[gentoo-dev] [RFC] New global USE flag: unwind

["Chí-Thanh Christopher Nguyễn" <chithanh@gentoo.org>]

Suggested description: Add support for stack traces and function name 
resolution via sys-libs/libunwind

That description is a little unwieldy though, better suggestions are 
welcome.

Currently in use by the following packages:

dev-cpp/glog:unwind - Use sys-libs/libunwind for stack unwinding instead 
of glibc/gcc (may be more reliable on x86_64)
dev-libs/efl:unwind - Enable debug support via sys-libs/libunwind
dev-libs/weston:unwind - Enable libunwind usage for backtraces
dev-util/ltrace:unwind - Use sys-libs/libunwind for frame unwinding support
dev-util/perf:unwind - Use sys-libs/libunwind for frame unwinding support.
dev-util/strace:unwind - Enable stack backtraces (-k flag) via 
sys-libs/libunwind
media-libs/gstreamer:unwind - Enable sys-libs/libunwind usage for better 
backtrace support in leaks tracer module
www-apache/mod_backtrace:unwind - Use sys-libs/libunwind to provide 
better resolution of function names.
x11-apps/intel-gpu-tools:unwind - Provide automatic stack traces on test 
failures
x11-base/xorg-server:unwind - Enable libunwind usage for backtraces

I understand that dev-cpp/glog uses the unwind flag differently from the 
other packages. If that is an issue that package's flag could be renamed 
to "libunwind" as sys-libs/libcxx et al. currently use.

Best regards,
Chí-Thanh Christopher Nguyễn