Linux: Dynamically load libudev.

build/linux/system.gyp

Index: build/linux/system.gyp
diff --git a/build/linux/system.gyp b/build/linux/system.gyp
index 3e880939f8444ea57a743467361901a13ea99a48..cd0288beeb63cfba8ef9d6603a3fc2791388ec40 100644
--- a/build/linux/system.gyp
+++ b/build/linux/system.gyp
@@ -20,6 +20,69 @@
     'linux_link_libpci%': 0,
     'linux_link_libspeechd%': 0,
     'linux_link_libbrlapi%': 0,
+
+    # Used below for the various libraries. In this scope for sharing with GN.
+    'libbrlapi_functions': [
+      'brlapi_getHandleSize',
+      'brlapi_error_location',
+      'brlapi_strerror',
+      'brlapi__acceptKeys',
+      'brlapi__openConnection',
+      'brlapi__closeConnection',
+      'brlapi__getDisplaySize',
+      'brlapi__enterTtyModeWithPath',
+      'brlapi__leaveTtyMode',
+      'brlapi__writeDots',
+      'brlapi__readKey',
+    ],
+    'libgio_functions': [
+      'g_settings_new',
+      'g_settings_get_child',
+      'g_settings_get_string',
+      'g_settings_get_boolean',
+      'g_settings_get_int',
+      'g_settings_get_strv',
+      'g_settings_list_schemas',
+    ],
+    'libpci_functions': [
+      'pci_alloc',
+      'pci_init',
+      'pci_cleanup',
+      'pci_scan_bus',
+      'pci_fill_info',
+      'pci_lookup_name',
+    ],
+    'libudev_functions': [
+      'udev_device_get_action',
+      'udev_device_get_devnode',
+      'udev_device_get_parent',
+      'udev_device_get_parent_with_subsystem_devtype',
+      'udev_device_get_property_value',
+      'udev_device_get_subsystem',
+      'udev_device_get_sysattr_value',
+      'udev_device_get_sysname',
+      'udev_device_get_syspath',
+      'udev_device_new_from_devnum',
+      'udev_device_new_from_syspath',
+      'udev_device_unref',
+      'udev_enumerate_add_match_subsystem',
+      'udev_enumerate_get_list_entry',
+      'udev_enumerate_new',
+      'udev_enumerate_scan_devices',
+      'udev_enumerate_unref',
+      'udev_list_entry_get_next',
+      'udev_list_entry_get_name',
+      'udev_monitor_enable_receiving',
+      'udev_monitor_filter_add_match_subsystem_devtype',
+      'udev_monitor_get_fd',
+      'udev_monitor_new_from_netlink',
+      'udev_monitor_receive_device',
+      'udev_monitor_unref',
+      'udev_new',
+      'udev_set_log_fn',
+      'udev_set_log_priority',
+      'udev_unref',
+    ],
   },
   'conditions': [
     [ 'chromeos==0 and use_ozone==0', {
@@ -445,22 +508,67 @@
       'targets': [
         {
           'target_name': 'udev',
-          'type': 'none',
+          'type': 'static_library',
           'conditions': [
             ['_toolset=="target"', {
-              'direct_dependent_settings': {
-                'cflags': [
-                  '<!@(<(pkg-config) --cflags libudev)'
-                ],
-              },
-              'link_settings': {
-                'ldflags': [
-                  '<!@(<(pkg-config) --libs-only-L --libs-only-other libudev)',
-                ],
-                'libraries': [
-                  '<!@(<(pkg-config) --libs-only-l libudev)',
-                ],
-              },
+              'include_dirs': [
+                '../..',
+              ],
+              'hard_dependency': 1,
+              'actions': [
+                {
+                  'variables': {
+                    'output_h': '<(SHARED_INTERMEDIATE_DIR)/library_loaders/libudev0.h',
+                    'output_cc': '<(INTERMEDIATE_DIR)/libudev0_loader.cc',
+                    'generator': '../../tools/generate_library_loader/generate_library_loader.py',
+                  },
+                  'action_name': 'generate_libudev0_loader',
+                  'inputs': [
+                    '<(generator)',
+                  ],
+                  'outputs': [
+                    '<(output_h)',
+                    '<(output_cc)',
+                  ],
+                  'action': ['python',
+                             '<(generator)',
+                             '--name', 'LibUdev0Loader',
+                             '--output-h', '<(output_h)',
+                             '--output-cc', '<(output_cc)',
+                             '--header', '"third_party/libudev/libudev0.h"',
+                             '--link-directly=0',
+                             '<@(libudev_functions)',
+                  ],
+                  'message': 'Generating libudev0 library loader',
+                  'process_outputs_as_sources': 1,
+                },
+                {
+                  'variables': {
+                    'output_h': '<(SHARED_INTERMEDIATE_DIR)/library_loaders/libudev1.h',
+                    'output_cc': '<(INTERMEDIATE_DIR)/libudev1_loader.cc',
+                    'generator': '../../tools/generate_library_loader/generate_library_loader.py',
+                  },
+                  'action_name': 'generate_libudev1_loader',
+                  'inputs': [
+                    '<(generator)',
+                  ],
+                  'outputs': [
+                    '<(output_h)',
+                    '<(output_cc)',
+                  ],
+                  'action': ['python',
+                             '<(generator)',
+                             '--name', 'LibUdev1Loader',
+                             '--output-h', '<(output_h)',
+                             '--output-cc', '<(output_cc)',
+                             '--header', '"third_party/libudev/libudev1.h"',
+                             '--link-directly=0',
+                             '<@(libudev_functions)',
+                  ],
+                  'message': 'Generating libudev1 library loader',
+                  'process_outputs_as_sources': 1,
+                },
+              ],
             }],
           ],
         },
@@ -520,12 +628,7 @@
                          # and get it fixed so that we don't need --use-extern-c.
                          '--use-extern-c',
                          '--link-directly=<(linux_link_libpci)',
-                         'pci_alloc',
-                         'pci_init',
-                         'pci_cleanup',
-                         'pci_scan_bus',
-                         'pci_fill_info',
-                         'pci_lookup_name',
+                         '<@(libpci_functions)',
               ],
               'message': 'Generating libpci library loader',
               'process_outputs_as_sources': 1,
@@ -706,13 +809,7 @@
                          '--output-cc', '<(output_cc)',
                          '--header', '<gio/gio.h>',
                          '--link-directly=<(linux_link_gsettings)',
-                         'g_settings_new',
-                         'g_settings_get_child',
-                         'g_settings_get_string',
-                         'g_settings_get_boolean',
-                         'g_settings_get_int',
-                         'g_settings_get_strv',
-                         'g_settings_list_schemas',
+                         '<@(libgio_functions)',
               ],
               'message': 'Generating libgio library loader',
               'process_outputs_as_sources': 1,
@@ -882,17 +979,7 @@
                      '--output-cc', '<(output_cc)',
                      '--header', '<brlapi.h>',
                      '--link-directly=<(linux_link_libbrlapi)',
-                     'brlapi_getHandleSize',
-                     'brlapi_error_location',
-                     'brlapi_strerror',
-                     'brlapi__acceptKeys',
-                     'brlapi__openConnection',
-                     'brlapi__closeConnection',
-                     'brlapi__getDisplaySize',
-                     'brlapi__enterTtyModeWithPath',
-                     'brlapi__leaveTtyMode',
-                     'brlapi__writeDots',
-                     'brlapi__readKey',
+                     '<@(libbrlapi_functions)',
           ],
           'message': 'Generating libbrlapi library loader',
           'process_outputs_as_sources': 1,