想要编译本机Android二进制文件我可以在手机终端上运行

I've been trying for a couple days to compile a native ARM Android binary that will execute on my phone using a terminal application. I want to generate the same type of binary as the standard Posix binaries installed on the phone like ls, mkdir etc. I've downloaded the Android NDK under Mac OS X and have been able to compile simple ELF binaries without errors. However, when I transfer them to the phone, they always segfault. That is, they segfault when compiled with -static in GCC. If I don't use -static, they complain about not being linked, etc. Put simply, they don't work.

我已经尝试了几天来编译一个本机ARM Android二进制文件，它将使用终端应用程序在我的手机上执行。我想生成与手机上安装的标准Posix二进制文件相同类型的二进制文件，如ls，mkdir等。我已经在Mac OS X下载了Android NDK，并且能够无错误地编译简单的ELF二进制文件。但是，当我将它们转移到手机时，它们总是会出现段错误。也就是说，在GCC中使用-static编译时会出现段错误。如果我不使用-static，他们会抱怨没有链接等等。简单地说，它们不起作用。

My hypothesis is that they are not linking to the Android standard C library properly. Even though I am linking my binaries with the libc provided by the NDK, they still don't work. I read that Android uses the Bionic C library, and tried to download source for it but I'm not sure how to build a library from it (it's all ARM assembly, it seems).

我的假设是它们没有正确链接到Android标准C库。即使我将我的二进制文件与NDK提供的libc链接，它们仍然无法正常工作。我读到Android使用Bionic C库，并试图为它下载源代码，但我不确定如何从它构建一个库（它似乎是所有ARM程序集）。

Is it true that the Android C library on the phone is different from the one provided with the Android NDK? Will the one included with the NDK not allow me to compile native binaries I can execute through a terminal? Any guidance here is greatly appreciated!

手机上的Android C库是否与Android NDK提供的库不同？包含在NDK中的那个不允许我编译我可以通过终端执行的本机二进制文件吗？非常感谢任何指导！

Update:

更新：

I finally got this to work using GCC 4.7.0 on Mac OS X. I downloaded the Bionic headers and then compiled a dynamically linked binary using the C library that comes with the Android NDK. I was able to get a test app to work on the phone using the phone's C lib (the binary was 33K). I also tried to statically link against the NDK's C library, and that also worked.

我终于在Mac OS X上使用GCC 4.7.0了解它。我下载了Bionic标头，然后使用Android NDK附带的C库编译了一个动态链接的二进制文件。我能够使用手机的C lib（二进制为33K）获得一个测试应用程序在手机上工作。我还尝试静态链接NDK的C库，这也有效。

In order to get this all working I had to pass -nostdlib to GCC and then manually add crtbegin_dynamic.o and crtend_android.o to GCC's command line. It works something like this:

为了使这一切工作，我必须将-nostdlib传递给GCC，然后手动将crtbegin_dynamic.o和crtend_android.o添加到GCC的命令行。它的工作原理如下：

$CC \
$NDK_PATH/usr/lib/crtbegin_dynamic.o \
hello.c -o hello \
$CFLAGS \
$NDK_PATH/usr/lib/crtend_android.o

For static binaries, use "crtbegin_static.o." This is explained in the crtbegin_dynamic.S/crtbegin_static.S source.

对于静态二进制文件，请使用“crtbegin_static.o”。这在crtbegin_dynamic.S / crtbegin_static.S源中进行了解释。

For this experiment, I only used plain 'ol GCC 4.7.0 and Binutils 2.22. I also compiled GCC with newlib, but I am not actually linking my ARM binaries with newlib at all. I am forcing GCC/ld to link directly to the libc provided with the Android NDK, or in the case of dynamic binaries, to the libc on the phone.

