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[Lapack] clapack warning: implicit declaration of function ‘f2c_idamax’

Dear there,

I followed the installation steps carefully, using the reference BLAS,  
and I can compile a small example. Even though the annoying message  
appears, the generated binary can run and gives correct result. Does  
the warning mean anything?
Also I am wondering why the function is idamax_(), while in many  
documents and webpage, it is called cblas_idamax_()? Would I encounter  
portability difficulty using this name?

Thanks for the package!

Michael Chen

gcc -g -Wall -pedantic -I/Users/michaelchen/Documents/mycode/ 
CLAPACK-3.2.1/INCLUDE -I/Users/michaelchen/Documents/mycode/ 
mischeaders    idamax.c  /Users/michaelchen/Documents/mycode/ 
CLAPACK-3.2.1/blas_OS.a /Users/michaelchen/Documents/mycode/ 
CLAPACK-3.2.1/F2CLIBS/libf2c.a -lm -o idamax
idamax.c: In function ?main?:
idamax.c:12: warning: implicit declaration of function ?f2c_idamax?

#include <stdlib.h>
#include <stdio.h>
#include "f2c.h"
#include "blaswrap.h"

int main(){
  integer N = 5;
  double a[5]={9,2,2,10,3};
  int r=0;
  integer incr=1;
  r = idamax_(&N, a, &incr);
  return 0;

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