试图编译OpenSSL库libcrypto.a包装时错误 [英] error when trying to compile wrapper for openssl library libcrypto.a
问题描述
我试图建立围绕Android的libcrypto.a包装一个动态库在
描述<一个href=\"http://wiki.openssl.org/index.php/FIPS_Library_and_Android#Using_FIPS_OpenSSL_in_a_real_Application\" rel=\"nofollow\">http://wiki.openssl.org/index.php/FIPS_Library_and_Android#Using_FIPS_OpenSSL_in_a_real_Application
我公司生产的libcrypto.a在页面上的建议,但是当我尝试编译我的wrapper.c我得到一个链接错误,'atexit对
的多个定义下面是我使用的编译命令行:
ARM-Linux的androideabi-GCC wrapper.c -fPIC -shared -I在/ usr /本地/ SSL / Android的14 /包括-Wl,-Bstatic -lcrypto -L / USR /本地/ SSL / Android的14 / lib目录-o libwrapper.so --sysroot = /用户/ scoleman / Android的NDK-r9d /平台/ Android的14 /弓臂轮候册,-Bdynamic
下面是结果:
<$p$p><$c$c>/Users/scoleman/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/$p$pbuilt/darwin-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld:错误:/Users/scoleman/android-ndk-r9d/platforms/android-14/arch-arm/usr/lib/libc.a(atexit.o):atexit对的多重定义/Users/scoleman/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/$p$pbuilt/darwin-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /Users/scoleman/android-ndk-r9d/platforms/android-14/arch-arm/usr/lib/crtbegin_so.o:这里previous定义
/Users/scoleman/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/$p$pbuilt/darwin-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld:错误:无法找到-ldl
collect2:劳工处返回1退出状态
下面是我的wrapper.c:
的#include&LT;&string.h中GT;
#包括LT&;&jni.h GT;INT MY_FIPS_mode(){
INT模式=模式= FIPS_mode();
返回模式;
}
下面是我使用编译命令行:在arm-linux的-androideabi-GCC wrapper.c -fPIC -shared -I在/ usr /本地/ SSL / Android的14 /包括-Wl,-Bstatic -lcrypto -L在/ usr /本地/ SSL / Android的14 / lib目录 - Ølibwrapper.so --sysroot = /用户/ scoleman / Android的NDK-r9d /平台/ Android的14 /弓臂轮候册,-Bdynamic
我能够与您的命令行复制的问题。我将接近这个问题的方法是(增加了可读性换行):
ARM-Linux的androideabi-GCC wrapper.c -fPIC -shared -o libwrapper.so
--sysroot = ... / Android的NDK-r9d /平台/ Android的14 /弓臂
-I在/ usr /本地/ SSL / Android的14 /包括
/usr/local/ssl/android-14/lib/libssl.a
/usr/local/ssl/android-14/lib/libcrypto.a
-ldl
- SYSROOT
将在平台的头文件和库为Android 4.0(API 14)带来的。这应该是在哪里定义 atexit对
。我觉得 -Bstatic
和 -Bdynamic
可能是复杂的事情,因为 atexit对
由双方提供的的libc.a
和 crtbegin_so.o
。
我避免 -Bstatic
和 -Bdynamic
。当我想静态链接,我专门召唤出静态库的完整路径,如 /usr/local/ssl/android-14/lib/libcrypto.a
。请记住,归档是目标文件( * 0
),所以你可以用它随时随地可以使用的目标文件。
从页面使用 setenv-android.sh
脚本和源,我的不的能够复制:
$。 ./setenv-android.sh
ANDROID_NDK_ROOT中:/ opt / Android的NDK-R9
ANDROID_EABI ARM-Linux的androideabi-4.6
ANDROID_API:Android的14
ANDROID_SYSROOT中:/ opt / Android的NDK-R9 /平台/ Android的14 /弓臂
ANDROID_TOOLCHAIN:/opt/android-ndk-r9/toolchains/arm-linux-androideabi-4.6/$p$pbuilt/darwin-x86_64/bin
CROSS_COMPILE ARM-Linux的androideabi-
ANDROID_DEV中:/ opt / Android的NDK-R9 /平台/ Android的14 /弓臂的/ usr$猫wrapper.c
#包括LT&;&string.h中GT;
#包括LT&;&jni.h GT;
#包括LT&;的OpenSSL / evp.h&GT;INT MY_FIPS_mode(){
INT模式= FIPS_mode();
返回模式;
}$臂Linux的androideabi-GCC wrapper.c -fPIC -shared -o libwrapper.so \\
&GT; --sysroot = $ ANDROID_SYSROOT \\
&GT; -I在/ usr /本地/ SSL / Android的14 /包括\\
&GT; /usr/local/ssl/android-14/lib/libssl.a \\
&GT; /usr/local/ssl/android-14/lib/libcrypto.a \\
&GT; -ldl$ LS
libwrapper.so setenv-android.sh wrapper.c$臂Linux的androideabi-readelf -h libwrapper.so
ELF头:
魔:1408米45 4C 46 01 01 01 00 00 00 00 00 00 00 00 00
类别:ELF32
数据:2的补,小尾数
版本:1(电流)
OS / ABI:UNIX - 系统V
ABI版本:0
类型:DYN(共享对象文件)
机:ARM
版本:为0x1
入口地址:为0x0
程序头开始:52(字节到文件)
节头的开始:244660(字节到文件)
标志:0x5000000,版本5 EABI
这个头的大小:52(字节)
程序头的尺寸:32(字节)
程序头数:7
节头的大小:40(字节)
节头数:34
节头字符串表指数:33$臂Linux的androideabi纳米-D libwrapper.so | grep的MY_FIPS_mode
00009fa4ŧMY_FIPS_mode
I'm trying to build a dynamic library for android wrapper around libcrypto.a as described in
http://wiki.openssl.org/index.php/FIPS_Library_and_Android#Using_FIPS_OpenSSL_in_a_real_Application
I've produced the libcrypto.a as suggested on the page, but when I try to compile my wrapper.c I get a linker error, multiple definition of 'atexit'
