# GNU Makefile for cross-compiling quakespasm.exe (Win64: MinGW-w64)
# using cross-toolchains on a linux host, Sep. 10, 2014
# "make DEBUG=1" to build a debug client.
# "make SDL_CONFIG=/path/to/sdl-config" for unusual SDL installations.
# "make WINSOCK2=0" to use the old WinSock 1.1 api (NOT recommended).

### Enable/disable SDL2
USE_SDL2=0

### Enable/disable codecs for streaming music support
USE_CODEC_WAVE=1
USE_CODEC_FLAC=1
USE_CODEC_MP3=1
USE_CODEC_VORBIS=1
USE_CODEC_OPUS=1
# either mikmod (preferred) or modplug, not both
USE_CODEC_MIKMOD=1
USE_CODEC_MODPLUG=0
USE_CODEC_UMX=1

# which library to use for mp3 decoding: mad or mpg123
MP3LIB=mad
# which library to use for ogg decoding: vorbis or tremor
VORBISLIB=vorbis

# ---------------------------
# Helper functions
# ---------------------------

check_gcc = $(shell if echo | $(CC) $(1) -Werror -S -o /dev/null -xc - > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi;)

# ---------------------------

DEBUG   ?= 0
WINSOCK2?= 1

# ---------------------------
# build variables
# ---------------------------

TARGET=x86_64-w64-mingw32

CROSS_COMPILE=1

ifeq ($(CROSS_COMPILE),1)
TOOLCHAIN_PREFIX=$(TARGET)-
else
TOOLCHAIN_PREFIX=
endif

CC = $(TOOLCHAIN_PREFIX)gcc
LINKER = $(CC)
WINDRES = $(TOOLCHAIN_PREFIX)windres

STRIP = $(TOOLCHAIN_PREFIX)strip

CPUFLAGS=
LDFLAGS =
DFLAGS ?=
CFLAGS ?= -Wall -Wno-trigraphs
CFLAGS += $(CPUFLAGS)

ifneq ($(DEBUG),0)
DFLAGS += -DDEBUG
CFLAGS += -g
do_strip=
else
DFLAGS += -DNDEBUG
CFLAGS += -O2
CFLAGS += $(call check_gcc,-fweb,)
CFLAGS += $(call check_gcc,-frename-registers,)
cmd_strip=$(STRIP) $(1)
define do_strip
	$(call cmd_strip,$(1));
endef
endif

ifeq ($(USE_SDL2),1)
CFLAGS += -DUSE_SDL2
endif

ifeq ($(USE_SDL2),1)
SDL_CONFIG ?= sdl2-config
else
SDL_CONFIG ?= sdl-config
endif
SDL_CFLAGS := $(shell $(SDL_CONFIG) --cflags)
SDL_LIBS   := $(shell $(SDL_CONFIG) --libs)

ifeq ($(WINSOCK2),1)
DEFWINSOCK :=-D_USE_WINSOCK2
LIBWINSOCK := -lws2_32
else
DEFWINSOCK :=
LIBWINSOCK := -lwsock32
endif

CFLAGS     += $(DEFWINSOCK)
NET_LIBS   := $(LIBWINSOCK)

ifneq ($(VORBISLIB),vorbis)
ifneq ($(VORBISLIB),tremor)
$(error Invalid VORBISLIB setting)
endif
endif
ifneq ($(MP3LIB),mpg123)
ifneq ($(MP3LIB),mad)
$(error Invalid MP3LIB setting)
endif
endif
ifeq ($(MP3LIB),mad)
mp3_obj=snd_mp3.o
lib_mp3dec=-lmad
endif
ifeq ($(MP3LIB),mpg123)
mp3_obj=snd_mpg123.o
lib_mp3dec=-lmpg123
endif
ifeq ($(VORBISLIB),vorbis)
cpp_vorbisdec=
lib_vorbisdec=-lvorbisfile -lvorbis -logg
endif
ifeq ($(VORBISLIB),tremor)
cpp_vorbisdec=-DVORBIS_USE_TREMOR
lib_vorbisdec=-lvorbisidec -logg
endif

