build-webkit --64-bit --release fails with: -- Checking for module 'icu-uc' -- Found icu-uc, version 63.1 CMake Error at Source/cmake/FindICU.cmake:106 (message): Could not find ICU Call Stack (most recent call first): Source/cmake/OptionsWin.cmake:153 (find_package) Source/cmake/OptionsAppleWin.cmake:5 (include) Source/cmake/WebKitCommon.cmake:59 (include) CMakeLists.txt:157 (include) It appears we do not have 64bit libraries in the WebKitLibraries SDK.
I believe we will need to update the WebKitSupportLibraries.zip file found at https://developer.apple.com/opensource/internet/webkit_sptlib_agree.html