RE: [LIP] alloc functions and stdlib...

Well, I'm not very sure about this, but at compilation time, when you don't
include the stdlib.h, the function is assumed to be implicitly defined, so
the compiler doesn't care (and know) what the function's signature is like
(try passing more than one parameter to malloc and you would see it compile
and link just fine), also it assumes that function returns an interger. The
linker finds the malloc (or _malloc perhaps) symbol somewhere within the
libraries and links to that. 

So, it sees the conversion from assumed interger return type of malloc to a
char * or whatever, and reports a compile time warning.

When you include stdlib.h, it knows what you malloc function looks like and
reports no error (pointer to pointer conversion). It would also issue errors
if singnatures don't match.

Uday K Verma 

-----Original Message-----
From: linux-india-programmers-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
[mailto:linux-india-programmers-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org] On Behalf Of
Sameer Oak
Sent: Wednesday, April 21, 2004 08:46 AM
To: linux-india-programmers-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: [LIP] alloc functions and stdlib...


alloc functions, malloc(), calloc(), realloc() need not type cast the return
value if stdlib.h is included.
what's the reason?
-
sameer oak.


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