Add support for -pie.

	* options.h (class General_options): Add -pie and
	--pic-executable.
	(General_options::output_is_position_independent): Test -pie.
	(General_options::output_is_executable): Return true if not shared
	and not relocatable.
	(General_options::output_is_pie): Remove.
	* options.cc (General_options::finalize): Reject incompatible uses
	of -pie.
	* gold.cc (queue_middle_tasks): A -pie link is not static.
	* symtab.h (Symbol::needs_plt_entry): Return false if -pie.
	* symtab.cc (Symbol::final_value_is_known): Return false if
	output_is_position_independent.
	* layout.cc (Layout::set_segment_offsets): Start at address 0 if
	output_is_position_independent.
	* output.cc (Output_file_header::do_sized_write): Use ET_DYN if
	output_is_position_independent.
	* i386.cc (Output_data_plt_i386::do_write): Use the PIC PLT if
	output_is_position_independent.
	* testsuite/Makefile.am (check_PROGRAMS): Add basic_pie_test and
	two_file_pie_test.
	(basic_pie_test.o, basic_pie_test): New targets.
	(two_file_test_1_pie.o, two_file_test_1b_pie.o): New targets.
	(two_file_test_2_pie.o, two_file_test_main_pie.o): New targets.
	(two_file_pie_test): New target.
	* testsuite/Makefile.in: Rebuild.
	* README: Remove note saying that -pie is not supported.

1 files changed, 2 insertions, 2 deletions

diff --git a/gold/i386.cc b/gold/i386.cc
index 18eb849..5ac9ff4 100644
--- a/gold/i386.cc
+++ b/gold/i386.cc
@@ -692,7 +692,7 @@ Output_data_plt_i386::do_write(Output_file* of)
   elfcpp::Elf_types<32>::Elf_Addr plt_address = this->address();
   elfcpp::Elf_types<32>::Elf_Addr got_address = this->got_plt_->address();
 
-  if (parameters->options().shared())
+  if (parameters->options().output_is_position_independent())
     memcpy(pov, dyn_first_plt_entry, plt_entry_size);
   else
     {
@@ -724,7 +724,7 @@ Output_data_plt_i386::do_write(Output_file* of)
     {
       // Set and adjust the PLT entry itself.
 
-      if (parameters->options().shared())
+      if (parameters->options().output_is_position_independent())
 	{
 	  memcpy(pov, dyn_plt_entry, plt_entry_size);
 	  elfcpp::Swap_unaligned<32, false>::writeval(pov + 2, got_offset);