Re: Please try out clang-cl and lld-link on Windows

[Jean-Yves Avenard]

Thank you David for this awesome work...


8:26.77 Your build was successful!

on windows !!

Who would have known we would ever get there...

(I had to uninstall my local install of LLVM nightly, run ./mach bootstrap
again.. The wiki should be amended with this, it gives confusing results
otherwie)

On Tue, Mar 13, 2018 at 3:31 PM, David Major  wrote:

> Link xul.dll in 20 seconds with this one weird trick!
>
>
> Hi everyone,
>
> clang-cl builds of Firefox have come a long way, from being a hobby
> project of a few developers to running static analysis in CI for more than
> a year now. The tools are in really good shape and should be ready for
> broader use within Mozilla at this point.
>
> Bug 1443590 is looking into what it would take to ship official builds
> with clang-cl and lld-link, but in the meantime it's possible to do local
> builds already. I'd like to invite people who develop on Windows to give it
> a try.
>
> *** Reasons to use clang-cl and lld-link locally ***
>
> - Speed! lld is known for being very fast. I'm serious about 20-second
> libxuls. That's a non-incremental link, with identical code folding
> enabled. For comparison, MSVC takes me over two minutes.
>
> - Speed again! clang-cl will integrate with upcoming sccache/icecream work.
>
> - Much clearer and more actionable error messages than MSVC
>
> - Make your own ASan and static analysis builds (the latter need an LLVM
> before r318304, see bug 1427808)
>
> - Help ship Firefox with clang-cl by getting more eyes and machines on
> these tools
>
> *** Reasons not to use clang-cl and lld-link locally (yet) ***
>
> - You are testing codegen-level fixes or optimizations and need to see the
> exact bits that will be going out to users
>
> - lld-link currently doesn’t support incremental linking -- but with full
> linking being so fast, this might not matter
>
> - You do artifact builds that don't use a local compiler
>
> *** How do I get started? ***
>
> https://developer.mozilla.org/en-US/docs/Mozilla/Developer_
> guide/Build_Instructions/Building_Firefox_on_Windows_with_clang-cl
>
> A number of build system changes have landed that make these builds much
> easier than before. For example you no longer need to use old versions of
> MozillaBuild.
>
> Note that clang-cl builds still depend on an MSVC installation for
> headers, libraries, and auxiliary build tools, so don't go uninstalling
> your Visual Studio just yet.
>
> If you run into any problems, please stop by #build or visit the shiny new
> Firefox Build System product in Bugzilla (formerly Core :: Build Config).
>
> Thanks!
>
>
> ___
> firefox-dev mailing list
> firefox-...@mozilla.org
> https://mail.mozilla.org/listinfo/firefox-dev
>
>
___
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Re: Please try out clang-cl and lld-link on Windows

[David Major]

The SDK requirement is due to some nonstandard code in the latest Microsoft
headers that clang rejects:
https://developercommunity.visualstudio.com/content/problem/132223/clang-cant-compile-wrlimplementsh.html

For now the easiest way forward is to go into Visual Studio Installer, add
"Windows 10 SDK (10.0.15063.0) for Desktop C++ [x86 and x64]" and remove
16299.

On Wed, Mar 14, 2018 at 6:20 AM, Marco Bonardo  wrote:

