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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 package org.chromium.base.library_loader; | |
| 6 | |
| 7 import org.chromium.base.annotations.SuppressFBWarnings; | |
| 8 | |
| 9 @SuppressFBWarnings | |
| 10 public class NativeLibraries { | |
| 11 /** | |
| 12 * IMPORTANT NOTE: The variables defined here must _not_ be 'final'. | |
| 13 * | |
| 14 * The reason for this is very subtle: | |
| 15 * | |
| 16 * - This template is used to generate several distinct, but similar | |
| 17 * files used in different contexts: | |
| 18 * | |
| 19 * o .../gen/templates/org/chromium/base/library_loader/NativeLibraries.ja
va | |
| 20 * | |
| 21 * This file is used to build base.jar, which is the library | |
| 22 * jar used by chromium projects. However, the | |
| 23 * corresponding NativeLibraries.class file will _not_ be part | |
| 24 * of the final base.jar. | |
| 25 * | |
| 26 * o .../$PROJECT/native_libraries_java/NativeLibraries.java | |
| 27 * | |
| 28 * This file is used to build an APK (e.g. $PROJECT | |
| 29 * could be 'content_shell_apk'). Its content will depend on | |
| 30 * this target's specific build configuration, and differ from | |
| 31 * the source file above. | |
| 32 * | |
| 33 * - During the final link, all .jar files are linked together into | |
| 34 * a single .dex file, and the second version of NativeLibraries.class | |
| 35 * will be put into the final output file, and used at runtime. | |
| 36 * | |
| 37 * - If the variables were defined as 'final', their value would be | |
| 38 * optimized out inside of 'base.jar', and could not be specialized | |
| 39 * for every chromium program. This, however, doesn't apply to arrays of | |
| 40 * strings, which can be defined as final. | |
| 41 * | |
| 42 * This exotic scheme is used to avoid injecting project-specific, or | |
| 43 * even build-specific, values into the base layer. E.g. this is | |
| 44 * how the component build is supported on Android without modifying | |
| 45 * the sources of each and every Chromium-based target. | |
| 46 */ | |
| 47 | |
| 48 #if defined(ENABLE_CHROMIUM_LINKER_LIBRARY_IN_ZIP_FILE) && \ | |
| 49 !defined(ENABLE_CHROMIUM_LINKER) | |
| 50 #error "Must have ENABLE_CHROMIUM_LINKER to enable library in zip file" | |
| 51 #endif | |
| 52 | |
| 53 // Set to true to enable the use of the Chromium Linker. | |
| 54 #if defined(ENABLE_CHROMIUM_LINKER) | |
| 55 public static boolean sUseLinker = true; | |
| 56 #else | |
| 57 public static boolean sUseLinker = false; | |
| 58 #endif | |
| 59 | |
| 60 #if defined(ENABLE_CHROMIUM_LINKER_LIBRARY_IN_ZIP_FILE) | |
| 61 public static boolean sUseLibraryInZipFile = true; | |
| 62 #else | |
| 63 public static boolean sUseLibraryInZipFile = false; | |
| 64 #endif | |
| 65 | |
| 66 #if defined(ENABLE_CHROMIUM_LINKER_TESTS) | |
| 67 public static boolean sEnableLinkerTests = true; | |
| 68 #else | |
| 69 public static boolean sEnableLinkerTests = false; | |
| 70 #endif | |
| 71 | |
| 72 // This is the list of native libraries to be loaded (in the correct order) | |
| 73 // by LibraryLoader.java. The base java library is compiled with no | |
| 74 // array defined, and then the build system creates a version of the file | |
| 75 // with the real list of libraries required (which changes based upon which | |
| 76 // .apk is being built). | |
| 77 // TODO(cjhopman): This is public since it is referenced by NativeTestActivi
ty.java | |
| 78 // directly. The two ways of library loading should be refactored into one. | |
| 79 public static final String[] LIBRARIES = | |
| 80 #if defined(NATIVE_LIBRARIES_LIST) | |
| 81 NATIVE_LIBRARIES_LIST; | |
| 82 #else | |
| 83 {}; | |
| 84 #endif | |
| 85 | |
| 86 // This is the expected version of the 'main' native library, which is the o
ne that | |
| 87 // implements the initial set of base JNI functions including | |
| 88 // base::android::nativeGetVersionName() | |
| 89 static String sVersionNumber = | |
| 90 #if defined(NATIVE_LIBRARIES_VERSION_NUMBER) | |
| 91 NATIVE_LIBRARIES_VERSION_NUMBER; | |
| 92 #else | |
| 93 ""; | |
| 94 #endif | |
| 95 } | |
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