在Mac OS X 10.9 上使用 NDK r9c 编译 FFTW 3.3.3
1.下载FFTW源代码
2.建立一个Android 工程，并且添加 NDK 支持
3.解压缩FFTW的源代码到刚刚建立的Android 目录下面 文件夹名字为 fftw-3.3.3
4.建立编译脚本 build.sh 并在命令行下执行
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#!/bin/sh # build.sh # Compiles fftw3 for Android # Make sure you have NDK_ROOT defined in .bashrc or .bash_profile INSTALL_DIR="`pwd`/jni/fftw3" SRC_DIR="`pwd`/fftw-3.3.3" cd $SRC_DIR export PATH="$NDK_ROOT/toolchains/arm-linux-androideabi-4.8/prebuilt/darwin-x86_64/bin/:$PATH" export SYS_ROOT="$NDK_ROOT/platforms/android-8/arch-arm/" export CC="arm-linux-androideabi-gcc --sysroot=$SYS_ROOT" export LD="arm-linux-androideabi-ld" export AR="arm-linux-androideabi-ar" export RANLIB="arm-linux-androideabi-ranlib" export STRIP="arm-linux-androideabi-strip" mkdir -p $INSTALL_DIR ./configure --host=arm-eabi --prefix=$INSTALL_DIR LIBS="-lc -lgcc" --enable-float make make install exit 0 |
INSTALL_DIR tells make to install the compiled library in our project's jni directoryPATH tells make to look for our tool chain in the NDK directory. Note that you might have to change this value - explore your NDK directory to make sure that the path existsSYS_ROOT tells make where to look for system libraries and header files./configure --host=arm-eabi tells make that we are cross-compiling a ARM architecture.
5.修改Android.mk 文件
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# jni/Android.mk LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := fftw3 LOCAL_SRC_FILES := fftw3/lib/libfftw3.a LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/fftw3/include include $(PREBUILT_STATIC_LIBRARY) |