新版本CrystaX NDK 10.3.2已发布, 提供了很多新功能和改进; 请尽量使用最新版本.
说明
Here is customized distribution of Android NDK r7 which I have rebuilt from official sources. Starting from NDK r5, Google added support of C++ exceptions, RTTI and STL to the official NDK. That's good but not enough for many peoples including me. Starting from r5-crystax-1, main goal of this project will be improvements of official NDK (after all, this is the best way to integrate such improvements into mainline - that's how it was with full C++ support in Google's NDK).
Features supported by CrystaX NDK:
- Wide characters.
Google's NDK doesn't support wide chars properly - neither in C or C++. Using CrystaX NDK you get full standard compliant wide characters support. You can easily port existing code which use wide characters/strings/streams or write new one. - New 4.6.3 toolchain
Starting from r7-crystax-1, CrystaX NDK contains two versions of compiler toolchain: 4.4.3 (old one, the same as Google use) and 4.6.3 (new one).
New toolchain contains GCC 4.6.3 with enabled Graphite framework allowing gcc do high-level memory optimizations.
By default 4.6.3 toolchain is not enabled. That's done to be compatible with Google's NDK. To enable it for your application, just add following to the app's Application.mk:APP_TOOLCHAIN_VERSION := 4.6.3
- C++11 support (formerly known as C++0x)
Google's NDK offer GCC 4.4.3 which is good compiler but doesn't support some modern features. One of such features is support of new International Standard known as C++11 (formerly known as C++0x). There is very limited support of C++0x features in GCC 4.4.3.
Using CrystaX NDK you can start use many of new C++0x features right now. Of course, there is no yet full C++11 support in GCC 4.6.3 but GCC team works very intensively on that and it already contains many very usable features (lambdas, decltype, auto and many others). To see full list of C++0x features supported, look to GCC C++ Support page.
To use C++0x features in your project, just add following to the app's Application.mk:APP_USE_CPP0X := true
Note that in this case new 4.6.3 toolchain implicitly selected. - Objective-C support
The only languages Google NDK supports are C and C++. Starting from r7-crystax-4, CrystaX NDK support additionally Objective-C. This is experimental feature, but at least core language works fine. Of course, just core language is not enough; peoples who use Objective-C, rely on libraries like Cocoa (formerly known as NeXTSTEP/OpenStep). I understand that and don't stop on this stage. I've planned port GNUStep on Android, but this is not so easy task and it can't be done quickly. In the meantime I suppose many peoples could start using Objective-C as is.
To start using Objective-C in your project, just add source files with extension .m (Objective-C) or .mm (Objective-C++) and specify them in LOCAL_SRC_FILES in Android.mk. - Static code analysis
Android NDK uses GCC which analyze code pretty good and warn about potential errors (especially with -Wall -Wextra) but, as every developer knows, there could not be reviews enough. Really, sometime we do absolutely dumb mistakes and pass them to the production. To decrease number of such mistakes, experienced developers uses static code analyzers. There are many such tools (open source and proprietary) so choice is not easy.
Clang project offer code analyzer which is pretty good in many situations. This is the same analyzer known to Apple developers through "Build and analyze" XCode's menu item. With CrystaX NDK, you can start use it with Android too. To do that, you need install clang and ensure you have 'scan-build' script from Clang distribution accessible from command-line. Then, start build your project:ndk-build ANALYZE=1
I plan support more static code analyzers but have not specific plans yet. - To be continued...
Seriously, if you don't see some feature here, request me to do that! Use my issue/bug tracker to report bugs or feature requests. I would be glad to implement such features if many of peoples need them. And, of course, contributes are welcome!
授权
CrystaX NDK包含若干开源许可证. 详见每个模块的版权声明文件.
请注意CrystaX NDK发布包中也包括编译器,链接器,文档等的预编译二进制文件. 工具链的源码在GitHub (你可以使用编译脚本自动下载它).
预编译的GCC和其他二进制文件(GDB, binutils 等等)基于the GNU General Public License (GPL) 或 the GNU Lesser General Public License (LGPL). 详见COPYING和COPYING.LIB,位于 $NDK/toolchains/$tc/prebuilt/$system.
预编译的LLVM/Clang工具链基于 LLVM "BSD" license.
基本上, 授权规则等同于Google's Android NDK - 例如, 允许商业&非商业用途. 唯一区别是CrystaX部分, 基于 BSD 2-clause license.
下载
操作指南
You can also build your own distribution if you don't want to use my prebuilt versions. To do that, follow instructions below.
Setting up build environment:
Follow instructions from AOSP site except Java part.WARNING!!! Starting from r5, NDK can be built only on Linux/Mac machines. Windows build is not more supported! However, Windows binaries can be built on Linux using so called "cross-canadian build". To do that, you need install mingw32 package; build script will detect it and build Windows binaries automatically.
Instructions
- Download build script and run it:
wget -O - http://www.crystax.net/download/ndk-crystax-r7-build.sh | /bin/sh
It might take long time, up to several hours. When script will be finished, it'll print directory containing package with NDK release. - Use this package as replacement of Google's NDK!
