Index: code/unix/unix_glw.h
===================================================================
--- code/unix/unix_glw.h	(revision 1013)
+++ code/unix/unix_glw.h	(working copy)
@@ -19,8 +19,8 @@
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 ===========================================================================
 */
-#if !( defined __linux__ || defined __FreeBSD__ || defined __sun || defined MACOS_X )
-#error You should include this file only on Linux/FreeBSD/Solaris platforms
+#if !( defined __linux__ || defined __FreeBSD__ || defined __sun || defined MACOS_X || defined __sgi )
+#error You should include this file only on Linux/FreeBSD/Solaris/IRIX platforms
 #endif
 
 #ifndef __GLW_LINUX_H__
Index: code/unix/sdl_glimp.c
===================================================================
--- code/unix/sdl_glimp.c	(revision 1013)
+++ code/unix/sdl_glimp.c	(working copy)
@@ -783,10 +783,11 @@
   {
     if ( r_ext_multitexture->value )
     {
+#ifndef __sgi
       qglMultiTexCoord2fARB = ( PFNGLMULTITEXCOORD2FARBPROC ) SDL_GL_GetProcAddress( "glMultiTexCoord2fARB" );
       qglActiveTextureARB = ( PFNGLACTIVETEXTUREARBPROC ) SDL_GL_GetProcAddress( "glActiveTextureARB" );
       qglClientActiveTextureARB = ( PFNGLCLIENTACTIVETEXTUREARBPROC ) SDL_GL_GetProcAddress( "glClientActiveTextureARB" );
-
+#endif
       if ( qglActiveTextureARB )
       {
         GLint glint = 0;
Index: code/renderer/tr_types.h
===================================================================
--- code/renderer/tr_types.h	(revision 1013)
+++ code/renderer/tr_types.h	(working copy)
@@ -227,7 +227,11 @@
 
 #define _3DFX_DRIVER_NAME	"libMesaVoodooGL.so"
 // https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=524
+#ifdef __sgi
+#define OPENGL_DRIVER_NAME	"libGL.so"
+#else
 #define OPENGL_DRIVER_NAME	"libGL.so.1"
+#endif
 
 #endif	// !defined _WIN32
 
Index: code/renderer/qgl.h
===================================================================
--- code/renderer/qgl.h	(revision 1013)
+++ code/renderer/qgl.h	(working copy)
@@ -72,7 +72,7 @@
 #include <GL/fxmesa.h>
 #endif
 
-#elif defined( __sun )
+#elif defined( __sun ) || defined( __sgi )
 #include <GL/gl.h>
 #include <GL/glx.h>
 
@@ -191,7 +191,7 @@
 //===========================================================================
 
 // non-dlopening systems will just redefine qgl* to gl*
-#if !defined( _WIN32 ) && !defined(MACOS_X) && !defined( __linux__ ) && !defined( __FreeBSD__ ) && !defined(__sun) // rb010123
+#if !defined( _WIN32 ) && !defined(MACOS_X) && !defined( __linux__ ) && !defined( __FreeBSD__ ) && !defined(__sun) && !defined(__sgi) // rb010123
 
 #include "qgl_linked.h"
 
Index: code/qcommon/q_platform.h
===================================================================
--- code/qcommon/q_platform.h	(revision 1013)
+++ code/qcommon/q_platform.h	(working copy)
@@ -245,6 +245,22 @@
 
 #endif
 
+//================================================================== IRIX ===
+
+#ifdef __sgi
+
+#define OS_STRING "irix"
+#define ID_INLINE __inline
+#define PATH_SEP '/'
+
+#define ARCH_STRING "mips"
+
+#define Q3_BIG_ENDIAN
+
+#define DLL_EXT ".so"
+
+#endif
+
 //================================================================== Q3VM ===
 
 #ifdef Q3_VM
Index: Makefile
===================================================================
--- Makefile	(revision 1013)
+++ Makefile	(working copy)
@@ -606,13 +606,16 @@
 # SETUP AND BUILD -- IRIX
 #############################################################################
 
-ifeq ($(PLATFORM),irix)
+ifeq ($(PLATFORM),irix64)
 
-  ARCH=mips  #default to MIPS
+  ARCH=mips
 
-  CC=cc
-  BASE_CFLAGS=-Dstricmp=strcasecmp -Xcpluscomm -woff 1185 -mips3 \
-    -nostdinc -I. -I$(ROOT)/usr/include -DNO_VM_COMPILED
+  CC=c99
+  MKDIR=mkdir -p
+  
+  BASE_CFLAGS=-Dstricmp=strcasecmp -Xcpluscomm -woff 1185 -mips4 \
+    -nostdinc -I. -I$(ROOT)/usr/include -DNO_VM_COMPILED \
+    $(shell sdl-config --cflags) -DUSE_SDL_VIDEO=1 -DUSE_SDL_SOUND=1
   RELEASE_CFLAGS=$(BASE_CFLAGS) -O3
   DEBUG_CFLAGS=$(BASE_CFLAGS) -g
 
@@ -620,8 +623,8 @@
   SHLIBCFLAGS=
   SHLIBLDFLAGS=-shared
 
-  LDFLAGS=-ldl -lm
-  CLIENT_LDFLAGS=-L/usr/X11/$(LIB) -lGL -lX11 -lXext -lm
+  LDFLAGS=-ldl -lm -lgen
+  CLIENT_LDFLAGS=-L/usr/X11/$(LIB) $(shell sdl-config --libs) -lGL -lX11 -lXext -lm -lgen
 
 else # ifeq IRIX
 
@@ -841,9 +844,14 @@
 tools:
 	echo QVM tools not built when cross-compiling
 else
-tools:
+   ifeq ($(PLATFORM),irix64)
+   tools:
+	@echo QVM tools not built on IRIX
+   else
+   tools:
 	$(MAKE) -C $(TOOLSDIR)/lcc install
 	$(MAKE) -C $(TOOLSDIR)/asm install
+   endif
 endif
 
 DO_Q3LCC=$(Q3LCC) -o $@ $<
@@ -1837,9 +1845,9 @@
 
 clean2:
 	if [ -d $(B) ];then (find $(B) -name '*.d' -exec rm {} \;)fi
-	rm -f $(Q3OBJ) $(Q3POBJ) $(Q3POBJ_SMP) $(Q3DOBJ) \
-		$(MPGOBJ) $(Q3GOBJ) $(Q3CGOBJ) $(MPCGOBJ) $(Q3UIOBJ) $(MPUIOBJ) \
-		$(MPGVMOBJ) $(Q3GVMOBJ) $(Q3CGVMOBJ) $(MPCGVMOBJ) $(Q3UIVMOBJ) $(MPUIVMOBJ)
+	rm -f $(Q3OBJ) $(Q3POBJ) $(Q3POBJ_SMP) $(Q3DOBJ) 
+	rm -f $(MPGOBJ) $(Q3GOBJ) $(Q3CGOBJ) $(MPCGOBJ) $(Q3UIOBJ) $(MPUIOBJ) 
+	rm -f $(MPGVMOBJ) $(Q3GVMOBJ) $(Q3CGVMOBJ) $(MPCGVMOBJ) $(Q3UIVMOBJ) $(MPUIVMOBJ)
 	rm -f $(TARGETS)
 
 clean-debug: