Created attachment 429042 [details] output of emerge --info I am unable to build media-libs/libcdr-0.1.2-r1; it fails with the message "recipe for target cmx2raw failed".
Created attachment 429046 [details] build log
Created attachment 429048 [details] emerge -pqv
Problem solved by changing gcc to version x86_64-pc-linux-gnu-5.3.0 from x86_64-pc-linux-gnu-4.9.3