Re: [PATCH v5 3/7] configure: add --enable-qpl build option

["Daniel P. Berrangé" <berrange@redhat.com>]

On Wed, Mar 20, 2024 at 12:45:23AM +0800, Yuan Liu wrote:
> add --enable-qpl and --disable-qpl options to enable and disable
> the QPL compression method for multifd migration.
> 
> the Query Processing Library (QPL) is an open-source library
> that supports data compression and decompression features.
> 
> The QPL compression is based on the deflate compression algorithm
> and use Intel In-Memory Analytics Accelerator(IAA) hardware for
> compression and decompression acceleration.
> 
> Please refer to the following for more information about QPL
> https://intel.github.io/qpl/documentation/introduction_docs/introduction.html
> 
> Signed-off-by: Yuan Liu <yuan1.liu@intel.com>
> Reviewed-by: Nanhai Zou <nanhai.zou@intel.com>
> ---
>  meson.build                   | 16 ++++++++++++++++
>  meson_options.txt             |  2 ++
>  scripts/meson-buildoptions.sh |  3 +++
>  3 files changed, 21 insertions(+)
> 
> diff --git a/meson.build b/meson.build
> index b375248a76..bee7dcd53b 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -1200,6 +1200,20 @@ if not get_option('zstd').auto() or have_block
>                      required: get_option('zstd'),
>                      method: 'pkg-config')
>  endif
> +qpl = not_found
> +if not get_option('qpl').auto()
> +  libqpl = cc.find_library('qpl', required: false)
> +  if not libqpl.found()
> +    error('libqpl not found, please install it from ' +
> +    'https://intel.github.io/qpl/documentation/get_started_docs/installation.html')
> +  endif
> +  libaccel = dependency('libaccel-config', version: '>=4.0.0',
> +                        required: true,
> +                        method: 'pkg-config')
> +  qpl = declare_dependency(dependencies: [libqpl, libaccel,
> +        cc.find_library('dl', required: get_option('qpl'))],
> +        link_args: ['-lstdc++'])
> +endif

Are either of these libraries present in any mainstream Linux
distro ? If not, then this feature will not get any CI build
coverage from QEMU.

Needing to manually add '-lstdc++' & '-ldl' is presumably a
requirement from 'qpl'. As a future enhancement it would be
much better if 'qpl' provided a pkg-config file, so this
list of dependencies didn't have to be hardcoded by apps
using qpl


With regards,
Daniel
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