When running scons to build the mongo C++ driver from:

http://downloads.mongodb.org/cxx-driver/mongodb-linux-x86_64-latest.tgz (dated 2013-06-20 06:07:57)

I get the error:

scons: *** [build/mongo/util/processinfo_darwin.o] Source `src/mongo/util/processinfo_darwin.cpp' not found, needed by target `build/mongo/util/processinfo_darwin.o'.
scons: building terminated because of errors.

The file is missing from the tarball, I went into github and searched the file from the mongo source, downloaded and copied the file and it seems to work now, I just get the following found no symbols messages at the end of the build:

/usr/bin/ranlib: file: build/libmongoclient.a(ssl_manager.o) has no symbols
ranlib build/libmongoclient.a
ranlib: file: build/libmongoclient.a(ssl_manager.o) has no symbols
Install file: "build/libmongoclient.a" as "libmongoclient.a"