# -*- autoconf -*-
# FILE: "/home/joze/src/tclreadline/configure.in"
# LAST MODIFICATION: "Sun Sep 19 23:15:53 1999 (joze)"
# (C) 1998, 1999 by Johannes Zellner, <johannes@zellner.org>
# $Id$
# ---
#
# tclreadline -- gnu readline for tcl
# Copyright (C) 1999  Johannes Zellner
#

AC_PREREQ(2.13)
AC_CONFIG_AUX_DIR(./aux)
AC_CANONICAL_HOST


TCLREADLINE_LPATH=`echo $LD_LIBRARY_PATH $LD_RUN_PATH $LPATH | sed 's/:/ /g'`
TCLREADLINE_LPATH="$TCLREADLINE_LPATH /lib /usr/lib /usr/local/lib"


#--------------------------------------------------------------------
#   See if there was a command-line option for where Tcl is;  if
#   not, search for Tcl.
#--------------------------------------------------------------------

READLINE_LIB_DIR=""
READLINE_VERSION_SUFFIX=""
for dir in $rl_library $TCLREADLINE_LPATH $prefix/lib/readline; do
    if test -r $dir/libreadline$SHLIB_SUFFIX; then
        READLINE_LIB_DIR=$dir
        break
    fi
    if test -r $dir/libreadline$SHLIB_SUFFIX.3.0; then
        READLINE_VERSION_SUFFIX=".3.0"
        READLINE_LIB_DIR=$dir
        break
    fi
    if test -r $dir/libreadline$SHLIB_SUFFIX.4.0; then
        READLINE_VERSION_SUFFIX=".4.0"
        READLINE_LIB_DIR=$dir
        break
    fi
done

if test -z "$READLINE_LIB_DIR"; then
    AC_MSG_ERROR([
  Can't find libreadline$SHLIB_SUFFIX.
  Use --with-readline-library to specify the directory
  containing libreadline$SHLIB_SUFFIX on your system.])
else
    AC_MSG_RESULT(${READLINE_LIB_DIR}/libreadline${SHLIB_SUFFIX}${READLINE_VERSION_SUFFIX})
fi



# ---
# check for the terminal library.
# This part was shamelessly stolen from
# the vim-5.5 configure.in.
# ---

olibs="$LIBS"
AC_MSG_CHECKING(--with-tlib argument)
AC_ARG_WITH(tlib, [  --with-tlib=library     terminal library to be used ],)
if test -n "$with_tlib"; then
	AC_MSG_RESULT($with_tlib)

	LIBS="$LIBS -l$with_tlib"
else
	AC_MSG_RESULT([automatic terminal library selection])
	dnl  Newer versions of ncurses are preferred over anything.
	dnl  Older versions of ncurses have bugs, get a new one!
	dnl  Digital Unix (OSF1) should use curses (Ronald Schild).
	case "`uname -s 2>/dev/null`" in
		OSF1) tlibs="ncurses curses termlib termcap";;



		*)    tlibs="ncurses termlib termcap curses";;


	esac
	for libname in $tlibs; do
		AC_CHECK_LIB($libname, tgetent,,)
		if test "x$olibs" != "x$LIBS"; then

			dnl It's possible that a library is found but it doesn't work
			dnl e.g., shared library that cannot be found
			dnl compile and run a test program to be sure

			AC_TRY_RUN([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
main() {char *s; s=(char *)tgoto("%p1%d", 0, 1); exit(0); }],
			res="OK", res="FAIL", res="FAIL")
			if test "$res" = "OK"; then






			  break
			fi


			AC_MSG_RESULT($libname library is not usable)
			LIBS="$olibs"

		fi

	done


fi
if test "x$olibs" != "x$LIBS"; then
	AC_MSG_CHECKING(whether we talk terminfo)
	AC_TRY_RUN([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
main()
{char *s; s=(char *)tgoto("%p1%d", 0, 1); exit(!strcmp(s==0 ? "" : s, "1")); }],
	AC_MSG_RESULT([no -- we are in termcap land]),
	AC_MSG_RESULT([yes -- terminfo spoken here]); AC_DEFINE(TERMINFO),

	AC_MSG_ERROR(failed to compile test program.))

else
	AC_MSG_ERROR(none found. Please retry with the --with-tlib argument)
fi

AC_MSG_CHECKING(whether termcap.h contains ospeed)
AC_TRY_LINK([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
			], [ospeed = 20000],
	AC_MSG_RESULT(yes); AC_DEFINE(HAVE_OSPEED),
	[AC_MSG_RESULT(no)
	AC_MSG_CHECKING(whether ospeed can be extern)
	AC_TRY_LINK([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
extern short ospeed;
			], [ospeed = 20000],
		AC_MSG_RESULT(yes); AC_DEFINE(OSPEED_EXTERN),
		AC_MSG_RESULT(no))]
)

AC_MSG_CHECKING([whether termcap.h contains UP, BC and PC])
AC_TRY_LINK([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
			], [if (UP == 0 && BC == 0) PC = 1],
	AC_MSG_RESULT(yes); AC_DEFINE(HAVE_UP_BC_PC),
	[AC_MSG_RESULT(no)
	AC_MSG_CHECKING([whether UP, BC and PC can be extern])
	AC_TRY_LINK([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
extern char *UP, *BC, PC;
			], [if (UP == 0 && BC == 0) PC = 1],
		AC_MSG_RESULT(yes); AC_DEFINE(UP_BC_PC_EXTERN),
		AC_MSG_RESULT(no))]
	)

AC_MSG_CHECKING(whether tputs() uses outfuntype)
AC_TRY_COMPILE([
#ifdef HAVE_TERMCAP_H
# include <termcap.h>
#endif
			], [extern int xx(); tputs("test", 1, (outfuntype)xx)],
	AC_MSG_RESULT(yes); AC_DEFINE(HAVE_OUTFUNTYPE),
	AC_MSG_RESULT(no))


#--------------------------------------------------------------------
#   Check for appropriate version of gnu readline
#   (older versions of gnu readline don't have
#    rl_callback_read_char ()).
#--------------------------------------------------------------------

save=$LIBS
LIBS="-L$READLINE_LIB_DIR -lreadline $TERM_LIB"
alternate=no
AC_CHECK_FUNC(
    rl_callback_read_char, alternate=yes, alternate=no
)
if test "$alternate" = "no"; then
    AC_MSG_ERROR(alternate interface not supported by this readline version.)
fi

AC_SUBST(SHLIB_CFLAGS)

AC_SUBST(SHLIB_LD)
AC_SUBST(SHLIB_LD_LIBS)

AC_SUBST(SHLIB_SUFFIX)


AC_SUBST(TERM_LIB)
AC_SUBST(READLINE_LIB_DIR)

AC_SUBST(TCLREADLINE_LIB_FILE)
AC_SUBST(TCLREADLINE_BUILD_LIB_SPEC)
AC_SUBST(TCLREADLINE_LIB_SPEC)

AC_SUBST(TCLREADLINE_LIB_DIR)