--- /var/paludis/repositories/gentoo/dev-libs/boost/boost-1.35.0-r2.ebuild	2008-09-01 14:37:20.000000000 -0400
+++ /tmp/boost-1.35.0-r2.ebuild	2009-03-02 04:03:14.211987177 -0500
@@ -15,7 +15,24 @@
 	mirror://gentoo/boost-patches-${PATCHSET_VERSION}.tbz2"
 LICENSE="freedist Boost-1.0"
 SLOT="0"
-IUSE="debug doc expat icu mpi tools"
+
+# prefix these with 'boost_libs_' if USE_EXPAND="BOOST_LIBS" is added to base profile
+IUSE_BOOST_LIBS="
+	+boost_libs_date_time
+	+boost_libs_filesystem
+	+boost_libs_graph
+	+boost_libs_iostreams
+	+boost_libs_program_options
+	+boost_libs_python	
+	+boost_libs_regex
+	+boost_libs_serialization
+	+boost_libs_signals
+	+boost_libs_test
+	+boost_libs_thread
+	+boost_libs_wave
+"
+
+IUSE="${IUSE_BOOST_LIBS} debug doc expat icu mpi tools"
 
 RDEPEND="icu? ( >=dev-libs/icu-3.3 )
 	expat? ( dev-libs/expat )
@@ -83,9 +100,13 @@
 		OPTIONS="${OPTIONS} -sEXPAT_INCLUDE=/usr/include -sEXPAT_LIBPATH=/usr/$(get_libdir)"
 	fi
 
-	if ! use mpi ; then
-		OPTIONS="${OPTIONS} --without-mpi"
-	fi
+	! use mpi && OPTIONS="${OPTIONS} --without-mpi"
+
+	for boostlib in ${IUSE_BOOST_LIBS}; do
+		if ! use $boostlib; then
+			OPTIONS="${OPTIONS} --without-$(echo $boostlib | sed 's:[+-]::;s:boost_libs_::')"
+		fi
+	done
 
 	OPTIONS="${OPTIONS} --user-config=${S}/user-config.jam --boost-build=/usr/share/boost-build"
 }