Error Compiling a Simple GSL Program

[<banerjee at wernicke dot ccn dot upenn dot edu>]

Folks,

I am trying to compile a simple GSL program, using cblas_ddot(), 
I am having linking errors. 

Here's the source code (in the file gsl.cpp):

#include <stdio.h>
#include <gsl/gsl_cblas.h>

int main(int argc, char *argv[])
{

  double vec1[10];
  double vec2[10];

  for (int i = 0; i < 10; i++)
  {
    vec1[i] = (double ) i;
    vec2[i] = (double ) i;
  } // for i

  printf("inner prod = [%g]\n", cblas_ddot(10, vec1, sizeof(double), 
  vec2, sizeof(double)));

  return 0;

} // main 


Here's my compilation line:

g++ gsl.cpp -I/usr/local/include -L/usr/local/lib -lgsl -lgslcblas -lm

Here's the error:

/tmp/ccCPxtLp.o: In function `main': 
/tmp/ccCPxtLp.o(.text+0xb9): undefined reference to `cblas_ddot(int,
double const *, int, double const *, int)'
collect2: ld returned 1 exit status

I am using gcc 2.95.2, on a RedHat 6.2 Linux box. The GSL 
include files are in /usr/local/include/gsl and the GSL libraries
are in /usr/local/lib, including libgslcblas.a.

The result of doing "nm libgslcblas.a | grep cblas_ddot" is:

00000000 T cblas_ddot

Thanks for the help.

K. Banerjee