check_c_source_compiles("
#include <stdio.h>
#include <stdlib.h>

void *myalloc(size_t len) __attribute__ ((__malloc__));
void *myalloc(size_t len) { return (NULL); }
int main(int argc, char *argv[])
{
	void *p = myalloc(10);
	return (p != NULL);
}
" HAVE_MALLOC_ATTRIBUTE)