File: configure.in

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dnl configure.in for GNU Robots
dnl Copyright (C) 1998 Jim Hall, jhall1@isd.net

dnl  This program is free software; you can redistribute it and/or modify
dnl  it under the terms of the GNU General Public License as published by
dnl  the Free Software Foundation; either version 2 of the License, or
dnl  (at your option) any later version.
dnl
dnl  This program is distributed in the hope that it will be useful,
dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl  GNU General Public License for more details.
dnl
dnl  You should have received a copy of the GNU General Public License
dnl  along with this program; if not, write to the Free Software
dnl  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

dnl thanks to david.madore@ens.fr
dnl thanks to Steinar Hamre <steinarh@stud.fim.ntnu.no>


dnl Process this file with autoconf to produce a configure script.
AC_INIT(include/api.h)


dnl Checks for programs.
AC_PROG_CC


dnl Locate X Windows
dnl We need AC_PATH_XTRA to also locate extra libaries X depends on.
dnl It will ``export'' X_CFLAGS, X_PRE_LIBS, X_EXTRA_LIBS and X_LIBS,
dnl but for some reason we need to add -lX11 ourselves.
AC_PATH_XTRA

if test "$have_x" = yes; then
  x_libs="-lX11"
else
  AC_MSG_ERROR(can't find X windows)
fi


dnl Checks for more X11 libraries, these go to X_LIBS.
AC_CHECK_LIB(Xpm, XpmCreatePixmapFromData,
  x_libs="-lXpm $x_libs",
  AC_MSG_ERROR(can't find libXpm),
  $X_LIBS $x_libs $X_PRE_LIBS $X_EXTRA_LIBS)


dnl finished with X, so we update X_LIBS.
X_LIBS="$X_LIBS $x_libs"


dnl Check for curses, add to CURSES_LIBS, and CURSES_CFLAGS.
dnl At this time, only ncurses is supported.
dnl We should check for SYSV curses too.
AC_CHECK_HEADERS(ncurses.h)


dnl allow user to specify directory where to find ncurses
if test -n "$with_ncurses"
then
  ncurses_cflags="-I$with_ncurses/include"
  ncurses_libs="-I$with_ncurses/lib"
fi

AC_CHECK_LIB(ncurses, initscr,
  CURSES_LIBS="$ncurses_libs -lncurses"
  CURSES_CFLAGS="$ncurses_cflags",
  AC_MSG_ERROR(can't find ncurses))

AC_SUBST(CURSES_LIBS)
AC_SUBST(CURSES_CFLAGS)


dnl Check for math library
AC_CHECK_LIB(m, pow)


dnl Check for guile, goes to LIBS.
dnl allow user to specify directory where to find guile
if test -n "$with_guile"
then
  guile_cflags="-I$with_guile/include"
  guile_libs="-L$with_guile/lib -lguile"
  dnl We should do something to set RPATH if needed.
  dnl We should find additional libraries. e.g. readline
else
  dnl guile-config is nice :)
  guile_cflags=`guile-config compile`
  guile_libs=`guile-config link`
fi
      
AC_CHECK_LIB(guile, gh_new_procedure,
  LIBS="$LIBS $guile_libs"
  CFLAGS="$CFLAGS $guile_cflags",
  AC_MSG_ERROR(can't find guile. This software REQUIRES guile.),
  $guile_libs)


dnl Some sytems need -ldl for dynamic library support.
dnl AC_CHECK_LIB(dl, dlopen)


dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS(unistd.h)


dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST


dnl Checks for library functions.


dnl Done.
AC_OUTPUT(lib/Makefile src/Makefile Makefile)