[bb install issue] Library not loaded

[Taewa]

I followed the installation steps from : https://github.com/AztecProtocol/aztec-packages/tree/master/barretenberg/cpp/src/barretenberg/bb#installation

but when I tried bb --version, I got the this error:

dyld[19062]: Library not loaded: /usr/local/opt/llvm@16/lib/libunwind.1.dylib
  Referenced from: <E1BF9892-14A9-31C8-960D-778F1B0864D3> /Users/USER_NAME/.bb/bb
  Reason: tried: '/usr/local/opt/llvm@16/lib/libunwind.1.dylib' (no such file), '/System/Volumes/Preboot/Cryptexes/OS/usr/local/opt/llvm@16/lib/libunwind.1.dylib' (no such file), '/usr/local/opt/llvm@16/lib/libunwind.1.dylib' (no such file)
[1]    19062 abort      bb --version

I found a person who had the same issue ( #8368 ) and I reinstalled LLVM as he did but no luck for me.

Here is my env:

nargo version = 0.33.0
noirc version = 0.33.0+325dac54efb6f99201de9fdeb0a507d45189607d
node = v18.17.0
MacOS

Does anyone know how to solve this issue?

[critesjosh]

Can you try installing bbup via the instructions here.

We need to update the README where you got those instructions from. cc @signorecello

[nmrshll]

Even installing with bbup can lead to this error. Since it's a dynamic linking error, it means you need to already have a library on your mac, otherwise the bb executable won't be able to run.

2 solutions, either:

1. install llvm@16 using homebrew. This will put the expected library in the place where it's looking:
   brew install llvm@16
2. tell the executable where to find the libunwind library:
   • make sure you can find the libunwind.1.dylib file as part of your llvm installation (llvm versions >12 should have it in a folder called lib/)
   • patch the executable using install_name_tool (it's built in macos, nothing to install): this link explains how.