Contributed by Stefan Stapelberg <stefan@RENT-A-GURU.DE> on 2009-01-10

Please find attached the patches to the netrek sound extension for
SGIs.  I have used the AL (audio library) so that I will work on any
IRIX version from 5.2 to 6.5. I have also modified some
sound-unrelated files to have a defined state for the sound engine
after entering the game (e.g. green alert, etc.).

The commands I use to configure the Makefile for netrek on SGI systems
are:

export ac_cv_lib_sun=no ac_cv_lib_sun_getpwnam=no
ac_cv_lib_sun_getmntent=no ac_cv_lib_sun_yp_match=noexport
export ac_cv_lib_gen_getmntent=no ac_cv_lib_socket=no
ac_cv_lib_socket_main=no

export CC=cc
export CFLAGS="-n32 -mips4 -xansi -TARG:platform=IP27:proc=r10000 -O3
-OPT:Olimit=2000:roundoff=3:fast_io=ON -IPA:aggr_cprop=ON
-INLINE:dfe=ON:list=OFF"
export LDFLAGS="-n32 -mips4 -IPA:aggr_cprop=ON -INLINE:dfe=ON:list=OFF
-no_unresolved"

./configure -C \
        --prefix=/usr/local/games/netrek \
        --with-x

*** netrek-client-cow-3.2.8/system.mk	Mon Dec 01 01:09:56 CET 2008
--- netrek-client-cow-3.2.8-sgi/system.mk	Fri Dec 19 22:35:06 CET 2008
***************
*** 4,10 ****
  ############################################################################
  
  SHELL	= /bin/sh
! CC      = cc -n32 -mips4 -xansi
  LN	= ln -s
  
  PROTOIZE   = protoize
--- 4,10 ----
  ############################################################################
  
  SHELL	= /bin/sh
! CC      = cc
  LN	= ln -s
  
  PROTOIZE   = protoize
***************
*** 31,43 ****
  
  # Other libraries neeeded. (All systems need -lX11 -lm)
  
! LIBS            =   -lXpm -lX11 -lm 
  INCS		=  
  
  # Flags for optimizing
  # (-O, -g, -O2)
  
! #OPT             = 
  
  # Flags for shared libraries
  
--- 31,43 ----
  
  # Other libraries neeeded. (All systems need -lX11 -lm)
  
! LIBS            = -lXpm -lX11 -lm -laudio -laudiofile
  INCS		=  
  
  # Flags for optimizing
  # (-O, -g, -O2)
  
! #OPT             = -g -Wall
  
  # Flags for shared libraries
  
***************
*** 94,101 ****
  MAINOBJ 	= main.o
  MAINSRC 	= main.c
  
! X11OBJ	 	=  x11window.o x11sprite.o audio.o
! X11SRC		=  x11window.c x11sprite.c audio.c
  
  WIN32OBJ	= # gnu_win32.o winsprite.o winsndlib.o
  WIN32SRC	= # gnu_win32.c winsprite.c winsndlib.c
--- 94,101 ----
  MAINOBJ 	= main.o
  MAINSRC 	= main.c
  
! X11OBJ	 	=  audio.o x11window.o x11sprite.o
! X11SRC		=  audio.c x11window.c x11sprite.c
  
  WIN32OBJ	= # gnu_win32.o winsprite.o winsndlib.o
  WIN32SRC	= # gnu_win32.c winsprite.c winsndlib.c
***************
*** 113,119 ****
  SHARED 	= $(SL_CFLAGS)
  INCDIRS = $(MPINC) $(INCS)
  CFLAGS = $(OPT) $(EXTRACFLAGS) $(RSA_FLAGS) $(INCDIRS)
! LFLAGS = -g $(EXTRALINKFLAGS)
  LIBRARIES = $(LMP) $(LIBS) $(EXTRALIBS) $(SDL_LIBS) $(SDL_MIXER_LIBS) $(XXF86VM_LIBS) $(IMLIB2_LIBS)
  
