OpenSceneGraph Build Error on Mac OS X 10.6 Snow Leopard

[sam.receive@…]

sam-yeungs-macbook-pro-82:OpenSceneGraph-2.8.2 Sam$ sudo port install openscenegraph Password: ---> Computing dependencies for OpenSceneGraph ---> Building OpenSceneGraph Error: Target org.macports.build returned: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_OpenSceneGraph/work/OpenSceneGraph-2.8.2" && /usr/bin/make -j2 all " returned error 2 Command output: [ 58%] Built target osgdb_dds [ 59%] Built target osgdb_tga [ 59%] Built target osgdb_hdr [ 59%] Built target osgdb_dot [ 59%] Built target osgdb_vtf [ 60%] Built target osgdb_gdal [ 60%] Built target osgdb_ogr ld: warning: in /Library/Frameworks//libz.framework/libz, missing required architecture x86_64 in file Undefined symbols:

"_inflate", referenced from:

ive::DataInputStream::uncompress(std::basic_istream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&) constin DataInputStream.cpp.o

"_inflateEnd", referenced from:

ive::DataInputStream::uncompress(std::basic_istream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&) constin DataInputStream.cpp.o ive::DataInputStream::uncompress(std::basic_istream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&) constin DataInputStream.cpp.o

"_inflateInit2_", referenced from:

ive::DataInputStream::uncompress(std::basic_istream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&) constin DataInputStream.cpp.o

"_deflateInit2_", referenced from:

ive::DataOutputStream::compress(std::basic_ostream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) constin DataOutputStream.cpp.o

"_deflate", referenced from:

ive::DataOutputStream::compress(std::basic_ostream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) constin DataOutputStream.cpp.o

"_deflateEnd", referenced from:

ive::DataOutputStream::compress(std::basic_ostream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) constin DataOutputStream.cpp.o ive::DataOutputStream::compress(std::basic_ostream<char, std::char_traits<char> >&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) constin DataOutputStream.cpp.o

ld: symbol(s) not found collect2: ld returned 1 exit status make[2]: * [lib/osgPlugins-2.8.2/osgdb_ive.so] Error 1 make[1]: * [src/osgPlugins/ive/CMakeFiles/osgdb_ive.dir/all] Error 2 make[1]: * Waiting for unfinished jobs.... [ 60%] Built target osgdb_3dc make: * [all] Error 2

Error: Status 1 encountered during processing.

I have tried to install openscenegraph in my 10.6 SL MBP. But it fails to compile.... Please let me know if any further detail is needed. Thank you.