cmake support: first cut from David Vaz work.i

library/lammpi/CMakeLists.txt

@@ -0,0 +1,31 @@
+macro_optional_find_package (MPI OFF)
+macro_log_feature (MPI_C_FOUND "mpi" 
+  "MPI Distributed Parallel Programming" 
+  "http://gmplib.org")
+if (MPI_C_FOUND)
+  # This module will set the following variables per language in your
+  # project, where <lang> is one of C, CXX, or Fortran:
+  #
+  # ::
+  #
+  #    MPI_<lang>_FOUND           TRUE if FindMPI found MPI flags for <lang>
+  #    MPI_<lang>_COMPILER        MPI Compiler wrapper for <lang>
+  #    MPI_<lang>_COMPILE_FLAGS   Compilation flags for MPI programs
+  #    MPI_<lang>_INCLUDE_PATH    Include path(s) for MPI header
+  #    MPI_<lang>_LINK_FLAGS      Linking flags for MPI programs
+  #    MPI_<lang>_LIBRARIES       All libraries to link MPI programs against
+  #
+  # Additionally, FindMPI sets the following variables for running MPI
+  # programs from the command line:
+  #
+  # ::
+  #
+  #    MPIEXEC                    Executable for running MPI programs
+  #    MPIEXEC_NUMPROC_FLAG       Flag to pass to MPIEXEC before giving
+  #                               it the number of processors to run on
+  #    MPIEXEC_PREFLAGS           Flags to pass to MPIEXEC directly
+  #                               before the executable to run.
+  #    MPIEXEC_POSTFLAGS          Flags to pass to MPIEXEC after other flags
+  #
+endif (MPI_C_FOUND)
+