[Bug testsuite/69406] New: FAIL: 17_intro/headers/c++2011/linkage.cc (test for excess errors)

["thopre01 at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69406

            Bug ID: 69406
           Summary: FAIL: 17_intro/headers/c++2011/linkage.cc (test for
                    excess errors)
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
          Assignee: unassigned at gcc dot gnu.org
          Reporter: thopre01 at gcc dot gnu.org
                CC: redi at gcc dot gnu.org
  Target Milestone: ---
            Target: arm-none-eabi

17_intro/headers/c++2011/linkage.cc fails on arm-none-eabi targets with the
error:

17_intro/headers/c++2011/linkage.cc:47:19: fatal error: uchar.h: No such file
or directory
(...)
FAIL: 17_intro/headers/c++2011/linkage.cc (test for excess errors)

This is because arm-none-eabi uses newlib which does not provide uchar.h. I am
not sure about the correct course of action. Should a xfail be added for newlib
targets? Since uchar.h seems to come from C11, maybe it would be more
appropriate to xfail all tests involving C11 for newlib target?

Best regards.