build/autoconf/hotfixes.m4@141e0f1194b1 (annotated)
build/autoconf/hotfixes.m4
Wed, 31 Dec 2014 07:16:47 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 07:16:47 +0100
- branch
- TOR_BUG_9701
- changeset 3
- 141e0f1194b1
- permissions
- -rw-r--r--
Revert simplistic fix pending revisit of Mozilla integration attempt.
| michael@0 | 1 | dnl This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | dnl dnl License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | dnl dnl file, You can obtain one at http://mozilla.org/MPL/2.0/. |
| michael@0 | 4 | |
| michael@0 | 5 | dnl Set of hotfixes to address issues in autoconf 2.13 |
| michael@0 | 6 | |
| michael@0 | 7 | dnl Divert AC_CHECK_FUNC so that the #includes it uses can't interfere |
| michael@0 | 8 | dnl with the function it tests. |
| michael@0 | 9 | dnl So, when testing e.g. posix_memalign, any #include that AC_CHECK_FUNC |
| michael@0 | 10 | dnl prints is replaced with: |
| michael@0 | 11 | dnl #define posix_memalign innocuous_posix_memalign |
| michael@0 | 12 | dnl #include "theinclude" |
| michael@0 | 13 | dnl #undef posix_memalign |
| michael@0 | 14 | dnl This avoids double declaration of that function when the header normally |
| michael@0 | 15 | dnl declares it, while the test itself is just expecting the function not to be |
| michael@0 | 16 | dnl declared at all, and declares it differently (which doesn't matter for the |
| michael@0 | 17 | dnl test itself). |
| michael@0 | 18 | dnl More recent versions of autoconf are essentially doing this. |
| michael@0 | 19 | define([ac_cv_func_], [ac_cv_func2_])dnl |
| michael@0 | 20 | define([_AC_CHECK_FUNC],defn([AC_CHECK_FUNC]))dnl |
| michael@0 | 21 | define([AC_CHECK_FUNC], [dnl |
| michael@0 | 22 | patsubst(_AC_CHECK_FUNC($@), [#include.*$], [#define $1 innocuous_$1 |
| michael@0 | 23 | \& |
| michael@0 | 24 | #undef $1])])dnl |
