    Android NDK ChangeLog:

    -------------------------------------------------------------------------------
    android-ndk-r5c

    OTHER FIXES & CHANGES:

    - ndk-build: Fix a rare bug that appeared when trying to perform parallel
      builds of debuggable projects.

    This release fixes a few bugs in r5b. There are no new features.

    IMPORTANT BUG FIXES:

    - Fixed a typo that prevented LOCAL_WHOLE_STATIC_LIBRARIES to work correctly
      with the new toolchain. Also properly document this variable in
      docs/ANDROID-MK.html.

    - Fixed a bug where code linked against gnustl_static would crash when run
      on Android platform releases older than 2.2.

    - <android/input.h>: Two functions in this header file, introduced
      by API level 9 (a.k.a. 2.3) were incorrect and have been fixed. While
      this breaks the source API, the binary interface to the system is
      unchanged.

      The functions missing a third 'history_index' parameter. They correct
      definition is now:

          float AMotionEvent_getHistoricalRawX(const AInputEvent* motion_event,
                                               size_t pointer_index,
                                               size_t history_index);

          float AMotionEvent_getHistoricalRawY(const AInputEvent* motion_event,
                                               size_t pointer_index,
                                               size_t history_index);

    - Updated the android-9 C library arm binary to correctly expose at link time
      new functions that were added to it in Gingerbread (e.g. pthread_rwlock_init).

    OTHER FIXES & CHANGES:

    - Object files are now always linked in the order they appear in
      LOCAL_SRC_FILES. This was not the case previously because the files
      were grouped by source extensions instead.

    - download-toolchain-sources.sh: Fixed a silly bug that prevented the
      --git-date option to work properly when downloading the master branch.

    - Fix an issue where a module could import itself, resulting in an infinite
      loop in GNU Make.

    - When import-module fails, it now prints the list of directories
      that were searched. This is useful to check that the NDK_MODULE_PATH
      definition used by the build system is correct.

    - When import-module succeeds, it now prints the directory where the module
      was found to the log (visible with NDK_LOG=1).

    - <pthread.h>: Fixed the definition of PTHREAD_RWLOCK_INITIALIZER for
      android-9 API level and higher.

    - Fixed a bug where LOCAL_ARM_NEON was defined to true would make the build
      fail (typo in build/core/build-binary.mk)

    - Fixed a bug that prevented the compilation of .s assembly files
      (.S files were ok).

    - Speed-up the build of debuggable applications when there is a very
      large number of include directories in a project.

    - ndk-gdb: Better detection of 'adb shell' failures (improves error messages).

    -------------------------------------------------------------------------------
    android-ndk-r5b

    This release fixes a few bugs in r5. There are no new features.

    IMPORTANT BUG FIXES:

    - Fix a compiler bug in the arm-linux-androideabi-4.4.3 toolchain.
      The previous binary generated invalid thumb instruction sequences when
      dealing with signed chars. This problem was first reported on the
      android-ndk forum and fixed by the following change in the toolchain
      sources:

            https://review.source.android.com/#change,19474

    - docs/CPLUSPLUS-SUPPORT.html: Add missing documentation for the
      "gnustl_static" value for APP_STL, that allows you to link against
      a static library version of GNU libstdc++.

    - ndk-build: Fix a bug that created inconsistent dependency files when a
      compilation error occured on Windows, preventing building properly after
      the error was fixed in the source code.

    - ndk-build: Fix a Cygwin-specific bug where using very short paths for
      the Android NDK installation or the project path could lead to the
      generation of invalid dependency files, making incremental builds
      impossible.

    - Fix a typo that prevented the cpufeatures library to work correctly
      with the new NDK toolchain.

    - Linux toolchain binaries now run on Ubuntu 8.04 or higher.
      More specifically, the r5 binaries did require GLibc 2.11 on the host
      system, and refused to run with previous releases due to an ABI mismatch
      in the GNU C Library. The r5b binaries are generated with a special
      toolchain that instead targets GLibc 2.7 or higher.

