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Build option to download and build PT-SCOTCH automatically #1472

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46 changes: 43 additions & 3 deletions Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -777,6 +777,34 @@ endif
LIBS += $(NCLIB)
endif

export SCOTCH ?= false
ifeq "$(SCOTCH)" "true"
ifeq ($(wildcard $(SCOTCH_ROOT)), )
export SCOTCH_RELPATH=src/external/scotch
export SCOTCH_ROOT=${CURDIR}/${SCOTCH_RELPATH}/install
export SCOTCH_LIB_DIR=lib
else
ifneq ($(wildcard $(SCOTCH_ROOT)/lib/libptscotch.a), )
SCOTCH_LIB_DIR=lib64
else ifneq ($(wildcard $(SCOTCH_ROOT)/lib64/libptscotch.a), )
SCOTCH_LIB_DIR=lib64
else
$(error Could not find SCOTCH library in $(SCOTCH_ROOT)/lib or $(SCOTCH_ROOT)/lib64)
endif
endif
SCOTCH_INCLUDES += -I$(SCOTCH_ROOT)/include
SCOTCH_LIBS += -L$(SCOTCH_ROOT)/$(SCOTCH_LIB_DIR) -lptscotch -lscotch -lptscotcherr -lm
SCOTCH_FLAGS = -DMPAS_SCOTCH
CPPINCLUDES += $(SCOTCH_INCLUDES)
LIBS += $(SCOTCH_LIBS)
override CPPFLAGS += $(SCOTCH_FLAGS)
SCOTCH_MESSAGE="MPAS was built with an external SCOTCH library using SCOTCH path"
else ifeq "$(SCOTCH)" "false"
SCOTCH_MESSAGE="MPAS was built with the embedded SCOTCH library."
else
$(error Invalid SCOTCH option: $(SCOTCH) - valid options "true", "false")
endif

ifneq "$(SCOTCH)" ""
SCOTCH_INCLUDES += -I$(SCOTCH)/include
SCOTCH_LIBS += -L$(SCOTCH)/lib64 -lptscotch -lscotch -lptscotcherr -lm
Expand Down Expand Up @@ -1086,6 +1114,7 @@ rebuild_check:
OPENMP=$(OPENMP)\n$\
OPENMP_OFFLOAD=$(OPENMP_OFFLOAD)\n$\
OPENACC=$(OPENACC)\n$\
SCOTCH=$(SCOTCH)\n$\
TAU=$(TAU)\n$\
PICFLAG=$(PICFLAG)\n$\
TIMER_LIB=$(TIMER_LIB)\n$\
Expand Down Expand Up @@ -1442,11 +1471,22 @@ musica_fortran_test:
$(eval MUSICA_FORTRAN_VERSION := $(shell pkg-config --modversion musica-fortran))
$(if $(findstring 1,$(MUSICA_FORTRAN_TEST)), $(info Built a simple test program with MUSICA-Fortran version $(MUSICA_FORTRAN_VERSION)), )

scotch_c_test:
$(SCOTCH_ROOT)/$(SCOTCH_LIB_DIR)/libptscotch.a:
@#
@# Build the Scotch library if it is not already built
@#
$(info Building Scotch library...)
src/core_atmosphere/tools/manage_externals/checkout_externals --externals src/Externals.cfg;
cd ${SCOTCH_RELPATH} && mkdir -p build;
cd ${SCOTCH_RELPATH}/build && cmake .. -DCMAKE_INSTALL_PREFIX=$(SCOTCH_ROOT) -DCMAKE_INSTALL_LIBDIR=$(SCOTCH_LIB_DIR) -DCMAKE_BUILD_TYPE=Release;
cd ${SCOTCH_RELPATH}/build && make -j$(nproc);
cd ${SCOTCH_RELPATH}/build && make install;

scotch_c_test: $(SCOTCH_ROOT)/$(SCOTCH_LIB_DIR)/libptscotch.a
@#
@# Create a C test program and try to build against the PT-SCOTCH library
@#
$(info Checking for a working Scotch library...)
$(info Checking for a working Scotch library in $(SCOTCH_ROOT)...)
$(eval SCOTCH_C_TEST := $(shell $\
printf "#include <stdio.h>\n\
&#include \"mpi.h\"\n\
Expand Down Expand Up @@ -1529,7 +1569,7 @@ else
MUSICA_MESSAGE = "MPAS was not linked with the MUSICA-Fortran library."
endif

ifneq "$(SCOTCH)" ""
ifeq "$(SCOTCH)" "true"
MAIN_DEPS += scotch_c_test
SCOTCH_MESSAGE = "MPAS has been linked with the Scotch graph partitioning library."
else
Expand Down
9 changes: 9 additions & 0 deletions src/Externals.cfg
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Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
[SCOTCH]
local_path = ./src/external/scotch
protocol = git
repo_url = https://gitlab.inria.fr/scotch/scotch.git
tag = v7.0.11
required = True

[externals_description]
schema_version = 1.0.0