Index: elfutils-0.159/libdwfl/linux-pid-attach.c
===================================================================
--- elfutils-0.159.orig/libdwfl/linux-pid-attach.c
+++ elfutils-0.159/libdwfl/linux-pid-attach.c
@@ -393,6 +393,16 @@ pid_getthread (Dwfl *dwfl __attribute__
   return false;
 }
 
+bool
+internal_function
+__libdwfl_ptrace_attach (pid_t tid __attribute__ ((unused)),
+			 bool *tid_was_stoppedp __attribute__ ((unused)))
+{
+  errno = ENOSYS;
+  __libdwfl_seterrno (DWFL_E_ERRNO);
+  return false;
+}
+
 static bool
 pid_memory_read (Dwfl *dwfl __attribute__ ((unused)),
                  Dwarf_Addr addr __attribute__ ((unused)),
@@ -419,6 +429,13 @@ pid_detach (Dwfl *dwfl __attribute__ ((u
 {
 }
 
+void
+internal_function
+__libdwfl_ptrace_detach (pid_t tid __attribute__ ((unused)),
+			 bool tid_was_stopped __attribute__ ((unused)))
+{
+}
+
 static void
 pid_thread_detach (Dwfl_Thread *thread __attribute__ ((unused)),
 		  void *thread_arg __attribute__ ((unused)))