compiler-rt : Compiler runtime library for clang (built-in part) ( https://llvm.org/ )
compiler-rt-sanitizers : Compiler runtime libraries for clang (sanitizers and xray) ( https://llvm.org/ )
libcxx : New implementation of the C++ standard library, targeting C++11 ( https://libcxx.llvm.org/ )
libcxxabi : Low level support for a standard C++ library ( https://libcxxabi.llvm.org/ )
libunwind : C++ runtime stack unwinder from LLVM ( https://llvm.org/docs/ExceptionHandling.html )
openmp : OpenMP runtime library for LLVM/clang compiler ( https://openmp.llvm.org )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a gerislay
For Paludis use this rsync : rsync://gentoo.zugaina.org/gerislay-portage
If you have a problem : ycarus(-at-)zugaina.org