Thanks, worked great.
Alan
On Tuesday, 2 September 2014 14:55:47 UTC+1, Andreas Noack wrote:
>
> When the function you are calling is void you should use Void as the
> return type instead of the first (Int, Ptr{Float64},Ptr{Float64}), i.e.
>
> ccall( (:cc, "sparselib"), Void, (Int, Ptr{Float64},Ptr{Float64}),n,x,w)
>
> Med venlig hilsen
>
> Andreas Noack
>
>
> 2014-09-02 9:04 GMT-04:00 Alan Crawford <[email protected] <javascript:>
> >:
>
>> hi!
>>
>> i'm trying to use ccall in the following example:
>>
>> julia> x = zeros(10)
>> 10-element Array{Float64,1}:
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>>
>> julia> w = zeros(10)
>> 10-element Array{Float64,1}:
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>> 0.0
>>
>> julia> n = 4
>> 4
>> julia> ccall( (:cc, "sparselib"), (Int, Ptr{Float64},Ptr{Float64}), (Int,
>> Ptr{Float64},Ptr{Float64}),n,x,w)
>> ERROR: error compiling anonymous: in anonymous: ccall: missing return type
>>
>> the calling interface of the cc function is
>>
>> void cc ( int n, double x[], double w[] )
>>
>> ie it returns nothing.
>>
>> i compiled this library and it seems to work:
>>
>> julia> ccall( (:cpu_time, "sparselib"), Int32, ())
>>
>> 2395765
>>
>> thanks!
>>
>>
>>
>>
>
