Makefile

release ?= ## Compile in release mode
stats ?=   ## Enable statistics output
threads ?= ## Maximum number of threads to use
debug ?=   ## Add symbolic debug info
no-debug ?= ## No symbolic debug info
verbose ?= ## Run specs in verbose mode
link-flags ?= ## Additional flags to pass to the linker

# OS := $(shell uname -s | tr '[:upper:@]' '[:lower:]')

O := build
FLAGS := $(if $(release),--release )$(if $(stats),--stats )$(if $(threads),--threads $(threads) )$(if $(debug),-d )$(if $(no-debug),--no-debug )$(if $(link-flags),--link-flags "$(link-flags)" )
VERBOSE := $(if $(verbose),-v )

SHELL = bash

## Use mpicc wrapper rather than the system C compiler.
CC = mpicc

CFLAGS += -fPIC
CFLAGS += $(if $(debug),-g -O0)
CFLAGS += $(if $(release),-O2)

LIB_CRMPI = src/ext/crmpi.c
LIB_CRMPI_OBJ = $(subst .c,.o,$(LIB_CRMPI))
LIB_CRMPI_TARGET = src/ext/libcrmpi.a

BIN_CRMPI = src/ext/mpi_vendor.c
BIN_CRMPI_OBJ = $(BIN_CRMPI:.c=.o)
BIN_CRMPI_TARGET = src/ext/mpi_vendor

DEPS = $(LIB_CRMPI_TARGET) $(BIN_CRMPI_TARGET)

EXAMPLES_SOURCES := $(shell find examples -name '*.cr')
EXAMPLES_TARGETS := $(subst examples, $(O), $(patsubst %.cr, %, $(EXAMPLES_SOURCES)))

.PHONY: all
all: deps

.PHONY: deps libcrmpi mpivendor

deps: $(DEPS) ## Build dependencies

libcrmpi: $(LIB_CRMPI_TARGET)

$(LIB_CRMPI_TARGET): $(LIB_CRMPI_OBJ)
	$(AR) -rcs $@ $^

mpivendor: $(BIN_CRMPI_TARGET)

$(BIN_CRMPI_OBJ): $(BIN_CRMPI)
	$(CC) -o $@ -c $< $(CFLAGS)

$(BIN_CRMPI_TARGET): $(BIN_CRMPI_OBJ)
	$(CC) -o $@ $^

$(EXAMPLES_TARGETS):
	@mkdir -p $(O)
	$(BUILD_PATH) crystal build $(FLAGS) $(addsuffix .cr, $(subst build, examples, $@)) -o $@

.PHONY: doc
doc: deps ## Generate mpi.cr library documentation
	@echo "Building documentation..."
	$(BUILD_PATH) crystal doc src/mpi.cr

.PHONY: examples
examples: $(DEPS) $(EXAMPLES_TARGETS)

.PHONY: spec ## Run specs
spec: examples
	$(BUILD_PATH) crystal spec $(FLAGS)
	sh ci/run-examples.sh

.PHONY: clean
clean: ## Clean up built directories and files
	@echo "Cleaning..."
	rm -rf $(O)
	rm -rf ./doc
	rm -rf $(LIB_CRMPI_OBJ) $(LIB_CRMPI_TARGET)
	rm -rf $(BIN_CRMPI_OBJ) $(BIN_CRMPI_TARGET)