dnl figure out whether we need to build Tk
build_brlcad_tk="no (using system)"
if test "x$bc_build_tk" != "xno" ; then
build_brlcad_tk=yes
else
if test "x$bc_build_tk" = "xno" ; then
if test "x$tk_works" = "xno" ; then
AC_MSG_NOTICE([libtk was disabled, but no system Tk library was foun
BC_RETRY_CONFIGURE([$this], [$args])
AC_MSG_NOTICE([}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}}])
AC_MSG_NOTICE([Try adding --enable-tk-build])
AC_MSG_ERROR([*** Tk was disabled, yet no usable libtk system librar
fi
else
dnl automatic detection
if test "x$tk_works" = "xno" ; then
build_brlcad_tk=yes
fi
fi
fi
AC_MSG_CHECKING(whether to build Tk)