cache on disk mpi_lib detection

src/GNUmakefile

@@ -133,7 +133,7 @@ realclean:
 	-$(RM) $(LIBDIR)/*.a $(BINDIR)/*
 	-$(RM) *.db movecs fort.41 fort.44
 	-$(RM) util/util_version.F
-	-$(RM) libmpi.txt mpi_include.txt ga_cppflags.txt  ga_ldflags.txt  ga_use_scalapack.txt oblas_ompcheck_done.txt peigs_check_done.txt
+	-$(RM) libmpi.txt mpi_lib.txt mpi_include.txt ga_cppflags.txt  ga_ldflags.txt  ga_use_scalapack.txt oblas_ompcheck_done.txt peigs_check_done.txt
 	@# -$(RM) 64_to_32 32_to_64 deps_stamp # This conversion is such a hassle that realclean should not force it.
 
 .PHONY:	cleanF

src/config/makefile.h

@@ -214,7 +214,7 @@ else
       #extract GA libs location from last word in GA_LDLFLAGS
         LIBPATH :=  $(word $(words ${GA_LDFLAGS}),${GA_LDFLAGS}) 
         ifdef EXTERNAL_GA_PATH
-	  LIBPATH ::= -L$(shell $(NWCHEM_TOP)/src/tools/guess-mpidefs --mpi_lib)
+	  LIBPATH ::= -L$(shell $(NWCHEM_TOP)/src/tools/check_mpi_lib.sh $(NWCHEM_TOP))
         endif
     endif
 endif
@@ -244,7 +244,7 @@ else
 	INCPATH :=  $(word $(words $(GA_CPPFLAGS)),$(GA_CPPFLAGS))
 
         ifdef EXTERNAL_GA_PATH
-	  INCPATH := $(INCPATH) -I$(shell $(NWCHEM_TOP)/src/tools/guess-mpidefs --mpi_include)
+	  INCPATH ::= $(INCPATH) -I$(shell $(NWCHEM_TOP)/src/tools/check_mpi_inc.sh $(NWCHEM_TOP))
         endif
     endif
 endif
@@ -3989,8 +3989,8 @@ ifdef USE_MPI
         endif
 
 	NWMPI_INCLUDE := $(shell $(NWCHEM_TOP)/src/tools/check_mpi_inc.sh $(NWCHEM_TOP))
-	NWMPI_LIB     := $(shell $(NWCHEM_TOP)/src/tools/guess-mpidefs --mpi_lib)
-	NWLIBMPI      := $(shell $(NWCHEM_TOP)/src/tools/guess-mpidefs --libmpi)
+	NWMPI_LIB     := $(shell $(NWCHEM_TOP)/src/tools/check_mpi_lib.sh $(NWCHEM_TOP))
+	NWLIBMPI      := $(shell $(NWCHEM_TOP)/src/tools/check_libmpi.sh $(NWCHEM_TOP))
     endif
 
     ifdef NWMPI_INCLUDE

src/tools/check_mpi_lib.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+if [ $# -eq 0 ]
+  then
+    echo "NWCHEM_TOP arg missing"
+    exit 1
+fi
+if [ ! -f $1/src/mpi_lib.txt ]; then
+    $1/src/tools/guess-mpidefs --mpi_lib > $1/src/mpi_lib.txt
+fi
+cat  $1/src/mpi_lib.txt