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dnl Available from the GNU Autoconf Macro Archive at:
dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_prog_java_works.html
dnl
AC_DEFUN_ONCE([AC_PROG_JAVA_WORKS], [
AC_REQUIRE([AC_PROG_JAVA])
AC_CHECK_PROG(uudecode, uudecode$EXEEXT, yes)
if test x$uudecode = xyes; 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$EXEEXT Test.uue; then
        ac_cv_prog_uudecode_base64=yes
else
        echo "configure: __oline__: uudecode had trouble decoding base 64 file 'Test.uue'" >&AC_FD_CC
        echo "configure: failed file was:" >&AC_FD_CC
        cat Test.uue >&AC_FD_CC
        ac_cv_prog_uudecode_base64=no
fi
rm -f Test.uue])
fi
if test x$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
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
   	AC_REQUIRE([AC_PROG_JAVAC_WORKS])
        if AC_TRY_COMMAND($JAVAC $JAVACFLAGS $JAVA_TEST) && test -s $CLASS_TEST; then
                :
        else
          echo "configure: failed program was:" >&AC_FD_CC
          cat $JAVA_TEST >&AC_FD_CC
          AC_MSG_ERROR(The Java compiler $JAVAC failed (see config.log, check the CLASSPATH?))
        fi
fi
if AC_TRY_COMMAND(CLASSPATH=.:$CLASSPATH $JAVA $JAVAFLAGS $TEST) >/dev/null 2>&1; then
  ac_cv_prog_java_works=yes
else
  echo "configure: failed program was:" >&AC_FD_CC
  cat $JAVA_TEST >&AC_FD_CC
  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
]
)
dnl Available from the GNU Autoconf Macro Archive at:
dnl http://www.gnu.org/software/ac-archive/htmldoc/ac_try_compile_java.html
dnl
AC_DEFUN_ONCE([AC_TRY_COMPILE_JAVA],[
AC_REQUIRE([AC_PROG_JAVAC_WORKS])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:" >&AC_FD_CC
  cat Test.java >&AC_FD_CC
ifelse([$4], , , [  rm -fr Test*
  $4
])dnl
fi
rm -fr Test*])