actions: introduce start session action
[lttng-tools.git] / m4 / ax_prog_java.m4
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6333b87b 2# https://www.gnu.org/software/autoconf-archive/ax_prog_java.html
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3# ===========================================================================
4#
5# SYNOPSIS
6#
7# AX_PROG_JAVA
8#
9# DESCRIPTION
10#
11# Here is a summary of the main macros:
12#
13# AX_PROG_JAVAC: finds a Java compiler.
14#
15# AX_PROG_JAVA: finds a Java virtual machine.
16#
17# AX_CHECK_CLASS: finds if we have the given class (beware of CLASSPATH!).
18#
19# AX_CHECK_RQRD_CLASS: finds if we have the given class and stops
20# otherwise.
21#
22# AX_TRY_COMPILE_JAVA: attempt to compile user given source.
23#
24# AX_TRY_RUN_JAVA: attempt to compile and run user given source.
25#
26# AX_JAVA_OPTIONS: adds Java configure options.
27#
28# AX_PROG_JAVA tests an existing Java virtual machine. It uses the
29# environment variable JAVA then tests in sequence various common Java
30# virtual machines. For political reasons, it starts with the free ones.
31# You *must* call [AX_PROG_JAVAC] before.
32#
33# If you want to force a specific VM:
34#
35# - at the configure.in level, set JAVA=yourvm before calling AX_PROG_JAVA
36#
37# (but after AC_INIT)
38#
39# - at the configure level, setenv JAVA
40#
41# You can use the JAVA variable in your Makefile.in, with @JAVA@.
42#
43# *Warning*: its success or failure can depend on a proper setting of the
44# CLASSPATH env. variable.
45#
46# TODO: allow to exclude virtual machines (rationale: most Java programs
47# cannot run with some VM like kaffe).
48#
49# Note: This is part of the set of autoconf M4 macros for Java programs.
50# It is VERY IMPORTANT that you download the whole set, some macros depend
51# on other. Unfortunately, the autoconf archive does not support the
52# concept of set of macros, so I had to break it for submission.
53#
54# A Web page, with a link to the latest CVS snapshot is at
55# <http://www.internatif.org/bortzmeyer/autoconf-Java/>.
56#
57# This is a sample configure.in Process this file with autoconf to produce
58# a configure script.
59#
60# AC_INIT(UnTag.java)
61#
62# dnl Checks for programs.
63# AC_CHECK_CLASSPATH
64# AX_PROG_JAVAC
65# AX_PROG_JAVA
66#
67# dnl Checks for classes
68# AX_CHECK_RQRD_CLASS(org.xml.sax.Parser)
69# AX_CHECK_RQRD_CLASS(com.jclark.xml.sax.Driver)
70#
71# AC_OUTPUT(Makefile)
72#
73# LICENSE
74#
75# Copyright (c) 2008 Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
76#
77# This program is free software; you can redistribute it and/or modify it
78# under the terms of the GNU General Public License as published by the
79# Free Software Foundation; either version 2 of the License, or (at your
80# option) any later version.
81#
82# This program is distributed in the hope that it will be useful, but
83# WITHOUT ANY WARRANTY; without even the implied warranty of
84# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
85# Public License for more details.
86#
87# You should have received a copy of the GNU General Public License along
6333b87b 88# with this program. If not, see <https://www.gnu.org/licenses/>.
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89#
90# As a special exception, the respective Autoconf Macro's copyright owner
91# gives unlimited permission to copy, distribute and modify the configure
92# scripts that are the output of Autoconf when processing the Macro. You
93# need not follow the terms of the GNU General Public License when using
94# or distributing such scripts, even though portions of the text of the
95# Macro appear in them. The GNU General Public License (GPL) does govern
96# all other use of the material that constitutes the Autoconf Macro.
97#
98# This special exception to the GPL applies to versions of the Autoconf
99# Macro released by the Autoconf Archive. When you make and distribute a
100# modified version of the Autoconf Macro, you may extend this special
101# exception to the GPL to apply to your modified version as well.
102
6333b87b 103#serial 10
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104
105AU_ALIAS([AC_PROG_JAVA], [AX_PROG_JAVA])
106AC_DEFUN([AX_PROG_JAVA],[
107m4_define([m4_ax_prog_java_list], [kaffe java])dnl
108AS_IF([test "x$JAVAPREFIX" = x],
109 [test x$JAVA = x && AC_CHECK_PROGS([JAVA], [m4_ax_prog_java_list])],
110 [test x$JAVA = x && AC_CHECK_PROGS([JAVA], [m4_ax_prog_java_list], [], [$JAVAPREFIX/bin])])
111test x$JAVA = x && AC_MSG_ERROR([no acceptable Java virtual machine found in \$PATH])
112m4_undefine([m4_ax_prog_java_list])dnl
113AX_PROG_JAVA_WORKS
114AC_PROVIDE([$0])dnl
115])
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