--- libsanitizer/asan/asan_linux.cc.orig	2013-01-23 06:41:33.000000000 -0500
+++ libsanitizer/asan/asan_linux.cc	2017-09-13 01:31:17.377100219 -0400
@@ -26,10 +26,11 @@
 #include <fcntl.h>
 #include <pthread.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <unwind.h>
+#include <signal.h>
 
 #if !ASAN_ANDROID
 // FIXME: where to get ucontext on Android?
 #include <sys/ucontext.h>
 #endif