使用NDK编译CMU Sphinx

Sphinx使用的Autotool（但是版本很旧），所以使用NDK编译需要配置环境：

#! /bin/bash

LD_LIBRARY_PATH+=" /home/gqw/workspace/sphinx/sphinxbase/lib/ ":
export LD_LIBRARY_PATH

export ANDROID_HOME=/home/gqw/workspace/android
export NDK_HOME=$ANDROID_HOME/ndk
export NDK_TC_HOME=$NDK_HOME/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86
export NDK_TC_BIN_DIR=$NDK_TC_HOME/bin
export NDK_TC_BIN_PREFIX=arm-linux-androideabi

export CC=" $NDK_TC_BIN_DIR/$NDK_TC_BIN_PREFIX-gcc -nostdlib  "
export CXX=" $NDK_TC_BIN_DIR/$NDK_TC_BIN_PREFIX-g++  "
export LD=$NDK_TC_BIN_DIR/$NDK_TC_BIN_PREFIX-ld
export AR=$NDK_TC_BIN_DIR/$NDK_TC_BIN_PREFIX-ar
export STRIP=$NDK_TC_BIN_DIR/$NDK_TC_BIN_PREFIX-strip

# STL
NDK_STL_HEADER_FLAG+=" -I$NDK_HOME/sources/cxx-stl/gnu-libstdc++/include "
NDK_STL_HEADER_FLAG+=" -I$NDK_HOME/sources/cxx-stl/gnu-libstdc++/include "
NDK_STL_HEADER_FLAG+=" -I$NDK_HOME/sources/cxx-stl/gnu-libstdc++/libs/armeabi/include "
export NDK_STL_HEADER_FLAG

NDK_HEADER_FLAG+=$NDK_STL_HEADER_FLAG
NDK_HEADER_FLAG+=" -I$NDK_HOME/platforms/android-9/arch-arm/usr/include "
NDK_HEADER_FLAG+=" -Ijni "
export NDK_HEADER_FLAG

NDK_LIB_FLAG+=" -L$NDK_HOME/platforms/android-9/arch-arm/usr/lib "
export NDK_LIB_FLAG

CPPFLAGS+=$NDK_HEADER_FLAG
#CPPFLAGS+=" -funwind-tables -fstack-protector " //can't appare two
# CPPFLAGS+="  -frtti " //only for c++
CPPFLAGS+=" -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -DANDROID -DNDEBUG "
CPPFLAGS+=" -O0 -g3 -fexceptions -MMD -MP -MF "
CPPFLAGS+=" -Wno-psabi -march=armv5te -mtune=xscale -msoft-float"
CPPFLAGS+=" -mthumb -Os -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 "
CPPFLAGS+=" -Wa,--noexecstack  -fpic -ffunction-sections  "
export CPPFLAGS

LDFLAGS+=$NDK_LIB_FLAG
# LDFLAGS+=" -nostdlib " //need for gcc ,not g++
LDFLAGS+=" --sysroot=$NDK_HOME/platforms/android-9/arch-arm  "
LDFLAGS+=" -Wl,--gc-sections -Wl,-z,nocopyreloc -Wl,-dynamic-linker,/system/bin/linker "
LDFLAGS+=" -Wl,--no-undefined -Wl,-z,noexecstack -lc -lm -lstdc++ -lOpenSLES "
export LDFLAGS

#LIBS+=" $NDK_HOME/sources/cxx-stl/gnu-libstdc++/libs/armeabi/libsupc++.a "
LIBS+=" $NDK_HOME/sources/cxx-stl/gnu-libstdc++/libs/armeabi-v7a/libgnustl_static.a "
LIBS+=" $NDK_TC_HOME/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a "
export LIBS

../configure --host=arm-linux --prefix=$(pwd)/../../sphinxbase

如果作修改，或在修改中不使用STL则执行完脚本直接make就可以了。

如果想在修改中使用STL则需做额外的工作：

将使用STL的文件后缀名由.c改为.cpp（注意修改 相应Makefile.am中的信息）， 根目录执行autoreconf -i，根据提示修改configure.in文件。

再次执行即可。