htl: Add missing include

For IS_IN.

diff --git a/sysdeps/htl/pthreadP.h b/sysdeps/htl/pthreadP.h
index 8ea60949ecb2266e1bb4b2a62b55498b6618f758..471a4cfa4391c5679a752a8a764f7c624af6c75a 100644 (file)
--- a/sysdeps/htl/pthreadP.h
+++ b/sysdeps/htl/pthreadP.h
@@ -24,6 +24,7 @@
 #include <pthread.h>
 #include <link.h>
 #include <bits/cancelation.h>
+#include <libc-symbols.h>
 
 /* Attribute to indicate thread creation was issued from C11 thrd_create.  */
 #define ATTR_C11_THREAD ((void*)(uintptr_t)-1)