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Old 10-22-2006, 12:55 AM   #1
lilili
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undefined reference to readline


hello everyone
I've just install readline 5.1 tgz.
I have a c code with readline function in it.
I've #include <readline/readline.h> and #include <readline/history.h> but when I try to compile with gcc code.c -o code
gcc complains about undefined reference to readline

thank you
 
Old 10-22-2006, 09:40 AM   #2
indienick
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I would suggest putting readline.h and history.h in /usr/include/ (not in /usr/inclue/readline/ - as I've assumed you've done).
Code:
#include <readline.h>
#include <history.h>
If that would cause problems (due to similarily named headers) use the double quotes and specify the absolute path:
Code:
#include "/usr/include/readline/readline.h"
#include "/usr/include/readline/history.h"
I am by no means a C/C++ programmer, but I don't see anything that could go horrifically wrong.

Last edited by indienick; 10-22-2006 at 09:42 AM.
 
Old 10-22-2006, 10:59 AM   #3
ntubski
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I think you just need to compile with gcc -lreadline code.c -o code
 
Old 10-22-2006, 02:27 PM   #4
lilili
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Quote:
Originally Posted by indienick
I would suggest putting readline.h and history.h in /usr/include/ (not in /usr/inclue/readline/ - as I've assumed you've done).
Code:
#include <readline.h>
#include <history.h>
If that would cause problems (due to similarily named headers) use the double quotes and specify the absolute path:
Code:
#include "/usr/include/readline/readline.h"
#include "/usr/include/readline/history.h"
I am by no means a C/C++ programmer, but I don't see anything that could go horrifically wrong.

when I try both your suggestions it gives me the same complain, undefined reference to readline

Thank you
 
Old 10-22-2006, 02:28 PM   #5
lilili
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Quote:
Originally Posted by ntubski
I think you just need to compile with gcc -lreadline code.c -o code
Here is my o/p when I try your solution
/usr/lib/gcc/i486-slackware-linux/3.4.5/../../../libreadline.so: undefined refer ence to `tgetnum'
/usr/lib/gcc/i486-slackware-linux/3.4.5/../../../libreadline.so: undefined refer ence to `tgoto'
/usr/lib/gcc/i486-slackware-linux/3.4.5/../../../libreadline.so: undefined refer ence to `tgetflag'
/usr/lib/gcc/i486-slackware-linux/3.4.5/../../../libreadline.so: undefined refer ence to `BC'
/usr/lib/gcc/i486-slackware-linux/3.4.5/../../../libreadline.so: undefined refer ence to `tputs'
/usr/lib/gcc/i486-slackware-linux/3.4.5/../../../libreadline.so: undefined refer ence to `PC'
/usr/lib/gcc/i486-slackware-linux/3.4.5/../../../libreadline.so: undefined refer ence to `tgetent'
/usr/lib/gcc/i486-slackware-linux/3.4.5/../../../libreadline.so: undefined refer ence to `UP'
/usr/lib/gcc/i486-slackware-linux/3.4.5/../../../libreadline.so: undefined refer ence to `tgetstr'
collect2: ld returned 1 exit status



Thank you
 
Old 10-22-2006, 09:21 PM   #6
ntubski
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According to my manpages those functions are part of the ncurses library. Do you have #include <curses.h> and #include <term.h>? Maybe try
gcc -lreadline -lncurses code.c -o code
 
Old 10-22-2006, 10:28 PM   #7
lilili
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Quote:
Originally Posted by ntubski
According to my manpages those functions are part of the ncurses library. Do you have #include <curses.h> and #include <term.h>? Maybe try
gcc -lreadline -lncurses code.c -o code
ntubski, You are the man.
It works just like I want it.

Thank you very much
 
  


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