[Bug ld/32387] ppc64 TLS local-dynamic optimization bug when built with -fno-plt

[amodra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=32387

--- Comment #5 from Alan Modra <amodra at gmail dot com> ---
Yes, as things stand the inline plt code emitted by gcc is incompatible with
the linker telling glibc ld.so (via DT_PPC64_OPT & PPC64_OPT_TLS) to
short-circuit tls_get_addr calls at runtime.

I think I'd fix this in the linker by detecting whether any of the inline plt
relocs against __tls_get_addr exist, and forcing tls_get_addr_opt = 0 if found.

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