Hi I am following below link to enable voice call by using Kamailio Ims https://open5gs.org/open5gs/docs/tutorial/02-VoLTE-setup/ I have Clone the Kamailio repository and checkout 5.3 version of repository $ mkdir -p /usr/local/src/ $ cd /usr/local/src/ $ git clone https://github.com/herlesupreeth/kamailio $ cd kamailio $ git checkout -b 5.3 origin/5.3 and Generate build config files $ cd /usr/local/src/kamailio $ make cfg while doing make command i am getting below error. kamailio$ sudo make cfg make -C src/ cfg make[1]: Entering directory '/usr/local/src/kamailio/src' target architecture <x86_64>, host architecture <x86_64> Makefile.defs:1052: You are using an old and unsupported gcc version (1.3.0), compile at your own risk! making config... rm -f modules.lst make --no-print-directory modules.lst saving modules list... make[1]: Leaving directory '/usr/local/src/kamailio/src' my gcc version is $ gcc --version gcc (Ubuntu 11.3.0-1ubuntu1~22.04) 11.3.0 Copyright (C) 2021 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Please help me to resolve the issue -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/3463 You are receiving this because you are subscribed to this thread. Message ID: &lt;kamailio/kamailio/issues/3463(a)github.com&gt;