[oe] [meta-qt5] qtbase-native/qmake broken for 5.10?

[Andreas Müller]

Hi,

giving Qt 5.10.0 a build I ran into the following issue detected by
meta-qt5-extra/sddm build failure:

Running native 'qmake -query' outputs

| qmake -query
| Empty filename passed to function
| QT_SYSROOT:/home/superandy/tmp/oe-core-glibc/work/x86_64-linux/qtbase-native/5.10.0+gitAUTOINC+50117d738a-r0/recipe-sysroot-native
| ...

ask for a certain property e.g QT_INSTALL_IMPORTS (this is what sddm
does during build):

| qmake -query QT_INSTALL_IMPORTS
| Empty filename passed to function
| /home/superandy/tmp/oe-core-glibc/work/x86_64-linux/qtbase-native/5.10.0+gitAUTOINC+50117d738a-r0/recipe-sysroot-native/home/superandy/tmp/oe-core-glibc/work/x86_64-linux/qtbase-native/5.10.0+gitAUTOINC+50117d738a-r0/recipe-sysroot-native/usr/lib/qt5/imports

First line always reports 'Empty filename passed to function' which is
not exactly useful when expecting a path.

I've searched the web without success for this so I decided to start
debugging. Due to standard optimization most interesting variables are
optimized out :(

So before I rebuild qtbase-native without optimization and debug again
I thought there might be someone here knowing something helpful
regarding this issue.

Thanks in advance

Andreas