1 files changed, 109 insertions, 0 deletions
diff --git a/libjava/classpath/m4/ac_prog_java_works.m4 b/libjava/classpath/m4/ac_prog_java_works.m4
new file mode 100644
index 00000000000..ffde1ffc4ab
--- /dev/null
+++ b/libjava/classpath/m4/ac_prog_java_works.m4
@@ -0,0 +1,109 @@
+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([AC_PROG_JAVA_WORKS], [
+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. $JAVAC does not work properly])
+        fi
+        if test x$ac_cv_prog_javac_works = x; then
+                AC_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:" >&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([AC_TRY_COMPILE_JAVA],[
+AC_REQUIRE([AC_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:" >&AC_FD_CC
+  cat Test.java >&AC_FD_CC
+ifelse([$4], , , [  rm -fr Test*
+  $4
+])dnl
+fi
+rm -fr Test*])