1 # =========================================================================== 2 # http://www.gnu.org/software/autoconf-archive/ax_require_defined.html 3 # =========================================================================== 4 # 5 # SYNOPSIS 6 # 7 # AX_REQUIRE_DEFINED(MACRO) 8 # 9 # DESCRIPTION 10 # 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 14 # non-fatal: 15 # 16 # ./configure: line 1673: AX_CFLAGS_WARN_ALL: command not found 17 # 18 # It's like AC_REQUIRE except it doesn't expand the required macro. 19 # 20 # Here's an example: 21 # 22 # AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG]) 23 # 24 # LICENSE 25 # 26 # Copyright (c) 2014 Mike Frysinger <vapier@gentoo.org> 27 # 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 31 # warranty. 32 33 #serial 1 34 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
