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kc3-lang/libffi/m4/ax_require_defined.m4

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  • Author : Anthony Green
    Date : 2018-03-18 15:13:21
    Hash : f31b9153
    Message : Add m4/ax_require_defined.m4

  • m4/ax_require_defined.m4
  • # ===========================================================================
    #    https://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 2
    
    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