Tesseract .net on macos, how to reference libdl.dylib on macOS12?

Question

I'm running a .net application that requires a reference to libdl.so

System.DllNotFoundException : Unable to load shared library 'libdl.so' or one of its dependencies. In order to help diagnose loading problems, consider setting the DYLD_PRINT_LIBRARIES environment variable: dlopen(liblibdl.so, 0x0001): tried: 'liblibdl.so' (no such file), '/usr/local/lib/liblibdl.so' (no such file), '/usr/lib/liblibdl.so' (no such file), '/Users/Amplicity/Documents/liblibdl.so' (no such file)

After some light reading, i found that libdl.so is the linux equivalent of libdl.dylib, I then tried to find libdl.dylib on my machine.

➜  lib locate libdl.dylib
/Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/tvOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libdl.dylib
/Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/watchOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libdl.dylib
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libdl.dylib

There are only tvos, watchos, and ios signed libdl.dylib's available. Some more light reading reveals that somewhere around xcode 7, .dylib files were replaced with .tbd, which is a text file that references dylibs elsewhere.

➜  lib locate libdl.tbd
/Applications/Xcode.app/Contents/Developer/Platforms/AppleTVOS.platform/Developer/SDKs/AppleTVOS.sdk/usr/lib/libdl.tbd
/Applications/Xcode.app/Contents/Developer/Platforms/AppleTVSimulator.platform/Developer/SDKs/AppleTVSimulator.sdk/usr/lib/libdl.tbd
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/lib/libdl.tbd
/Applications/Xcode.app/Contents/Developer/Platforms/WatchOS.platform/Developer/SDKs/WatchOS.sdk/usr/lib/libdl.tbd
/Applications/Xcode.app/Contents/Developer/Platforms/WatchSimulator.platform/Developer/SDKs/WatchSimulator.sdk/usr/lib/libdl.tbd
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/libdl.tbd
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator.sdk/usr/lib/libdl.tbd
/Library/Developer/CommandLineTools/SDKs/MacOSX11.3.sdk/usr/lib/libdl.tbd
/Library/Developer/CommandLineTools/SDKs/MacOSX12.0.sdk/usr/lib/libdl.tbd
/Library/Developer/CommandLineTools/SDKs/MacOSX12.1.sdk/usr/lib/libdl.tbd
/Library/Developer/CommandLineTools/SDKs/MacOSX12.3.sdk/usr/lib/libdl.tbd

I attempted to symlink the .tbd to the .so that my .net application expects, but .net complained that it was net a mach-o file.

I then attempted to symlink the tvos .dylib to the .so, and got a different error stating that it needed to be signed for macos.

How can I find/conjure libdl.dylib on macOS12, so that I may directly reference it in my application?

Answer 1

I suppose you cannot rebuild that application, cause currently libdl.so` would not be requested as it is not deployed anymore as standalone.

Try to make symlink of libdl.so to libc.so (or whichever version is installed with your .net platform package, libc.so.x)