Trying to using .dylib with Xcode project

Question

I am trying to use a 3rd party .dylib (simple C API) in my Mac OS Xcode Project (Not iOS). I either get "library not found for -...dylib" or "Undefined symbol: ...."

Xcode 10.3 (10G8) running on iMac with Mojave 10.14.6

I've found several articles relating to this problem and tried lots of options including: • Drag the .dylib into my project. Then went to project - target - build phases and verified that the .dylib was present under Link Binary with Libraries. I then include the supplied .h file into my project and attempt to call one of the C functions from the lib, but I always get "Undefined symbol: " during the link process.

• After this I tried going to my build settings and adding the .dylib to "Other Linker Flags" (eg -libname). I also added its location to "Library Search Paths" (eg "$(SRCROOT)/Libraries/") - the library is in a folder called 'Libraries' which is located in same the directory as my Xcode project. This changes the link error message to "library not found for -...dylib"

According to the 3rd party who developed the .dylib it "comes as a shared library with a simple C API. is available for 32 and 64-bits architectures on Windows (DLL) and Linux (DSO)."

The library file is actually named, by them, as .dylib

My project builds as 64bit intel for Mac OS 10.14

Answer 1

Problem solved. Turned out the function, while present in the header file, is NOT actually in the binary. So pretty much Xcode was telling me the facts, I just didn't believe it. Note to self: don't second guess the linker.