[PATCH] cpp: Fix missing extern "C" closing bracket

[Bruce Richardson]

On Tue, Jun 24, 2025 at 02:12:53PM +0300, Edvard Fagerholm wrote:
> RTE_FORCE_INTRINSICS with a C++ compiler causes rte_atomic.h and
> rte_byteorder.h to emit on x86 an extern "C" without a closing
> brace.
> ---

Unfortunately, patch is missing a signoff, so isn't eligible for merge. Can
you please submit a v2 with the appropriate signoff included. See [1] for
more details.

For the patch itself, it looks ok to me, but really the various #endif and
#else tags need comments on them to indicate which #ifdef they belong to
(unless it's a very short ifdef). If you do a v2 would you consider adding
those comments to help make the code clearer?

With or without that suggestion, you can include my ack on v2.

Acked-by: Bruce Richardson <bruce.richardson at intel.com>

Regards,
/Bruce

[1] https://doc.dpdk.org/guides/contributing/patches.html

>  lib/eal/x86/include/rte_atomic.h    | 4 ++--
>  lib/eal/x86/include/rte_byteorder.h | 9 +++++----
>  2 files changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/lib/eal/x86/include/rte_atomic.h b/lib/eal/x86/include/rte_atomic.h
> index c72c47c83e..68629016b4 100644
> --- a/lib/eal/x86/include/rte_atomic.h
> +++ b/lib/eal/x86/include/rte_atomic.h
> @@ -282,10 +282,10 @@ static inline int rte_atomic32_dec_and_test(rte_atomic32_t *v)
>  	return ret != 0;
>  }
>  
> -#ifdef __cplusplus
> -}
>  #endif
>  
> +#ifdef __cplusplus
> +}
>  #endif
>  
>  #ifdef RTE_ARCH_I686
> diff --git a/lib/eal/x86/include/rte_byteorder.h b/lib/eal/x86/include/rte_byteorder.h
> index 5a49ffcd50..62a87c1aa6 100644
> --- a/lib/eal/x86/include/rte_byteorder.h
> +++ b/lib/eal/x86/include/rte_byteorder.h
> @@ -48,10 +48,6 @@ static inline uint32_t rte_arch_bswap32(uint32_t _x)
>  	return x;
>  }
>  
> -#ifdef __cplusplus
> -}
> -#endif
> -
>  #define rte_bswap16(x) ((uint16_t)(__builtin_constant_p(x) ?		\
>  				   rte_constant_bswap16(x) :		\
>  				   rte_arch_bswap16(x)))
> @@ -69,6 +65,11 @@ static inline uint32_t rte_arch_bswap32(uint32_t _x)
>  #else
>  #include "rte_byteorder_64.h"
>  #endif
> +
> +#endif
> +
> +#ifdef __cplusplus
> +}
>  #endif
>  
>  #define rte_cpu_to_le_16(x) (x)
> -- 
> 2.34.1
>