Running this command
scons --prefix=/tmp/mongoroot --sharedclient --full all install

(attaching patch momentarily)

You get this error message
==================================
/home/dhubler/temp/mongodb-src-r2.0.0/db/security_commands.cpp:112: undefined reference to `mongo::CmdAuthenticate::getUserObj(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, mongo::BSONObj&, std::basic_string<char, std::char_traits<char>, std::allocator<char> >&)'
/home/dhubler/temp/mongodb-src-r2.0.0/db/security_commands.cpp:136: undefined reference to `mongo::CmdAuthenticate::authenticate(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, bool)'
db/security_commands.os: In function `CmdLogout':
/home/dhubler/temp/mongodb-src-r2.0.0/db/security_common.h:79: undefined reference to `vtable for mongo::CmdLogout'
collect2: ld returned 1 exit status
scons: *** [libmongoclient.so] Error 1