[Openmp-commits] [openmp] [WIP][flang] Compile proper `omp_lib.mod` from the `openmp/src/include` sources (PR #80874)

[Jonathan Peyton via Openmp-commits]

jpeyton52 wrote:

> > For Intel Fortran compiler, there would need to be an additional flag during module compilation, -fpp, to enable preprocessing. I think gfortran is OK without the flag (and they use -cpp). I don't know about other Fortran compilers.
> 
> The compiler won't need it, if the extension changed from `f90` to `F90`, because then it would automatically invoke the preprocessor on the file.
Haha! I wasn't aware of this Fortran oddity.

> 
> So, may I assume that Intel is generally fine with the change I'm proposing to make the file compilable with Flang?
Yes, the change looks fine.
I suppose you just need to rename the file `omp_lib.f90.var` -> `omp_lib.F90.var` and replace the filename in `openmp/runtime/src/CMakeLists.txt`

https://github.com/llvm/llvm-project/pull/80874