对于这个实验，我只使用普通的'ol GCC 4.7.0和Binutils 2.22。我还使用newlib编译了GCC，但我实际上并没有将我的ARM二进制文件与newlib链接起来。我强迫GCC / ld直接链接到随Android NDK提供的libc，或者在动态二进制文件的情况下，链接到手机上的libc。

4 个解决方案

#1

Just use the android-ndk. And build a Android.mk like so. include $(BUILD_EXECUTABLE) is what tells it build a executable instead of a JNI .lib

只需使用android-ndk。并像这样构建一个Android.mk。 include $（BUILD_EXECUTABLE）告诉它构建一个可执行文件而不是JNI .lib

Android.mk

ifneq ($(TARGET_SIMULATOR),true)

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)

LOCAL_CFLAGS += -Wall


LOCAL_LDLIBS := -L$(LOCAL_PATH)/lib -llog -g

LOCAL_C_INCLUDES := bionic
LOCAL_C_INCLUDES += $(LOCAL_PATH)/include

LOCAL_SRC_FILES:= main.cpp

LOCAL_MODULE := mycmd

include $(BUILD_EXECUTABLE)

endif  # TARGET_SIMULATOR != true

#2

First, make sure you have the NDK:

首先，确保你有NDK：

http://developer.android.com/tools/sdk/ndk/index.html

http://developer.android.com/tools/sdk/ndk/index.html

Here is the easiest way to compile a C binary for your phone:

这是为手机编译C二进制文件的最简单方法：

http://developer.android.com/tools/sdk/ndk/index.html

http://developer.android.com/tools/sdk/ndk/index.html

http://www.kandroid.org/ndk/docs/STANDALONE-TOOLCHAIN.html

http://www.kandroid.org/ndk/docs/STANDALONE-TOOLCHAIN.html

Usually $NDK(may be different) =

通常$ NDK（可能不同）=

Linux:

Linux的：

/home/<user>/android-ndk

/家庭/ <用户> /机器人-NDK

Mac OS X:

Mac OS X：

/Users/<user>/android-ndk

/用户/ <用户> /机器人-NDK

In Terminal:

在终端：

# create tool-chain - one line
# New method in ndk 12.
$NDK/build/tools/make_standalone_toolchain.py --arch arm --install-dir=/tmp/my-android-toolchain
# Old method.
#$NDK/build/tools/make-standalone-toolchain.sh --platform=android-3 --install-dir=/tmp/my-android-toolchain

# add to terminal PATH variable
export PATH=/tmp/my-android-toolchain/bin:$PATH

# make alias CC be the new gcc binary
export CC=arm-linux-androideabi-gcc

# compile your C code(I tried hello world)
$CC -o foo.o -c foo.c

# push binary to phone
adb push foo.o /data/local/tmp

# execute binary
adb /data/local/tmp/foo.o

#3

Using CMake with the Android NDK is a nice way to compile Android console applications.

将CMake与Android NDK结合使用是编译Android控制台应用程序的好方法。

Download CMake and android-cmake (set it up like this). If your program is called main.c, then write the following in file CMakeLists.txt:

下载CMake和android-cmake（像这样设置）。如果您的程序名为main.c，则在文件CMakeLists.txt中写入以下内容：

project(test)
cmake_minimum_required(VERSION 2.8)
add_executable(test ./main.c)

and run cmake -DCMAKE_TOOLCHAIN_FILE=$ANDTOOLCHAIN .

并运行cmake -DCMAKE_TOOLCHAIN_FILE = $ ANDTOOLCHAIN。

You will then have a Makefile for your program, you can run make to have your test executable.

然后，您将拥有一个Makefile用于您的程序，您可以运行make来让您的测试可执行文件。

#4

Try if if the agcc wrapper can help you as referenced in the Android-tricks blog. According to the blog post you want to use the bionic library, but the one already installed on the phone, not some separately compiled version.

如果agcc包装器可以帮助您在Android-tricks博客中引用，请尝试。根据你想要使用仿生库的博客文章，但是已经安装在手机上的那个，而不是一些单独编译的版本。