交叉编译的libevent为Android [英] Cross Compiling libevent for Android
问题描述
我卡试图交叉编译的libevent到Android，我想知道我做错了，并得到一些帮助。
我试图建立的版本的libevent-2.0.19稳定
我开始在之后的http://warpedtimes.word$p$pss.com/2010/02/03/building-open-source-libraries-with-android-ndk/和如何改写Makefile文件到android.mk？
目标设备上运行的三星Galaxy S2的CyanogenMod 7
经过多次尝试，最好的我所做的是通过运行以下步骤：
1）安装Android NDK和下载libevent的源$ C $ C
2）的Android NDK下载和〜/ Android的NDK / Android的NDK-R8B运行
3）执行：
出口ANDROID_ROOT =〜/ Android的NDK / Android的NDK-R8B
出口PATH = $ PATH：$ ANDROID_ROOT /工具链/ ARM-Linux的androideabi-4.4.3 / prebuilt / Linux的-86 /斌/
您需要导出ABI为您的设备。 armeabi-V7A是用的ARMv7或以上的设备，其他设备使用armeabi。
4）用适当的参数执行的./configure：
./配置\
主机=臂的Linux androideabi \
CC =臂的Linux androideabi-GCC \
LD =臂的Linux androideabi-LD \
CPPFLAGS = - I $ ANDROID_ROOT /平台/ Android为8 /弓臂/ usr / include目录/\
CFLAGS = - nostdlib\
LDFLAGS = - WL，-rpath链接= $ ANDROID_ROOT /平台/ Android为8 /弓臂/ usr / lib中/ -L $ ANDROID_ROOT /平台/ Android为8 /弓臂/ usr / lib目录/\
LIBS = - LC
有在此期间警告：
配置：警告：如果你想设置--build类型，不要使用--host。
如果检测到交叉编译然后交叉编译模式将被用于
（我认为它的罚款）
由于它不承认武装-Linux的androideabi作为东道主，我接到的 http://git.savannah.gnu.org/gitweb/?p=config.git;a=tree （在$ p表示在堆栈溢出$ pvious线程）
在这一点上，构建源$ C $ C运行做的时候，它仍然崩溃：
<$p$p><$c$c>/home/narseo/android-ndk/android-ndk-r8b/toolchains/arm-linux-androideabi-4.4.3/$p$pbuilt/linux-x86/bin/../lib/gcc/arm-linux-androideabi/4.4.3/../../../../arm-linux-androideabi/bin/ld: crtbegin_so.o：没有这样的文件：没有这样的文件或目录 collect2：劳工处返回1退出状态 使[2]：*** [libevent.la]错误1 使[2]：SE销售德尔上级目录«/home/narseo/libevent-source/libevent-2.0.19-stable» 使[1]：*** [全递归]错误1 使[1]：SE销售德尔上级目录«/home/narseo/libevent-source/libevent-2.0.19-stable» 使：*** [全部]错误2
不过，该文件似乎是有：
〜/ Android的NDK $ LS $ ANDROID_ROOT /平台/ Android为8 /弓臂/ usr / lib目录
crtbegin_dynamic.o的libc.a libjnigraphics.so的libstdc ++。所以
crtbegin_so.o libc.so liblog.so libthread_db.so
crtbegin_static.o libdl.so libm.a libz.so
crtend_android.o libGLESv1_CM.so libm.so
crtend_so.o libGLESv2.so的libstdc ++。一
有什么运行./configure时，我做错了什么？别的东西我不理解，甚至在看Android的NDK文件是，它是否是强制性的创建一个Android.mk或者Makefile文件就足够了。
任何帮助将是非常欢迎！
干杯
N
的注意的
这是我如何设法解决它到底：
初始路径：
出口ANDROID_ROOT =〜/ Android的NDK / Android的NDK-R8B
出口PATH = $ PATH：$ ANDROID_ROOT /工具链/ ARM-Linux的androideabi-4.4.3 / prebuilt / Linux的-86 /斌/
出口PATH = $ PATH：$ ANDROID_ROOT /工具链/ ARM-Linux的androideabi-4.4.3 / prebuilt / Linux的-86 /有/
的误差似乎发生在连接阶段，以便它不能找到crtend_so.o和crtbegin_so.o。继<一href="http://stackoverflow.com/questions/6881164/crtbegin-so-o-missing-for-android-toolchain-custom-build">crtbegin_so.o失踪的Android工具链（定制），我们添加一个符号链接到他们的源文件夹
CD音源和放大器;＆安培; LN -s $ ANDROID_ROOT /平台/ Android为8 /弓臂/ usr / lib中/ crtbegin_so.o
LN -s $ ANDROID_ROOT /平台/ Android为8 /弓臂/ usr / lib中/ crtend_so.o
./configure的命令：
./配置\
主机=臂的Linux androideabi \
CC =臂的Linux androideabi-GCC \
LD =臂的Linux androideabi-LD \
CPPFLAGS = - I $ ANDROID_ROOT /平台/ Android为8 /弓臂/ usr / include目录/\
CFLAGS = - nostdlib\
LDFLAGS = - WL，-rpath链接= $ ANDROID_ROOT /平台/ Android为8 /弓臂/ usr / lib中/ -L $ ANDROID_ROOT /平台/ Android为8 /弓臂/ usr / lib目录/\
LIBS = - LC
如果它失败，因为它不能识别系统androideabi，试图让新版本的config.sub文件和中的config.guess
它用在链接阶段崩溃。包括-lgcc在CFLAGS解决了这个问题。
试试这个
./配置主机=臂的Linux androideabi CC =$ NDK /工具链/ ARM-Linux的androideabi-4.6 / prebuilt / Linux的-86 /箱/ ARM-Linux的androideabi-GCC --sysroot = $ SYSROOTCFLAGS =' - 三月=的ARMv7-A -mfloat-ABI = softfp -mfpu =的VFPv3-D16
这对我的作品。
I'm stuck trying to cross-compile libevent to Android and I'd like to know what I'm doing wrong and get some assistance.