Here's the command line I'm using to compile:
arm-linux-androideabi-gcc wrapper.c -fPIC -shared -I/usr/local/ssl/android-14/include -Wl,-Bstatic -lcrypto -L/usr/local/ssl/android-14/lib -o libwrapper.so --sysroot=/Users/scoleman/android-ndk-r9d/platforms/android-14/arch-arm -Wl, -Bdynamic
Here are the results:
/Users/scoleman/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: /Users/scoleman/android-ndk-r9d/platforms/android-14/arch-arm/usr/lib/libc.a(atexit.o): multiple definition of 'atexit'
/Users/scoleman/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: /Users/scoleman/android-ndk-r9d/platforms/android-14/arch-arm/usr/lib/crtbegin_so.o: previous definition here
/Users/scoleman/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld: error: cannot find -ldl
collect2: ld returned 1 exit status
Here's my wrapper.c:
#include <string.h>
#include <jni.h>
int MY_FIPS_mode() {
int mode = mode = FIPS_mode();
return mode;
}
Here's the command line I'm using to compile:
arm-linux-androideabi-gcc wrapper.c -fPIC -shared -I/usr/local/ssl/android-14/include -Wl,-Bstatic -lcrypto -L/usr/local/ssl/android-14/lib -o libwrapper.so --sysroot=/Users/scoleman/android-ndk-r9d/platforms/android-14/arch-arm -Wl, -Bdynamic
I was able to duplicate the issue with your command line. The way I would approach this is (line breaks added for readability):
arm-linux-androideabi-gcc wrapper.c -fPIC -shared -o libwrapper.so
--sysroot=.../android-ndk-r9d/platforms/android-14/arch-arm
-I/usr/local/ssl/android-14/include
/usr/local/ssl/android-14/lib/libssl.a
/usr/local/ssl/android-14/lib/libcrypto.a
-ldl
--sysroot
will bring in the platform headers and libraries for Android 4.0 (API 14). That should be where atexit
is defined. I think the -Bstatic
and -Bdynamic
might be complicating things since atexit
was provided by both libc.a
and crtbegin_so.o
.
I avoid -Bstatic
and -Bdynamic
. When I want static linking, I specifically call out the full pathname of the static library, like /usr/local/ssl/android-14/lib/libcrypto.a
. Remember, an archive is a collection of object files (*.o
), so you can use it wherever you can use an object file.
Using the setenv-android.sh
script from the page and your source, I was not able to duplicate:
$ . ./setenv-android.sh
ANDROID_NDK_ROOT: /opt/android-ndk-r9
ANDROID_EABI: arm-linux-androideabi-4.6
ANDROID_API: android-14
ANDROID_SYSROOT: /opt/android-ndk-r9/platforms/android-14/arch-arm
ANDROID_TOOLCHAIN: /opt/android-ndk-r9/toolchains/arm-linux-androideabi-4.6/prebuilt/darwin-x86_64/bin
CROSS_COMPILE: arm-linux-androideabi-
ANDROID_DEV: /opt/android-ndk-r9/platforms/android-14/arch-arm/usr
$ cat wrapper.c
#include <string.h>
#include <jni.h>
#include <openssl/evp.h>
int MY_FIPS_mode() {
int mode = FIPS_mode();
return mode;
}
$ arm-linux-androideabi-gcc wrapper.c -fPIC -shared -o libwrapper.so \
> --sysroot=$ANDROID_SYSROOT \
> -I/usr/local/ssl/android-14/include \
> /usr/local/ssl/android-14/lib/libssl.a \
> /usr/local/ssl/android-14/lib/libcrypto.a \
> -ldl
$ ls
libwrapper.so setenv-android.sh wrapper.c
$ arm-linux-androideabi-readelf -h libwrapper.so
ELF Header:
Magic: 7f 45 4c 46 01 01 01 00 00 00 00 00 00 00 00 00
Class: ELF32
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - System V
ABI Version: 0
Type: DYN (Shared object file)
Machine: ARM
Version: 0x1
Entry point address: 0x0
Start of program headers: 52 (bytes into file)
Start of section headers: 244660 (bytes into file)
Flags: 0x5000000, Version5 EABI
Size of this header: 52 (bytes)
Size of program headers: 32 (bytes)
Number of program headers: 7
Size of section headers: 40 (bytes)
Number of section headers: 34
Section header string table index: 33
$ arm-linux-androideabi-nm -D libwrapper.so | grep MY_FIPS_mode
00009fa4 T MY_FIPS_mode
这篇关于试图编译OpenSSL库libcrypto.a包装时错误的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!