* gold.cc: Include "incremental.h".

	(queue_initial_tasks): Call Incremental_checker methods.
	* incremental.cc: Include "output.h".
	(Incremental_checker::can_incrementally_link_output_file): New
	method.
	* incremental.h (Incremental_checker): New class.

1 files changed, 13 insertions, 0 deletions

diff --git a/gold/incremental.cc b/gold/incremental.cc
index 25caabe..4a3ecb1 100644
--- a/gold/incremental.cc
+++ b/gold/incremental.cc
@@ -25,6 +25,7 @@
 #include "output.h"
 #include "incremental.h"
 #include "archive.h"
+#include "output.h"
 
 using elfcpp::Convert;
 
@@ -149,6 +150,18 @@ class Incremental_inputs_entry_write
   internal::Incremental_inputs_entry_data* p_;
 };
 
+// Analyzes the output file to check if incremental linking is possible and
+// (to be done) what files need to be relinked.
+
+bool
+Incremental_checker::can_incrementally_link_output_file()
+{
+  Output_file output(this->output_name_);
+  if (!output.open_for_modification())
+    return false;
+  return true;
+}
+
 // Add the command line to the string table, setting
 // command_line_key_.  In incremental builds, the command line is
 // stored in .gnu_incremental_inputs so that the next linker run can