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Re: May 2015 Toolchain Update

From: Nicholas Clifton <nickc at redhat dot com>
To: Alexander Monakov <amonakov at ispras dot ru>
Cc: gcc at gcc dot gnu dot org
Date: Mon, 18 May 2015 14:11:14 +0100
Subject: Re: May 2015 Toolchain Update
Authentication-results: sourceware.org; auth=none
References: <87r3qeutgu dot fsf at redhat dot com> <alpine dot LNX dot 2 dot 11 dot 1505181232120 dot 22867 at monopod dot intra dot ispras dot ru>

Hi Alexander,

     * GCC supports a new option: -fno-plt

       Not all architectures support this option, and some other
       optimization features, such as lazy binding, may disable it.


The last paragraph looks confusing to be on both points.  '-fno-plt' is
implemented as a transformation during TreeSSA-to-RTL expansion, so it works
in a machine-independent manner; it's a no-op only if the target has no way to
turn on '-fPIC'.  Is that what you meant?


Yes.  Sorry about the confusion.

Second, lazy binding is not an optimization feature of GCC (it's implemented
as part of (e.g. glibc's) dynamic linker), so it's not quite right to say that
-fno-plt would be disabled by it.


OK - thank you for the correction.

Cheers
  Nick

References:
- May 2015 Toolchain Update
  - From: Nick Clifton
- Re: May 2015 Toolchain Update
  - From: Alexander Monakov

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