[llvm-dev] llvmbuildectomy

[Serge Guelton via llvm-dev]

Hi Folks,

An llvm-build chirurgal extraction was launched a few hours ago[1] and
after an emergency action
for the ocaml bindings [2], I'm glad to announce that the transplant looks
in good shape!

Although we did some intensive testing, given the size of the diff

```console
$  git diff 9218ff50^..9218ff50 --shortstat
 422 files changed, 1691 insertions(+), 7505 deletions(-)
```
side effects are *not* unexpected, please let me know through [1] if you
spot anything unusual
related to LLVM components.

-- Serge

[1] https://reviews.llvm.org/D90848
[2] https://reviews.llvm.org/rG95537f450814c378fcb9d446dadcabc1385a5903

On Fri, Oct 9, 2020 at 6:51 PM Serge Guelton <sguelton at redhat.com> wrote:

> Hi Folks,
>
> Although LLVM now relies on cmake for its build configuration, it still
> calls an
> external Python script, namely llvm-build, to manage component dependecies,
> activation or deactivation of target componenents and generating
> description for
> llvm-config.
>
> This system is documented in
> http://llvm.org/docs/CommandGuide/llvm-build.html
> and https://llvm.org/docs/LLVMBuild.html.
>
> Several features of the system are either undocumented, obsolete or
> redundant
> with the cmake description (sometimes all at once!). For instance the
> LLVMBuild.txt under tools/ don't seem relevant anymore. And the
> –write-make-fragment for Makefile comptibility no longer makes sense.
>
> The whole thing also adds a dependency on Python in our core Build system
> (leaving
> aside documentation, that is).
>
> I have a patch that seems to work for the default configuration, submited
> here:
>
>     https://reviews.llvm.org/D89142
>
> It's basically a conversion of the Python script to plain cmake, with some
> (unused (?)) feature removed.
>
> It still require proper documentation, some cleaning and official doc
> update,
> but now that the approach is somehow validated technically, I'd like to
> know if
> people interact with llvm-build at all, have expectations etc, other than
> « LLVM
> builds ».
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20201113/914a863d/attachment-0001.html>