string reversing function strrev() errors

I used strrev() to reverse a string ..

Code:

---

# include <stdio.h>
# include <string.h>

int main (void)
{
  char str[50];

  fputs("enter",stdout);
  fgets(str, sizeof(str),stdin); strrev(str);
  fputs(str,stdout);
}

---

.. its showing the following error

PHP Code:

---

/tmp/cc6O6bIr.o: In function `main':
reversew.c:(.text+0x62): undefined reference to `Strrev'
collect2: ld returned 1 exit status 


---

strrev() is not a standard function.

actually i use gnu c ....
I referred the first link that you mentioned but couldn't find any standard function that reverses a string.. what I should use.
Actually I referred a text book in which strrev() is mentioned to reverse a string..

Some Linux implementations may well have it, but it's not standard, and if you don't have it and you need it that means you have to write it.

reversew.c:(.text+0x62): undefined reference to `Strrev'

Did you just copy/paste the error or type in??! Notice the 'S'trrev