[mp-units] Add feature to use ms-gsl or gsl-lite
wongjk opened this issue · comments
Is your feature request related to a problem? Please describe.
A project of mine uses ms-gsl, which will conflict with the gsl-lite dependency in mp-units.
Proposed solution
Add a feature choose between ms-gsl and gsl-lite.
Describe alternatives you've considered
No response
Additional context
No response
Add a feature choose between ms-gsl and gsl-lite.
There can't be such a feature. https://learn.microsoft.com/en-us/vcpkg/contributing/maintainer-guide#do-not-use-features-to-implement-alternatives
I see. I will have to use an overlay port then.
Thank you,
Do I understand correctly that we already have two alternative implmentations of the GSL which cannot be used at the same time? Maybe we don't need a feature but must force all ports to use the same variant. AFAIU the ban of alternatives is intented to prevent the situation which is reported here.
Do I understand correctly that we already have two alternative implmentations of the GSL which cannot be used at the same time?
Yes. Both ms-gsl and gsl-lite define things under the gsl namespace, which causes type conflicts and ODR violations.
It seems like only one of them should be used in vcpkg.