changes on building (clean-up) and emulation code

cleaned up Makefile a bit and made emulation related
parts really conditional on a single flag (EMULATE_READER).

Makefile

@@ -4,42 +4,41 @@ LUADIR=lua
 MUPDFDIR=mupdf
 MUPDFTARGET=build/debug
 MUPDFLIBDIR=$(MUPDFDIR)/$(MUPDFTARGET)
-LDFLAGS=-lm -ldl
 
 # set this to your ARM cross compiler:
 
 CC:=arm-unknown-linux-gnueabi-gcc
-#CC:=gcc
+HOSTCC:=gcc
 
-#ALLCFLAGS:=-g -O0
-ALLCFLAGS:=-O2
+CFLAGS:=-O2
 
 # you can configure an emulation for the (eink) framebuffer here.
 # the application won't use the framebuffer (and the special e-ink ioctls)
 # in that case.
 
-EMULATE_EINKFB_FILE=/tmp/displayfifo
-#EMULATE_EINKFB_FILE=/dev/null
-EMULATE_EINKFB_W=824
-EMULATE_EINKFB_H=1200
+ifdef EMULATE_READER
+CC:=$(HOSTCC)
+EMULATE_READER_W?=824
+EMULATE_READER_H?=1200
+EMU_CFLAGS?=$(shell sdl-config --cflags)
+EMU_CFLAGS+= -DEMULATE_READER \
+	     -DEMULATE_READER_W=$(EMULATE_READER_W) \
+	     -DEMULATE_READER_H=$(EMULATE_READER_H) \
+	
+EMU_LDFLAGS?=$(shell sdl-config --libs)
+endif
 
-CFLAGS= $(ALLCFLAGS) -I$(LUADIR)/src -I$(MUPDFDIR)/ \
-	-DEMULATE_EINKFB_FILE='"$(EMULATE_EINKFB_FILE)"' \
-	-DEMULATE_EINKFB_W=$(EMULATE_EINKFB_W) \
-	-DEMULATE_EINKFB_H=$(EMULATE_EINKFB_H)
-
-# comment in the following line if you want to use the framebuffer emulation:
-
-#CFLAGS+= -DEMULATE_EINKFB
+# standard includes
+KPDFREADER_CFLAGS=$(CFLAGS) -I$(LUADIR)/src -I$(MUPDFDIR)/
 
 # enable tracing output:
 
-#CFLAGS+= -DMUPDF_TRACE
+#KPDFREADER_CFLAGS+= -DMUPDF_TRACE
 
 # for now, all dependencies except for the libc are compiled into the final binary:
 
 kpdfview: kpdfview.o einkfb.o pdf.o blitbuffer.o input.o util.o
-	$(CC) $(LDFLAGS) \
+	$(CC) -lm -ldl $(EMU_LDFLAGS) \
 		kpdfview.o \
 		einkfb.o \
 		pdf.o \
@@ -55,6 +54,13 @@ kpdfview: kpdfview.o einkfb.o pdf.o blitbuffer.o input.o util.o
 	       	$(MUPDFLIBDIR)/libz.a \
 		$(LUADIR)/src/liblua.a -o kpdfview
 
+einkfb.o input.o: %.o: %.c
+	$(CC) -c $(KPDFREADER_CFLAGS) $(EMU_CFLAGS) $< -o $@
+
+kpdfview.o pdf.o blitbuffer.o util.o: %.o: %.c
+	$(CC) -c $(KPDFREADER_CFLAGS) $< -o $@
+
+
 fetchthirdparty:
 	-rmdir mupdf
 	-rmdir lua
@@ -71,31 +77,20 @@ cleanthirdparty:
 	make -C mupdf clean
 
 $(MUPDFDIR)/fontdump.host:
-	make -C mupdf CC=gcc $(MUPDFTARGET)/fontdump
+	make -C mupdf CC="$(HOSTCC)" $(MUPDFTARGET)/fontdump
 	cp -a $(MUPDFLIBDIR)/fontdump $(MUPDFDIR)/fontdump.host
 	make -C mupdf clean
 
 $(MUPDFDIR)/cmapdump.host:
-	make -C mupdf CC=gcc $(MUPDFTARGET)/cmapdump
+	make -C mupdf CC="$(HOSTCC)" $(MUPDFTARGET)/cmapdump
 	cp -a $(MUPDFLIBDIR)/cmapdump $(MUPDFDIR)/cmapdump.host
 	make -C mupdf clean
 
 thirdparty: $(MUPDFDIR)/cmapdump.host $(MUPDFDIR)/fontdump.host
-	make -C lua/src CC="$(CC)" CFLAGS="$(ALLCFLAGS)" MYCFLAGS=-DLUA_USE_LINUX MYLIBS="-Wl,-E" liblua.a
-	# generate cmapdump and fontdump helpers.
-	# those need to be run on the build platform, not the target device.
-	# thus, we override the CC here.
-	make -C mupdf clean
 	# build only thirdparty libs, libfitz and pdf utils, which will care for libmupdf.a being built
-	CC="$(CC)" CFLAGS="$(ALLCFLAGS)" make -C mupdf CMAPDUMP=cmapdump.host FONTDUMP=fontdump.host MUPDF= XPS_APPS=
+	CFLAGS="$(CFLAGS)" make -C mupdf CC="$(CC)" CMAPDUMP=cmapdump.host FONTDUMP=fontdump.host MUPDF= XPS_APPS=
+	make -C lua/src CC="$(CC)" CFLAGS="$(CFLAGS)" MYCFLAGS=-DLUA_USE_LINUX MYLIBS="-Wl,-E" liblua.a
 
 install:
 	# install to kindle using USB networking
 	scp kpdfview reader.lua alt_getopt.lua root@192.168.2.2:/mnt/us/test/
-
-display:
-	# run mplayer on a FIFO, fed by using the framebuffer emulation
-	# make a FIFO
-	[ -p $(EMULATE_EINKFB_FILE) ] || mknod $(EMULATE_EINKFB_FILE) p
-	# ...and display from it
-	mplayer -rawvideo format=y8:w=$(EMULATE_EINKFB_W):h=$(EMULATE_EINKFB_H) -demuxer rawvideo $(EMULATE_EINKFB_FILE)