[llvm-dev] RFC: LLVM Build System Future Direction

[David Zarzycki via llvm-dev]

Yes. Thanks!

> On Nov 3, 2019, at 8:09 PM, Chris Bieneman <chris.bieneman at me.com> wrote:
> 
> Dave,
> 
> We would keep the ability to specify source paths for things that live outside the mono-repo, just not for things inside the repository. This would have the impact of supporting `LLVM_EXTERNAL_*_SOURCE_DIR` for projects specified in `LLVM_EXTERNAL_PROJECTS` but not projects specified with `LLVM_ENABLE_PROJECTS`.
> 
> Does that address your concerns?
> 
> -Chris
> 
>> On Oct 30, 2019, at 6:37 AM, David Zarzycki via llvm-dev <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote:
>> 
>> 
>> 
>>> On Oct 29, 2019, at 7:09 PM, Chris Bieneman via llvm-dev <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote:
>>> 
>>> There was also agreement that in the monorepo it no longer makes sense to have an option to specify the source locations of sub-projects. That means we can remove the `LLVM_EXTERNAL_*_SOURCE_DIR` variables.
>>> 
>> 
>> Hi Chris,
>> 
>> What about genuine external projects? For example, I build Swift “unified” as a part of LLVM but I can’t keep the Swift source inside of the llvm-project directory due to how Git submodules work. In other words:
>> 
>> $ cd my_project
>> $ ls toolchain
>> cmark
>> llvm-project
>> swift
>> $ git submodule status
>>  bfa95d55b535fa178f75484b5e8f82ae3d8517af toolchain/cmark
>>  ea51a1ab2980d055c68820888ce255242f387c91 toolchain/llvm-project
>> +cec05255029d0ce354825e5530a47a5affb03975 toolchain/swift 
>> 
>> Dave
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> 

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