[Bug libc/31080] New: strerrorname_np and strerror don't know about ENOSYM and EREMOTERELEASE on Linux/hppa

["bruno at clisp dot org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=31080

            Bug ID: 31080
           Summary: strerrorname_np and strerror don't know about ENOSYM
                    and EREMOTERELEASE on Linux/hppa
           Product: glibc
           Version: 2.37
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: bruno at clisp dot org
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

Created attachment 15225
  --> https://sourceware.org/bugzilla/attachment.cgi?id=15225&action=edit
test case foo.c

The function strerrorname_np is supposed to return non-NULL for all defined
errno values.
https://www.gnu.org/software/libc/manual/html_node/Error-Messages.html

On Linux/hppa, for the errnos with names
  ENOSYM
  EREMOTERELEASE
it returns NULL.

$ grep -rw ENOSYM /usr/include
/usr/include/asm/errno.h:#define ENOSYM         215     /* symbol does not
exist in executable */
$ grep -rw EREMOTERELEASE /usr/include 
/usr/include/asm/errno.h:#define        EREMOTERELEASE  240     /* Remote peer
released connection */

How to reproduce:
$ gcc -Wall foo.c
$ ./a.out

Expected output:
strerrorname_np (ENOSYM) = "ENOSYM"
strerrorname_np (EREMOTERELEASE) = "EREMOTERELEASE"
strerror (ENOSYM) = Symbol does not exist in executable
strerror (EREMOTERELEASE) = Remote peer released connection

Actual output:
strerrorname_np (ENOSYM) = (null)
strerrorname_np (EREMOTERELEASE) = (null)
strerror (ENOSYM) = Unknown error 215
strerror (EREMOTERELEASE) = Unknown error 240


Seen on T2-SDE Linux, with glibc 2.37.

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