C++ compilers on Linux supporting 64bit architecture?

[Karl Larsen]

Bo Berglund wrote:
> I am new to Linux, but I am invsetigating a performance issue in a big
> tomography program developed for Windows.
> We have made a command line version of this and compiled for 64 bit
> architecture on Win X64 to evaluate performance improvements.
> The compilation was done in WinXP (32 bit) using MS VisualStudio 2005
> but targeting X64.
>
> The questions now are:
>
> 1) Is it possible to cross-compile on Linux 32 bit to produce an
> executable for the 64bit architecture Linux as well as 32 bit?
>
> 2) Can we expect an improvement in performance of such a command line
> (no GUI) program in Linux compared to Windows? The program performs
> massive math calculations and has been optimized to use the available
> resources well.
>
> 3) The program is written in C++, would there be big porting issues
> moving it from Windows to Linux, code-wise?
>
> I understand that this is not a Fedora question per se, but since
> Fedora is such a popular distribution I thought that the comparison
> and development questions may fit here anyway. Sorry if you all
> disagree...
>
> Grateful for any comment though.
>
> Bo Berglund
>
>   
    In Linux Bo, if you want to write in 64 bit you load the version of 
Fedora 7 that is totally 64 bit. This is the f7 x86-64 distribution and 
different than Microsoft, you can download this free. Then you can 
compile in C or C++ with 64 bit. No need to cross/compile.



-- 

	Karl F. Larsen, AKA K5DI
	Linux User
	#450462   http://counter.li.org.