Linux QOpcUa ... Library 'uacpp' is not defined.

[gfxx]

During built on QtCreator of QtOpcUa example obtain these warning.

Why these?

[Inexact] Project ERROR: You cannot build examples inside the Qt source tree, except as part of a proper Qt build.
[Inexact] Project ERROR: Library 'uacpp' is not defined.

Plus If try to run opcuaclient example obtai these error:

Failed to start program. Path or permissions wrong?

Why if opcuaviewer start (whitout see certificate perhaps).

Appreciate any help

regards

[ChrisW67]

You need to create a build directory outside the Qt source tree and use that as the place that intermediate files go. The library and/or application will end up under build_dir and you should not receive the ERROR you posted above.

mkdir build_dir
cd build_dir
qmake /path/to/example/example.pro
make