Strange warning...

[Gary E. Miller]

Yo Hal!

On Mon, 25 Aug 2025 20:48:55 -0700
Hal Murray via devel <devel at ntpsec.org> wrote:

> Anybody understand this one?

Yeah.  Type Cassting is now considered suspect, if not totally bad.

> That's running on a Pi 1, with -O3
>   cc (Raspbian 6.3.0-18+rpi1+deb9u1) 6.3.0 20170516
>   Raspbian GNU/Linux 9 (stretch) 9.13
> No warning with -O1
> 
> ../../ntpd/ntp_util.c:566:2: warning: dereferencing type-punned
> pointer will break strict-aliasing rules [-Wstrict-aliasing]
> 
>         refid_t refid = *(const uint32_t*)rbufp->pkt.refid;


include/recvbuff.h:	struct parsed_pkt pkt;  /* host-order copy of data from wire */

pkt is NOT a (const uint32_t *)

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588

	    Veritas liberabit vos. -- Quid est veritas?
    "If you can't measure it, you can't improve it." - Lord Kelvin
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