precompiled headers makefile help

.PHONY: all shadersCompile gch engineBuild clientBuild run clean

# --Setup--
APP_NAME = app
BUILD_DIR = ./bin
SHADERS_DIR = ./engine/shaders
SPIRV_DIR = $(BUILD_DIR)/spirv

# --Compiler--
CXX = g++
CXXFLAGS = -std=c++20 -O3 -g -fvisibility=hidden

# --LIBRARY--

# Precompiled Header
PCH_FILE = $(wildcard $(shell find ./engine/src -name 'bhy_pch.hpp'))
PCH_GCH_FILE = $(PCH_FILE).gch

# General
LIB_NAME:= bhy
LIB_DEFINES:= -DBHY_EXPORT -dynamiclib
LIB_INCLUDES:= -I./engine/src/ -I./engine/lib/ -I./engine/lib/imgui/ -I./engine/lib/imgui/backends -I/usr/local/include
LIB_LINKERS:= -lglfw -lvulkan -ldl -lpthread -lX11 -lXxf86vm -lXrandr -lXi
LIB_CPP_FILES := $(wildcard $(shell find ./engine/src -name '*.cpp'))
LIB_OUTPUT := $(BUILD_DIR)/lib$(LIB_NAME).dylib

# --ImGui source files--
# TODO make this part of pch compile
IMGUI_DIR = ./engine/lib/imgui
IMGUI_BACKENDS_DIR = $(IMGUI_DIR)/backends
IMGUI_SRC_FILES = $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui_draw.cpp $(IMGUI_DIR)/imgui_widgets.cpp $(IMGUI_DIR)/imgui_tables.cpp $(IMGUI_BACKENDS_DIR)/imgui_impl_glfw.cpp $(IMGUI_BACKENDS_DIR)/imgui_impl_vulkan.cpp

# --CLIENT--
APP_DEFINES:=
APP_INCLUDES:= -I./client/src/ -I./engine/src/ -I./engine/lib/ -I./engine/lib/imgui/ -I./engine/lib/imgui/backends
APP_LINKERS:= -L$(BUILD_DIR) -l$(LIB_NAME)
APP_CPP_FILES := $(wildcard $(shell find ./client/src -name '*.cpp'))

# --BUILD--
all: shadersCompile engineBuild clientBuild run
    @echo "Built $(LIB_OUTPUT) and $(APP_NAME) in $(BUILD_DIR)/$(APP_NAME)"

release: shadersCompile releaseEngineBuild clientBuild run
    @echo "Built $(LIB_OUTPUT) in $(BUILD_DIR)/$(APP_NAME)"

engine: shadersCompile engineBuild run
    @echo "Built $(LIB_OUTPUT) in $(BUILD_DIR)/$(APP_NAME)"

client: clientBuild run
    @echo "Built $(APP_NAME) in $(BUILD_DIR)/$(APP_NAME)"

gch: $(PCH_GCH_FILE)
    $(CXX) $(CXXFLAGS) -c $(PCH_FILE) $(LIB_INCLUDES)

$(PCH_GCH_FILE): $(PCH_FILE)
    $(CXX) $(CXXFLAGS) -c $(PCH_FILE) $(LIB_INCLUDES)

releaseEngineBuild: $(PCH_GCH_FILE)
    $(CXX) $(CXXFLAGS) -DNDEBUG $(LIB_CPP_FILES) $(IMGUI_SRC_FILES) $(PCH_GCH_FILE) $(LIB_DEFINES) \
  -o $(LIB_OUTPUT) $(LIB_LINKERS) $(LIB_INCLUDES)

# TODO releaseClientBuild

engineBuild: $(PCH_GCH_FILE)
    $(CXX) $(CXXFLAGS) $(LIB_CPP_FILES) $(IMGUI_SRC_FILES) $(PCH_GCH_FILE) $(LIB_DEFINES) \
  -o $(LIB_OUTPUT) $(LIB_LINKERS) $(LIB_INCLUDES)

clientBuild:
    $(CXX) $(CXXFLAGS) $(APP_CPP_FILES) -o \
    $(BUILD_DIR)/$(APP_NAME) $(APP_LINKERS) $(APP_INCLUDES)

shadersCompile: $(SPIRV_DIR)/shader.vert.spv $(SPIRV_DIR)/shader.frag.spv

$(SPIRV_DIR)/shader.vert.spv: $(SHADERS_DIR)/shader.vert | $(SPIRV_DIR)
    @echo "Compiling $< -> $@"
    @glslc -o $@ $<

$(SPIRV_DIR)/shader.frag.spv: $(SHADERS_DIR)/shader.frag | $(SPIRV_DIR)
    @echo "Compiling $< -> $@"
    @glslc -o $@ $<

$(SPIRV_DIR):
    @mkdir -p $(SPIRV_DIR)

shaders: shadersCompile

run:
    $(BUILD_DIR)/$(APP_NAME)

clean:
    rm -rf $(BUILD_DIR)/*
    @echo "Removed contents from $(BUILD_DIR)"