Revive Amiga port for NetHack 3.7

Update the Amiga Intuition window port (AMII/AMIV) for the 3.7
window_procs API. Key changes:

- Update all window function signatures for 3.7
- Add assembly trampolines for AmigaOS register-based callbacks
- Convert all K&R function definitions to C99
- Add cross-compilation build system (cross-pre1/pre2/post.370)
  using bebbo's m68k-amigaos-gcc with -noixemul -std=gnu17 -m68000
- Clipping fixes: viewport centering, simplified ScrollRaster,
  duplicate Ctrl-R suppression, glyph buffer invalidation
- Add menucolor support in menu rendering
- Move native txt2iff.c and xpm2iff.c to outdated/
- Add nethack.cnf and README.amiga

sys/unix/hints/include/cross-post.370

@@ -229,6 +229,76 @@ mipspkg: dodata $(GAMEBIN) $(TARGETPFX)recover
 	@echo MIPS package zip file $(TARGETPFX)nh370mips.zip
 endif  # CROSS_TO_MIPS
 
+
+ifdef CROSS_TO_AMIGA
+$(TARGETPFX)amidos.o : ../sys/amiga/amidos.c $(HACK_H)
+$(TARGETPFX)amigst.o : ../sys/amiga/amigst.c $(HACK_H)
+$(TARGETPFX)amirip.o : ../sys/amiga/amirip.c $(HACK_H)
+$(TARGETPFX)amistack.o : ../sys/amiga/amistack.c $(HACK_H)
+$(TARGETPFX)amitty.o : ../sys/amiga/amitty.c $(HACK_H)
+$(TARGETPFX)amiwind.o : ../sys/amiga/amiwind.c \
+		../sys/amiga/amimenu.c $(HACK_H)
+$(TARGETPFX)winami.o : ../sys/amiga/winami.c $(HACK_H)
+$(TARGETPFX)winchar.o : ../sys/amiga/winchar.c tile.c $(HACK_H)
+$(TARGETPFX)winfuncs.o : ../sys/amiga/winfuncs.c $(HACK_H)
+$(TARGETPFX)winkey.o : ../sys/amiga/winkey.c $(HACK_H)
+$(TARGETPFX)winamenu.o : ../sys/amiga/winamenu.c $(HACK_H)
+$(TARGETPFX)winreq.o : ../sys/amiga/winreq.c \
+		../sys/amiga/colorwin.c \
+		../sys/amiga/clipwin.c $(HACK_H)
+$(TARGETPFX)winstr.o : ../sys/amiga/winstr.c $(HACK_H)
+$(GAMEBIN) : $(HOBJ) $(LUACROSSLIB)
+	$(TARGET_LINK) $(TARGET_LFLAGS) -o $(GAMEBIN) \
+	$(HOBJ) $(WINLIB) $(TARGET_LIBS)
+#
+# Host-side IFF tile conversion tools (run on Linux, produce Amiga IFF files)
+#
+AMISRC = ../sys/amiga
+
+$(TARGETPFX)xpm2iff_host: $(AMISRC)/xpm2iff_host.c
+	$(CC) $(CFLAGS) -o $@ $<
+$(TARGETPFX)tomb.iff: $(AMISRC)/grave16.xpm $(TARGETPFX)xpm2iff_host
+	$(TARGETPFX)xpm2iff_host $(AMISRC)/grave16.xpm $@
+
+$(TARGETPFX)bmp2iff_host: $(AMISRC)/bmp2iff_host.c
+	$(CC) $(CFLAGS) -o $@ $<
+$(TARGETPFX)tiles16.iff: ../dat/nhtiles.bmp $(TARGETPFX)bmp2iff_host
+	$(TARGETPFX)bmp2iff_host -planes 4 ../dat/nhtiles.bmp $@
+$(TARGETPFX)tiles32.iff: ../dat/nhtiles.bmp $(TARGETPFX)bmp2iff_host
+	$(TARGETPFX)bmp2iff_host -planes 5 ../dat/nhtiles.bmp $@
+
+AMITILES = $(TARGETPFX)tiles16.iff $(TARGETPFX)tiles32.iff $(TARGETPFX)tomb.iff
+
+.PHONY: amigapkg amitiles
+amitiles: $(AMITILES)
+
+amigapkg: $(AMITILES)
+	mkdir -p $(TARGETPFX)pkg/tiles $(TARGETPFX)pkg/hack
+	cp $(GAMEBIN) $(TARGETPFX)pkg/nethack
+	cp ../dat/nhdat $(TARGETPFX)pkg/nhdat
+	cp ../dat/license $(TARGETPFX)pkg/license
+	cp ../dat/symbols $(TARGETPFX)pkg/symbols
+	cp $(TARGETPFX)tiles16.iff $(TARGETPFX)pkg/tiles/tiles16.iff
+	cp $(TARGETPFX)tiles32.iff $(TARGETPFX)pkg/tiles/tiles32.iff
+	cp $(TARGETPFX)tomb.iff $(TARGETPFX)pkg/tomb.iff
+	cp ../sys/msdos/sysconf $(TARGETPFX)pkg/sysconf
+	cp ../doc/nethack.txt $(TARGETPFX)pkg/nethack.txt
+	( cd $(TARGETPFX)pkg && uudecode ../../../sys/amiga/amifont8.uu && mv 8 hack/8 )
+	( cd $(TARGETPFX)pkg && uudecode ../../../sys/amiga/amifont.uu )
+	cp $(AMISRC)/nethack.cnf $(TARGETPFX)pkg/nethack.cnf
+	-( cd $(TARGETPFX)pkg && test -f ../../../sys/amiga/dflticon.uu && \
+		uudecode ../../../sys/amiga/dflticon.uu )
+	-( cd $(TARGETPFX)pkg && test -f ../../../sys/amiga/NHinfo.uu && \
+		uudecode ../../../sys/amiga/NHinfo.uu )
+	-( cd $(TARGETPFX)pkg && test -f ../../../sys/amiga/NewGame.uu && \
+		uudecode ../../../sys/amiga/NewGame.uu )
+	-( cd $(TARGETPFX)pkg && test -f ../../../sys/amiga/HackWB.uu && \
+		uudecode ../../../sys/amiga/HackWB.uu )
+	touch $(TARGETPFX)pkg/record
+	( cd $(TARGETPFX)pkg && zip -9r ../NH370AMI.ZIP * )
+	@echo amiga package zip file $(TARGETPFX)NH370AMI.ZIP
+endif  # CROSS_TO_AMIGA
+
 ifdef CROSS_SHARED
 # shared file dependencies
 $(TARGETPFX)pcmain.o : ../sys/share/pcmain.c $(HACK_H)