Re: [Lapackpp-devel] lapack++ for msys/windows xp

[Christian S. <sti...@tu...>]

Hi,

Am Sonntag, 9. April 2006 04:38 schrieb Andrew Oh:
> Hey, I'm new to UNIX so I apologize in advance if my questions seem stupid.

no problem. That's what this mailing list is for.

> I installed the windows lapack++ file "lapackpp-2.4.7-setup.exe" into
> C:\msys\1.0\lib\lapackpp. I copy and pasted all the header files as
> well as the "liblapack32.dll" (the shared library) into
> C:\msys\1.0\mingw\include\lapackpp
>
> To compile my program, I type in:
> >>g++ program.cpp -IC:/msys/1.0\mingw/include/lapackpp
> >>-LC:/msys/1.0\mingw/include/lapackpp -llapackpp
>
> The first argument with -I is for the header file location, the second
> argument with -L is for the location of "liblapackpp.dll", and the
> third argument with -l is for lapackpp.

Right. Correct so far.

> The program doesn't compile and I don't know what is wrong. I get
>
> >>C:\msys\1.0\mingw\bin\..\lib\gcc-lib\mingw32\3.2.3\..\..\..\..\mingw32\bi
> >>n\ld.exe:
>
> cannot >>find -llapackpp

Oh, sorry. My directions in the README were not completely correct.

> I believe that I installed the header files correctly 

Yes. If that were a problem, you would have gotten error messages like 
"lapackpp.h: file not found".

> but I'm not sure if I handled the "liblapackpp.dll" correctly. 

Yes. Sorry, my directions were incorrect; if the DLL is called 
liblapackpp32.dll, you need to write "-llapackpp32" in the compiler command 
i.e. the file name of the DLL without the leading "lib" and without the 
trailing ".dll" but everything in between.

> Also, I do not know 
> anything about the "library itself"... namely lapackpp. I have no yet
> encountered a "lapackpp.lib" or anything of that sort.

The compiler "gcc" doesn't need a ".lib" library anymore. For gcc, it is 
sufficient to only have the ".dll" file available. The ".lib" is something 
which was needed for MSVC. (By the way, the source package 
"lapackpp-2.4.7.tar.gz" also includes a project file if you want to build the 
library on your own in MSVC; we cannot distribute a pre-compiled DLL for MSVC 
due to licensing restrictions.)

> Also, one last thing I'm worried about is your README for the windows
> installation. It mentions entering into the UNIX command line
>
> ./configure --prefix=/directory/
> make
> make install
>
> Do I really need to worry about this? 

No. That is applicable only if you want to compile lapackpp32.dll yourself.

> Or is just executing 
> 'lapackpp-2.4.7-setup.exe' enough to set everything up?

Yes.

Regards,

Christian