+`NIT_NO_STACK`
+: Runtime control of stack traces.
+
+ By default, stack traces are printed when a runtime errors occurs during the execution of a compiled program.
+ When setting this environment variable to a non empty value, such stack traces are disabled.
+
+ The environment variable is used when programs are executed, not when they are compiled.
+ Thus, you do not need to recompile programs in order to disable generated stack traces.
+
+ Note that stack traces require that, during the compilation, development files of the library `libunwind` are available.
+ If they are not available, then programs are compiled without any stack trace support.
+
+ To completely disable stack traces, see the option `--no-stacktrace`.
+