--- libsanitizer/asan/asan_linux.cc.orig	2013-12-05 04:18:38.000000000 -0500
+++ libsanitizer/asan/asan_linux.cc	2017-09-12 18:59:45.310819390 -0400
@@ -27,10 +27,11 @@
 #include <fcntl.h>
 #include <pthread.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <unwind.h>
+#include <signal.h>
 
 #if !SANITIZER_ANDROID
 // FIXME: where to get ucontext on Android?
 #include <sys/ucontext.h>
 #endif