Hello colleagues,
many thanks for the previous postings, however i still miss something...
My example, test_julia_u1.jl
x1 = Cfloat[2.0];
dump(x1);
ccall((:u1,"./u1.so"),Void,(Ptr{Float64},),x1);
dump(x1);
calls u1.c / u1.so
void u1(double *x) {
*x += 1.0; }
Rather unexpected is the 0 output:
lobi@m2:~/juliarepo$ ../julia/julia test_julia_u1.jl
Array(Float32,(1,)) [2.0f0]
Array(Float32,(1,)) [0.0f0]
especially because c does it:
lobi@m2:~/juliarepo$ ./test_main_u1
3.000000 2.000000
with
#include <stdio.h>
void main() {
double c,d;
c = 2.0;
d = c;
u1(&c);
printf("%f %f",c,d); }
?
