cannot set the compiler per dependency

[paskino]

Some of our dependencies require a more or less recent version of the compiler. For instance, Gadgetron requires GCC>6, but say CUDA SDK 8 requires GCC <5 which makes building impossible.

It'd be good to be able to set the version of the compiler per project.

[KrisThielemans]

you dare to enter the murky waters of ABI compatibility between different gcc versions? Brave!

In the above case, I'd suggest "build Gadgetron somewhere, but the CUDA stuff somewhere else".

[paskino]

Now the situation is even worse with Gadgetron requiring GCC 9.

[paskino]

Maybe it'd be good to build Gadgetron indipendently?

[KrisThielemans]

See https://github.com/SyneRBI/SIRF-SuperBuild/issues/482