[llvm-dev] [RFC] One or many git repositories?

Piotr Padlewski via llvm-dev llvm-dev at lists.llvm.org
Fri Jul 22 14:11:01 PDT 2016

2016-07-22 14:04 GMT-07:00 Tim Northover <t.p.northover at gmail.com>:

> On 22 July 2016 at 13:48, Piotr Padlewski via llvm-dev
> <llvm-dev at lists.llvm.org> wrote:
> >> The build system can help, you just need to have two (sparse) checkout:
> one for LLVM/clang and the other for clang-tidy, and configure the build
> with the LLVM/clang checkout adding the clang-tidy as external.
> > Can you describe it more?
> Something like this
> $ git clone git at github.com:llvm/llvm.git
> $ git clone git at github.com:llvm/llvm.git clang-tools-extras
> $ <make the clang-tools sparse if you want, doesn't seem strictly
> necessary though>
> $ mkdir build && cd build
> $ cmake ../llvm
> -DLLVM_EXTERNAL_CLANG_TOOLS_EXTRA_SOURCE_DIR=../clang-tools-extras/tools/clang/tools/clang-tools-extras
> $ make

Oh ok, it actually seems much easier than I thought! Thanks.

> > I don't get the approach, but it seems we are trying to make it easier
> to use llvm, but in the same time we are making it harder.

As Justin said, this isn't an issue for the majority of developers and
> it's a solvable problem for you.
> > BTW Does anyone knows why cmake is reloading each time I update
> llvm/clang repo? I hope that both approaches would solve this problem,
> because it doesn't seem like a something that should happen.
> It reconfigures every time a CMakelists.txt file used in the build is
> changed, which is unavoidable as far as I'm aware.
That might be the case.

> Cheers.
> Tim.
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