Patrick Perry wrote:
> Xiao-Yong Jin wrote:
Apart from some warnings, the library compiles fine in my
system. But there is a minor issue about the library it
links against when `./Setup test'. I need to use `-lcblas'
instead of `-lblas' to get it to link to correct libraries.
I don't know other people's system. But in my system,
Gentoo Linux, I use blas library provided by atlas, and
libblas.so is a fortran library and libcblas.so is for C.
I don't know of a good way to get around this. It seems like every
system has a different convention for the location and name of the cblas
libraries. So, everyone has to edit the "extra-libraries" and the
"extra-lib-dirs" field in the blas.cabal file. Does anyone know of a
better way of doing this?
A possible solution is using flags in the cabal configuration file. For
instance, I have this in hmatrix.cabal:
if flag(mkl)
if arch(x86_64)
extra-libraries: gsl mkl_lapack mkl_intel_lp64 mkl_sequential mkl_core
else
extra-libraries: gsl mkl_lapack mkl_intel mkl_sequential mkl_core
else
extra-libraries: gsl blas lapack
so if I want to link with Intel's MKL optimized blas/lapack instead of
ATLAS I simply add the -fmkl flag:
runhaskell Setup.lhs configure -fmkl etc.
or even
cabal install hmatrix -fmkl
Other flags can be added to support different distributions. We could
have something like
cabal install package -ffedora
or
cabal install package -fcblas
etc.
Alberto
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