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# =========================================================================== | ||
# 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 <[email protected]> | ||
# | ||
# 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 |