tree bdc50a09c35f433b6d3bb53c4b2dadae3734ce76
parent 16751c0561d3aaa8c53497cd0175e461943e727f
author Andrew Hsieh <andrewhsieh@google.com> 1379829912 +0800
committer Andrew Hsieh <andrewhsieh@google.com> 1379829912 +0800

New x86 toolchain: x86_64-linux-android-4.8 (darwin-x86)

This toolchain can generates x86, x32, and x86_64 (default) code.
Android build system already adds "-m32" to HOST_GLOBAL_CFLAGS
and HOST_GLOBAL_LDFLAGS for projects to compiled in x86.

Build instructions:

export AOSP=your-AOSP-path
cd $AOSP/development/ndk/platforms/android-9
ln -s arch-x86 arch-x86_64

export NDK=$AOSP/ndk
cd $NDK ; ./build/tools/dev-cleanup.sh
./build/tools/download-toolchain-sources.sh /tmp/ndk-$USER/src
./build/tools/gen-platforms.sh --minimal --dst-dir=$NDK --ndk-dir=$NDK --arch=x86_64
./build/tools/build-gcc.sh /tmp/ndk-$USER/src $NDK x86_64-4.8 --try-64
rm -rf $NDK/toolchains/x86_64-4.8/prebuilt/darwin-x86_64/sysroot
cp -a $NDK/toolchains/x86_64-4.8/prebuilt/darwin-x86_64/* \
  $AOSP/prebuilts/gcc/darwin-x86_64/x86/x86_64-linux-android-4.8

Change-Id: Ibbbea26cc51e0f2cc3e7aeaabbfb8fdf4182e802