JNI java/android support, by Michael Zucchi <notzed@gmail.com>

17 files changed, 1400 insertions, 0 deletions

diff --git a/m4/ax_check_class.m4 b/m4/ax_check_class.m4
new file mode 100644
index 0000000..098aa77
--- /dev/null
+++ b/m4/ax_check_class.m4
@@ -0,0 +1,144 @@
+# ===========================================================================
+#      http://www.gnu.org/software/autoconf-archive/ax_check_class.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_CHECK_CLASS
+#
+# DESCRIPTION
+#
+#   AX_CHECK_CLASS tests the existence of a given Java class, either in a
+#   jar or in a '.class' file.
+#
+#   *Warning*: its success or failure can depend on a proper setting of the
+#   CLASSPATH env. variable.
+#
+#   Note: This is part of the set of autoconf M4 macros for Java programs.
+#   It is VERY IMPORTANT that you download the whole set, some macros depend
+#   on other. Unfortunately, the autoconf archive does not support the
+#   concept of set of macros, so I had to break it for submission. The
+#   general documentation, as well as the sample configure.in, is included
+#   in the AX_PROG_JAVA macro.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation; either version 2 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 7
+
+AU_ALIAS([AC_CHECK_CLASS], [AX_CHECK_CLASS])
+AC_DEFUN([AX_CHECK_CLASS],[
+AC_REQUIRE([AX_PROG_JAVA])
+ac_var_name=`echo $1 | sed 's/\./_/g'`
+dnl Normaly I'd use a AC_CACHE_CHECK here but since the variable name is
+dnl dynamic I need an extra level of extraction
+AC_MSG_CHECKING([for $1 class])
+AC_CACHE_VAL(ax_cv_class_$ac_var_name, [
+if test x$ac_cv_prog_uudecode_base64 = xyes; then
+dnl /**
+dnl  * Test.java: used to test dynamicaly if a class exists.
+dnl  */
+dnl public class Test
+dnl {
+dnl
+dnl public static void
+dnl main( String[] argv )
+dnl {
+dnl     Class lib;
+dnl     if (argv.length < 1)
+dnl      {
+dnl             System.err.println ("Missing argument");
+dnl             System.exit (77);
+dnl      }
+dnl     try
+dnl      {
+dnl             lib = Class.forName (argv[0]);
+dnl      }
+dnl     catch (ClassNotFoundException e)
+dnl      {
+dnl             System.exit (1);
+dnl      }
+dnl     lib = null;
+dnl     System.exit (0);
+dnl }
+dnl
+dnl }
+cat << \EOF > Test.uue
+begin-base64 644 Test.class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+====
+EOF
+                if $UUDECODE Test.uue; then
+                        :
+                else
+                        echo "configure: __oline__: uudecode had trouble decoding base 64 file 'Test.uue'" >&AS_MESSAGE_LOG_FD
+                        echo "configure: failed file was:" >&AS_MESSAGE_LOG_FD
+                        cat Test.uue >&AS_MESSAGE_LOG_FD
+                        ac_cv_prog_uudecode_base64=no
+                fi
+        rm -f Test.uue
+        if AC_TRY_COMMAND($JAVA $JAVAFLAGS Test $1) >/dev/null 2>&1; then
+                eval "ac_cv_class_$ac_var_name=yes"
+        else
+                eval "ac_cv_class_$ac_var_name=no"
+        fi
+        rm -f Test.class
+else
+        AX_TRY_COMPILE_JAVA([$1], , [eval "ac_cv_class_$ac_var_name=yes"],
+                [eval "ac_cv_class_$ac_var_name=no"])
+fi
+eval "ac_var_val=$`eval echo ac_cv_class_$ac_var_name`"
+eval "HAVE_$ac_var_name=$`echo ac_cv_class_$ac_var_val`"
+HAVE_LAST_CLASS=$ac_var_val
+if test x$ac_var_val = xyes; then
+        ifelse([$2], , :, [$2])
+else
+        ifelse([$3], , :, [$3])
+fi
+])
+dnl for some reason the above statment didn't fall though here?
+dnl do scripts have variable scoping?
+eval "ac_var_val=$`eval echo ac_cv_class_$ac_var_name`"
+AC_MSG_RESULT($ac_var_val)
+])
diff --git a/m4/ax_check_classpath.m4 b/m4/ax_check_classpath.m4
new file mode 100644
index 0000000..3c9081a
--- /dev/null
+++ b/m4/ax_check_classpath.m4
@@ -0,0 +1,60 @@
+# ===========================================================================
+#    http://www.gnu.org/software/autoconf-archive/ax_check_classpath.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_CHECK_CLASSPATH
+#
+# DESCRIPTION
+#
+#   AX_CHECK_CLASSPATH just displays the CLASSPATH, for the edification of
+#   the user.
+#
+#   Note: This is part of the set of autoconf M4 macros for Java programs.
+#   It is VERY IMPORTANT that you download the whole set, some macros depend
+#   on other. Unfortunately, the autoconf archive does not support the
+#   concept of set of macros, so I had to break it for submission. The
+#   general documentation, as well as the sample configure.in, is included
+#   in the AX_PROG_JAVA macro.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation; either version 2 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 5
+
+AU_ALIAS([AC_CHECK_CLASSPATH], [AX_CHECK_CLASSPATH])
+AC_DEFUN([AX_CHECK_CLASSPATH],[
+if test "x$CLASSPATH" = x; then
+        echo "You have no CLASSPATH, I hope it is good"
+else
+        echo "You have CLASSPATH $CLASSPATH, hope it is correct"
+fi
+])
diff --git a/m4/ax_check_java_home.m4 b/m4/ax_check_java_home.m4
new file mode 100644
index 0000000..cfe8f58
--- /dev/null
+++ b/m4/ax_check_java_home.m4
@@ -0,0 +1,80 @@
+# ===========================================================================
+#    http://www.gnu.org/software/autoconf-archive/ax_check_java_home.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_CHECK_JAVA_HOME
+#
+# DESCRIPTION
+#
+#   Check for Sun Java (JDK / JRE) installation, where the 'java' VM is in.
