From: Csaba Raduly <rcsaba@gmail.com>
To: cygwin list <cygwin@cygwin.com>
Subject: Re: configure fails on checking ino_t
Date: Thu, 08 Jun 2017 08:27:00 -0000 [thread overview]
Message-ID: <CAEhDDbD_wXqPAJRzbJYSjSWkPqA8Rv6se7N6QnK_OcWuzUHRZQ@mail.gmail.com> (raw)
In-Reply-To: <6b85944b-bb04-0a6a-2a7d-1dcc7bc2fc1f@redhat.com>
On Thu, Jun 8, 2017 at 12:19 AM, Eric Blake wrote:
> On 06/07/2017 05:11 PM, Lloyd Wood via cygwin wrote:
>> Aha! just slightly later in config.log:
>>
>> configure:17957: checking for ino_t
>> configure:17957: gcc -c -g -O2 conftest.c >&5
>> configure:17957: $? = 0
>> configure:17957: gcc -c -g -O2 conftest.c >&5
>> conftest.c: In function 'main':
>> conftest.c:94:20: error: expected expression before ')' token
>> if (sizeof ((ino_t)))
>> ^
>
> This _particular_ failure is expected (you aren't showing enough of the
> config.log output). Remember, to determine if something is a type vs.
> an expression, autoconf performs TWO compilation tests, and relies on
> the fact that sizeof(expr) and sizeof((expr)) both compile, but
> sizeof(type) compiles while sizeof((type)) must fail. The back-to-back
> compilation is necessary to ensure that something being probed for is a
> type name rather than an arbitray expression.
>
> So just because _some_ tests fail (as expected) does not mean that this
> particular failure is where configure is messing up.
Yes, I saw this in my successful config.log (and was a bit puzzled).
Lloyd, you need to look further down in config.log, because "checking
for sizeof(ino_t)" - the one that failed for you - is after "checking
for ino_t".
Csaba
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next prev parent reply other threads:[~2017-06-08 8:27 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <310357481.6222896.1496816466443.ref@mail.yahoo.com>
2017-06-07 6:21 ` Lloyd Wood via cygwin
2017-06-07 9:35 ` Corinna Vinschen
2017-06-07 19:10 ` Csaba Raduly
2017-06-07 20:37 ` Lloyd Wood via cygwin
2017-06-07 22:11 ` Lloyd Wood via cygwin
2017-06-07 22:19 ` Eric Blake
2017-06-08 8:27 ` Csaba Raduly [this message]
2017-06-08 2:44 ` Brian Inglis
2017-06-09 20:38 ` Ken Brown
2017-06-09 23:22 ` Lloyd Wood via cygwin
2017-06-10 1:53 ` Ken Brown
2017-06-11 0:22 ` Lloyd Wood via cygwin
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