dnl
dnl This file is used by GNU autoconf to produce a shell script
dnl called "configure".  The "configure" shell script is run to
dnl produce a Makefile customized for the local environment.
dnl

# $Id: configure.in,v 1.9 1997/01/15 22:31:11 aswan Exp $

AC_INIT(main.cc)

AC_PROG_CC
AC_PROG_CXX

INC=""
LDFLAGS=""
LIBS=""

solaris=0
sunos=0

AC_CANONICAL_SYSTEM
case "$target" in
  sparc-sun-solaris*)
    solaris=1
    ;;

  sparc-sun-sunos4*)
    sunos=1
    ;;
esac

COMPAT_OBJS=""

#---------------------------------------
#  Look for a few header files
#---------------------------------------
AC_CHECK_HEADERS(stdarg.h sys/bitypes.h sys/select.h sys/types.h varargs.h)
RTPMON_PROG_CXX_MCAST

#----------------------------------------
#  See if we have snprintf()
#----------------------------------------
found_snprintf="no"
AC_CHECK_FUNC(snprintf, found_snprintf="yes")
if test "$found_snprintf" = "no" ; then
    # an undocumented solaris 2.5 feature...
    AC_CHECK_FUNC(_snprintf, found_snprintf="yes")
    if test "$found_snprintf" = "yes" ; then
	AC_DEFINE(snprintf,_snprintf)
    else
	COMPAT_OBJS="${COMPAT_OBJS} snprintf.o"
    fi
fi

if test "$found_snprintf" = "yes" ; then
    AC_DEFINE(HAVE_SNPRINTF)
fi

#----------------------------------------
#  Find X11 header files and libraries
#----------------------------------------
AC_PATH_X

if test "$no_x" = "yes" ; then
    AC_MSG_ERROR([Can't find X11 header files.])
fi

if test "$x_includes" != "" ; then
    INC="$INC -I$x_includes"
fi

if test "$x_libraries" != "" ; then
    if test "$solaris" = 1 ; then
        LDFLAGS="$LDFLAGS -R$x_libraries"
    fi

    LDFLAGS="$LDFLAGS -L$x_libraries"
fi

X11_LIB="-lX11"
# XXX any other X libs?

#----------------------------------------
#  Find Tcl/Tk (need versions >= 7.5/4.1)
#----------------------------------------

# Find Tcl

found_tcl_h="no"
libtcl="no"

    AC_MSG_CHECKING(for tcl.h)
    places="/usr/local/include/tcl8.3"

    for place in $places ; do
        if test -r $place/tcl.h ; then
            AC_MSG_RESULT($place)
            INC="$INC -I$place"
            found_tcl_h="yes"
            break
        fi
    done

    if test "$libtcl" = "-ltcl" ; then
       AC_MSG_WARN([Tcl library may be too old (need verion 7.5 or later)])
    fi

    if test "$found_tcl_h" = "no" ; then
        AC_MSG_RESULT(nope)
        AC_MSG_ERROR([Can't find tcl.h.  Try the --with-tcl option.])
    fi

    AC_MSG_CHECKING(for libtcl)
    places="$dir/lib \
            /usr/local/lib \
            $prefix/lib \
            $x_libraries"
    
    for place in $places; do
        if test "$solaris" = 1 ; then
            if test -r $place/libtcl7.6.so ; then
                AC_MSG_RESULT($place/libtcl7.6.so)
                LDFLAGS="$LDFLAGS -R$place -L$place"
                libtcl="-ltcl7.6"
            elif test -r $place/libtcl7.5.so ; then
                AC_MSG_RESULT($place/libtcl7.5.so)
                LDFLAGS="$LDFLAGS -R$place -L$place"
                libtcl="-ltcl7.5"
            elif test -r $place/lib/libtcl.so ; then
                AC_MSG_RESULT($place/libtcl.so)
                LDFLAGS="$LDFLAGS -R$place -L$place"
                libtcl="-ltcl"
            fi
        fi

