These patches are for qtwebengine-everywhere-src-5.12.3.tar.xz, SHA256: 3ff3bac12d75aa0f3fd993bb7077fe411f7b0e6a3993af6f8b039d48e3dc4317
Linking stage for QtWebEngineCore requires 10+GB of RAM :) (debug build)
Additional stuff needed:
Fixed libxslt.pc (non-packaged/develop/lib/pkgconfig) - qmake checks if directories in .pc files exist and will fail with some libs if libxslt was built with libxml2-2.6.2 and libxml2 was later updated to let's say libxml2-2.9.9, libxslt.pc will contain -L with non-existent directory (because it was not rebuilt with newer libxml2) Custom .pc file fixes this.