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Re: Compiling gcc in 64 bits mode

From: Brian Budge <brian dot budge at gmail dot com>
To: kevin diggs <diggskevin38 at gmail dot com>
Cc: Ian Lance Taylor <iant at google dot com>, lol37 lol37 <lol37cs16 at gmail dot com>, gcc-help at gcc dot gnu dot org
Date: Fri, 29 Jul 2011 12:58:28 -0700
Subject: Re: Compiling gcc in 64 bits mode
References: <CAG0GeRCoBQ_G0y_XWSo2UgvHHkvk0wLiG8puffo=AT_xpGKMCQ@mail.gmail.com> <mcrwrf09ali.fsf@coign.corp.google.com> <CAKTLLVSkfGPwfDFkfuFguGJrC368EnJiuXbLTZpuu4HpmQUnpQ@mail.gmail.com>

On Fri, Jul 29, 2011 at 12:40 PM, kevin diggs <diggskevin38@gmail.com> wrote:
> On Fri, Jul 29, 2011 at 1:59 PM, Ian Lance Taylor <iant@google.com> wrote:
>>
>> Normally if you build gcc on a 64-bit host it will automatically be
>> configured to generate 64-bit code.
>>
> I don't have any x86-64 (int64) systems. Is it better to use 64-bit on
> x86-64 even with the larger memory footprint (because the programming
> model is better (more registers, etc))? Is there a 32-bit pointer
> (address space 64-bit programming model?
>
> Thanks!
>
> kevin
>

This depends on your program and your data requirements.  If you need
more than 4 GB address space, of course, you need to use 64-bit.  If
not, you'd have to try your individual program to see if you are
better off with 32-bit or 64-bit.

  Brian

References:
- Compiling gcc in 64 bits mode
  - From: lol37 lol37
- Re: Compiling gcc in 64 bits mode
  - From: Ian Lance Taylor
- Re: Compiling gcc in 64 bits mode
  - From: kevin diggs

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