Teach the Lit configuration to actually use the cxx0x setting when

constructing compile flags, and to link against the 'rt' library on
Linux for clock_gettime and friends.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@124052 91177308-0d34-0410-b5e6-96231b3b80d8

test/lit.cfg

@@ -134,16 +134,21 @@ if libcxx_obj_root is not None:
 else:
   libcxx_obj_root = "/usr"
 
+# Configure extra compiler flags.
+compile_flags = []
+if getattr(config, 'cxx_has_stdcxx0x_flag', False):
+  compile_flags += ['-std=c++0x']
+
 # Configure extra libraries.
 libraries = []
 if sys.platform == 'darwin':
   libraries += ['-lSystem']
 if sys.platform == 'linux2':
-  libraries += ['-lgcc_eh', '-lsupc++', '-lc', '-lm', '-lgcc_s']
+  libraries += ['-lgcc_eh', '-lsupc++', '-lc', '-lm', '-lrt', '-lgcc_s']
   libraries += ['-Wl,-R', libcxx_obj_root + '/lib']
 
 config.test_format = LibcxxTestFormat(cxx_under_test,
-                                      cpp_flags = ['-nostdinc++'] + include_paths,
+                                      cpp_flags = ['-nostdinc++'] + compile_flags + include_paths,
                                       ld_flags = ['-nodefaultlibs'] + library_paths + ['-lc++'] + libraries)
 
 config.target_triple = None