From /dev/humancontroller:

when hard-linking renderers, put the old renderer (not the new one) into the "ioquake3" executable, and use a distinguished "ioquake3_rend2" executable for the new renderer
(Fixes bug #5789.)

Makefile

@@ -877,8 +877,14 @@ ifneq ($(BUILD_CLIENT),0)
     endif
   else
     TARGETS += $(B)/$(CLIENTBIN)$(FULLBINEXT)
+    ifneq ($(BUILD_RENDERER_REND2), 0)
+      TARGETS += $(B)/$(CLIENTBIN)_rend2$(FULLBINEXT)
+    endif
     ifneq ($(BUILD_CLIENT_SMP),0)
       TARGETS += $(B)/$(CLIENTBIN)-smp$(FULLBINEXT)
+      ifneq ($(BUILD_RENDERER_REND2), 0)
+        TARGETS += $(B)/$(CLIENTBIN)_rend2-smp$(FULLBINEXT)
+      endif
     endif
   endif
 endif
@@ -1814,13 +1820,25 @@ $(B)/renderer_rend2_smp_$(SHLIBNAME): $(Q3R2OBJ) $(Q3RPOBJ_SMP) $(JPGOBJ)
 		$(THREAD_LIBS) $(LIBSDLMAIN) $(RENDERER_LIBS) $(LIBS)
 
 else
-$(B)/$(CLIENTBIN)$(FULLBINEXT): $(Q3OBJ) $(Q3R2OBJ) $(Q3RPOBJ_UP) $(JPGOBJ) $(LIBSDLMAIN)
+$(B)/$(CLIENTBIN)$(FULLBINEXT): $(Q3OBJ) $(Q3ROBJ) $(Q3RPOBJ_UP) $(JPGOBJ) $(LIBSDLMAIN)
+	$(echo_cmd) "LD $@"
+	$(Q)$(CC) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) \
+		-o $@ $(Q3OBJ) $(Q3ROBJ) $(Q3RPOBJ_UP) $(JPGOBJ) \
+		$(LIBSDLMAIN) $(CLIENT_LIBS) $(RENDERER_LIBS) $(LIBS)
+
+$(B)/$(CLIENTBIN)-smp$(FULLBINEXT): $(Q3OBJ) $(Q3ROBJ) $(Q3RPOBJ_SMP) $(JPGOBJ) $(LIBSDLMAIN)
+	$(echo_cmd) "LD $@"
+	$(Q)$(CC) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) $(THREAD_LDFLAGS) \
+		-o $@ $(Q3OBJ) $(Q3ROBJ) $(Q3RPOBJ_SMP) $(JPGOBJ) \
+		$(THREAD_LIBS) $(LIBSDLMAIN) $(CLIENT_LIBS) $(RENDERER_LIBS) $(LIBS)
+
+$(B)/$(CLIENTBIN)_rend2$(FULLBINEXT): $(Q3OBJ) $(Q3R2OBJ) $(Q3RPOBJ_UP) $(JPGOBJ) $(LIBSDLMAIN)
 	$(echo_cmd) "LD $@"
 	$(Q)$(CC) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) \
 		-o $@ $(Q3OBJ) $(Q3R2OBJ) $(Q3RPOBJ_UP) $(JPGOBJ) \
 		$(LIBSDLMAIN) $(CLIENT_LIBS) $(RENDERER_LIBS) $(LIBS)
 
-$(B)/$(CLIENTBIN)-smp$(FULLBINEXT): $(Q3OBJ) $(Q3R2OBJ) $(Q3RPOBJ_SMP) $(JPGOBJ) $(LIBSDLMAIN)
+$(B)/$(CLIENTBIN)_rend2-smp$(FULLBINEXT): $(Q3OBJ) $(Q3R2OBJ) $(Q3RPOBJ_SMP) $(JPGOBJ) $(LIBSDLMAIN)
 	$(echo_cmd) "LD $@"
 	$(Q)$(CC) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) $(THREAD_LDFLAGS) \
 		-o $@ $(Q3OBJ) $(Q3R2OBJ) $(Q3RPOBJ_SMP) $(JPGOBJ) \