Add gyp machinery to build with packed ARM relative relocations.

build/android/pack_arm_relocations.gypi

-# Copyright 2013 The Chromium Authors. All rights reserved.
+# Copyright 2014 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.
 
-# This file is meant to be included into an action to provide a rule that strips
-# native libraries.
+# This file is meant to be included into an action to provide a rule that
+# packs ARM relative relocations in native libraries.
 #
 # To use this, create a gyp target with the following form:
 #  {
-#    'action_name': 'strip_native_libraries',
+#    'action_name': 'pack_arm_relocations',
 #    'actions': [
 #      'variables': {
+#        'enable_packing': 'pack relocations if true, otherwise plain file copy'
 #        'ordered_libraries_file': 'file generated by write_ordered_libraries'
 #        'input_paths': 'files to be added to the list of inputs'
 #        'stamp': 'file to touch when the action is complete'
-#        'stripped_libraries_dir': 'directory to store stripped libraries',
-#      },
-#      'includes': [ '../../build/android/strip_native_libraries.gypi' ],
+#        'stripped_libraries_dir': 'directory holding stripped libraries',
+#        'packed_libraries_dir': 'directory holding packed libraries',
+#      'includes': [ '../../build/android/pack_arm_relocations.gypi' ],
 #    ],
 #  },
 #
 
 {
-  'message': 'Stripping libraries for <(_target_name)',
   'variables': {
     'input_paths': [],
   },
   'inputs': [
     '<(DEPTH)/build/android/gyp/util/build_utils.py',
-    '<(DEPTH)/build/android/gyp/strip_library_for_device.py',
+    '<(DEPTH)/build/android/gyp/pack_arm_relocations.py',
+    '<(PRODUCT_DIR)/relocation_packer',
     '<(ordered_libraries_file)',
     '>@(input_paths)',
   ],
   'outputs': [
     '<(stamp)',
   ],
   'conditions': [
+    ['enable_packing == 1', {
+      'message': 'Packing ARM relative relocations for <(_target_name)',
+      'dependencies': [
+        '<(DEPTH)/tools/relocation_packer/relocation_packer.gyp:relocation_packer#host',
+      ],
+    }, {
+      'message': 'Copying libraries (no packing) for <(_target_name)',

[rmcilroy, 2014/06/27 11:14:54]

nit - (no relocation packing)

[simonb (inactive), 2014/06/30 16:23:23]

Done.

[simonb (inactive), 2014/06/30 16:23:23]

Done.

+    }],
     ['component == "shared_library"', {
       # Add a fake output to force the build to always re-run this step. This
       # is required because the real inputs are not known at gyp-time and
       # changing base.so may not trigger changes to dependent libraries.
       'outputs': [ '<(stamp).fake' ]
     }],
   ],
   'action': [
-    'python', '<(DEPTH)/build/android/gyp/strip_library_for_device.py',
-    '--android-strip=<(android_strip)',
-    '--android-strip-arg=--strip-unneeded',
+    'python', '<(DEPTH)/build/android/gyp/pack_arm_relocations.py',
+    '--enable-packing=<(enable_packing)',
+    '--android-pack-relocations=<(PRODUCT_DIR)/relocation_packer',
+    '--android-objcopy=<(android_objcopy)',
     '--stripped-libraries-dir=<(stripped_libraries_dir)',
-    '--libraries-dir=<(SHARED_LIB_DIR)',
+    '--packed-libraries-dir=<(packed_libraries_dir)',
     '--libraries-file=<(ordered_libraries_file)',
     '--stamp=<(stamp)',
   ],
 }