    - GNU libstdc++ will not crash anymore when printing floating-point values
      through i/o streams.

    OTHER FIXES & CHANGES:

    - ndk-build: Speed-up the Cygwin build by avoiding calling "cygpath -m"
      from GNU Make for each and every source or object file. This was a problem
      for users with very large source trees.

      In case this doesn't work properly, define NDK_USE_CYGPATH=1 in your
      environment to use 'cygpath -m' as usual.

      Also, if 'cygpath' is not in your path, completely ignore it
      (seems to be enough to run the NDK under MSys).

    - ndk-build: Handle installation paths containing spaces when checking
      cygwin installation. Before that, the script complained that the user
      was using an incorrect version of GNU Make (even if he had the right one).

    - Fixed a typo that prevented several NDK_MODULE_PATH to work properly when
      it contained multiple directories separated with ":"

    - prebuilt-common.sh: Make the script check the compiler directly for 64-bit
      generated machine code, instead of relying on the host tag. That should
      allow the 32-bit toolchain to rebuild properly on Snow Leopard.

    - prebuilt-common.sh: Fix the toolchain rebuild scripts to work when
      using a 32-bit host toolchain.

    - <netinet/in.h>: Add missing declaration for INET_ADDRSTRLEN
    - <netinet/in6.h>: Add missing declaration for IN6_IS_ADDR_MC_NODELOCAL
      and IN6_IS_ADDR_MC_GLOBAL.

    - <asm/byteorder.>: Replaced 'asm' with '__asm__' to allow compilation
      with -std=c99. See https://review.source.android.com/#change,20076

    - standalone toolchain: The -fpic flag is now the default for the
      arm-linux-androideabi toolchain, instead of -fPIC. This avoids a performance
      degradation when compared to the old android-eabi configuration.

      This only affects users of the standalone toolchain. The NDK build script
      always enforced -fpic implicitely.

    -------------------------------------------------------------------------------
    android-ndk-r5

    IMPORTANT BUG FIXES:

    - Allow dlclose() to properly call static C++ destructors when unloading
      a shared library. This requires changes in both the C library and the
      build system. IMPORTANT: This feature is only available for API level 9.

    - Fix packaging error for system libraries of level 5 and 8. The libraries
      bundled with the NDK and used at link time were not the correct version,
      and this prevented linking against certain symbols appropriately.

    - ndk-gdb: do not start activity unless --start or --launch is used.
      (the documentation was correct, the implementation wrong)

    - The system headers for all API levels have been cleaned up and will
      not provide the declarations of functions that are not available in
      the corresponding system libraries.

    IMPORTANT CHANGES:

    - Support for API level 9, (a.k.a. Android 2.3) which adds the following
      native features to the platform:

         - Native audio API based on the Khronos Group OpenSL ES™ 1.0.1 Standard.
           New headers <SLES/OpenSLES.h> and <SLES/OpenSLES_Android.h>
           are provided to allow applications targeting this API level to perform
           audio input, output and processing directly from native code.

         - Native activity support, i.e. the ability to build applications that
           are coded entirely in C or C++. More precisely, such applications still
           run inside a VM, and will have to access most of the platform's features
           using JNI (i.e. native code calling VM methods). However, this also
           comes with a series of headers and libraries to implement the following
           directly from native code:

              - activity lifecycle management.
              - user input handling (touch, keyboard, trackball, ...).
              - window management (including accessing the pixel buffer).
              - sensor listeners (e.g. accelerometer, compass, ...).
              - hardware configuration management.
              - easily reading assets out of an APK from native code.
              - access to the storage manager, a new feature of Android X.X
                that allows one to provide Opaque Binary Objects containing
                large amounts of data outside of the APK.

           See the documentation in docs/STABLE-APIS.html for more details.

           Note that most of these new features are targeted at game developers.

    - Improved gdbserver binary to allow debugging _threaded_ programs properly
      with ndk-gdb (the previous binary could only set breakpoints on the main
      thread).

      IMPORTANT: THIS ONLY WORKS IF YOU RUN ON ANDROID 2.3 OR HIGHER.

