A more exact commit title would be something like "warn for unhandled
characters before the initial token on a line".
On Fri, Jul 3, 2015 at 2:46 PM, Andreas Ruprecht
<andreas.ruprecht@xxxxxx> wrote:
> While commit 2e0d737fc76f ("kconfig: don't silently ignore unhandled
> characters") introduced a warning for unsupported characters inside
> parameters, it does not cover situations where a statement
> has additional characters around it.
This could say something like "...introduces a warning for unhandled characters
after the initial token on a line, but does not cover unhandled characters
before the initial token, which are ignored using a different mechanism."
>
> 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.
Similarly above.
>
> Reported-by: Valentin Rothberg <valentinrothberg@xxxxxxxxx>
> Signed-off-by: Andreas Ruprecht <andreas.ruprecht@xxxxxx>
> ---
> 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 */
> + return T_HELP;
> + }
I haven't tried it out to see if there would be problems, but adding '-' to the
n [A-Za-z0-9_]
definition in zconf.l and adding '---help---' to zconf.gperf seems cleaner than
special-casing it in zconf.l. If '---help---' is treated as a token, then it
makes sense to include '-' among the token characters.
(I also rambled a bit in
http://www.spinics.net/lists/linux-kbuild/msg11393.html.)
With that change, '-' could be removed from the parameter regex ({n}|[-/.])+ in
zconf.l too.
> + . {
> + fprintf(stderr,
> + "%s:%d:warning: ignoring unsupported character '%c'\n",
> + zconf_curname(), zconf_lineno(), *yytext);
> + }
> \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) {
> --
> 1.9.1
>
Cheers,
Ulf
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