I just upgraded to macOS 10.14.4 and installed the latest Intel C and Fortran compilers (19.0.3) and now I can no longer compile mpich nor openmpi. Here are the errors I'm getting:
openmpi (4.0.1):
CC dfs_test.lo
": internal error: ** The compiler has encountered an unexpected problem.
** Segmentation violation signal raised. **
Access violation or stack overflow. Please contact Intel Support for assistance.
mpich (3.3):
GEN lib/libpmpi.la
ld: illegal thread local variable reference to regular symbol __tls___MPIR_Per_thread for architecture x86_64
make[2]: *** [lib/libpmpi.la] Error 1
Both of these complied fine with the 2018 intel compiler and macOS 10.13.