Calling fortran function

New to Julia
,
8

You should pass arrays as Ref{T} where T is the element type. Array should basically never appear in a ccall signature, as it is a Julia object (and no C libraries that I know of expect to be passed Julia arrays).

i.e. try:

ccall(("sqrinr_","qrupdate-1.1.2/libqrupdate"), Void, 
    (Ref{Int64}, Ref{Int64}, Ref{Float64}, Ref{Int64}, Ref{Float64}, Ref{Int64}, Ref{Int64}
, Ref{Float64}, Ref{Float64}), 
    n, q, Q, n+1, R, n+1, n, xp, w)