I got this tree to build under Solaris, AIX, IRIX, & Linux.

In order to do so I:
* included strings.h and string.h in many files so various functions would be
defined
* Fixed model_t collision problem in cl_main.c (Solaris)
* com.c - corrected WORDS_BIGENDIAN spelling
* gl_draw.c - Use HAVE_GL_COLOR_INDEX8_EXT to avoid referencing
GL_COLOR_INDEX8_EXT when it isn't available
* net_udp.c - use socklen_t to appease AIX

source/Makefile.am

@@ -17,21 +17,35 @@ libqfsys_cl_a_SOURCES = sys_unix.c cl_sys_unix.c
 libqfsys_sv_a_SOURCES = sys_unix.c sv_sys_unix.c
 endif
 
+if ASM_ARCH
+MATH_ASM = math.S
+WORLDA_ASM = worlda.S 
+CL_ASM = snd_mixa.S cl_math.S sys_x86.S
+SOFT_ASM = d_draw.S d_draw16.S d_parta.S d_polysa.S d_scana.S \
+	d_spr8.S d_varsa.S r_aclipa.S r_aliasa.S r_drawa.S r_edgea.S \
+	r_varsa.S surf16.S surf8.S
+endif
+
 EXTRA_libqfsys_cl_a_SOURCES = cl_sys_unix.c cl_sys_win.c sys_win.c sys_unix.c fnmatch.c dirent.c
 EXTRA_libqfsys_sv_a_SOURCES = sv_sys_unix.c sv_sys_win.c sys_win.c sys_unix.c fnmatch.c dirent.c
 
 if SNDTYPE_WIN32
-libqfsnd_a_SOURCES = snd_dma.c snd_win.c
+libqfsnd_a_SOURCES = snd_win.c snd_dma.c snd_mem.c snd_mix.c 
-endif
+else
 if SNDTYPE_OSS
-libqfsnd_a_SOURCES = snd_dma.c snd_oss.c
+libqfsnd_a_SOURCES = snd_oss.c snd_dma.c snd_mem.c snd_mix.c 
-endif
+else
 if SNDTYPE_ALSA
-libqfsnd_a_SOURCES = snd_dma.c snd_alsa.c
+libqfsnd_a_SOURCES = snd_alsa.c snd_dma.c snd_mem.c snd_mix.c 
-endif
+else
-if SNDTYPE_NULL
+if SNDTYPE_SUN
+libqfsnd_a_SOURCES = snd_sun.c snd_dma.c snd_mem.c snd_mix.c 
+else
 libqfsnd_a_SOURCES = snd_null.c
 endif
+endif
+endif
+endif
 EXTRA_libqfsnd_a_SOURCES = snd_dma.c snd_win.c snd_oss.c snd_alsa.c snd_null.c
 
 if CDTYPE_WIN32
@@ -46,26 +60,23 @@ endif
 EXTRA_libqfcd_a_SOURCES = cd_win.c cd_linux.c cd_null.c
 
 common_SOURCES= net_chan.c net_com.c net_udp.c pmove.c pmovetst.c zone.c \
-		mdfour.c mathlib.c math.S cvar.c crc.c model.c cmd.c \
+		mdfour.c mathlib.c cvar.c crc.c model.c cmd.c \
 		qargs.c qendian.c quakefs.c quakeio.c msg.c sizebuf.c info.c \
-		checksum.c link.c buildnum.c va.c com.c
+		checksum.c link.c buildnum.c va.c com.c $(MATH_ASM)
 server_SOURCES=	pr_cmds.c pr_edict.c pr_exec.c sv_init.c sv_main.c sv_misc.c \
 		sv_model.c sv_nchan.c sv_ents.c sv_send.c sv_move.c sv_phys.c \
-		sv_user.c sv_ccmds.c world.c worlda.S sv_cvar.c
+		sv_user.c sv_ccmds.c world.c sv_cvar.c $(WORLDA_ASM)
 client_SOURCES= cl_cmd.c cl_cvar.c cl_demo.c cl_ents.c cl_input.c cl_main.c \
-		cl_math.S cl_misc.c cl_parse.c cl_pred.c cl_tent.c cl_cam.c \
+		cl_misc.c cl_parse.c cl_pred.c cl_tent.c cl_cam.c \
-		r_view.c wad.c snd_mem.c snd_mix.c snd_mixa.S \
+		r_view.c wad.c \
 		skin.c sbar.c nonintel.c menu.c keys.c console.c \
-		sys_x86.S cl_slist.c
+                cl_slist.c $(CL_ASM)
 soft_SOURCES=	cl_model.c cl_trans.c d_edge.c d_fill.c d_init.c d_modech.c \
 		d_part.c d_polyse.c d_scan.c d_sky.c d_sprite.c d_surf.c \
 		d_vars.c d_zpoint.c draw.c r_aclip.c r_alias.c r_bsp.c \
 		r_draw.c r_edge.c r_efrag.c r_light.c r_main.c r_misc.c \
 		r_part.c r_sky.c r_sprite.c r_surf.c r_vars.c sw_view.c \
-		screen.c \
+		screen.c $(SOFT_ASM)
-		d_draw.S d_draw16.S d_parta.S d_polysa.S d_scana.S \
-		d_spr8.S d_varsa.S r_aclipa.S r_aliasa.S r_drawa.S r_edgea.S \
-		r_varsa.S surf16.S surf8.S
 ogl_SOURCES=	gl_draw.c gl_mesh.c gl_model.c gl_ngraph.c gl_part.c \
 		gl_refrag.c gl_rlight.c gl_rmain.c gl_rmisc.c gl_rsurf.c \
 		gl_screen.c gl_trans.c gl_view.c gl_warp.c

