Merge changes from topic 'multinetwork_vndk' into oc-dev

* changes:
  Allow vendor code to link to libandroid_net.
  Move libandroid_net from Android.mk to Android.bp.

native/android/Android.bp

@@ -19,3 +19,31 @@ ndk_library {
     first_version: "9",
     unversioned_until: "current",
 }
+
+cc_defaults {
+    name: "libandroid_defaults",
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wunused",
+        "-Wunreachable-code",
+    ],
+}
+
+// Network library.
+cc_library_shared {
+    name: "libandroid_net",
+    defaults: ["libandroid_defaults"],
+    srcs: ["net.c"],
+
+    shared_libs: ["libnetd_client"],
+
+    include_dirs: ["bionic/libc/dns/include"],
+}
+
+llndk_library {
+    name: "libandroid_net",
+    export_include_dirs: ["include"],
+    symbol_file: "libandroid_net.map.txt",
+    unversioned: true,
+}

native/android/Android.mk

@@ -58,20 +58,3 @@ LOCAL_MODULE := libandroid
 LOCAL_CFLAGS += $(common_cflags)
 
 include $(BUILD_SHARED_LIBRARY)
-
-# Network library.
-include $(CLEAR_VARS)
-LOCAL_MODULE := libandroid_net
-LOCAL_CFLAGS := $(common_cflags)
-LOCAL_SRC_FILES:= \
-    net.c \
-
-LOCAL_SHARED_LIBRARIES := \
-    libnetd_client \
-
-LOCAL_C_INCLUDES += \
-    frameworks/base/native/include \
-    bionic/libc/dns/include \
-    system/netd/include \
-
-include $(BUILD_SHARED_LIBRARY)

native/android/include/multinetwork.h

@@ -0,0 +1 @@
+../../../../native/include/android/multinetwork.h

native/android/libandroid_net.map.txt

@@ -0,0 +1,10 @@
+# These functions have been part of the NDK since API 24.
+# They are also all available to vendor code.
+LIBANDROID_NET {
+  global:
+    android_setsocknetwork; # vndk
+    android_setprocnetwork; # vndk
+    android_getaddrinfofornetwork; # vndk
+  local:
+    *;
+};