2009-10-16 Doug Kwan <dougkwan@google.com>

2009-10-16  Doug Kwan  <dougkwan@google.com>

	* expression.cc (class Segment_start_expression): New class definition.
	(Segment_start_expression::value): New method definition.
	(script_exp_function_segment_start): Return a new
	Segment_start_expression.
	* gold/script-c.h (script_saw_segment_start_expression): New function
	prototype.
	* script-sections.cc (Script_sections::Script_sections): Initialize
	SAW_SEGMENT_START_EXPRESSION_ to false.
	(Script_sections::set_section_addresses): Use -Ttext, -Tdata
	and -Tbbs options to specify section addresses if given in
	command line and no SEGMENT_START expression is seen in a script.
	* script-sections.h (Script_sections::saw_segment_start_expression,
	Script_sections::set_saw_segment_start_expression): New method
	definition.
	(Script_sections::saw_segment_start_expression_): New data member
	declaration.
	* script.cc (script_saw_segment_start_expression): New function.
	* yyscript.y (SEGMENT_START): Call script_saw_segment_start_expression.
	* testsuite/Makefile.am (check_SCRIPTS): Add script_test_6.sh,
	script_test_7.sh and script_test_8.sh.
	(check_DATA): Add script_test_6.stdout, script_test_7.stdout and
	script_test_8.stdout.
	(MOSTLYCLEANFILES): Add script_test_6, script_test_7 and script_test_8.
	(script_test_6, script_test_6.stdout, script_test_7,
	script_test_7.stdout, script_test_8, script_test_8.stdout): New rules.
	* Makefile.in: Regenerate.
	* testsuite/script_test_6.sh: New file.
	* testsuite/script_test_6.t: Same.
	* testsuite/script_test_7.sh: Same.
	* testsuite/script_test_7.t: Same.
	* testsuite/script_test_8.sh: Same.