Re: VS 2015 support in src/tools/msvc

On Fri, Mar 25, 2016 at 9:09 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
> On Thu, Mar 24, 2016 at 1:07 PM, Petr Jelinek <petr(at)2ndquadrant(dot)com> wrote:
>> On 24/03/16 17:28, Robert Haas wrote:
>>> On Wed, Mar 23, 2016 at 3:17 AM, Michael Paquier
>>> <michael(dot)paquier(at)gmail(dot)com> wrote:
>>>>
>>>> - 0001 fixes the global declarations of TIMEZONE_GLOBAL and
>>>> TZNAME_GLOBAL to be WIN32-compliant. I got bitten by that in the ECPG
>>>> compilation.
>>>
>>> So this isn't going to break other Windows builds? I mean, if we've
>>> got the names for those symbols wrong, how is this working right now?
>>>
>>
>> We didn't older versions just defined the other variants as well, but the
>> _timezone and _tzname have been around since at least VS2003.
>
> I am unable to parse this sentence. Sorry.

Petr means that both _timezone and _tzname are objects defined in
Visual Studio since more or less its 2003 release
(https://msdn.microsoft.com/en-us/library/htb3tdkc%28v=vs.71%29.aspx).
The oldest version on the buildfarm is Visual Studio 2005, and I agree
with him that there is no need to worry about older versions than
VS2003. The issue is that VS2015 does *not* define timezone and tzname
(please note the prefix underscore missing in those variable names),
causing compilation failures. That's why I am suggesting such a change
in this patch: this will allow the code to compile on VS2015, and
that's compatible with VS2003~.
--
Michael