Re: [gentoo-science] Problems emerging blas-atlas

[Alan Jackson]

On Sun, 5 Feb 2006 13:57:46 -0800 (PST)
Jason Nielsen <jdn@××××××.ca> wrote:

> On Sun, 5 Feb 2006, Alan Jackson wrote:
>
> > I'm having problems emerging blas-atlas-3.6.0-r1 on my AMD64 X2 system.
> > The configure drops into an infinite loop :
> >
> > 	I am now going to ask for two C compilers, and their associated flags.
> > 	The first such set (CC & CCFLAGS) are used in compiling the non-generated
> > 	ATLAS code.  This code is written in normal C, and responds well to high
> > 	levels of optimization.  Typically, this is set to your default compiler,
> > 	and your highest levels of optimization.
> >
> > 	The second set of C compilers (MCC & MMFLAGS) is used to compile the generated
> > 	ATLAS code.  Generated codes are written at a very low-level (think of C used
> > 	as a kind of portable assembler).  On many platforms, high levels of
> > 	optimization are detrimental, as the compiler tries to pipeline a perfectly
> > 	pipelined code, and succeeds in reducing performance substantially (this
> > 	occurs on DEC ALPHAs & Sun UltraSparcs, for instance).  If the default does
> > 	not work for you, try a midrange optimization such as -O.  The generated code
> > 	does not alias any output arguments, so aliasing optimizations should be OK.
> >
> > 	   Enter ANSI C compiler(CC) [/usr/bin/gcc]:    Enter C Flags (CCFLAGS) [-fomit-frame-pointer -O -mfpmath=387 -m64]: Compiling with = '/usr/bin/gcc -fomit-frame-pointer -O -mfpmath=387 -m64' doesn't seem to work for me.
> > 	   Enter 1 to try different CC/flags, 0 to continue anyway [1]:
> >
> > I've turned in a bugzilla ticket - but I thought someone here might have
> > a suggestion for my platform. Is there a compiler flag I should set that
> > would make it happy? Mine are pretty simple : CFLAGS="-O2 -march=athlon-xp"
> > This is a brand new system, so all the ebuilds from the kernel up are completely
> > current.
> >
>
> Version 3.6.0 doesn't support AMD64 chips.  You need to install the 3.7.11
> devel version, it is portage but masked.  If you are looking for a high
> performance Lapack/BLAS for AMD64 you can also try the ACML library
> (http://developer.amd.com/acml.aspx).
>

Interesting. According to the package description on the website, 
3.6.0-r1 is stable for amd64...but, whatever. It appears to be working now.

Thanks!

(I'm working towards compiling SciPy and R)

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| Alan K. Jackson            | To see a World in a Grain of Sand      |
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