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- # ===========================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_require_one_func.html
- # ===========================================================================
- #
- # SYNOPSIS
- #
- # AX_REQUIRE_ONE_FUNC (FUNCTION..., [ACTION-IF-ANY-FOUND], [ACTION-IF-NONE-FOUND])
- #
- # DESCRIPTION
- #
- # AX_REQUIRE_ONE_FUNC is a simple wrapper for AC_CHECK_FUNCS. It calls
- # AC_CHECK_FUNCS on the list of functions named in the first argument,
- # then invokes ACTION-IF-ANY-FOUND if at least one of the functions exists
- # or ACTION-IF-NONE-FOUND if none of the functions exist.
- #
- # Here's an example:
- #
- # AX_REQUIRE_ONE_FUNC([posix_memalign memalign valloc], ,
- # [AC_MSG_ERROR([unable to allocate page-aligned memory])])
- #
- # LICENSE
- #
- # Copyright (c) 2008 Scott Pakin <pakin@uiuc.edu>
- #
- # 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 9
-
- AC_DEFUN([AX_REQUIRE_ONE_FUNC],
- [m4_define([ax_1func_cv], [AS_TR_SH(ax_cv_func_any_$1)])
- AC_CACHE_VAL([ax_1func_cv],
- [ax_1func_cv=no
- AC_CHECK_FUNCS([$1], [ax_1func_cv="$ax_1func_cv $ac_func"])])
- AS_IF([test "$ax_1func_cv" = "no"],
- [$3],
- [ax_1func_cv=`echo $ax_1func_cv | sed 's/^no //'`
- $2])
- ])
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