Index: share/mk/bsd.cpu.mk
===================================================================
--- share/mk/bsd.cpu.mk	(revision 205390)
+++ share/mk/bsd.cpu.mk	(working copy)
@@ -53,10 +53,16 @@
 CPUTYPE = athlon-mp
 .  elif ${CPUTYPE} == "k7"
 CPUTYPE = athlon
+#XXX: compiling gcc with -march=native causes libc problems
+.  elif ${CPUTYPE} == "native"
+.error CPUTYPE native is not supported.
 .  endif
 . elif ${MACHINE_ARCH} == "amd64"
 .  if ${CPUTYPE} == "prescott" || ${CPUTYPE} == "core2"
 CPUTYPE = nocona
+#XXX: compiling gcc with -march=native causes libc problems
+.  elif ${CPUTYPE} == "native"
+.error CPUTYPE native is not supported.
 .  endif
 . endif