lkml.org 
[lkml]   [2015]   [Jul]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 1/2] kconfig: also warn of unhandled characters in statements
From
Date
On vr, 2015-07-03 at 14:46 +0200, Andreas Ruprecht wrote:
> While commit 2e0d737fc76f ("kconfig: don't silently ignore unhandled
> characters") introduced a warning for unsupported characters inside
> parameters,

What are "parameters"? The term doesn't show up in Documentation/kbuild.

There's TF_PARAM in zconf.gperf, but that's some odd category that
apparently only includes "on" and "if". zconf.l only has the
undocumented PARAM state.

> it does not cover situations where a statement
> has additional characters around it.
>
> This change introduces a warning if superfluous characters are found
> around statements. As the 'help' statement sometimes is written as
> '---help---', the '-' character would now also be regarded as
> unhandled, this change also adds a special rule for this case.

[...], but '-' characters will now also generate a warning,
add a special rule for that case.

or something along those lines.

Should we elaborate here that currently "---help---" only is an alias
for "help" because we simply skip "---" when parsing Kconfig files? Or
is that trick so obscure that nobody else will care about it?

> Reported-by: Valentin Rothberg <valentinrothberg@gmail.com>
> Signed-off-by: Andreas Ruprecht <andreas.ruprecht@fau.de>
> ---
> scripts/kconfig/zconf.l | 11 +++++++++--
> 1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/scripts/kconfig/zconf.l b/scripts/kconfig/zconf.l
> index 200a3fe..84a5d05 100644
> --- a/scripts/kconfig/zconf.l
> +++ b/scripts/kconfig/zconf.l
> @@ -106,7 +106,15 @@ n [A-Za-z0-9_]
> zconflval.string = text;
> return T_WORD;
> }
> - .
> + "---help---" {
> + /* Support old syntax for help statement */

s/old/alternative/?

> + return T_HELP;
> + }
> + . {
> + fprintf(stderr,
> + "%s:%d:warning: ignoring unsupported character '%c'\n",
> + zconf_curname(), zconf_lineno(), *yytext);
> + }

Could you add and use a small helper function for this warning and the
identical warning that was added in commit 2e0d737fc76f?

> \n {
> BEGIN(INITIAL);
> current_file->lineno++;
> @@ -132,7 +140,6 @@ n [A-Za-z0-9_]
> BEGIN(STRING);
> }
> \n BEGIN(INITIAL); current_file->lineno++; return T_EOL;
> - --- /* ignore */
> ({n}|[-/.])+ {
> const struct kconf_id *id = kconf_id_lookup(yytext, yyleng);
> if (id && id->flags & TF_PARAM) {

Thanks,


Paul Bolle


\
 
 \ /
  Last update: 2015-07-05 12:21    [W:1.021 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site