[llvm-dev] Looking for an out-of-source "Hello, world" LLVM/Clang pass example

[Andrzej Warzynski via llvm-dev]

Scott,

This is still very early stages, but you can be my guinea pig:

https://github.com/banach-space/llvm-tutor

It's a tutorial that I've been preparing recently and am hoping to
present somewhere at some point :-) I believe that it already covers 1),
2) and 3). I haven't had the time to work on 4). It's based on LLVM-8
and includes a working CI set-up, so that you can be confident that it
works. If it doesn't, ping me - I'm keen on improving it.

-- Andrzej

On 11/07/2019 00:54, Scott Pakin via llvm-dev wrote:
> Florian,
>
> On 7/10/19 2:17 PM, Florian Hahn wrote:
>> http://www.cs.cornell.edu/~asampson/blog/llvm.html describes how to
>> create an out-of-source pass (see 'Let’s Write a Pass’). I think it
>> is for LLVM 3.8 though.
>
> Thanks for pointing that out.  I had actually recently stumbled across
> that page (and the GitHub repository it references,
> https://github.com/sampsyo/llvm-pass-skeleton) while searching for an
> answer to my questions but wasn't sure how up-to-date the information
> is:
>
>    * Is add_library the currently recommended CMake macro call for
>      building an LLVM pass?
>      http://llvm.org/docs/WritingAnLLVMPass.html and
>      https://llvm.org/docs/CMake.html both point to add_llvm_library,
>      which I couldn't get to work.
>
>    * Is the legacy pass manager still the right way to make a pass
>      Clang-callable?  There's a currently active thread on this list,
>      "Status of the New Pass Manager", that makes me think I have some
>      code-rewriting in my future.
>
> -- Scott
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