+#   If found, set environment variable JAVA_HOME = Java installation home,
+#   else left JAVA_HOME untouch, which in most case means JAVA_HOME is
+#   empty.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Gleen Salmon <gleensalmon@yahoo.com>
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation; either version 2 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 6
+
+AU_ALIAS([AC_CHECK_JAVA_HOME], [AX_CHECK_JAVA_HOME])
+
+AC_DEFUN([AX_CHECK_JAVA_HOME],
+[AC_MSG_CHECKING([for JAVA_HOME])
+# We used a fake loop so that we can use "break" to exit when the result
+# is found.
+while true
+do
+  # If the user defined JAVA_HOME, don't touch it.
+  test "${JAVA_HOME+set}" = set && break
+
+  # On Mac OS X 10.5 and following, run /usr/libexec/java_home to get
+  # the value of JAVA_HOME to use.
+  # (http://developer.apple.com/library/mac/#qa/qa2001/qa1170.html).
+  JAVA_HOME=`/usr/libexec/java_home 2>/dev/null`
+  test x"$JAVA_HOME" != x && break
+
+  # See if we can find the java executable, and compute from there.
+  TRY_JAVA_HOME=`ls -dr /usr/java/* 2> /dev/null | head -n 1`
+  if test x$TRY_JAVA_HOME != x; then
+    PATH=$PATH:$TRY_JAVA_HOME/bin
+  fi
+  AC_PATH_PROG([JAVA_PATH_NAME], [java])
+  if test "x$JAVA_PATH_NAME" != x; then
+    JAVA_HOME=`echo $JAVA_PATH_NAME | sed "s/\(.*\)[[/]]bin[[/]]java.*/\1/"`
+    break
+  fi
+
+  AC_MSG_NOTICE([Could not compute JAVA_HOME])
+  break
+done
+AC_MSG_RESULT([$JAVA_HOME])
+])
diff --git a/m4/ax_check_java_plugin.m4 b/m4/ax_check_java_plugin.m4
new file mode 100644
index 0000000..34f3dc6
--- /dev/null
+++ b/m4/ax_check_java_plugin.m4
@@ -0,0 +1,101 @@
+# ===========================================================================
+#   http://www.gnu.org/software/autoconf-archive/ax_check_java_plugin.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_CHECK_JAVA_PLUGIN(<shell-variable>)
+#
+# DESCRIPTION
+#
+#   This macro sets <shell-variable> to empty on failure and to a compatible
+#   version of plugin.jar otherwise. Directories searched are /usr/java/*
+#   and /usr/local/java/*, which are assumed to be j{dk,re} installations.
+#   Apply the shell variable as you see fit. If sun changes things so
+#   <jre>/lib/plugin.jar is not the magic file it will stop working.
+#
+#   This macro assumes that unzip, zipinfo or pkzipc is avialable (and can
+#   list the contents of the jar archive). The first two are assumed to work
+#   similarly enough to the infozip versisonms. The pkzipc version is
+#   assumed to work if I undertstand the documentation on pkware's site but
+#   YMMV. I do not have access to pwkware's version to test it.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Duncan Simpson <dps@simpson.demon.co.uk>
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation; either version 2 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 6
+
+AU_ALIAS([DPS_CHECK_PLUGIN], [AX_CHECK_JAVA_PLUGIN])
+AC_DEFUN([AX_CHECK_JAVA_PLUGIN],
+[AC_REQUIRE([AC_PROG_AWK])
+AC_REQUIRE([AC_PROG_FGREP])
+AC_CHECK_PROG(ZIPINFO,[zipinfo unzip pkzipc])
+AC_MSG_CHECKING([for the java plugin])
+case "x$ZIPINFO" in
+[*/zipinfo)]
+	zipinf="zipinfo -1" ;;
+[*/unzip)]
+	zipinf="unzip -l";;
+[*/pkzipc)]
+	ziping="unzipc -view";;
+[x*)]
+	AC_MSG_RESULT([skiped, none of zipinfo, unzip and pkzipc found])
+	AC_SUBST($1,[])
+	zipinf="";;
+esac
+if test "x$zipinf" != "x"; then
+jplugin=""
+for jhome in `ls -dr /usr/java/* /usr/local/java/* 2> /dev/null`; do
+for jfile in lib/plugin.jar jre/lib/plugin.jar; do
+if test "x$jplugin" = "x" && test -f "$jhome/$jfile"; then
+eval "$zipinf $jhome/$jfile | $AWK '{ print \$NF; }' | $FGREP netscape/javascript/JSObject" >/dev/null 2>/dev/null
+if test $? -eq 0; then
+dnl Some version of gcj (and javac) refuse to work with some files
+dnl that pass this test. To stop this problem make sure that the compiler
+dnl still works with this jar file in the classpath
+cat << \EOF > Test.java
+/* [#]line __oline__ "configure" */
+public class Test {
+}
+EOF
+if eval "$JAVAC -classpath $jhome/$jfile Test.java 2>/dev/null >/dev/null" && test -f Test.class; then
+jplugin="$jhome/$jfile"
+fi
+rm -f Test.java Test.class
+fi; fi; done; done
+if test "x$jplugin" != "x"; then
+AC_SUBST($1,$jplugin)
+AC_MSG_RESULT($jplugin)
+else
+AC_MSG_RESULT([java plugin not found])
+AC_SUBST($1,[])
+fi
+fi
+])
diff --git a/m4/ax_java_check_class.m4 b/m4/ax_java_check_class.m4
new file mode 100644
index 0000000..bd5052a
--- /dev/null
+++ b/m4/ax_java_check_class.m4
@@ -0,0 +1,85 @@
+# ===========================================================================
+#    http://www.gnu.org/software/autoconf-archive/ax_java_check_class.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_JAVA_CHECK_CLASS(<class>,<action-if-found>,<action-if-not-found>)
+#
+# DESCRIPTION
+#
+#   Test if a Java class is available. Based on AX_PROG_JAVAC_WORKS. This
+#   version uses a cache variable which is both compiler, options and
+#   classpath dependent (so if you switch from javac to gcj it correctly
+#   notices and redoes the test).
