[Bug ld/20882] GNU ld discards sections required by relocations in .debug_info with --gc-sections

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20882

--- Comment #25 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to rguenther from comment #24)
> > 
> > Shouldn't --gc-section tests be enabled in libstdc++ and mark them as XFAIL?
> 
> Not sure how reliable we can identify those.  Also we'd get
> XPASS then unless we have a way to check whether ld is affected by
> the bug or not.

Any unknown --gc-section test failure should be investigated.  If it is
a linker bug, it should be fixed in linker and mark the test as XFAIL.
We can use "ld --version" to check if the linker is fixed or not.

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