Add session configuration load capability to libconfig
[lttng-tools.git] / config / ac_define_dir.m4
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1dnl @synopsis AC_DEFINE_DIR(VARNAME, DIR [, DESCRIPTION])
2dnl
3dnl This macro sets VARNAME to the expansion of the DIR variable,
4dnl taking care of fixing up ${prefix} and such.
5dnl
6dnl VARNAME is then offered as both an output variable and a C
7dnl preprocessor symbol.
8dnl
9dnl Example:
10dnl
11dnl AC_DEFINE_DIR([DATADIR], [datadir], [Where data are placed to.])
12dnl
13dnl @category Misc
14dnl @author Stepan Kasal <kasal@ucw.cz>
15dnl @author Andreas Schwab <schwab@suse.de>
16dnl @author Guido U. Draheim <guidod@gmx.de>
17dnl @author Alexandre Oliva
18dnl @version 2006-10-13
19dnl @license AllPermissive
20
21AC_DEFUN([AC_DEFINE_DIR], [
22 prefix_NONE=
23 exec_prefix_NONE=
24 test "x$prefix" = xNONE && prefix_NONE=yes && prefix=$ac_default_prefix
25 test "x$exec_prefix" = xNONE && exec_prefix_NONE=yes && exec_prefix=$prefix
26dnl In Autoconf 2.60, ${datadir} refers to ${datarootdir}, which in turn
27dnl refers to ${prefix}. Thus we have to use `eval' twice.
28 eval ac_define_dir="\"[$]$2\""
29 eval ac_define_dir="\"$ac_define_dir\""
30 AC_SUBST($1, "$ac_define_dir")
31 AC_DEFINE_UNQUOTED($1, "$ac_define_dir", [$3])
32 test "$prefix_NONE" && prefix=NONE
33 test "$exec_prefix_NONE" && exec_prefix=NONE
34])
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