Linking to a dynamic library on a Mac with full path

Question

I am linking a (Python extension) library that embeds the Matlab engine with the following command (generated using cmake)

c++ -mmacosx-version-min=10.6 -bun         


        

Answer 1

You can also use symbolic link !

Answer 2

Note that some of the problems with DYLD_LIBRARY_PATH can be prevented by using DYLD_FALLBACK_LIBRARY_PATH instead. This will only be used if the lib cannot be found in the default paths.

Answer 3

Manually changing the files using install_name_tool

install_name_tool -change "@loader_path/libeng.dylib" "/Applications/MATLAB_R2009b.app/bin/maci64/libeng.dylib" library.so 
install_name_tool -change "@loader_path/libmx.dylib" "/Applications/MATLAB_R2009b.app/bin/maci64/libmx.dylib" library.so 

I could use this as a temporary fix, but I wonder if there isn't a better solution where the linker is given a setting to use the full paths.

Answer 4

Look into the -rpath option to the ld command to control this. You might also be interested in the contents of https://github.com/bimargulies/jni-origin-testbed, which is a demonstration of some relevant technology.

The critical technique here is:

install_name_tool -change libsl2.so "@loader_path/libsl2.so" libsl1.so