build: support disabling drivers with meson

Add support for a new build option to turn off certain drivers. Any other
drivers which depend on the one being disabled will also be disabled with a
suitable debug message.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Acked-by: Luca Boccassi <bluca@debian.org>
Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/drivers/meson.build b/drivers/meson.build
index e637118..4a1cb8b 100644 (file)
--- a/drivers/meson.build
+++ b/drivers/meson.build
@@ -16,6 +16,8 @@ dpdk_driver_classes = ['common',
               'baseband', # depends on common and bus.
               'raw']     # depends on common, bus, mempool, net and event.
 
+disabled_drivers = get_option('disable_drivers').split(',')
+
 default_cflags = machine_args
 if cc.has_argument('-Wno-format-truncation')
        default_cflags += '-Wno-format-truncation'
@@ -59,17 +61,23 @@ foreach class:dpdk_driver_classes
                # pull in driver directory which should assign to each of the above
                subdir(drv_path)
 
-               if build
+               if drv_path in disabled_drivers
+                       build = false
+                       reason = 'Explicitly disabled via build config'
+               elif build
                        # get dependency objs from strings
                        shared_deps = ext_deps
                        static_deps = ext_deps
                        foreach d:deps
                                if not is_variable('shared_rte_' + d)
-                                       error('Missing internal dependency "@0@" for @1@ [@2@]'
+                                       build = false
+                                       reason = 'Missing internal dependency, "@0@"'.format(d)
+                                       message('Disabling @1@ [@2@]: missing internal dependency "@0@"'
                                                        .format(d, name, 'drivers/' + drv_path))
+                               else
+                                       shared_deps += [get_variable('shared_rte_' + d)]
+                                       static_deps += [get_variable('static_rte_' + d)]
                                endif
-                               shared_deps += [get_variable('shared_rte_' + d)]
-                               static_deps += [get_variable('static_rte_' + d)]
                        endforeach
                endif
 

diff --git a/meson_options.txt b/meson_options.txt
index 448f3e6..89650b0 100644 (file)
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -2,6 +2,8 @@
 
 option('allow_invalid_socket_id', type: 'boolean', value: false,
        description: 'allow out-of-range NUMA socket id\'s for platforms that don\'t report the value correctly')
+option('disable_drivers', type: 'string', value: '',
+       description: 'Comma-separated list of drivers to explicitly disable.')
 option('drivers_install_subdir', type: 'string', value: 'dpdk/pmds-<VERSION>',
        description: 'Subdirectory of libdir where to install PMDs. Defaults to using a versioned subdirectory.')
 option('enable_docs', type: 'boolean', value: false,