OS X: use RPATH to reference libSBML?

[agarny]

Right now, if you build libSEDML on OS X and then do otool -L libsedml.0.dylib, I get:

libsedml.0.dylib:
    libsedml.0.dylib (compatibility version 0.0.0, current version 0.3.1)
    libsbml.5.dylib (compatibility version 5.0.0, current version 5.13.0)
    /usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 120.1.0)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1226.10.1)

However, it would be much better (for deployment purposes), if we were to get:

libsedml.0.dylib:
    libsedml.0.dylib (compatibility version 0.0.0, current version 0.3.1)
    @rpath/libsbml.5.dylib (compatibility version 5.0.0, current version 5.13.0)
    /usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 120.1.0)
    /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 1226.10.1)

Sure, this can be done manually by calling install_name_tool -change libsbml.5.dylib @rpath/libsbml.5.dylib libsedml.0.dylib, but it would be nice if it could be done automatically.