raise errors for invalid options passed by the user

[trontrytel]

Right now they are silently ignored. Which is not good at all :)

[zengqingwei519]

Dear Anna,
Could you kindly help me to solve this compile error?
Thank you very much!
Best!
Q. W. Zeng

[trontrytel]

Hi @zengqingwei519. You should be contacting @pdziekan - he is the main developer of this project right now.
To me it looks like you are using gcc 7.3 which should be good enough for the C++14 requirement. It is strange that cmake doesn't have the access to your build folder. Maybe thats the issue here?

Best!

[mwarusz]

I second the hunch that permissions are the issue here. The way that the C++14 check is done is by
making a temporary source file and trying to compile it, hence if the file creation fails the check will fail.