RE: BUG #15280: Clang 6.0.1 compiler warning - strlcpy

From: Tom Lane [mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us]
Sent: 16 July 2018 16:27
To: Steven Winfield
Cc: pgsql-bugs(at)lists(dot)postgresql(dot)org
Subject: Re: BUG #15280: Clang 6.0.1 compiler warning - strlcpy

=?utf-8?q?PG_Bug_reporting_form?= <noreply(at)postgresql(dot)org> writes:
> While compiling 11beta2 using clang 6.0.1 this warning crops up quite a lot
> in an otherwise quiet build process - so I thought it might be of
> interest:
> pg_rewind.c:724:4: warning: implicitly declaring library function 'strlcpy'
> with type 'unsigned long (char *, const char *, unsigned long)'
> [-Wimplicit-function-declaration]

Yeah, this is a known problem caused by autoconf doing its "is this
function declared" test in a way that clang doesn't play nice with.

There's a fix for this upstream:

http://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=82ef7805faffa151e724aa76c245ec590d174580<http://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=82ef7805faffa151e724aa76c245ec590d174580>

and we've been patiently waiting for an autoconf release that
incorporates it ...

Thanks - I'll add my voice to the release requests.

Steve

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