+#
+#   The macro tries to compile a minimal program importing <class>. Some
+#   newer compilers moan about the failure to use this but fail or produce a
+#   class file anyway. All moaing is sunk to /dev/null since I only wanted
+#   to know if the class could be imported. This is a recommended followup
+#   to AX_CHECK_JAVA_PLUGIN with classpath appropriately adjusted.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Duncan Simpson <dps@simpson.demon.co.uk>
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation; either version 2 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 8
+
+AU_ALIAS([DPS_JAVA_CHECK_CLASS], [AX_JAVA_CHECK_CLASS])
+AC_DEFUN([AX_JAVA_CHECK_CLASS],[
+m4_define([cache_val],[m4_translit(ax_cv_have_java_class_$1, " ." ,"__")])
+if test "x$CLASSPATH" != "x"; then
+xtra=" with classpath ${CLASSPATH}"
+xopts=`echo ${CLASSPATH} | ${SED} 's/^ *://'`
+xopts="-classpath $xopts"
+else xtra=""; xopts=""; fi
+cache_var="cache_val"AS_TR_SH([_Jc_${JAVAC}_Cp_${CLASSPATH}])
+AC_CACHE_CHECK([if the $1 class is avialable$xtra], [$cache_var], [
+JAVA_TEST=Test.java
+CLASS_TEST=Test.class
+cat << \EOF > $JAVA_TEST
+/* [#]xline __oline__ "configure" */
+import $1;
+public class Test {
+}
+EOF
+if AC_TRY_COMMAND($JAVAC $JAVACFLAGS $xopts $JAVA_TEST) >/dev/null 2>&1; then
+  eval "${cache_var}=yes"
+else
+  eval "${cache_var}=no"
+  echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
+  cat $JAVA_TEST >&AS_MESSAGE_LOG_FD
+fi
+rm -f $JAVA_TEST $CLASS_TEST
+])
+if eval 'test "x$'${cache_var}'" = "xyes"'; then
+$2
+true; else
+$3
+false; fi])
diff --git a/m4/ax_java_options.m4 b/m4/ax_java_options.m4
new file mode 100644
index 0000000..36c10d9
--- /dev/null
+++ b/m4/ax_java_options.m4
@@ -0,0 +1,48 @@
+# ===========================================================================
+#      http://www.gnu.org/software/autoconf-archive/ax_java_options.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_JAVA_OPTIONS
+#
+# DESCRIPTION
+#
+#   AX_JAVA_OPTIONS adds configure command line options used for Java m4
+#   macros. This Macro is optional.
+#
+#   Note: This is part of the set of autoconf M4 macros for Java programs.
+#   It is VERY IMPORTANT that you download the whole set, some macros depend
+#   on other. Unfortunately, the autoconf archive does not support the
+#   concept of set of macros, so I had to break it for submission. The
+#   general documentation, as well as the sample configure.in, is included
+#   in the AX_PROG_JAVA macro.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Devin Weaver <ktohg@tritarget.com>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 6
+
+AU_ALIAS([AC_JAVA_OPTIONS], [AX_JAVA_OPTIONS])
+AC_DEFUN([AX_JAVA_OPTIONS],[
+AC_ARG_WITH(java-prefix,
+                        [  --with-java-prefix=PFX  prefix where Java runtime is installed (optional)])
+AC_ARG_WITH(javac-flags,
+                        [  --with-javac-flags=FLAGS flags to pass to the Java compiler (optional)])
+AC_ARG_WITH(java-flags,
+                        [  --with-java-flags=FLAGS flags to pass to the Java VM (optional)])
+JAVAPREFIX=$with_java_prefix
+JAVACFLAGS=$with_javac_flags
+JAVAFLAGS=$with_java_flags
+AC_SUBST(JAVAPREFIX)dnl
+AC_SUBST(JAVACFLAGS)dnl
+AC_SUBST(JAVAFLAGS)dnl
+AC_SUBST(JAVA)dnl
+AC_SUBST(JAVAC)dnl
+])
diff --git a/m4/ax_jni_include_dir.m4 b/m4/ax_jni_include_dir.m4
new file mode 100644
index 0000000..5769895
--- /dev/null
+++ b/m4/ax_jni_include_dir.m4
@@ -0,0 +1,120 @@
+# ===========================================================================
+#    http://www.gnu.org/software/autoconf-archive/ax_jni_include_dir.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_JNI_INCLUDE_DIR
+#
+# DESCRIPTION
+#
+#   AX_JNI_INCLUDE_DIR finds include directories needed for compiling
+#   programs using the JNI interface.
+#
+#   JNI include directories are usually in the java distribution This is
+#   deduced from the value of JAVAC. When this macro completes, a list of
+#   directories is left in the variable JNI_INCLUDE_DIRS.
+#
+#   Example usage follows:
+#
+#     AX_JNI_INCLUDE_DIR
+#
+#     for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS
+#     do
+#             CPPFLAGS="$CPPFLAGS -I$JNI_INCLUDE_DIR"
+#     done
+#
+#   If you want to force a specific compiler:
+#
+#   - at the configure.in level, set JAVAC=yourcompiler before calling
+#   AX_JNI_INCLUDE_DIR
+#
+#   - at the configure level, setenv JAVAC
+#
+#   Note: This macro can work with the autoconf M4 macros for Java programs.