      The root cause of the problem is a platform bug that was only fixed in
      2.3. If you try to debug on a previous platform, the gdbserver binary
      will only be able to set breakpoints on the main thread.

      For more information, see the specific section in docs/NDK-GDB.html.

    - Easier debuggable builds: just invoke ndk-build while defining the
      NDK_DEBUG variable to 1, as in:

          $NDK/ndk-build NDK_DEBUG=1

      This will have the same result that setting the android:debuggable="true"
      in the <application> element of your AndroidManifest.xml file. See the
      file docs/NDK-BUILD.html for more details.

      Note that you will need to use the SDKr8 build tools to use this feature
      properly!

    - Refresh of system C++ headers:

         - Headers have been moved out of the platform directory hierarchy.
           This is to prevent conflicts with other STLs like STLport or the
           GNU libstdc++ which provide their own version of the headers, but
           does not affect your builds.

         - The list of headers has grown to include the following:

                cassert, cctype, cerrno, cfloat, climits, cmath,
                csetjmp, csignal, cstddef, cstdint, cstdio, cstdlib,
                cstring, ctime, cwchar, new, typeinfo, utility

        Note that they still correspond to our minimal C++ runtime, no new feature
        was introduced here.

    - Support for C++ exceptions and RTTI. See docs/CPLUSPLUS-SUPPORT.html for
      all details (and limitations).

    - STLport implementation: Add sources and prebuilt binaries for a port of
      the STLport C++ Standard Library (www.stlport.org), and an easy way to use
      it at build time by defining APP_STL in your Application.mk. See
      docs/APPLICATION-MK.html and docs/CPLUSPLUS-SUPPORT.html for all details.

    - GNU libstdc++ implementation: Available as a static library that you can
      select for your application through APP_STL. See docs/CPLUSPLUS-SUPPORT.html
      for all details.

    - Add support for prebuilt libraries with the PREBUILT_SHARED_LIBRARY and
      PREBUILT_STATIC_LIBRARIES build scripts. See the new documentation
      file named docs/PREBUILTS.html for explanations and usage examples.

    - Support for module exports: A module can now define a set of compiler or
      linker flags that will be automatically 'imported' by any other module that
      depends on it, through LOCAL_STATIC_LIBRARIES or LOCAL_SHARED_LIBRARIES.

      This is achieved with the help of new Android.mk variables named
      LOCAL_EXPORT_CFLAGS, LOCAL_EXPORT_CPPFLAGS, LOCAL_EXPORT_C_INCLUDES and
      LOCAL_EXPORT_LDLIBS. See docs/ANDROID-MK.html for mode documentation, and
      a 'samples/module-exports' for a sample project that uses this.

    - Add support to specify a different file name for generated files, through
      the new LOCAL_MODULE_FILENAME variable. See docs/ANDROID-MK.html for an
      example.

    - Add support for module imports, through the NDK_MODULE_PATH environment
      variable and the new 'import-module' function. This allows you to avoid
      hard-coding the path of third-party modules into your project files.

      See docs/IMPORT-MODULE.html for details.

    - Add the content of LOCAL_C_INCLUDES to gdb.setup to make native debugging
      easier. Also fixes an issue that prevented clean parallel builds of
      debuggable applications to work correctly. This fixes an error message that
      said:

          /bin/sh: <project>/libs/armeabi/gdb.setup: No such file or directory

      When doing a "ndk-build -j<number>", with <number> bigger than 1.

    - Add support for assembly-level source filtering. See the description of
      LOCAL_FILTER_ASM in docs/ANDROID-MK.html for more details. This can be useful
      for certain kinds of obfuscation tasks.

    - This NDK comes with a new toolchain (named arm-linux-androideabi-4.4.3)
      which provides many benefits, including:

         - Better code generation than the previous one (gcc-4.4.0)
         - On Windows, the binaries do not depend on Cygwin anymore.
         - The ability to use it as a stand-alone cross-compiler
           (see docs/STANDALONE-TOOLCHAIN.html for all details).

