openmpi-gcc8 - Port is still broken after rebuilding on Max 10.14 Mojave + Xcode 11

[jmbeuken (Jean-Michel Beuken)]

First of all, fresh install on MacOS X 10.14 and some ports installed with success...
But :

sudo port diagnose

Error: currently installed version of Xcode, 11.0, is not supported by MacPorts.  For your currently installed system, only the following versions of Xcode are supported:  10.3 10.2.1 10.2 10.1 10.0

Warning: found dylibs in your /usr/local/lib directory. These are known to cause problems. We'd recommend  you remove them.

can this be a problem?

---

sudo port install openmpi-gcc8 +fortran

<snip> 2 first attemps  </snip>

--->  Cleaning openmpi-gcc8
--->  Updating database of binaries
--->  Scanning binaries for linking errors
--->  No broken files found.
--->  Found 1 broken port, determining rebuild order
--->  Rebuilding in order
     openmpi-gcc8 @4.0.1 +fortran
--->  Computing dependencies for openmpi-gcc8
--->  Fetching distfiles for openmpi-gcc8
--->  Verifying checksums for openmpi-gcc8
--->  Extracting openmpi-gcc8
--->  Applying patches to openmpi-gcc8
--->  Configuring openmpi-gcc8
--->  Building openmpi-gcc8
--->  Staging openmpi-gcc8 into destroot
--->  Deactivating openmpi-gcc8 @4.0.1_0+fortran
--->  Cleaning openmpi-gcc8
--->  Uninstalling openmpi-gcc8 @4.0.1_0+fortran
--->  Cleaning openmpi-gcc8
--->  Computing dependencies for openmpi-gcc8
--->  Installing openmpi-gcc8 @4.0.1_0+fortran
--->  Activating openmpi-gcc8 @4.0.1_0+fortran
--->  Cleaning openmpi-gcc8
--->  Updating database of binaries
--->  Scanning binaries for linking errors
--->  No broken files found.
Error: Port openmpi-gcc8 is still broken after rebuilding it more than 3 times.
Error: Please run port -d -y rev-upgrade and use the output to report a bug.
Error: rev-upgrade failed: Port openmpi-gcc8 still broken after rebuilding 3 times
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
--->  Some of the ports you installed have notes:
  openmpi-gcc8 has the following notes:
    The mpicc wrapper (and friends) are installed as:
    
      /opt/local/bin/mpicc-openmpi-gcc8 (likewise mpicxx, ...)
    
    To make openmpi-gcc8's wrappers the default (what you get when
    you execute 'mpicc' etc.) please run:
    
      sudo port select --set mpi openmpi-gcc8-fortran

Here is a part of output ( full output in attachment ) after running "sudo port -d -y rev-upgrade" as suggested.

...
--->  No broken files found.
openmpi-gcc8 is using libstdc++ (this installation is configured to use libc++)
--->  Found 1 broken port, determining rebuild order
...

cfr ticket:56811

[jmbeuken (Jean-Michel Beuken)]

output