+#   This particular macro is not part of the original set of macros.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Don Anderson <dda@sleepycat.com>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 8
+
+AU_ALIAS([AC_JNI_INCLUDE_DIR], [AX_JNI_INCLUDE_DIR])
+AC_DEFUN([AX_JNI_INCLUDE_DIR],[
+
+JNI_INCLUDE_DIRS=""
+
+test "x$JAVAC" = x && AC_MSG_ERROR(['\$JAVAC' undefined])
+AC_PATH_PROG([_ACJNI_JAVAC], [$JAVAC], [no])
+test "x$_ACJNI_JAVAC" = xno && AC_MSG_ERROR([$JAVAC could not be found in path])
+
+_ACJNI_FOLLOW_SYMLINKS("$_ACJNI_JAVAC")
+_JTOPDIR=`echo "$_ACJNI_FOLLOWED" | sed -e 's://*:/:g' -e 's:/[[^/]]*$::'`
+case "$host_os" in
+        darwin*)        _JTOPDIR=`echo "$_JTOPDIR" | sed -e 's:/[[^/]]*$::'`
+                        _JINC="$_JTOPDIR/Headers";;
+        *)              _JINC="$_JTOPDIR/include";;
+esac
+_AS_ECHO_LOG([_JTOPDIR=$_JTOPDIR])
+_AS_ECHO_LOG([_JINC=$_JINC])
+
+# On Mac OS X 10.6.4, jni.h is a symlink:
+# /System/Library/Frameworks/JavaVM.framework/Versions/Current/Headers/jni.h
+# -> ../../CurrentJDK/Headers/jni.h.
+if test -f "$_JINC/jni.h" || test -L "$_JINC/jni.h"; then
+        JNI_INCLUDE_DIRS="$JNI_INCLUDE_DIRS $_JINC"
+else
+        _JTOPDIR=`echo "$_JTOPDIR" | sed -e 's:/[[^/]]*$::'`
+        if test -f "$_JTOPDIR/include/jni.h"; then
+                JNI_INCLUDE_DIRS="$JNI_INCLUDE_DIRS $_JTOPDIR/include"
+        else
+                AC_MSG_ERROR([cannot find java include files])
+        fi
+fi
+
+# get the likely subdirectories for system specific java includes
+case "$host_os" in
+bsdi*)          _JNI_INC_SUBDIRS="bsdos";;
+freebsd*)       _JNI_INC_SUBDIRS="freebsd";;
+linux*)         _JNI_INC_SUBDIRS="linux genunix";;
+osf*)           _JNI_INC_SUBDIRS="alpha";;
+solaris*)       _JNI_INC_SUBDIRS="solaris";;
+mingw*)		_JNI_INC_SUBDIRS="win32";;
+cygwin*)	_JNI_INC_SUBDIRS="win32";;
+*)              _JNI_INC_SUBDIRS="genunix";;
+esac
+
+# add any subdirectories that are present
+for JINCSUBDIR in $_JNI_INC_SUBDIRS
+do
+    if test -d "$_JTOPDIR/include/$JINCSUBDIR"; then
+         JNI_INCLUDE_DIRS="$JNI_INCLUDE_DIRS $_JTOPDIR/include/$JINCSUBDIR"
+    fi
+done
+])
+
+# _ACJNI_FOLLOW_SYMLINKS <path>
+# Follows symbolic links on <path>,
+# finally setting variable _ACJNI_FOLLOWED
+# ----------------------------------------
+AC_DEFUN([_ACJNI_FOLLOW_SYMLINKS],[
+# find the include directory relative to the javac executable
+_cur="$1"
+while ls -ld "$_cur" 2>/dev/null | grep " -> " >/dev/null; do
+        AC_MSG_CHECKING([symlink for $_cur])
+        _slink=`ls -ld "$_cur" | sed 's/.* -> //'`
+        case "$_slink" in
+        /*) _cur="$_slink";;
+        # 'X' avoids triggering unwanted echo options.
+        *) _cur=`echo "X$_cur" | sed -e 's/^X//' -e 's:[[^/]]*$::'`"$_slink";;
+        esac
+        AC_MSG_RESULT([$_cur])
+done
+_ACJNI_FOLLOWED="$_cur"
+])# _ACJNI
diff --git a/m4/ax_prog_jar.m4 b/m4/ax_prog_jar.m4
new file mode 100644
index 0000000..776e804
--- /dev/null
+++ b/m4/ax_prog_jar.m4
@@ -0,0 +1,52 @@
+# ===========================================================================
+#        http://www.gnu.org/software/autoconf-archive/ax_prog_jar.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PROG_JAR
+#
+# DESCRIPTION
+#
+#   AX_PROG_JAR tests for an existing jar program. It uses the environment
+#   variable JAR then tests in sequence various common jar programs.
+#
+#   If you want to force a specific compiler:
+#
+#   - at the configure.in level, set JAR=yourcompiler before calling
+#   AX_PROG_JAR
+#
+#   - at the configure level, setenv JAR
+#
+#   You can use the JAR variable in your Makefile.in, with @JAR@.
+#
+#   Note: This macro depends on the autoconf M4 macros for Java programs. It
+#   is VERY IMPORTANT that you download that whole set, some macros depend
+#   on other. Unfortunately, the autoconf archive does not support the
+#   concept of set of macros, so I had to break it for submission.
+#
+#   The general documentation of those macros, as well as the sample
+#   configure.in, is included in the AX_PROG_JAVA macro.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Egon Willighagen <e.willighagen@science.ru.nl>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 6
+
+AU_ALIAS([AC_PROG_JAR], [AX_PROG_JAR])
+AC_DEFUN([AX_PROG_JAR],[
+AC_REQUIRE([AC_EXEEXT])dnl
+if test "x$JAVAPREFIX" = x; then
+        test "x$JAR" = x && AC_CHECK_PROGS(JAR, jar$EXEEXT)
+else
+        test "x$JAR" = x && AC_CHECK_PROGS(JAR, jar, $JAVAPREFIX)
+fi
+test "x$JAR" = x && AC_MSG_ERROR([no acceptable jar program found in \$PATH])
+AC_PROVIDE([$0])dnl
+])
diff --git a/m4/ax_prog_java.m4 b/m4/ax_prog_java.m4
new file mode 100644
index 0000000..5471f32
--- /dev/null
+++ b/m4/ax_prog_java.m4
@@ -0,0 +1,115 @@
+# ===========================================================================
+#       http://www.gnu.org/software/autoconf-archive/ax_prog_java.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PROG_JAVA
+#
+# DESCRIPTION
+#
+#   Here is a summary of the main macros:
+#
+#   AX_PROG_JAVAC: finds a Java compiler.
