[llvm-dev] [LLVMdev] RFC: Drop support running LLVM on Windows XP

Thu Oct 15 00:16:36 PDT 2015

Hi there,

Has the change been formalized in other form than 3.7 release notes?

I'm asking because I would like to use Windows Vista API in this
http://reviews.llvm.org/D13753 and following patches. It looks it is enough
to change the macro definition in WindowsSupport.h. Apparently, cmake does
not set _WIN32_WINNT globally.

- Paweł

On Mon, Oct 5, 2015 at 8:41 PM Hans Wennborg via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> On Mon, Oct 5, 2015 at 11:19 AM, Aaron Ballman <aaron at aaronballman.com>
> wrote:
> > On Mon, Oct 5, 2015 at 2:18 PM, Hans Wennborg via llvm-dev
> > <llvm-dev at lists.llvm.org> wrote:
> >> (cc'ing the new list address; sorry for the duplicate)
> >>
> >> On Mon, Oct 5, 2015 at 11:14 AM, Hans Wennborg <hans at chromium.org>
> wrote:
> >>> Did we conclude that we've dropped Win XP support now?
> >
> > I believe we have, yes.
>
> Release notes updated in r249332.
>
> Thanks,
> Hans
>
>
> >>> On Mon, Jul 13, 2015 at 3:26 PM, Reid Kleckner <rnk at google.com> wrote:
> >>>> Nobody objected to raising the bar, so I think we can go ahead and do
> this.
> >>>> Keeping the XP support until 3.7 ships seems reasonable as it's less
> >>>> disruptive.
> >>>>
> >>>> Should we consider bypassing Vista and jumping to 7 as the lowest
> supported
> >>>> Windows version as David suggested? I think we should document 7 as
> the
> >>>> recommended baseline. After we start using some of the newer APIs, we
> can
> >>>> see if users complain and evaluate the burden of maintaining Vista
> support
> >>>> at that time.
> >>>>
> >>>> On Mon, Jul 13, 2015 at 2:28 PM, Greg Bedwell <gregbedwell at gmail.com>
> wrote:
> >>>>>
> >>>>> Hi all,
> >>>>>
> >>>>> It looks like this conversation stalled.  I have a local patch that
> I'd
> >>>>> like to send upstream (automatically generating Windows crash dumps
> on
> >>>>> clang/LLVM crashes) that makes use of a Windows API function that
> requires
> >>>>> _WIN32_WINNT set to 0x0600 at minimum so I'd like to restart the
> >>>>> conversation!
> >>>>>
> >>>>> As there have so far been no objections that I've seen and we're
> branching
> >>>>> imminently, it feels like a perfect time to make this change as soon
> as the
> >>>>> release branch is taken, and adding a release note for 3.7 to the
> effect of
> >>>>> it being the final version supporting XP.  I don't think there's
> been a
> >>>>> clear conclusion on what we should raise it to though.
> >>>>>
> >>>>> Any thoughts on this?
> >>>>>
> >>>>> Thanks,
> >>>>> -Greg
> >>>>>
> >>>>>
> >>>>> On 31 October 2014 at 16:30, Robinson, Paul
> >>>>> <Paul_Robinson at playstation.sony.com> wrote:
> >>>>>>
> >>>>>> We formally support our toolchain only on Windows 7 onward, so it's
> okay
> >>>>>> with us.
> >>>>>>
> >>>>>> (Please make sure this goes in the release notes when you start
> doing
> >>>>>> something not supported in XP and/or Vista.)
> >>>>>>
> >>>>>> --paulr
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> From: llvmdev-bounces at cs.uiuc.edu [mailto:
> llvmdev-bounces at cs.uiuc.edu] On
> >>>>>> Behalf Of Jim Rowan
> >>>>>> Sent: Friday, October 31, 2014 1:05 PM
> >>>>>> To: Reid Kleckner
> >>>>>> Cc: LLVM Developers Mailing List
> >>>>>> Subject: Re: [LLVMdev] RFC: Drop support running LLVM on Windows XP
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> +1
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> On Oct 30, 2014, at 3:29 PM, Reid Kleckner wrote:
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> I'd like to raise our baseline Windows system requirements to Vista,
> >>>>>> dropping support for running LLVM on Windows XP. Microsoft dropped
> support
> >>>>>> for XP half a year ago in April 2014.
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Our current status is that we require VS 2012 to build LLVM, and VS
> 2012
> >>>>>> only runs on Vista+, but it has the ability produce binaries that
> run on XP.
> >>>>>> During the C++11-pocalypse, users expressed interest in keeping this
> >>>>>> working. I'm proposing that we drop support for this.
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Vista introduced a lot of handy system APIs that could significantly
> >>>>>> simplify LLVM's Support library. For example, I'd really like to
> use the
> >>>>>> blessed one-time initialization routines in this CL:
> >>>>>>
> >>>>>> http://reviews.llvm.org/D5922
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Vista also introduced a bunch of condition variable APIs that I
> know less
> >>>>>> about, but that's another reason we might want to raise our base
> requirement
> >>>>>> as people look into parallel LTO and codegen. It also seems likely
> that we
> >>>>>> will want to use some of the new C++11 library features that are
> only
> >>>>>> present in newer CRTs, which don't run on XP.
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> Please respond if you have any objections. If there are no strong
> >>>>>> objections, I think we can start using Vista+ APIs in a week or so.
> We can
> >>>>>> still change our minds and revert stuff before the release if users
> feel
> >>>>>> this is too short notice.
> >> _______________________________________________
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> >> llvm-dev at lists.llvm.org
> >> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
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