Refactoring: use an opaque lttng_tracker_id type
[lttng-tools.git] / m4 / ax_config_feature.m4
1 # ===========================================================================
2 # https://www.gnu.org/software/autoconf-archive/ax_config_feature.html
3 # ===========================================================================
4 #
5 # SYNOPSIS
6 #
7 # AX_CONFIG_FEATURE(FEATURE-NAME, FEATURE-DESCRIPTION, DEFINE, DEFINE-DESCRIPTION, [ACTION-IF-ENABLED [, ACTION-IF-NOT-ENABLED]])
8 #
9 # DESCRIPTION
10 #
11 # AX_CONFIG_FEATURE is a simple wrapper for AC_ARG_ENABLE, it enables the
12 # feature FEATURE-NAME and AC_DEFINEs the passed DEFINE, depending on the
13 # user choice. DESCRIPTION will be used for AC_DEFINEs. ACTION-IF-ENABLED
14 # and ACTION-IF-NOT-ENABLED are the actions that will be run. A feature is
15 # enabled by default, in order to change this behaviour use the
16 # AX_CONFIG_FEATURE_DEFAULT_ENABLED and AX_CONFIG_FEATURE_DEFAULT_DISABLED
17 # macros.
18 #
19 # A simple example:
20 #
21 # AX_CONFIG_FEATURE_DEFAULT_ENABLED
22 # AX_CONFIG_FEATURE(feature_xxxxx, [turns on/off XXXXX support],
23 # HAVE_XXXXX, [Define if you want XXXXX support])
24 #
25 # ...
26 #
27 # AX_CONFIG_FEATURE_DEFAULT_DISABLED
28 # AX_CONFIG_FEATURE(feature_yyyyy, [turns on/off YYYYY support],
29 # HAVE_YYYYY, [Define if you want YYYYY support],
30 # [enable_yyyyy="yes"], [enable_yyyyy="no"])
31 # AM_CONDITIONAL(YYYYY, [test "$enable_yyyyy" = "yes"])
32 #
33 # AX_CONFIG_FEATURE_DEFAULT_ENABLED
34 # AX_CONFIG_FEATURE(...)
35 #
36 # ...
37 #
38 # If you have lot of features and you want a verbose dumping of each user
39 # selection use AX_CONFIG_FEATURE_VERBOSE. Use AX_CONFIG_FEATURE_SILENT in
40 # order to remove a previously AX_CONFIG_FEATURE_VERBOSE. By default
41 # features are silent.
42 #
43 # Use AX_CONFIG_FEATURE_ENABLE or AX_CONFIG_FEATURE_DISABLE in order to
44 # enable or disable a specific feature.
45 #
46 # Another simple example:
47 #
48 # AS_IF([some_test_here],[AX_CONFIG_FEATURE_ENABLE(feature_xxxxx)],[])
49 #
50 # AX_CONFIG_FEATURE(feature_xxxxx, [turns on/off XXXXX support],
51 # HAVE_XXXXX, [Define if you want XXXXX support])
52 # AX_CONFIG_FEATURE(feature_yyyyy, [turns on/off YYYYY support],
53 # HAVE_YYYYY, [Define if you want YYYYY support],
54 # [enable_yyyyy="yes"], [enable_yyyyy="no"])
55 #
56 # ...
57 #
58 # NOTE: AX_CONFIG_FEATURE_ENABLE() must be placed first of the relative
59 # AX_CONFIG_FEATURE() macro ...
60 #
61 # LICENSE
62 #
63 # Copyright (c) 2008 Francesco Salvestrini <salvestrini@users.sourceforge.net>
64 #
65 # This program is free software; you can redistribute it and/or modify it
66 # under the terms of the GNU General Public License as published by the
67 # Free Software Foundation; either version 2 of the License, or (at your
68 # option) any later version.
69 #
70 # This program is distributed in the hope that it will be useful, but
71 # WITHOUT ANY WARRANTY; without even the implied warranty of
72 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
73 # Public License for more details.
74 #
75 # You should have received a copy of the GNU General Public License along
76 # with this program. If not, see <https://www.gnu.org/licenses/>.
77 #
78 # As a special exception, the respective Autoconf Macro's copyright owner
79 # gives unlimited permission to copy, distribute and modify the configure
80 # scripts that are the output of Autoconf when processing the Macro. You
81 # need not follow the terms of the GNU General Public License when using
82 # or distributing such scripts, even though portions of the text of the
83 # Macro appear in them. The GNU General Public License (GPL) does govern
84 # all other use of the material that constitutes the Autoconf Macro.
85 #
86 # This special exception to the GPL applies to versions of the Autoconf
87 # Macro released by the Autoconf Archive. When you make and distribute a
88 # modified version of the Autoconf Macro, you may extend this special
89 # exception to the GPL to apply to your modified version as well.
90
91 #serial 11
92
93 AC_DEFUN([AX_CONFIG_FEATURE],[ dnl
94 m4_pushdef([FEATURE], patsubst([$1], -, _))dnl
95
96 AC_ARG_ENABLE([$1],AS_HELP_STRING([--enable-$1],[$2]),[
97 case "${enableval}" in
98 yes)
99 ax_config_feature_[]FEATURE[]="yes"
100 ;;
101 no)
102 ax_config_feature_[]FEATURE[]="no"
103 ;;
104 *)
105 AC_MSG_ERROR([bad value ${enableval} for feature --$1])
106 ;;
107 esac
108 ])
109
110 AS_IF([test "$ax_config_feature_[]FEATURE[]" = yes],[ dnl
111 AC_DEFINE([$3])
112 $5
113 AS_IF([test "$ax_config_feature_verbose" = yes],[ dnl
114 AC_MSG_NOTICE([Feature $1 is enabled])
115 ])
116 ],[ dnl
117 $6
118 AS_IF([test "$ax_config_feature_verbose" = yes],[ dnl
119 AC_MSG_NOTICE([Feature $1 is disabled])
120 ])
121 ])
122
123 AH_TEMPLATE([$3],[$4])
124
125 m4_popdef([FEATURE])dnl
126 ])
127
128 dnl Feature global
129 AC_DEFUN([AX_CONFIG_FEATURE_VERBOSE],[ dnl
130 ax_config_feature_verbose=yes
131 ])
132
133 dnl Feature global
134 AC_DEFUN([AX_CONFIG_FEATURE_SILENT],[ dnl
135 ax_config_feature_verbose=no
136 ])
137
138 dnl Feature specific
139 AC_DEFUN([AX_CONFIG_FEATURE_DEFAULT_ENABLED], [
140 ax_config_feature_[]FEATURE[]_default=yes
141 ])
142
143 dnl Feature specific
144 AC_DEFUN([AX_CONFIG_FEATURE_DEFAULT_DISABLED], [
145 ax_config_feature_[]FEATURE[]_default=no
146 ])
147
148 dnl Feature specific
149 AC_DEFUN([AX_CONFIG_FEATURE_ENABLE],[ dnl
150 ax_config_feature_[]patsubst([$1], -, _)[]=yes
151 ])
152
153 dnl Feature specific
154 AC_DEFUN([AX_CONFIG_FEATURE_DISABLE],[ dnl
155 ax_config_feature_[]patsubst([$1], -, _)[]=no
156 ])
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