+#
+#   AX_PROG_JAVA: finds a Java virtual machine.
+#
+#   AX_CHECK_CLASS: finds if we have the given class (beware of CLASSPATH!).
+#
+#   AX_CHECK_RQRD_CLASS: finds if we have the given class and stops
+#   otherwise.
+#
+#   AX_TRY_COMPILE_JAVA: attempt to compile user given source.
+#
+#   AX_TRY_RUN_JAVA: attempt to compile and run user given source.
+#
+#   AX_JAVA_OPTIONS: adds Java configure options.
+#
+#   AX_PROG_JAVA tests an existing Java virtual machine. It uses the
+#   environment variable JAVA then tests in sequence various common Java
+#   virtual machines. For political reasons, it starts with the free ones.
+#   You *must* call [AX_PROG_JAVAC] before.
+#
+#   If you want to force a specific VM:
+#
+#   - at the configure.in level, set JAVA=yourvm before calling AX_PROG_JAVA
+#
+#     (but after AC_INIT)
+#
+#   - at the configure level, setenv JAVA
+#
+#   You can use the JAVA variable in your Makefile.in, with @JAVA@.
+#
+#   *Warning*: its success or failure can depend on a proper setting of the
+#   CLASSPATH env. variable.
+#
+#   TODO: allow to exclude virtual machines (rationale: most Java programs
+#   cannot run with some VM like kaffe).
+#
+#   Note: This is part of the set of autoconf M4 macros for Java programs.
+#   It is VERY IMPORTANT that you download the whole set, some macros depend
+#   on other. Unfortunately, the autoconf archive does not support the
+#   concept of set of macros, so I had to break it for submission.
+#
+#   A Web page, with a link to the latest CVS snapshot is at
+#   <http://www.internatif.org/bortzmeyer/autoconf-Java/>.
+#
+#   This is a sample configure.in Process this file with autoconf to produce
+#   a configure script.
+#
+#     AC_INIT(UnTag.java)
+#
+#     dnl Checks for programs.
+#     AC_CHECK_CLASSPATH
+#     AX_PROG_JAVAC
+#     AX_PROG_JAVA
+#
+#     dnl Checks for classes
+#     AX_CHECK_RQRD_CLASS(org.xml.sax.Parser)
+#     AX_CHECK_RQRD_CLASS(com.jclark.xml.sax.Driver)
+#
+#     AC_OUTPUT(Makefile)
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation; either version 2 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 8
+
+AU_ALIAS([AC_PROG_JAVA], [AX_PROG_JAVA])
+AC_DEFUN([AX_PROG_JAVA],[
+if test x$JAVAPREFIX = x; then
+        test x$JAVA = x && AC_CHECK_PROGS(JAVA, kaffe java)
+else
+        test x$JAVA = x && AC_CHECK_PROGS(JAVA, kaffe java, $JAVAPREFIX)
+fi
+test x$JAVA = x && AC_MSG_ERROR([no acceptable Java virtual machine found in \$PATH])
+AX_PROG_JAVA_WORKS
+AC_PROVIDE([$0])dnl
+])
diff --git a/m4/ax_prog_java_cc.m4 b/m4/ax_prog_java_cc.m4
new file mode 100644
index 0000000..3df064f
--- /dev/null
+++ b/m4/ax_prog_java_cc.m4
@@ -0,0 +1,104 @@
+# ===========================================================================
+#      http://www.gnu.org/software/autoconf-archive/ax_prog_java_cc.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PROG_JAVA_CC
+#
+# DESCRIPTION
+#
+#   Finds the appropriate java compiler on your path. By preference the java
+#   compiler is gcj, then jikes then javac.
+#
+#   The macro can take one argument specifying a space separated list of
+#   java compiler names.
+#
+#   For example:
+#
+#     AX_PROG_JAVA_CC(javac, gcj)
+#
+#   The macro also sets the compiler options variable: JAVA_CC_OPTS to
+#   something sensible:
+#
+#    - for GCJ it sets it to: @GCJ_OPTS@
+#      (if GCJ_OPTS is not yet defined then it is set to "-C")
+#
+#    - no other compiler has applicable options yet
+#
+#   Here's an example configure.in:
+#
+#     AC_INIT(Makefile.in)
+#     AX_PROG_JAVA_CC()
+#     AC_OUTPUT(Makefile)
+#     dnl End.
+#
+#   And here's the start of the Makefile.in:
+#
+#     PROJECT_ROOT      := @srcdir@
+#     # Tool definitions.
+#     JAVAC             := @JAVA_CC@
+#     JAVAC_OPTS        := @JAVA_CC_OPTS@
+#     JAR_TOOL          := @jar_tool@
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Nic Ferrier <nferrier@tapsellferrier.co.uk>
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation; either version 2 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 4
+
+# AX_PROG_JAVA_CC([COMPILER ...])
+# --------------------------
+# COMPILER ... is a space separated list of java compilers to search for.
+# This just gives the user an opportunity to specify an alternative
+# search list for the java compiler.
+AU_ALIAS([AC_PROG_JAVA_CC], [AX_PROG_JAVA_CC])
+AC_DEFUN([AX_PROG_JAVA_CC],
+[AC_ARG_VAR([JAVA_CC],                [java compiler command])dnl
+AC_ARG_VAR([JAVA_CC_FLAGS],           [java compiler flags])dnl
+m4_ifval([$1],
+      [AC_CHECK_TOOLS(JAVA_CC, [$1])],
+[AC_CHECK_TOOL(JAVA_CC, gcj)
+if test -z "$JAVA_CC"; then
+  AC_CHECK_TOOL(JAVA_CC, javac)
+fi
+if test -z "$JAVA_CC"; then
+  AC_CHECK_TOOL(JAVA_CC, jikes)
+fi
+])
+
+if test "$JAVA_CC" = "gcj"; then
+   if test "$GCJ_OPTS" = ""; then
+      AC_SUBST(GCJ_OPTS,-C)
+   fi
+   AC_SUBST(JAVA_CC_OPTS, @GCJ_OPTS@,
+        [Define the compilation options for GCJ])
+fi
+test -z "$JAVA_CC" && AC_MSG_ERROR([no acceptable java compiler found in \$PATH])
+])# AX_PROG_JAVA_CC
diff --git a/m4/ax_prog_java_works.m4 b/m4/ax_prog_java_works.m4
new file mode 100644
index 0000000..741bd56
--- /dev/null
+++ b/m4/ax_prog_java_works.m4
@@ -0,0 +1,134 @@
+# ===========================================================================
+#    http://www.gnu.org/software/autoconf-archive/ax_prog_java_works.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PROG_JAVA_WORKS
+#
+# DESCRIPTION
+#
+#   Internal use ONLY.
