Force intermediate targets to be considered if their non-intermediate

parent needs to be remade.  Fixes Savannah bug #30653.

ChangeLog

@@ -1,5 +1,9 @@
 2012-09-09  Paul Smith  <psmith@gnu.org>
 
+	* remake.c (update_file_1): Force intermediate files to be
+	considered, not pruned, if their non-intermediate parent needs to
+	be remade.  Fixes Savannah bug #30653.
+
 	* job.c (construct_command_argv_internal): Keep the command line
 	on the heap for very long lines.  Fixes Savannah bug #36451.
 

remake.c

@@ -612,6 +612,10 @@ update_file_1 (struct file *file, unsigned int depth)
                 d->file->dontcare = file->dontcare;
               }
 
+            /* We may have already considered this file, when we didn't know
+               we'd need to update it.  Force update_file() to consider it and
+               not prune it.  */
+            d->file->considered = !considered;
 
 	    dep_status |= update_file (d->file, depth);
 

tests/scripts/features/parallelism

@@ -214,6 +214,23 @@ rm main.x");
     rmfiles(qw(foo.y foo.y.in main.bar));
 }
 
+# Ensure intermediate/secondary files are not pruned incorrectly.
+# See Savannah bug #30653
+
+utouch(-15, 'file2');
+utouch(-10, 'file4');
+utouch(-5,  'file1');
+
+run_make_test(q!
+.INTERMEDIATE: file3
+file4: file3 ; @mv -f $< $@
+file3: file2 ; touch $@
+file2: file1 ; @touch $@
+!,
+              '--no-print-directory -j2', "touch file3");
+
+#rmfiles('file1', 'file2', 'file3', 'file4');
+
 if ($all_tests) {
     # Jobserver FD handling is messed up in some way.
     # Savannah bug #28189