[flashrom] Building on Windows with mingw

[Miklos Marton]

> diff --git a/flash.h b/flash.h
> index a80a9c2..40a7f1a 100644
> --- a/flash.h
> +++ b/flash.h
> @@ -360,6 +360,9 @@ int flashrom_print_cb(enum flashrom_log_level level, const char *fmt, va_list ap
>   /* Let gcc and clang check for correct printf-style format strings. */
>   int print(enum flashrom_log_level level, const char *fmt, ...)
>   #ifdef __MINGW32__
> +#  ifndef __MINGW_PRINTF_FORMAT
> +#    define __MINGW_PRINTF_FORMAT gnu_printf
> +#  endif
>   __attribute__((format(__MINGW_PRINTF_FORMAT, 2, 3)));
>   #else
>   __attribute__((format(printf, 2, 3)));
>
>
> This should be OK because the define is only applied when using MinGW.
>
> JFYI I decided for a less backward compatible solution in the other
> project:
> https://git.ao2.it/libam7xxx.git/commitdiff/bbebd199987581ee6f344c89bfb02237dc0ab0bd
>
> Ciao,
>     Antonio
This method compiles without warnings. Thank you very much!
Are you planning to submit a patch to flashrom, or should we handle that?

Best regards,
Miklos Marton