fixes for full-bandwidth testing in dlsim

cmake_targets/CMakeLists.txt

@@ -2652,6 +2652,7 @@ target_link_libraries(nr_ulschsim
 add_executable(nr_ulsim
   ${OPENAIR1_DIR}/SIMULATION/NR_PHY/ulsim.c
   ${OPENAIR_DIR}/common/utils/system.c
+  ${OPENAIR_DIR}/common/utils/nr/nr_common.c
   ${UTIL_SRC}
   ${T_SOURCE}
   ${SHLIB_LOADER_SOURCES}

cmake_targets/tools/build_helper

@@ -103,6 +103,7 @@ check_supported_distribution() {
         "fedora24")    return 0 ;;
         "rhel7")       return 0 ;;
 	"rhel7.6")     return 0 ;;
+        "rhel7.7")     return 0 ;;
         "centos7")     return 0 ;;
     esac
     return 1