Bug#870054: freefem++: scalapack and blacs not found at build time

[Drew Parsons]

Source: freefem++
Version: 3.47+dfsg1-1
Severity: normal

blacs is about to be removed from the Debian archives, replaced by
scalapack2.0 (now in experimental).  So the configuration for the
freefem++ build will need to be updated to match. configure will need
to point the blacs library at -lscalapack$ff_with_mpi instead of
-lblacsCinit$ff_with_mpi, etc.

Actually there's another problem. Inspecting the current build logs,
neither blacs nor scalapack (the old versions currently still in
unstable) are currently being found at build time.  The logs (amd64)
report:
    checking check hypre... yes
    checking check superlu_dist... no
    checking check superlu... yes
    checking check superlu4... no
    checking check blacs... no
    checking check scalapack... no
    checking check scotch... no
    checking check ptscotch... no
    checking check metis... no
    checking check metis... yes
    checking check parmetis... no

That should be fixed first, then it will be more clear how to
reconfigure for blacs in scalapack2.0.

Cheers,
Drew


-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.11.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_AU.UTF-8, LC_CTYPE=en_AU.UTF-8 (charmap=UTF-8), LANGUAGE=en_AU.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)