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[Bug ld/22751] LTO broken for libgcc libcalls

From: amodra at gmail dot com
Subject: [Bug ld/22751] LTO broken for libgcc libcalls
Date: Sat, 27 Jan 2018 13:01:41 +0000


--- Comment #4 from Alan Modra <amodra at gmail dot com> ---
Sigh, so it seems reverting the patch does fix the problem.  I don't know what
happened when I attempted the revert earlier today..

Now that I've had a bit more time to look at the problem, it seems the patch is
causing _divdi3.o extracted from libgcc.a to not be on the file_chain list. 
This is the list used by LANG_FOR_EACH_INPUT_STATEMENT in
output_section_callback, so the .text section from that file is not seen by
map_input_to_output_sections and thus has no output section.  Symbols defined
in a section without output section are unresolvable

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