building QtWebEngine with Intel compilers?

I am trying to build Qt5 with WebEngine enabled using Intel compilers (2018.1.163).

I noticed that in qtwebengine/mkspecs/features/platform.prf there is a hard check that disables building of WebEngine when Intel compilers are being used:

linux {
  if(!gcc:!clang)|intel_icc {
    skipBuild("Qt WebEngine on Linux requires clang or GCC.")
    return(false)
  }
  ...

I'm (perhaps naively) trying anyway, and with the help of the patch file available at https://github.com/easybuilders/easybuild-easyconfigs/pull/7010/files I seem to be getting quite far, but the compilation dies at some point with a spurious "undefined reference" linking error.

Is there any more information available on why building of WebEngine is disabled with Intel compilers?