Index: gcc/config/arm/arm.h
--- gcc/config/arm/arm.h.orig
+++ gcc/config/arm/arm.h
@@ -2195,7 +2195,7 @@ extern const char *arm_target_thumb_only (int argc, co
 
 /* -mcpu=native handling only makes sense with compiler running on
    an ARM chip.  */
-#if defined(__arm__)
+#if defined(__arm__) && (defined(__linux__) || defined(__FreeBSD__))
 extern const char *host_detect_local_cpu (int argc, const char **argv);
 #define HAVE_LOCAL_CPU_DETECT
 # define MCPU_MTUNE_NATIVE_FUNCTIONS			\