conflicting types for getline function

Question

I have a function for getline function in my code block.But while compiling the make file i get the following error:

cc -DMAIN   -c -o terp.o terp.c
terp.c:130:15: error: conflicting types for ‘getline’
In file included from terp.c:2:0:
/usr/include/stdio.h:675:20: note: previous declaration of ‘getline’ was here 
make: *** [terp.o] Error 1

The part terp.c around 130:

 PRIVATE char *getline()
 {
static int first_time_called=1;
if(!first_time_called)
    return 0;
first_time_called=0;
return Expr;
 }

Answer 1

There are at least three possible solutions.

1. As getline() is not in standard c library, but in POSIX (and GLIBC), there could be switch to disable its extension (they enabled by default in GCC). Try compiling your source with command cc -DMAIN -std=c99 -c -o terp.o terp.c .

2. If you need POSIX extensions, you have to rename your getline() function to something else.

3. Remove #include <stdio.h> from your source, this error message will disappear. But you may become confused if POSIX's getline() is used in your source code, as it will be replaced by yours.

Answer 2

您需要为getline函数选择一个不同的名称，因为标准clib中已经有一个getline 。