      The binaries for gcc-4.4.0 are still provided for backwards compatibility.
      Use NDK_TOOLCHAIN=arm-eabi-4.4.0 in your environment to force its usage.
      Note that it is now deprecated and will be removed in a future NDK release.

      IMPORTANT: The old toolchain doesn't properly support exceptions, RTTI,
                 STLport and GNU libstdc++.

      The binaries for the already-deprecated gcc-4.2.1 have been removed.

    - The 'cpufeatures' library has been updated to provide better architecture
      and features detection (including a work-around for buggy ARMv6 kernels
      which report an architecture version of 7).

      The library is now also available as an import module, to simplify its
      usage in your build scripts. See the updated docs/CPU-FEATURES.html file
      for details.

      NOTE: Please update your Android.mk to use module imports as soon as
            possible. The location $NDK/source/cpufeatures/ is deprecated
            and will be removed in a future NDK release. Avoid referencing
            it directly in your build scritps!

    OTHER FIXES AND CHANGES:

    - Reduced the size of generated binaries by using --strip-unneeded
      instead of --strip-debug. This gets rid of mor symbol table entries
      in release shared libraries and executables, without impacting
      runtime execution.

    - Fix bad automatic dependency tracking when using multiple source
      sub-directories.

    - The path to system headers is now included last in the compilation command
      line. This prevents conflicts with source code that define their own headers
      with similar names (e.g. a custom "err.h" was ignored, because the system
      <err.h> was used instead).

    - Update documentation for 'my-dir' function to explain that, due to the
      way GNU Make works, it really returns the path of the last included
      Makefile (instead of the current one). Also provide examples on how
      to deal with it.

    - make-release.sh: Now has an --out-dir=<path> option to specify the
      output directory where the packages are going to be copied. Also
      ensure that generated packages have go+r permissions.

    - ndk-build will now properly escape arguments. This means that something
      like this:

         ndk-build  MY_CFLAGS="-DFOO -DBAR"

      will now work correctly.

    - Add --git-http option to download-toolchain-sources.sh and
      rebuild-all-prebuilt.sh in order to download sources from
      android.git.kernel.org through HTTP.

    - ndk-gdb: properly launch activities for which name does not contain any dot.

    - ndk-gdb: add --delay=<timeout> option to specify a delay in seconds
      between activity launch and gdbserver attach. This is needed because certain
      activities can take a long time to properly launch. The default delay is
      also increased to 2 seconds (instead of 1).

    - build/tools/build-gcc.sh: copy the sysroot to the build directory. This
      avoids the generated toolchain binaries from hard-coding host build paths.

    - Platform files are now under $NDK/platforms instead of $NDK/build/platforms

    - Toolchain files are now under $NDK/toolchains instead of
      $NDK/build/toolchains and $NDK/build/prebuilt.

    - Release and debug objects are stored under two different directories now
      (i.e. obj/local/<abi>/objs and obj/local/<abi>/objs-debug). This
      prevents rebuilding *everything* when you switch between these two modes,
      which can be a real time-saver for complex projects.

    - Fixed a bug that duplicated the LOCAL_LDFLAGS in the final link command
      when LOCAL_ALLOW_UNDEFINED_SYMBOLS was not set to 'true'

    -------------------------------------------------------------------------------
    android-ndk-r4b

    This release fixes a few bugs in r4 scripts. There are no new features.

    OTHER FIXES & CHANGES:

    - build/tools/rebuild-all-prebuilt.sh: mktemp expects 'XXXXXX' instead of 'XXX'.
      Fix the script (and others in the same directory) to do that properly.

    - ndk-gdb: check the target device's API level, and dump an error message if
      it is not at least 8 (Android 2.2 a.k.a. Froyo). Fix script to properly
      remove control characters like '\r' from adb shell's output. Also fix
      script to work properly with OS X's BSD awk.

    - ndk-build: Make AndroidManifest.xml optional. Now the build scripts will try
      to look for jni/Android.mk if no manifest is found. If you don't use this,
      you can also define NDK_PROJECT_PATH to point to your tree.

