@node alloca, memory
@findex alloca
@subheading Syntax

@example
#include <stdlib.h>

void *alloca(size_t _size)
@end example

@subheading Description

Allocate memory that will be automatically released when the current
procedure exits.  Note that, when compiling with gcc, alloca is a
built-in function and not a library call.

@subheading Return Value

A pointer to the memory, else NULL.

@subheading Portability

@portability !ansi, !posix

@subheading Example

@example
q = alloca(strlen(x)+1);
strcpy(q, x);
@end example