[Bug gold/23411] Different behavior when linking common symbol statically or to shared object

[amonakov at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=23411

--- Comment #7 from Alexander Monakov <amonakov at gmail dot com> ---
BFD's behavior becomes very problematic with LTO: archive index does not
distinguish between normal and common definitions, and there's no explicit
plugin API to check if a definition in IR is "common", so the linker has to
round-trip via the plugin in a fairly convoluted way to emulate the non-LTO
behavior :(

I think it would be prudent to understand *why* ld.bfd wants to override common
definitions by unpacking archive members with strong definitions. I don't
expect it's for Fortran - is the real reason stated anywhere?

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