"scanelf -n" shows that none of the binaries actually depends on libstdc++.so.5: TYPE NEEDED FILE ET_EXEC libc.so.6 bin/dumpobj ET_EXEC libpthread.so.0,libm.so.6,libc.so.6,ld-linux.so.2 bin/rdmd ET_EXEC libstdc++.so.6,libc.so.6,libm.so.6 bin/dmd ET_EXEC libc.so.6 bin/obj2asm So both app-emulation/emul-linux-x86-compat and virtual/libstdc++ can be removed from RDEPEND.
Fixed.