prepare_mkldnn.sh

#!/bin/bash

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MXNET_ROOTDIR="$(pwd)"
MKLDNN_ROOTDIR="$MXNET_ROOTDIR/3rdparty/mkldnn/"
MKLDNN_SRCDIR="$MKLDNN_ROOTDIR/src"
MKLDNN_BUILDDIR="$MKLDNN_ROOTDIR/build"
MKLDNN_INSTALLDIR="$MKLDNN_ROOTDIR/install"
MKLDNN_LIBDIR="$MXNET_ROOTDIR/lib"

# MKLDNN install destination
HOME_MKLDNN=$1
if [ ! -z "$HOME_MKLDNN" ]; then
  mkdir -p $HOME_MKLDNN
  if [ ! -w $HOME_MKLDNN ]; then
    echo "MKLDNN install to $HOME_MKLDNN failed, please try with sudo" >&2
    exit 1
  fi
fi

if [ $OSTYPE == "darwin16" ]; then
  MKLDNN_LIBFILE="$MKLDNN_INSTALLDIR/lib/libmkldnn.dylib"
else
  MKLDNN_LIBFILE="$MKLDNN_INSTALLDIR/lib/libmkldnn.so"
fi

if [ -z $MKLDNNROOT ]; then
if [ ! -f $MKLDNN_LIBFILE ]; then
    mkdir -p $MKLDNN_INSTALLDIR
	cd $MKLDNN_ROOTDIR
    if [ -z $MKLROOT ] && [ ! -f $MKLDNN_INSTALLDIR/include/mkl_cblas.h ]; then
        rm -rf external && cd scripts && ./prepare_mkl.sh >&2 && cd ..
        cp -a external/*/* $MKLDNN_INSTALLDIR/.
    fi 
    echo "Building MKLDNN ..." >&2
    cd $MXNET_ROOTDIR
	g++ --version >&2
    cmake $MKLDNN_ROOTDIR -DCMAKE_INSTALL_PREFIX=$MKLDNN_INSTALLDIR -B$MKLDNN_BUILDDIR -DARCH_OPT_FLAGS="-mtune=generic" >&2
    NUM_PROC=1
    if [[ ! -z $(command -v nproc) ]]; then
      NUM_PROC=$(nproc)
    elif [[ ! -z $(command -v sysctl) ]]; then
      NUM_PROC=$(sysctl -n hw.ncpu)
    else
      >&2 echo "Can't discover number of cores."
    fi
    make -C $MKLDNN_BUILDDIR -j$(NUM_PROC) VERBOSE=1 >&2

    make -C $MKLDNN_BUILDDIR install >&2
    rm -rf $MKLDNN_BUILDDIR
    mkdir -p $MKLDNN_LIBDIR
    cp $MKLDNN_INSTALLDIR/lib/* $MKLDNN_LIBDIR
fi
MKLDNNROOT=$MKLDNN_INSTALLDIR
fi

if [ -z $MKLROOT ] && [ -f $MKLDNNROOT/include/mkl_cblas.h ]; then 
  MKLROOT=$MKLDNNROOT;
fi

# user specified MKLDNN install folder
if [ -d "$HOME_MKLDNN" ]; then
  # skip if user specificed MKLDNNROOT
  [ "$MKLDNNROOT" != "$HOME_MKLDNN" ] && rsync -a $MKLDNNROOT/include $MKLDNNROOT/lib $HOME_MKLDNN/.
  [ "$MKLROOT" != "$HOME_MKLDNN" ] && rsync -a $MKLROOT/include $MKLROOT/lib $HOME_MKLDNN/.
  # update ldconfig if possible
  if [ -w /etc/ld.so.conf.d ]; then
    echo "$HOME_MKLDNN/lib" > /etc/ld.so.conf.d/mxnmkldnn.conf && ldconfig
  fi
# return value to calling script (Makefile,cmake)
  echo $HOME_MKLDNN $HOME_MKLDNN
else
  echo $MKLDNNROOT $MKLROOT
fi