Bring back VxWorks 5 compatibility

modules/libcom/src/osi/compiler/gcc/compilerSpecific.h

@@ -24,7 +24,11 @@
 #   error compiler/gcc/compilerSpecific.h is not for use with the clang compiler
 #endif
 
-#define EPICS_ALWAYS_INLINE __inline__ __attribute__((always_inline))
+#if __GNUC__ > 2
+#  define EPICS_ALWAYS_INLINE __inline__ __attribute__((always_inline))
+#else
+#  define EPICS_ALWAYS_INLINE __inline__
+#endif
 
 /* Expands to a 'const char*' which describes the name of the current function scope */
 #define EPICS_FUNCTION __PRETTY_FUNCTION__
@@ -41,7 +45,9 @@
 /*
  * CXX_PLACEMENT_DELETE - defined if compiler supports placement delete
  */
-#define CXX_PLACEMENT_DELETE
+#if __GNUC__ > 2 || ( __GNUC__ == 2 && __GNUC_MINOR__ >= 96 )
+#   define CXX_PLACEMENT_DELETE
+#endif
 
 #endif /* __cplusplus */
 
@@ -53,7 +59,9 @@
 /*
  * Deprecation marker
  */
-#define EPICS_DEPRECATED __attribute__((deprecated))
+#if  (__GNUC__ > 2)
+#   define EPICS_DEPRECATED __attribute__((deprecated))
+#endif
 
 /*
  * Unused marker

modules/libcom/src/osi/os/vxWorks/osdThread.c

@@ -46,9 +46,14 @@
   static SPARE_NUM joinField;
   #define ALLOT_JOIN(tid) taskSpareNumAllot(tid, &joinField)
 #else
+  #include <private/taskLibP.h>
   #define ALLOT_JOIN(tid)
 #endif
 
+#ifndef _WRS_VXWORKS_MAJOR
+/* vxWorks 5 */
+#define taskCreate taskCreat
+#endif
 
 epicsShareFunc void osdThreadHooksRun(epicsThreadId id);
 

modules/libcom/src/osi/os/vxWorks/osdThread.h

@@ -12,7 +12,7 @@
 
 /* VxWorks 6.9 and later can support joining threads */
 
-#if (_WRS_VXWORKS_MAJOR == 6 && _WRS_VXWORKS_MINOR < 9)
+#if (!defined(_WRS_VXWORKS_MAJOR) || _WRS_VXWORKS_MAJOR == 6 && _WRS_VXWORKS_MINOR < 9)
 #undef EPICS_THREAD_CAN_JOIN
 #endif