Using built-in specs.
COLLECT_GCC=bin/aarch64-linux-android-gcc
COLLECT_LTO_WRAPPER=/usr/local/google/home/xur/work/AOSP_CP/prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/../libexec/gcc/aarch64-linux-android/4.9.x-google/lto-wrapper
Target: aarch64-linux-android
Configured with: /tmp/AOSP-toolchain/build/../gcc/gcc-4.9/configure --prefix=/tmp/ndk-xur/build/toolchain/prefix --target=aarch64-linux-android --host=x86_64-linux-gnu --build=x86_64-linux-gnu --with-gnu-as --with-gnu-ld --enable-languages=c,c++ --with-gmp=/tmp/ndk-xur/build/toolchain/temp-install --with-mpfr=/tmp/ndk-xur/build/toolchain/temp-install --with-mpc=/tmp/ndk-xur/build/toolchain/temp-install --with-cloog=/tmp/ndk-xur/build/toolchain/temp-install --with-isl=/tmp/ndk-xur/build/toolchain/temp-install --with-ppl=/tmp/ndk-xur/build/toolchain/temp-install --disable-ppl-version-check --disable-cloog-version-check --disable-isl-version-check --enable-cloog-backend=isl --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --disable-libssp --enable-threads --disable-nls --disable-libmudflap --disable-libgomp --disable-libstdc__-v3 --disable-sjlj-exceptions --disable-shared --disable-tls --disable-libitm --enable-initfini-array --disable-nls --prefix=/tmp/ndk-xur/build/toolchain/prefix --with-sysroot=/tmp/ndk-xur/build/toolchain/prefix/sysroot --with-binutils-version=2.24 --with-mpfr-version=3.1.1 --with-mpc-version=1.0.1 --with-gmp-version=5.0.5 --with-gcc-version=4.9 --with-gdb-version=7.7 --with-gxx-include-dir=/tmp/ndk-xur/build/toolchain/prefix/include/c++/4.9 --with-bugurl=http://source.android.com/source/report-bugs.html --disable-bootstrap --disable-libquadmath --enable-plugins --enable-libgomp --disable-libsanitizer --enable-gold --enable-graphite=yes --with-cloog-version=0.18.0 --with-isl-version=0.11.1 --enable-eh-frame-hdr-for-static --enable-fix-cortex-a53-835769 --disable-gold --program-transform-name='s&^&aarch64-linux-android-&'
Thread model: posix
gcc version 4.9.x-google 20140827 (prerelease) (GCC) 

gcc:
commit ba21122c63b06a70b620c8990c517b87198ad05b
Author: Rong Xu <xur@google.com>

    [4.9] Restore recog state after finding pre-madd instruction.
    This patch backports svn r216853 from upsteam gcc-4.9 branch that
    fixed a bug introduced in fixing cortex a53 erratum 835769.

binutils:
commit c8e1636493f7d40bb0ba37501e9a6f67cd062a31
Author: Rong Xu <xur@google.com>

    [2.24] Cortex-A53 erratum 835769 linker workaround

gdb:
commit 4d4fc852868e03aa125d19ec0ad7e7fbc157c81c
Merge: 500f3b2 668248d
Author: Andrew Hsieh <andrewhsieh@google.com>

    Merge "Add MIPS R6 support."

gmp:
commit e6b9669dafc6a5f83c80b4b4176359b78bccdc90
Author: David 'Digit' Turner <digit@google.com>

    Add gmp-5.0.5.tar.bz2

mpfr:
commit bfcf1bfa38469208aaad8873cd4c68781061d90f
Author: Andrew Hsieh <andrewhsieh@google.com>

    add mpfr-3.1.1.tar.bz2

build:
commit 75542e77b565c2af968e48c1b12b32f343d913ae
Author: Andrew Hsieh <andrewhsieh@google.com>

    Fix binutils-2.24 detection

expat:
commit 40172a0ae9d40a068f1e1a48ffcf6a1ccf765ed5
Author: Jing Yu <jingyu@google.com>

    expat package for building gdb-7.3