      Also, on Windows, check that a Cygwin-compatible make executable is being
      used, and dump a readable help message to solve the issue if this is not
      the case.

    - Place generated binaries under $PROJECT_PATH/obj/ instead of
      $PROJECT_PATH/bin/ndk/. The 'bin' directory is sometimes cleaned
      by the JDT, resulting in the inability to properly load symbol versions
      of the shared libraries when running ndk-gdb.

    - Warn when sources with unsupported extensions are used in LOCAL_SRC_FILES.
      Previous behaviour was to silently ignore them.

    - Set the optimization mode to 'debug' automatically if the manifest sets
      android:debuggable to 'true'. You can override this by using
      'APP_OPTIM := release' in your Application.mk, or by adding '-O2' to
      your LOCAL_CFLAGS.

      Note that even in release mode, the NDK build scripts will produce
      binaries with symbols under obj/local/<abi>/ that will be used for
      debugging with gdb. However, the debugger will have a harder time to
      print proper local variable values that have been optimized out or
      even set breakpoints properly.

    -------------------------------------------------------------------------------
    android-ndk-r4

    IMPORTANT BUG FIXES:

    - The <fenv.h> header was not placed in the correct location and could not
      be found by normal builds.

    IMPORTANT CHANGES:

    - On Windows, Cygwin 1.7 or higher is now required. The NDK will not
      work properly with Cygwin 1.5 which is now officially obsolete
      anyway.

    - Simplified build system: You no longer need to run build/host-setup.sh
      or modify anything under $NDK_ROOT/apps/. Instead, just invoke the
      new 'ndk-build' script from your application's project directory, or
      one of its sub-directories.

      See docs/OVERVIEW.html and docs/NDK-BUILD.html for more details.

      NOTE: For compatibility purpose, you can still define projects
            through $NDK_ROOT/apps/<name> though.

            However, not that sample applications have moved from
            'apps/<name>/project' to 'samples/<name>' and now must
            be built with 'ndk-build'. The source code of pre-existing
            samples didn't change though.

    - Easy native debugging support when running debuggable applications
      on Android 2.2 or higher, through the new 'ndk-gdb' helper script.
      See docs/NDK-GDB.html for details.

    - Support for hardware FPU. This is through the new 'armeabi-v7a' ABI
      corresponding to ARMv7-a class devices.

      Note that by default, the NDK will still generate machine code for the old
      'armeabi' ABI (ARMv5TE based) which is supported by all official Android
      system images to date.

      You will need to define APP_ABI in your Application.mk file to change this.
      See docs/APPLICATION-MK.html

      More details about ABIs is now available in docs/CPU-ARCH-ABIS.html

    - A small static library named 'cpufeatures' is provided with source code
      and can be used at runtime to determine the CPU features supported by the
      target device. It should run on all Android platforms, starting from 1.5.

      For more information, see docs/CPU-FEATURES.html

    - Support for the optional ARM Advanced SIMD (a.k.a. NEON) instruction set
      extension through the use the LOCAL_ARM_NEON variable in Android.mk, or
      the '.neon' suffix when listing source files.

      Neon is an *optional* instruction set extension, and not all Android ARMv7
      devices will support it. You will need to use the 'cpufeatures' library to
      determine if such code can be used at runtime, and provide alternate code
      paths if this is not the case. This is similar to MMX/SSE/3DNow on x86
      platforms.

      For more information, see docs/CPU-ARM-NEON.html

    - Added a new sample (hello-neon) to demonstrate usage of 'cpufeatures'
      and NEON intrinsics and build support.

    - Added <android/bitmap.h>, a new stable API available from android-8
      (a.k.a. Android 2.2) to reliably access the pixel buffer of an
      android.graphics.Bitmap object from native code. See docs/STABLE-API.html
      and the new sample program under 'samples/bitmap-plasma' for details
      and usage example.

    - Support the NX (No Execute) security feature, where special sections
      are added to the generated shared libraries to instruct the kernel
      that code shall not be executed from the heap and stack by default.

