dev-util/strace
Useful diagnostic, instructional, and debugging tool
USE Flags
aio
Global: Enables support for Linux's Async IO
Local: Enable libaio support
perl
Global: Adds support/bindings for the Perl language
static
Global: !!do not set this during bootstrap!! Causes binaries to be statically linked instead of dynamically
unwind
* This flag is undocumented *
test
Global: Workaround to pull in packages needed to run with FEATURES=test. Portage-2.1.2 handles this internally, so don't set it in make.conf/package.use anymore
+perl
* This flag is undocumented *