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Date: Wed, 31 Oct 2007 05:35:45 -0700
From: Tim Prince <tprince AT computer DOT org>
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Subject: Re: GCC compiler -m64 option in cygwin
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anik pal wrote:
> I have c source
> code of a product which I build in solaris environment
> with  gcc compiler –m64 option to create 64 bit
> executable in solaris 9 environment. 
>
> Now I’ve to do the same task for win environment,
> because the library available for my client is in
> windows environment and the library is 64 bit. I
> attempt to use cygwin for this job. Now my question
> are as follows
>
>  
>
> 1 . using cygwin gcc compiler can I link my source
> code building with the win environment lib? 
> 2. is gcc 64 bit option available in cygwin? 
>
>   
No, there is no 64-bit native support in cygwin. Even on linux, a 
cross-gcc is needed to create 64-bit build on a 32-bit system, and none 
of the required libraries or utilities are generally available as a 
normal installation option. Of course, you can use cygwin as a build 
environment when running non-cygwin 64-bit compilers.
A preliminary 64-bit mingw compiler has appeared, but it seems to have 
difficulties linking with pre-existing libraries.

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