+#
+#   Note: This is part of the set of autoconf M4 macros for Java programs.
+#   It is VERY IMPORTANT that you download the whole set, some macros depend
+#   on other. Unfortunately, the autoconf archive does not support the
+#   concept of set of macros, so I had to break it for submission. The
+#   general documentation, as well as the sample configure.in, is included
+#   in the AX_PROG_JAVA macro.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation; either version 2 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 8
+
+AU_ALIAS([AC_PROG_JAVA_WORKS], [AX_PROG_JAVA_WORKS])
+AC_DEFUN([AX_PROG_JAVA_WORKS], [
+AC_PATH_PROG(UUDECODE, uudecode, [no])
+if test x$UUDECODE != xno; then
+AC_CACHE_CHECK([if uudecode can decode base 64 file], ac_cv_prog_uudecode_base64, [
+dnl /**
+dnl  * Test.java: used to test if java compiler works.
+dnl  */
+dnl public class Test
+dnl {
+dnl
+dnl public static void
+dnl main( String[] argv )
+dnl {
+dnl     System.exit (0);
+dnl }
+dnl
+dnl }
+cat << \EOF > Test.uue
+begin-base64 644 Test.class
+yv66vgADAC0AFQcAAgEABFRlc3QHAAQBABBqYXZhL2xhbmcvT2JqZWN0AQAE
+bWFpbgEAFihbTGphdmEvbGFuZy9TdHJpbmc7KVYBAARDb2RlAQAPTGluZU51
+bWJlclRhYmxlDAAKAAsBAARleGl0AQAEKEkpVgoADQAJBwAOAQAQamF2YS9s
+YW5nL1N5c3RlbQEABjxpbml0PgEAAygpVgwADwAQCgADABEBAApTb3VyY2VG
+aWxlAQAJVGVzdC5qYXZhACEAAQADAAAAAAACAAkABQAGAAEABwAAACEAAQAB
+AAAABQO4AAyxAAAAAQAIAAAACgACAAAACgAEAAsAAQAPABAAAQAHAAAAIQAB
+AAEAAAAFKrcAErEAAAABAAgAAAAKAAIAAAAEAAQABAABABMAAAACABQ=
+====
+EOF
+if $UUDECODE Test.uue; then
+        ac_cv_prog_uudecode_base64=yes
+else
+        echo "configure: __oline__: uudecode had trouble decoding base 64 file 'Test.uue'" >&AS_MESSAGE_LOG_FD
+        echo "configure: failed file was:" >&AS_MESSAGE_LOG_FD
+        cat Test.uue >&AS_MESSAGE_LOG_FD
+        ac_cv_prog_uudecode_base64=no
+fi
+rm -f Test.uue])
+fi
+if test x$ac_cv_prog_uudecode_base64 != xyes; then
+        rm -f Test.class
+        AC_MSG_WARN([I have to compile Test.class from scratch])
+        if test x$ac_cv_prog_javac_works = xno; then
+                AC_MSG_ERROR([Cannot compile java source. $JAVAC does not work properly])
+        fi
+        if test x$ac_cv_prog_javac_works = x; then
+                AX_PROG_JAVAC
+        fi
+fi
+AC_CACHE_CHECK(if $JAVA works, ac_cv_prog_java_works, [
+JAVA_TEST=Test.java
+CLASS_TEST=Test.class
+TEST=Test
+changequote(, )dnl
+cat << \EOF > $JAVA_TEST
+/* [#]line __oline__ "configure" */
+public class Test {
+public static void main (String args[]) {
+        System.exit (0);
+} }
+EOF
+changequote([, ])dnl
+if test x$ac_cv_prog_uudecode_base64 != xyes; then
+        if AC_TRY_COMMAND($JAVAC $JAVACFLAGS $JAVA_TEST) && test -s $CLASS_TEST; then
+                :
+        else
+          echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
+          cat $JAVA_TEST >&AS_MESSAGE_LOG_FD
+          AC_MSG_ERROR(The Java compiler $JAVAC failed (see config.log, check the CLASSPATH?))
+        fi
+fi
+if AC_TRY_COMMAND($JAVA $JAVAFLAGS $TEST) >/dev/null 2>&1; then
+  ac_cv_prog_java_works=yes
+else
+  echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
+  cat $JAVA_TEST >&AS_MESSAGE_LOG_FD
+  AC_MSG_ERROR(The Java VM $JAVA failed (see config.log, check the CLASSPATH?))
+fi
+rm -fr $JAVA_TEST $CLASS_TEST Test.uue
+])
+AC_PROVIDE([$0])dnl
+]
+)
diff --git a/m4/ax_prog_javac.m4 b/m4/ax_prog_javac.m4
new file mode 100644
index 0000000..d9bcc2d
--- /dev/null
+++ b/m4/ax_prog_javac.m4
@@ -0,0 +1,79 @@
+# ===========================================================================
+#       http://www.gnu.org/software/autoconf-archive/ax_prog_javac.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PROG_JAVAC
+#
+# DESCRIPTION
+#
+#   AX_PROG_JAVAC tests an existing Java compiler. It uses the environment
+#   variable JAVAC then tests in sequence various common Java compilers. For
+#   political reasons, it starts with the free ones.
