Bug#946590: python3-dolfin: cannot find -lmpi

[Nico Schlömer]

Package: python3-dolfin
Version: 2019.1.0-7
Severity: normal

I don't know if this is a bug in the package or in my system. With the simplest
of python dolfin projects, I'm getting
```
------------------- Start compiler output ------------------------
/usr/bin/ld: cannot find -lmpi
collect2: error: ld returned 1 exit status

-------------------  End compiler output  ------------------------
Compilation failed! Sources, command, and errors have been written to:
/tmp/jitfailure-dolfin_expression_0ca911efb98de95f0dd6d82a8f353384
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/dolfin/jit/jit.py", line 167, in
compile_class
    mpi_comm=mpi_comm)
  File "/usr/lib/python3/dist-packages/dolfin/jit/jit.py", line 47, in mpi_jit
    return local_jit(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/dolfin/jit/jit.py", line 103, in
dijitso_jit
    return dijitso.jit(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/dijitso/jit.py", line 217, in jit
    % err_info['fail_dir'], err_info)
dijitso.jit.DijitsoError: Dijitso JIT compilation failed, see '/tmp/jitfailure-
dolfin_expression_0ca911efb98de95f0dd6d82a8f353384' for details

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "l.py", line 37, in <module>
    u0 = Expression("a*sin(2.5*pi*x[1])*x[0]", a=0.2, degree=5)
  File "/usr/lib/python3/dist-packages/dolfin/function/expression.py", line
400, in __init__
    self._cpp_object = jit.compile_expression(cpp_code, params)
  File "/usr/lib/python3/dist-packages/dolfin/function/jit.py", line 158, in
compile_expression
    expression = compile_class(cpp_data, mpi_comm=mpi_comm)
  File "/usr/lib/python3/dist-packages/dolfin/jit/jit.py", line 170, in
compile_class
    raise RuntimeError("Unable to compile C++ code with dijitso")
RuntimeError: Unable to compile C++ code with dijitso
```

Is there a missing dependency? MPI seems to be there:
```
$ ls /usr/lib/x86_64-linux-gnu/libmpi.so.40*
/usr/lib/x86_64-linux-gnu/libmpi.so.40
/usr/lib/x86_64-linux-gnu/libmpi.so.40.20.2
```



-- System Information:
Debian Release: bullseye/sid
  APT prefers focal
  APT policy: (500, 'focal')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.3.0-19-generic (SMP w/8 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_WARN, TAINT_OOT_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages python3-dolfin depends on:
ii  libc6                               2.30-0ubuntu2
ii  libdolfin-dev                       2019.1.0-7
ii  libdolfin2019.1                     2019.1.0-7
ii  libgcc1                             1:9.2.1-21ubuntu1
ii  libopenmpi3                         4.0.2-4
ii  libpetsc-real3.11                   3.11.4+dfsg1-3build1
ii  libstdc++6                          9.2.1-21ubuntu1
ii  python3                             3.7.5-1ubuntu1
ii  python3-dijitso                     2019.1.0-3
ii  python3-ffc                         2019.1.0.post0-2
ii  python3-numpy [python3-numpy-abi9]  1:1.17.4-3ubuntu2
ii  python3-petsc4py                    3.11.0-4
ii  python3-pkgconfig                   1.5.1-3
ii  python3-ply                         3.11-3
ii  python3-pybind11                    2.3.0-2
ii  python3-six                         1.12.0-2build1
ii  python3-slepc4py                    3.11.0-2build1
ii  python3-sympy                       1.4-1
ii  python3-ufl                         2019.1.0-2

python3-dolfin recommends no packages.

Versions of packages python3-dolfin suggests:
pn  dolfin-doc  <none>

-- no debconf information