Perl+Makefile based system old and broken

Hello Everyone,

I wanted to inform everybody of this patch: http://reviews.llvm.org/D12211

This patch gets rid of expand-vars.pl and uses CMake’s configure_file() function instead.

One major consequence this patch introduces is breaking the Perl+Makefile build system.

I was wondering if everyone would be ok if I submitted a patch that has the default target in the top level make give an explanation to the user why he/she should use the CMake build system instead effectively deprecating the Perl+Makefile build system.

And to the LLVM experts, is there a documented way to deprecate something?

Any help is greatly appreciated!

– Johnny

From: "Jonathan L via Openmp-commits Peyton" <openmp-commits@lists.llvm.org>
To: openmp-dev@lists.llvm.org, openmp-commits@lists.llvm.org
Sent: Thursday, August 20, 2015 3:58:30 PM
Subject: [Openmp-commits] Perl+Makefile based system old and broken

Hello Everyone,

I wanted to inform everybody of this patch:
http://reviews.llvm.org/D12211

This patch gets rid of expand-vars.pl and uses CMake’s
configure_file() function instead.

One major consequence this patch introduces is breaking the
Perl+Makefile build system.

I was wondering if everyone would be ok if I submitted a patch that
has the default target in the top level make give an explanation to
the user why he/she should use the CMake build system instead
effectively deprecating the Perl+Makefile build system.

I think that many are hopeful that LLVM will have switched completely to CMake for the next release anyway; I'm fine with killing the Perl+Makefile setup and replacing it with something that tells users what to do instead.

And to the LLVM experts, is there a documented way to deprecate
something?

Put it in the release notes. I don't think that we have a better way.

-Hal