Allow unquoted = as the first character in ldscript input_list names

	* ldlex.l (INPUTLIST): New start condition.
	(comment pattern, ",", "(", ")", "AS_NEEDED")
	({FILENAMECHAR1}{FILENAMECHAR}*, "-l"{FILENAMECHAR}+)
	(quoted string pattern, whitespace pattern): Add INPUTLIST to
	valid start conditions.
	(<INPUTLIST>"="{FILENAMECHAR1}{FILENAMECHAR}*): New NAME rule.
	(ldlex_inputlist): New start-condition-setter function.
	* ldgram.y (input_list1): Rename from input_list.  All recursive
	use changed.
	(input_list): New wrapper rule for input_list1, setting
	INPUTLIST lexer state for the duration of parsing input_list1.

All this to say INPUT(=/path/to/file) and not be forced to use
INPUT("=/path/to/file") whenever there's a need to force a sysroot-
prefix.  Still, IMHO it seems better to make use of a previously
invalid syntax and not only change the meaning of quoted =-prefixed
paths (though arguably that's not very useful before this patchset).

This got a little bit hairier than I'd expected: I had to add a new
lexer state (aka. start condition) to avoid a first "=" being lexed as
the token "=", despite that not making sense in constructs expecting
file-names in the first place.  (The grammar doesn't allow for
expressions in any part of those lists.)  I guess I *could* have made
it work using that token anyway, but I didn't like the idea that you
would be able to separate the "=" from the rest of the file-name with
whitespace.

1 files changed, 14 insertions, 9 deletions

diff --git a/ld/ldgram.y b/ld/ldgram.y
index 4875fa7..e76a0a3 100644
--- a/ld/ldgram.y
+++ b/ld/ldgram.y
@@ -365,38 +365,43 @@ ifile_p1:
 	;
 
 input_list:
+		{ ldlex_inputlist(); }
+		input_list1
+		{ ldlex_popstate(); }
+
+input_list1:
 		NAME
 		{ lang_add_input_file($1,lang_input_file_is_search_file_enum,
 				 (char *)NULL); }
-	|	input_list ',' NAME
+	|	input_list1 ',' NAME
 		{ lang_add_input_file($3,lang_input_file_is_search_file_enum,
 				 (char *)NULL); }
-	|	input_list NAME
+	|	input_list1 NAME
 		{ lang_add_input_file($2,lang_input_file_is_search_file_enum,
 				 (char *)NULL); }
 	|	LNAME
 		{ lang_add_input_file($1,lang_input_file_is_l_enum,
 				 (char *)NULL); }
-	|	input_list ',' LNAME
+	|	input_list1 ',' LNAME
 		{ lang_add_input_file($3,lang_input_file_is_l_enum,
 				 (char *)NULL); }
-	|	input_list LNAME
+	|	input_list1 LNAME
 		{ lang_add_input_file($2,lang_input_file_is_l_enum,
 				 (char *)NULL); }
 	|	AS_NEEDED '('
 		  { $<integer>$ = input_flags.add_DT_NEEDED_for_regular;
 		    input_flags.add_DT_NEEDED_for_regular = TRUE; }
-		     input_list ')'
+		     input_list1 ')'
 		  { input_flags.add_DT_NEEDED_for_regular = $<integer>3; }
-	|	input_list ',' AS_NEEDED '('
+	|	input_list1 ',' AS_NEEDED '('
 		  { $<integer>$ = input_flags.add_DT_NEEDED_for_regular;
 		    input_flags.add_DT_NEEDED_for_regular = TRUE; }
-		     input_list ')'
+		     input_list1 ')'
 		  { input_flags.add_DT_NEEDED_for_regular = $<integer>5; }
-	|	input_list AS_NEEDED '('
+	|	input_list1 AS_NEEDED '('
 		  { $<integer>$ = input_flags.add_DT_NEEDED_for_regular;
 		    input_flags.add_DT_NEEDED_for_regular = TRUE; }
-		     input_list ')'
+		     input_list1 ')'
 		  { input_flags.add_DT_NEEDED_for_regular = $<integer>4; }
 	;