[m-rev.] diff: set explicit classpath in configure

[Peter Wang]

Branches: main

aclocal.m4:
        Set CLASSPATH=. when checking the Java interpreter works, in case the
        user is silly enough to have a CLASSPATH which doesn't contain the
        current directory.  The conftest.class file would not be found then.

diff --git a/aclocal.m4 b/aclocal.m4
index 5c6566e..6fc261e 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -382,7 +382,7 @@ EOF
 		echo "$JAVAC" conftest.java >&AC_FD_CC 2>&1 &&
 		"$JAVAC" conftest.java >&AC_FD_CC 2>&1 &&
 		echo "$JAVA_INTERPRETER" conftest > conftest.out 2>&AC_FD_CC &&
-		"$JAVA_INTERPRETER" conftest > conftest.out 2>&AC_FD_CC &&
+		CLASSPATH=. "$JAVA_INTERPRETER" conftest > conftest.out 2>&AC_FD_CC &&
 		test "`tr -d '\015' < conftest.out`" = "Hello, world"
 	then
 		mercury_cv_java="yes"

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