[Development] Problems with QtWebKit 5.6 / Please do not remove QtWebkit from 5.6 official binaries

[René J. V. Bertin]

I think I have a lead on my issue, but I don't really know yet how to follow it.

As it turns out, the following sequence succeeds:

- checkout qtwebkit.git
- (cd qtwebkit.git ; syncqt.pl Source -version 5.6.0)
- mkdir build ; cd build
- qmake ../qtwebkit.git/WebKit.pro
- make -j4

The goal is to run this sequence as part of a MacPorts build script 
("Portfile"). Portfiles are written in Tcl and run with a specific, restricted 
environment designed to reduce the likelihood of finding stuff outside the 
MacPorts prefix that also exists under that prefix.

The last 2 commands above were run with basically the same environment, except 
for a few compiler flags MacPorts adds.

The qtwebkit build as part of "monolithic" build I mentioned earlier was run 
from a Portfile and thus subject to the same environment as the failing 
standalone builds.

I guess I'll have to do some more test builds (@ over 45 min a piece...) and 
compare full logs if I want to get to the bottom of this.

R.