交叉编译为什么ld找不到共享库/如何进一步调试? [英] cross compiling why cant ld find shared library / how to debug further?
问题描述
我正在尝试为我的arm路由器交叉编译和链接ubuntu上的聚合，但出现以下错误.过去，我认为我可以通过设置适当的环境变量来解决此问题，但这一次不起作用.谁能帮我弄清楚为什么这可能行不通:
Im trying to cross-compile and link aggregate on ubuntu for my arm-router and I get the following error. In the past I think I have been able to workaround this by setting the appropriate environment variable but this time is not working . Can anyone help me figure out why this might not work:
/home/ubuntu/Downloads/toolchain-arm_cortex-a9_gcc-4.9-linaro_musl-1.1.2_eabi/bin/../lib64/gcc/arm-openwrt-linux-muslgnueabi/4.9.1/../../../../arm-openwrt-linux-muslgnueabi/bin/ld:
cannot find -lpopt
但是libpopt.so存在于:
lrwxrwxrwx 1 root root 34 Sep 10 12:46 /lib/x86_64-linux-gnu/libpopt.so -> /lib/x86_64-linux-gnu/libpopt.so.0
however libpopt.so exists in :
lrwxrwxrwx 1 root root 34 Sep 10 12:46 /lib/x86_64-linux-gnu/libpopt.so -> /lib/x86_64-linux-gnu/libpopt.so.0
我无奈地将以下环境变量设置为无用.
I set the following environment variables , in order of desperation, to no avail.
LIBRARY_PATH=/lib/x86_64-linux-gnu/
LD_LIBRARY_PATH=/lib/x86_64-linux-gnu/
PATH=/lib/x86_64-linux-gnu/:/usr/include/:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
LIBRARY_PATH=/lib/x86_64-linux-gnu/
LD_LIBRARY_PATH=/lib/x86_64-linux-gnu/
PATH=/lib/x86_64-linux-gnu/:/usr/include/:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
考虑到可能是因为它可能是目标体系结构问题(例如，我需要针对交叉编译的目标而构建的libpopt.so)引起的，所以我将libpopt.so从路由器复制到了我的ubuntu并设置了再次的路径.再次无济于事.
Thinking that it might be caused because it might be a target architecture issue (ie maybe i need libpopt.so built for the target of the cross-compile) I copied the libpopt.so from the router to my ubuntu and set the paths again. Again to no avail.
我可能做错了什么?
谢谢
推荐答案
我必须在Makefile中使用-L指定lib的路径，如下所示: -L/lib/x86_64-linux-gnu/
I had to specify the path to the lib using -L in the Makefile as follows: -L/lib/x86_64-linux-gnu/
另外，我 did 必须使用libpopt.so的目标体系结构版本，该版本已复制到新目录中，并在-L/home/Downloads/lib/中使用.无论出于什么原因，都没有选择LIBRARY_PATH和LD_LIBRARY_PATH.
additionally I did have to use the target arhchitecture version of libpopt.so which i copied into a new dir and used that in the argument to -L/home/Downloads/lib/. For whatever reason LIBRARY_PATH and LD_LIBRARY_PATH were not being picked up.
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