Potential fix

Author: yambati03

.github/scripts/python_wheels/cibw_before_all.sh

@@ -35,7 +35,14 @@ elif [ "$(uname)" == "Darwin" ]; then
         export MACOSX_DEPLOYMENT_TARGET="10.15"
     fi
 
-    ./b2 install --prefix=${BOOST_PREFIX} --with=all -d0 cxxflags="-mmacosx-version-min=${MACOSX_DEPLOYMENT_TARGET}" linkflags="-mmacosx-version-min=${MACOSX_DEPLOYMENT_TARGET}"
+    ./b2 install --prefix=${BOOST_PREFIX} --with=all -d0 \
+        cxxflags="-mmacosx-version-min=${MACOSX_DEPLOYMENT_TARGET} -Wl,-rpath,${BOOST_LIBRARYDIR}" \
+        linkflags="-mmacosx-version-min=${MACOSX_DEPLOYMENT_TARGET} -Wl,-rpath,${BOOST_LIBRARYDIR}"
+
+    # Patch @rpath manually if needed. This is redundant with the above, but serves as a fallback.
+    for dylib in "$BOOST_LIBRARYDIR"/libboost_*.dylib; do
+        install_name_tool -add_rpath "$BOOST_LIBRARYDIR" "$dylib"
+    done
 fi
 cd ..