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@@ -1,32 +1,120 @@ |
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SHELL := /bin/bash |
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# |
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# Makefile |
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# |
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# Copyright (C) 2020 Christos Choutouridis <cchoutou@ece.auth.gr> |
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# |
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# This program is free software: you can redistribute it and/or modify |
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# it under the terms of the GNU Lesser General Public License as |
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# published by the Free Software Foundation, either version 3 |
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# of the License, or (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU Lesser General Public License for more details. |
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# |
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# You should have received a copy of the GNU Lesser General Public License |
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# along with this program. If not, see <http://www.gnu.org/licenses/>. |
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# |
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###################################################################### |
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### EXECUTABLES |
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# ========== Project settings ========== |
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TARGET := matmul |
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SRC_DIR := src |
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INC_DIR := |
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EXC_FILE := |
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CC = gcc |
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FLAGS = -O3 -Wall -std=gnu99 |
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RM = rm -rf |
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LINK = -lm |
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# build directories |
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BUILD_DIR := bin |
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OBJ_DIR := $(BUILD_DIR)/obj |
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DEP_DIR := $(BUILD_DIR)/.dep |
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###################################################################### |
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### TARGET FILES |
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# ========== Compiler settings ========== |
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CXX := gcc |
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CPP := gcc -E |
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CSIZE := size |
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MAIN = matmul |
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CFLAGS := -std=gnu99 -Wall -Wextra |
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DEB_FLAGS := -DDEBUG -g3 |
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REL_FLAGS := -O3 |
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LDFLAGS := -lm |
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###################################################################### |
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### CLEAN-UP FILES |
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PRE_DEFS := |
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FILES_CLEAN = $(MAIN) *~ |
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# |
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# =========== Main body and Patterns =========== |
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# |
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INC := $(foreach dir,$(INC_DIR),-I$(dir)) |
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DEF := $(foreach def,$(PRE_DEFS),-D$(def)) |
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###################################################################### |
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### COMMANDS -- ! DO NOT CHANGE BELOW ! |
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# source files |
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# recursive search into current and source directories |
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SRC := $(wildcard *.c) |
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SRC += $(foreach dir,$(SRC_DIR),$(wildcard $(dir)/*.c)) |
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SRC += $(foreach dir,$(SRC_DIR),$(wildcard $(dir)/**/*.c)) |
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# exclude every file from the exclude file list |
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SRC := $(filter-out $(wildcard $(EXC_FILE)),$(SRC)) |
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all: $(MAIN) |
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OBJ := $(foreach file,$(SRC:%.c=%.o),$(OBJ_DIR)/$(file)) |
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DEP := $(foreach file,$(SRC:%.c=%.d),$(DEP_DIR)/$(file)) |
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$(MAIN): $(MAIN).c |
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$(CC) $(FLAGS) $(DEFS) $^ -o $@ $(LINK) |
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# Make Dependencies pattern. |
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# This little trick enables recompilation only when dependencies change |
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# and it does so for changes both in source AND header files ;) |
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# |
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# It is based on Tom Tromey's method. |
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# |
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# Invoke cpp to create makefile rules with dependencies for each source file |
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$(DEP_DIR)/%.d: %.c |
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@mkdir -p $(@D) |
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@$(CPP) $(CFLAGS) $(INC) $(DEF) -MM -MT $(OBJ_DIR)/$(<:.c=.o) -MF $@ $< |
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# objects depent on .c AND dependency files, which have an empty recipe |
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$(OBJ_DIR)/%.o: %.c $(DEP_DIR)/%.d |
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@mkdir -p $(@D) |
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$(CXX) -c $(CFLAGS) $(INC) $(DEF) -o $@ $< |
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# empty recipe for dependency files. This prevents make errors |
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$(DEP): |
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# now include all dependencies |
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# After all they are makefile dependency rules ;) |
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include $(wildcard $(DEP)) |
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# main target rule |
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$(BUILD_DIR)/$(TARGET): $(OBJ) |
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@mkdir -p $(@D) |
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@echo Linking to target: $(TARGET) |
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@echo $(CXX) $(LDFLAGS) -o $(@D)/$(TARGET) '$$(OBJ)' |
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@$(CXX) $(LDFLAGS) -o $(@D)/$(TARGET) $(OBJ) |
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@echo |
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@echo Print size information |
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@$(CSIZE) $(@D)/$(TARGET) |
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@echo Done |
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.PHONY: clean |
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clean: |
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$(RM) $(FILES_CLEAN) *.o *~ |
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@echo Cleaning build directories |
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@rm -rf $(OBJ_DIR) |
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@rm -rf $(DEP_DIR) |
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@rm -rf $(BUILD_DIR) |
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# |
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# ============ User Rules ============= |
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# |
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.PHONY: debug |
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debug: CFLAGS += $(DEB_FLAGS) |
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debug: $(BUILD_DIR)/$(TARGET) |
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.PHONY: release |
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release: CFLAGS += $(REL_FLAGS) |
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release: clean $(BUILD_DIR)/$(TARGET) |
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.PHONY: all |
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all: clean release |
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.PHONY: $(MAIN) |