Created attachment 6601 [details] Patch Qt3Support module has a runtime dependency on QtSql.
Indeed, according to https://wiki.qt.io/Qt_Library_Cross_Dependencies, Qt3Support relies on QtSql. So I've applied your patch. However, according to https://wiki.qt.io/Qt_Library_Cross_Dependencies, Qt3Support also requires: * QtGui: this is already handled by Buildroot * QtNetwork: this is already a dependency of QtGui, so OK * QtXml: this one I don't see where we take care of it. Could you double check this, and send a follow-up patch if needed? Also, please send your patches to the mailing list next time. Thanks!
(In reply to Thomas Petazzoni from comment #1) I choose QtXml module manually, so did not notice that in its absence there is any error.(In reply to Thomas Petazzoni from comment #1)