undefined reference to `getline' in c

Question

I am learning to use getline in C programming and tried the codes from http://crasseux.com/books/ctutorial/getline.html

#include 
#include <         


        

Answer 1

getline isn't a standard function, you need to set a feature test macro to use it, according to my man page,

_POSIX_C_SOURCE >= 200809L || _XOPEN_SOURCE >= 700

for glibc 2.10 or later,

_GNU_SOURCE

before that.