On 17-Oct-19 9:44 AM, Bruce Richardson wrote:
On Wed, Oct 16, 2019 at 06:03:36PM +0100, Anatoly Burakov wrote:
From: Marcin Baran <marcinx.ba...@intel.com>

As per new ABI policy, all of the libraries are now versioned using
one global ABI version. Changes in this patch implement the
necessary steps to enable that.

Signed-off-by: Marcin Baran <marcinx.ba...@intel.com>
Signed-off-by: Pawel Modrak <pawelx.mod...@intel.com>
Signed-off-by: Anatoly Burakov <anatoly.bura...@intel.com>
---

Notes:
     v3:
     - Removed Windows support from Makefile changes
     - Removed unneeded path conversions from meson files

  buildtools/meson.build |  2 ++
  config/ABI_VERSION     |  1 +
  config/meson.build     |  5 +++--
  drivers/meson.build    | 20 ++++++++++++--------
  lib/meson.build        | 18 +++++++++++-------
  meson_options.txt      |  2 --
  mk/rte.lib.mk          | 13 ++++---------
  7 files changed, 33 insertions(+), 28 deletions(-)
  create mode 100644 config/ABI_VERSION

diff --git a/buildtools/meson.build b/buildtools/meson.build
index 32c79c1308..78ce69977d 100644
--- a/buildtools/meson.build
+++ b/buildtools/meson.build
@@ -12,3 +12,5 @@ if python3.found()
  else
        map_to_def_cmd = ['meson', 'runpython', files('map_to_def.py')]
  endif
+
+is_experimental_cmd = [find_program('grep', 'findstr'), '^DPDK_']
diff --git a/config/ABI_VERSION b/config/ABI_VERSION
new file mode 100644
index 0000000000..9a7c1e503f
--- /dev/null
+++ b/config/ABI_VERSION
@@ -0,0 +1 @@
+20.0
diff --git a/config/meson.build b/config/meson.build
index a27f731f85..3cfc02406c 100644
--- a/config/meson.build
+++ b/config/meson.build
@@ -17,7 +17,8 @@ endforeach
  # set the major version, which might be used by drivers and libraries
  # depending on the configuration options
  pver = meson.project_version().split('.')
-major_version = '@0@.@1@'.format(pver.get(0), pver.get(1))
+abi_version = run_command(find_program('cat', 'more'),
+       files('ABI_VERSION')).stdout().strip()
# extract all version information into the build configuration
  dpdk_conf.set('RTE_VER_YEAR', pver.get(0).to_int())
@@ -37,7 +38,7 @@ endif
pmd_subdir_opt = get_option('drivers_install_subdir')
  if pmd_subdir_opt.contains('<VERSION>')
-       pmd_subdir_opt = major_version.join(pmd_subdir_opt.split('<VERSION>'))
+       pmd_subdir_opt = abi_version.join(pmd_subdir_opt.split('<VERSION>'))
  endif

This is an interesting change, and I'm not sure about it. I think for
user-visible changes, version should still refer to DPDK version rather
than ABI version. Even with a stable ABI, it makes more sense to me to find
the drivers in a 19.11 directory than a 20.0 one. Then again, the drivers
should be re-usable across the one ABI version, so perhaps this is the best
approach.

Thoughts from others? Luca or Kevin, any thoughts from a packagers
perspective?

/Bruce

I can certainly change it back. This wasn't intentional - i just did a search-and-replace without thinking too much about it :)

--
Thanks,
Anatoly

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