This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: PR/15448: add a compiler timestamp to PCH files

From: Theodore Papadopoulo <Theodore dot Papadopoulo at sophia dot inria dot fr>
To: Ian Lance Taylor <ian at airs dot com>
Cc: Paolo Bonzini <paolo dot bonzini at lu dot unisi dot ch>, Mike Stump <mrs at apple dot com>, gcc-patches at gcc dot gnu dot org, Paul Brook <paul at codesourcery dot com>
Date: Thu, 17 Feb 2005 13:43:34 +0100
Subject: Re: PR/15448: add a compiler timestamp to PCH files
Organization: INRIA Sophia-Antipolis
References: <4210C725.6050503@lu.unisi.ch> <Pine.LNX.4.44.0502141913480.25477-100000@www.eyesopen.com> <42121F1E.5010101@lu.unisi.ch> <4212425E.8030005@lu.unisi.ch> <715B0F3B-2B41-4459-8961-CF60FC4E5BC9@apple.com> <421333A6.8000708@lu.unisi.ch> <m3ekfgng5h.fsf@gossamer.airs.com>
Reply-to: Theodore dot Papadopoulo at sophia dot inria dot fr

On Wed, 2005-02-16 at 20:12 -0500, Ian Lance Taylor wrote:
> Paolo Bonzini <paolo.bonzini@lu.unisi.ch> writes:

> I think it would be simpler and more efficient to pick a set of
> relevant compiler global variables and functions and hash their
> addresses together.  If those are well chosen, it will be very
> unlikely to generate a PCH with same hash code that will not work.

But wouldn't this fail with Position Independent Executable ? At least,
differences of adresses must be used, and I do not even know whether
this would be sufficient...

Then, of course, PCH is not currently working with PIE....

Follow-Ups:
- Re: PR/15448: add a compiler timestamp to PCH files
  - From: Paolo Bonzini
- Re: PR/15448: add a compiler timestamp to PCH files
  - From: Ian Lance Taylor

References:
- Re: [PATCH] Split simplify_unary_operation and simplify_binary_operation
  - From: Paolo Bonzini
- Re: [PATCH] Split simplify_unary_operation and simplify_binary_operation
  - From: Roger Sayle
- Re: [PATCH] Split simplify_unary_operation and simplify_binary_operation
  - From: Paolo Bonzini
- Re: [PATCH] Split simplify_unary_operation and simplify_binary_operation
  - From: Paolo Bonzini
- Re: [PATCH] Split simplify_unary_operation and simplify_binary_operation
  - From: Mike Stump
- PR/15448: add a compiler timestamp to PCH files
  - From: Paolo Bonzini
- Re: PR/15448: add a compiler timestamp to PCH files
  - From: Ian Lance Taylor

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]