Makefile.protos

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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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# specific language governing permissions and limitations
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#use "g++" to compile source files
CC := g++
 
BUILD_PATH := build
DEBUG_PATH := $(BUILD_PATH)/debug
RELEASE_PATH := $(BUILD_PATH)/release
MODULES := if
SRC_DIR := $(BUILD_PATH)/src/hbase/$(MODULES)
DEBUG_BUILD_DIR := $(addprefix $(DEBUG_PATH)/hbase/,$(MODULES))
RELEASE_BUILD_DIR := $(addprefix $(RELEASE_PATH)/hbase/,$(MODULES))
INCLUDE_DIR := . $(BUILD_PATH)/src/hbase/if

#flags to pass to the CPP compiler & linker
CPPFLAGS_DEBUG := -D_GLIBCXX_USE_CXX11_ABI=0 -g -Wall -std=c++14 -pedantic -fPIC -MMD -MP
CPPFLAGS_RELEASE := -D_GLIBCXX_USE_CXX11_ABI=0 -DNDEBUG -O2 -Wall -std=c++14 -pedantic -fPIC -MMD -MP

#define list of source files and object files
SRC := $(foreach sdir,$(SRC_DIR),$(wildcard $(sdir)/*.cc))
DEBUG_OBJ := $(patsubst $(SRC_DIR)/%.cc,$(DEBUG_PATH)/hbase/if/%.o,$(SRC))
RELEASE_OBJ := $(patsubst $(SRC_DIR)/%.cc,$(RELEASE_PATH)/hbase/if/%.o,$(SRC))
INCLUDES := $(addprefix -I,$(INCLUDE_DIR))

all: $(DEBUG_BUILD_DIR) $(RELEASE_BUILD_DIR) $(DEBUG_OBJ) $(RELEASE_OBJ)
	
vpath %.cc $(SRC_DIR)

$(DEBUG_OBJ):
define make-goal-dbg
DEPS := $(DEBUG_OBJ:.o=.d)
-include $(DEPS)
$1/%.o: %.cc
	$(CC) -c $$< -o $$@ -MF$$(@:%.o=%.d) -MT$$@ $(CPPFLAGS_DEBUG) $(INCLUDES)
endef

$(RELEASE_OBJ):
define make-goal-rel
DEPS := $(RELEASE_OBJ:.o=.d)
-include $(DEPS)
$1/%.o: %.cc
	$(CC) -c $$< -o $$@ -MF$$(@:%.o=%.d) -MT$$@ $(CPPFLAGS_RELEASE) $(INCLUDES)
endef

.PHONY: all clean

$(DEBUG_BUILD_DIR):
	@mkdir -p $@

$(RELEASE_BUILD_DIR):
	@mkdir -p $@

clean:
	@rm -rf $(DEBUG_BUILD_DIR) $(RELEASE_BUILD_DIR)

$(foreach bdir,$(DEBUG_BUILD_DIR),$(eval $(call make-goal-dbg,$(bdir))))

$(foreach bdir,$(RELEASE_BUILD_DIR),$(eval $(call make-goal-rel,$(bdir))))

help:
	@echo "This Makefile invocation will only work when protobuf sources and headers have been generated by running 'make protos'"
	@echo "Available targets:"
	@echo ""
	@echo " all          : creates objects for the generated PB src."
	@echo " clean        : removes PB objects."