added darwin support

configure

@@ -1,5 +1,5 @@
 #!/bin/sh
-#	$Header: /cvs/maptools/cvsroot/libtiff/configure,v 1.16 2001-05-12 03:11:59 warmerda Exp $
+#	$Header: /cvs/maptools/cvsroot/libtiff/configure,v 1.17 2001-06-22 12:49:23 warmerda Exp $
 #
 # Tag Image File Format (TIFF) Software
 #
@@ -152,7 +152,7 @@ do
     -target|--target)		ac_prev=TARGET;;
     -target=*|--target=*)	TARGET="$ac_optarg" ;;
     -version|--version)
-	echo "This is TIFF configure $Revision: 1.16 $"
+	echo "This is TIFF configure $Revision: 1.17 $"
 	exit 0
 	;;
     -help|--help)		usage; exit 0;;
@@ -1177,6 +1177,14 @@ if [ "$DSO" = auto ]; then
 	DSOOPTS='-shared'
 	DSO=GNULD
 	;;
+    *-darwin*)
+        DSOSUF=${DIST_MAJOR}.dylib
+        DSOSUF_VERSION=${DIST_MAJOR}.${DIST_MINOR}.${DIST_POINT}.dylib
+        LIBCOPTS='-fno-common'
+          DSOLD=gcc
+        DSOOPTS='-dynamiclib -undefined suppress'
+        DSO=DARWIN
+        ;;
     *-linux*)
 	DSOSUF=so.${DIST_MAJOR}
 	DSOSUF_VERSION=${DSOSUF}.${DIST_MINOR}.${DIST_POINT}
@@ -1189,6 +1197,7 @@ if [ "$DSO" = auto ]; then
 	DSOOPTS='-shared'
 	DSO=OSF
 	;;
+
     esac
 fi
 if [ "$DSO" != no ]; then