Locating dylib files

[tillkruss]

Is there a recommended way to locate .dylib files installed with Homebrew?

It seems like most are in /opt/homebrew/lib/:

/opt/homebrew/lib/libev.dylib
/opt/homebrew/lib/libjemalloc.dylib
/opt/homebrew/lib/liblz4.dylib

However OpenSSL doesn't seem to be present there:

/opt/homebrew/Cellar/[email protected]/1.1.1k/lib/libssl.dylib
/opt/homebrew/Cellar/[email protected]/1.1.1k/lib/libcrypto.dylib

We need to run MachO::Tools.change_install_name to update paths for a proprietary binary.

[carlocab]

If it's not keg-only (i.e. most formulae), then you can usually find them in ${HOMEBREW_PREFIX}/lib. If it is keg-only (e.g. OpenSSL), then you can (usually) find them at ${HOMEBREW_PREFIX}/opt/${formula_name}/lib (e.g. /opt/homebrew/opt/[email protected]/lib).

You really want to avoid paths that contain Cellar -- these will change with version/revision bumps. This will break your dylib links even when the updated libraries are API/ABI-compatible. This is also why the install names of these libraries will not contain a reference to the Cellar.

That said, it's a little strange to need MachO::Tools.change_install_name. That's usually a sign that something's broken in the build system.

[tillkruss]

Thanks @carlocab, that exactly what I was looking for.

[tillkruss]

@carlocab: If I want to sign my binary during the build process, should I just preemptively point all dependencies at the default symlinks?

Formula["libev"].opt_lib/"libev.dylib"
Formula["openssl"].opt_lib/"libssl.dylib"