Chances for llvm / clang update?

Chances for llvm / clang update?

[Andreas Heckel]

Hi,

Is there a chance for an "official" update of clang / llvm. Currently I see v8 here on Cygwin while llvm is now at v12.

I had tried to build v12 in Cygwin by simply running along the instructions on the llvm page. But I failed at a number of options / packages in the past and only got clang and a few tools like clang-format to run under Cygwin. I apologise, but I really have no clue about building anything properly for Cygwin (yet).

Cheers,
Andreas

Re: Chances for llvm / clang update?

[Andrey Repin]

Greetings, Andreas Heckel!

> Is there a chance for an "official" update of clang / llvm. Currently I see
> v8 here on Cygwin while llvm is now at v12.

> I had tried to build v12 in Cygwin by simply running along the instructions
> on the llvm page. But I failed at a number of options / packages in the past
> and only got clang and a few tools like clang-format to run under Cygwin. I
> apologise, but I really have no clue about building anything properly for Cygwin (yet).

https://cygwin.com/packaging-contributors-guide.html is a good start, I think.


-- 
With best regards,
Andrey Repin
Thursday, April 22, 2021 12:35:54

Sorry for my terrible english...

Re: Chances for llvm / clang update?

[Marco Atzeri]

On 22.04.2021 10:31, Andreas Heckel via Cygwin wrote:
> Hi,
> 
> Is there a chance for an "official" update of clang / llvm. Currently I see v8 here on Cygwin while llvm is now at v12.
> 
> I had tried to build v12 in Cygwin by simply running along the instructions on the llvm page. But I failed at a number of options / packages in the past and only got clang and a few tools like clang-format to run under Cygwin. I apologise, but I really have no clue about building anything properly for Cygwin (yet).
> 
> Cheers,
> Andreas
> 

Hi Andreas,

have you started looking to the current cygwin source package and 
patches for hints and guidance ?

Unfortunately the package is without maintainer, and volunteers to take 
over are lacking.

https://cygwin.com/packages/summary/clang.html

Motivation/Need is a good starting point for becoming a maintainer,
feel free to post here your issues in trying to compile it;
maybe we can help you

Marco

RE: Chances for llvm / clang update?

[Andreas Heckel]

> From: Andrey Repin
> Sent: Thursday, April 22, 2021 11:47 AM
> 
> https://cygwin.com/packaging-contributors-guide.html is a good
> start, I think.

See below...

> From: Marco Atzeri
> Sent: Thursday, April 22, 2021 1:11 PM
> 
> have you started looking to the current cygwin source package
> and
> patches for hints and guidance ?

Thank you for your kind hints. :)

> Unfortunately the package is without maintainer, and volunteers
> to take
> over are lacking.

I was not sure on this part. Good to know, for now I was not expecting anything, just being curious. But since I am interested, I will spent some time to look into it at some point. Although I feel not very confident achieving much with my limited knowledge. I will get back to you, once I have concrete questions I can articulate.

Cheers,
Andreas

Re: Chances for llvm / clang update?

[Brian Inglis]

On 2021-04-22 02:31, Andreas Heckel via Cygwin wrote:
> Is there a chance for an "official" update of clang / llvm. Currently I 
see v8 here on Cygwin while llvm is now at v12.
> 
> I had tried to build v12 in Cygwin by simply running along the instructions on the llvm page. But I failed at a number of options / packages in the past and only got clang and a few tools like clang-format to run under Cygwin. I apologise, but I really have no clue about building anything properly for Cygwin (yet).

Install the latest llvm and clang *source* packages; and

binary packages: cygport, which pulls in all the usual tools, but also add 
cmake, gnupg2, ninja, cygwin-devel, libc++-devel, libc++abi-devel, 
libedit-devel, libffi-devel, libllvm-devel, libncurses-devel, libpolly-devel, 
libunwind-devel, libxml2-devel, zlib-devel, python3-devel, python3-recommonmark, 
python3-setuptools, and python3-sphinx;

change to the llvm source directory containing the llvm.cygport file;

edit llvm.cygport, and bump the major version 1 at a time, e.g. 9.0.1, 10.0.1 
11.1.0, 12.0.0, including libllvm{9,10,11,12}, libpolly{9,10,11,12}, and save;

then run:

	$ cygport llvm.cygport download all check

Pay attention to:

any warning or error messages about required packages missing, some of which may 
be lib...-devel, which you have to install before retrying the build; and

build errors, which you have to resolve.

