[LLVMdev] RFC: Dropping support for building sanitizers with autotools

[Hal Finkel]

----- Original Message -----
> From: "Chandler Carruth" <chandlerc at google.com>
> To: "Alexey Samsonov" <vonosmas at gmail.com>
> Cc: "Nico Weber" <nicolasweber at gmx.de>, "Clang Developers List" <cfe-dev at cs.uiuc.edu>, "LLVM Dev"
> <llvmdev at cs.uiuc.edu>
> Sent: Thursday, February 12, 2015 8:41:18 PM
> Subject: Re: [LLVMdev] RFC: Dropping support for building sanitizers with	autotools
> 
> 
> On Thu, Feb 12, 2015 at 6:31 PM, Alexey Samsonov < vonosmas at gmail.com
> > wrote:
> 
> Hi everyone,
> 
> 
> TL;DR I plan to do subj unless anyone objects.
> 
> 
> Autotools support for building sanitizers was never complete, is a
> proper subset of CMake capabilities, and the gap between the
> features of CMake build and autotools is quickly increasing:
> 1) OS: autotools support Linux, Mac OS X and Android; CMake also
> supports FreeBSD and Windows.
> 2) Architectures: autotools support i386 and x86_64, CMake also
> supports MIPS, ARM/AArch64, PowerPC).
> 3) Library variants: autotools don't support building shared ASan
> runtime on Linux.
> 4 [!!!]) Autotools build doesn't have *any* support for building and
> running tests.
> 5) The sets of compiler flags we use to build runtimes are different
> in two builds, and are hard to kept in sync.
> 
> 
> Because of (4), sanitizer runtimes built with autotools are severely
> undertested, and maintaining two different build systems is a burden
> I would like to get rid of. Now seems to be a good time for that:
> we've cut off 3.6 release branch, and Hans assures me that 3.7
> release process will use CMake.
> +1, ship it.

I agree. I've found the autotools building support fairly useless precisely because there's no way to run the tests.

 -Hal

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-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory