Makefile

# Copyright 2020-2021 Apple Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

TARGET = build/main
SOURCES = $(shell find . -name '*.cpp' -or -name '*.mm')
CPP_SOURCES = $(filter %.cpp,$(SOURCES))
MM_SOURCES = $(filter %.mm,$(SOURCES))

OBJECTS_CPP = $(CPP_SOURCES:.cpp=.o)
OBJECTS_MM = $(MM_SOURCES:.mm=.o)

OBJECTS = $(OBJECTS_CPP) $(OBJECTS_MM)

METAL_FILES := $(wildcard src/metal/*.metal)


ifdef DEBUG
DBG_OPT_FLAGS=-g -O0
else
DBG_OPT_FLAGS=-O2
endif

ifdef ASAN
ASAN_FLAGS=-fsanitize=address
else
ASAN_FLAGS=
endif

ifdef PROFILE
PROFILE_FLAGS=-sectcreate __TEXT __info_plist Info.plist
else
PROFILE_FLAGS=
endif

CC=clang++
CFLAGS=-Wall -std=c++17 -I./metal-cpp -I./metal-cpp-extensions -fno-objc-arc $(DBG_OPT_FLAGS) $(ASAN_FLAGS)
LDFLAGS=-framework Metal -framework Foundation -framework Cocoa -framework CoreGraphics -framework MetalKit

%.o: %.cpp
	$(CC) -c $(CFLAGS) $< -o $@

%.o: %.mm
	$(CC) -c $(CFLAGS) $< -o $@

all: build/main

.PHONY: all

build/shaders.metallib: $(METAL_FILES)
	xcrun -sdk macosx metal -frecord-sources=flat -o $@ $(METAL_FILES)

build/main: $(OBJECTS) build/shaders.metallib Makefile
	$(CC) $(CFLAGS) $(LDFLAGS) $(PROFILE_FLAGS) $(OBJECTS) -o $@

run: build/main
	@./$(TARGET)

clean:
	rm -f $(OBJECTS) \
		build/shaders.metallib \
		build/shaders.metallibsym \
		build/main