[R] again question about nmath/standalone

[xt_wang@cs.concordia.ca]

Thanks every expert! I have fixed the problem that I can use R library in c 
code right now. 

However, it still has problem that I can not compile the c code. I attach the 
operation process to this letter. Who is so kind to help me find where is the 
problem? Thnaks in advance!

[credsim at confsys ~/src]$ gcc test1.c -o test1 -lRmath -lm
/tmp/ccYbnKy1.o(.text+0xd0): In function `main':
: undefined reference to `dim'
/tmp/ccYbnKy1.o(.text+0xdf): In function `main':
: undefined reference to `c'
/tmp/ccYbnKy1.o(.text+0xee): In function `main':
: undefined reference to `solve'
collect2: ld returned 1 exit status


test1.c code is as follow:

[credsim at confsys ~/src]$ vi test1.c

#define MATHLIB_STANDALONE
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include </usr/local/lib/R/include/Rmath.h>


 main()
{

  int i,j,I,J,n;

  I=3;
  J=3;
  n=I*J;

  double valin;
  double x2[9];


  FILE *in_file;


    /* input x value from file data_2Dx.txt */
    in_file=fopen("data_2Dx.txt","r");
        if (in_file==NULL)
        {/*Test for error*/
                fprintf(stderr,"Error:Unable to input file 
from 'data_2Dx.txt'\n");
                exit(8);
        }
        for( i=0;i<n;i++)
         /* for (j=0;j<J;j++)*/
          { fscanf(in_file, "%lf\n", &valin, stdin);/* read a single double 
value in */
               x2[i]=valin;
                   valin=0.0;
          }
        fclose(in_file);


   dim(x2)<-c(3,3);
   solve(x2);

   return (0);
   

}