Dear MPICH devs, I want to use the MPI test suite provided with MPICH to test an MPI wrapper library I am developing (the MPI wrapper for Score-P). As a first step, I tried to check out the latest version from git, build everything and then run the test suite with `make testing`. I can build MPICH itself without a problem and the example cpi program runs just fine. However, during `make testing` I run into lots of errors of the form In file included from dtpools.c:6: ../include/dtpools_internal.h:12:10: fatal error: mpi.h: No such file or directory 12 | #include "mpi.h" | ^~~~~~~ compilation terminated. This happens only with the git version, not with the tarball version(mpich-4.0b1). I attached all the program outputs and log files. Any help is appreciated. As I workaround I first built MPICH itself, then did './configure CC=mpicc ...', in the test/mpi directory and then directly use the runtests script. This works for now, but is surely not how it was intended. Kind regards, Gregor Corbin