* java/proguard.conf: New file.

java/proguard.conf

@@ -0,0 +1,24 @@
+# Trivial Proguard configuration file
+#
+# Copyright (C) 2024 Free Software Foundation, Inc.
+#
+# This file is part of GNU Emacs.
+#
+# GNU Emacs 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 3 of the License, or
+# (at your option) any later version.
+#
+# GNU Emacs 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 GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.
+#
+# The effect of these two lines is to prevent the removal of symbol
+# names, which Emacs requires to link to functions defined in Java.
+
+-keep,allowoptimization interface	org.gnu.emacs.*
+-keep,allowoptimization class		org.gnu.emacs.* { <fields>; <methods>; }