behind.

This makes it possible to compile programs again with openmpi.

Also, keep -Wl,OPTION options which pass OPTION down to the linker.

[[Imported from SVN: r6196]]

[[Imported from SVN: r6194]]

* Infrastructure to warn about the use of deprecated preprocessor make
  variables.
* Use that infrastructure to war about MPI_CPPFLAGS.

[[Imported from SVN: r5807]]

  - Introduce autoconf substitutions DUNEMPICPPFLAGS, DUNEMPILDFLAGS and
    DUNEMPILIBS.
  - Deprecate MPI_LDFLAGS and MPI_CPPFLAGS: the automake manual recommends
    against "_" in names of such variables, MPI_LDFLAGS actually contains
    mainly libraries and simply changing MPI_LDFLAGS to MPI_LIBS will probably
    break a lot of stuff.  By deprecating MPI_CPPFLAGS it is possible to make
    the preprocessor generate a deprecation warning with instructions to
    change both MPI_CPPFLAGS and MPI_LDFLAGS (though this has yet to be
    implemented).

[[Imported from SVN: r5806]]

[[Imported from SVN: r5756]]

[[Imported from SVN: r5617]]

[[Imported from SVN: r5587]]

[[Imported from SVN: r5586]]

- first version of mvapich2 check (work for me TM)

[[Imported from SVN: r5584]]

[[Imported from SVN: r5583]]

[[Imported from SVN: r5580]]

-o might be at the beginning of the string, which prevented its removal until now and caused linker errors on jugene

[[Imported from SVN: r5390]]

[[Imported from SVN: r5383]]

 -compile_info options are deprecated and default to the show option which 
displays linker as well as compile flags (at least when linking).

Introduced some magic to separate the flags. This should now work for both mpich and mpich2.


[[Imported from SVN: r5349]]

[[Imported from SVN: r5334]]

[[Imported from SVN: r5333]]

Replace only words!


[[Imported from SVN: r5261]]

[[Imported from SVN: r5251]]

[[Imported from SVN: r4796]]

[[Imported from SVN: r4743]]

[[Imported from SVN: r4656]]

[[Imported from SVN: r4623]]

MPI. This might be useful for those people who wnat to compile alugrid with
MPI and want to easily switch the compiler.

[[Imported from SVN: r4620]]