      See docs/ANDROID-MK.html to see how to disable this, plus reference
      links for more information.

    OTHER FIXES AND CHANGES:

    - support the .s extension for raw assembly sources (.S is already supported
      but the input files are parsed by the C-preprocessor before being sent to
      the assembler).

    - build/host-setup.sh has been removed. There is no need for a 'setup' step
      when using the NDK for the first time. All host-specific autodetection and
      basic tool sanity checking have been moved to the build scripts themselves.

    - APP_MODULES in Application.mk is now optional. If not defined, the NDK
      will simply build _all_ the modules that are declared from your Android.mk.

      You can still use APP_MODULES to restrict the set of modules you want to
      build. Note that the NDK now computes the transitive dependencies of these
      modules for you now. See docs/APPLICATION-MK.html for details.

    - docs/STABLE-APIS.html: Add missing section for Dynamic Linker Library
      (libdl.so). It is actually supported by all API levels.

    - build/tools/download-toolchain-sources.sh: Use 'master' branch by default
      instead of the 'eclair' one.

    - build-toolchain.sh: Allow ad-hoc patching of toolchain sources when rebuilding
      them. This is primarily to ease development. All you need to do is put a patch
      under build/tools/toolchain-patches/<foo>/<name>.patch, and it will be applied
      with 'patch -p1' into the <foo> directory of the unpacked toolchain sources
      before the configure step.

    - docs/CPU-ARCH-ABIS.html: Mention the experimental 'x86' ABI.

    - build/core/mkdeps.sh: Removed obsolete script.

    - the NDK build script now only parses the Application.mk and Android.mk of
      the applications listed by APP. The error messages when APP is empty or
      malformed have also been improved.

    - removed the annoying 'the mangling of 'va_list' has changed in GCC 4.4'
      warning when building with GCC 4.4.0 for ARM.

    - C Library header fixes:

        For all platforms:

            - <arpa/inet.h>: no longer includes <netinet/in6.h>.
            - <ctype.h>: better inlining with -ansi option.
            - <mntent.h>: add missing include for <stdio.h>.
            - <netinet/in.h>: include <netinet/in6.h> and define in6addr_any +
              in6addr_loopback.
            - <netinet/in6.h>: add IPV6_JOIN_GROUP, IPV6_LEAVE_GROUP,
              IN6ADDR_ANY_INIT, ipv6mr_interface.
            - <sys/epoll.h>: add missing C++ inclusion guards.
            - <sys/resource.h>: add missing rlim_t declaration.
            - <sys/system_properties.h>: add missing C++ inclusion guards.
            - <time64.h>: add missing C++ inclusion guards.
            - <netdb.h>: move h_errno declaration inside C++ inclusion guards.

    - C Library changes:

        For android-8 (a.k.a. Android 2.2):

            - <dlfcn.h>: add DL_info and dladdr().
            - <err.h>: add err(), warn() and other variants.
            - <regex.h>, <fts.h>, <sys/queue.h>: added
            - <pthread.h>: add pthread_condattr_t
            - <sched.h>: added proper clone() declaration (and implementation).
            - <signal.h>: added killpg().
            - <stdio.h>: add fdprintf() and vfdprintf().
            - <stdlib.h>: fix ptsname_r() signature in declaration. previous
              implementation was broken anyway.
            - <unistd.h>: add getusershell(), setusershell(), endusershell(),
              ttyname(), ttyname_r(), TEMP_FAILURE_RETRY. Fix usleep() signature
              (now returns int).
            - <wchar.h>: add fake mbstowcs() and wcstombs().

      More details available under docs/system/libc/CHANGES.html

    -------------------------------------------------------------------------------
    android-ndk-r3

    IMPORTANT BUG FIXES:

    - Fix build/host-setup.sh to execute as a Bourne shell script (again)

    - Make target shared libraries portable to systems that don't use the exact
      same toolchain. This is needed due to differences in libgcc.a implementations
      between gcc 4.2.1 and 4.4.0. This change ensures that generated machine
      code doesn't depend on helper functions provided by the Android platform
      runtime.

