Linux: add option to link libpci directly instead of using dlopen.

build/linux/system.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'conditions': [
       ['sysroot!=""', {
         'pkg-config': './pkg-config-wrapper "<(sysroot)" "<(target_arch)"',
       }, {
@@ skipping 257 matching lines @@
                 'libraries': [
                   '-ldl',
                 ],
               }],
             ],
           },
         }],
       ],
     },
     {
+      'target_name': 'libpci',
+      'type': 'none',
+      'direct_dependent_settings': {
+        'cflags': [
+          '<!@(<(pkg-config) --cflags libpci)',
+        ],
+        'conditions': [
+          ['linux_link_libpci==0', {
+            'defines': ['DLOPEN_LIBPCI'],
+          }],
+        ],
+      },
+      'link_settings': {
+        'conditions': [
+          ['linux_link_libpci==0 and OS=="linux"', {
+            'libraries': [
+              '-ldl',
+            ],
+          }],
+          ['linux_link_libpci==1', {
+            'ldflags': [
+              '<!@(<(pkg-config) --libs-only-L --libs-only-other libpci)',
+            ],
+            'libraries': [
+              '<!@(<(pkg-config) --libs-only-l libpci)',
+            ],
+          }],
+        ],
+      },
+    },
+    {
       'target_name': 'x11',
       'type': 'none',
       'toolsets': ['host', 'target'],
       'conditions': [
         ['_toolset=="target"', {
           'direct_dependent_settings': {
             'cflags': [
               '<!@(<(pkg-config) --cflags x11)',
             ],
           },
@@ skipping 319 matching lines @@
             ],
             'libraries': [
               '<!@(<(pkg-config) --libs-only-l libudev)',
             ],
           },
         }],
       ],
     },
   ],
 }