[llvm-dev] Proposal for CIRCT incubator project

[Stephen Neuendorffer via llvm-dev]

Renato,

After looking at your testcase, it seems that you're trying to relocate a
'build' directory and are having to rewrite absolute paths in the build
directory.
Build directories are not really relocatable, partly because of absolute
paths, and partly because of dealing with shared library rpaths IIRC.  I
tried your testcase
with an install directory and it seems to work (at least for the MLIR
parts) even if the install directory is relocated. This is because a
different set of cmake exports
are generated for install directories.  Also note also that MLIR does
install the .inc files generated by tablegen for this to work.

Steve


On Thu, Jul 9, 2020 at 7:51 AM Stephen Neuendorffer <
stephen.neuendorffer at gmail.com> wrote:

> Renato, I'm happy to kibitz on the build problems.  Cmake seems to be
> working well at this point for us, but it took quite a bit to get there and
> there are some pitfalls. I'm aware of some namespace issues in mlir, but
> haven't gotten around to dealing with them.
>
> Steve
>
>
> On Thu, Jul 9, 2020, 3:47 AM Renato Golin <rengolin at gmail.com> wrote:
>
>> On Wed, 8 Jul 2020 at 22:43, Chris Lattner <clattner at nondot.org> wrote:
>> > I think that flang beat us to the punch as the first external MLIR user
>> :-) but thank you for your support Renato!
>>
>> Ah, but Flang is in the monorepo and builds together with LLVM, while
>> CIRCT (and my current project, Verona) "uses" MLIR/LLVM externally (as
>> a submodule).
>>
>> There are a number of build issues in both LLVM and MLIR that make it
>> awkward for projects in that category to use the LLVM libraries and
>> having a project in the llvm group will give us an "official" reason
>> to solve those problems more efficiently.
>>
>> I've been meaning to start a thread on that, but I need to collect all
>> the build issues I had in an email so we can discuss them. Not for
>> this thread, though. :)
>>
>> cheers,
>> --renato
>>
>
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