depends scons &&
depends readline &&
depends -sub CXX gcc &&
depends -sub CPP pcre '--use-system-pcre' &&
depends -sub "THREAD FILESYSTEM PROGRAM_OPTIONS" boost '--use-system-boost' &&

optional_depends google-perftools \
                 "--use-system-tcmalloc" \
                 "" \
                 "to use system version of tcmalloc library" &&

optional_depends snappy \
                 "--use-system-snappy" \
                 "" \
                 "to use system version of snappy library" &&

optional_depends LIBSASL \
                 "--use-sasl-client" \
                 "" \
                 "for SASL authentication in the client library" &&

optional_depends SSL "--ssl" "" "for OpenSSL support" &&
optional_depends libpcap "" "" "to build mongosniff utility" &&
optional_depends distcc "--distcc" "" "to use distcc for distributing builds"