The version I'm trying to build is libevent-2.0.19-stable
I started following the steps described at http://warpedtimes.wordpress.com/2010/02/03/building-open-source-libraries-with-android-ndk/ and how to rewrite the Makefile into android.mk?
The Target Device is a Samsung Galaxy S2 running cyanogenMod 7
After several attempts, the best I did was by running the following steps:
1) Install android NDK and download libevent source code
2) Android NDK downloaded and running in ~/android-ndk/android-ndk-r8b
3) Execute:
export ANDROID_ROOT=~/android-ndk/android-ndk-r8b
export PATH=$PATH:$ANDROID_ROOT/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/
You need to export the ABI for your device. armeabi-v7a is for devices with ARMv7 or above, any other device uses armeabi.
4) Execute ./configure with the appropriate parameters:
./configure \
--host=arm-linux-androideabi \
CC=arm-linux-androideabi-gcc \
LD=arm-linux-androideabi-ld \
CPPFLAGS="-I$ANDROID_ROOT/platforms/android-8/arch-arm/usr/include/" \
CFLAGS="-nostdlib" \
LDFLAGS="-Wl,-rpath-link=$ANDROID_ROOT/platforms/android-8/arch-arm/usr/lib/ -L$ANDROID_ROOT/platforms/android-8/arch-arm/usr/lib/" \
LIBS="-lc"
There was a warning in the meantime:
configure: WARNING: if you wanted to set the --build type, don't use --host.
If a cross compiler is detected then cross compile mode will be used
(I assume it's fine)
As it didn't recognise arm-linux-androideabi as a host, I got a new config.guess and config.sub from http://git.savannah.gnu.org/gitweb/?p=config.git;a=tree (indicated in the previous thread in Stack Overflow)
At this point, when building the source code running "make", it still crashes:
/home/narseo/android-ndk/android-ndk-r8b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/../lib/gcc/arm-linux-androideabi/4.4.3/../../../../arm-linux-androideabi/bin/ld: crtbegin_so.o: No such file: No such file or directory
collect2: ld returned 1 exit status
make[2]: *** [libevent.la] Error 1
make[2]: se sale del directorio «/home/narseo/libevent-source/libevent-2.0.19-stable»
make[1]: *** [all-recursive] Error 1
make[1]: se sale del directorio «/home/narseo/libevent-source/libevent-2.0.19-stable»
make: *** [all] Error 2
However, the file seems to be there:
~/android-ndk$ ls $ANDROID_ROOT/platforms/android-8/arch-arm/usr/lib
crtbegin_dynamic.o libc.a libjnigraphics.so libstdc++.so
crtbegin_so.o libc.so liblog.so libthread_db.so
crtbegin_static.o libdl.so libm.a libz.so
crtend_android.o libGLESv1_CM.so libm.so
crtend_so.o libGLESv2.so libstdc++.a
Is there anything I'm doing wrong when running ./configure? Something else I didn't understand even looking at Android's NDK documentation was whether it was mandatory to create an Android.mk or if Makefile was sufficient
Any help will be very welcome!
Cheers
N
Note
This is how I managed to solve it in the end:
Initial PATH:
export ANDROID_ROOT=~/android-ndk/android-ndk-r8b
export PATH=$PATH:$ANDROID_ROOT/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/
export PATH=$PATH:$ANDROID_ROOT/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/include/
The errors seem to occur in the linking phase so as it cannot find crtend_so.o and crtbegin_so.o. Following crtbegin_so.o missing for android toolchain (custom build), we add a sym link to them in the source folder
cd source && ln -s $ANDROID_ROOT/platforms/android-8/arch-arm/usr/lib/crtbegin_so.o
ln -s $ANDROID_ROOT/platforms/android-8/arch-arm/usr/lib/crtend_so.o
The ./configure command:
./configure \
--host=arm-linux-androideabi \
CC=arm-linux-androideabi-gcc \
LD=arm-linux-androideabi-ld \
CPPFLAGS="-I$ANDROID_ROOT/platforms/android-8/arch-arm/usr/include/" \
CFLAGS="-nostdlib" \
LDFLAGS="-Wl,-rpath-link=$ANDROID_ROOT/platforms/android-8/arch-arm/usr/lib/ -L$ANDROID_ROOT/platforms/android-8/arch-arm/usr/lib/" \
LIBS="-lc"
If it fails as it does not recognize system androideabi, try to get newer versions of config.sub and config.guess
It used to crash in the linking phase. Including -lgcc on the CFLAGS solved the issue.
Try this
./configure --host=arm-linux-androideabi CC="$NDK/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86/bin/arm-linux-androideabi-gcc --sysroot=$SYSROOT" CFLAGS='-march=armv7-a -mfloat-abi=softfp -mfpu=vfpv3-d16'
It works for me.
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