    IMPORTANT CHANGES:

    - GCC 4.4.0 is now used by default by the NDK. It generates better code than
      GCC 4.2.1, which was used in previous releases. However, the compiler's C++
      frontend is also a lot more pedantic regarding certain template constructs
      and will even refuse to build some of them.

      For this reason, the NDK also comes with GCC 4.2.1 prebuilt binaries, and
      you can force its usage by defining NDK_TOOLCHAIN in your environment to
      the value 'arm-eabi-4.2.1'. For example:

            export NDK_TOOLCHAIN=arm-eabi-4.2.1
            make APP=hello-jni

      Note that only the 'armeabi' ABI is supported by the 4.2.1 toolchain. We
      recommend switching to 4.2.1 *only* if you encounter compilation problems
      with 4.4.0.

      The 4.2.1 prebuilt binaries will probably be removed from a future release
      of the Android NDK, we thus *strongly* invite you to fix your code if such
      problems happen.

    - Support for OpenGL ES 2.0. This is through the new 'android-5' platform to
      reflect Android 2.0 (previously the Eclair branch). This is merely a copy
      of android-4 that also includes headers and libraries for OpenGL ES 2.0.

      See the sample named "hello-gl2" for a *very* basic demonstration. Note that
      OpenGL ES 2.0 is currently *not* available from Java, and must be used
      through native code exclusively.

      IMPORTANT: OpenGL ES 2.0 is not supported in the Android emulator at this
                 time. Running/testing any native code that depends on it thus
                 requires a real device.

    - The NDK build script will now remove installed binaries from the application
      project's path before starting the build. This ensures that:

      - if the build fails for some reason, a stale/obsolete file is not left in
        your application project tree by mistake.

      - if you change the target ABI, a stale/obsolete file is not left into the
        folder corresponding to the old ABI.

    - Updated the STABLE-APIS.html document to clarify the OpenGL ES 1.0/1.1/2.0
      issues regarding specific devices (i.e. 1.0 supported everywhere, 1.1 and
      2.0 on specific devices only, need for <uses-feature> tag in manifest).

    OTHER FIXES AND CHANGES:

    - Actually use the awk version detected by host-setup.sh during the build.

    - Only allow undefined symbols when LOCAL_ALLOW_UNDEFINED_SYMBOLS is set
      to 'true', just like the documentation says it works. Also fix a typo
      in CLEAR_VARS that prevented this variable from being cleared properly.

    - Simplified build/tools/make-release.sh, the --prebuilt-dir option is
      gone, and --help will dump a clearer description of expected options
      and input files.

    - Added --prebuilt-ndk=FILE option to build/tools/make-release.sh script to
      package a new experimental NDK package archive from the current source tree
      plus the toolchain binaries of an existing NDK release package. E.g.:

        build/tools/make-release.sh \
           --prebuilt-ndk=/path/to/android-ndk-1.6_r1-linux-x86.zip

      will generate a new NDK package in /tmp/ndk-release that contains the most
      up-to-date build scripts, plus the toolchain binaries from 1.6_r1 (which
      are not in the git repository).

      Also added the --no-git option to collect all sources from the current
      NDK root directory, instead of the list given by 'git ls-files'. This can
      be useful if you don't want to checkout the whole 'platform/development'
      project from repo and still work on the NDK.

      This change is to help people easily package experimental NDK releases to
      test and distribute fixes and improvements.

    - Remove bash-isms from build/tools/build-toolchain.sh. Now it's possible to
      build it with the 'dash' shell on Debian-based systems (tested on Ubuntu 8.04)

    - Remove bash-ism from build/tools/build-ndk-sysroot.sh

    - Refresh C library headers for all platforms:

        - make <endian.h> simply include <sys/endian.h>
        - make <stdint.h> properly declare 64-bit integer types with a C99 compiler
        - add missing <sys/types.h> to <strings.h>
        - add GLibc-compatible macro aliases (st_atimensec, st_mtimensec and
          st_ctimensec) to <stat.h>
        - add missing declaration for tzset() in <time.h>

    - Added build/tools/download-toolchain-sources.sh, a script that allows you
      to download the toolchain sources from the official open-source repository
      at android.git.kernel.org and nicely package them into a tarball that can
      later be used by build/tools/build-toolchain.sh to rebuild the prebuilt
      binaries for your system.

