This is because rsync expects $build_cpu to be x86_64 not amd64 https://git.samba.org/rsync.git/?p=rsync.git;a=blob;f=configure.ac;h=112367cb6cfe6c32c157d8a2d6606e1e33b64fff;hb=194cee671d5e178f20c4494f41911fa8db942935#l207 https://git.samba.org/rsync.git/?p=rsync.git;a=blob;f=configure.ac;h=112367cb6cfe6c32c157d8a2d6606e1e33b64fff;hb=194cee671d5e178f20c4494f41911fa8db942935#l279 This should be fixed, I tried to patch configure.ac and set USES= autoreconf however it brakes and wants you to run make reconfigure Best regards, Daniel
Bug report submitted upstream as it's not really a porting issue https://github.com/WayneD/rsync/issues/230