1 # ===========================================================================
2 # https://www.gnu.org/software/autoconf-archive/ax_require_defined.html
3 # ===========================================================================
7 # AX_REQUIRE_DEFINED(MACRO)
11 # AX_REQUIRE_DEFINED is a simple helper for making sure other macros have
12 # been defined and thus are available for use. This avoids random issues
13 # where a macro isn't expanded. Instead the configure script emits a
16 # ./configure: line 1673: AX_CFLAGS_WARN_ALL: command not found
18 # It's like AC_REQUIRE except it doesn't expand the required macro.
22 # AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG])
26 # Copyright (c) 2014 Mike Frysinger <vapier@gentoo.org>
28 # Copying and distribution of this file, with or without modification, are
29 # permitted in any medium without royalty provided the copyright notice
30 # and this notice are preserved. This file is offered as-is, without any
35 AC_DEFUN([AX_REQUIRE_DEFINED], [dnl
36 m4_ifndef([$1], [m4_fatal([macro ]$1[ is not defined; is a m4 file missing?])])
37 ])dnl AX_REQUIRE_DEFINED