build: remove deprecated meson functions

  Starting in meson 0.56, the functions meson.source_root() and
meson.build_root() are deprecated and to be replaced by the [more
descriptive] functions: project_source_root()/global_source_root() and
project_build_root()/global_build_root(). Unfortunately, these new
replacement functions were only added in 0.56 release too, so to use
them we would need version checks for old/new functions to remove the
deprecation warnings.

However, the functions "current_build_dir()" and "current_source_dir()"
remain unaffected by all this, so we can bypass the versioning problem,
by saving off these values to "dpdk_source_root" and "dpdk_build_root"
in the top-level meson.build file

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 doc/api/meson.build          | 10 +++++-----
 kernel/freebsd/meson.build   |  4 ++--
 kernel/linux/kni/meson.build |  8 ++++----
 meson.build                  |  2 ++
 4 files changed, 13 insertions(+), 11 deletions(-)
  

On Mon, Jan 24, 2022 at 11:20 PM Bruce Richardson
<bruce.richardson@intel.com> wrote:
>
> Starting in meson 0.56, the functions meson.source_root() and
> meson.build_root() are deprecated and to be replaced by the [more
> descriptive] functions: project_source_root()/global_source_root() and
> project_build_root()/global_build_root(). Unfortunately, these new
> replacement functions were only added in 0.56 release too, so to use
> them we would need version checks for old/new functions to remove the
> deprecation warnings.
>
> However, the functions "current_build_dir()" and "current_source_dir()"
> remain unaffected by all this, so we can bypass the versioning problem,
> by saving off these values to "dpdk_source_root" and "dpdk_build_root"
> in the top-level meson.build file
>
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>

Tested-by: Jerin Jacob <jerinj@marvell.com>


> ---
>  doc/api/meson.build          | 10 +++++-----
>  kernel/freebsd/meson.build   |  4 ++--
>  kernel/linux/kni/meson.build |  8 ++++----
>  meson.build                  |  2 ++
>  4 files changed, 13 insertions(+), 11 deletions(-)
>
> diff --git a/doc/api/meson.build b/doc/api/meson.build
> index 7e2b429ac8..5c25b92092 100644
> --- a/doc/api/meson.build
> +++ b/doc/api/meson.build
> @@ -24,7 +24,7 @@ htmldir = join_paths(get_option('datadir'), 'doc', 'dpdk')
>  # So use a configure option for now.
>  example = custom_target('examples.dox',
>          output: 'examples.dox',
> -        command: [generate_examples, join_paths(meson.source_root(), 'examples'), '@OUTPUT@'],
> +        command: [generate_examples, join_paths(dpdk_source_root, 'examples'), '@OUTPUT@'],
>          depfile: 'examples.dox.d',
>          install: get_option('enable_docs'),
>          install_dir: htmldir,
> @@ -32,11 +32,11 @@ example = custom_target('examples.dox',
>
>  cdata = configuration_data()
>  cdata.set('VERSION', meson.project_version())
> -cdata.set('API_EXAMPLES', join_paths(meson.build_root(), 'doc', 'api', 'examples.dox'))
> -cdata.set('OUTPUT', join_paths(meson.build_root(), 'doc', 'api'))
> +cdata.set('API_EXAMPLES', join_paths(dpdk_build_root, 'doc', 'api', 'examples.dox'))
> +cdata.set('OUTPUT', join_paths(dpdk_build_root, 'doc', 'api'))
>  cdata.set('HTML_OUTPUT', 'html')
> -cdata.set('TOPDIR', meson.source_root())
> -cdata.set('STRIP_FROM_PATH', ' '.join([meson.source_root(), join_paths(meson.build_root(), 'doc', 'api')]))
> +cdata.set('TOPDIR', dpdk_source_root)
> +cdata.set('STRIP_FROM_PATH', ' '.join([dpdk_source_root, join_paths(dpdk_build_root, 'doc', 'api')]))
>  cdata.set('WARN_AS_ERROR', 'NO')
>  if get_option('werror')
>      cdata.set('WARN_AS_ERROR', 'YES')
> diff --git a/kernel/freebsd/meson.build b/kernel/freebsd/meson.build
> index bf5aa20a55..1f612711be 100644
> --- a/kernel/freebsd/meson.build
> +++ b/kernel/freebsd/meson.build
> @@ -9,8 +9,8 @@ kmods = ['contigmem', 'nic_uio']
>  # right now, which allows us to simplify things. We pull in the sourcer
>  # files from the individual meson.build files, and then use a custom
>  # target to call make, passing in the values as env parameters.
> -kmod_cflags = ['-I' + meson.build_root(),
> -        '-I' + join_paths(meson.source_root(), 'config'),
> +kmod_cflags = ['-I' + dpdk_build_root,
> +        '-I' + join_paths(dpdk_source_root, 'config'),
>          '-include rte_config.h']
>
>  # to avoid warnings due to race conditions with creating the dev_if.h, etc.
> diff --git a/kernel/linux/kni/meson.build b/kernel/linux/kni/meson.build
> index c683fc7b36..d3743eeef4 100644
> --- a/kernel/linux/kni/meson.build
> +++ b/kernel/linux/kni/meson.build
> @@ -29,10 +29,10 @@ custom_target('rte_kni',
>              'M=' + meson.current_build_dir(),
>              'src=' + meson.current_source_dir(),
>              ' '.join(['MODULE_CFLAGS=', kmod_cflags,'-include '])
> -            + meson.source_root() + '/config/rte_config.h' +
> -            ' -I' + meson.source_root() + '/lib/eal/include' +
> -            ' -I' + meson.source_root() + '/lib/kni' +
> -            ' -I' + meson.build_root() +
> +            + dpdk_source_root + '/config/rte_config.h' +
> +            ' -I' + dpdk_source_root + '/lib/eal/include' +
> +            ' -I' + dpdk_source_root + '/lib/kni' +
> +            ' -I' + dpdk_build_root +
>              ' -I' + meson.current_source_dir(),
>              'modules'] + cross_args,
>          depends: kni_mkfile,
> diff --git a/meson.build b/meson.build
> index 0a844bce9e..6641d0ed80 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -27,6 +27,8 @@ endif
>
>  # set up some global vars for compiler, platform, configuration, etc.
>  cc = meson.get_compiler('c')
> +dpdk_source_root = meson.current_source_dir()
> +dpdk_build_root = meson.current_build_dir()
>  dpdk_conf = configuration_data()
>  dpdk_libraries = []
>  dpdk_static_libraries = []
> --
> 2.32.0
>
  

24/01/2022 19:12, Jerin Jacob:
> On Mon, Jan 24, 2022 at 11:20 PM Bruce Richardson
> <bruce.richardson@intel.com> wrote:
> >
> > Starting in meson 0.56, the functions meson.source_root() and
> > meson.build_root() are deprecated and to be replaced by the [more
> > descriptive] functions: project_source_root()/global_source_root() and
> > project_build_root()/global_build_root(). Unfortunately, these new
> > replacement functions were only added in 0.56 release too, so to use
> > them we would need version checks for old/new functions to remove the
> > deprecation warnings.
> >
> > However, the functions "current_build_dir()" and "current_source_dir()"
> > remain unaffected by all this, so we can bypass the versioning problem,
> > by saving off these values to "dpdk_source_root" and "dpdk_build_root"
> > in the top-level meson.build file
> >
> > Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> 
> Tested-by: Jerin Jacob <jerinj@marvell.com>

    Bugzilla ID: 926
    Cc: stable@dpdk.org

Applied, thanks.