* dll_init.cc (dll_list::find_by_modname): New function to search the dll list

for a module name only (no path).
(dll_list::alloc): Initialize newly-added members of struct dll.
(dll_list::append): New function to factor out the append operation
(used by dll_list::topsort).
(dll_list::populate_deps): New function to identify dll dependencies.
(dll_list::topsort): New function to sort the dll list topologically by
dependencies.
(dll_list::topsort_visit): New helper function for the above.
* dll_init.h (dll::ndeps): New class member.
(dll::deps): Ditto.
(dll::modname): Ditto.
(dll_list::find_by_modname): New function related to topsort.
(dll_list::populate_all_deps): Ditto.
(dll_list::populate_deps): Ditto.
(dll_list::topsort): Ditto.
(dll_list::topsort_visit): Ditto.
(dll_list::append): Ditto.
(pefile): New struct allowing simple introspection of dll images.
* fork.cc (fork): Topologically sort the dll list before forking.

winsup/cygwin/fork.cc

@@ -625,7 +625,7 @@ fork ()
        the thread-local storage.  A process forking too deeply will run into
        the problem to be out of temporary TLS path buffers. */
     tmp_pathbuf tp;
-
+  
     if (!held_everything)
       {
 	if (exit_state)
@@ -634,6 +634,12 @@ fork ()
 	return -1;
       }
 
+    /* Put the dll list in topological dependency ordering, in
+       hopes that the child will have a better shot at loading dlls
+       properly if it only has to deal with one at a time.
+    */
+    dlls.topsort ();
+
     ischild = !!setjmp (grouped.ch.jmp);
 
     volatile char * volatile esp;