FontConfig support built, but QT_QPA_FONTDIR still required
I'm building Qt-5.7.1 from source on Ubuntu 14.04 with FontConfig support (which appears to be detected and correctly enabled by configure)
Support enabled for: ... FontConfig ............. yes
but running apps against the build always fail with
QFontDatabase: Cannot find font directory /opt/Qt-5.7/lib/fonts.
unless overridden with an explicit QT_QPA_FONTDIR pointing at system truetype fonts. I may have misunderstood, but I assumed building FontConfig support would do this transparently. Any pointers to what I've missed or misunderstood?