depends pkgconfig '--enable-pkgconfig' &&
depends libxml2   '--with-libxml=/usr' &&

optional_depends libxslt '--with-libxslt=/usr' '--without-libxslt' 'for XSLT-related functions' &&
optional_depends gnutls  '--with-gnutls=/usr'  '--without-gnutls'  'for encrypted communications'
optional_depends nss     '--with-nss=/usr'     '--without-nss'     'for encrypted communications' &&
optional_depends openssl '--with-openssl=/usr' '--without-openssl' 'for encrypted communications'
