gn-build: Add bluetooth-service target
This patch makes the Bluetooth system service (service/) buildable using GN:
1. Added new BUILD.gn file for service/
2. Added conditional compilation for global config paths, with TODOs for
generalizing them later.
3. Added a shim for loading the Bluetooth library that calls hw_get_module on
Android and explicitly calls dlopen on OS_GENERIC.
4. Fixed compile warnings and errors.
5. Did some minor clean up in gatt_server.cpp for better readability.
Bug: 22124644
Change-Id: I3226537a3a5211a6762651a35707638df29956b0
diff --git a/main/bte_main.c b/main/bte_main.c
index f165f52..ba8b172 100644
--- a/main/bte_main.c
+++ b/main/bte_main.c
@@ -62,8 +62,13 @@
/* Run-time configuration file for BLE*/
#ifndef BTE_BLE_STACK_CONF_FILE
+// TODO(armansito): Find a better way than searching by a hardcoded path.
+#if defined(OS_GENERIC)
+#define BTE_BLE_STACK_CONF_FILE "ble_stack.conf"
+#else // !defined(OS_GENERIC)
#define BTE_BLE_STACK_CONF_FILE "/etc/bluetooth/ble_stack.conf"
-#endif
+#endif // defined(OS_GENERIC)
+#endif // BT_BLE_STACK_CONF_FILE
/******************************************************************************
** Variables