[Haskell-beginners] problem cabal install'ing hmatrix

[Alberto Ruiz]

Erik, if you get

 > # ld -lgsl -llapack -lgslcblas
 > ld: warning: cannot find entry symbol _start; not setting start address

perhaps you only need to uncomment line 141 in hmatrix.cabal and try 
"cabal install" in that folder.

This is not the default because we prefer to link with a possibly 
optimized cblas. Clearly hmatrix requires a previous configure step.

Alberto

Erik Quaeghebeur wrote:
>>>  Original message:
>>> > > > >   $ cabal install hmatrix
>>> > >   Resolving dependencies...
>>> > >   Configuring hmatrix-0.5.1.1...
>>> > >   Preprocessing library hmatrix-0.5.1.1...
>>> > >   running dist/build/Numeric/GSL/Special/Internal_hsc_make failed
>>> > >   command was: dist/build/Numeric/GSL/Special/Internal_hsc_make
>>> > > >   dist/build/Numeric/GSL/Special/Internal.hs
>>> > >   cabal: Error: some packages failed to install:
>>> > >   hmatrix-0.5.1.1 failed during the building phase. The exception 
>>> was:
>>> > >   exit: ExitFailure 1
>>> > > > >   What should I do to diagnose/resolve this problem?
> 
> On Thu, 23 Apr 2009, Alberto Ruiz wrote:
>>
>> Probably a dependency not mentionend in extra-libraries is missing. 
>> There is not a standard way to link -llapack. For instance, in 
>> Ubuntu/Debian we only need gsl and lapack:
>>
>> $ ld -lgsl -llapack
>> ld: warning: cannot find entry symbol _start; not setting start address
>>
>> This means that everything is ok, but in other systems we may also 
>> need some of -l[gsl]cblas, -lgfortran, or -lf77blas, -latlas, -lgcc_s, 
>> etc.
>>
>> Try to find the correct libraries with
>>
>> $ ld -lgsl -llapack -lgslcblas
> 
> # ld -lgsl -llapack -lgslcblas
> ld: warning: cannot find entry symbol _start; not setting start address
> 
>> or other combinations, and modify the extra-libraries field in 
>> hmatrix.cabal. In any case, I will try to add cabal flags to cover 
>> common situations. (There is also a possible issue with ghc-6.8 that 
>> must be fixed, but the library should work ok with 6.10).
> 
> # ghc --version
> The Glorious Glasgow Haskell Compilation System, version 6.8.2
> 
> 
> It seems we still don't know the cause; any more things I can do to 
> diagnose?
> 
> I'll also investigate the possibilities of resolving this issue by using 
> the gentoo haskell overlay or non-stable versions of ghc (6.10) in 
> Gentoo's repository.
> 
> Erik
>