Americo Barbosa da Cunha Junior wrote:
I've trying to call a Fortran subroutine in a C++ code.
Below you can see the declaration of the subroutine and the part of C++
code that call it.
extern "C" {
extern void F_(int *n, double *tn, double *y, double *ftem, double
*rpar, int *ipar);
}
// Jacobian
void jacobian(double **Jac, double *savf, double *y, double dt, int n)
{
int i,j;
double *ftem = malloc_vector(n); // Vetor com Reaction Mapping
Perturbado double *rpar = malloc_vector(n); // Vetor de
trabalho double
int *ipar = malloc_ivector(n); // Vetor de trabalho inteiro
double *EWT = vector_ewt(y,n); // Error Weight Vector
double u = uround(); // Roundoff
double R, R0, FAC, tn;
FAC = vector_wnorm(savf,EWT,n);
R0 = 1000*fabs(dt)*u*FAC*(double)n;
if( R0 == 0.0)
R0 = 1.0;
for(i = 0; i < n; i++)
{
R = max(sqrt(u)*fabs(y[i]),R0/EWT[i]); // Perturba??o
y[i] += R; //
Perturbando o vetor composicao
F_(&n,&tn,y,ftem,rpar,ipar); // Preenche o
ftem com o Reaction Mapping perturbado
FAC = 1.0/R;
for(j = 0; j < n; j++)
Jac[i][j] = (ftem[j]-savf[j])*FAC;
} }
Whem I try to link both languages the compiler returns the following
error message: undefined reference to 'F_'
I did all procedures described in :
http://www.physics.utah.edu/~detar/phycs6720/handouts/fortran_binding.html
Did you notice they used lower case names? A pity they didn't advice
you to run nm or the like on the individual .o files to help you resolve
any such discrepancies. Fortran compilers, by default, collapse the
linkage names to all lower (in the case of GNU fortran) or all upper case.
