More betterer sorting.

backends.py

@@ -277,7 +277,8 @@ class Backend():
             for src in self.generate_unity_files(target, unity_src):
                 obj_list.append(self.generate_single_compile(target, outfile, src, True, unity_deps + header_deps))
         linker = self.determine_linker(target, src_list)
-        elem = self.generate_link(target, outfile, outname, obj_list, linker)
+        # Sort object list to preserve command line over multiple invocations.
+        elem = self.generate_link(target, outfile, outname, sorted(obj_list), linker)
         self.generate_shlib_aliases(target, self.get_target_dir(target), outfile, elem)
         self.processed_targets[name] = True
 

ninjabackend.py

@@ -71,7 +71,7 @@ class NinjaBuildElement():
         # This allows Ninja to skip unnecessary rebuilds.
         line = 'build %s: %s %s' % (' '.join([ninja_quote(i) for i in self.outfilenames]),\
                                     self.rule,
-                                    ' '.join([ninja_quote(i) for i in sorted(self.infilenames)]))
+                                    ' '.join([ninja_quote(i) for i in self.infilenames]))
         if len(self.deps) > 0:
             line += ' | ' + ' '.join([ninja_quote(x) for x in self.deps])
         if len(self.orderdeps) > 0: