$ CC="icecc clang" CXX="icecc clang++" Tools/Scripts/build-webkit --gtk --makeargs=-j16 [...] FAILED: cd /home/devel/WebKit/WebKitBuild/Release/Source/WebCore && /usr/bin/perl -I/home/devel/WebKit/Source/WebCore/bindings/scripts /home/devel/WebKit/Source/WebCore/dom/make_names.pl --preprocessor "/usr/bin/icecc -E -x c++" --outputDir /home/devel/WebKit/WebKitBuild/Release/DerivedSources/WebCore --attrs /home/devel/WebKit/Source/WebCore/svg/svgattrs.in --tags /home/devel/WebKit/Source/WebCore/svg/svgtags.in --factory --wrapperFactory "--extraDefines= ENABLE_FILTERS=1 ENABLE_SVG_FONTS=1" If you see, the --preprocessor option uses "icecc -E" instead of "icecc clang++ -E". This is because in CMakeCache.txt: CMAKE_CXX_COMPILER:FILEPATH=/usr/bin/icecc CMAKE_CXX_COMPILER_ARG1:STRING= clang++ And in Source/cmake/OptionsCommon.cmake: set(CODE_GENERATOR_PREPROCESSOR "${CMAKE_CXX_COMPILER} -E -P -x c++")
Can you try with the procedure I documented at https://trac.webkit.org/wiki/WebKitGTK/SpeedUpBuild#Usingiceccwithclang ? It works fine for me (after r179943), using icecc+ccache+clang.
Yes, there are workarounds. Also e.g. $ ln -s /usr/bin/icecc /tmp/clang $ ln -s /usr/bin/icecc /tmp/clang++ $ CC=/tmp/clang CXX=/tmp/clang++ Tools/Scripts/build-webkit ... I opened the bug in case there was an easier way to do it, before we switched to cmake a simple CC="icecc clang" was enough.
(In reply to comment #2) > Yes, there are workarounds. Also e.g. > > $ ln -s /usr/bin/icecc /tmp/clang > $ ln -s /usr/bin/icecc /tmp/clang++ > $ CC=/tmp/clang CXX=/tmp/clang++ Tools/Scripts/build-webkit ... > > I opened the bug in case there was an easier way to do it, before we > switched to cmake a simple CC="icecc clang" was enough. I guess the problem is with invoking the CC compiler as a program with arguments (program=icecc, argument=clang) rather than just a program (by doing the trick of using symlinks and changing the PATH). I don't know if this is a bug of WebKitGTK+ or is in CMake itself. I always used the symlink+path way. Also, if you want to use icecc+ccache together, I don't see how that will work with the CC="icecc clang" method.
(In reply to comment #3) > I guess the problem is with invoking the CC compiler as a program > with arguments (program=icecc, argument=clang) rather than just a > program Exactly. > Also, if you want to use icecc+ccache together, I don't see how that > will work with the CC="icecc clang" method. I didn't want to use ccache myself, but it would be possible with the same method using the CCACHE_PREFIX variable.