[SR-Users] sctp on Centos 7

Hi, I would like to enable and use sctp in kamailio but I do not know exactly how to do it. It seems that documentation is a little bit inconsistent. 1. I have Centos 7 and kamailio installed from repositories. 2. I set loadmodule "sctp" in kamailio.cfg 3. I got this error: Jul 9 08:08:54 kamailio: : sctp [sctp_mod.c:99]: mod_register(): sctp core support not enabled Jul 9 08:08:54 kamailio: ERROR: <core> [sr_module.c:600]: load_module(): /usr/lib64/kamailio/modules/sctp.so: mod_register failed Jul 9 08:08:54 cw-aio kamailio: : <core> [cfg.y:3432]: yyerror_at(): parse error in config file /etc/kamailio_pcscf/kamailio.cfg, line 230, column 12-17: failed to load module 4. I checked mod_register() function and found out that USE_SCTP should be set. 5. kamailio -V did not show USE_SCTP 6. Next I tried to compile kamailio sources from 4.3 branch make include_modules="db_mysql tls sctp" SCTP=1 cfg make all 7. Still the same problem "mod_register(): sctp core support not enabled" 8. Then I added USE_SCTP to C_DEFS and compile again. This attempt was successfull. I was able to see USE_SCTP in kamailio -V output. Questions: 1. What is the right procedure to enable sctp in kamailio? 2. Why the -DUSE_SCTP was not used when SCTP=1 was used. According to documentation: "The core Makefile variable SCTP must be set to 1 (which is by default set to 1 in Makefile.defs) and sources compiled with -DUSE_SCTP (automatically set when SCTP=1). In other words, if core Makefiles are not changed and SCTP variable is not overwritten from command line, then the SCTP support in core is enabled." Regards, Peter