The Tor Browser / file comparison
comparison: build/autoconf/hotfixes.m4
build/autoconf/hotfixes.m4
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:60b845a0b1da |
|---|---|
| 1 dnl This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 dnl dnl License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 dnl dnl file, You can obtain one at http://mozilla.org/MPL/2.0/. | |
| 4 | |
| 5 dnl Set of hotfixes to address issues in autoconf 2.13 | |
| 6 | |
| 7 dnl Divert AC_CHECK_FUNC so that the #includes it uses can't interfere | |
| 8 dnl with the function it tests. | |
| 9 dnl So, when testing e.g. posix_memalign, any #include that AC_CHECK_FUNC | |
| 10 dnl prints is replaced with: | |
| 11 dnl #define posix_memalign innocuous_posix_memalign | |
| 12 dnl #include "theinclude" | |
| 13 dnl #undef posix_memalign | |
| 14 dnl This avoids double declaration of that function when the header normally | |
| 15 dnl declares it, while the test itself is just expecting the function not to be | |
| 16 dnl declared at all, and declares it differently (which doesn't matter for the | |
| 17 dnl test itself). | |
| 18 dnl More recent versions of autoconf are essentially doing this. | |
| 19 define([ac_cv_func_], [ac_cv_func2_])dnl | |
| 20 define([_AC_CHECK_FUNC],defn([AC_CHECK_FUNC]))dnl | |
| 21 define([AC_CHECK_FUNC], [dnl | |
| 22 patsubst(_AC_CHECK_FUNC($@), [#include.*$], [#define $1 innocuous_$1 | |
| 23 \& | |
| 24 #undef $1])])dnl |
