Index: configure/os/CONFIG.Common.vxWorks-ppc604_altivec
===================================================================
diff -u -b -r1.1.2.2 -r1.1.2.3
--- configure/os/CONFIG.Common.vxWorks-ppc604_altivec   20 Dec 2006 23:28:12 -0000  1.1.2.2
+++ configure/os/CONFIG.Common.vxWorks-ppc604_altivec   16 Apr 2007 19:41:07 -0000  1.1.2.3
@@ -13,10 +13,10 @@

 # Tell compiler to include altivec support; not available in 5.4
 ALTIVEC_CFLAG_5.4 = THIS_VERSION_OF_VXWORKS DOES_NOT_SUPPORT_ALTIVEC
-ALTIVEC_CFLAG_5.5 = -fvec
-ALTIVEC_CFLAG_6.0 = -fvec
+ALTIVEC_CFLAG_5.5 = -fvec -DALTIVEC
+ALTIVEC_CFLAG_6.0 = -fvec -DALTIVEC

 # From 6.1 onwards the compiler option changed
-ALTIVEC_CFLAG = -maltivec
+ALTIVEC_CFLAG = -maltivec -DALTIVEC

 ARCH_DEP_CFLAGS += $(call defval,$(ALTIVEC_CFLAG_$(VXWORKS_VERSION)),$(ALTIVEC_CFLAG))
Index: src/libCom/osi/os/vxWorks/osdThread.c
===================================================================
diff -u -b -r1.35.2.12 -r1.35.2.13
--- src/libCom/osi/os/vxWorks/osdThread.c   9 Feb 2007 21:08:44 -0000   1.35.2.12
+++ src/libCom/osi/os/vxWorks/osdThread.c   16 Apr 2007 19:44:22 -0000  1.35.2.13
@@ -136,6 +136,11 @@
     taskVarDelete(tid,(int *)&papTSD);
 }

+#ifdef ALTIVEC
+  #define TASK_FLAGS (VX_FP_TASK | VX_ALTIVEC_TASK)
+#else
+  #define TASK_FLAGS (VX_FP_TASK)
+#endif
 epicsThreadId epicsThreadCreate(const char *name,
     unsigned int priority, unsigned int stackSize,
     EPICSTHREADFUNC funptr,void *parm)
@@ -147,7 +152,7 @@
         return(0);
     }
     tid = taskSpawn((char *)name,getOssPriorityValue(priority),
-        VX_FP_TASK, stackSize,
+        TASK_FLAGS, stackSize,
         (FUNCPTR)createFunction,(int)funptr,(int)parm,
         0,0,0,0,0,0,0,0);
     if(tid==ERROR) {