From: Francis Dupont <fdupont@isc.org>
Date: Thu, 26 Sep 2019 12:48:56 +0000 (+0200)
Subject: [918-check-c-11-thread-support-in-configure] Added check for condition variable
X-Git-Tag: tmark-pre-35~10
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=baf4097520c1cd38366ee4f33a95dde040906e9e;p=thirdparty%2Fkea.git

[918-check-c-11-thread-support-in-configure] Added check for condition variable
---

diff --git a/m4macros/ax_cpp11.m4 b/m4macros/ax_cpp11.m4
index 444b773099..a63ea5e93b 100644
--- a/m4macros/ax_cpp11.m4
+++ b/m4macros/ax_cpp11.m4
@@ -200,6 +200,19 @@ for retry in "none" "--std=c++11" "--std=c++0x" "--std=c++1x" "fail"; do
 		[AC_MSG_RESULT([no])
 		 continue])
 			 
+	AC_MSG_CHECKING(condition variable support)
+	feature="condition variable"
+	AC_COMPILE_IFELSE(
+		[AC_LANG_PROGRAM(
+			[#include <condition_variable>
+			 std::mutex mtx;
+			 std::condition_variable cv;],
+			[std::lock_guard<std::mutex> lock(mtx);
+			 cv.notify_one();])],
+		[AC_MSG_RESULT([yes])],
+		[AC_MSG_RESULT([no])
+		 continue])
+			 
 	AC_MSG_CHECKING(atomic support)
 	feature="atomic"
 	AC_COMPILE_IFELSE(