[cfe-dev] GN build roundtable summary; adding GN build files to the repo

Brian Cain via cfe-dev cfe-dev at lists.llvm.org
Wed Oct 31 11:36:28 PDT 2018

On Wed, Oct 31, 2018, 1:32 PM Petr Hosek <phosek at chromium.org> wrote:

> On Wed, Oct 31, 2018 at 11:30 AM Brian Cain <brian.cain at gmail.com> wrote:
>> On Wed, Oct 31, 2018, 1:18 PM Nico Weber via cfe-dev <
>> cfe-dev at lists.llvm.org> wrote:
>>> Hi,
>>> first things first: If you're happy with cmake, you can stop reading
>>> now. Nobody is proposing that LLVM moves off cmake, and nobody is proposing
>>> anything that's causing people using cmake more work.
>>> At the LLVM conference, I gave a lightning talk [1] about using GN [2]
>>> to build LLVM and clang. cmake is great for many use cases, but in my
>>> opinion local day-to-day development isn't one of them. So I wrote GN build
>>> files for LLVM and clang, enough to make `ninja check-llvm check-clang
>>> check-lld` build everything needed for these three test suites and that all
>>> tests pass. This works on Linux, Mac, Win hosts targeting X86, ARM,
>>> AArch64. You can see them at [3].
>> I'm in favor of including the gn build files.
>> Aside: build of gn itself failed for me on Ubuntu 14, link errors related
>> to unsupported relocations, AFAICT this is just an incompatibility between
>> the Debian filesystem downloaded and Ubuntu 14.  Could you provide a
>> release tarball of gn for a couple of key platforms?
> We provide prebuilts for GN now, see
> https://gn.googlesource.com/gn/#getting-started

Oh, I see, that works well. Thanks!


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