Why do I get a warning every time I use malloc?

Question

If I use malloc in my code:

int *x = malloc(sizeof(int));

I get this warning from gcc:

new.c:7: w         


        

Answer 1

Beside the other very good answers, I would like to do a little nitpick and cover something what is not discussed yet in the other answers.

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When you are at Linux, To use malloc() in your code,

You don´t actually have to #include .

(Although the use of stdlib.h is very common and probably every non-toy-program should include it either way because it provides a wide range of useful C standard library functions and macros)

You could also #include instead.

But please note that the use of malloc.h is deprecated and it makes your code non-portable. If you want to use malloc() you should always and ever (except for explicit reasons to do otherwise) #include .

The reasons why, are best explained in the answers to this question:

difference between and