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[Bug ld/17085] Hello world gets bigger with plugin.


From: amodra at gmail dot com
Subject: [Bug ld/17085] Hello world gets bigger with plugin.
Date: Tue, 05 Aug 2014 07:06:19 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=17085

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |amodra at gmail dot com

--- Comment #1 from Alan Modra <amodra at gmail dot com> ---
Right, you get more dynamic symbols.  These:
NOTYPE  WEAK   DEFAULT  UND _ITM_deregisterTMCloneTable
NOTYPE  WEAK   DEFAULT  UND _Jv_RegisterClasses
NOTYPE  WEAK   DEFAULT  UND _ITM_registerTMCloneTable

And the reason you get them is that libgcc_s.so is being linked via gcc's
--pass-through option *outside of --as-needed*.  That also adds a DT_NEEDED tag
for libgcc_s.so.1, which also increases the size of the binary.

I could say this is a gcc bug for continuing to use --pass-through, when ld
hasn't needed that option for quite a while. :)

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