--- a/src/mklibs.py
+++ b/src/mklibs.py
@@ -500,7 +500,7 @@ while 1:
         # No progress in last pass. Verify all remaining symbols are weak.
         for name in unresolved:
             if not needed_symbols[name].weak:
-                raise "Unresolvable symbol %s" % name
+                print "WARNING: Unresolvable symbol %s" % name
         break
 
     previous_pass_unresolved = unresolved
@@ -533,10 +533,7 @@ while 1:
 
     # which symbols are actually used from each lib
     for name in needed_symbols:
-        if not name in symbol_provider:
-            if not needed_symbols[name].weak:
-                raise "No library provides non-weak %s" % name
-        else:
+        if name in symbol_provider:
             lib = symbol_provider[name]
             library_symbols_used[lib].add(library_symbols[lib][name])
 
