problem (and workaround) compiling arpack-ng_3.1.0

[Sergei Steshenko]

Hello,

since arpack-ng_3.1.0 is also developed by Octave developers, this may be a 
proper list to publish my findings.

I had my "favorite" "'make' fails even though 'configure' is OK" problem, 
particularly, the message was:

"

make[3]: Entering directory 
`/mnt/sdb8/sergei/AFSWD_debug/build/arpack-ng_3.1.0/PARPACK/UTIL/MPI'
/mnt/sdb8/sergei/AFSWD_debug/20120424/bash-4.2/bin/bash ../../../libtool 
--tag=F77   --mode=compile   -g -O2 -c -o pivout.lo pivout.f
libtool: compile: unrecognized option `-g'
".

Actually, there are two problematic files producing such error messages:

arpack-ng_3.1.0/PARPACK/UTIL/MPI/Makefile
arpack-ng_3.1.0/PARPACK/SRC/MPI/Makefile

- somehow F77 is undefined in them - I am using self-built gcc-4.5.3 and it has 
'gfortran' and in other places, starting from 'configure', it works OK.

The workaround is to run 'make F77=gfortran' rather than just 'make'.

I think this should be fixed.

Thanks,
  Sergei.