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

[Chris Bieneman via llvm-dev]

Tobias,

My hope is that now is the time when owners of bots using autoconf will be migrating them to CMake, however I don’t expect that all the autoconf bots need to be migrated. My strong suspicion is that many of the autoconf bots that are remaining have CMake-equivolent bots already, so they can just be deactivated.

-Chris


> On Jan 14, 2016, at 6:06 AM, Tobias Grosser <tobias at grosser.es> wrote:
> 
> On 01/12/2016 06:35 PM, Chris Bieneman via llvm-dev wrote:
>> Now that 3.8 is imminently branching with the newly deprecated autoconf I think it is time to propose a process and timeline for removing autoconf support from trunk.
>> 
>> At this point I believe there should be no users of autoconf for Clang and LLVM that are not supported by CMake, so I would like to propose dropping autoconf support from the cfe and llvm repositories on January 26th (two weeks from today). I believe this gives sufficient time for users to migrate any remaining systems off autoconf. If this timeline doesn’t work for you, please speak up.
>> 
>> There are still some problematic use cases for building the compiler-rt builtins. Specifically bootstrapping cross-compilers is fragile and in some cases entirely unworkable in CMake. To this end I’m not proposing a full removal of the compiler-rt makefiles at this time. What I would like to propose is that on February 2nd we remove autoconf support for all sanitizer runtimes from compiler-rt.
>> 
>> We will not be removing the makefile build system from the test-suite project. The CMake build system there is very new, and still nowhere near feature complete.
>> 
>> For other projects (libcxx, libcxxabi, libunwind…) I’ve not made significant contributions to these projects, so I’d like to defer to more active contributors on those projects, but I am unaware of any blocking issues.
>> 
>> Questions, comments, concerns, panic, fire, brimstone?
> 
> Hi Chris,
> 
> thanks for pushing this forward. I am very much in favor of dropping configure.
> 
> 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?
> 
> Best,
> Tobias

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