> It sounds cool and I'd really love to try, but:
> "ERROR: Found SDK version 10.0.16299.0 but clang-cl builds currently
> don't work with SDK version 10.0.16299.0 and later..."
>
> I know that I can set WINDOWSSDKDIR, but I'm not willing to mess too
> much with the env. Is there a bug tracking the update to the latest
> sdk, or automatically use the right one, that I can follow?
>
>
> On Tue, Mar 13, 2018 at 3:31 PM, David Major  wrote:
> > Link xul.dll in 20 seconds with this one weird trick!
> >
> >
> >
> > Hi everyone,
> >
> >
> > clang-cl builds of Firefox have come a long way, from being a hobby
> project
> > of a few developers to running static analysis in CI for more than a year
> > now. The tools are in really good shape and should be ready for broader
> use
> > within Mozilla at this point.
> >
> >
> > Bug 1443590 is looking into what it would take to ship official builds
> with
> > clang-cl and lld-link, but in the meantime it's possible to do local
> builds
> > already. I'd like to invite people who develop on Windows to give it a
> try.
> >
> >
> > *** Reasons to use clang-cl and lld-link locally ***
> >
> >
> > - Speed! lld is known for being very fast. I'm serious about 20-second
> > libxuls. That's a non-incremental link, with identical code folding
> enabled.
> > For comparison, MSVC takes me over two minutes.
> >
> > - Speed again! clang-cl will integrate with upcoming sccache/icecream
> work.
> >
> > - Much clearer and more actionable error messages than MSVC
> >
> > - Make your own ASan and static analysis builds (the latter need an LLVM
> > before r318304, see bug 1427808)
> >
> > - Help ship Firefox with clang-cl by getting more eyes and machines on
> these
> > tools
> >
> >
> > *** Reasons not to use clang-cl and lld-link locally (yet) ***
> >
> >
> > - You are testing codegen-level fixes or optimizations and need to see
> the
> > exact bits that will be going out to users
> >
> > - lld-link currently doesn’t support incremental linking -- but with full
> > linking being so fast, this might not matter
> >
> > - You do artifact builds that don't use a local compiler
> >
> >
> > *** How do I get started? ***
> >
> >
> > https://developer.mozilla.org/en-US/docs/Mozilla/Developer_
> guide/Build_Instructions/Building_Firefox_on_Windows_with_clang-cl
> >
> >
> > A number of build system changes have landed that make these builds much
> > easier than before. For example you no longer need to use old versions of
> > MozillaBuild.
> >
> >
> > Note that clang-cl builds still depend on an MSVC installation for
> headers,
> > libraries, and auxiliary build tools, so don't go uninstalling your
> Visual
> > Studio just yet.
> >
> >
> > If you run into any problems, please stop by #build or visit the shiny
> new
> > Firefox Build System product in Bugzilla (formerly Core :: Build Config).
> >
> >
> > Thanks!
> >
> >
> >
> > ___
> > firefox-dev mailing list
> > firefox-...@mozilla.org
> > https://mail.mozilla.org/listinfo/firefox-dev
> >
>
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Re: Please try out clang-cl and lld-link on Windows

[Marco Bonardo]

It sounds cool and I'd really love to try, but:
"ERROR: Found SDK version 10.0.16299.0 but clang-cl builds currently
don't work with SDK version 10.0.16299.0 and later..."

I know that I can set WINDOWSSDKDIR, but I'm not willing to mess too
much with the env. Is there a bug tracking the update to the latest
sdk, or automatically use the right one, that I can follow?


On Tue, Mar 13, 2018 at 3:31 PM, David Major  wrote:
> Link xul.dll in 20 seconds with this one weird trick!
>
>
>
> Hi everyone,
>
>
> clang-cl builds of Firefox have come a long way, from being a hobby project
> of a few developers to running static analysis in CI for more than a year
> now. The tools are in really good shape and should be ready for broader use
> within Mozilla at this point.
>
>
> Bug 1443590 is looking into what it would take to ship official builds with
> clang-cl and lld-link, but in the meantime it's possible to do local builds
> already. I'd like to invite people who develop on Windows to give it a try.
>
>
> *** Reasons to use clang-cl and lld-link locally ***
>
>
> - Speed! lld is known for being very fast. I'm serious about 20-second
> libxuls. That's a non-incremental link, with identical code folding enabled.
> For comparison, MSVC takes me over two minutes.
>
> - Speed again! clang-cl will integrate with upcoming sccache/icecream work.
>
> - Much clearer and more actionable error messages than MSVC
>
> - Make your own ASan and static analysis builds (the latter need an LLVM
> before r318304, see bug 1427808)
>
> - Help ship Firefox with clang-cl by getting more eyes and machines on these
> tools
>
>
> *** Reasons not to use clang-cl and lld-link locally (yet) ***
>
>
> - You are testing codegen-level fixes or optimizations and need to see the
> exact bits that will be going out to users
>
> - lld-link currently doesn’t support incremental linking -- but with full
> linking being so fast, this might not matter
>
> - You do artifact builds that don't use a local compiler
>
>
> *** How do I get started? ***
>
>
> https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Build_Instructions/Building_Firefox_on_Windows_with_clang-cl
>
>
> A number of build system changes have landed that make these builds much
> easier than before. For example you no longer need to use old versions of
> MozillaBuild.
>
>
> Note that clang-cl builds still depend on an MSVC installation for headers,
> libraries, and auxiliary build tools, so don't go uninstalling your Visual
> Studio just yet.
>
>
> If you run into any problems, please stop by #build or visit the shiny new
> Firefox Build System product in Bugzilla (formerly Core :: Build Config).
>
>
> Thanks!
>
>
>
> ___
> firefox-dev mailing list
> firefox-...@mozilla.org
> https://mail.mozilla.org/listinfo/firefox-dev
>
___
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Re: Please try out clang-cl and lld-link on Windows

[Bobby Holley]

It's really exciting to see such rapid progress being made here. Thanks
David!

