allow an external install of the mpi-serial library

CIME/Tools/Makefile

@@ -373,7 +373,13 @@ ifeq ($(strip $(MPILIB)), mpi-serial)
   MPIFC	  := $(SFC)
   MPICC	  := $(SCC)
   MPICXX  := $(SCXX)
-  CONFIG_ARGS += MCT_PATH=$(SHAREDLIBROOT)/$(SHAREDPATH)/mct/mpi-serial
+  ifndef MPI_SERIAL_PATH
+    CONFIG_ARGS += MCT_PATH=$(SHAREDLIBROOT)/$(SHAREDPATH)/mct/mpi-serial
+  else
+    CONFIG_ARGS += MCT_PATH=$(MPI_SERIAL_PATH)
+    INC_MPI := $(MPI_SERIAL_PATH)/include
+    LIB_MPI := $(MPI_SERIAL_PATH)/lib
+  endif
 else
   CC  := $(MPICC)
   FC  := $(MPIFC)
@@ -567,9 +573,9 @@ ifdef MPAS_LIBDIR
 # used to build the MPAS dycore if needed.
 libmpas: cam_abortutils.o physconst.o
 	$(MAKE) -C $(MPAS_LIBDIR) CC="$(CC)" FC="$(FC)" PIODEF="$(PIODEF)" \
-        FFLAGS='$(FREEFLAGS) $(FFLAGS)' GPUFLAGS='$(GPUFLAGS)' \
-        CASEROOT='$(CASEROOT)' COMPILER='$(COMPILER)' MACH='$(MACH)' \
-        FCINCLUDES='$(INCLDIR) $(INCS) -I$(ABS_INSTALL_SHAREDPATH)/include -I$(ABS_ESMF_PATH)/include'
+	FFLAGS='$(FREEFLAGS) $(FFLAGS)' GPUFLAGS='$(GPUFLAGS)' \
+	CASEROOT='$(CASEROOT)' COMPILER='$(COMPILER)' MACH='$(MACH)' \
+	FCINCLUDES='$(INCLDIR) $(INCS) -I$(ABS_INSTALL_SHAREDPATH)/include -I$(ABS_ESMF_PATH)/include'
 
 dyn_comp.o: libmpas
 dyn_grid.o: libmpas
@@ -595,10 +601,12 @@ ifdef LAPACK_LIBDIR
    SLIBS += -L$(LAPACK_LIBDIR) -llapack -lblas
 endif
 ifdef LIB_MPI
-   ifndef MPI_LIB_NAME
-      SLIBS += -L$(LIB_MPI) -lmpi
-   else
-      SLIBS += -L$(LIB_MPI) -l$(MPI_LIB_NAME)
+   ifndef MPI_SERIAL_PATH
+     ifndef MPI_LIB_NAME
+	SLIBS += -L$(LIB_MPI) -lmpi
+     else
+	SLIBS += -L$(LIB_MPI) -l$(MPI_LIB_NAME)
+     endif
    endif
 endif
 
@@ -919,12 +927,21 @@ GENF90 ?= $(CIMEROOT)/CIME/non_py/externals/genf90/genf90.pl
 .SUFFIXES: .F90 .F .f90 .f .c .cpp .o .in
 
 ifeq ($(MPILIB),mpi-serial)
-  MPISERIAL = $(INSTALL_SHAREDPATH)/lib/libmpi-serial.a
-  MLIBS += -L$(INSTALL_SHAREDPATH)/lib -lmpi-serial
-  CMAKE_OPTS += -DMPI_C_INCLUDE_PATH=$(INSTALL_SHAREDPATH)/include \
+  ifdef MPI_SERIAL_PATH
+    MPISERIAL = $(MPI_SERIAL_PATH)/lib/libmpi-serial.a
+    MLIBS += -L$(MPI_SERIAL_PATH)/lib -lmpi-serial
+    CMAKE_OPTS += -DMPI_C_INCLUDE_PATH=$(MPI_SERIAL_PATH)/include \
+      -DMPI_Fortran_INCLUDE_PATH=$(MPI_SERIAL_PATH)/include \
+      -DMPI_C_LIBRARIES=$(MPI_SERIAL_PATH)/lib/libmpi-serial.a \
+      -DMPI_Fortran_LIBRARIES=$(MPI_SERIAL_PATH)/lib/libmpi-serial.a
+  else
+    MPISERIAL = $(INSTALL_SHAREDPATH)/lib/libmpi-serial.a
+    MLIBS += -L$(INSTALL_SHAREDPATH)/lib -lmpi-serial
+    CMAKE_OPTS += -DMPI_C_INCLUDE_PATH=$(INSTALL_SHAREDPATH)/include \
       -DMPI_Fortran_INCLUDE_PATH=$(INSTALL_SHAREDPATH)/include \
       -DMPI_C_LIBRARIES=$(INSTALL_SHAREDPATH)/lib/libmpi-serial.a \
       -DMPI_Fortran_LIBRARIES=$(INSTALL_SHAREDPATH)/lib/libmpi-serial.a
+  endif
 endif
 
 $(MCTLIBS)  : $(MPISERIAL)

CIME/XML/machines.py

@@ -12,7 +12,14 @@
 
 
 class Machines(GenericXML):
-    def __init__(self, infile=None, files=None, machine=None, extra_machines_dir=None):
+    def __init__(
+        self,
+        infile=None,
+        files=None,
+        machine=None,
+        extra_machines_dir=None,
+        read_only=True,
+    ):
         """
         initialize an object
         if a filename is provided it will be used,
@@ -46,7 +53,7 @@ def __init__(self, infile=None, files=None, machine=None, extra_machines_dir=Non
         else:
             expect(False, f"file not found {infile}")
 
-        GenericXML.__init__(self, infile, schema)
+        GenericXML.__init__(self, infile, schema, read_only=read_only)
 
         # Append the contents of $HOME/.cime/config_machines.xml if it exists.
         #

CIME/build_scripts/buildlib.mpi-serial

@@ -50,6 +50,11 @@ def buildlib(bldroot, installpath, case):
     ###############################################################################
     caseroot = case.get_value("CASEROOT")
     srcroot = case.get_value("SRCROOT")
+    # check to see if MPI_SERIAL is installed
+    with open(os.path.join(caseroot, "Macros.make"), "r") as f:
+        for line in f:
+            if "MPI_SERIAL_PATH" in line:
+                return
 
     customize_path = os.path.join(srcroot, "cime_config", "customize")
 

CIME/non_py/src/timing/Makefile

@@ -52,7 +52,11 @@ ifeq ($(strip $(MPILIB)), mpi-serial)
   FC      := $(SFC)
   MPIFC   := $(SFC)
   MPICC   := $(SCC)
-  INCLDIR += -I$(GPTL_LIBDIR)/../mct/mpi-serial
+  ifdef MPI_SERIAL_PATH
+    INCLDIR += -I$(MPI_SERIAL_PATH)/include
+  else
+    INCLDIR += -I$(GPTL_LIBDIR)/../mct/mpi-serial
+  endif
 else
   CC := $(MPICC)
   FC := $(MPIFC)