From: Tom Tromey <tom@tromey.com>
To: Pedro Alves <palves@redhat.com>
Cc: Simon Marchi <simon.marchi@polymtl.ca>,
asmwarrior <asmwarrior@gmail.com>,
GDB Development <gdb@sourceware.org>
Subject: Re: gcc warning with "some variable may be used uninitialized in this function [-Wmaybe-uninitialized]" when building under msys
Date: Fri, 05 Oct 2018 05:08:00 -0000 [thread overview]
Message-ID: <87d0spf0au.fsf@tromey.com> (raw)
In-Reply-To: <8305e255-1621-96a7-cf06-3cd1cd27ceae@redhat.com> (Pedro Alves's message of "Thu, 4 Oct 2018 13:39:55 +0100")
>>>>> "Pedro" == Pedro Alves <palves@redhat.com> writes:
Pedro> If the warnings confuse people too much, I'd be OK with
Pedro> disabling -Wmaybe-uninitlized completely. I left it as a
Pedro> -Wno-error warning because even though it produces false positives,
Pedro> it also helps catch bugs earlier in the compile-edit cycle,
Pedro> when you're hacking some code, when you're introducing
Pedro> uninitialized uses, and "make" ends up compiling just a few
Pedro> files.
It caught a bug in the -Wshadow=local series; and I think in most cases
the false reports are easily handled with an initialization. I suppose
in theory these initializations could themselves mask bugs, but I don't
recall that ever actually happening (or at least being noticed).
It would be good if gcc could recognize std::optional and not issue the
warning when it is used. Perhaps gdb could then just always use
optional for the maybe-not-initialized cases.
Tom
next prev parent reply other threads:[~2018-10-05 5:08 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-04 6:28 asmwarrior
2018-10-04 12:01 ` Simon Marchi
2018-10-04 12:40 ` Pedro Alves
2018-10-05 5:08 ` Tom Tromey [this message]
2018-10-09 10:34 ` Pedro Alves
2018-10-09 19:34 ` Tom Tromey
2018-10-09 19:54 ` Pedro Alves
2018-10-09 20:01 ` Pedro Alves
2018-10-09 20:04 ` Tom Tromey
2018-10-04 12:41 ` Tom Tromey
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