arm compile error with ndk android-toolchain

[bryanlinnan]

Description

compile error occured when i tried to use android-toolchain to compile mxnet/amalgamation

Environment info (Required)

ubuntu16.04 mxnet1.4 android-ndk-r14b/13b/16b

What to do:

1. generate android-toolchain
   cd /android-ndk-r14b/build/tools
   ./make-standalone-toolchain.sh --platform=android-21 --use-llvm --arch=arm --install-dir=/Tool/android-toolchain

2. compile OpenBLAS
   git clone https://github.com/xianyi/OpenBLAS.git
   export PATH=$PATH:/Tool/android-toolchain/bin
   cd OpenBLAS
   make TARGET=ARMV7 HOSTCC=gcc CC=arm-linux-androideabi-gcc NOFORTRAN=1
   make PREFIX=/Tool/openblas install

3. build mxnet
   git clone --recursive https://github.com/dmlc/mxnet.git
   cd mxnet/amalgamation
   export PATH=~/Tool/android-toolchain/bin:$PATH
   export CXX=arm-linux-androideabi-g++
   export CC=arm-linux-androideabi-gcc
   make ANDROID=1

MXNet commit hash:
(Paste the output of git rev-parse HEAD here.)
f2ca66f

Error Message:

1. fatal error: sys/fcntl.h: No such file or directory
   then i fix this error by modify the mxnet_predict-all.cc with fcntl instead of sys/fcntl
   then another error come:
2. fatal error: x86intrin.h: No such file or directory
   then i fix this error by removing it from mxnet_predict-all.cc
   then another error come:
3. error: 'stod' is not a member of 'std'
   error: 'to_string' is not a member of 'std'
   now i don't know how to fix it

[vdantu]

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