boost

To use a DESTDIR method just change the --prefix option in the install command:

    ./b2 --prefix=$DESTDIR/usr install threading=multi link=shared

(where $DESTDIR is set to /some/path/to/directory)

If you wish to get verbose output from ./b2, add -d+2 to the invocation. Doing that, you can see that only g++ is used, and that the default compile flags are -O3. If you wish to append any other CXXFLAGS, add cxxflags="-fwhatever" to the first ./b2 invocation (the second invocation for install only copies the files).