# ===========================================================================
-# http://www.gnu.org/software/autoconf-archive/ax_require_defined.html
+# https://www.gnu.org/software/autoconf-archive/ax_require_defined.html
# ===========================================================================
#
# SYNOPSIS
# and this notice are preserved. This file is offered as-is, without any
# warranty.
-#serial 1
+#serial 2
AC_DEFUN([AX_REQUIRE_DEFINED], [dnl
m4_ifndef([$1], [m4_fatal([macro ]$1[ is not defined; is a m4 file missing?])])