[gold patch] incremental links should disable --gc-sections, --icf, etc.

[Cary Coutant <ccoutant at google dot com>]

Gold currently prints error messages if certain options are used with
incremental links, but does not exit. Most of these should call
gold_fatal instead of gold_error; for a few of them (--gc-sections,
--icf, --compress-debug-sections), it's reasonable to simply disable
the incompatible option and print a warning. I've also moved the code
to make these checks into General_options::finalize().

OK to commit?

-cary


	* gold/gold.cc (queue_initial_tasks): Move option checks ...
	* gold/options.cc (General_options::finalize): ... to here. Disable
	some options; make others fatal.

Attachment: disable-gc-patch.txt
Description: Text document