I just checked on my system.  The command "craft -vi libsamplerate" in the craft environment builds it fine on my computer.  I am running Big Sur and on my system, Carbon.h is found at /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Carbon.framework/Versions/A/Headers/Carbon.h

Is it there on yours?

Read More...