It seems extra compiler flags isn't passed for all target now. I found it when I tried to add back c++11 features and EFL build failed - https://bugs.webkit.org/show_bug.cgi?id=119266 I'm going to collect which targets are still missing and try to fix.
I checked the full EFL build.log and found that "-std=gnu++0x" isn't passed to the following targets: - Tools/DumpRenderTree/TestNetscapePlugin - Tools/DumpRenderTree/efl - Tools/ImageDiff - Tools/TestWebKitAPI - Source/cmake/gtest - Source/JavaScriptCore/llint/LLIntOffsetExtractor.cpp - Source/JavaScriptCore/shell (jsc.cpp) - Source/WebKit/efl/tests - Source/WebKit2/UIProcess/API/efl/tests - Source/WebKit2/UIProcess/API/efl/tests
Fixed by http://trac.webkit.org/changeset/155163 *** This bug has been marked as a duplicate of bug 120812 ***