Re: [PTACH] libcacard: fix VCARD_ATTR_PREFIX macro

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On Sun, Mar 18, 2012 at 06:41:18PM +0100, Marcel Heinz wrote:
> Hi,
> 

Thanks for the patch, but I think you are using a not up to date tree,
it's fixed by:


commit 0202181245297a9e847c05f4a18623219d95e93e
Author: Hans de Goede <hdegoede@xxxxxxxxxx>
Date:   Fri Mar 2 16:49:44 2012 +0100

    libcacard: Fix compilation with gcc-4.7

(same fix).

Alon
> i just tried to compile lastest git HEAD and ran into the following
> problem:
> 
> vcard_emul_nss.c:528:1: error: initializer element is not constant
> 
> The source code is:
> static const unsigned char nss_atr[] = { VCARD_ATR_PREFIX(3), 'N', 'S', 'S' };
> 
> with
> 
> #define VCARD_ATR_PREFIX(size) (0x3b, 0x68+(size), 0x00, 0xff, \
>                                 'V', 'C', 'A', 'R', 'D', '_')
> 
> The parentheses in this macro result in the use of the comma operator
> in the initialization and are clearly not correct. This is a regression
> from commit 0082f4336e128a17d5f34e01de0fd29930e99b0d, which changed
> 0x66+(size) to 0x68+size and added the parenthesis.
> 
> So I propose the following patch:
> 
> diff --git a/libcacard/vcardt.h b/libcacard/vcardt.h
> index d4d8e2e..d3e9522 100644
> --- a/libcacard/vcardt.h
> +++ b/libcacard/vcardt.h
> @@ -26,8 +26,8 @@ typedef struct VCardEmulStruct VCardEmul;
>  #define MAX_CHANNEL 4
> 
>  /* create an ATR with appropriate historical bytes */
> -#define VCARD_ATR_PREFIX(size) (0x3b, 0x68+(size), 0x00, 0xff, \
> -                               'V', 'C', 'A', 'R', 'D', '_')
> +#define VCARD_ATR_PREFIX(size) 0x3b, 0x68+(size), 0x00, 0xff, \
> +                               'V', 'C', 'A', 'R', 'D', '_'
> 
> 
>  typedef enum {
> 
> 
> 
> Regards,
> 	Marcel
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