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Date: Fri, 17 Feb 2012 12:10:43 +0900
Message-ID: <CAPYQg31Cw3spkarEf8dTH1x-TkkjLdjECmupZEpTyvNF31W=Cg@mail.gmail.com>
Subject: Re: porting problem triggered by gcc include search order
From: KIMURA Masaru <hiyuh DOT root AT gmail DOT com>
To: cygwin AT cygwin DOT com
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Hi,

2012/2/16 marco atzeri <marco DOT atzeri AT gmail DOT com>:
> rename local signal.h is effective.
>
> I guess that -I. is influencing the inclusion order with unexpected
> results.

thanks.
and I checked gcc include order on my linux env.
renaming works fine but it's awkward to me.

after more investigation, I realized that:

 * on cygwin env
    1. src/rt/slave.c is coded to #include <poll.h>
    2. gcc picks /usr/include/poll.h
    3. /usr/include/poll.h is coded to #include <sys/poll.h>
    4. gcc picks /usr/include/sys/poll.h
    5. /usr/include/sys/poll.h is coded to #include <signal.h>
    6. gcc picks src/rt/signal.h, not /usr/include/signal.h b/c -I.

 * on linux box
    1. src/rt/slave.c is coded to #include <poll.h>
    2. gcc picks /usr/include/poll.h
    3. /usr/include/poll.h is coded to #include <sys/poll.h>
    4. gcc picks /usr/include/sys/poll.h
    5. /usr/include/sys/poll.h is not coded to #include <signal.h>
    6. gcc doesn'y picks src/rt/signal.h, b/c there is no #include
<signal.h> even if w/ -I.

and I got one of google result:

 http://www.mingw.org/wiki/IncludePathHOWTO

maybe, this can be fixed in nvc itself and not so cygwin-related.
sorry for noise.

Peace,

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