[PATCH v2] build: make gpudev optional

[<eagostini@nvidia.com>]

From: Elena Agostini <eagostini@nvidia.com>

This library can be made optional.
drivers/gpu and app/test-gpudev depend on this library,
so there is a check for dependencies.

Signed-off-by: Elena Agostini <eagostini@nvidia.com>
---
 app/test-gpudev/meson.build      | 1 +
 doc/guides/prog_guide/gpudev.rst | 1 +
 drivers/gpu/meson.build          | 1 +
 lib/meson.build                  | 1 +
 4 files changed, 4 insertions(+)

diff --git a/app/test-gpudev/meson.build b/app/test-gpudev/meson.build
index 17bdef3646..02286d3a6a 100644
--- a/app/test-gpudev/meson.build
+++ b/app/test-gpudev/meson.build
@@ -3,3 +3,4 @@
 
 sources = files('main.c')
 deps = ['gpudev', 'ethdev']
+
diff --git a/doc/guides/prog_guide/gpudev.rst b/doc/guides/prog_guide/gpudev.rst
index e464109d35..8970c43865 100644
--- a/doc/guides/prog_guide/gpudev.rst
+++ b/doc/guides/prog_guide/gpudev.rst
@@ -23,6 +23,7 @@ Out of scope of this library is to provide a wrapper for GPU specific libraries
 on the device or create GPU specific objects
 (e.g. CUDA Driver context or CUDA Streams in case of NVIDIA GPUs).
 
+This library is set as optional and can be disabled with ``-Ddisable_libs=gpudev``.
 
 Features
 --------
diff --git a/drivers/gpu/meson.build b/drivers/gpu/meson.build
index 601bedcd61..1e68a7746d 100644
--- a/drivers/gpu/meson.build
+++ b/drivers/gpu/meson.build
@@ -2,3 +2,4 @@
 # Copyright (c) 2021 NVIDIA Corporation & Affiliates
 
 drivers = [ 'cuda' ]
+
diff --git a/lib/meson.build b/lib/meson.build
index dad9fce14d..018976df17 100644
--- a/lib/meson.build
+++ b/lib/meson.build
@@ -67,6 +67,7 @@ libraries = [
 
 optional_libs = [
         'bitratestats',
+        'gpudev',
         'gro',
         'gso',
         'kni',
-- 
2.17.1