Compilation fails if using ninja together with icecream and cmake > 3.5. It's because we turn on the response files support (because of bug 129771) in Source/cmake/OptionsCommon.cmake (by enabling CMAKE_NINJA_FORCE_RESPONSE_FILE), but the icecream compiler it not processing the response files correctly, and it's not passing compiler flags from the response files to the compiler (in our case it's -fPIC). The compilation succeeds with cmake <= 3.5, because the support for the ninja's response files was added in 3.6. For more information see the cmake bug https://gitlab.kitware.com/cmake/cmake/issues/16664 the issue was reported to icecream as well https://github.com/icecc/icecream/issues/188. In the meantime we should turn off the response files support if using cmake > 3.5 together with ninja generator and icecream.
Created attachment 302502 [details]
Comment on attachment 302502 [details]
Clearing flags on attachment: 302502
Committed r212882: <http://trac.webkit.org/changeset/212882>
All reviewed patches have been landed. Closing bug.