Adding testing for Bug 2349 Fix

[nemanjai]

Summary

Since both Arm and PPC so far have encountered a similar issue, I propose to add this test to projects/test-suite so that other platforms can enable it to ensure they don't end up with a similar issue.

[wschmidt]

LGTM!

[nemanjai]

Committed revision 237924.

SingleSource/UnitTests/C++11/Makefile

+# SingleSource/UnitTests/C++11/Makefile
+LEVEL = ../../..
+include $(LEVEL)/Makefile.config
+
+CPPFLAGS += -std=c++11 -pthread
+
+ifdef BENCHMARKING_ONLY
+PROGRAMS_TO_SKIP += stdthreadbug
+endif
+
+LDFLAGS += -lstdc++ -pthread
+include $(LEVEL)/SingleSource/Makefile.singlesrc

SingleSource/UnitTests/C++11/stdthreadbug.cpp

+#if defined(_LITTLE_ENDIAN) && defined(__PPC64__)
+#include <thread>
+
+int main()
+{
+   std::thread t([](){});
+   t.join();
+   return 0;
+}
+#else
+int main()
+{
+  return 0;
+}
+#endif

SingleSource/UnitTests/C++11/stdthreadbug.reference_output

+exit 0

SingleSource/UnitTests/Makefile

 # SingleSource/UnitTests/Makefile
 LEVEL = ../..
 include $(LEVEL)/Makefile.config
 
 DIRS := SetjmpLongjmp
 
 # FIXME: Disable SJLJ tests for now, until EH edges are represented.
 DIRS :=
 
-DIRS += Vector 
+DIRS += Vector
 DIRS += Vectorizer
 
-DIRS += SignlessTypes Threads
+DIRS += SignlessTypes Threads C++11
 
 # Only test Obj-C on Darwin.
 ifeq ($(TARGET_OS),Darwin)
 DIRS += ObjC ObjC++
 endif
 
 # Darwin doesn't support weak/weak_import in a way that we can test in this
 # framework.