# ===========================================================================

#    http://www.gnu.org/software/autoconf-archive/ax_require_defined.html

# ===========================================================================

#

# SYNOPSIS

#

#   AX_REQUIRE_DEFINED(MACRO)

#

# DESCRIPTION

#

#   AX_REQUIRE_DEFINED is a simple helper for making sure other macros have

#   been defined and thus are available for use.  This avoids random issues

#   where a macro isn't expanded.  Instead the configure script emits a

#   non-fatal:

#

#     ./configure: line 1673: AX_CFLAGS_WARN_ALL: command not found

#

#   It's like AC_REQUIRE except it doesn't expand the required macro.

#

#   Here's an example:

#

#     AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG])

#

# LICENSE

#

#   Copyright (c) 2014 Mike Frysinger <vapier@gentoo.org>

#

#   Copying and distribution of this file, with or without modification, are

#   permitted in any medium without royalty provided the copyright notice

#   and this notice are preserved. This file is offered as-is, without any

#   warranty.

#serial 1

AC_DEFUN([AX_REQUIRE_DEFINED], [dnl

  m4_ifndef([$1], [m4_fatal([macro ]$1[ is not defined; is a m4 file missing?])])

])dnl AX_REQUIRE_DEFINED