Re: [Qemu-devel] [PATCH 5/8] tcg: Remove stray semi-colons from target-*/helper.h

[Stefan Weil <sw@weilnetz.de>]

Am 15.09.2013 02:03, schrieb Richard Henderson:
> During GEN_HELPER=1, these are actually stray top-level semi-colons
> which are technically invalid ISO C, but GCC accepts as an extension.
> If we added enough __extension__ markers that we could dare use
> -Wpedantic, we'd see
>
>   warning: ISO C does not allow extra ‘;’ outside of a function
>
> This will become a hard error in the next patch, wherein those ; will
> appear in the middle of a data structure.
>
> Signed-off-by: Richard Henderson <rth@twiddle.net>
> ---

Instead of removing the semicolons from the DEF_HELPER_x lines,
I'd prefer removing them from the DEF_HELPER_FLAGS_x definitions.

Code formatters and static code analyzers (maybe humans, too) prefer
lines which look like valid C syntax, therefore

DEF_HELPER_FLAGS_1(ctpop, TCG_CALL_NO_RWG_SE, i64, i64);

is better for such tools than

DEF_HELPER_FLAGS_1(ctpop, TCG_CALL_NO_RWG_SE, i64, i64)

The compiler will also complain if someone adds a new DEF_HELPER_FLAGS_x
without semicolon in the first case, but it won't complain if someone adds
it with semicolon in the second case.

Regards,
Stefan