[petsc-dev] make: print path to mpi.h

[Smith, Barry F.]

https://gitlab.com/petsc/petsc/merge_requests/2409


> On Dec 16, 2019, at 3:02 PM, Lisandro Dalcin <dalcinl at gmail.com> wrote:
> 
> While rebuilding a configuration with C++ on macOS, I got this weird output: 
> 
> -----------------------------------------
> Using system modules: 
> error: invalid argument '-std=c++14' not allowed with 'C'
> Using mpi.h:
> -----------------------------------------
> 
> We are obviously messing C vs CXX flags somewhere.
> 
> -- 
> Lisandro Dalcin
> ============
> Research Scientist
> Extreme Computing Research Center (ECRC)
> King Abdullah University of Science and Technology (KAUST)
> http://ecrc.kaust.edu.sa/