  netrek-client-cow: $(RSAOBJ) $(PMAKE) null $(ROBJ) $(MAINOBJ) $(INPUTOBJ) $(X11OBJ) $(WIN32OBJ)  $(RANDOMOBJ) cflags.c
--- 113,119 ----
  SHARED 	= $(SL_CFLAGS)
  INCDIRS = $(MPINC) $(INCS)
  CFLAGS = $(OPT) $(EXTRACFLAGS) $(RSA_FLAGS) $(INCDIRS)
! LFLAGS = $(EXTRALINKFLAGS)
  LIBRARIES = $(LMP) $(LIBS) $(EXTRALIBS) $(SDL_LIBS) $(SDL_MIXER_LIBS) $(XXF86VM_LIBS) $(IMLIB2_LIBS)
  
  netrek-client-cow: $(RSAOBJ) $(PMAKE) null $(ROBJ) $(MAINOBJ) $(INPUTOBJ) $(X11OBJ) $(WIN32OBJ)  $(RANDOMOBJ) cflags.c
***************
*** 131,162 ****
  	$(TOUCH) done.libcow
  
  #rsa_box.c: mkkey $(SECKEYFILE)
! $(RSASRC): mkkey $(SECKEYFILE)
! 	-$(RM) $(RSASRC)
! 	./mkkey -c -k $(SECKEYFILE)
! 	$(TOUCH) $(RSASRC)
! 	@echo "int sock = -1;" >>rsa_box_1.c
! 
! $(SECKEYFILE):
! 	@echo WARNING: No keyfile found, generating a new key.
! 	@echo "         You have 5 seconds time to abort"
! 	sleep 5
! 	$(MAKE) newkey
  
  mkkey: mkkey.c $(RANDOMOBJ) defs.h
  	$(CC) $(CFLAGS) $(MPINC) $(MPLIB) -o mkkey mkkey.c $(RANDOMOBJ) $(LIBRARIES)
  
  randomize: randomize.c $(RANDOMOBJ) defs.h
! 	$(CC) $(OPT) -o randomize randomize.c $(RANDOMOBJ) $(LIBRARIES)
  
  sound.o: sound.c
! 	$(CC) $(SDL_CFLAGS) -c sound.c
  
  random.o: random.c
! 	$(CC) -c -O random.c
  
  strdup.o: strdup.c
! 	$(CC) -c -O strdup.c
  
  cflags.c: mkcflags
  	./mkcflags "$(CC) $(CFLAGS)" "$(ARCH)"  > cflags.c
--- 131,162 ----
  	$(TOUCH) done.libcow
  
  #rsa_box.c: mkkey $(SECKEYFILE)
! #$(RSASRC): mkkey $(SECKEYFILE)
! #	-$(RM) $(RSASRC)
! #	./mkkey -c -k $(SECKEYFILE)
! #	$(TOUCH) $(RSASRC)
! #	@echo "int sock = -1;" >>rsa_box_1.c
! #
! #$(SECKEYFILE):
! #	@echo WARNING: No keyfile found, generating a new key.
! #	@echo "         You have 5 seconds time to abort"
! #	sleep 5
! #	$(MAKE) newkey
  
  mkkey: mkkey.c $(RANDOMOBJ) defs.h
  	$(CC) $(CFLAGS) $(MPINC) $(MPLIB) -o mkkey mkkey.c $(RANDOMOBJ) $(LIBRARIES)
  
  randomize: randomize.c $(RANDOMOBJ) defs.h
! 	$(CC) $(CFLAGS) -o randomize randomize.c $(RANDOMOBJ) $(LIBRARIES)
  
  sound.o: sound.c
! 	$(CC) $(CFLAGS) -c sound.c
  
  random.o: random.c
! 	$(CC) $(CFLAGS) -c random.c
  
  strdup.o: strdup.c
! 	$(CC) $(CFLAGS) -c strdup.c
  
  cflags.c: mkcflags
  	./mkcflags "$(CC) $(CFLAGS)" "$(ARCH)"  > cflags.c