https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64825
Bug ID: 64825
Summary: -Wcast-qual does not warn about struct members which
are arrays
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dimitry at andric dot com
I'm not sure if it is intentional in gcc, but when using -Wcast-qual, it does
not warn about casting away the constness of struct members which are arrays.
For example, in this minimal test case:
struct foo {
int bar[1];
};
void *baz(const struct foo *f)
{
void *p = (void *)&f->bar;
return p;
}
Compiled with gcc version 5.0.0 20150111 (experimental) (FreeBSD Ports
Collection), using -Wcast-qual, this gives no warning at all.
Compiled with clang version 3.6.0 (branches/release_36 226102), using
-Wcast-qual, gives the expected:
foo.c:7:20: warning: cast from 'int const (*)[1]' to 'void *' drops const
qualifier [-Wcast-qual]
void *p = (void *)&f->bar;
^
1 warning generated.
