libCom: STATIC_ASSERT use c++11 static_assert when possible

src/libCom/osi/epicsAssert.h

@@ -43,12 +43,15 @@ epicsShareFunc void epicsAssert (const char *pFile, const unsigned line,
 
 
 /* Compile-time checks */
+#if __cplusplus>=201103L
+#define STATIC_ASSERT(expr) static_assert(expr, #expr)
+#else
 #define STATIC_JOIN(x, y) STATIC_JOIN2(x, y)
 #define STATIC_JOIN2(x, y) x ## y
 #define STATIC_ASSERT(expr) \
     typedef int STATIC_JOIN(static_assert_failed_at_line_, __LINE__) \
     [ (expr) ? 1 : -1 ]
-
+#endif
 
 #ifdef __cplusplus
 }