Barcode in windows

[polpol]

I have succesfully run qtRPT report with barcode in linux, both as library and with static linking.
For win it crashes the program no matter if I add RPT as static or dynamic library.
I tried both approaches - compiling the code under windows and usinc MXE cross compiling under linux.
Both solutions fail.
It seams like the zint library loads fine beause if I delete the dll windows complains on program startup.

[polpol]

one more lessons - in case somebody has simillar problem.
Even though I selecter QtRPT to be compiled as library it seames it's liked statically . The reason for windows version crashing was the qtrpt.dll file. WHen I deleted that it no longer crashes.
Still the crosscompiled qtzint.dll is there but no barcode on the preview

[polpol]

Further updates. with dynamically linked Qt and compilation inside Windows all works ok.
Somehow the crosscompiled (MXE) library - qtZint.dll is crashing the whole app on loading in windows.

When I run the program under wine I can find some trace
I added some debug messages in BarCode::BarCode
and I can see them after trying to generate the report
"BARCODE constructed
qtzint loaded"

but then I get
QGuiApplication::font(): no QGuiApplication instance and no application font set.
and a crash
The error happens in BarCode::drawBarcode
at
bc->render(*painter,QRectF(x,y,width,height), Zint::QZint::KeepAspectRatio);