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Subject: Re: bt_split.c error: dereferencing type-punned pointer will break
 strict-aliasing rules (powerpc64-xtoolchain use)
From: Craig Rodrigues <rodrigc@crodrigues.org>
To: Mark Millard <markmi@dsl-only.net>
Cc: FreeBSD PowerPC ML <freebsd-ppc@freebsd.org>, 
 FreeBSD Toolchain <freebsd-toolchain@freebsd.org>
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On Sun, Oct 4, 2015 at 4:06 AM, Mark Millard <markmi@dsl-only.net> wrote:

>
> /usr/src/lib/libc/db/btree/bt_split.c:548:7: error: dereferencing
> type-punned pointer will break strict-aliasing rules
> [-Werror=strict-aliasing]
>        bt_preserve(t, *(pgno_t *)bl->bytes) == RET_ERROR)
>

You will get many of these warnings all over the codebase.
You should add NO_WERROR=
to your make invocation, or put NO_WERROR= in make.conf.

That's what I do here:
https://jenkins.freebsd.org/job/FreeBSD_HEAD_amd64_gcc4.9/631/consoleFull

--
Craig