source/buildnum.c

@@ -32,6 +32,9 @@
 
 #include <stdlib.h>
 #include <string.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 //char *date = "Dec 21 1999";
 static char *date = __DATE__ ;

source/cl_cmd.c

@@ -35,6 +35,9 @@
 #include "msg.h"
 
 #include <string.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 /*
 ===================

source/cl_main.c

@@ -58,6 +58,12 @@
 #include "draw.h"
 #include "qargs.h"
 #include "cdaudio.h"
+
+#ifdef __sun
+/* Sun's model_t in sys/model.h conflicts w/ Quake's model_t */
+#define model_t sunmodel_t
+#endif
+
 #ifdef _WIN32
 #include "winquake.h"
 #include "winsock.h"
@@ -65,7 +71,15 @@
 #else
 #include <netinet/in.h>
 #endif
+
+#ifdef __sun
+#undef model_t
+#endif
+
 #include <cl_slist.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 
 // we need to declare some mouse variables here, because the menu system

source/cl_model.c

@@ -32,6 +32,9 @@
 #ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 #include "model.h"
 #include "crc.h"
 #include "msg.h"

source/cl_parse.c

@@ -40,6 +40,9 @@
 #include "msg.h"
 #include "pmove.h"
 #include "sbar.h"
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 extern     cvar_t  *gl_flashblend;
 extern     cvar_t  *cl_autoexec;

source/cl_tent.c

@@ -39,6 +39,9 @@
 
 #include <math.h>
 #include <stdlib.h>
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 
 #define	MAX_BEAMS	8
 typedef struct

source/cl_trans.c

@@ -34,6 +34,9 @@
 #include "client.h"
 
 #include <string.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 /*
 =====================

source/cmd.c

@@ -41,6 +41,9 @@
 
 #include <string.h>
 #include <ctype.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 void Cmd_ForwardToServer (void);
 

source/com.c

@@ -88,7 +88,7 @@ COM_Init
 */
 void COM_Init (void)
 {
-#ifndef WORDS_BIGENDIEN
+#ifndef WORDS_BIGENDIAN
 		bigendien = false;
 		BigShort = ShortSwap;
 		LittleShort = ShortNoSwap;

source/gl_draw.c

@@ -32,6 +32,9 @@
 
 #include <string.h>
 #include <stdio.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 #include "bothdefs.h"	// needed by: common.h, net.h, client.h
 
@@ -1240,7 +1243,12 @@ void GL_Upload8_EXT (byte *data, int width, int height,  qboolean mipmap, qboole
 	{
 		if (!mipmap)
 		{
+/* FIXME - what if this extension isn't available? */
+#ifdef HAVE_GL_COLOR_INDEX8_EXT
 			glTexImage2D (GL_TEXTURE_2D, 0, GL_COLOR_INDEX8_EXT, scaled_width, scaled_height, 0, GL_COLOR_INDEX , GL_UNSIGNED_BYTE, data);
+#else
+                        /* FIXME - should warn that this isn't available */
+#endif
 			goto done;
 		}
 		memcpy (scaled, data, width*height);
@@ -1248,7 +1256,12 @@ void GL_Upload8_EXT (byte *data, int width, int height,  qboolean mipmap, qboole
 	else
 		GL_Resample8BitTexture (data, width, height, scaled, scaled_width, scaled_height);
 
+// FIXME - what if this extension isn't available?
+#ifdef HAVE_GL_COLOR_INDEX8_EXT
 	glTexImage2D (GL_TEXTURE_2D, 0, GL_COLOR_INDEX8_EXT, scaled_width, scaled_height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, scaled);
+#else
+        /* FIXME - should warn that this isn't available */
+#endif
 	if (mipmap)
 	{
 		int		miplevel;
@@ -1264,7 +1277,12 @@ void GL_Upload8_EXT (byte *data, int width, int height,  qboolean mipmap, qboole
 			if (scaled_height < 1)
 				scaled_height = 1;
 			miplevel++;
+/* FIXME - what if this extension isn't available? */
+#ifdef HAVE_GL_COLOR_INDEX8_EXT
 			glTexImage2D (GL_TEXTURE_2D, miplevel, GL_COLOR_INDEX8_EXT, scaled_width, scaled_height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, scaled);
+#else
+                        /* FIXME - should warn that this isn't available */
+#endif
 		}
 	}
 done: ;
@@ -1401,7 +1419,7 @@ void GL_SelectTexture (GLenum target)
 {
 	if (!gl_mtexable)
 		return;
-#ifndef __linux__ // no multitexture under Linux yet
+#ifdef _WIN32 // FIXME - only multi-texture under Win32
 	qglSelectTextureSGIS(target);
 #endif
 	if (target == oldtarget) 

