[Bug dynamic-link/33129] New: Need a tag to indicate that glibc has working GNU2 TLS support

hjl.tools at gmail dot com sourceware-bugzilla@sourceware.org
Thu Jul 3 23:19:59 GMT 2025


https://sourceware.org/bugzilla/show_bug.cgi?id=33129

            Bug ID: 33129
           Summary: Need a tag to indicate that glibc has working GNU2 TLS
                    support
           Product: glibc
           Version: 2.42
            Status: NEW
          Severity: normal
          Priority: P2
         Component: dynamic-link
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
                CC: dilfridge at gentoo dot org, fweimer at redhat dot com
        Depends on: 31372
  Target Milestone: ---
            Target: x86-64

We'd like to turn on -mtls-dialect=gnu2 by default on x86-64 for GCC 16:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120933

We need to a way to make sure that glibc has the fix for GNU2 TLS run-time
bug:

https://sourceware.org/bugzilla/show_bug.cgi?id=31372


Referenced Bugs:

https://sourceware.org/bugzilla/show_bug.cgi?id=31372
[Bug 31372] _dl_tlsdesc_dynamic doesn't preserve all caller-saved registers
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