        if test "$sunos" = 1 ; then
            if test -r $place/libtcl76.a ; then
                AC_MSG_RESULT($place/libtcl76.a)
                LDFLAGS="$LDFLAGS -L$place"
                libtcl="-ltcl76"
            elif test -r $place/libtcl75.a ; then
                AC_MSG_RESULT($place/libtcl75.a)
                LDFLAGS="$LDFLAGS -L$place"
                libtcl="-ltcl75"
            fi
        fi

        if test "$libtcl" = "no" ; then
            if test -r $place/libtcl83.a ; then
                AC_MSG_RESULT($place/libtcl83.a)
                LDFLAGS="$LDFLAGS -L$place"
                libtcl="-ltcl83"
            fi
        fi

        if test "$libtcl" != "no" ; then
            break
        fi
    done

    if test "$libtcl" = "no" ; then
        AC_MSG_RESULT(nope)
        AC_MSG_ERROR([Can't find libtcl.  Try the --with-tcl option.])
    fi

found_init_tcl="no"
AC_MSG_CHECKING(for Tcl runtime libraries)
places="/usr/local/lib/tcl8.3"

for place in $places; do
    if test -r $place/init.tcl ; then
        AC_MSG_RESULT($place)
        TCL_LIB=$place
        found_init_tcl="yes"
        break
    fi
done

if test "$found_init_tcl" = "no" ; then
    AC_MSG_RESULT(nope)
    AC_MSG_ERROR([Can't find init.tcl.  Try the --with-tcl option.])
fi

# Find Tk

found_tk_h="no"
libtk="no"

    AC_MSG_CHECKING(for tk.h)
    places="/usr/local/include/tk8.3"

    for place in $places; do
        if test -r $place/tk.h ; then
            AC_MSG_RESULT($place)
            INC="$INC -I$place"
            found_tk_h="yes"
            break
        fi
    done

    if test "$found_tk_h" = "no" ; then
        AC_MSG_RESULT(nope)
        AC_MSG_ERROR([Can't find tk.h.  Try the --with-tk option.])
    fi

    AC_MSG_CHECKING(for libtk)
    places="$dir/lib \
            /usr/local/lib \
            $prefix/lib \
            $x_libraries"
    
    for place in $places; do
            if test -r $place/libtk83.a ; then
                AC_MSG_RESULT($place/libtk83.a)
                LDFLAGS="$LDFLAGS -L$place"
                libtk="-ltk83"
            fi

        if test "$libtk" != "no" ; then
            break
        fi
    done

    if test "$libtk" = "-ltk" ; then
        AC_MSG_WARN([Tk library may be too old (need version 4.1 or later)])
    fi

    if test "$libtk" = "no" ; then
        AC_MSG_RESULT(nope)
        AC_MSG_ERROR([Can't find libtk.  Try the --with-tk option.])
    fi

found_tk_tcl="no"
AC_MSG_CHECKING(for Tk runtime libraries)
places="/usr/local/lib/tk8.3"

for place in $places; do
    if test -r $place/tk.tcl ; then
        AC_MSG_RESULT($place)
        TK_LIB=$place
        found_tk_tcl="yes"
        break
    fi
done

if test "$found_tk_tcl" = "no" ; then
    AC_MSG_RESULT(nope)
    AC_MSG_ERROR([Can't find tk.tcl.  Try the --with-tk option.])
fi

LIBS="$LIBS $libtk $libtcl $X11_LIB -lm"

#----------------------------------------
#  Any extra libs
#----------------------------------------
case "$target" in
  *-*-hpux9*)
    LIBS="$LIBS -ldld"
    ;;

  sparc-sun-solaris*)
    LIBS="$LIBS -lnsl -lsocket -ldl"
    ;;

  *-sgi-irix*)
    V_SHELL="SHELL = /bin/sh"
    ;;

  *-ibm-aix4*)
    if "`basename $CXX`" = "xlC" ; then
        LIBS="$LIBS -lld"
        AC_DEFINE(_AIX41)
    fi
    ;;

  # need to add others
esac

AC_SUBST(COMPAT_OBJS)
AC_SUBST(INC)
AC_SUBST(LDFLAGS)
AC_SUBST(LIBS)
AC_SUBST(TCL_LIB)
AC_SUBST(TK_LIB)
AC_SUBST(V_SHELL)

AC_OUTPUT(Makefile)