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Re: [libvirt] [PATCH] log_manager: Include configmake.h last

From: Eric Blake
Subject: Re: [libvirt] [PATCH] log_manager: Include configmake.h last
Date: Tue, 1 Dec 2015 11:36:15 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0

[adding bug-gnulib]

On 12/01/2015 10:03 AM, Martin Kletzander wrote:
> On Tue, Dec 01, 2015 at 05:08:53PM +0100, Michal Privoznik wrote:
>> The problem is that in some mingw header DATADIR is used but
>> gnulib defines it too. This leads to the following compile error:
>>  CC       locking/libvirt_driver_la-lock_manager.lo
>> In file included from
>> /usr/i686-w64-mingw32/sys-root/mingw/include/objbase.h:66:0,
>>                 from
>> /usr/i686-w64-mingw32/sys-root/mingw/include/ole2.h:17,
>>                 from
>> /usr/i686-w64-mingw32/sys-root/mingw/include/wtypes.h:12,
>>                 from
>> /usr/i686-w64-mingw32/sys-root/mingw/include/winscard.h:10,
>>                 from
>> /usr/i686-w64-mingw32/sys-root/mingw/include/windows.h:97,
>>                 from
>> /usr/i686-w64-mingw32/sys-root/mingw/include/winsock2.h:23,
>>                 from ../gnulib/lib/unistd.h:48,
>>                 from ../../src/util/virutil.h:29,
>>                 from ../../src/logging/log_manager.c:30:
>> /usr/i686-w64-mingw32/sys-root/mingw/include/objidl.h:12275:2: error:
>> expected identifier or '(' before string constant
>>  ^
>> Makefile:7888: recipe for target
>> 'logging/libvirt_driver_la-log_manager.lo' failed
>> The fix is to include configmake.h at the end of includes.
> Same issue that I was fixing with commit 976abdf66975, I see.  I wonder
> if there's anything we could do to fix this for good, but that's a
> thought for another day.

I wonder if gnulib should fix configmake.h to first include <winsock2.h>
when that header exists. It will pollute the namespace more heavily, but
would at least make configmake.h always work when included first, and
make compile errors due to windows namespace pollution easier to find
reliably and not just because a project randomly changes its own include

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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