#
# Cross Platform Makefile
# Compatible with MSYS2/MINGW, Ubuntu 14.04.1 and Mac OS X
#
# You will need SDL2 (http://www.libsdl.org):
# Linux:
#   apt-get install libsdl2-dev
# Mac OS X:
#   brew install sdl2
# MSYS2:
#   pacman -S mingw-w64-i686-SDL2
#

#CXX = g++
CXX = clang++

EXE = logmeow
IMGUI_DIR = imgui
SOURCES = $(wildcard *.cpp)
SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui_draw.cpp $(IMGUI_DIR)/imgui_tables.cpp $(IMGUI_DIR)/imgui_widgets.cpp
SOURCES += $(IMGUI_DIR)/misc/cpp/imgui_stdlib.cpp $(IMGUI_DIR)/misc/freetype/imgui_freetype.cpp
SOURCES += $(IMGUI_DIR)/backends/imgui_impl_sdl.cpp $(IMGUI_DIR)/backends/imgui_impl_opengl3.cpp
OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
UNAME_S := $(shell uname -s)
LINUX_GL_LIBS = -lGL

CXXFLAGS += -fsanitize=undefined,thread -std=c++20 -I$(IMGUI_DIR) -I$(IMGUI_DIR)/misc/cpp -I$(IMGUI_DIR)/backends -D'IMGUI_USER_CONFIG="../myimconfig.h"'
# https://t.me/NightShadowsHangout/670691
CXXFLAGS += -g -Werror -Wall -Wextra -Wshadow -Wpedantic -Wno-gnu-anonymous-struct -fno-rtti -fPIC -Wconversion -Wno-unused-parameter -Wimplicit-fallthrough
# https://sourceforge.net/p/valgrind/mailman/valgrind-users/thread/Ygze8PzaQAYWlKDj%40wildebeest.org/
CXXFLAGS += -gdwarf-4
LIBS =

##---------------------------------------------------------------------
## OPENGL ES
##---------------------------------------------------------------------

## This assumes a GL ES library available in the system, e.g. libGLESv2.so
# CXXFLAGS += -DIMGUI_IMPL_OPENGL_ES2
# LINUX_GL_LIBS = -lGLESv2
## If you're on a Raspberry Pi and want to use the legacy drivers,
## use the following instead:
# LINUX_GL_LIBS = -L/opt/vc/lib -lbrcmGLESv2

##---------------------------------------------------------------------
## BUILD FLAGS PER PLATFORM
##---------------------------------------------------------------------

ifeq ($(UNAME_S), Linux) #LINUX
	LIBS += $(LINUX_GL_LIBS) -ldl `sdl2-config --libs` `pkg-config --libs freetype2 fontconfig` -lpcre2-8 -lpcre2-posix

	CXXFLAGS += `sdl2-config --cflags` `pkg-config --cflags freetype2` -DUSE_FONTCONFIG
	CFLAGS = $(CXXFLAGS)
endif

ifeq ($(UNAME_S), Darwin) #APPLE
	LIBS += -framework OpenGL -framework Cocoa -framework IOKit -framework CoreVideo `sdl2-config --libs` `pkg-config --libs freetype2` -lpcre2-8 -lpcre2-posix
	LIBS += -L/usr/local/lib -L/opt/local/lib

	CXXFLAGS += `sdl2-config --cflags` `pkg-config --cflags freetype2`
	CXXFLAGS += -I/usr/local/include -I/opt/local/include
	CFLAGS = $(CXXFLAGS)
endif

ifeq ($(OS), Windows_NT)
	LIBS += -lgdi32 -lopengl32 -limm32 `pkg-config --static --libs sdl2 freetype2` -lpcre2-8 -lpcre2-posix

	CXXFLAGS += `pkg-config --cflags sdl2 freetype2`
	CFLAGS = $(CXXFLAGS)
endif

##---------------------------------------------------------------------
## BUILD RULES
##---------------------------------------------------------------------

$(EXE): $(OBJS)
	$(CXX) -o $@ $^ $(CXXFLAGS) -fuse-ld=lld $(LIBS)

%.o:%.cpp
	$(CXX) $(CXXFLAGS) -c -o $@ $<

# dear imgui has some fucky wucky with -Wconversion, hence -Wno-conversion
%.o:$(IMGUI_DIR)/%.cpp
	$(CXX) $(CXXFLAGS) -Wno-conversion -c -o $@ $<

%.o:$(IMGUI_DIR)/misc/cpp/%.cpp
	$(CXX) $(CXXFLAGS) -Wno-conversion -c -o $@ $<

%.o:$(IMGUI_DIR)/misc/freetype/%.cpp
	$(CXX) $(CXXFLAGS) -Wno-conversion -c -o $@ $<

%.o:$(IMGUI_DIR)/backends/%.cpp
	$(CXX) $(CXXFLAGS) -Wno-conversion -c -o $@ $<

clean:
	rm -f $(EXE) $(OBJS)