c++ - Hidapi无法在ubuntu下编译任何代码

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7年前关闭。




我正在尝试在Ubuntu 12.04下使用hidapi库。我已经按照github中的教程进行操作，但是，即使附带的测试代码也无法正常工作。它总是抱怨 undefined reference 。我找不到任何解决方案。即使成功安装后，我也无法在任何地方找到该库。

我正在尝试编译hidtest.cpp，第一个错误在hid_init()行中。

有人可以帮我吗？

编辑:

make all

Building target: hidtest

Invoking: Cross G++ Linker

g++  -o "hidtest"  ./src/hidtest.o

./src/hidtest.o: In function `main':
/../src/hidtest.cpp:35: undefined reference to `hid_init'
/../src/hidtest.cpp:38: undefined reference to `hid_enumerate'
/../src/hidtest.cpp:53: undefined reference to `hid_free_enumeration'
/../src/hidtest.cpp:63: undefined reference to `hid_open'
/../src/hidtest.cpp:71: undefined reference to `hid_get_manufacturer_string'
/../src/hidtest.cpp:78: undefined reference to `hid_get_product_string'
/../src/hidtest.cpp:85: undefined reference to `hid_get_serial_number_string'
/../src/hidtest.cpp:93: undefined reference to `hid_get_indexed_string'
/../src/hidtest.cpp:99: undefined reference to `hid_set_nonblocking'
/../src/hidtest.cpp:103: undefined reference to `hid_read'
/../src/hidtest.cpp:111: undefined reference to `hid_send_feature_report'
/../src/hidtest.cpp:120: undefined reference to `hid_get_feature_report'
/../src/hidtest.cpp:123: undefined reference to `hid_error'
/../src/hidtest.cpp:137: undefined reference to `hid_write'
/../src/hidtest.cpp:140: undefined reference to `hid_error'
/../src/hidtest.cpp:146: undefined reference to `hid_write'
/../src/hidtest.cpp:155: undefined reference to `hid_read'
/../src/hidtest.cpp:173: undefined reference to `hid_close'
/../src/hidtest.cpp:176: undefined reference to `hid_exit'

collect2: ld returned 1 exit status

make: *** [hidtest] Error 1

这是在Ubuntu 12.04下并使用Eclipse Juno完成的

最佳答案

这些是链接器错误:



最初我以为您没有将代码与hidapi库链接，但是我无意间设法重现了您的确切错误的唯一方法是将gcc参数的顺序错误。这将失败，输出相同:

$ g++ -c -Ihidapi hidtest/hidtest.cpp -o hidtest/hidtest.o
$ g++ -Llinux/.libs -lhidapi-hidraw hidtest/hidtest.o -o test

您的目标文件需要在链接阶段的gcc参数中出现在库之前。

以下工作正常:

$ g++ -c -Ihidapi hidtest/hidtest.cpp -o hidtest/hidtest.o
$ g++ -Llinux/.libs hidtest/hidtest.o -lhidapi-hidraw -o test
$ LD_LIBRARY_PATH=linux/.libs ./test

请注意，我必须使用-I，-L和LD_LIBRARY_PATH，因为我没有安装hidapi，所以我做了hidapi源文件夹中的所有操作。

关于c++ - Hidapi无法在ubuntu下编译任何代码，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/15433774/