After a successful build, you will have binary and source tar and hint files 
under llvm-#-1.*86*/dist/llvm/ which you may install on your system using:

	$ tar -xv -C / -f llvm-#-1.*86*/dist/llvm/llvm-#-1.tar.xz

similarly for prerequisite dependencies and corequisite package tars under:

	$ ls llvm-#-1.*86*/dist/llvm/{,*/}*-#-1.tar.xz

as packages are built under a virtual root directory, which you can see under 
llvm-#-1.*86*/inst/...

Then repeat the process for clang using each recently built and installed llvm.

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
[Data in binary units and prefixes, physical quantities in SI.]

Re: Chances for llvm / clang update?

[Brian Inglis]

On 2021-04-22 09:08, Brian Inglis wrote:
> On 2021-04-22 02:31, Andreas Heckel via Cygwin wrote:
>> Is there a chance for an "official" update of clang / llvm. Currently I 
> see v8 here on Cygwin while llvm is now at v12.
>>
>> I had tried to build v12 in Cygwin by simply running along the instructions on 
>> the llvm page. But I failed at a number of options / packages in the past and 
>> only got clang and a few tools like clang-format to run under Cygwin. I 
>> apologise, but I really have no clue about building anything properly for 
>> Cygwin (yet).
> 
> Install the latest llvm and clang *source* packages; and
> 
> binary packages: cygport, which pulls in all the usual tools, but also add 
> cmake, gnupg2, ninja, cygwin-devel, libc++-devel, libc++abi-devel, 
> libedit-devel, libffi-devel, libllvm-devel, libncurses-devel, libpolly-devel, 
> libunwind-devel, libxml2-devel, zlib-devel, python3-devel, python3-recommonmark, 
> python3-setuptools, and python3-sphinx;
> 
> change to the llvm source directory containing the llvm.cygport file;
> 
> edit llvm.cygport, and bump the major version 1 at a time, e.g. 9.0.1, 10.0.1 
> 11.1.0, 12.0.0, including libllvm{9,10,11,12}, libpolly{9,10,11,12}, and save;
> 
> then run:
> 
>      $ cygport llvm.cygport download all check
> 
> Pay attention to:
> 
> any warning or error messages about required packages missing, some of which may 
> be lib...-devel, which you have to install before retrying the build; and
> 
> build errors, which you have to resolve.
> 
> After a successful build, you will have binary and source tar and hint files 
> under llvm-#-1.*86*/dist/llvm/ which you may install on your system using:
> 
>      $ tar -xv -C / -f llvm-#-1.*86*/dist/llvm/llvm-#-1.tar.xz
> 
> similarly for prerequisite dependencies and corequisite package tars under:
> 
>      $ ls llvm-#-1.*86*/dist/llvm/{,*/}*-#-1.tar.xz
> 
> as packages are built under a virtual root directory, which you can see under 
> llvm-#-1.*86*/inst/...
> 
> Then repeat the process for clang source updates using each recently built and installed llvm.

You can also browse the cygport and patch files required at:

	https://cygwin.com/git-cygwin-packages/?p=git/cygwin-packages/llvm.git
	https://cygwin.com/git-cygwin-packages/?p=git/cygwin-packages/clang.git

and you can git clone those projects from the listed URLs as a basis for 
building and upgrading: llvm cygport has already been updated there for 9.0.1.

Once you have installed cygport you can browse the local docs using:

	$ cygstart /usr/share/doc/cygport/html/manual/index.html

for more information on what's going on.

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
[Data in binary units and prefixes, physical quantities in SI.]

RE: Chances for llvm / clang update?

[Andreas Heckel]

Thank you so much for your support. This really takes the edge off the first steps! I instantly started setting up a test environment and also trying to get familiar.

It will still be a steep learning curve for me anyway, but you are very motivating.

Cheers,
Andreas