Refactor linker/Android.bp for native-bridge

Define a "linker_bin_template" cc_defaults module that a native bridge
implementation can inherit to define a guest linker.

Break the debuggerd_init call off into separate
linker_debuggerd_{android,stub}.cpp files to allow opting in/out of the
debuggerd integration without needing to change how linker_main.cpp is
compiled. (This is necessary for a later commit that moves
linker_main.cpp into a new static library.)

Test: bionic unit tests
Bug: none
Change-Id: I7c5d79281bce1e69817b266dd91d43ea40f78522

1 files changed, 32 insertions, 0 deletions

diff --git a/linker/linker_debuggerd_stub.cpp b/linker/linker_debuggerd_stub.cpp
new file mode 100644
index 000000000..631e6e48b
--- /dev/null
+++ b/linker/linker_debuggerd_stub.cpp
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include "linker_debuggerd.h"
+
+void linker_debuggerd_init() {
+}