fix(build): fix compilation errors with newest version of g++

Signed-off-by: Raphael Defosseux <raphael.defosseux@openairinterface.org>

src/common/utils/3gpp_conversions.cpp

@@ -560,8 +560,8 @@ void xgpp_conv::smf_event_exposure_notification_from_openapi(
 void xgpp_conv::sm_context_request_from_nas(
     const nas_message_t& nas_msg,
     smf::pdu_session_create_sm_context_request& pcr) {
-  pdu_session_type_t pdu_session_type = {
-      .pdu_session_type = PDU_SESSION_TYPE_E_IPV4};
+  pdu_session_type_t pdu_session_type = {};
+  pdu_session_type.pdu_session_type   = PDU_SESSION_TYPE_E_IPV4;
   // Extended Protocol Discriminator
   pcr.set_epd(nas_msg.header.extended_protocol_discriminator);
   // Message Type

src/smf_app/smf_app.cpp

@@ -785,8 +785,8 @@ void smf_app::handle_pdu_session_create_sm_context_request(
   std::string n1_sm_message, n1_sm_message_hex;
   nas_message_t decoded_nas_msg       = {};
   cause_value_5gsm_e cause_n1         = {cause_value_5gsm_e::CAUSE_0_UNKNOWN};
-  pdu_session_type_t pdu_session_type = {
-      .pdu_session_type = PDU_SESSION_TYPE_E_IPV4};
+  pdu_session_type_t pdu_session_type = {};
+  pdu_session_type.pdu_session_type   = PDU_SESSION_TYPE_E_IPV4;
 
   // Step 1. Decode NAS and get the necessary information
   int decoder_rc = smf_n1::get_instance().decode_n1_sm_container(

src/smf_app/smf_context.cpp

@@ -310,7 +310,8 @@ void smf_pdu_session::remove_qos_flow(const pfcp::qfi_t& qfi) {
 //------------------------------------------------------------------------------
 void smf_pdu_session::remove_qos_flow(smf_qos_flow& flow) {
   std::unique_lock lock(m_pdu_session_mutex);
-  pfcp::qfi_t qfi = {.qfi = flow.qfi.qfi};
+  pfcp::qfi_t qfi = {};
+  qfi.qfi         = flow.qfi.qfi;
   flow.deallocate_ressources();
   qos_flows.erase(qfi.qfi);
 }
@@ -4306,7 +4307,8 @@ void smf_context::update_qos_info(
   uint16_t length_of_rule_ie = nas_msg.plain.sm.pdu_session_modification_request
                                    .qosrules.lengthofqosrulesie;
 
-  pfcp::qfi_t generated_qfi = {.qfi = 0};
+  pfcp::qfi_t generated_qfi{};
+  generated_qfi.qfi = 0;
 
   // QOSFlowDescriptions
   uint8_t number_of_flow_descriptions =

src/smf_app/smf_context.hpp

@@ -55,6 +55,8 @@ extern "C" {
 #include "nas_message.h"
 }
 
+using namespace boost::placeholders;
+
 namespace smf {
 
 class smf_qos_flow {