### Description Currently, an undefined environmental variable with `#!defenv` results in Kamailio failing to start. The proposal here that if the environmental variable is not defined, then the macro value would be undefined as well. For example: ``` !#KAMAILIO loadmodule "xlog" loadmodule "pv" #!defenv FOO request_route { #!ifdef FOO xlog("L_INFO","Environmental variable $$FOO is set\n"); #!else xlog("L_WARN","Environmental variable $$FOO is NOT set\n"); #!endif forward(); } ``` Currently this configuration will fail to load if environmental variable is not set. My proposal is to either allow `#!envdef` to accept an undefined environmental variable and have the preprocessor macro undefined, or to add a new keyword (`#!envdefn` perhaps?) to allow this behavior. -- You are receiving this because you are subscribed to this thread. Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/2967