MacOSX: which dynamic libraries linked by binary?

Question

I have not been able to figure out why my binary is not loading. It is a dylib loaded by MATLAB (MEX-file), and links to quite a few dylibs in different locations. MATLAB tells

Answer 1

Try setting these environment variables before running matlab:

export DYLD_PRINT_LIBRARIES=1
export DYLD_PRINT_LIBRARIES_POST_LAUNCH=1
export DYLD_PRINT_RPATHS=1

Run man dyld for more possibilities.

You can also set the variables for just the matlab command like this:

DYLD_PRINT_LIBRARIES=1 DYLD_PRINT_LIBRARIES_POST_LAUNCH=1 DYLD_PRINT_RPATHS=1 matlab

Answer 2

Rob Mayoff's answer is a great solution when working with executables. If you find you need to check the runtime dependencies of a dylib, the following script my-ldd may be useful.

#!/usr/bin/env bash 

while getopts "r" OPTION; do
  case $OPTION in   
    r) export DYLD_PRINT_RPATHS=1;;
  esac
done
shift $((OPTIND-1))

cp `which true` .
DYLD_PRINT_LIBRARIES=1 \
DYLD_PRINT_LIBRARIES_POST_LAUNCH=1 \
DYLD_INSERT_LIBRARIES=$1 \
./true
rm ./true

where a the script may be invoked as

my-ldd ./foo.dylib

or (with rpath attempts echo'd)

my-ldd -r ./foo.dylib