--- gcc-5.3.0/libsanitizer/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc	2014-05-22 09:09:21.000000000 +0200
+++ gcc-5.3.0/libsanitizer/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc	2018-05-12 15:24:44.080409821 +0200
@@ -31,6 +31,12 @@
 #endif
 #include <sys/wait.h> // for signal-related stuff
 
+struct sigaltstack {
+        void *ss_sp;
+        int ss_flags;
+        size_t ss_size;
+};
+
 #ifdef sa_handler
 # undef sa_handler
 #endif