updated for version 7.0001
diff --git a/src/which.sh b/src/which.sh
new file mode 100755
index 0000000..8c2c698
--- /dev/null
+++ b/src/which.sh
@@ -0,0 +1,12 @@
+#! /bin/sh
+#
+# which.sh -- find where an executable is located.  It's here because the
+# "which" command is not supported everywhere.  Used by Makefile.
+
+IFS=":"
+for ac_dir in $PATH; do
+	if test -f "$ac_dir/$1"; then
+		echo "$ac_dir/$1"
+		break
+	fi
+done