cannot find -llapack

[pepe]

Hello,

I am trying to install SLYCOT ("Python wrapper for selected Slicot
routines, notably including solvers for Riccati and Lyapunov
equations").
http://github.com/avventi/Slycot. I am using Python(x,y) version
2.6.5.3

I run:
> python setup.py build -compiler=mingw32

installation process is stopped with message:

> c:/mingw/bin/../lib/gcc/mingw32/4.5.0/../../../../mingw32/bin/ld.exe: cannot find -llapack

Any idea how to fix it?
Is LAPACK a part of pythonxy/scipy distribution?

Thanks!

Best regards,
pepe

[Grizzly Nyo]

Hi,

Lapack is a library not part by Python(x, y) - http://www.netlib.org/lapack
.

The error is caused by the linker not finding the above library.
Download, install, add it to the mingw library directory and try
again.

-gabi

On Sep 15, 8:05 am, pepe <balazovic.pe...@gmail.com> wrote:
> Hello,
>
> I am trying to install SLYCOT ("Python wrapper for selected Slicot
> routines, notably including solvers for Riccati and Lyapunov

> equations").http://github.com/avventi/Slycot. I am using Python(x,y) version

[pepe]

Gabi,

Well, I am trying to do it as you suggested...
No success yet I would need some help here.

What I did:
I downloaded lapack.lib and blas.lib as pre-built libs from
http://icl.cs.utk.edu/lapack-for-windows/
and then I copied to c:\Python26\libs\ and to c:\MinGW\mingw32\lib\

It seems that error "cannot find -llapack" I reported is gone. But
others occurred :(

....
build\temp.win32-2.6\Release\slycot\src\UE01MD.o:UE01MD.f:(.text
+0x47d): undefin
ed reference to `ilaenv_'
build\temp.win32-2.6\Release\slycot\src\UE01MD.o:UE01MD.f:(.text
+0x55d): more un
defined references to `ilaenv_' follow
collect2: ld returned 1 exit status
error: Command "C:\MinGW\bin\gfortran.exe -Wall -mno-cygwin -Wall -mno-
cygwin -s
hared build\temp.win32-2.6\Release\build\src.win32-2.6\slycot\src
\_wrappermodule
.o
...

I modified compiler options e.g. adding -ff2c option and so - it does
not help.

I think I still missing some libs or headers...or do you have any
suggestion for me?
Thank you very much!

Best regards,
Peter

On Sep 18, 6:43 pm, Grizzly Nyo <grizzly....@gmail.com> wrote:
> Hi,
>

> Lapack is a library not part by Python(x, y) -http://www.netlib.org/lapack

[Grizzly Nyo]

Pepe Hi,

Googling suggests that there is a mix and match of Fortran compilers.

http://www.cpmd.org/pipermail/cpmd-list/2007-June/003934.html

On Sep 21, 5:19 pm, pepe <balazovic.pe...@gmail.com> wrote:
> Gabi,
>
> Well, I am trying to do it as you suggested...
> No success yet I would need some help here.
>
> What I did:

> I downloaded lapack.lib and blas.lib as  pre-built libs fromhttp://icl.cs.utk.edu/lapack-for-windows/

[Peter Balazovic]

I think I do not have correct LAPACK/BLAS installation. I just copied lapack.lib and blas.lib in python searchable path.

Up to now I am not able to correctly understand how LAPACK installtion should be performed under Windows. It seems to be really tricky and Pythonxy does not have any LAPACK in.

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