CMake: Fix various bugs in check_01_cxx_features

This commit fixes a typo of the "-std=c++0x" fallback found by Chad Balen
(mailing list).

Furthermore, the fallback logic was also broken (as reported by Wolfgang).

diff --git a/cmake/checks/check_01_cxx_features.cmake b/cmake/checks/check_01_cxx_features.cmake
index f464702949f2bfaf69a44f46578b80a087f2ce2a..94c57fd104313e380ed37e52ea5dde210cf729d9 100644 (file)
--- a/cmake/checks/check_01_cxx_features.cmake
+++ b/cmake/checks/check_01_cxx_features.cmake
@@ -1,7 +1,7 @@
 ## ---------------------------------------------------------------------
 ## $Id$
 ##
-## Copyright (C) 2012 - 2013 by the deal.II authors
+## Copyright (C) 2012 - 2014 by the deal.II authors
 ##
 ## This file is part of the deal.II library.
 ##
@@ -40,12 +40,12 @@
 IF(NOT DEFINED DEAL_II_WITH_CXX11 OR DEAL_II_WITH_CXX11)
 
   IF("${DEAL_II_CXX11_FLAG}" STREQUAL "")
+    CHECK_CXX_COMPILER_FLAG("-std=c++0x" DEAL_II_HAVE_FLAG_stdcxx0x)
     CHECK_CXX_COMPILER_FLAG("-std=c++11" DEAL_II_HAVE_FLAG_stdcxx11)
     IF(DEAL_II_HAVE_FLAG_stdcxx11)
       SET(DEAL_II_CXX11_FLAG "-std=c++11")
-    ELSEIF(DEAL_II_HAVE_FLAG_stdcxx11)
-      CHECK_CXX_COMPILER_FLAG("-std=c++0x" DEAL_II_HAVE_FLAG_stdcxx0x)
-      SET(DEAL_II_CXX11_FLAG "-std=x++0x")
+    ELSEIF(DEAL_II_HAVE_FLAG_stdcxx0x)
+      SET(DEAL_II_CXX11_FLAG "-std=c++0x")
     ENDIF()
   ENDIF()