+#
+#   If you want to force a specific compiler:
+#
+#   - at the configure.in level, set JAVAC=yourcompiler before calling
+#   AX_PROG_JAVAC
+#
+#   - at the configure level, setenv JAVAC
+#
+#   You can use the JAVAC variable in your Makefile.in, with @JAVAC@.
+#
+#   *Warning*: its success or failure can depend on a proper setting of the
+#   CLASSPATH env. variable.
+#
+#   TODO: allow to exclude compilers (rationale: most Java programs cannot
+#   compile with some compilers like guavac).
+#
+#   Note: This is part of the set of autoconf M4 macros for Java programs.
+#   It is VERY IMPORTANT that you download the whole set, some macros depend
+#   on other. Unfortunately, the autoconf archive does not support the
+#   concept of set of macros, so I had to break it for submission. The
+#   general documentation, as well as the sample configure.in, is included
+#   in the AX_PROG_JAVA macro.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation; either version 2 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 6
+
+AU_ALIAS([AC_PROG_JAVAC], [AX_PROG_JAVAC])
+AC_DEFUN([AX_PROG_JAVAC],[
+if test "x$JAVAPREFIX" = x; then
+        test "x$JAVAC" = x && AC_CHECK_PROGS(JAVAC, "gcj -C" guavac jikes javac)
+else
+        test "x$JAVAC" = x && AC_CHECK_PROGS(JAVAC, "gcj -C" guavac jikes javac, $JAVAPREFIX)
+fi
+test "x$JAVAC" = x && AC_MSG_ERROR([no acceptable Java compiler found in \$PATH])
+AX_PROG_JAVAC_WORKS
+AC_PROVIDE([$0])dnl
+])
diff --git a/m4/ax_prog_javac_works.m4 b/m4/ax_prog_javac_works.m4
new file mode 100644
index 0000000..7dfa1e3
--- /dev/null
+++ b/m4/ax_prog_javac_works.m4
@@ -0,0 +1,72 @@
+# ===========================================================================
+#    http://www.gnu.org/software/autoconf-archive/ax_prog_javac_works.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PROG_JAVAC_WORKS
+#
+# DESCRIPTION
+#
+#   Internal use ONLY.
+#
+#   Note: This is part of the set of autoconf M4 macros for Java programs.
+#   It is VERY IMPORTANT that you download the whole set, some macros depend
+#   on other. Unfortunately, the autoconf archive does not support the
+#   concept of set of macros, so I had to break it for submission. The
+#   general documentation, as well as the sample configure.in, is included
+#   in the AX_PROG_JAVA macro.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Stephane Bortzmeyer <bortzmeyer@pasteur.fr>
+#
+#   This program is free software; you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation; either version 2 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 6
+
+AU_ALIAS([AC_PROG_JAVAC_WORKS], [AX_PROG_JAVAC_WORKS])
+AC_DEFUN([AX_PROG_JAVAC_WORKS],[
+AC_CACHE_CHECK([if $JAVAC works], ac_cv_prog_javac_works, [
+JAVA_TEST=Test.java
+CLASS_TEST=Test.class
+cat << \EOF > $JAVA_TEST
+/* [#]line __oline__ "configure" */
+public class Test {
+}
+EOF
+if AC_TRY_COMMAND($JAVAC $JAVACFLAGS $JAVA_TEST) >/dev/null 2>&1; then
+  ac_cv_prog_javac_works=yes
+else
+  AC_MSG_ERROR([The Java compiler $JAVAC failed (see config.log, check the CLASSPATH?)])
+  echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
+  cat $JAVA_TEST >&AS_MESSAGE_LOG_FD
+fi
+rm -f $JAVA_TEST $CLASS_TEST
+])
+AC_PROVIDE([$0])dnl
+])
diff --git a/m4/ax_prog_javadoc.m4 b/m4/ax_prog_javadoc.m4
new file mode 100644
index 0000000..508375d
--- /dev/null
+++ b/m4/ax_prog_javadoc.m4
@@ -0,0 +1,52 @@
+# ===========================================================================
+#      http://www.gnu.org/software/autoconf-archive/ax_prog_javadoc.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PROG_JAVADOC
+#
+# DESCRIPTION
+#
+#   AX_PROG_JAVADOC tests for an existing javadoc generator. It uses the
+#   environment variable JAVADOC then tests in sequence various common
+#   javadoc generator.
+#
+#   If you want to force a specific compiler:
+#
+#   - at the configure.in level, set JAVADOC=yourgenerator before calling
+#   AX_PROG_JAVADOC
+#
+#   - at the configure level, setenv JAVADOC
+#
+#   You can use the JAVADOC variable in your Makefile.in, with @JAVADOC@.
+#
+#   Note: This macro depends on the autoconf M4 macros for Java programs. It
+#   is VERY IMPORTANT that you download that whole set, some macros depend
+#   on other. Unfortunately, the autoconf archive does not support the
+#   concept of set of macros, so I had to break it for submission.
