[LLVMdev] RFC: Timeline for deprecating the autoconf build system?

[Tom Stellard]

On Sat, Nov 01, 2014 at 02:26:08AM +0200, Pasi Parviainen wrote:
> On 1.11.2014 0:08, Tom Stellard wrote:
> >Hi,
> >
> >I would like to propose deprecating the autoconf build system at some
> >point in the future.  Maintaining two build systems is a hassle not
> >only for this project, but also for other projects that use LLVM
> >and have to deal with the slight differences in output between the two
> >build systems.
> 
> Because of these differences between build systems, I decided to
> start my personal project recently to bring up each build system to
> equal grounds for a platform which I care (which is FreeBSD).
> Motivation for this has been to have identical test results (and
> builds) from each other, in the case autoconf build system is
> retired.
> 
> >It seems like most people are using CMake at this point, so my questions
> >to the community are:
> >
> >- Is there any technical reason why the remaining autoconf users can't switch
> >   to CMake?
> 
> At least better job could be done for canonicalization of
> architectures within cmake configurations. For example at the moment
> some LLVM tests does not run with cmake builds for x86_64 FreeBSD,
> since it identifies itself as "amd64" for cmake, which cascades down
> to lit testing infrastructure. That's an easy example what I have
> faced at least so far.
> 

Hi,

I've filed a bug for this: http://www.llvm.org/bugs/show_bug.cgi?id=21559
Feel free to add additional information if needed.

If your run into any more issues, it would be great if you could file bugs
and mark them as blocking the meta cmake bug:  15732 so we can track it.

Thanks,
Tom

> Pasi
> 
> >For example, I personally use automake, and the only reason I don't
> >use CMake is because it doesn't produce a single shared object
> >(e.g. libLLVM-3.6.0svn.so).
> >
> >- What is a reasonable timeframe to allow the remaining autoconf users
> >   a chance to migrate to CMake?
> >
> >Thanks,
> >Tom
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> >
>