A simple makefile for using Zig to compile C++ for Linux, Windows, and OSX

Makefile

# To use this your file structure should look like this
#
# project_root/
# 	src/main.cpp
# 	include/*.hpp

.DEFAULT_GOAL = run-native
CXX      := zig c++
CXXFLAGS := -std=c++2a -Wall -Wextra -pedantic-errors
INCLUDES := -I ./include/
SRC      := $(shell find ./src/**/ -name "*.cpp")
OBJECTS  := $(SRC:%.cpp=./build/%.o)
BINARY   := sys_mon

release-all: clean-all
	make clean
	make release-linux-x64
	make clean
	make release-linux-arm
	make clean
	make release-osx-x64
	make clean
	make release-osx-arm
	make clean
	make release-windows-x64
	make clean
	make release-windows-arm

%-native: CXX = g++
%-native: PLATFORM = native
run-native: build-native
run-native: run
build-native: build
test-native: test
test-native: run-test
release-native: CXXFLAGS += -O2
release-native: build-native

%-linux-x64: TARGET = -target x86_64-linux
%-linux-x64: PLATFORM = linux-x64
run-linux-x64: build-linux-x64
run-linux-x64: run
build-linux-x64: build
test-linux-x64: test
test-linux-x64: run-test
release-linux-x64: CXXFLAGS += -O2
release-linux-x64: build-linux-x64

%-linux-arm: TARGET = -target aarch64-linux
%-linux-arm: PLATFORM = linux-arm
run-linux-arm: build-linux-arm
run-linux-arm: run
build-linux-arm: build
test-linux-arm: test
test-linux-arm: run-test
release-linux-arm: CXXFLAGS += -O2
release-linux-arm: build-linux-arm

%-osx-arm: TARGET = -target aarch64-macos
%-osx-arm: PLATFORM = osx-arm
run-osx-arm: build-osx-arm
run-osx-arm: run
build-osx-arm: build
test-osx-arm: test
test-osx-arm: run-test
release-osx-arm: CXXFLAGS += -O2
release-osx-arm: build-osx-arm

%-osx-x64: TARGET = -target x86_64-macos
%-osx-x64: PLATFORM = osx-x64
run-osx-x64: build-osx-x64
run-osx-x64: run
build-osx-x64: build
test-osx-x64: test
test-osx-x64: run-test
release-osx-x64: CXXFLAGS += -O2
release-osx-x64: build-osx-x64

%-windows-x64: BINARY := $(BINARY).exe
%-windows-x64: TARGET = -target x86_64-windows
%-windows-x64: PLATFORM = windows-x64
run-windows-x64: build-windows-x64
run-windows-x64: run
build-windows-x64: build
test-windows-x64: test
test-windows-x64: run-test
# -fno-lto is currently required due to this issue.
# https://github.com/ziglang/zig/issues/15958
release-windows-x64: CXXFLAGS += -O2 -fno-lto
release-windows-x64: build-windows-x64

%-windows-arm: BINARY := $(BINARY).exe
%-windows-arm: TARGET = -target aarch64-windows
%-windows-arm: PLATFORM = windows-arm
run-windows-arm: build-windows-arm
run-windows-arm: run
build-windows-arm: build
test-windows-arm: test
test-windows-arm: run-test
# -fno-lto is currently required due to this issue.
# https://github.com/ziglang/zig/issues/15958
release-windows-x64: CXXFLAGS += -O2 -fno-lto
release-windows-arm: build-windows-arm

./build/%.o: %.cpp
	@mkdir -p $(@D)
	$(CXX) $(TARGET) $(CXXFLAGS) $(INCLUDES) -c $< -o $@

build: src/main.cpp $(OBJECTS)
	mkdir -p ./dist/$(PLATFORM)
	$(CXX) \
		$(TARGET) \
		-o ./dist/$(PLATFORM)/$(BINARY) \
		$(CXXFLAGS) \
		$(INCLUDES) \
		$^

test: src/test.cpp $(OBJECTS)
	mkdir -p ./dist/$(PLATFORM)
	$(CXX) \
		 $(TARGET) \
		-o ./dist/$(PLATFORM)/test-$(BINARY) \
		$(CXXFLAGS) \
		$(INCLUDES) \
		$^

run:
	./dist/$(PLATFORM)/$(BINARY)

run-test:
	./dist/$(PLATFORM)/test-$(BINARY)

clean:
	rm -rf ./build/

clean-all: clean
	rm -rf ./dist