do not compile full LTE L2 eNB in nr-softmodem (at the cost of a small dummy file)

CMakeLists.txt

@@ -1335,8 +1335,8 @@ if(E2_AGENT)
 endif()
 
 add_library(L2_LTE_NR
-  ${L2_RRC_SRC}
-  ${MAC_SRC}
+  # temporary solution until 4G/5G code completely untangled (as evidenced by deletion of the following file)
+  ${MAC_DIR}/dummy_functions.c
   ${ENB_APP_SRC}
 )
 

openair2/LAYER2/MAC/dummy_functions.c

@@ -0,0 +1,61 @@
+/*
+ * Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The OpenAirInterface Software Alliance licenses this file to You under
+ * the OAI Public License, Version 1.1  (the "License"); you may not use this file
+ * except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.openairinterface.org/?page_id=698
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *-------------------------------------------------------------------------------
+ * For more information about the OpenAirInterface (OAI) Software Alliance:
+ *      contact@openairinterface.org
+ */
+
+#include "openair2/LAYER2/MAC/mac_proto.h"
+
+// TODO temporary solution
+//      to be removed once separation between NR and LTE is achieved
+
+int sf_ahead = 4;
+SCHEDULER_MODES global_scheduler_mode;
+
+int rrc_mac_config_req_eNB(const module_id_t Mod_idP, const rrc_mac_config_req_eNB_t *param)
+{
+  return 0;
+}
+
+void mac_top_init_eNB(void)
+{
+}
+
+uint32_t to_earfcn_UL(int eutra_bandP, long long int ul_CarrierFreq, uint32_t bw)
+{
+  return 0;
+}
+
+int32_t get_uldl_offset(int nr_bandP) {
+  return 0;
+}
+
+IF_Module_t *IF_Module_init(int Mod_id)
+{
+  return NULL;
+}
+
+uint32_t from_earfcn(int eutra_bandP, uint32_t dl_earfcn)
+{
+  return 0;
+}
+
+uint32_t to_earfcn_DL(int eutra_bandP, long long int dl_CarrierFreq, uint32_t bw)
+{
+  return 0;
+}