Enterprise linux #286 and mac #220 installers are missing .la files, not all but some of those, for example (random pick-ups from test log):
mac:
present: clang_64/lib/libQt5UiTools.la
missing: clang_64/lib/QtCLucene.la

linux:
present: gcc_64/lib/libQt5Core.la
missing: gcc_64/lib/libQt5CLucene.la

EDIT:
The .la's are missing also from all android builds (linux, mac, win).