Fix: lttng: track-untrack: error assigned to wrong variable
[lttng-tools.git] / m4 / ax_check_class.m4
1 # ===========================================================================
2 # https://www.gnu.org/software/autoconf-archive/ax_check_class.html
3 # ===========================================================================
4 #
5 # SYNOPSIS
6 #
7 # AX_CHECK_CLASS
8 #
9 # DESCRIPTION
10 #
11 # AX_CHECK_CLASS tests the existence of a given Java class, either in a
12 # jar or in a '.class' file.
13 #
14 # *Warning*: its success or failure can depend on a proper setting of the
15 # CLASSPATH env. variable.
16 #
17 # Note: This is part of the set of autoconf M4 macros for Java programs.
18 # It is VERY IMPORTANT that you download the whole set, some macros depend
19 # on other. Unfortunately, the autoconf archive does not support the
20 # concept of set of macros, so I had to break it for submission. The
21 # general documentation, as well as the sample configure.in, is included
22 # in the AX_PROG_JAVA macro.
23 #
24 # LICENSE
25 #
26 # Copyright (c) 2008 Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
27 #
28 # This program is free software; you can redistribute it and/or modify it
29 # under the terms of the GNU General Public License as published by the
30 # Free Software Foundation; either version 2 of the License, or (at your
31 # option) any later version.
32 #
33 # This program is distributed in the hope that it will be useful, but
34 # WITHOUT ANY WARRANTY; without even the implied warranty of
35 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
36 # Public License for more details.
37 #
38 # You should have received a copy of the GNU General Public License along
39 # with this program. If not, see <https://www.gnu.org/licenses/>.
40 #
41 # As a special exception, the respective Autoconf Macro's copyright owner
42 # gives unlimited permission to copy, distribute and modify the configure
43 # scripts that are the output of Autoconf when processing the Macro. You
44 # need not follow the terms of the GNU General Public License when using
45 # or distributing such scripts, even though portions of the text of the
46 # Macro appear in them. The GNU General Public License (GPL) does govern
47 # all other use of the material that constitutes the Autoconf Macro.
48 #
49 # This special exception to the GPL applies to versions of the Autoconf
50 # Macro released by the Autoconf Archive. When you make and distribute a
51 # modified version of the Autoconf Macro, you may extend this special
52 # exception to the GPL to apply to your modified version as well.
53
54 #serial 12
55
56 AU_ALIAS([AC_CHECK_CLASS], [AX_CHECK_CLASS])
57 AC_DEFUN([AX_CHECK_CLASS],[
58 AC_REQUIRE([AX_PROG_JAVA])
59 ac_var_name=`echo $1 | sed 's/\./_/g'`
60 dnl Normally I'd use a AC_CACHE_CHECK here but since the variable name is
61 dnl dynamic I need an extra level of extraction
62 AC_MSG_CHECKING([for $1 class])
63 AC_CACHE_VAL(ax_cv_class_$ac_var_name, [
64 AX_TRY_COMPILE_JAVA([$1], , [eval "ac_cv_class_$ac_var_name=yes"],
65 [eval "ac_cv_class_$ac_var_name=no"])
66 eval "ac_var_val=$`eval echo ac_cv_class_$ac_var_name`"
67 eval "HAVE_$ac_var_name=$`echo ac_cv_class_$ac_var_val`"
68 HAVE_LAST_CLASS=$ac_var_val
69 if test x$ac_var_val = xyes; then
70 ifelse([$2], , :, [$2])
71 else
72 ifelse([$3], , :, [$3])
73 fi
74 ])
75 dnl for some reason the above statement didn't fall though here?
76 dnl do scripts have variable scoping?
77 eval "ac_var_val=$`eval echo ac_cv_class_$ac_var_name`"
78 AC_MSG_RESULT($ac_var_val)
79 ])
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