From 79cd3d7b8a53dcb6bd2e32025b1c44fe5cd99b7c Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Sat, 21 May 2016 21:26:25 +0200
Subject: Check for linkage against libatomic and librt.

---
 configure.ac | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index d35887a..6c85c0f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -20,7 +20,6 @@ dnl ===========================
 AC_LANG_PUSH([C++])
 TMP_CXXFLAGS="$CXXFLAGS"
 CXXFLAGS=-std=c++11
-LDFLAGS=-lrt
 AC_MSG_CHECKING([whether CXX supports -std=c++11])
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
 	[AC_MSG_RESULT([yes])],
@@ -463,6 +462,31 @@ AS_IF([test x$enable_resampler == xsrc],
        )]
 )
 
+dnl ======================
+dnl Check for the rt library
+dnl ======================
+AC_HAVE_LIBRARY([rt],[],[])
+
+dnl ======================
+dnl Check for the atomic library
+dnl ======================
+AC_LINK_IFELSE(
+    [AC_LANG_SOURCE[
+      #include <atomic>
+      int main() {
+        struct Test { int val; };
+        std::atomic<Test> s;
+        s.is_lock_free();
+      }
+    ]],
+    [libatomic=yes],
+    [libatomic=no])
+
+if test "$libatomic" = no; then
+  AC_HAVE_LIBRARY([atomic],[],[AC_MSG_ERROR(
+                  [Please install the GNU Atomic library])])
+fi
+
 dnl ======================
 dnl Check for the pthread library
 dnl ======================
-- 
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