gdb

gdb
	PR breakpoints/11816:
	* linespec.c (decode_line_1): Parse `function:label' linespecs.
	(decode_compound): Update.
	(find_function_symbol): New function.
	(decode_dollar): Update.
	(decode_label): Add 'function_symbol' parameter.  Handle
	function-relative labels.
	(decode_variable): Update.
	(symbol_found): Add 'function_symbol' parameter.  Use label's PC,
	not its line.  Set `special_display' and canonical name for
	labels.
gdb/doc
	* gdb.texinfo (Specify Location): Document `function:label'
	linespec.
gdb/testsuite
	* gdb.base/label.exp: Use `main:there' linespec.  Add re-running
	test.