--- gcc-4.9.4.old/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ gcc-4.9.4/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -116,6 +116,9 @@
 #include <sys/sockio.h>
 #endif
 
+#define SCSI_IOCTL_TAGGED_ENABLE  0x5383
+#define SCSI_IOCTL_TAGGED_DISABLE 0x5384
+
 namespace __sanitizer {
   unsigned struct_utsname_sz = sizeof(struct utsname);
   unsigned struct_stat_sz = sizeof(struct stat);