即使它们存在,ld也找不到库

Question

编辑:显然〜在这里不起作用,只在shell中,用'$ HOME'替换〜它应该有效,感谢所有回答的人.

试图在这里编译一个项目,但它似乎无法找到库,即使它们存在,这里是我的行的输出和库存在的证明.

pi@raspberrypi ~/Car $ g++ Car.cpp -I~/git/robidouille/raspicam_cv -L~/git/robidouille/raspicam_cv -lraspicamcv -L~/git/userland/build/lib -lmmal_core -lmmal -lmmal_util -lvcos -lbcm_host -I/usr/include/opencv -lopencv_highgui -lopencv_core -lopencv_video -lopencv_imgproc -lpthread -lm
/usr/bin/ld: cannot find -lraspicamcv
/usr/bin/ld: cannot find -lmmal_core
/usr/bin/ld: cannot find -lmmal
/usr/bin/ld: cannot find -lmmal_util
/usr/bin/ld: cannot find -lvcos
/usr/bin/ld: cannot find -lbcm_host
collect2: ld returned 1 exit status
pi@raspberrypi ~/Car $ find ~/ -name libraspicamcv.so
/home/pi/git/robidouille/raspicam_cv/libraspicamcv.so
pi@raspberrypi ~/Car $ find ~/ -name libmmal_core.so
/home/pi/git/userland/build/lib/libmmal_core.so
pi@raspberrypi ~/Car $ find ~/ -name libmmal.so
/home/pi/git/userland/build/lib/libmmal.so
pi@raspberrypi ~/Car $

编辑:尝试过

ld -L~/git/userland/build/lib -lmmal_core --verbose

它给了我

attempt to open ~/git/userland/build/lib/libmmal_core.so failed

但是〜/ git/userland/build/lib/libmmal_core.so确实存在,所以出于某种原因,它似乎无法在文件存在时打开它.

Answer 1

将"〜"扩展到您的主目录是shell的一个特性,它不会在"内部"扩展一个参数,例如-I~/git/robidouille/raspicam_cv.

当链接器寻找库时,它不会询问你的shell它在哪里 - 它试图找到文字路径"〜/ git/robidouille/raspicam_cv",它不存在.

将"〜"替换为"$ HOME",它将由shell扩展.