+# FP_PROG_HSTAGS
+# ----------------
+# Sets the output variable HstagsCmd to the full Haskell tags program path.
+# HstagsCmd is empty if no such program could be found.
+AC_DEFUN([FP_PROG_HSTAGS],
+[AC_PATH_PROG([HstagsCmd], [hasktags])
+if test -z "$HstagsCmd"; then
+ AC_MSG_WARN([cannot find hasktags in your PATH, you will not be able to build the tags])
+fi
+])# FP_PROG_HSTAGS
+
+