From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- build/autoconf/hotfixes.m4 | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 build/autoconf/hotfixes.m4 (limited to 'build/autoconf/hotfixes.m4') diff --git a/build/autoconf/hotfixes.m4 b/build/autoconf/hotfixes.m4 new file mode 100644 index 000000000..9c8362041 --- /dev/null +++ b/build/autoconf/hotfixes.m4 @@ -0,0 +1,23 @@ +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_CHECK_FUNC],defn([AC_CHECK_FUNC]))dnl +define([AC_CHECK_FUNC], [dnl +patsubst(_AC_CHECK_FUNC($@), [#include.*$], [#define $1 innocuous_$1 +\& +#undef $1])])dnl -- cgit v1.2.3