219 lines
6.7 KiB
Makefile
219 lines
6.7 KiB
Makefile
#
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# Makefile for utl Unit test
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#
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# Copyright (C) 2019-2020 Christos Choutouridis <christos@choutouridis.net>
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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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# ult notes:
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# ==============
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# This makefile provides support for unix-like local builds and
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# docker based builds for gcc and clang.
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# ** msvc is not currently supported.
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#
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# Use cases:
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# 1) build localy using **local rules** in terminal.
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# example:
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# make -j4 MK_ARG="-std=c++14 -fconcepts" build-gcc
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#
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# 2) build localy using **docker based rules** via terminal or script
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# in order to compile for all compilers/versions/dialects.
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# example in bash:
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# #!/bin/bash
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# for im in gcc:8 gcc:9 gcc:10; do
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# for dial in -std=c++14 -std=c++17; do
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# make IMAGE="$im" MK_ARG="$dial" dock-gcc
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# done
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# done
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#
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# 3) build inside a docker instance using **local rules** in order to
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# build and test using a CD/CI system.
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# example in a yml file:
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# image: gcc:8
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# build:
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# stage: build
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# - make MK_ARG="-std=c++14" build-gcc
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# - make MK_ARG="-std=c++14 -fconcepts" build-gcc
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# - make MK_ARG="-std=c++17" build-gcc
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# - make MK_ARG="-std=c++17 -fconcepts" build-gcc
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# - make MK_ARG="-std=c++2a" build-gcc
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# ... etc
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# test:
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# stage: test
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# - bin/utlTest
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# ... etc
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# ============== Project settings ==============
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# Project's name
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PROJECT := utl
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# Excecutable's name
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TARGET := utlTest
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# Source directories list(space seperated).
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# Relative path, under current directory only
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SRC_DIR_LIST := tests gtest
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# Include directories list(space seperated).
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# Relative path
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INC_DIR_LIST := ../include gtest
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# Exclude files list(space seperated). Filenames only.
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# EXC_FILE_LIST := bad.cpp old.cpp
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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 := $(BUILD_DIR)/.dep
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# ============== Compiler settings ==============
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CLANGXX := clang++
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GCCXX := g++
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CSIZE := size
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# Compiler flags for debug and release
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DEB_CFLAGS := -DDEBUG -g3 -Wall -Wextra
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REL_CFLAGS := -Wall -Wextra -O2
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# Pre-defines
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# PRE_DEFS := MYCAB=1729 SUPER_MODE
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# ============== Linker settings ==============
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# Linker flags
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LDFLAGS := -pthread
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# Map output file
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MAP_FILE := output.map
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MAP_FLAG := -Xlinker -Map=$(BUILD_DIR)/$(MAP_FILE)
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# ============== Docker settings ==============
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# We need:
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# 1) Bind the entire project directory(the dir that icludes all the code) as volume.
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# 2) In docker instance change to working directory(where the makefile is).
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# For utl we use the directories `${PWD%/*}` and `test`.
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# We double-$$ for double evaluating.
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DOCKER_VOL_DIR := "$${PWD%/*}"
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DOCKER_WRK_DIR := test
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DOCKER_RUN := docker run --rm -v $(DOCKER_VOL_DIR):/usr/src/$(PROJECT) -w /usr/src/$(PROJECT)/$(DOCKER_WRK_DIR)
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# ============== Default settings ==============
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# compiler and compiler flags. By default docker is not used.
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CFLAGS := $(DEB_CFLAGS)
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CXX := $(GCCXX)
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DOCKER :=
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#
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# =========== Main body and Patterns ===========
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#
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ifeq ($(OS), Windows_NT)
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TARGET := $(TARGET).exe
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endif
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INC := $(foreach dir,$(INC_DIR_LIST),-I$(dir))
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DEF := $(foreach def,$(PRE_DEFS),-D$(def))
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EXC := $(foreach fil,$(EXC_FILE_LIST), \
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$(foreach dir,$(SRC_DIR_LIST),$(wildcard $(dir)/$(fil))) \
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)
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# source files, object and dependencies list
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# recursive search into current and source directories
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SRC := $(wildcard *.cpp)
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SRC += $(foreach dir,$(SRC_DIR_LIST),$(wildcard $(dir)/*.cpp))
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SRC += $(foreach dir,$(SRC_DIR_LIST),$(wildcard $(dir)/**/*.cpp))
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#SRC := $(abspath $(filter-out $(EXC),$(SRC)))
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SRC := $(filter-out $(EXC),$(SRC))
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OBJ := $(foreach file,$(SRC:%.cpp=%.o),$(OBJ_DIR)/$(file))
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DEP := $(foreach file,$(SRC:%.cpp=%.d),$(DEP_DIR)/$(file))
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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: %.cpp
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@mkdir -p $(@D)
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@$(DOCKER) $(CXX) -E $(CFLAGS) $(INC) $(DEF) -MM -MT $(OBJ_DIR)/$(<:.cpp=.o) -MF $@ $<
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# objects depent on .cpp AND dependency files, which have an empty recipe
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$(OBJ_DIR)/%.o: %.cpp $(DEP_DIR)/%.d
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@mkdir -p $(@D)
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$(DOCKER) $(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 $(DOCKER) $(CXX) $(LDFLAGS) $(MAP_FLAG) -o $(@D)/$(TARGET) '$$(OBJ)'
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@$(DOCKER) $(CXX) $(LDFLAGS) $(MAP_FLAG) -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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@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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# ================ Local build rules =================
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# examples:
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# make MK_ARG="-std=c++14 -fconcepts" build-gcc
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# make MK_ARG="-std=c++17" build-clang
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#
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.PHONY: build-gcc
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build-gcc: CFLAGS += $(MK_ARG)
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build-gcc: $(BUILD_DIR)/$(TARGET)
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.PHONY: build-clang
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build-clang: CXX := $(CLANGXX)
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build-clang: CFLAGS += $(MK_ARG)
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build-clang: $(BUILD_DIR)/$(TARGET)
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.PHONY: debug
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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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#
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# ================ Docker based rules ================
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# examples:
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# make IMAGE="gcc:8.3" MK_ARG="-std=c++14 -fconcepts" dock-gcc
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# make IMAGE="a-clang-image" MK_ARG="-std=c++17" dock-clang
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#
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.PHONY: dock-gcc
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dock-gcc: DOCKER := $(DOCKER_RUN) $(IMAGE)
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dock-gcc: CFLAGS += $(MK_ARG)
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dock-gcc: $(BUILD_DIR)/$(TARGET)
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.PHONY: dock-clang
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dock-clang: CXX := $(CLANGXX)
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dock-clang: DOCKER := $(DOCKER_RUN) $(IMAGE)
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dock-clang: CFLAGS += $(MK_ARG)
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dock-clang: $(BUILD_DIR)/$(TARGET)
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