On Tue, Mar 13, 2018 at 7:31 AM, David Major  wrote:

> Link xul.dll in 20 seconds with this one weird trick!
>
>
> Hi everyone,
>
> clang-cl builds of Firefox have come a long way, from being a hobby project
> of a few developers to running static analysis in CI for more than a year
> now. The tools are in really good shape and should be ready for broader use
> within Mozilla at this point.
>
> Bug 1443590 is looking into what it would take to ship official builds with
> clang-cl and lld-link, but in the meantime it's possible to do local builds
> already. I'd like to invite people who develop on Windows to give it a try.
>
> *** Reasons to use clang-cl and lld-link locally ***
>
> - Speed! lld is known for being very fast. I'm serious about 20-second
> libxuls. That's a non-incremental link, with identical code folding
> enabled. For comparison, MSVC takes me over two minutes.
>
> - Speed again! clang-cl will integrate with upcoming sccache/icecream work.
>
> - Much clearer and more actionable error messages than MSVC
>
> - Make your own ASan and static analysis builds (the latter need an LLVM
> before r318304, see bug 1427808)
>
> - Help ship Firefox with clang-cl by getting more eyes and machines on
> these tools
>
> *** Reasons not to use clang-cl and lld-link locally (yet) ***
>
> - You are testing codegen-level fixes or optimizations and need to see the
> exact bits that will be going out to users
>
> - lld-link currently doesn’t support incremental linking -- but with full
> linking being so fast, this might not matter
>
> - You do artifact builds that don't use a local compiler
>
> *** How do I get started? ***
>
> https://developer.mozilla.org/en-US/docs/Mozilla/Developer_
> guide/Build_Instructions/Building_Firefox_on_Windows_with_clang-cl
>
> A number of build system changes have landed that make these builds much
> easier than before. For example you no longer need to use old versions of
> MozillaBuild.
>
> Note that clang-cl builds still depend on an MSVC installation for headers,
> libraries, and auxiliary build tools, so don't go uninstalling your Visual
> Studio just yet.
>
> If you run into any problems, please stop by #build or visit the shiny new
> Firefox Build System product in Bugzilla (formerly Core :: Build Config).
>
> Thanks!
> ___
> dev-platform mailing list
> dev-platform@lists.mozilla.org
> https://lists.mozilla.org/listinfo/dev-platform
>
___
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Please try out clang-cl and lld-link on Windows

[David Major]

Link xul.dll in 20 seconds with this one weird trick!


Hi everyone,

clang-cl builds of Firefox have come a long way, from being a hobby project
of a few developers to running static analysis in CI for more than a year
now. The tools are in really good shape and should be ready for broader use
within Mozilla at this point.

Bug 1443590 is looking into what it would take to ship official builds with
clang-cl and lld-link, but in the meantime it's possible to do local builds
already. I'd like to invite people who develop on Windows to give it a try.

*** Reasons to use clang-cl and lld-link locally ***

- Speed! lld is known for being very fast. I'm serious about 20-second
libxuls. That's a non-incremental link, with identical code folding
enabled. For comparison, MSVC takes me over two minutes.

- Speed again! clang-cl will integrate with upcoming sccache/icecream work.

- Much clearer and more actionable error messages than MSVC

- Make your own ASan and static analysis builds (the latter need an LLVM
before r318304, see bug 1427808)

- Help ship Firefox with clang-cl by getting more eyes and machines on
these tools

*** Reasons not to use clang-cl and lld-link locally (yet) ***

- You are testing codegen-level fixes or optimizations and need to see the
exact bits that will be going out to users

- lld-link currently doesn’t support incremental linking -- but with full
linking being so fast, this might not matter

- You do artifact builds that don't use a local compiler

*** How do I get started? ***

https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Build_Instructions/Building_Firefox_on_Windows_with_clang-cl

A number of build system changes have landed that make these builds much
easier than before. For example you no longer need to use old versions of
MozillaBuild.

Note that clang-cl builds still depend on an MSVC installation for headers,
libraries, and auxiliary build tools, so don't go uninstalling your Visual
Studio just yet.

If you run into any problems, please stop by #build or visit the shiny new
Firefox Build System product in Bugzilla (formerly Core :: Build Config).

Thanks!
___
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