Hi,
On Wed, 19 Oct 2016 14:47:48 +0000 (UTC) Gianfranco Costamagna
<locutusofborg@debian.org> wrote:
> Source: gcc
> Version: 6.2.0-7
> Severity: serious
>
> As said, I built virtualbox correctly with 6.2.0-6 and then uploaded on unstable.
> The new gcc 6.2.0-7 broke the build with the following error:
[...]
> /usr/include/x86_64-linux-gnu/sys/inotify.h:34:13: error: flexible array member 'inotify_event::name' not at end of 'struct InotifyEventWithName'
Relevant parts:
cdefs.h
-------
# define __flexarr []
inotify.h
------------
/* Structure describing an inotify event. */
struct inotify_event
{
int wd; /* Watch descriptor. */
uint32_t mask; /* Watch mask. */
uint32_t cookie; /* Cookie to synchronize two events. */
uint32_t len; /* Length (including NULs) of name. */
char name __flexarr; /* Name. */
};
HostDnsServiceLinux.cpp:
------------
struct InotifyEventWithName
{
struct inotify_event e;
char name[NAME_MAX];
};
While I do not know if this is a GCC bug or not, doing the above is a
bit dodgy (and prohibited by C99). What is the offset of
InotifyEventWithName::name supposed to be (given sizeof(inotify_event)
is undefined)?
This report has some info about GCC 6 changes in this regard:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69550
Since it's closed as WONTFIX, I expect this will not be changed in gcc.
Thanks,
James
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