Hi,

applied, tested and pushed.

best regards
 Waldemar

Marcus Hähnel wrote,

> Dear list,
> 
> we came across a problem that might be very specific to our own setup and how 
> we use the lib. We still wanted to share the
> patch if there is general interest. 
> 
> Recent Clang versions (Starting from 20) have the __INT64_C and __UINT64_C 
> macros built-in. The compiler does not warn
> about this normally because <stdint.h> is a system header. In special cases 
> where stdint.h may be included as normal header
> (which is the case for our system) it does warn however. Avoid re-defining if 
> a definition already exists.
> 
> The change would not impact users that use stdint.h exclusively as system 
> header.
> 
> Best regards,
> 
> - Marcus
> 
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> 
> 
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> From d0b55797a9c2903791a151c50d9aa741661d8d61 Mon Sep 17 00:00:00 2001
> From: Frank Mehnert <frank.mehn...@kernkonzept.com>
> Date: Wed, 5 Mar 2025 15:26:34 +0100
> Subject: [PATCH] stdint.h: don't define __INT64_C / __UINT64_C if already
>  defined
> 
> Recent Clang versions (Starting from 20) have this macro built-in. The
> compiler does not warn about this normally because <stdint.h> is a
> system header. In special cases where stdint.h may be included as normal
> header it does warn however. Avoid re-defining if a definition already
> exists.
> 
> Signed-off-by: Marcus Haehnel <marcus.haeh...@kernkonzept.com>
> ---
>  include/stdint.h | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/include/stdint.h b/include/stdint.h
> index 749f73697..5fedfb574 100644
> --- a/include/stdint.h
> +++ b/include/stdint.h
> @@ -144,11 +144,19 @@ typedef unsigned long long int  uintmax_t;
>  
>  
>  # if __WORDSIZE == 64
> +#  ifndef __INT64_C
>  #  define __INT64_C(c)       c ## L
> +#  endif
> +#  ifndef __UINT64_C
>  #  define __UINT64_C(c)      c ## UL
> +#  endif
>  # else
> +#  ifndef __INT64_C
>  #  define __INT64_C(c)       c ## LL
> +#  endif
> +#  ifndef __UINT64_C
>  #  define __UINT64_C(c)      c ## ULL
> +#  endif
>  # endif
>  
>  /* Limits of integral types.  */
> -- 
> 2.47.1
> 




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