https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: app-backup/kup-0.8.0 fails to compile with compiler-rt. Discovered on: amd64 (internal ref: tinderbox)
Created attachment 662968 [details] build.log build log and emerge --info
Possible context of error(s): bupslave.cpp:(.text+0x12b): undefined reference to `_Unwind_Resume' bupslave.cpp:(.text+0x923): undefined reference to `_Unwind_Resume' bupslave.cpp:(.text+0x17fa): undefined reference to `_Unwind_Resume' bupslave.cpp:(.text+0x1eec): undefined reference to `_Unwind_Resume' bupslave.cpp:(.text+0x212c): undefined reference to `_Unwind_Resume' clang-10: error: linker command failed with exit code 1 (use -v to see invocation)
Patches welcome, I'm not going to invest time in this.
I'm unconvinced this isn't a local issue. Re-open when you reproduce it, and add emerge history when you do.