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Re: [build] Move unwinder to toplevel libgcc

From: Paolo Bonzini <bonzini at gnu dot org>
To: "Joseph S. Myers" <joseph at codesourcery dot com>
Cc: Rainer Orth <ro at CeBiTec dot Uni-Bielefeld dot DE>, gcc-patches at gcc dot gnu dot org, Ralf Wildenhues <Ralf dot Wildenhues at gmx dot de>, Ian Lance Taylor <iant at google dot com>, Steve Ellcey <sje at cup dot hp dot com>, Richard Earnshaw <richard dot earnshaw at arm dot com>, Ramana Radhakrishnan <ramana dot radhakrishnan at arm dot com>, Nick Clifton <nickc at redhat dot com>, Douglas Rupp <rupp at gnat dot com>, Tristan Gingold <gingold at adacore dot com>, Mike Stump <mikestump at comcast dot net>, Kaz Kojima <kkojima at gcc dot gnu dot org>, David Edelsohn <dje dot gcc at gmail dot com>, Sterling Augustine <augustine dot sterling at gmail dot com>, Arnaud Charlet <charlet at adacore dot com>, java-patches at gcc dot gnu dot org, Nicola Pero <nicola dot pero at meta-innovation dot com>, libstdc++ at gcc dot gnu dot org, Richard Sandiford <rdsandiford at googlemail dot com>
Date: Wed, 29 Jun 2011 13:28:37 +0200
Subject: Re: [build] Move unwinder to toplevel libgcc
References: <yddfwn4pu5u.fsf@manam.CeBiTec.Uni-Bielefeld.DE> <4E0AEEF0.7080406@gnu.org> <Pine.LNX.4.64.1106291037290.22294@digraph.polyomino.org.uk>

On 06/29/2011 12:41 PM, Joseph S. Myers wrote:

On Wed, 29 Jun 2011, Paolo Bonzini wrote:

On 06/20/2011 02:24 PM, Rainer Orth wrote:

* The only unwinder-related macro I haven't moved is
    LIBGCC2_UNWIND_ATTRIBUTE.  It is only defined gcc/config/mips/mips.h.
    I suppose we would need a libgcc equivalent of tm.h for that,
    something I didn't want to attack at this point.

Something like the attached?


This patch appears to create a *second* file called libgcc_tm.h, so there
is one created in gcc/ and one in libgcc/, which seems incredibly
confusing.  By all means move the libgcc_tm.h logic to libgcc/ (though
tm.h will need to continue to include libgcc_tm.h for the target, until
the transition away from tm.h target macros in target code is complete and
code includes libgcc_tm.h directly instead), but don't have two headers
with the same name in different build directories.

Yes, the patch was not complete and only meant to be the plumbing for what you describe.

I think Rainer missed the existence of libgcc_tm_file. :)

Paolo

Follow-Ups:
- Re: [build] Move unwinder to toplevel libgcc
  - From: Rainer Orth

References:
- Re: [build] Move unwinder to toplevel libgcc
  - From: Paolo Bonzini
- Re: [build] Move unwinder to toplevel libgcc
  - From: Joseph S. Myers

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