llvm dev - Jan 2016 - [RFC] Removing autoconf from trunk

The purpose of this thread was to propose removing configure on January 26th.
There have been no objections, so I’m assuming that timeline is acceptable.

-Chris
> On Jan 15, 2016, at 5:54 AM, Krzysztof Parzyszek via llvm-dev <llvm-dev
at lists.llvm.org> wrote:
> 
> On 1/15/2016 5:05 AM, Daniel Sanders via llvm-dev wrote:
>>> One issue that I believe has not yet been addressed is to move our
>>> existing buildbots to cmake. Looking at the config/builders.py a
lot of
>>> them have already been moved, but there seem to still be a couple
that
>>> did not yet switch. Did anybody an analysis regarding which bots
still
>>> need to be updated?
>> 
>> We have one that's still on autoconf (llvm-linux-mips) but it
should be on cmake soon.
> 
> The two Hexagon bots (llvm-hexagon-elf and clang-hexagon-elf) are also
using configure at the moment.  When is the removal of configure planned to take
place?
> 
> -Krzysztof
> 
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On Fri, Jan 15, 2016 at 6:46 PM, Chris Bieneman via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> The purpose of this thread was to propose removing configure on January
26th.
> There have been no objections, so I’m assuming that timeline is acceptable.
I'm all for having a single system in place, but as I asked in a
different thread
this week, there's no --enable-bindings=none/auto/ocaml/go/... available
in the CMake scripts. My CMake knowledge is purely as a user, so
someone with more experience might want to recreate this.
There's -DLLVM_BINDINGS_LIST, though it doesn't do what one might
expect.

There's likely other ./configure switches as well that need porting to
CMake flags.

I've been happily build llvm via cmake -G Ninja otherwise.

> On Jan 15, 2016, at 10:02 AM, Carsten Mattner <carstenmattner at
gmail.com> wrote:
> 
> On Fri, Jan 15, 2016 at 6:46 PM, Chris Bieneman via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
>> The purpose of this thread was to propose removing configure on January
26th.
>> There have been no objections, so I’m assuming that timeline is
acceptable.
> 
> I'm all for having a single system in place, but as I asked in a
> different thread
> this week, there's no --enable-bindings=none/auto/ocaml/go/...
available
> in the CMake scripts. My CMake knowledge is purely as a user, so
> someone with more experience might want to recreate this.
> There's -DLLVM_BINDINGS_LIST, though it doesn't do what one might
> expect.
If you wanted this to block removing autoconf, the time to have brought it up
was probably BEFORE we deprecated autoconf. Sorry if this comes off a little
pissy, but there has been a lot of communication about this. It shouldn’t be a
surprise at this point.
> 
> There's likely other ./configure switches as well that need porting to
> CMake flags.
See above. We’ve been actively fixing issues that people report to us for well
over a year with the goal of removing autoconf. Back in November (r252520) we
officially deprecated autoconf and since then have been logging a message at the
end of the configure script telling people to switch to CMake.

If there are other flags that are required, we’ll fix them as they are reported,
but they will not be blocking the removal of autoconf.

For context see the following LLVM-dev threads (I’m sure I missed a few), which
detailed various aspects of the work over the last 14 months:
http://lists.llvm.org/pipermail/llvm-dev/2014-October/078352.html
http://lists.llvm.org/pipermail/llvm-dev/2015-February/081640.html
http://lists.llvm.org/pipermail/llvm-dev/2015-March/082966.html
<http://lists.llvm.org/pipermail/llvm-dev/2015-March/082966.html>
http://lists.llvm.org/pipermail/llvm-dev/2015-March/083337.html
http://lists.llvm.org/pipermail/llvm-dev/2015-May/086146.html
http://lists.llvm.org/pipermail/llvm-dev/2015-July/088750.html
<http://lists.llvm.org/pipermail/llvm-dev/2015-July/088750.html>
http://lists.llvm.org/pipermail/llvm-dev/2015-July/088751.html
http://lists.llvm.org/pipermail/llvm-dev/2015-October/090958.html
http://lists.llvm.org/pipermail/llvm-dev/2015-November/092150.html

-Chris
> 
> I've been happily build llvm via cmake -G Ninja otherwise.
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