Ok I've the same problem:
https://launchpadlibrarian.net/280573314/buildlog_ubuntu-yakkety-amd64.qtbase-opensource-src_5.6.1+dfsg-3ubuntu3~1_BUILDING.txt.gz
It seems it's something new in the last two weeks in yakkety, and not related to Qt changes. Maybe glibc 2.24 related?
Ok I've the same problem:
https:/ /launchpadlibra rian.net/ 280573314/ buildlog_ ubuntu- yakkety- amd64.qtbase- opensource- src_5.6. 1+dfsg- 3ubuntu3~ 1_BUILDING. txt.gz
It seems it's something new in the last two weeks in yakkety, and not related to Qt changes. Maybe glibc 2.24 related?