C library linking in linux - c

Question

I have been working on a C code for which I needed some functions of libxls.h header files. I have already downloaded the corresponding files and followed the installation instruction. The files also contained a test C code (test.c) which I tried compiling. The results were as follow:
Command to compile the test.c file-
gcc test.c -lm
Results:
[root#XXXXXXX95549 test]# gcc test.c -lm
test.c:28:24: error: libxls/xls.h: No such file or directory
test.c: In function ‘main’:
test.c:33: error: ‘xlsWorkBook’ undeclared (first use in this function)
test.c:33: error: (Each undeclared identifier is reported only once
test.c:33: error: for each function it appears in.)
test.c:33: error: ‘pWB’ undeclared (first use in this function)
test.c:34: error: ‘xlsWorkSheet’ undeclared (first use in this function)
test.c:34: error: ‘pWS’ undeclared (first use in this function)
test.c:39: error: ‘WORD’ undeclared (first use in this function)
test.c:39: error: expected ‘;’ before ‘t’
test.c:53: error: ‘t’ undeclared (first use in this function)
test.c:58: error: ‘tt’ undeclared (first use in this function)
test.c:60: error: dereferencing pointer to incomplete type
test.c:63: error: dereferencing pointer to incomplete type
test.c:64: error: dereferencing pointer to incomplete type
test.c:66: error: dereferencing pointer to incomplete type
test.c:67: error: dereferencing pointer to incomplete type
test.c:68: error: dereferencing pointer to incomplete type
test.c:70: error: dereferencing pointer to incomplete type
test.c:70: error: dereferencing pointer to incomplete type
test.c:71: error: dereferencing pointer to incomplete type
To solve this problem, I copied the library files at the '/user/include' location
After which the results for same compilation commands were:
[root#XXXXXX95549 test]# gcc test.c -lm
/tmp/cc8DJETV.o: In function `main':
test.c:(.text+0x14): undefined reference to `xls_open'
test.c:(.text+0xd4): undefined reference to `xls_getWorkSheet'
test.c:(.text+0xe4): undefined reference to `xls_parseWorkSheet'
test.c:(.text+0xf0): undefined reference to `xls_getCSS'
test.c:(.text+0x49c): undefined reference to `xls_showBookInfo'
collect2: ld returned 1 exit status
Please, explain how can I rectify this problem.
The code test.c is given below:
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <libxls/xls.h>
int main()
{
xlsWorkBook* pWB;
xlsWorkSheet* pWS;
FILE *f;
int i;
struct st_row_data* row;
WORD t,tt;
pWB=xls_open("files/test2.xls", "ASCII"); // "KOI8-R"
if (pWB!=NULL)
{
f=fopen ("test.htm", "w");
for (i=0;i<pWB->sheets.count;i++)
printf("Sheet N%i (%s) pos %i\n",i,pWB->sheets.sheet[i].name,pWB->sheets.sheet[i].filepos);
pWS=xls_getWorkSheet(pWB,0);
xls_parseWorkSheet(pWS);
fprintf(f,"<style type=\"text/css\">\n%s</style>\n",xls_getCSS(pWB));
fprintf(f,"<table border=0 cellspacing=0 cellpadding=2>");
for (t=0;t<=pWS->rows.lastrow;t++)
{
row=&pWS->rows.row[t];
// xls_showROW(row->row);
fprintf(f,"<tr>");
for (tt=0;tt<=pWS->rows.lastcol;tt++)
{
if (!row->cells.cell[tt].ishiden)
{
fprintf(f,"<td");
if (row->cells.cell[tt].colspan)
fprintf(f," colspan=%i",row->cells.cell[tt].colspan);
// if (t==0) fprintf(f," width=%i",row->cells.cell[tt].width/35);
if (row->cells.cell[tt].rowspan)
fprintf(f," rowspan=%i",row->cells.cell[tt].rowspan);
fprintf(f," class=xf%i",row->cells.cell[tt].xf);
fprintf(f,">");
if (row->cells.cell[tt].str!=NULL && row->cells.cell[tt].str[0]!='\0')
fprintf(f,"%s",row->cells.cell[tt].str);
else
fprintf(f,"%s"," ");
fprintf(f,"</td>");
}
}
fprintf(f,"</tr>\n");
}
fprintf(f,"</table>");
printf("Count of rows: %i\n",pWS->rows.lastrow);
printf("Max col: %i\n",pWS->rows.lastcol);
printf("Count of sheets: %i\n",pWB->sheets.count);
fclose(f);
xls_showBookInfo(pWB);
}
return 0;
}
Thanks in advance,

Answer 1

Got the answer to this question on the following location:
http://www.cprogramdevelop.com/2018568/
Those who might be facing the problem with libxls library can refer the above mentioned website.
cheers