我有关于交叉编译的问题。
#include <stdio.h> int main() { printf("hello\n"); return 0; }
这是我使用的一个简单的hello world代码。
我正在使用从导师图形下载的arm-none-eabi-g ++。这是错误。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
这是编译器版本。
$ arm-linux-gnueabi-g ++ -v
使用内置规格。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:arm-none- eabi配置为:/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 =’%{保存温度:-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 | O0 | O1 | O2 | Os:;:%{!fno-remove-local- statics:-fremove -local-statics}}}’–enable-languages = c,https://sourcery.mentor.com/GNUToolchain/--disable- nls –prefix = / opt / codesourcery –with-headers =是–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-启用中毒系统目录–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(Sourcery CodeBench Lite 2013.05-23)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-directories –with-build-时间工具= / 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(Sourcery CodeBench Lite 2013.05-23)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-directories –with-build-时间工具= / 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(Sourcery CodeBench Lite 2013.05-23)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线程型号:单一gcc版本4.7.3(Sourcery CodeBench Lite 2013.05-23)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线程型号:单一gcc版本4.7.3(Sourcery CodeBench Lite 2013.05-23)
您下载了错误的工具链。
arm-linux-gnueabi-g++是使用建造的arm-none-eabi,用于裸机程序。它不包含 libc, 即该工具链中不存在标准库(glibc或eglibc)。
arm-linux-gnueabi-g++
arm-none-eabi
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不是arm-2013.11-24-arm-none-eabi-i686-pc- linux-gnu.tar.bz2)。
arm-none-linux-gnueabi
arm-2013.05-24-arm-none-linux- gnueabi-i686-pc-linux-gnu.tar.bz2
arm-2013.11-24-arm-none-eabi-i686-pc- linux-gnu.tar.bz2
要验证以上内容,请输入:
cd /home/kang/Utils/arm-2013.05/arm-none-eabi
在这里,您只会找到bin include lib share,而没有libc目录。
bin include lib share
libc
下载arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2; 在这里您会找到一个文件夹arm-2013.05/arm-none-linux-gnueabi/libc。
arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
arm-2013.05/arm-none-linux-gnueabi/libc
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