# -*- autoconf -*-
# FILE: "/diska/home/joze/src/tclreadline/configure.in"
# LAST MODIFICATION: "Mon Aug 23 10:59:40 1999 (joze)"
# LAST MODIFICATION: "Mon Aug 23 16:45:33 1999 (joze)"
# (C) 1998, 1999 by Johannes Zellner, <johannes@zellner.org>
# $Id$
# ---
#
# tclreadline -- gnu readline for tcl
# Copyright (C) 1999  Johannes Zellner
#

  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



#--------------------------------------------------------------------
#   Specify termlib or curses library
#--------------------------------------------------------------------

opt_curses=no
AC_ARG_WITH(curses, 
[  --with-curses           force using the curses library instead of termcap],
opt_curses=$withval)

if test "$opt_curses" = "yes"; then
    TERMCAP_CHECK="curses ncurses"
else
    TERMCAP_CHECK="termcap curses ncurses"
fi


#--------------------------------------------------------------------
#   Check for termlib / curses / ncurses library.
#--------------------------------------------------------------------

AC_ARG_WITH(termcap-library,
            [  --with-termcap-library=DIR
                          search termcap (or curses / ncurses) library in DIR],
            termcap_lib=$withval, termcap_lib=$exec_prefix/lib)

tcheck_path="$termcap_lib $TCLREADLINE_LPATH $prefix/lib"
for tcheck in $TERMCAP_CHECK; do
    AC_MSG_CHECKING([whether we use lib$tcheck$SHLIB_SUFFIX])
    TERMCAP_LIB_DIR=""
    for dir in $tcheck_path; do
        if test -r $dir/lib$tcheck$SHLIB_SUFFIX; then
            TERMCAP_LIB_DIR=$dir
            break
        fi
    done

    if test -z "$TERMCAP_LIB_DIR"; then
        AC_MSG_RESULT(no)
    else
        TERMCAP_LIB=$tcheck
        TERMCAP_LOAD_PATH=${TERMCAP_LIB_DIR}/lib${tcheck}${SHLIB_SUFFIX}
        AC_MSG_RESULT(yes: $TERMCAP_LOAD_PATH)
        break
    fi
done

if test -z "$TERMCAP_LIB_DIR"; then
    AC_MSG_ERROR([
  None of "$TERMCAP_CHECK" found in:
  $tcheck_path
  Use --with-termcap-library to specify the directory containing 
  lib$TERMCAP_LIB$SHLIB_SUFFIX on your system.])
fi



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

save=$LIBS

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


# ---
# check, if curses or termcap is already
# linked with libreadline. (on newer Linux
# systems it is.)
# ---

AC_CHECK_LIB(readline, tputs, termcaps=yes, termcaps=no)
if test "$termcaps" = "no"; then

    # ---
    # nope. tputs() is unresolved in libreadline, so
    # check if we want libcurses or libtermcap.
    # ---

    AC_ARG_WITH(
        termcap, 
        [  --with-termcap          use termcap library instead of curses.],
        TERM_LIB="termcap",
        TERM_LIB="curses"
    )
    AC_CHECK_LIB($TERM_LIB, tputs, tputs_ok=yes, tputs_ok=no)
    if test "$tputs_ok" = "no"; then
        AC_MSG_ERROR(tputs() not found in lib$TERM_LIB.)
    else
        TERM_LIB=-l$TERM_LIB
    fi
fi
# ===========================================

AC_MSG_CHECKING([for the readline version number])
AC_TRY_RUN([
#include <stdio.h>
int main () {
    FILE *fp = fopen ("conftestversion", "w");
    extern char *rl_library_version;
    fprintf (fp, "%s", rl_library_version);

AC_SUBST(SHLIB_CFLAGS)

AC_SUBST(SHLIB_LD)
AC_SUBST(SHLIB_LD_LIBS)

AC_SUBST(SHLIB_SUFFIX)

AC_SUBST(TERMCAP_LIB_DIR)
AC_SUBST(TERM_LIB)
AC_SUBST(TERMCAP_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)