    - Updated build/tools/build-toolchain.sh to support the tarballs generated
      by download-toolchain-sources.sh with the --package=<file> option. This
      also builds both gcc 4.2.1 and 4.4.0, adding support for armeabi-v7a to
      gcc 4.4.0.

    -------------------------------------------------------------------------------
    android-ndk-1.6_r1

    IMPORTANT BUG FIXES:

    - Fix build/host-setup.sh to:
      * execute as a Bourne shell script
      * remove unused host gcc dependency
      * improve Windows host auto-detection
      * add GNU Make version check
      * add Nawk/Gawk check
      * ensure that the script is run from $NDKROOT as build/host-setup.sh
      * add --help, --verbose, --no-awk-check and --no-make-check options

    - Properly add sysroot library search path at build time. This makes a line
      in Android.mk like:

         LOCAL_LDLIBS := -lz

      Actually work correctly, instead of having the linker complaining that it
      could not find the corresponding libz.so library. Also clear LOCAL_LDLIBS
      in $(CLEAR_VARS) script.

    IMPORTANT CHANGES:

    - The 'sources' directory is gone. The NDK build system now looks for
      $(APP_PROJECT_PATH)/jni/Android.mk by default. You can override this with
      the new APP_BUILD_SCRIPT variable in Application.mk

      For example, the 'hello-jni' sample uses the following files:

        apps/hello-jni/project/jni/Android.mk
        apps/hello-jni/project/jni/hello-jni.c

      The 'apps/<name>' directory is still needed in this release though.

    - Change LOCAL_CFLAGS / LOCAL_CPPFLAGS to work as in the full Android build
      system. This means that:

        - LOCAL_CFLAGS   is now used for *both* C and C++ sources  (was only for C)
        - LOCAL_CPPFLAGS is now used for C++ sources only (was for both C and C++)
        - LOCAL_CXXFLAGS is used like LOCAL_CPPFLAGS but is considered obsolete.
          (will disappear in next release)

      Also fixed APP_CPPFLAGS / APP_CFLAGS / APP_CXXFLAGS correspondingly.

    - Rename build/platforms/android-1.5 to build/platforms/android-3 to match
      the Android API level instead of the marketing speak.

      Also add a new build/platforms/android-4, and make the build system select
      which platform to use based on the content of the project file named
      $(APP_PROJECT_PATH)/default.properties.

    - Add OpenGL ES 1.x headers and libraries to the android-4 stable APIs.
      (NOTE: they are *not* available for android-3)

      Also provide a small port of the "San Angeles Observation" demo to show
      how to make a simple Android application that uses them.

    OTHER FIXES AND CHANGES

    - Ensure that the __ANDROID__ macro is always defined when building code
      with the NDK. Normally, the macro must be defined by the toolchain
      automatically to indicate that you're targeting the Android runtime.

      This works for the new arm-linux-androideabi toolchain, but there is
      a bug in the way we built the arm-eabi one, so add the flag manually
      through the NDK build script for it.

      Note that the ANDROID macro, is now deprecated. While it is still defined
      by the NDK, you should modify your code to test against __ANDROID__ instead!

    - Generate thumb binaries by default.

    - Add support for LOCAL_ARM_MODE in Android.mk.

    - Add support for the '.arm' suffix in source file names to force the
      compilation of a single source in ARM (32-bit) mode.

    - Generate proper unoptimized versions of binaries when APP_OPTIM := debug

    - Add support for LOCAL_C_INCLUDES in Android.mk

    - Fix compilation of assembler files (e.g. foo.S)

    -------------------------------------------------------------------------------
    android-ndk-1.5_r1 released.