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Q6: A better makefile and code organization

master
parent
commit
a4fbbdd9d6
2 changed files with 108 additions and 20 deletions
  1. +108
    -20
      Q6-cache/Makefile
  2. +0
    -0
      Q6-cache/src/matmul.c

+ 108
- 20
Q6-cache/Makefile View File

@@ -1,32 +1,120 @@
SHELL := /bin/bash
#
# Makefile
#
# Copyright (C) 2020 Christos Choutouridis <cchoutou@ece.auth.gr>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 3
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

######################################################################
### EXECUTABLES
# ========== Project settings ==========
TARGET := matmul
SRC_DIR := src
INC_DIR :=
EXC_FILE :=

CC = gcc
FLAGS = -O3 -Wall -std=gnu99
RM = rm -rf
LINK = -lm
# build directories
BUILD_DIR := bin
OBJ_DIR := $(BUILD_DIR)/obj
DEP_DIR := $(BUILD_DIR)/.dep

######################################################################
### TARGET FILES
# ========== Compiler settings ==========
CXX := gcc
CPP := gcc -E
CSIZE := size

MAIN = matmul
CFLAGS := -std=gnu99 -Wall -Wextra
DEB_FLAGS := -DDEBUG -g3
REL_FLAGS := -O3
LDFLAGS := -lm

######################################################################
### CLEAN-UP FILES
PRE_DEFS :=

FILES_CLEAN = $(MAIN) *~
#
# =========== Main body and Patterns ===========
#
INC := $(foreach dir,$(INC_DIR),-I$(dir))
DEF := $(foreach def,$(PRE_DEFS),-D$(def))

######################################################################
### COMMANDS -- ! DO NOT CHANGE BELOW !
# source files
# recursive search into current and source directories
SRC := $(wildcard *.c)
SRC += $(foreach dir,$(SRC_DIR),$(wildcard $(dir)/*.c))
SRC += $(foreach dir,$(SRC_DIR),$(wildcard $(dir)/**/*.c))
# exclude every file from the exclude file list
SRC := $(filter-out $(wildcard $(EXC_FILE)),$(SRC))

all: $(MAIN)
OBJ := $(foreach file,$(SRC:%.c=%.o),$(OBJ_DIR)/$(file))
DEP := $(foreach file,$(SRC:%.c=%.d),$(DEP_DIR)/$(file))

$(MAIN): $(MAIN).c
$(CC) $(FLAGS) $(DEFS) $^ -o $@ $(LINK)

# Make Dependencies pattern.
# This little trick enables recompilation only when dependencies change
# and it does so for changes both in source AND header files ;)
#
# It is based on Tom Tromey's method.
#
# Invoke cpp to create makefile rules with dependencies for each source file
$(DEP_DIR)/%.d: %.c
@mkdir -p $(@D)
@$(CPP) $(CFLAGS) $(INC) $(DEF) -MM -MT $(OBJ_DIR)/$(<:.c=.o) -MF $@ $<


# objects depent on .c AND dependency files, which have an empty recipe
$(OBJ_DIR)/%.o: %.c $(DEP_DIR)/%.d
@mkdir -p $(@D)
$(CXX) -c $(CFLAGS) $(INC) $(DEF) -o $@ $<

# empty recipe for dependency files. This prevents make errors
$(DEP):

# now include all dependencies
# After all they are makefile dependency rules ;)
include $(wildcard $(DEP))

# main target rule
$(BUILD_DIR)/$(TARGET): $(OBJ)
@mkdir -p $(@D)
@echo Linking to target: $(TARGET)
@echo $(CXX) $(LDFLAGS) -o $(@D)/$(TARGET) '$$(OBJ)'
@$(CXX) $(LDFLAGS) -o $(@D)/$(TARGET) $(OBJ)
@echo
@echo Print size information
@$(CSIZE) $(@D)/$(TARGET)
@echo Done


.PHONY: clean
clean:
$(RM) $(FILES_CLEAN) *.o *~
@echo Cleaning build directories
@rm -rf $(OBJ_DIR)
@rm -rf $(DEP_DIR)
@rm -rf $(BUILD_DIR)

#
# ============ User Rules =============
#

.PHONY: debug
debug: CFLAGS += $(DEB_FLAGS)
debug: $(BUILD_DIR)/$(TARGET)


.PHONY: release
release: CFLAGS += $(REL_FLAGS)
release: clean $(BUILD_DIR)/$(TARGET)


.PHONY: all
all: clean release

.PHONY: $(MAIN)

Q6-cache/matmul.c → Q6-cache/src/matmul.c View File


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