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Switch from objdump to dlopen on macOS BS to detect nested dependencies #2

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@helje5

macOS BS has the "dyld shared cache" which breaks running objdump on the dependencies. E.g. this results in BS Safari not having any features detected.

$ otool -L /Applications/Safari.app/Contents/MacOS/Safari
/Applications/Safari.app/Contents/MacOS/Safari (architecture x86_64):
	/System/Library/PrivateFrameworks/Safari.framework/Versions/A/Safari (compatibility version 528.0.0, current version 610.2.6)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1292.0.0)
/Applications/Safari.app/Contents/MacOS/Safari (architecture arm64e):
	/System/Library/PrivateFrameworks/Safari.framework/Versions/A/Safari (compatibility version 528.0.0, current version 610.2.6)
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1292.0.0)

W/ the "dyld shared cache", the /System/Library/PrivateFrameworks/Safari.framework doesn't actually exist on disk anymore (hence objdump can't analyse it).

Maybe we can use dlopen to load and open an executable and then somehow traverse the link list (w/o actually executing the binary)?

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