source/gl_rmisc.c

@@ -31,6 +31,9 @@
 #endif
 #include <string.h>
 #include <stdio.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 #include "bothdefs.h"   // needed by: common.h, net.h, client.h
 

source/gl_warp.c

@@ -34,6 +34,9 @@
 #include <math.h>
 #include <stdio.h>
 #include <stdlib.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 #include "bothdefs.h"
 #include "console.h"

source/info.c

@@ -34,6 +34,9 @@
 #include <string.h>
 #include <stdio.h>
 #include <ctype.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 /*
 =====================================================================

source/keys.c

@@ -35,6 +35,9 @@
 
 #include <stdlib.h>
 #include <string.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 #include "qtypes.h"
 #include "sys.h"

source/mathlib.c

@@ -29,6 +29,9 @@
 #ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 #include <math.h>
 #include "qtypes.h"
 #include "mathlib.h"

source/net_chan.c

@@ -34,6 +34,9 @@
 #else
 # include <windows.h>
 #endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 
 #include <time.h>
 #include <stdarg.h>

source/net_udp.c

@@ -82,6 +82,14 @@
 # define MAXHOSTNAMELEN	512
 #endif
 
+#ifndef HAVE_SOCKLEN_T
+# ifdef HAVE_SIZE
+typedef size_t socklen_t;
+# else
+typedef unsigned int socklen_t;
+# endif
+#endif
+
 netadr_t	net_local_adr;
 
 netadr_t	net_from;
@@ -230,13 +238,13 @@ qboolean NET_IsClientLegal(netadr_t *adr)
 
 qboolean NET_GetPacket (void)
 {
-	int 	ret;
+	int 	            ret;
-	struct sockaddr_in	from;
+	struct sockaddr_in  from;
-	int		fromlen;
+	socklen_t           fromlen;
 
 	fromlen = sizeof(from);
-	ret = recvfrom(net_socket, net_message_buffer, sizeof(net_message_buffer),
+	ret = recvfrom(net_socket, (void*)net_message_buffer, sizeof(net_message_buffer), 0, (struct sockaddr *)&from, &fromlen);
-				   0, (struct sockaddr *)&from, &fromlen);
+	SockadrToNetadr (&from, &net_from);
 	SockadrToNetadr(&from, &net_from);
 
 	if (ret == -1) {
@@ -337,7 +345,7 @@ void NET_GetLocalAddress (void)
 {
 	char	buff[MAXHOSTNAMELEN];
 	struct sockaddr_in	address;
-	int		namelen;
+	socklen_t               namelen;
 
 	gethostname(buff, MAXHOSTNAMELEN);
 	buff[MAXHOSTNAMELEN-1] = 0;

source/pmovetst.c

@@ -29,6 +29,9 @@
 #ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 #include "sys.h"
 #include "qtypes.h"
 #include "pmove.h"

source/pr_edict.c

@@ -44,6 +44,9 @@
 #include <stdlib.h>
 #include <math.h>
 #include <string.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 void SV_Error (char *error, ...);
 

source/r_main.c

@@ -29,6 +29,9 @@
 #ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 #include "sys.h"
 #include "cmd.h"
 #include "bothdefs.h"

source/snd_mix.c

@@ -29,6 +29,9 @@
 #ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 #include "sound.h"
 #include "console.h"
 

source/sv_ccmds.c

@@ -45,6 +45,9 @@
 
 #include <stdlib.h>
 #include <string.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 qboolean	sv_allow_cheats;
 

source/sv_ents.c

@@ -29,6 +29,9 @@
 #ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 #include "server.h"
 #include "crc.h"
 #include "msg.h"

source/sv_main.c

@@ -45,6 +45,9 @@
 #include <stdarg.h>
 #include <stdlib.h>
 #include <string.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 
 quakeparms_t host_parms;
 

source/sv_nchan.c

@@ -29,6 +29,9 @@
 #ifdef HAVE_CONFIG_H
 # include <config.h>
 #endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 #include "server.h"
 #include "crc.h"
 #include "msg.h"

source/sv_sys_unix.c

@@ -31,6 +31,9 @@
 # include <config.h>
 #endif
 #include <sys/types.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
 #include "qargs.h"
 #include "cvar.h"
 #include "server.h"
@@ -46,6 +49,9 @@
 #include <errno.h>
 #include <unistd.h>
 #include <sys/time.h>
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 
 
 /* cvar_t	sys_extrasleep = {"sys_extrasleep","0"};

source/world.c

@@ -36,6 +36,9 @@
 #include "console.h"
 
 #include <stdio.h>
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 
 /*