--- a/acinclude.m4	Thu Oct 09 00:16:45 2003 +0000
+++ b/acinclude.m4	Thu Oct 09 00:16:59 2003 +0000
@@ -749,3 +749,40 @@
               [Define if you have the external 'daylight' variable.])
    fi
 ])
+
+dnl Available from the GNU Autoconf Macro Archive at:
+dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_prog_perl_modules.html
+dnl
+AC_DEFUN([AC_PROG_PERL_MODULES],[dnl
+ac_perl_modules="$1"
+# Make sure we have perl
+if test -z "$PERL"; then
+AC_CHECK_PROG(PERL,perl,perl)
+fi
+
+if test "x$PERL" != x; then
+  ac_perl_modules_failed=0
+  for ac_perl_module in $ac_perl_modules; do
+    AC_MSG_CHECKING(for perl module $ac_perl_module)
+
+    # Would be nice to log result here, but can't rely on autoconf internals
+    $PERL "-M$ac_perl_module" -e exit > /dev/null 2>&1
+    if test $? -ne 0; then
+      AC_MSG_RESULT(no);
+      ac_perl_modules_failed=1
+   else
+      AC_MSG_RESULT(ok);
+    fi
+  done
+
+  # Run optional shell commands
+  if test "$ac_perl_modules_failed" = 0; then
+    :
+    $2
+  else
+    :
+    $3
+  fi
+else
+  AC_MSG_WARN(could not find perl)
+fi])dnl