[llvm-dev] [RFC] Deprecating autoconf: Let's do it!

Brooks Davis via llvm-dev
Sat, 07 Nov 2015 01:05:49 -0000

On Fri, Nov 06, 2015 at 04:17:04PM -0800, Hans Wennborg via llvm-dev
wrote:
> On Fri, Nov 6, 2015 at 9:56 AM, Chris Bieneman via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
> > Hi LLVMDev,
> >
> > Since my last update we???ve landed patches for these issues:
> > * Bug 14200 - -fno-rtti not in cxxflags given by llvm-config
> > * Bug 23746 - test-suite lacks CMake support
> > * Bug 25059 - CMake libllvm.so.$MAJOR.$MINOR shared object name not
compatible with ldconfig
> >
> > On my last thread Jonathan Roelofs pointed out that there is a
workaround for Bug 21568 (Cannot add rpath), so I???m making it non-blocking.
Which leaves only Bug 23947, which I???m also going to move that to non-blocking
because it only applies to building LLVM on MIPS64 hardware.
> >
> > With those changes we have no issues left blocking deprecating
autoconf. There are still some issues we should track and follow through on, but
I think all major uses are covered and we can make CMake the only officially
supported way to build LLVM.
> >
> > My proposal at this point is that we should officially deprecate
autoconf, and I would like to follow this process for removing it:
> >
> > (1) Add a note to the release notes for 3.8, and a big warning at the
end of the configure script telling people to use CMake
> > (2) Support autoconf with bug fixes only, no new features for 3.8
> > (3) After the 3.8 branch remove all the makefiles and have the
configure script log a message to use CMake
> > (4) After the 3.9 branch remove the configure script completely
>
> This sounds excellent!
>
> During the 3.7 release, Dimitry reported that some components didn't
> build on FreeBSD with cmake yet. Is that fixed now? I'd like to have
> all binaries built with cmake for 3.8.

I think we're OK here.  I've got llvm, clang, clang-tools-extra,
compiler-rt, lld, lldb, and openmp building from cmake in the FreeBSD
ports collection.

-- Brooks