diff -Naur yasm2227/config/config.sub mpiryasm/config/config.sub
--- yasm2227/config/config.sub	2010-06-25 12:59:22.000000000 +0100
+++ mpiryasm/config/config.sub	2010-06-25 13:00:42.000000000 +0100
@@ -1073,7 +1073,7 @@
 	pmac | pmac-mpw)
 		basic_machine=powerpc-apple
 		;;
-	*-unknown)
+	*-unknown | *-pc)
 		# Make sure to match an already-canonicalized machine name.
 		;;
 	*)
diff -Naur yasm2227/configure.ac mpiryasm/configure.ac
--- yasm2227/configure.ac	2010-06-25 12:59:23.000000000 +0100
+++ mpiryasm/configure.ac	2010-06-25 13:00:42.000000000 +0100
@@ -20,6 +20,22 @@
 #
 # autoconf command-line options
 #
+AC_ARG_ENABLE(assert,,,)
+
+AC_ARG_ENABLE(alloca,,,)
+
+AC_ARG_ENABLE(cxx,,,)
+
+AC_ARG_ENABLE(fft,,,)
+
+AC_ARG_ENABLE(nails,,,)
+
+AC_ARG_ENABLE(gmpcompat,,,)
+
+AC_ARG_WITH(readline,,,)
+
+AC_ARG_ENABLE(fat,,,)
+
 AC_ARG_ENABLE(debug,
 AC_HELP_STRING([--enable-debug],
 	       [Turn on debugging and compile time warnings]),