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On 09/02/10 04:03, Jiri Slaby wrote:
> On 09/02/2010 02:12 AM, Rafi Rubin wrote:
>>
>>
>> On 09/01/2010 04:12 PM, Jiri Slaby wrote:
>>> On 09/01/2010 11:48 AM, Rafi Rubin wrote:
>>>> --- a/drivers/hid/hid-ntrig.c
>>>> +++ b/drivers/hid/hid-ntrig.c
>>>> @@ -90,6 +90,26 @@ struct ntrig_data {
>>>> };
>>>>
>>>>
>>>> +/*
>>>> + * This function converts the 4 byte raw firmware code into
>>>> + * a string containing 5 comma separated numbers.
>>>> + */
>>>> +static int ntrig_version_string(unsigned char *raw, char *buf)
>>>> +{
>>>> + __u8 a = (raw[1]& 0b00001110)>> 1;
>>>> + __u8 b = (raw[0]& 0b00111100)>> 2;
>>>> + __u8 c = ((raw[0]& 0b00000011)<< 3) | ((raw[3]&
>>>> 0b11100000)>> 5);
>>>> + __u8 d = ((raw[3]& 0b00000111)<< 3) | ((raw[2]&
>>>> 0b11100000)>> 5);
>>>> + __u8 e = raw[2]& 0b00000111;
>>>
>>> This won't compile with gcc 3.4 which we still support. Maybe time to
>>> kill the support?
>>>
>>> ...
>>
>> Why not?
>
> Beacuse it's a gnu extension added in gcc 4.3. (I though it's in gcc 4.0
> initially, but it's not. So you cannot use it in the kernel code at all.)
Sorry, would you please clarify "it". Which bit of syntax in that code is
unsupported by the older versions of gcc?
Rafi
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