Fix asan build failure with glibc-2.26, not finding the SIGSEGV define. Solved by explicitly including the signal.h header. Ok for the gcc-5 branch?
Matthias
PS: libsanitizer still needs the backport for PR 81066
* asan/asan_linux.cc: Include <signal.h>
--- a/src/libsanitizer/asan/asan_linux.cc
+++ b/src/libsanitizer/asan/asan_linux.cc
@@ -29,6 +29,7 @@
#include <dlfcn.h>
#include <fcntl.h>
#include <pthread.h>
+#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <unwind.h>
