You can build Julia with MKL (see the build instructions in the README).
Then you example (slightly modified) simply works by:
julia> function myasum(n::Integer, X::Vector{Float64}, incx::Integer)
ccall((:cblas_dasum, :libmkl_rt),
Float64,
(Int64, Ptr{Float64}, Int64),
n, X, incx)
end
myasum (generic function with 1 method)
julia> X = Float64[1,2,3]
3-element Array{Float64,1}:
1.0
2.0
3.0
julia> myasum(3,X,1)
6.0
To get your paths right, try the equivalent of
source /opt/intel/composer_xe_2015/mkl/bin/mklvars.sh intel64 ilp64
On Friday, October 16, 2015 at 9:37:13 PM UTC+2, Lionel du Peloux wrote:
>
>
> Dear all,
>
> I'm struggling with the Julia C-API. I've installed the last version of
> the Intel Composer on my Mac (MKL & C++ compiler).
> I thought I could call MKL directly from Julia with the C-API as explained
> in the doc, using MKL Single Dynamic Library
> <https://registrationcenter.intel.com/irc_nas/2690/mkl_userguide_mac.pdf>(SDL)
>
> model.
>
> I've tried to wrap the asum for double (inspired by the Base.LinAlg.BLAS
> source code) :
>
> function myasum(n::Integer, X::Vector{Float64}, incx::Integer)
> ccall((:cblas_dasum, "/opt/intel/mkl/lib/libmkl_rt"),
> Float64,
> (Ptr{Int64}, Ptr{Float64}, Ptr{Int64}),
> &n, X, &incx)
> end
>
> X = Float64[1,2,3]
> myasum(3,X,1)
>
> It seems the dylib is reached and the "cblas_dasum" is the right name to
> call (otherwidse I get some errors about that).
>
> But now my Julia gets into this error :
> Intel MKL FATAL ERROR:
> Cannot load libmkl_intel_thread.dylib.
>
> I've tried to add /opt/intel/mkl/lib and /opt/intel/lib directories to my
> PATH, but I still get the same error ...
>
> Do you have any though how I can make it work ??
>
> Thank you for helping,
> Lionel
>
>
>
>
>
>
>
