libnethack pr385

roll parts of pr385 into source tree

This does not take the PR as is.

Unlike the PR, this streamlines and minimizes the integration somewhat:

- use hints/include mechanism instead of creating alternative
  Makefile.dat, Makefile.src, Makefile.top, Makefile.utl in sys/lib;
  those would have been a maintenance nightmare.

- don't have alternative mkmkfile.sh and setup.sh in sys/lib.

- sys/lib/libnethackmain.c differed from sys/unix/unixmain.c by
  very little, so just place a small bit of conditional code at the
  top of sys/unix/unixmain.c instead.

- changed the conditional code bits from __EMSCRIPTEN__ to
  CROSS_TO_WASM.

- You should be able to build the wasm result by:
    cd sys/unix ; sh setup.sh hints/linux.2020 ; cd ../..
    make fetch-lua    (<-one time)
    make WANT_LIBNH all

- You should be able to build LIBNBH by:
    cd sys/unix ; sh setup.sh hints/linux.2020 ; cd ../..
    make fetch-lua    (<-one time)
    make CROSS_TO_WASM=1 all

As it is currently coded, winshim.c requires C99.

sys/unix/hints/include/cross-post.2020

@@ -18,9 +18,9 @@ $(TARGETPFX)vidvesa.o : ../sys/msdos/vidvesa.c ../sys/msdos/portio.h \
 $(TARGETPFX)vidstub.o : ../sys/msdos/vidvesa.c ../sys/msdos/portio.h \
 		$(HACK_H)
 $(TARGETPFX)tile.o : tile.c
-$(GAMEBIN) : $(HOBJ)
+$(GAMEBIN) : $(HOBJ) $(LUACROSSLIB)
 	$(TARGET_LINK) $(TARGET_LFLAGS) -o $(GAMEBIN) \
-	$(HOBJ) $(WINLIB) $(TARGET_LIBS) $(LUALIB)
+	$(HOBJ) $(WINLIB) $(TARGET_LIBS)
 #
 .PHONY: dospkg
 dospkg: $(GAMEBIN) $(TARGETPFX)recover.exe ../dat/nhtiles.bmp
@@ -81,9 +81,9 @@ $(TARGETPFX)monsters.iff: ../win/share/monsters.txt ../util/txt2iff
 	../util/txt2iff ../win/share/monsters.txt $@
 $(TARGETPFX)other.iff: ../win/share/other.txt ../util/txt2iff
 	../util/txt2iff ../win/share/other.txt $@
-$(GAMEBIN) : $(HOBJ)
+$(GAMEBIN) : $(HOBJ) $(LUACROSSLIB)
 	$(TARGET_LINK) $(TARGET_LFLAGS) -o $(GAMEBIN) \
-	$(HOBJ) $(WINLIB) $(TARGET_LIBS) $(LUALIB)
+	$(HOBJ) $(WINLIB) $(TARGET_LIBS)
 #
 .PHONY: amigapkg
 amigapkg: $(GAMEBIN) $(TARGETPFX)recover.exe ../dat/nhtiles.bmp
@@ -119,6 +119,34 @@ amigapkg: $(GAMEBIN) $(TARGETPFX)recover.exe ../dat/nhtiles.bmp
 	@echo amiga package zip file $(TARGETPFX)NH370AMI.ZIP
 endif  # CROSS_TO_AMIGA
 
+ifdef CROSS_TO_WASM
+$(WASM_TARGET): $(HOBJ) $(LUACROSSLIB) Makefile $(WASM_DATA_DIR)
+	-rm $@
+	$(TARGET_CC) $(EMCC_LFLAGS) $(EMCC_CFLAGS) -o $@ \
+		$(HOBJ) $(TARGET_LIBS)
+
+$(WASM_DATA_DIR):
+	-mkdir -p $(WASM_DATA_DIR)
+	touch $(WASM_DATA_DIR)/perm
+	touch $(WASM_DATA_DIR)/record
+	touch $(WASM_DATA_DIR)/logfile
+	touch $(WASM_DATA_DIR)/xlogfile
+	( cd ..; $(MAKE) dlb )
+	( cd ..; $(MAKE) dofiles-dlb )
+	cp ../sys/lib/sysconf $(WASM_DATA_DIR)/sysconf
+#
+.PHONY: wasmpkg
+wasmpkg:
+	@echo "$(WASM_TARGET) done."
+$(TARGETPFX)unixmain.o : ../sys/unix/unixmain.c $(HACK_H)
+$(TARGETPFX)unixres.o : ../sys/unix/unixres.c $(HACK_H)
+$(TARGETPFX)unixunix.o : ../sys/unix/unixunix.c $(HACK_H)
+$(TARGETPFX)ioctl.o : ../sys/share/ioctl.c $(HACK_H)
+$(TARGETPFX)unixtty.o : ../sys/share/unixtty.c $(HACK_H)
+$(TARGETPFX)winshim.o : ../win/shim/winshim.c $(HACK_H)
+endif  # CROSS_TO_WASM
+#
+
 ifdef CROSS_SHARED
 # shared file dependencies
 $(TARGETPFX)pcmain.o : ../sys/share/pcmain.c $(HACK_H)
@@ -141,12 +169,9 @@ $(LUACROSSLIB): $(LUALIBOBJS)
 	$(TARGET_AR) rcS $@ $(LUAOBJFILES2)
 	$(TARGET_AR) rcS $@ $(LUAOBJFILES3)
 	$(TARGET_AR) rcs $@ $(LUAOBJFILES4)
-ifdef WANT_WIN_CURSES
-$(TARGETPFX)pdclib.a : $(PDCLIBOBJS) $(PDCOBJS)
-	if [ -f $@ ]; then rm $@; fi;
-	$(TARGET_AR) rcs $@ $(PDCLIBOBJS) $(PDCOBJS)
-endif
-#
+
+#	$(TARGET_AR) rcs $@ $(LUALIBOBJS)
+
 # Lua src
 $(TARGETPFX)lapi.o : $(LUATOP)/src/lapi.c
 $(TARGETPFX)lauxlib.o : $(LUATOP)/src/lauxlib.c
@@ -184,6 +209,11 @@ $(TARGETPFX)lzio.o : $(LUATOP)/src/lzio.c
 endif  # BUILD_LUA
 
 ifdef BUILD_PDCURSES
+ifdef WANT_WIN_CURSES
+$(TARGETPFX)pdclib.a : $(PDCLIBOBJS) $(PDCOBJS)
+	if [ -f $@ ]; then rm $@; fi;
+	$(TARGET_AR) rcs $@ $(PDCLIBOBJS) $(PDCOBJS)
+endif
 # PDCurses src
 $(TARGETPFX)addch.o : $(PDCTOP)/pdcurses/addch.c
 $(TARGETPFX)addchstr.o : $(PDCTOP)/pdcurses/addchstr.c