+dnl ------------------
+dnl readline detection
+dnl ------------------
+
+abook_cv_readline=/usr
+AC_ARG_WITH(readline, [ --with-readline=DIR Where readline is installed ],
+ [if test $withval != yes; then
+ abook_cv_readline=$withval
+ fi
+ if test x$abook_cv_readline != x/usr; then
+ LDFLAGS="-L${abook_cv_readline}/lib $LDFLAGS"
+ CPPFLAGS="$CPPFLAGS -I${abook_cv_readline}/include"
+ fi])
+
+AC_LIB_READLINE
+
+if test x$ac_cv_lib_readline = xno -o x$ac_cv_lib_readline_history = xno; then
+ AC_MSG_ERROR([*** readline library not found or it doesn't support history ***])
+fi
+
+dnl -------------------------
+dnl end of readline detection
+dnl -------------------------
+
+dnl ------------------
+dnl vformat detection
+dnl ------------------
+
+AC_ARG_ENABLE(vformat, [ --enable-vformat Use libvformat is available ], [case "${enableval}" in
+ yes) vformat=true ;;
+ no) vformat=false ;;
+ *) AC_MSG_ERROR(bad value ${enableval} for --enable-vformat) ;;
+ esac], [vformat=false])
+if test x$vformat = xtrue; then
+ AC_CHECK_HEADER([vf_iface.h], [
+ AC_CHECK_LIB([vformat], [vf_read_file], [
+ MODULES="$MODULES m_vcf"
+ AC_DEFINE(HAVE_VFORMAT,1,[Defined if the vformat library is available])
+ have_vformat=yes
+ ])
+])
+fi
+AM_CONDITIONAL(ENABLE_VFORMAT_SUPPORT,test x"$have_vformat" = "xyes")
+
+dnl -------------------------
+dnl end of vformat detection
+dnl -------------------------
+
+
+if test x$ac_widec_possible = xyes; then
+ AC_DEFINE(HANDLE_MULTIBYTE, 1, [Handle multibyte characters])
+fi
+