the following file
================================= foo.c ============================
#include <alloca.h>
#include <string.h>
#include <stdlib.h>
extern void bar (char*, char*);
void foo (const char *name, const char *type)
{
{
size_t name_len = strlen (name);
char *name_temp = (char *) alloca (name_len);
if (name_len > 0)
memcpy (name_temp, name, name_len);
{
char name_copy[name_len + 2];
memcpy (name_copy, name_temp, name_len);
name_copy[name_len] = '$';
name_copy[name_len + 1] = '\0';
{
size_t type_len = strlen (type);
char *type_temp = (char *) alloca (type_len);
if (type_len > 0)
memcpy (type_temp, type, type_len);
{
char type_copy[type_len + 2];
memcpy (type_copy, type_temp, type_len);
type_copy[type_len] = '$';
type_copy[type_len + 1] = '\0';
{
bar (name_copy, type_copy);
}
}
}
}
}
}
================================= foo.c ============================
produces this warning:
$ gcc -c foo.c
foo.c: In function `foo':
foo.c:21: warning: alloca()ed storage released along with dynamically-sized auto
objects
on this system: "gcc (GCC) 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)"
--
Summary: strange warning about alloca
Product: gcc
Version: 3.4.2
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: sds at gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19881