+#
+#   The general documentation of those macros, as well as the sample
+#   configure.in, is included in the AX_PROG_JAVA macro.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Egon Willighagen <e.willighagen@science.ru.nl>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 7
+
+AU_ALIAS([AC_PROG_JAVADOC], [AX_PROG_JAVADOC])
+AC_DEFUN([AX_PROG_JAVADOC],[
+if test "x$JAVAPREFIX" = x; then
+        test "x$JAVADOC" = x && AC_CHECK_PROGS(JAVADOC, javadoc)
+else
+        test "x$JAVADOC" = x && AC_CHECK_PROGS(JAVADOC, javadoc, $JAVAPREFIX)
+fi
+test "x$JAVADOC" = x && AC_MSG_ERROR([no acceptable javadoc generator found in \$PATH])
+AC_PROVIDE([$0])dnl
+])
diff --git a/m4/ax_prog_javah.m4 b/m4/ax_prog_javah.m4
new file mode 100644
index 0000000..7afe410
--- /dev/null
+++ b/m4/ax_prog_javah.m4
@@ -0,0 +1,43 @@
+# ===========================================================================
+#       http://www.gnu.org/software/autoconf-archive/ax_prog_javah.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_PROG_JAVAH
+#
+# DESCRIPTION
+#
+#   AX_PROG_JAVAH tests the availability of the javah header generator and
+#   looks for the jni.h header file. If available, JAVAH is set to the full
+#   path of javah and CPPFLAGS is updated accordingly.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Luc Maisonobe <luc@spaceroots.org>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 5
+
+AU_ALIAS([AC_PROG_JAVAH], [AX_PROG_JAVAH])
+AC_DEFUN([AX_PROG_JAVAH],[
+AC_REQUIRE([AC_CANONICAL_SYSTEM])dnl
+AC_REQUIRE([AC_PROG_CPP])dnl
+AC_PATH_PROG(JAVAH,javah)
+if test x"`eval 'echo $ac_cv_path_JAVAH'`" != x ; then
+  AC_TRY_CPP([#include <jni.h>],,[
+    ac_save_CPPFLAGS="$CPPFLAGS"
+changequote(, )dnl
+    ac_dir=`echo $ac_cv_path_JAVAH | sed 's,\(.*\)/[^/]*/[^/]*$,\1/include,'`
+    ac_machdep=`echo $build_os | sed 's,[-0-9].*,,' | sed 's,cygwin,win32,'`
+changequote([, ])dnl
+    CPPFLAGS="$ac_save_CPPFLAGS -I$ac_dir -I$ac_dir/$ac_machdep"
+    AC_TRY_CPP([#include <jni.h>],
+               ac_save_CPPFLAGS="$CPPFLAGS",
+               AC_MSG_WARN([unable to include <jni.h>]))
+    CPPFLAGS="$ac_save_CPPFLAGS"])
+fi])
diff --git a/m4/ax_try_compile_java.m4 b/m4/ax_try_compile_java.m4
new file mode 100644
index 0000000..8efd091
--- /dev/null
+++ b/m4/ax_try_compile_java.m4
@@ -0,0 +1,55 @@
+# ===========================================================================
+#    http://www.gnu.org/software/autoconf-archive/ax_try_compile_java.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_TRY_COMPILE_JAVA
+#
+# DESCRIPTION
+#
+#   AX_TRY_COMPILE_JAVA attempt to compile user given source.
+#
+#   *Warning*: its success or failure can depend on a proper setting of the
+#   CLASSPATH env. variable.
+#
+#   Note: This is part of the set of autoconf M4 macros for Java programs.
+#   It is VERY IMPORTANT that you download the whole set, some macros depend
+#   on other. Unfortunately, the autoconf archive does not support the
+#   concept of set of macros, so I had to break it for submission. The
+#   general documentation, as well as the sample configure.in, is included
+#   in the AX_PROG_JAVA macro.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Devin Weaver <ktohg@tritarget.com>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 7
+
+AU_ALIAS([AC_TRY_COMPILE_JAVA], [AX_TRY_COMPILE_JAVA])
+AC_DEFUN([AX_TRY_COMPILE_JAVA],[
+AC_REQUIRE([AX_PROG_JAVAC])dnl
+cat << \EOF > Test.java
+/* [#]line __oline__ "configure" */
+ifelse([$1], , , [import $1;])
+public class Test {
+[$2]
+}
+EOF
+if AC_TRY_COMMAND($JAVAC $JAVACFLAGS Test.java) && test -s Test.class
+then
+dnl Don't remove the temporary files here, so they can be examined.
+  ifelse([$3], , :, [$3])
+else
+  echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
+  cat Test.java >&AS_MESSAGE_LOG_FD
+ifelse([$4], , , [  rm -fr Test*
+  $4
+])dnl
+fi
+rm -fr Test*])
diff --git a/m4/ax_try_run_java.m4 b/m4/ax_try_run_java.m4
new file mode 100644
index 0000000..80ec934
--- /dev/null
+++ b/m4/ax_try_run_java.m4
@@ -0,0 +1,56 @@
+# ===========================================================================
+#      http://www.gnu.org/software/autoconf-archive/ax_try_run_java.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_TRY_RUN_JAVA
+#
+# DESCRIPTION
+#
+#   AX_TRY_RUN_JAVA attempt to compile and run user given source.
+#
+#   *Warning*: its success or failure can depend on a proper setting of the
+#   CLASSPATH env. variable.
+#
+#   Note: This is part of the set of autoconf M4 macros for Java programs.
+#   It is VERY IMPORTANT that you download the whole set, some macros depend
+#   on other. Unfortunately, the autoconf archive does not support the
+#   concept of set of macros, so I had to break it for submission. The
+#   general documentation, as well as the sample configure.in, is included
+#   in the AX_PROG_JAVA macro.
+#
+# LICENSE
+#
+#   Copyright (c) 2008 Devin Weaver <ktohg@tritarget.com>
+#
+#   Copying and distribution of this file, with or without modification, are
+#   permitted in any medium without royalty provided the copyright notice
+#   and this notice are preserved. This file is offered as-is, without any
+#   warranty.
+
+#serial 1
+
+AU_ALIAS([AC_TRY_RUN_JAVA], [AX_TRY_RUN_JAVA])
+AC_DEFUN([AX_TRY_RUN_JAVA],[
+AC_REQUIRE([AX_PROG_JAVAC])dnl
+AC_REQUIRE([AX_PROG_JAVA])dnl
+cat << \EOF > Test.java
+/* [#]line __oline__ "configure" */
+ifelse([$1], , , [include $1;])
+public class Test {
+[$2]
+}
+EOF
+if AC_TRY_COMMAND($JAVAC $JAVACFLAGS Test.java) && test -s Test.class && ($JAVA $JAVAFLAGS Test; exit) 2>/dev/null
+then
+dnl Don't remove the temporary files here, so they can be examined.
+  ifelse([$3], , :, [$3])
+else
+  echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
+  cat Test.java >&AS_MESSAGE_LOG_FD
+ifelse([$4], , , [  rm -fr Test*
+  $4
+])dnl
+fi
+rm -fr Test*])