[PATCH] nptl: Export libthread_db-used symbols under GLIBC_PRIVATE

[Florian Weimer]

* Simon Marchi:

> I'll have to try using the container that Florian pointed to
> (registry.fedoraproject.org/fedora:rawhide).

You may have to fully strip /usr/lib64/libc.so.6 first because we have a
fairly complete .symtab for other tools (not just GDB).  Currently it's
glibc-2.33.9000-29.fc35.x86_64, and it does not have pthread_create, but
Fedora rawhide glibc is currently under very heavy development.

Thanks,
Florian