| # =========================================================================== |
| # 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 |