Implement --push-state/--pop-state.

gold/
	PR gold/18989
	* options.cc (General_options::object_format_to_string): New function.
	(General_options::copy_from_posdep_options): New function.
	(General_options::parse_push_state): New function.
	(General_options::parse_pop_state): New function.
	* options.h (--push-state, --pop-state): New options.
	(General_options::object_format_to_string): New method.
	(General_options::set_incremental_disposition): New method.
	(General_options::copy_from_posdep_options): New method.
	(General_options::options_stack_): New data member.

1 files changed, 47 insertions, 0 deletions

diff --git a/gold/options.cc b/gold/options.cc
index 73a3f67..276be39 100644
--- a/gold/options.cc
+++ b/gold/options.cc
@@ -689,6 +689,20 @@ General_options::string_to_object_format(const char* arg)
     }
 }
 
+const char*
+General_options::object_format_to_string(General_options::Object_format fmt)
+{
+  switch (fmt)
+    {
+    case General_options::OBJECT_FORMAT_ELF:
+      return "elf";
+    case General_options::OBJECT_FORMAT_BINARY:
+      return "binary";
+    default:
+      gold_unreachable();
+    }
+}
+
 void
 General_options::parse_fix_v4bx(const char*, const char*,
 				Command_line*)
@@ -715,6 +729,39 @@ General_options::parse_EL(const char*, const char*, Command_line*)
   this->endianness_ = ENDIANNESS_LITTLE;
 }
 
+void
+General_options::copy_from_posdep_options(
+    const Position_dependent_options& posdep)
+{
+  this->set_as_needed(posdep.as_needed());
+  this->set_Bdynamic(posdep.Bdynamic());
+  this->set_format(
+      General_options::object_format_to_string(posdep.format_enum()));
+  this->set_whole_archive(posdep.whole_archive());
+  this->set_incremental_disposition(posdep.incremental_disposition());
+}
+
+void
+General_options::parse_push_state(const char*, const char*, Command_line*)
+{
+  Position_dependent_options* posdep = new Position_dependent_options(*this);
+  this->options_stack_.push_back(posdep);
+}
+
+void
+General_options::parse_pop_state(const char*, const char*, Command_line*)
+{
+  if (this->options_stack_.empty())
+    {
+      gold::gold_error(_("unbalanced --push-state/--pop-state"));
+      return;
+    }
+  Position_dependent_options* posdep = this->options_stack_.back();
+  this->options_stack_.pop_back();
+  this->copy_from_posdep_options(*posdep);
+  delete posdep;
+}
+
 } // End namespace gold.
 
 namespace