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[Bug binutils/25355] nm reports a variable as "T" with -flto and -fno-co

From: nickc at redhat dot com
Subject: [Bug binutils/25355] nm reports a variable as "T" with -flto and -fno-common
Date: Wed, 08 Jan 2020 12:48:05 +0000


Nick Clifton <nickc at redhat dot com> changed:

           What    |Removed                     |Added
                 CC|                            |nickc at redhat dot com

--- Comment #1 from Nick Clifton <nickc at redhat dot com> ---
Hi Martin,

  I think that this problem is due to a weakness in the plugin-api.  The
specification of the ld_plugin_symbol_kind enum only has five values:

  enum ld_plugin_symbol_kind

So it does not have a way to distinguish between code symbols and data symbols.
Hence when a defined symbol is seen the BFD library has to make a choice, and
it chooses to assume that it is a code symbol.  Given that section names have
also been discarded by this point, it is impossible for the library to
distinguish between code and data symbols.

So unless we create a new version of the plugin API, I think that this will
have to remain as an unsolved problem.  At least that is my take on the
subject.  Lets see if anyone else has any better ideas.


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