SDLDEVEL = SDL-devel-1.2.15-mingw32.tar.gz
SDLDEVELURL = https://www.libsdl.org/release/$(SDLDEVEL)
SDLDEVELPATCH = SDL-1.2.15.patch
SDLIMAGE = SDL_image-1.2.12
SDLIMAGEARCH = SDL_image-1.2.12.tar.gz
SDLIMAGEURL = https://www.libsdl.org/projects/SDL_image/release/$(SDLIMAGEARCH)
LIBPNG = libpng-1.6.32
LIBPNGARCH = $(LIBPNG).tar.gz
LIBPNGURL = https://download.sourceforge.net/libpng/$(LIBPNGARCH)
JPEGVER = 9c
JPEGDIR = jpeg-$(JPEGVER)
JPEGARCH = jpegsrc.v$(JPEGVER).tar.gz
JPEGURL = http://www.ijg.org/files/$(JPEGARCH)
LIBTIFF = tiff-v3.4
LIBTIFFARCH = $(LIBTIFF)-tar.gz
LIBTIFFURL = ftp://ftp.sgi.com/graphics/tiff/$(LIBTIFFARCH)
ZLIB=zlib-1.2.11
ZLIBARCH=$(ZLIB).tar.gz
ZLIBURL=https://www.zlib.net/$(ZLIBARCH)
# https://storage.googleapis.com/downloads.webmproject.org/releases/webp/libwebp-0.6.1.tar.gz

PREFIX = $(PWD)/usr

MKDIR = mkdir -p
TAR = $(shell which tar)
GETURL = $(shell which wget || echo "curl -O -L")

BUILD_CC := $(CC)

ifdef WIN32CROSS
CROSS_CC ?= $(shell which i686-w64-mingw32-gcc || which mingw32-gcc)
CROSS_AR ?= $(shell which i686-w64-mingw32-ar || which mingw32-ar)
CROSS_RANLIB ?= $(shell which i686-w64-mingw32-ranlib || which mingw32-ranlib)
CC = $(CROSS_CC)
AR = $(CROSS_AR)
RANLIB = $(CROSS_RANLIB)
endif

HOST = $(shell $(CC) -dumpmachine)
#HOST = i686-pc-mingw32

.PHONY:	all clean libs libpng libsdl libsdl_image libjpeg libtiff zlib

all:	libs

clean:
	$(RM) -r archives $(LIBPNG) $(ZLIB) $(SDLIMAGE) $(JPEGDIR) $(LIBTIFF)

libs:	libpng libsdl libsdl_image
libsdl:	$(PREFIX)/lib/libSDLmain.a
libsdl_image:	$(PREFIX)/lib/libSDL_image.a
libjpeg:	$(PREFIX)/lib/libjpeg.a
libpng:	$(PREFIX)/lib/libpng.a
libtiff:	$(PREFIX)/lib/libtiff.a
zlib:	$(PREFIX)/lib/libz.a

$(PREFIX)/lib/libSDLmain.a:	archives/$(SDLDEVEL)
	$(TAR) xzf $<
	patch -p0 < $(SDLDEVELPATCH)
	cd SDL-1.2.15 && CROSS_PATH=$(PREFIX) $(MAKE) cross

$(PREFIX)/lib/libSDL_image.a:	$(PREFIX)/lib/libjpeg.a
$(PREFIX)/lib/libSDL_image.a:	$(PREFIX)/lib/libtiff.a
$(PREFIX)/lib/libSDL_image.a:	$(PREFIX)/lib/libpng.a

$(PREFIX)/lib/libSDL_image.a:	$(SDLIMAGE)/.ok
	cd $(SDLIMAGE) && CC=$(CC) CPPFLAGS=-I$(PREFIX)/include LDFLAGS=-L$(PREFIX)/lib LIBPNG_CFLAGS= LIBPNG_LIBS=-lpng ./configure --prefix=$(PREFIX) --with-sdl-prefix=$(PREFIX) --host=$(HOST) --disable-webp
	cd $(SDLIMAGE) && $(MAKE)
	cd $(SDLIMAGE) && $(MAKE) install