CODECLIBS  :=
ifeq ($(USE_CODEC_WAVE),1)
CFLAGS+= -DUSE_CODEC_WAVE
endif
ifeq ($(USE_CODEC_FLAC),1)
CFLAGS+= -DUSE_CODEC_FLAC
CODEC_INC = -I../Windows/codecs/include
CODEC_LINK= -L../Windows/codecs/x64
CODECLIBS+= -lFLAC
endif
ifeq ($(USE_CODEC_OPUS),1)
CFLAGS+= -DUSE_CODEC_OPUS
CODEC_INC = -I../Windows/codecs/include
CODEC_LINK= -L../Windows/codecs/x64
CODECLIBS+= -lopusfile -lopus -logg
endif
ifeq ($(USE_CODEC_VORBIS),1)
CFLAGS+= -DUSE_CODEC_VORBIS $(cpp_vorbisdec)
CODEC_INC = -I../Windows/codecs/include
CODEC_LINK= -L../Windows/codecs/x64
CODECLIBS+= $(lib_vorbisdec)
endif
ifeq ($(USE_CODEC_MP3),1)
CFLAGS+= -DUSE_CODEC_MP3
CODEC_INC = -I../Windows/codecs/include
CODEC_LINK= -L../Windows/codecs/x64
CODECLIBS+= $(lib_mp3dec)
endif
ifeq ($(USE_CODEC_MIKMOD),1)
CFLAGS+= -DUSE_CODEC_MIKMOD
CODEC_INC = -I../Windows/codecs/include
CODEC_LINK= -L../Windows/codecs/x64
CODECLIBS+= -lmikmod
endif
ifeq ($(USE_CODEC_MODPLUG),1)
CFLAGS+= -DUSE_CODEC_MODPLUG
CODEC_INC = -I../Windows/codecs/include
CODEC_LINK= -L../Windows/codecs/x64
CODECLIBS+= -lmodplug
endif
ifeq ($(USE_CODEC_UMX),1)
CFLAGS+= -DUSE_CODEC_UMX
endif
CFLAGS+= $(CODEC_INC)

COMMON_LIBS:= -lm -lopengl32

LIBS := $(COMMON_LIBS) $(NET_LIBS) $(CODEC_LINK) $(CODECLIBS)

# ---------------------------
# targets
# ---------------------------

.PHONY:	clean debug release

DEFAULT_TARGET := quakespasm.exe

# ---------------------------
# rules
# ---------------------------

%.o:	%.c
	$(CC) $(DFLAGS) -c $(CFLAGS) $(SDL_CFLAGS) -o $@ $^
%.res:	../Windows/%.rc
	$(WINDRES) --output-format=coff -I../Windows -o $@ $^

# ----------------------------------------------------------------------------
# objects
# ----------------------------------------------------------------------------

MUSIC_OBJS:= bgmusic.o \
	snd_codec.o \
	snd_flac.o \
	snd_wave.o \
	snd_vorbis.o \
	snd_opus.o \
	$(mp3_obj) \
	snd_mikmod.o \
	snd_modplug.o \
	snd_umx.o
COMOBJ_SND := snd_dma.o snd_mix.o snd_mem.o $(MUSIC_OBJS)
SYSOBJ_SND := snd_sdl.o
SYSOBJ_CDA := cd_sdl.o
SYSOBJ_INPUT := in_sdl.o
SYSOBJ_GL_VID:= gl_vidsdl.o
SYSOBJ_NET := net_win.o net_wins.o net_wipx.o
SYSOBJ_SYS := pl_win.o sys_sdl_win.o
SYSOBJ_MAIN:= main_sdl.o
SYSOBJ_RES := QuakeSpasm.res

GLOBJS = \
	gl_refrag.o \
	gl_rlight.o \
	gl_rmain.o \
	gl_fog.o \
	gl_rmisc.o \
	r_part.o \
	r_world.o \
	gl_screen.o \
	gl_sky.o \
	gl_warp.o \
	$(SYSOBJ_GL_VID) \
	gl_draw.o \
	image.o \
	gl_texmgr.o \
	gl_mesh.o \
	r_sprite.o \
	r_alias.o \
	r_brush.o \
	gl_model.o

OBJS := strlcat.o \
	strlcpy.o \
	$(GLOBJS) \
	$(SYSOBJ_INPUT) \
	$(COMOBJ_SND) \
	$(SYSOBJ_SND) \
	$(SYSOBJ_CDA) \
	$(SYSOBJ_NET) \
	net_dgrm.o \
	net_loop.o \
	net_main.o \
	chase.o \
	cl_demo.o \
	cl_input.o \
	cl_main.o \
	cl_parse.o \
	cl_tent.o \
	console.o \
	keys.o \
	menu.o \
	sbar.o \
	view.o \
	wad.o \
	cmd.o \
	common.o \
	crc.o \
	cvar.o \
	cfgfile.o \
	host.o \
	host_cmd.o \
	mathlib.o \
	pr_cmds.o \
	pr_edict.o \
	pr_exec.o \
	sv_main.o \
	sv_move.o \
	sv_phys.o \
	sv_user.o \
	world.o \
	zone.o \
	$(SYSOBJ_SYS) $(SYSOBJ_MAIN) $(SYSOBJ_RES)

# ------------------------
# MinGW-w64 build rules
# ------------------------

quakespasm.exe:	$(OBJS)
	$(LINKER) $(OBJS) $(LDFLAGS) $(LIBS) $(SDL_LIBS) -o $@
	$(call do_strip,$@)

release:	quakespasm.exe
debug:
	$(error Use "make DEBUG=1")

clean:
	rm -f $(shell find . \( -name '*~' -o -name '#*#' -o -name '*.o' -o -name '*.res' -o -name $(DEFAULT_TARGET) \) -print)