Created attachment 506252 [details] emerge --info emerging gcc-7.2.0 failed to build with error: checking host system type... configure: error: system bdw-gc required but not found
Created attachment 506254 [details] gcc-build-logs.tar.bz2
Assuming you're on a multilib system, add these lines to /etc/portage/package.use: dev-libs/libatomic_ops abi_x86_32 dev-libs/boehm-gc abi_x86_32 Then rebuild libatomic_ops and boehm-gc. The problem is boehm-gc is needed for objc-gc. It used to be bundled in gcc, but was removed in gcc 7.1. See the last few comments of https://bugs.gentoo.org/617788
Thanks, that works for me
*** This bug has been marked as a duplicate of bug 617788 ***