我有一个关于交叉编译的问题。
#include <stdio.h>
int main()
{
printf("hellon");
return 0;
}
这是我使用的一个简单的hello world代码。
我正在使用从mentor图形下载的arm-none-eabi-g++。这是错误。 我不知道错过了什么库。
/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
这是编译器版本。
$ arm-linux-gnueabi-g++ -v
使用内置规范。 COLLECT_GCC=/home/kang/Utils/arm-2013.05/bin/arm-none-eabi-g++ COLLECT_LTO_WRAPPER=/home/kang/Utils/arm-2013.05/bin/../libexec/gcc/arm-none-eabi/4.7.3/lto-wrapper 目标：无臂 配置：/scratch/jbrown/2013.05-arm-eabi-release/src/gcc-4.7-2013.05/configure --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu --target=arm-none-eabi --enable-threads --disable-libmudflap --disable-libssp --disable-libstdcxx-pch --enable-extra-sgxxlite-multilibs --with-gnu-as --with-gnu-ld --with-specs='%{save-temps： -fverbose-asm} -D__CS_SOURCERYGXX_MAJ__=2013 -D__CS_SOURCERYGXX_MIN__=5 -D__CS_SOURCERYGXX_REV__=23 %{O2：%{！fno-remove-local-statics： -fremove-local-statics}} %{O*：%{O|答02答12答22Os：;：%{！fno-remove-local-statics： -fremove-local-statics}}}' --enable-languages=c，c++ --disable-shared --enable-lto --with-newlib --with-pkgversion='Sourcery CodeBench Lite 2013.05-23' --with-bugurl=https：//sourcery.mentor.com/GNUToolchain/--disable-nls --prefix=/opt/codesourcery --with-headers=yes --with-sysroot=/opt/codesourcery/arm-none-eabi --with-build-sysroot=/scratch/jbrown/2013.05-arm-eabi-release/install/arm-none-eabi --with-gmp=/scratch/jbrown/2013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --with-mpfr=/scratch/jbrown/2013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --with-mpc=/scratch/jbrown/2013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --with-ppl=/scratch/jbrown/2013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --with-host-libstdcxx='-static-libgcc -wl，-Bstatic，-lstdc++，-Bdynamic -lm' --with-cloog=/scratch/jbrown/2013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --with-libelf=/scratch/jbrown/2013.05-arm-eabi-release/obj/pkg-2013.05-23-arm-none-eabi/arm-2013.05-23-arm-none-eabi.extras/host-libs-i686-pc-linux-gnu/usr --disable-libgomp --disable-libitm --enable-poison-system-directory --with-build-time-tools=/scratch/jbrown/2013.05-arm-eabi-release/install/arm-none-eabi/bin --with-build-time-tools=/scratch/jbrown/2013.05-arm-eabi-release/install/arm-none-eabi/bin 线程模型：单个 gcc 版本 4.7.3(源码代码工作台精简版 2013.05-23)
您下载了错误的工具链。
arm-linux-gnueabi-g++是使用arm-none-eabi构建的，用于裸机程序。这不包含libc，即标准库(glibc或eglibc)不存在于此工具链中。
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
)。
要验证上述内容，请键入：
cd /home/kang/Utils/arm-2013.05/arm-none-eabi
在这里你只会找到bin include lib share，没有libc目录。
下载arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2;在这里你会找到一个文件夹arm-2013.05/arm-none-linux-gnueabi/libc。
您也可以通过书面形式进行验证：
arm-linux-eabi-g++ -print-sysroot and
arm-none-linux-gnueabi-g++ -print-sysroot
另请参阅前面的问题：交叉编译时如何使用外部库？
我正在使用arm-linux-gnueabi-g++。 它从Mentor Graphics下载。
这是错误的命名。您的所有输出都表明 Mentor Graphics 打包了一个
arm-none-gnueabi工具链，并错误地将其命名为arm-linux-gnueabi(这甚至不符合命名约定)。
抱歉，我输入了错误的编译器。我正在使用 arm-none-eabi-g++
给自己一个arm-none-linux-gnueabi工具链的版本(即针对GNU/Linux而不是EABI)。
这个将包含与Linux操作系统接口的GCC运行时。您现在缺少的所有这些功能都是该界面的一部分。