IMPORTANT NOTE

The AVS Device SDK supports wake word detectors from Sensory and KITT.ai, but not support platform of A113D.
In this project, used CMU Sphinx to achieved.

CROSS COMPILE

This is my cmake command using the toolchain.cmake toolchain file:

$ cmake -DCMAKE_TOOLCHAIN_FILE=~/toolchain.cmake ~/sdk-folder/sdk-source/avs-device-sdk/ 
        -DSENSORY_KEY_WORD_DETECTOR=OFF -DGSTREAMER_MEDIA_PLAYER=ON 
        -DCMAKE_PREFIX_PATH=~/A113D_20170831_alexa/output/mesonaxg_s400_32_release/ -DPORTAUDIO=ON 
        -DPORTAUDIO_LIB_PATH=~/sdk-folder/third-party/portaudio/lib/.libs/libportaudio.a 
        -DPORTAUDIO_INCLUDE_DIR=~/sdk-folder/third-party/portaudio/include/ 
        -DCMAKE_PREFIX_PATH=~/A113D_20170831_alexa/output/mesonaxg_s400_32_release/ 
        -DCMAKE_INSTALL_PREFIX=~/A113D_20170831_alexa/output/mesonaxg_s400_32_release/ 
        -DCMAKE_BUILD_TYPE=DEBUG -Wno-dev 

The toolchain.cmake toolchain file for ARM:

set(CMAKE_SYSTEM_NAME Linux)
set(TOOLCHAIN_PREFIX $ENV{TOOLCHAIN_PATH}/bin/arm-linux-gnueabihf-)

INCLUDE(CMakeForceCompiler)
set(CMAKE_C_COMPILER ${TOOLCHAIN_PREFIX}gcc)
set(CMAKE_CXX_COMPILER ${TOOLCHAIN_PREFIX}g++)

set(CMAKE_SYSROOT $ENV{TOOLCHAIN_PATH}/arm-linux-gnueabihf/sysroot)

set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)

set(COMPILER_FLAGS " -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${COMPILER_FLAGS}" CACHE STRING "" FORCE)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${COMPILER_FLAGS}" CACHE STRING "" FORCE)

Environments variables which I exports below:

export TOOLCHAIN_PATH=~/A113D_20170831_alexa/output/mesonaxg_s400_32_release/host/usr
export PKG_CONFIG_DIR=""
export PKG_CONFIG_LIBDIR="${TOOLCHAIN_PATH}/lib/pkgconfig:${TOOLCHAIN_PATH}/arm-linux-gnueabihf/sysroot/usr/lib/pkgconfig"
export PKG_CONFIG_PATH="${TOOLCHAIN_PATH}/lib/pkgconfig:${TOOLCHAIN_PATH}/arm-linux-gnueabihf/sysroot/usr/lib/pkgconfig"
export PKG_CONFIG_SYSROOT_DIR="${TOOLCHAIN_PATH}/arm-linux-gnueabihf/sysroot"

CITE SOURCES

AVS Device SDK
CMU Sphinx