am 010c2ee: Merge change 1307 into donut
Merge commit '010c2ee6b8961cc5c95c7710ea5a3058ff6ca77d' * commit '010c2ee6b8961cc5c95c7710ea5a3058ff6ca77d': Remove the ROADMAP NDK file as it shouldn't be packaged with the NDK
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Android NDK Roadmap
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This is the list of improvements planned for the NDK, in no
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specific order of preference or priority:
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Fix bugs and make things easier in general.
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Business as usual...
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Support x86 target ABI
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Requires building a corresponding toolchain tree for
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various supported host platforms, and modify the build
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system. Biggest challenge at the moment is finding a
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stable x86 platform to run tests against.
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Support for ARMv5TE + FPU
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Unfortunately, a real FPU mandates that specific floating-point
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registers be used to passed floating-point values in function
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call. This results in a new ABI that is not compatible with the
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one we currently support.
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This new ABI should have a different name (e.g. 'armfpu') and
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be supported through a different sysroot + toolchain configuration
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(though it is likely we could reuse the arm-eabi-4.2.1 prebuilt
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binaries, but with different configuration options).
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Easier debugging support
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Debugging native code is still very rough. We can make it a lot better
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through a series of tricks, which involve modifying some parts of the
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system.
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Stable native APIs for OpenGL ES.
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Nuff said...
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Stable C-based native API for a simple way to access surface pixels
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Probably based on a simple lock/unlock paradigm. Would ideally be
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useful to access both Skia and GL surfaces at the same time, though
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probably with very different performance characteristics.
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It will probably be very limited in scope, intentionally.
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Stable native APIs for audio.
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Only something simple that could be used to manage audio buffers in
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native code in a real-time basis. For now, applications have to
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pass the buffers from Java to perform signal processing in native code
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for them.
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Stable native APIs from 'libcutils/libutils'
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The system libraries 'libcutils' and 'libutils' provide a host of
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useful Android-specific functions that we could certainly expose to
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native application.
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Not everything in these libraries can be considered stable, so we
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should probably split their headers into 'stable' and 'unstable'
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parts, and add them to the NDK's sysroot over time.
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C++ Standard Library support
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Many people are interested in using the STL. The Android system images
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simply do *not* provide any real libstdc++ due to space/performance
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constraints. However, we should be able to provide one or more STL
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implementations as static libraries that can be linked to developer's
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binaries.
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Note that locales and wchar_t are not supported by the Android C library
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so these would probably not be supported anyway.
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Better C++ exceptions and RTTI support
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Some of these can be used in limited ways with the NDK, but it's a
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pretty hard road that is not recommended at the moment. We should be
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able to make this easier in the future.
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