Description: Fix FTBFS on Hurd.
 Make MIG output parsing more robust.
 Based on a patch by David Michael <fedora.dm0@gmail.com>.
Author: Thomas Schwinge <thomas@codesourcery.com>
Origin: upstream, https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=d47642c93dda6344af12458e4e26587f3353fb44

diff --git a/gdb/reply_mig_hack.awk b/gdb/reply_mig_hack.awk
index 6d27685..15bfdfb 100644
--- a/gdb/reply_mig_hack.awk
+++ b/gdb/reply_mig_hack.awk
@@ -92,6 +92,12 @@ parse_phase == 5 && /^[ \t]*mig_external kern_return_t/ {
 }
 
 parse_phase == 5 && /^#if[ \t]TypeCheck/ {
+  # Keep going if we have not yet collected the type check structures.
+  if (num_checks == 0)
+    {
+      print; next;
+    }
+
   # The first args type checking statement; we need to insert our chunk of
   # code that bypasses all the type checks if this is an error return, after
   # which we're done until we get to the next function.  Handily, the size