8346394: Bundled freetype library needs to have JNI_OnLoad for static builds

Reviewed-by: erikj, prr

Author: magicus

make/modules/java.desktop/lib/ClientLibraries.gmk

@@ -283,7 +283,7 @@ ifeq ($(FREETYPE_TO_USE), bundled)
       OPTIMIZATION := HIGHEST, \
       CFLAGS := -DFT2_BUILD_LIBRARY, \
       CFLAGS_windows := -DDLL_EXPORT, \
-      EXTRA_HEADER_DIRS := libfreetype/include, \
+      EXTRA_HEADER_DIRS := java.base:libjava libfreetype/include, \
       DISABLED_WARNINGS_microsoft := 4267 4244 4996, \
       DISABLED_WARNINGS_gcc := dangling-pointer stringop-overflow, \
   ))

src/java.desktop/share/native/libfreetype/java_freetype.c

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include "jni_util.h"
+
+/*
+ * This is needed to mark the bundled freetype library as being part of the JDK,
+ * which means that for static builds, no additional dynamic library needs to
+ * be loaded by System.loadLibrary("freetype").
+ */
+DEF_STATIC_JNI_OnLoad