]> Hi All, I'm trying to call a numerical routine I wrote in caml from c. I'm using the -output-obj option of ocamlopt, and have stub functions in c that convert the parameters. Since it's for numerics, I want to pass arrays of doubles. So I use make_float_array from below to convert a 4dimensional doube array into a value ready to be passed to caml. value make_float(double *d) { /* value of d intentionally ignored while we debug... */ return copy_double(0.0); } #define NUM_DIMS 4 value make_float_array(double *ds) { int i; double* p[NUM_DIMS+1]; p[NUM_DIMS]=NULL; for (i=0; i<NUM_DIMS; i++) p[i] = &(ds[i]); return alloc_array(make_float,p); } The caml code gets called correctly, and from within it I can see that the length or the arrays and the content are bogus (they come out length 2, not 4, with the first elements looking like this: 62.6141, not 0.0). If I pass a non-array double using copy_double(), it works and I get the correct number on the other side. Any ideas as to where I've gone wrong? Thanks, Daniel. ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners