Comment 4 for bug 1215414

Dmitry: No, that patch was actually dropped since seemingly it was merged upstream.

I considered it and many other upstream changes, but eventually did not find any single commit to revert to fix the issue. I found the place where it could be fixed, and overrode the upstream logic by setting the qt5_MODULE_install_prefix equal to QT_INSTALL_PREFIX. That's also one of the options in the upstream logic, but somehow something else got selected now in 5.1.1, unlike in 5.1.

This forcing in qtbase seems to address the issue, I've been now rebuilding all the 5.1.1 modules in qt5-beta2 and at least the initial CMake using projects I found failing now all build fine. Let's hope that's all that there is to it.