交叉编译错误“ arm-none-eabi-g ++找不到条目符号”
[英]Cross compile error “arm-none-eabi-g++ cannot find entry symbol”
问题描述
I have a problem about cross compile. 
我有关于交叉编译的问题。
#include <stdio.h>
int main()
{
printf("hello\n");
return 0;
}
this is a simple hello world code I used. 这是我使用的一个简单的hello world代码。
I'm using arm-none-eabi-g++, downloaded from mentor graphics. 我正在使用从导师图形下载的arm-none-eabi-g ++。 Here is the error. 这是错误。 I don't know what lib is missed. 我不知道会错过什么lib。
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/bin/ld: warning: cannot find entry symbol _start; defaulting to 00008018
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-abort.o): In function `abort':
abort.c:(.text+0x10): undefined reference to `_exit'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-signalr.o): In function `_kill_r':
signalr.c:(.text+0x1c): undefined reference to `_kill'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-signalr.o): In function `_getpid_r':
signalr.c:(.text+0x44): undefined reference to `_getpid'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-sbrkr.o): In function `_sbrk_r':
sbrkr.c:(.text+0x18): undefined reference to `_sbrk'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-writer.o): In function `_write_r':
writer.c:(.text+0x20): undefined reference to `_write'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-closer.o): In function `_close_r':
closer.c:(.text+0x18): undefined reference to `_close'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-fstatr.o): In function `_fstat_r':
fstatr.c:(.text+0x1c): undefined reference to `_fstat'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-isattyr.o): In function `_isatty_r':
isattyr.c:(.text+0x18): undefined reference to `_isatty'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-lseekr.o): In function `_lseek_r':
lseekr.c:(.text+0x20): undefined reference to `_lseek'
/home/kang/Utils/arm-2013.05/bin/../lib/gcc/arm-none-eabi/4.7.3/../../../../arm-none-eabi/lib/libc.a(lib_a-readr.o): In function `_read_r':
readr.c:(.text+0x20): undefined reference to `_read'
collect2: error: ld returned 1 exit status
and this is compiler version. 这是编译器版本。
$ arm-linux-gnueabi-g++ -v $ arm-linux-gnueabi-g ++ -v
Using built-in specs.
2 个解决方案
解决方案1
4 已采纳 2014-01-19 13:50:26
You downloaded the wrong toolchain. 您下载了错误的工具链。
arm-linux-gnueabi-g++ is built using arm-none-eabi , which is used for bare metal programs. arm-linux-gnueabi-g++是使用arm-none-eabi ，用于裸机程序。 This does not contain libc ie the standard libraries (glibc or eglibc) are not present in this toolchain. 它不包含libc，即该工具链中不存在标准库（glibc或eglibc）。
So, you need to download the arm-none-linux-gnueabi toolchain (ie arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2 , not arm-2013.11-24-arm-none-eabi-i686-pc-linux-gnu.tar.bz2 ). 因此，您需要下载arm-none-linux-gnueabi工具链（即arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2 ，而不是arm-2013.11-24-arm-none-eabi-i686-pc-linux-gnu.tar.bz2 ）。
To verify the above, type: 要验证以上内容，请输入：
cd /home/kang/Utils/arm-2013.05/arm-none-eabi
Here you will find only bin include lib share , and no libc directory. 在这里，您只会找到bin include lib share ，没有libc目录。
Download arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2 ; 下载arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2 ; here you'll find a folder arm-2013.05/arm-none-linux-gnueabi/libc . 在这里您会找到一个文件夹arm-2013.05/arm-none-linux-gnueabi/libc 。
You can also verify by writing: 您还可以通过以下方式进行验证：
arm-linux-eabi-g++ -print-sysroot and
arm-none-linux-gnueabi-g++ -print-sysroot
Also refer to this previous question: how to work with external libraries when cross compiling? 还请参考前面的问题： 交叉编译时如何使用外部库？
解决方案2
1 2014-01-19 14:24:27
I'm using arm-linux-gnueabi-g++.我正在使用arm-linux-gnueabi-g ++。it downloaded form mentor graphics.它下载了表单指导者图形。
This is misnamed.
这是错误的名称。
All your output suggests that Mentor Graphics have packaged a
arm-none-gnueabi toolchain and incorrectly named it
arm-linux-gnueabi (which doesn't even fit naming conventions).
您的所有输出都表明Mentor Graphics已打包了
arm-none-gnueabi工具链，并错误地将其命名为
arm-linux-gnueabi （甚至不符合命名约定）。
sorry, I mistyped my compiler.
Get yourself a version of the arm-none-linux-gnueabi toolchain (ie targetting GNU/Linux rather than EABI). 为自己获取arm-none-linux-gnueabi工具链的版本（即，针对GNU / Linux而不是EABI）。
This one will contain the GCC runtime which interfaces with the Linux operating system. 这将包含与Linux操作系统连接的GCC运行时。 All those functions you're missing right now are part of that interface. 您现在所缺少的所有这些功能都是该界面的一部分。
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