Doesn't work on Big Sur

[kode54]

This attempts to copy /usr/lib/libSystem.B.dylib into the bundle, which doesn't exist in the system. Nor do any of the other system dylibs, as they're in the pre-link system.

[kyr0]

Thank you for the report. This seems to strongly depend on the OS version. I wrote the script running Catalina. Maybe for Big Sur, it needs other paths. I guess the correct absolute paths on Big Sur (based on the pre-link process) can be identified by running ldd on the executable. One way of handling the issue would be to introduce a condition based on the OS version to select the correct paths depending on the version.

[kode54]

otool -L does return absolute paths, but also returns paths to system libraries such as /usr/lib/libSystem.B.dylib, which doesn't exist on Big Sur. Technically, the script should be disregarding any paths under /usr/lib/, as that's immutable anyway.

[kyr0]

Hey. Yeah after I wrote my reply I took a look at the script I wrote. I remembered my code wrongly. Back in 2019 I had a list of system related libs. I thought it was still this code. But actually, I rewrote it already and it dynamically analzes the executable...
https://github.com/PCemOnMac/bundler/blob/master/rewrite_dylibs.js#L28

Are you running the script against an executable that you built on the same Big Sur system?

[kode54]

Yes. It imports libraries that don't exist, because Big Sur only provides the entire contents of /usr/lib/ and /System/Library/Frameworks/ as pre-linked cache blobs for all supported architectures.

[kyr0]

I see. Yeah, that explains... so my assumption / code of the script as of now is wrong for all OS versions from Big Sur upwards probably. Do you have an idea how to deal with that on Big Sur? Unfortunately, I have no Big Sur system here to get my hands dirty :)

[kode54]

Well, on Big Sur, the /usr/lib/ and /System/Library/Frameworks/ paths will be immutable, so their contents should be trusted to stay put. Anything that should be bundled will exist in other paths, such as /Library/Frameworks/, /usr/local/lib/, or /opt/homebrew/lib/.

System dylib or framework objects exist here:

% ls -lah /System/Library/dyld/
total 7731224
drwxr-xr-x   10 root  wheel   320B Jan  1  2020 .
drwxr-xr-x  133 root  wheel   4.2K Jan  1  2020 ..
-rwxr-xr-x    1 root  admin   2.4G Jan  1  2020 aot_shared_cache
-rwxr-xr-x    1 root  admin     0B Jan  1  2020 aot_shared_cache.t8027
-rwxr-xr-x    1 root  admin   2.1G Jan  1  2020 dyld_shared_cache_arm64e
-rwxr-xr-x    1 root  admin   729K Jan  1  2020 dyld_shared_cache_arm64e.map
-rwxr-xr-x    1 root  admin   2.3G Jan  1  2020 dyld_shared_cache_x86_64
-rwxr-xr-x    1 root  admin   562K Jan  1  2020 dyld_shared_cache_x86_64.map
-rwxr-xr-x    1 root  admin   2.3G Jan  1  2020 dyld_shared_cache_x86_64h
-rwxr-xr-x    1 root  admin   562K Jan  1  2020 dyld_shared_cache_x86_64h.map

[kyr0]

I see, thank you for the insight. Could you provide me an example output of otool -L run against a built and linked pcem executable on Big Sur too?

[kode54]

Sure:

% otool -L pcem.arm64
pcem.arm64:
	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1292.60.1)
	/System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL (compatibility version 1.0.0, current version 1.0.0)
	/System/Library/Frameworks/OpenAL.framework/Versions/A/OpenAL (compatibility version 1.0.0, current version 1.0.0)
	/System/Library/Frameworks/IOKit.framework/Versions/A/IOKit (compatibility version 1.0.0, current version 275.0.0)
	/System/Library/Frameworks/Carbon.framework/Versions/A/Carbon (compatibility version 2.0.0, current version 164.0.0)
	/System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa (compatibility version 1.0.0, current version 23.0.0)
	/System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore (compatibility version 1.2.0, current version 1.11.0)
	/System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox (compatibility version 1.0.0, current version 1000.0.0)
	/opt/homebrew/opt/wxmac/lib/libwx_osx_cocoau_xrc-3.1.dylib (compatibility version 1.0.0, current version 1.0.0)
	/opt/homebrew/opt/wxmac/lib/libwx_osx_cocoau_html-3.1.dylib (compatibility version 1.0.0, current version 1.0.0)
	/opt/homebrew/opt/wxmac/lib/libwx_osx_cocoau_qa-3.1.dylib (compatibility version 1.0.0, current version 1.0.0)
	/opt/homebrew/opt/wxmac/lib/libwx_osx_cocoau_core-3.1.dylib (compatibility version 1.0.0, current version 1.0.0)
	/opt/homebrew/opt/wxmac/lib/libwx_baseu_xml-3.1.dylib (compatibility version 1.0.0, current version 1.0.0)
	/opt/homebrew/opt/wxmac/lib/libwx_baseu_net-3.1.dylib (compatibility version 1.0.0, current version 1.0.0)
	/opt/homebrew/opt/wxmac/lib/libwx_baseu-3.1.dylib (compatibility version 1.0.0, current version 1.0.0)
	/opt/homebrew/opt/sdl2/lib/libSDL2-2.0.0.dylib (compatibility version 15.0.0, current version 15.0.0)
	/usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 904.4.0)