sessiond: prepare client replies through an lttng_payload
[lttng-tools.git] / m4 / ax_define_dir.m4
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1# ===========================================================================
2# http://www.gnu.org/software/autoconf-archive/ax_define_dir.html
3# ===========================================================================
4#
5# OBSOLETE MACRO
6#
7# Deprecated because it does not comply with the GNU Coding Standards. See
8# the autoconf manual section "Defining Directories" for alternatives.
9#
10# SYNOPSIS
11#
12# AX_DEFINE_DIR(VARNAME, DIR [, DESCRIPTION])
13#
14# DESCRIPTION
15#
16# This macro sets VARNAME to the expansion of the DIR variable, taking
17# care of fixing up ${prefix} and such.
18#
19# VARNAME is then offered as both an output variable and a C preprocessor
20# symbol.
21#
22# Example:
23#
24# AX_DEFINE_DIR([DATADIR], [datadir], [Where data are placed to.])
25#
26# LICENSE
27#
28# Copyright (c) 2008 Stepan Kasal <kasal@ucw.cz>
29# Copyright (c) 2008 Andreas Schwab <schwab@suse.de>
30# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
31# Copyright (c) 2008 Alexandre Oliva
32#
33# Copying and distribution of this file, with or without modification, are
34# permitted in any medium without royalty provided the copyright notice
35# and this notice are preserved. This file is offered as-is, without any
36# warranty.
37
38#serial 8
39
40AU_ALIAS([AC_DEFINE_DIR], [AX_DEFINE_DIR])
41AC_DEFUN([AX_DEFINE_DIR], [
42 prefix_NONE=
43 exec_prefix_NONE=
44 test "x$prefix" = xNONE && prefix_NONE=yes && prefix=$ac_default_prefix
45 test "x$exec_prefix" = xNONE && exec_prefix_NONE=yes && exec_prefix=$prefix
46dnl In Autoconf 2.60, ${datadir} refers to ${datarootdir}, which in turn
47dnl refers to ${prefix}. Thus we have to use `eval' twice.
48 eval ax_define_dir="\"[$]$2\""
49 eval ax_define_dir="\"$ax_define_dir\""
50 AC_SUBST($1, "$ax_define_dir")
51 AC_DEFINE_UNQUOTED($1, "$ax_define_dir", [$3])
52 test "$prefix_NONE" && prefix=NONE
53 test "$exec_prefix_NONE" && exec_prefix=NONE
54])
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