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8990 :: SDL in a M1 Mac - can't find dylib

• Ethernaut (orginal) [2022-03-09T05:12:18+01:00] view original

  (Sorry if this is more of a SDL2/Homebrew question than Nim)

  Just got my new M1 MacBook pro, Nim is installed (via Homebrew) and seems to be running fine. However, when I try to compile and run anything using SDL2, I get an error saying "could not load: libSDL2.dylib".

  If I compile with -d:nimDebugDlOpen, I can see that all the paths it's searching for sdl2 are under "/usr/...", but the location that Homebrew installs any ARM library is under "/opt/homebrew/..."

  I could copy the files manually to my application, but that seems wrong and sounds like a pain to maintain (i.e. every time the library is updated). Is there a way to fix this so that the search path is correct?

  After some googling around I added these to ~/.zprofile:

  
  eval "$(/opt/homebrew/bin/brew shellenv)"
  
  export CPATH=/opt/homebrew/include
  
  export LIBRARY_PATH=/opt/homebrew/lib
  
  PATH=/opt/homebrew/bin:$PATH
  Run

  But that didn't work. It's like the C compiler is ignoring the path completely?

  Any help is welcome. Thanks!

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• jyapayne (orginal) [2022-03-09T19:04:51+01:00] view original

  You should be using LD_LIBRARY_PATH. Also, you should not overwrite it but append to it like so:

  
  export LD_LIBRARY_PATH=/opt/homebrew/lib:$LD_LIBRARY_PATH
  Run

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• Ethernaut (orginal) [2022-03-09T23:56:57+01:00] view original

  Thanks, but still doesn't work. The compiler still ignores any path I add. I'm currently setting these environment variables:

  
  export PATH=/opt/homebrew/Cellar:/opt/homebrew/lib:$PATH
  export CPATH=/opt/homebrew/include:$CPATH
  export LIBRARY_PATH=/opt/homebrew/Cellar:/opt/homebrew/lib:$LIBRARY_PATH
  export LD_LIBRARY_PATH=/opt/homebrew/Cellar:/opt/homebrew/lib:$LD_LIBRARY_PATH
  export DYLD_LIBRARY_PATH=/opt/homebrew/Cellar:/opt/homebrew/lib:$DYLD_LIBRARY_PATH
  Run

  I can verify that they are exported correctly in the command shell. But when I compile I get (formatted for clarity):

  dlopen(libSDL2.dylib, 0x0002): tried:
  'libSDL2.dylib' (no such file),
  '/usr/local/lib/libSDL2.dylib' (no such file),
  '/usr/lib/libSDL2.dylib' (no such file),
  '/usr/local/lib/libSDL2.dylib' (no such file),
  '/usr/lib/libSDL2.dylib' (no such file)
  could not load: libSDL2.dylib
  Run

  Super frustrating...

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• Ethernaut (orginal) [2022-03-10T00:05:25+01:00] view original

  I can get it to run by copying to the build folder and renaming (to remove version numbers) each and every .dylib file in use, but there's gotta be a better way...

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• Clonk (orginal) [2022-03-10T01:01:13+01:00] view original

  Well if the link target is the library name without version it won't be found by modifying LD_LIBRARY_PATH.

  Often what is done is to use symlink to solve this ergo having libmystuff.so being a symlink to libmystuff.so.1.7

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• seves (orginal) [2022-03-12T07:40:45+01:00] view original

  you schould check the architecture target of the dylib: file libSDL2.dylib

  M1 can run both arm and x86_64 program types, but as far i saw nim compiles to x86_64. So maybe you need to install or build libSDL2 for this target.

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