dyld: Symbol not found: __cg_jpeg_resync_to_restart

问题

I'm trying to run a java version of PowerLoom, but when I try to start it in the terminal, I get the following error message:

dyld: Symbol not found: __cg_jpeg_resync_to_restart
  Referenced from: /System/Library/Frameworks/ImageIO.framework/Versions/A/ImageIO
  Expected in: /usr/local/lib/libJPEG.dylib
 in /System/Library/Frameworks/ImageIO.framework/Versions/A/ImageIO
Trace/BPT trap: 5

This seems like a very similar problem to this question, except that the answers are specific to MAMP/Cacti. Any tips on how to deal with this, or even what this error message really means?

回答1:

If using Qt Creator, you have to uncheck the Add build library search path to DYLD_LIBRARY_PATH and DYLD_FRAMEWORK_PATH option from the Run section in the Projects tab:

回答2:

You could try this in shell:

$ cd /System/Library/Frameworks/ImageIO.framework/Versions/A/Resources

$ sudo ln -sf libJPEG.dylib /usr/local/lib/libJPEG.dylib

$ sudo ln -sf libPng.dylib /usr/local/lib/libPng.dylib

$ sudo ln -sf libTIFF.dylib /usr/local/lib/libTIFF.dylib

$ sudo ln -sf libGIF.dylib /usr/local/lib/libGIF.dylib

回答3:

This issue may be down to the application in question dynamically linking to the wrong version of the [libJPEG.dylib] library (it's also possible the correct version has been overwritten/modified). As explained in another question it is a problem that can occur when an application alters environment variables that control dynamic linking library location (e.g. On MacOS: DYLD_LIBRARY_PATH - more info see man dyld; On Linux: LD_LIBRARY_PATH - see man ld.so). It may be down to other factors such as dynamic link library config files but they have a system wide affect. You'll need to locate the variable setup in the application files and change it so that it prioritises the system paths e.g. (for MacOS):

export DYLD_LIBRARY_PATH=/usr/lib/:ADDITION_LIBRARY_PATH_LOCATION

回答4:

You likely have HomeBrew installed (or something like it). Something is setting DYLD_LIBRARY_PATH to /usr/local/lib first and you get a collision with Jpeg installed in /usr/local/lib/libJPEG.dylib instead of using the system version.

The (wrongly demoted) answer given by @Pierz above is correct.

来源：https://stackoverflow.com/questions/35509731/dyld-symbol-not-found-cg-jpeg-resync-to-restart

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dyld