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

[Hans Wennborg via llvm-dev]

(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?
>
> If so, I'll stop building the win snapshots in xp-compat mode and add
> a note to the 3.8 release notes.
>
>  - 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.