How do I compile an existing C program for Android using NDK?

Question

I am writing an Android app to test network performance, and I want to use iPerf in the app. I can find binary iPerf files already compiled for Android (and then I can run iPerf on the phone and collect its output) but I'm interested in compiling the files myself.

Here, someone presents scripts that can be used to compile the program: http://sourceforge.net/tracker/index.php?func=detail&aid=3533374&group_id=128336&atid=711373

I know that it requires the NDK but I don't know where to start. Are there any good resources or advice that can help guide me to compiling this on my own (on Windows, but I also have Cygwin). I know C and how to use GCC on linux, but I'm not sure where to start here.

Thanks for any help in advance!

Answer 1

啊，这个链接有我正在寻找的信息，对于其他任何人... 想要编译本机Android二进制文件我可以在手机终端上运行

Answer 2

Here is a good discussion of getting started with the NDK.

https://stackoverflow.com/questions/5375453/looking-for-a-good-tutorial-on-android-ndk

If you work through the tutorial you will build your own NDK "Hello, World" sort of app. It's simple but it will help you understand the NDK.

Here's a direct link to the tutorial: http://mobile.tutsplus.com/tutorials/android/ndk-tutorial/

Answer 3

Work on Iperf3

    #!/bin/sh
wget https://dl.google.com/android/repository/android-ndk-r18-linux-x86_64.zip
sudo apt-get install unzip
unzip android-ndk-r18-linux-x86_64.zip
#--arch arm or arm64 https://developer.android.com/ndk/guides/standalone_toolchain
android-ndk-r18/build/tools/make_standalone_toolchain.py --arch arm --api 26 --install-dir=my-toolchain
# Add the standalone toolchain to the search path.
export PATH=$PATH:`pwd`/my-toolchain/bin

# Tell configure what tools to use. aarch64-linux-android
target_host=arm-linux-androideabi #aarch64-linux-android or arm-linux-androideabi
export AR=$target_host-ar
export AS=$target_host-clang
export CC=$target_host-clang
export CXX=$target_host-clang++
export LD=$target_host-ld
export STRIP=$target_host-strip

# Tell configure what flags Android requires.
export CFLAGS="-fPIE -fPIC"
export LDFLAGS="-pie"
sudo apt-get install build-essential git
git clone https://github.com/esnet/iperf
cd iperf/
echo manual edit src/iperf_api.c change to char template[] = "/data/local/tmp/iperf3.XXXXXX";

#--disable-profiling or edit src/Makefile.in deleting "-pg" from iperf3_profile_CFLAGS and iperf3_profile_LDFLAGS
#./configure --host=arm-linux-androideabi CFLAGS=-static CXXFLAGS=-static --disable-profiling 
#make

##iperf2
#sudo apt-get install autotools-dev
#cp /usr/share/misc/config.{sub,guess} .

#adb push src/iperf3 /data/local/tmp
#adb shell chmod 755 /data/local/tmp/iperf3
#adb shell "/data/local/tmp/iperf3 -v"