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Re: are ".da" files platform-independent?

From: Nathan Sidwell <nathan at codesourcery dot com>
To: Johnny Huynh <huynh at ugrad dot cs dot ualberta dot ca>
Cc: gcc at gcc dot gnu dot org
Date: Wed, 26 May 2004 09:30:55 +0100
Subject: Re: are ".da" files platform-independent?
Organization: Codesourcery LLC
References: <Pine.LNX.4.56.0405251329330.4230@csu510.cs.ualberta.ca>

Johnny Huynh wrote:

Hi,

I am trying to produce profile-directed optimizations for a c4x DSP.
I currently do not have the hardware, but I have a working i386/c4x
cross-compiler.

I compiled and ran my application on i386/linux to get the ".da" file and
can recompile on i386/linux using the ".da" file. However, if I try to
recompile my application with my cross-compiler, it fails.

So I guess the ".da" is not platform-independent? Can I make this work
somehow?

The .da files are specific to a particular target. You can't take a
.da file produced on i86 and feed it into a compiler targetting c4x
for instance.  You should be able to take a .da produced by c4x and feed it
into a cross compiler targetting c4x.

In gcc 3.4 this is certainly true - but that has a different format.

nathan

--
Nathan Sidwell    ::   http://www.codesourcery.com   ::     CodeSourcery LLC
nathan@codesourcery.com    ::     http://www.planetfall.pwp.blueyonder.co.uk

References:
- are ".da" files platform-independent?
  - From: Johnny Huynh

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