From: Anton Mitrofanov <BugMaster@narod.ru>
Date: Thu, 8 Nov 2018 19:01:54 +0000 (+0300)
Subject: configure: Fix log2f misdetection on some systems
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d6af823959dc06f061e0a7b038dab83d9c1c9ea3;p=libx264

configure: Fix log2f misdetection on some systems

Bug report by Dirk Fieldhouse.
---

diff --git a/configure b/configure
index 07ba4490..3cf63e09 100755
--- a/configure
+++ b/configure
@@ -1067,7 +1067,7 @@ if [ "$thread" = "posix" ]; then
 fi
 [ "$thread" != "no" ] && define HAVE_THREAD
 
-if cc_check 'math.h' '' 'log2f(2);' ; then
+if cc_check 'math.h' '' 'volatile float x = 2; return log2f(x);' ; then
     define HAVE_LOG2F
 fi