feat(ble): Add preprocessor check to determine enabled roles are valid

A number of BLE roles depend on each other, checking within the target
configuration file for a valid configuration is infeasible. Move the
validation to the preprocessor and fail to compile if some required
roles are not enabled.

features/FEATURE_BLE/ble/BLERoles.h

@@ -0,0 +1,44 @@
+#ifndef MBED_BLE_ROLES_H__
+#define MBED_BLE_ROLES_H__
+
+#ifdef BLE_ROLE_PERIPHERAL
+    #ifndef BLE_ROLE_OBSERVER
+        #error "BLE role 'PERIPHERAL' depends on role 'OBSERVER'"
+    #endif // BLE_ROLE_OBSERVER
+#endif // BLE_ROLE_PERIPHERAL
+
+#ifdef BLE_ROLE_CENTRAL
+    #ifndef BLE_ROLE_BROADCASTER
+        #error "BLE role 'CENTRAL' depends on role 'BROADCASTER'"
+    #endif // BLE_ROLE_BROADCASTER
+#endif // BLE_ROLE_CENTRAL
+
+#ifdef BLE_ROLE_SECURITY
+    #ifndef BLE_ROLE_PERIPHERAL
+        #error "BLE role 'SECURITY' depends on role 'PERIPHERAL'"
+    #endif // BLE_ROLE_PERIPHERAL
+#endif // BLE_ROLE_SECURITY
+
+#ifdef BLE_ROLE_PRIVACY
+    #ifndef BLE_ROLE_SECURITY
+        #error "BLE role 'PRIVACY' depends on role 'SECURITY'"
+    #endif // BLE_ROLE_SECURITY
+#endif // BLE_ROLE_PRIVACY
+
+#ifdef BLE_ROLE_GATT_CLIENT
+    #ifndef BLE_ROLE_PERIPHERAL
+        #error "BLE role 'GATT CLIENT' depends on role 'PERIPHERAL'"
+    #endif // BLE_ROLE_PERIPHERAL
+
+    #ifndef BLE_ROLE_BROADCASTER
+        #error "BLE role 'GATT CLIENT' depends on role 'BROADCASTER'"
+    #endif // BLE_ROLE_BROADCASTER
+#endif // BLE_ROLE_GATT_CLIENT
+
+#ifdef BLE_ROLE_GATT_SERVER
+    #ifndef BLE_ROLE_SECURITY
+        #error "BLE role 'GATT SERVER' depends on role 'SECURITY'"
+    #endif // BLE_ROLE_SECURITY
+#endif // BLE_ROLE_GATT_SERVER
+
+#endif // MBED_BLE_ROLES_H__