depends ffcall

optional_depends  'readline'                  \
                  '--with-readline'           \
                  '--without-readline'        \
                  'for GNU readline support'  &&

optional_depends  'gettext'            \
                  '--with-gettext'     \
                  '--without-gettext'  \
                  'for i18n support'   &&

optional_depends  libsigsegv                                             \
                  '--with-libsigsev-prefix=$TRACK_ROOT/'                 \
                  '--ignore-absence-of-libsigsegv'                       \
                  'for garbage collection and stack overflow detection'

.