Android NDK, r4b がリリースされました（2010年7月15日）。
http://developer.android.com/sdk/ndk/index.html
CHANGED.TXT によると、
This release fixes a few bugs in r4 scripts. There are no new features.
ということで、
このリリースは、Android NDK, r4 のバクフィックスが目的であり、新しい機能追加は無いようですが、
Android NDK, r4 をお使いの方は、更新された方が良さそうです。
以下、CHANGED.TXT の引用です。
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.
