[CMake] CTest's Build exit status

[Marcel Loose]

Hi all,

I noticed that 'ctest -DExperimentalBuild' returns with an exit status
0, even if compiler errors occur. I think that is caused by the fact
that 'make -i' is used. The "ignore errors" option causes make to always
exit with status 0. 

Wouldn't it make more sense to use 'make -k' instead? The "keep going"
option tries to build as much as possible, but won't try to build
targets that depend on sources that failed to compile. Furthermore, and
more importantly, 'make -k' will return with an exit status unequal to
0, if compiler errors occurred. 

Best regards,
Marcel Loose.