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From: "siddhesh at sourceware dot org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug string/25399] undefined reference to `__warn_memset_zero_len'
 when changing gnuc version
Date: Thu, 05 Nov 2020 04:44:35 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D25399

Siddhesh Poyarekar <siddhesh at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |siddhesh at sourceware dot=
 org
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #4 from Siddhesh Poyarekar <siddhesh at sourceware dot org> ---
This compilation issue has been fixed[1] upstream; clang and other non-gcc
compilers should now be able to build the reproducer correctly without any
linker errors.

There is the outstanding issue where static libraries and objects built with
older compilers against the older glibc may refuse to link correctly with
current glibc.  The __warn_memset_zero_len symbol has been missing for a wh=
ile
now and nobody has complained specifically about that yet, so it appears th=
at
this issue is rare and if not, being worked around in other ways.

If one needs this to be fixed in glibc by providing __warn_memset_zero_len =
and
provide the linker warning, please file a new bug report to discuss it.

[1] https://sourceware.org/pipermail/glibc-cvs/2020q4/070949.html

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