m4/ax_prog_java.m4

   1 # SPDX-License-Identifier: GPL-2.0-or-later WITH LicenseRef-Autoconf-exception-macro
   2 #
   3 # ===========================================================================
   4 #       https://www.gnu.org/software/autoconf-archive/ax_prog_java.html
   5 # ===========================================================================
   6 #
   7 # SYNOPSIS
   8 #
   9 #   AX_PROG_JAVA
  10 #
  11 # DESCRIPTION
  12 #
  13 #   Here is a summary of the main macros:
  14 #
  15 #   AX_PROG_JAVAC: finds a Java compiler.
  16 #
  17 #   AX_PROG_JAVA: finds a Java virtual machine.
  18 #
  19 #   AX_CHECK_CLASS: finds if we have the given class (beware of CLASSPATH!).
  20 #
  21 #   AX_CHECK_RQRD_CLASS: finds if we have the given class and stops
  22 #   otherwise.
  23 #
  24 #   AX_TRY_COMPILE_JAVA: attempt to compile user given source.
  25 #
  26 #   AX_TRY_RUN_JAVA: attempt to compile and run user given source.
  27 #
  28 #   AX_JAVA_OPTIONS: adds Java configure options.
  29 #
  30 #   AX_PROG_JAVA tests an existing Java virtual machine. It uses the
  31 #   environment variable JAVA then tests in sequence various common Java
  32 #   virtual machines. For political reasons, it starts with the free ones.
  33 #   You *must* call [AX_PROG_JAVAC] before.
  34 #
  35 #   If you want to force a specific VM:
  36 #
  37 #   - at the configure.in level, set JAVA=yourvm before calling AX_PROG_JAVA
  38 #
  39 #     (but after AC_INIT)
  40 #
  41 #   - at the configure level, setenv JAVA
  42 #
  43 #   You can use the JAVA variable in your Makefile.in, with @JAVA@.
  44 #
  45 #   *Warning*: its success or failure can depend on a proper setting of the
  46 #   CLASSPATH env. variable.
  47 #
  48 #   TODO: allow to exclude virtual machines (rationale: most Java programs
  49 #   cannot run with some VM like kaffe).
  50 #
  51 #   Note: This is part of the set of autoconf M4 macros for Java programs.
  52 #   It is VERY IMPORTANT that you download the whole set, some macros depend
  53 #   on other. Unfortunately, the autoconf archive does not support the
  54 #   concept of set of macros, so I had to break it for submission.
  55 #
  56 #   A Web page, with a link to the latest CVS snapshot is at
  57 #   <http://www.internatif.org/bortzmeyer/autoconf-Java/>.
  58 #
  59 #   This is a sample configure.in Process this file with autoconf to produce
  60 #   a configure script.
  61 #
  62 #     AC_INIT(UnTag.java)
  63 #
  64 #     dnl Checks for programs.
  65 #     AC_CHECK_CLASSPATH
  66 #     AX_PROG_JAVAC
  67 #     AX_PROG_JAVA
  68 #
  69 #     dnl Checks for classes
  70 #     AX_CHECK_RQRD_CLASS(org.xml.sax.Parser)
  71 #     AX_CHECK_RQRD_CLASS(com.jclark.xml.sax.Driver)
  72 #
  73 #     AC_OUTPUT(Makefile)
  74 #
  75 # LICENSE
  76 #
  77 #   Copyright (c) 2008 Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
  78 #
  79 #   This program is free software; you can redistribute it and/or modify it
  80 #   under the terms of the GNU General Public License as published by the
  81 #   Free Software Foundation; either version 2 of the License, or (at your
  82 #   option) any later version.
  83 #
  84 #   This program is distributed in the hope that it will be useful, but
  85 #   WITHOUT ANY WARRANTY; without even the implied warranty of
  86 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
  87 #   Public License for more details.
  88 #
  89 #   You should have received a copy of the GNU General Public License along
  90 #   with this program. If not, see <https://www.gnu.org/licenses/>.
  91 #
  92 #   As a special exception, the respective Autoconf Macro's copyright owner
  93 #   gives unlimited permission to copy, distribute and modify the configure
  94 #   scripts that are the output of Autoconf when processing the Macro. You
  95 #   need not follow the terms of the GNU General Public License when using
  96 #   or distributing such scripts, even though portions of the text of the
  97 #   Macro appear in them. The GNU General Public License (GPL) does govern
  98 #   all other use of the material that constitutes the Autoconf Macro.
  99 #
 100 #   This special exception to the GPL applies to versions of the Autoconf
 101 #   Macro released by the Autoconf Archive. When you make and distribute a
 102 #   modified version of the Autoconf Macro, you may extend this special
 103 #   exception to the GPL to apply to your modified version as well.
 104
 105 #serial 10
 106
 107 AU_ALIAS([AC_PROG_JAVA], [AX_PROG_JAVA])
 108 AC_DEFUN([AX_PROG_JAVA],[
 109 m4_define([m4_ax_prog_java_list], [kaffe java])dnl
 110 AS_IF([test "x$JAVAPREFIX" = x],
 111       [test x$JAVA = x && AC_CHECK_PROGS([JAVA], [m4_ax_prog_java_list])],
 112       [test x$JAVA = x && AC_CHECK_PROGS([JAVA], [m4_ax_prog_java_list], [], [$JAVAPREFIX/bin])])
 113 test x$JAVA = x && AC_MSG_ERROR([no acceptable Java virtual machine found in \$PATH])
 114 m4_undefine([m4_ax_prog_java_list])dnl
 115 AX_PROG_JAVA_WORKS
 116 AC_PROVIDE([$0])dnl
 117 ])