[LLVMdev] [cfe-dev] RFC: Upcoming Build System Changes

[Jean-Daniel Dupas]

Le 28 oct. 2011 à 15:40, Christian Parpart a écrit :

> I wouldn't say that. I know quite a few systems here around that even try to avoid python where possible. but cmake however, as a build system, is welcomed by all of us (working as a sysop in a unix environment).
> 
> I'd also (as a non-llvm-dev but llvm-userdev) vote for NOT reinventing the wheel but to use the tool the fits you the best, personally that's even cmake, too. it has a well list of great backing companies / projects and is still improving well, e.g. Qt planned (I do not know how up-to-date this info is) improve it in a way to make it more suitable for IDEs, however, from the sysop point of view, it's much more a pleasure to work with cmake than with autotools, and when you introduce (yet) another new build system, it would be just a headache :)

If I understand the proposal correctly, from a Jan Doe (llvm-user) point of view, you will just continue to use cmake. The only difference will be that cmake will call a python script to generate a bunch of files used by cmake  or make.

That said, wouldn't it be possible to not require this script to be run for the users, but simply add resulting files in the repository (just like many project do not require you run autoconf, and just distribute the generated configure script).

Like that, the python dependency will be required only if you change the module description files, and not for casual developers and users who just plan to recompile llvm.

> Best regards,
> Christian Parpart.
> 
> 
> On Fri, Oct 28, 2011 at 12:55 PM, Csaba Raduly <rcsaba at gmail.com> wrote:
> On Fri, Oct 28, 2011 at 3:34 AM, Chandler Carruth  wrote:
> > I have a very high level comment, and you may be able to directly shed light
> > on it before I dig into a lot more detail.
> > Why not simply standardize on CMake?
> 
> That would establish a hard dependency on CMake. Not every system has
> CMake whereas most systems do have Python by default (on the machines
> I use daily, Python has a 5-1 lead).
> See also David Chisnall's mail about Perl > Python.
> 
> Csaba
> --
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-- Jean-Daniel




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