Add powerpc-unknown-linux.
HostVendor_CPP='apple'
HostOS_CPP='darwin'
;;
+powerpc-unknown-linux*)
+ HostPlatform=powerpc-unknown-linux
+ TargetPlatform=powerpc-unknown-linux
+ BuildPlatform=powerpc-unknown-linux
+ HostPlatform_CPP='powerpc_unknown_linux'
+ HostArch_CPP='powerpc'
+ HostVendor_CPP='unknown'
+ HostOS_CPP='linux'
+ ;;
sparc-sun-sunos4*)
HostPlatform=sparc-sun-sunos4
TargetPlatform=sparc-sun-sunos4 #hack