#!/bin/sh

# not a normal autoconf configure script
# grab the file ../../perlvars that mapserver made for the perl mapscript
# build, and use gcc and ld flags

if [ ! -f ../../perlvars ] ; then
   echo "you must build MapServer first."
   exit
fi

MAPSERVERHOME=`head -1 ../../mapscriptvars | tail -1`
MAPSERVERDEFS=`head -2 ../../mapscriptvars | tail -1`
MAPSERVERINCS=`head -3 ../../mapscriptvars | tail -1`
MAPSERVERLIBS=`head -4 ../../mapscriptvars | tail -1`

# make sure link to mapscript.i exists

if [ ! -f mapscript.i ] ; then
    ln -s ../mapscript.i mapscript.i
fi

# check for --with-tcl= and/or --with-swig=
with_tcl=/usr/local
with_swig=/usr/local
with_linker_cc=no
for arg in $*
do
    case $arg in
	--help)
		echo "mapscript tcl configure options:"
		echo "--with-tcl=dir   where to find tcl  (lib/tclConfig.sh)"
		echo "--with-swig=dir  where to find swig (include/swig.h)"
		echo "--with-linker-cc use the compiler as linker front-end \
				(see README)"
		exit	
		;;
        --with-tcl=*)
		save_if=$IFS
		IFS==
		set -- $arg
		with_tcl=$2
		IFS=$save_ifs
		;;
	--with-swig=*)
		save_if=$IFS
		IFS==
		set -- $arg
		with_swig=$2
		IFS=$save_ifs
		;;
	--with-linker-cc)
		with_linker_cc=yes
		;;
    esac
done


# look for Tcl configs

echo "looking for Tcl in $with_tcl"
if [ ! -f $with_tcl/lib/tclConfig.sh ] ; then
    echo "can not find tclConfig.sh in $with_tcl"
    exit
fi
echo "                  found lib/tclConfig.sh in $with_tcl"

# look for swig

echo "looking for Swig in $with_swig"
if [ ! -f $with_swig/include/swig.h ] ; then
    echo "can not find swig.h in $with_swig/include"
    echo "using pre-built swig tcl interface"
    # mapscript_wrap.c included in package
else
    echo "                  found include/swig.h in $with_swig"
fi
SWIGDIR=$with_swig


# source the tcl Configs

. $with_tcl/lib/tclConfig.sh
echo "tcl version = $TCL_VERSION"


# if --with-linker-cc option set, then change ld command to use TCL_CC

if test "$with_linker_cc" = "yes" ; then
    # get cc command, without any options that may be present
    eval set -- $TCL_CC
    cc="$1"
    # get any linker command options
    eval set -- $TCL_SHLIB_LD
    shift
    # build the new command using cc and linker options
    TCL_SHLIB_LD="$cc $*"
fi


# ugh.  Tcl's tclConfig.sh only provides TCL_LD_SEARCH_FLAGS appropriate for
#       use with 'cc'.  if 'ld' is the shared library loader, the flags
#       might be wrong, try to fix.  this problem is often found on 
#       Solaris, HP-UX, IRIX, {Free,Open,Net}BSD, OSF, Dec/Compaq Unix

# first, get the shared lib loader command, should be ld or *cc

eval set -- $TCL_SHLIB_LD
ldcmd=`basename $1`
if test "$ldcmd" = "ld" ; then

    # this machine uses ld, now see if a flag begins with -Wl

    newarg=""
    eval set -- $TCL_LD_SEARCH_FLAGS
    space=""
    for arg in $*
    do
        case $TCL_LD_SEARCH_FLAGS in
	    -Wl*)
	        # yep, here's our problem child
	        # strip off first arg, change "," to " " via sh set hack
                IFSsave="$IFS"
	        IFS=","
	        eval set -- $arg
	        IFS="$IFSsave"
	        shift
	        arg="$*"
	        ;;
	    *)
		newarg="$newarg$space$arg"
		;;
        esac
	space=" "
    done
    TCL_LD_SEARCH_FLAGS="$newarg"
fi

# also check for Solaris loader flags '-z text', which causes unresolved
# link errors, because we're mixing -fPIC code (mapscript_wrap.o) with 
# non -fPIC code (libmap.a, etc.)  the resulting libMapscript.so will be
# mixed, so don't cause the link to fail.

TCL_SHLIB_LD=`echo $TCL_SHLIB_LD | sed -e 's/-z text//'` 


# fix up LIB_RUNTIME_DIR for those systems that leave it out

if test -z "$LIB_RUNTIME_DIR" ; then
    LIB_RUNTIME_DIR=$with_tcl/lib
fi


# create our Makefile

echo "creating Makefile"

sed -e "s%@MAPSERVERHOME@%$MAPSERVERHOME%g" \
    -e "s%@MAPSERVERDEFS@%$MAPSERVERDEFS%g" \
    -e "s%@MAPSERVERINCS@%$MAPSERVERINCS%g" \
    -e "s%@MAPSERVERLIBS@%$MAPSERVERLIBS%g" \
    -e "s%@TCL_PREFIX@%$TCL_PREFIX%g" \
    -e "s%@TCL_EXEC_PREFIX@%$TCL_EXEC_PREFIX%g" \
    -e "s%@TCL_CC@%$TCL_CC%g" \
    -e "s%@TCL_DEFS@%$TCL_DEFS%g" \
    -e "s%@TCL_SHLIB_SUFFIX@%$TCL_SHLIB_SUFFIX%g" \
    -e "s%@TCL_SHLIB_CFLAGS@%$TCL_SHLIB_CFLAGS%g" \
    -e "s%@TCL_LD_SEARCH_FLAGS@%$TCL_LD_SEARCH_FLAGS%g" \
    -e "s%@TCL_SHLIB_LD@%$TCL_SHLIB_LD%g" \
    -e "s%@TCL_LIB_SPEC@%$TCL_LIB_SPEC%g" \
    -e "s%@TCL_STUB_LIB_SPEC@%$TCL_STUB_LIB_SPEC%g" \
    -e "s%@TCL_LIBS@%$TCL_LIBS%g" \
    -e "s%@LIB_RUNTIME_DIR@%$LIB_RUNTIME_DIR%g" \
    -e "s%@TCL_DBGX@%$TCL_DBGX%g" \
    -e "s%@SWIGDIR@%$SWIGDIR%g" \
 <Makefile.in >Makefile