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

[amodra at gmail dot com]

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

--- Comment #12 from Alan Modra <amodra at gmail dot com> ---
The crx and xgate FAILs are due to broken relocation processing.  I don't think
they should be swept under the rug.  HJ has already pointed out why mips is
failing in https://sourceware.org/ml/binutils/2017-05/msg00195.html.  I've
looked into the arm failure, which is due to .ARM.attributes being marked KEEP
and then  _bfd_elf_gc_mark_extra_sections setting some_kept.  A possible fix is
to only set some_kept when an *alloc* section is kept.  Testing that now.

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