Tests: Make CompileFeature tests use highest standard known.

Remove the use of check_cxx_source_compiles which is now just getting in
the way.

Blacklist the cxx_alignof feature in the test with GNU 4.7. The test
file compiles, but it is documented as available first in GNU 4.8.

1 files changed, 10 insertions, 0 deletions

diff --git a/Tests/CompileFeatures/feature_test.cpp b/Tests/CompileFeatures/feature_test.cpp
new file mode 100644
index 0000000..4406c16
--- /dev/null
+++ b/Tests/CompileFeatures/feature_test.cpp
@@ -0,0 +1,10 @@
+
+#define STRINGIFY_IMPL(X) #X
+#define STRINGIFY(X) STRINGIFY_IMPL(X)
+
+#include STRINGIFY(TEST)
+
+int main()
+{
+  return 0;
+}