-----Original Message----- From: Gedare Bloom <ged...@rtems.org> Sent: Tuesday, March 2, 2021 14:01 To: Kinsey Moore <kinsey.mo...@oarcorp.com> Cc: devel@rtems.org Subject: Re: [PATCH v2 2/3] cpukit: Explicitly enforce alignment requirements
> On Tue, Mar 2, 2021 at 12:48 PM Kinsey Moore <kinsey.mo...@oarcorp.com> wrote: >> +/* >> + * The use of explicit alignment is necessary below due to behavioral >> + * expectations of GCC on which RTEMS has relied in the past. These >> + * behaviors were consistent, but never guaranteed. Some newer platforms >> + * violate this previous consistency. For more information, see GCC bug >> + * https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99143 >> + */ > I think the comment can be simplified, but I can tell you got bugged > by this. (pun, intended) > > To summarize my understanding, GCC now optimizes space more > aggressively, and if we want an explicit alignment, it has to be > explicitly made on each variable that must be aligned. ("typedef" > alignment now seems to be ignored.) I'll trim it down in the next patch set. Thanks, Kinsey _______________________________________________ devel mailing list devel@rtems.org http://lists.rtems.org/mailman/listinfo/devel
