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Rewrited NeL, NeLNS, and Snowballs configure.in scripts.
ADDED an 'acinclude.m4' file which contain all M4 macros to check paths of the libraries that we need and macros to check the intalation of NeL. This file is placed in the code directory and there is symbolic links to that file in the 'nel', 'nelns' and 'snowballs2' directories.

dnl ==========================================================================
dnl Configuration script for Snowballs 2
dnl ==========================================================================
dnl
dnl $Id: configure.in,v 1.8 2002/01/07 16:09:53 valignat Exp $
dnl 


dnl ==========================================================================
dnl Process this file with autoconf to produce a configure script.

AC_INIT(client/src/client.cpp)

MAJOR_VERSION=0
MINOR_VERSION=2
PICO_VERSION=0

AM_INIT_AUTOMAKE(snowballs, $MAJOR_VERSION.$MINOR_VERSION.$PICO_VERSION)

AM_CONFIG_HEADER(config.h)


dnl The following hack should ensure that configure doesn't add optimizing
dnl or debugging flags to CFLAGS or CXXFLAGS
CFLAGS="$CFLAGS "
CXXFLAGS="$CXXFLAGS "


dnl ==========================================================================
dnl Checks Snowballs modules (Client / Server) to install / Disable

SNO_SUBDIRS=""

dnl Client
AC_ARG_ENABLE( client,
    [  --disable-client        disable compilation and install of Snowballs Client.],
    [ AC_MSG_RESULT(disable Snowballs Client.) ],
    [ SNO_SUBDIRS="$SNO_SUBDIRS client"
      enable_client="yes" ] )

dnl Server
AC_ARG_ENABLE( server,
    [  --disable-server        disable compilation and install of Snowballs Server.],
    [ AC_MSG_RESULT(disable Snowballs Server.) ],
    [ SNO_SUBDIRS="$SNO_SUBDIRS server"
      enable_server="yes" ] )

AC_SUBST(SNO_SUBDIRS)


dnl ==========================================================================
dnl Checks for programs.
dnl ==========================================================================

AC_PROG_MAKE_SET

AC_PROG_CC
AC_PROG_CXX

AM_SANITY_CHECK

AC_PROG_INSTALL


dnl ==========================================================================
dnl Configure Settings
dnl ==========================================================================

dnl Set the C++ compiler as the default compiler for the configure script
dnl compilation tests
AC_LANG_CPLUSPLUS


dnl ====================================================================
dnl Debug/optimized compilation mode

AM_NEL_DEBUG


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


dnl ==========================================================================
dnl Checks for header files.
dnl ==========================================================================

AC_STDC_HEADERS
AC_CHECK_HEADERS(fcntl.h unistd.h)


dnl ==========================================================================
dnl X11

AC_PATH_X

if test ! "$no_x" = "yes" ; then
    if test ! X"$x_libraries" = X
    then
        LIBS="$LIBS -L$x_libraries"
    fi
    if test ! X"$x_includes" = X
    then
        CXXFLAGS="$CXXFLAGS -I$x_includes"
    fi
else
    if test "$enable_client" = "yes"
    then
        AC_MSG_ERROR(X11 must be installed.)
    fi
fi


dnl ==========================================================================
dnl Checks for libraries.
dnl ==========================================================================

dnl ==========================================================================
dnl STLPort

AM_PATH_STLPORT


dnl ==========================================================================
dnl NeL

AM_PATH_NEL("yes", "yes", $enable_client, $enable_client, $enable_client, "no")

CXXFLAGS="$CXXFLAGS ${NEL_CFLAGS}"
LIBS="$LIBS ${NEL_LIBS}"


dnl ==========================================================================
dnl FreeType 2

AM_PATH_FREETYPE($enable_client)

dnl ==========================================================================
dnl Checks for library functions.
dnl ==========================================================================


dnl ==========================================================================
dnl Output files to generate.
dnl ==========================================================================

AC_OUTPUT( Makefile                                         \
           client/Makefile                                  \
           client/src/Makefile                              \
           server/Makefile                                  \
           server/frontend/Makefile                         \
           server/frontend/src/Makefile                     \
           server/chat/Makefile                             \
           server/chat/src/Makefile                         \
           server/position/Makefile                         \
           server/position/src/Makefile                     \
)


dnl End of configure.in