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Date:	Mon, 29 Jul 2013 14:44:08 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: cc1: warning: ../../include/w32api: No such file or directory [enabled by default]
Message-ID:	<20130729124408.GE30069@calimero.vinschen.de>
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References:	<loom DOT 20130724T131352-6 AT post DOT gmane DOT org> <loom DOT 20130729T141755-373 AT post DOT gmane DOT org>
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User-Agent:	Mutt/1.5.21 (2010-09-15)

On Jul 29 12:19, Achim Gratz wrote:
> Achim Gratz <Stromeko <at> NexGo.DE> writes:
> > The above warning appears when -Wmissing-include-dirs is in effect (and
> > aborts compilation if -Werror is also given).  The missing include path
> > seems to be produced by the following compiler spec:
> > 
> > %(cpp_cpu) [...] %{!nostdinc:%{!mno-win32:-idirafter ../include/w32api%s
> > -idirafter ../../include/w32api%s}}
> > 
> > which gets expanded into
> > 
> > -idirafter /usr/lib/gcc/i686-pc-cygwin/4.7.3/../../../../include/w32api
> > -idirafter ../../include/w32api
> 
> If I crate a link /usr/include -> /include then the warning / error is not
> produced.  Since I don't think /include is supposed to exist on Cygwin, it
> seems the compiler spec is wrong?

It looks like this is a misbehaviour of gcc 4.7.3.  There are
practically always non-existant default include dirs, not only on
Cygwin.  If you try the same -Wmissing-include-dirs with gcc 4.8.1 on
x86_64 Cygwin, there won't be such a warning.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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