Make sure -fPIC can be expected to work before testing it.
Merge topic 'test-export-iface-genex' into next

cf7516a Make sure -fPIC can be expected to work before testing it.
Export the INTERFACE_PIC property.
Test evaluation target via export for generator expressions
Merge topic 'test-export-iface-genex' into next

5693ae5 Test evaluation target via export for generator expressions
71d7bf8 Export the INTERFACE_PIC property.