--- libsanitizer/sanitizer_common/sanitizer_linux.h.orig	2013-12-05 04:18:38.000000000 -0500
+++ libsanitizer/sanitizer_common/sanitizer_linux.h	2017-09-12 18:30:52.178616638 -0400
@@ -14,13 +14,13 @@
 #include "sanitizer_platform.h"
 #if SANITIZER_LINUX
 #include "sanitizer_common.h"
 #include "sanitizer_internal_defs.h"
 #include "sanitizer_platform_limits_posix.h"
+#include <sys/ucontext.h>
 
 struct link_map;  // Opaque type returned by dlopen().
-struct sigaltstack;
 
 namespace __sanitizer {
 // Dirent structure for getdents(). Note that this structure is different from
 // the one in <dirent.h>, which is used by readdir().
 struct linux_dirent;