The sox ebuild does: From config.log: /usr/bin/uname -p = AMD Athlon(tm) 64 X2 Dual Core Processor 6000+ /bin/uname -X = unknown /bin/arch = unknown /usr/bin/arch -k = unknown /usr/convex/getsysinfo = unknown /usr/bin/hostinfo = unknown /bin/machine = unknown /usr/bin/oslevel = unknown /bin/universe = unknown arch is in /usr/bin/arch, and there is no -k option. Which of these is expected to work with gentoo? The build fails because arch is unknown.
This bug report is pilot error. gcc was not moved over.