FUNC], [dnl
|
|
patsubst(_AC_CHECK_FUNC($@), [#include.*$], [#define $1 innocuous_$1
|
|
\&
|
|
#undef $1])])dnl
|