The following kludge is present in toolchain.eclass, in toolchain_pkg_pretend():
[[ -z ${UCLIBC_VER} ]] && [[ ${CTARGET} == *-uclibc* ]] && \ die "Sorry, this version does not support uClibc" The below patch removes this. I've been running a gcc-6-built, sys-libs/uclibc-ng in chroot for some time now, have completed several catalyst runs, and am at the tail end of a fresh install of a sys-libs/uclibc-ng userland on actual MIPS hardware. Signed-off-by: Joshua Kinard <ku...@gentoo.org> --- eclass/toolchain.eclass | 3 --- 1 file changed, 3 deletions(-) --- a/eclass/toolchain.eclass.orig 2017-07-29 19:06:30.894211203 -0400 +++ b/eclass/toolchain.eclass 2017-07-29 19:06:40.514211133 -0400 @@ -375,9 +375,6 @@ toolchain_pkg_pretend() { "in your make.conf if you want to use this version." fi - [[ -z ${UCLIBC_VER} ]] && [[ ${CTARGET} == *-uclibc* ]] && \ - die "Sorry, this version does not support uClibc" - if ! use_if_iuse cxx ; then use_if_iuse go && ewarn 'Go requires a C++ compiler, disabled due to USE="-cxx"' use_if_iuse objc++ && ewarn 'Obj-C++ requires a C++ compiler, disabled due to USE="-cxx"'