dev-debug/ltrace
trace library calls made at runtime
USE Flags
debug
Global: Enable extra debug codepaths, like asserts and extra output. If you want to get meaningful backtraces see http://www.gentoo.org/proj/en/qa/backtraces.xml
elfutils
* This flag is undocumented *
selinux
Global: !!internal use only!! Security Enhanced Linux support, this must be set by the selinux profile or breakage will occur
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
unwind
* This flag is undocumented *