$(SDLIMAGE)/.ok:	archives/$(SDLIMAGEARCH)
	$(TAR) xzf $<
	touch $@

$(PREFIX)/lib/libjpeg.a:	$(JPEGDIR)/.ok
	cd $(JPEGDIR) && CC=$(CC) ./configure --prefix=$(PREFIX) --host=$(HOST)
	cd $(JPEGDIR) && $(MAKE)
	cd $(JPEGDIR) && $(MAKE) install

$(JPEGDIR)/.ok:	archives/$(JPEGARCH)
	$(TAR) xzf $<
	touch $@

$(PREFIX)/lib/libtiff.a:	$(PREFIX)/lib/libjpeg.a

$(PREFIX)/lib/libtiff.a:	$(LIBTIFF)/.ok
	cd $(LIBTIFF)/libtiff && mv Makefile.in Makefile.in.orig
	cd $(LIBTIFF)/libtiff && sed 's/[^	]*[ ]\(-o mk[^ ]*\)/$(subst /,\/,$(BUILD_CC)) \1/' Makefile.in.orig > Makefile.in
	cd $(LIBTIFF) && mv configure configure.orig
	cd $(LIBTIFF) && sed 's/^\(DIR.*=\).usr.local\(.*\)/\1$(subst /,\/,$(PREFIX))\2/' configure.orig | sed 's/^\(NONINTERACTIVE=\)no/\1yes/' | sed 's/^\(DIR_JPEGLIB=\)[^#]*/\1$(subst /,\/,$(PREFIX))\/lib/' > configure
	cd $(LIBTIFF) && chmod +x configure
	cd $(LIBTIFF) && CC=$(CC) AR=$(AR) RANLIB=$(RANLIB) GCOPT=-g ./configure --target=$(HOST)
	cd $(LIBTIFF) && $(MAKE)
	cd $(LIBTIFF) && $(MAKE) install

$(LIBTIFF)/.ok:	archives/$(LIBTIFFARCH)
	$(TAR) xzf $<
	touch $@
	
$(PREFIX)/lib/libpng.a:	$(PREFIX)/lib/libz.a

$(PREFIX)/lib/libpng.a:	$(LIBPNG)/.ok
	cd $(LIBPNG) && CC=$(CC) CPPFLAGS=-I$(PREFIX)/include LDFLAGS=-L$(PREFIX)/lib ./configure --prefix=$(PREFIX) --host=$(HOST)
	cd $(LIBPNG) && $(MAKE)
	cd $(LIBPNG) && $(MAKE) install

$(LIBPNG)/.ok:	archives/$(LIBPNGARCH)
	$(TAR) xzf $<
	touch $@

$(PREFIX)/lib/libz.a:	$(ZLIB)/.ok
	cd $(ZLIB) && $(MAKE) -fwin32/Makefile.gcc PREFIX=$(shell echo $(CC) | sed 's/^\(.*\)gcc/\1/')
	cd $(ZLIB) && INCLUDE_PATH=$(PREFIX)/include LIBRARY_PATH=$(PREFIX)/lib BINARY_PATH=$(PREFIX)/bin $(MAKE) install -fwin32/Makefile.gcc SHARED_MODE=1

$(ZLIB)/.ok:	archives/$(ZLIBARCH)
	$(TAR) xzf $<
	touch $@

archives/$(LIBPNGARCH):
	@$(MKDIR) $(@D)
	cd $(@D) && $(GETURL) $(LIBPNGURL)

archives/$(SDLDEVEL):
	@$(MKDIR) $(@D)
	cd $(@D) && $(GETURL) $(SDLDEVELURL)

archives/$(SDLIMAGEARCH):
	@$(MKDIR) $(@D)
	cd $(@D) && $(GETURL) $(SDLIMAGEURL)

archives/$(JPEGARCH):
	@$(MKDIR) $(@D)
	cd $(@D) && $(GETURL) $(JPEGURL)

archives/$(LIBTIFFARCH):
	@$(MKDIR) $(@D)
	cd $(@D) && $(GETURL) $(LIBTIFFURL)

archives/$(ZLIBARCH):
	@$(MKDIR) $(@D)
	cd $(@D) && $(GETURL) $(ZLIBURL)