[julia-users] Call Julia from a c++ shared lib

[jqian via julia-users]

I am trying to call Julia from C++ shared library.  From the log, it seems 
the call to jl_eval_string("sqrt(2.0)") return correct value.
The problem is that the function  CPPCallJulia::gssqrt( ) never return to 
caller ( If I remove Julia function, it works fine).


g++ -c -W -O3 -m64 -fPIC CPPCallJulia.cpp  -I$JULIA_DIR/include/julia
g++ -O3 -shared -m64 -WI  -fPIC -o./libCPPCallJulia.so CPPCallJulia.o 
-L$JULIA_DIR/lib/julia -lm -ljulia


Thanks for the help.
Jason
string CPPCallJulia::gssqrt(const vector<string> & args)
{
    ofstream f("/home/ju_log.txt",ios::out);
    stringstream s;
    double result=1000;

    jl_init("/home/Julia/julia-2e358ce975/bin");
        jl_value_t *ret = (jl_value_t*)jl_eval_string("sqrt(2.0)");
        if (jl_is_float64(ret)) {
                result = jl_unbox_float64(ret);
        }

jl_atexit_hook(0);

    s << result;

      if(f.is_open()){
           f<<"=== result ";
           f<<s.str();
           f.close();
      }
    return s.str();
}