[Bug nptl/29834] New: libpthread.so lacks GLIBC_PRIVATE version for glibc 2.34 and later

["misch at google dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29834

            Bug ID: 29834
           Summary: libpthread.so lacks GLIBC_PRIVATE version for glibc
                    2.34 and later
           Product: glibc
           Version: 2.34
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: nptl
          Assignee: unassigned at sourceware dot org
          Reporter: misch at google dot com
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

Created attachment 14474
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14474&action=edit
Patch to restore GLIBC_PRIVATE version for libpthread.so

Since glibc 2.34 libpthread.so no longer provides the GLIBC_PRIVATE version.
This in turn causes problems with closed source software which we can't
recompile ourselves. I've filed this bug to discuss if it would make sense to
restore the GLIBC_PRIVATE version.


Details:
Commit e8d52b64a54ba9ed7778ca9ce1f084eb5808f8d1 [1] removed the GLIBC_PRIVATE
version from libthread.so. This in turn caused closed source software by
Synopsys [2] to fail with this error:

$ /opt/synopsys/vcs/T-2022.06-SP1-1/linux64/bin/vcs1 -h
/opt/synopsys/vcs/T-2022.06-SP1-1/linux64/bin/vcs1:
/lib/x86_64-linux-gnu/libpthread.so.0: version `GLIBC_PRIVATE' not found
(required by /opt/synopsys/vcs/T-2022.06-SP1-1/linux64/bin/vcs1)


It turns out that the Synopsys binaries have a weak symbol for
__pthread_unwind@GLIBC_PRIVATE. Synopsys support is slow and so for the time
being we've helped ourselves by patching glibc to provide the GLIBC_PRIVATE
version again for libpthread.so (see attached patch).


[1]
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=e8d52b64a54ba9ed7778ca9ce1f084eb5808f8d1
[2] https://www.synopsys.com/

-- 
You are receiving this mail because:
You are on the CC list for the bug.