Compilers and settings used for Mac OS M1-M3 hardware

[ipcamit]

Hi, I was wondering if anyone can help, or share their recipe on how to properly compile and link libraries using enzyme on Mac OS. I think since julia is working on Mac with enzyme so this should be possible. Here are the list of issues I faced. Any help is welcome.

1. LLVM >= 15 does not work owing to the missing pass manager. (error when linking against LLDEnzymeFlags CMake target  #1389 (comment))
2. For LLVM 13, I can compile my library, but as it is a multisource library, it uses lld from brew to perform lto and my library compiles fine. Problem is that on Mac now if I want to link my enzyme gradiated library against any other program, I cant use any other linker, as I get following error

ld: __DATA_CONST segment missing SG_READ_ONLY flag in '/Users/ec2-user/libdescriptor/bin/libdescriptor.dylib'

I tried various steps like adding following linker options, -Wl,-segprot,__DATA_CONST,r,r etc, but none helps, I get similar messages.
3. If I use lld linker, above issue is sorted, but I get a different error,

ld64.lld: error: LC_DYLD_INFO_ONLY not found in /opt/homebrew/opt/[email protected]/Frameworks/Python.framework/Versions/3.12/lib/python3.12/config-3.12-darwin/libpython3.12.dylib

Which is apparently an issue with Mac? (llvm/llvm-project#64865)

So have anyone compiled a multifile library on Mac, and linked against a project? If so, can you tell compiler versions, mode of installation etc? Thank you