[PATCH v2] eal: introduce atomics abstraction

[Bruce Richardson]

On Wed, Feb 08, 2023 at 01:43:38PM -0800, Tyler Retzlaff wrote:
> Introduce atomics abstraction that permits optional use of standard C11
> atomics when meson is provided the new enable_stdatomics=true option.
> 
> Signed-off-by: Tyler Retzlaff <roretzla at linux.microsoft.com>
> ---
>  config/meson.build                     | 11 ++++
>  lib/eal/arm/include/rte_atomic_32.h    |  6 ++-
>  lib/eal/arm/include/rte_atomic_64.h    |  6 ++-
>  lib/eal/include/generic/rte_atomic.h   | 96 +++++++++++++++++++++++++++++++++-
>  lib/eal/loongarch/include/rte_atomic.h |  6 ++-
>  lib/eal/ppc/include/rte_atomic.h       |  6 ++-
>  lib/eal/riscv/include/rte_atomic.h     |  6 ++-
>  lib/eal/x86/include/rte_atomic.h       |  8 ++-
>  meson_options.txt                      |  2 +
>  9 files changed, 139 insertions(+), 8 deletions(-)
> 
> diff --git a/config/meson.build b/config/meson.build
> index 26f3168..25dd628 100644
> --- a/config/meson.build
> +++ b/config/meson.build
> @@ -255,6 +255,17 @@ endif
>  # add -include rte_config to cflags
>  add_project_arguments('-include', 'rte_config.h', language: 'c')
>  
> +stdc_atomics_enabled = get_option('enable_stdatomics')
> +dpdk_conf.set('RTE_STDC_ATOMICS', stdc_atomics_enabled)
> +
> +if stdc_atomics_enabled
> +if cc.get_id() == 'gcc' or cc.get_id() == 'clang'
> +    add_project_arguments('-std=gnu11', language: 'c')

Is there a reason for using gnu11 on gcc and clang, rather than limiting
ourselves to proper c11 support?

/Bruce