configurejson2cmake.py: Don't emit a fixme for C++11 config

Change-Id: I8408f6126115a0f76b0fed2cc42b54e5c148821d
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

src/corelib/configure.cmake

@@ -59,8 +59,7 @@ test(fptr);
     /* END TEST: */
     return 0;
 }
-"# FIXME: qmake: CONFIG += c++11
-)
+")
 
 # clock-monotonic
 qt_config_compile_test(clock_monotonic

util/cmake/configurejson2cmake.py

@@ -619,6 +619,9 @@ def parseTest(ctx, test, data, cm_fh):
                 cm_fh.write("if (LINUX)\n")
                 cm_fh.write("    set(" + librariesCmakeName + " pthread rt)\n")
                 cm_fh.write("endif()\n")
+            elif details["qmake"] == "CONFIG += c++11":
+                # do nothing we're always in c++11 mode
+                pass
             else:
                 qmakeFixme = "# FIXME: qmake: {}\n".format(details["qmake"])