在树莓中交叉编译qt中构建应用程序时出错 [英] Error while building app in cross-compiled qt in raspberry

问题描述

我试图在树莓派中编译和应用一个交叉编译的 qt5 。
此应用程序基于此 rf24l01 库< a>。当我从RPi编译一个 cpp 程序，一切正常，但当我尝试从我的电脑运行 ubuntu 12.04（32bits）以下错误是通过：

I'm trying to build and app on a cross-compiled qt5 in a raspberry pi. This app is based on this rf24l01 library. When I compile a cpp program from the RPi, everything works fine, but when I tried from my pc running ubuntu 12.04 (32bits) the following error is through:

error: cannot find -lrf24-bcm

我在专业文件中使用这一行指向库：

I point to the library using this line in the pro file:

LIBS += -L/mnt/rpi/usr/local/lib -lrf24-bcm

AFAIK，这是lib所在的路径：

AFAIK, this is the path where the lib is located:

这是`ls / mnt / rpi / usr / local /

This is the result of `ls /mnt/rpi/usr/local/lib:

librf24-bcm.so      libwiringPiDev.so      libwiringPi.so.2.0
librf24-bcm.so.1    libwiringPiDev.so.2.0  python2.6
librf24-bcm.so.1.0  libwiringPi.so         python2.7

最后，这是详细出现的错误：

Finally, this is the appeared error in detail:

/home/atron/opt/gcc-4.7-linaro-rpi-gnueabihf / bin / arm-linux-gnueabihf-g ++ -Wl，-rpath- Tutorials link，/ mnt / rpi / opt / vc / lib -Wl，-rpath-link，/ mnt / rpi / usr / lib / arm -linux-gnueabihf -Wl，-rpath- Tutorials link，/ mnt / rpi / lib / arm-linux-gnueabihf --sysroot = / mnt / rpi -Wl，-rpath，/ usr / local / opt / lib -o homekit main.o -L / mnt / rpi / usr / local / lib -lrf24-bcm -L / mnt / rpi / usr / local / opt / lib -lQt5Network -L / usr / local / opt / lib -lQt5Core -lpthreadã
/home/atron/opt/gcc-4.7-linaro-rpi-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/4.7.2/../。 ./../../arm-linux-gnueabihf/bin/ld：找不到-lrf24-bcm

collect2：error：ld returned 1 exit status

/home/atron/opt/gcc-4.7-linaro-rpi-gnueabihf/bin/arm-linux-gnueabihf-g++ -Wl,-rpath-
link,/mnt/rpi/opt/vc/lib -Wl,-rpath-link,/mnt/rpi/usr/lib/arm-linux-gnueabihf -Wl,-rpath-
link,/mnt/rpi/lib/arm-linux-gnueabihf --sysroot=/mnt/rpi -Wl,-rpath,/usr/local/opt/lib -o homekit main.o -L/mnt/rpi/usr/local/lib -lrf24-bcm -L/mnt/rpi/usr/local/opt/lib -lQt5Network -L/usr/local/opt/lib -lQt5Core -lpthread
/home/atron/opt/gcc-4.7-linaro-rpi-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/4.7.2/../../../../arm-linux-gnueabihf/bin/ld: cannot find -lrf24-bcm
collect2: error: ld returned 1 exit status

我做错了什么？

提前感谢，

推荐答案

我不知道这是否技术上正确，但解决了我的问题。
主要想法是创建库的符号链接到我的电脑 / usr / local / lib 文件夹：

I don't know if this is "technically" correct, but solved my problem. The main idea is create a symbolic link of the library to my pc /usr/local/lib folder:

sudo ln -s /mnt/rpi/usr/local/lib/librf24-bcm.so /usr/local/lib/librf24-bcm.so
sudo ln -s /mnt/rpi/usr/local/lib/librf24-bcm.so.1 /usr/local/lib/librf24-bcm.so.1
sudo ln -s /mnt/rpi/usr/local/lib/librf24-bcm.so.1.0 /usr/local/lib/librf24-bcm.so.1.0

然后，在QT创建者 * pro 文件中，您只需要添加lib引用：

Then, on QT creator *pro file you only need to add the lib reference:

LIBS=-lrf24-bcm

我希望这可以帮助一些新手喜欢我。
谨慎，

I hope this could help to some newbie like me. Regards,

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