depends pkgconfig &&

optional_depends libx11                                                                                                     \
                 "--with-x"                                                                                                 \
                 "--without-x --disable-pinentry-gtk --disable-pinentry-gtk2 --disable-pinentry-qt --disable-pinentry-qt4"  \
                 "for X11 support (needed for GTK+/GTK+2/QT4 support)"                                                      &&

if is_depends_enabled  "$SPELL"  "libx11"; then
  optional_depends gtk+                       \
                   ""                         \
                   "--disable-pinentry-gtk"   \
                   "to build GTK+ pinentry"   &&

  optional_depends gtk+2                      \
                   ""                         \
                   "--disable-pinentry-gtk2"  \
                   "to build GTK+2 pinentry"  &&

  optional_depends qt4                       \
                   "--enable-pinentry-qt4"   \
                   "--disable-pinentry-qt4"  \
                   "to build Qt4 pinentry"
fi