VxWorks doesn't support __cxa_thread_atexit, so XFAIL the test that
relies on it for correct destruction order of thread-local objects.
for gcc/testsuite/ChangeLog
* g++.dg/tls/thread_local-order2.C: XFAIL on VxWorks.
// { dg-require-effective-target c++11 }
// { dg-add-options tls }
// { dg-require-effective-target tls_runtime }
-// { dg-xfail-run-if "" { { hppa*-*-hpux* *-*-solaris* } || { newlib } } }
+// { dg-xfail-run-if "" { { hppa*-*-hpux* *-*-solaris* *-*-vxworks* } || { newlib } } }
extern "C" void abort();
extern "C" int printf (const char *, ...);