Re: [coLinux-devel] good news....

[Henry N. <hen...@ar...>]

  Ubuntu 9.04 (Debian 5.0) has gcc 4.3.3 with 64 bit support.
You needs to install package libc6-dev-amd64, than "gcc -m64 ..." works.

An image Ubuntu 9.04 for coLinux exist on SF:
http://sourceforge.net/projects/colinux/files/Images%202.6.x%20Ubuntu/Ubuntu%209.04/

A link to image Ubuntu 9.10 exist in Wiki:
http://colinux.wikia.com/wiki/UbuntuKarmic

-- 
Henry

On 26.06.2010 11:06, Paolo Minazzi wrote:
> It is not so simple to generate 64bit code on a 32bit system.
> I have tried both gcc 3.4.3 and a gcc 4.1.2 version.
> Probably these compiler are not build enabling 64bit.
> I have always this message:
>
> gcc p.c -m64
> ======>  p.c:1: sorry, unimplemented: 64-bit mode not compiled in
> p.c: In function `main':
> p.c:4: warning: return type of 'main' is not `int'
>
> I have found several reference in google about this message, but not a
> simple solution.
>
> A possibiliy is to use the Henry script build_cross.sh and substitute
> --target=xxxx.
> xxx should be x86_64 or something else.
>
> Probably (I'm not sure) we need to build a cross compiler.
>
> Paolo
>
> On Fri, Jun 25, 2010 at 10:44 PM, Henry Nestler<hen...@ar...>  wrote:
>>   Currently the gcc is forced to build a 32 bit Linux kernel with the option
>> "ARCH=i386" in the call "make ... vmlinux". We need this to build coLinux
>> for 32 bit on 64 bit platforms.
>>
>> Maybe a "ARCH=x86_64" can force the other way for you?
>>
>> The option '-m64' exist also in source of gcc 3.4.5, see that changelog:
>> 2004-02-18  Jakub Jelinek<ja...@re...>
>>
>>         * config/i386/i386.c (override_options): Don't imply 3DNow! for -m64
>>         by default.
>>
>> ... and more ...
>>
>> The default GCC inside a 32 bit system has mostly not enabled the 64 bit
>> option?
>>
>> --
>> Henry
>>
>> On 25.06.2010 10:22, Paolo Minazzi wrote:
>>> I try to answer myself.
>>> gcc 4.0 can produce also 64bit code (I have read -m64 option or
>>> arch=x86_64)
>>> It seems gcc 3.x cannot do it.
>>>
>>> On my linux native I have a gcc 3.x, so colinux kernel_64bit  is not
>>> compiled in 64bit mode.
>>>
>>> I will check it.
>>> Paolo
>>>
>>>
>>>
>>>
>>> On Fri, Jun 25, 2010 at 8:53 AM, Paolo Minazzi<pao...@gm...>
>>>   wrote:
>>>> Hi Henry,
>>>> I have tried to use your devel-64bit packages on my 32bit linux system.
>>>> All compiling process is OK.
>>>> To understand 64bit internal (IDT and memory management) I'd like to
>>>> test a linux native 64bit on a qemu-64bit.
>>>> But I need gcc 64bit.
>>>>
>>>> My gcc produce 32bit code. Is there some option ?
>>>> I have see that your 64bit package compile linux kernel. But it uses
>>>> gcc. And my gcc is 32bit.
>>>>
>>>> Thanks,
>>>> Paolo