[英]Undefined reference usb_init()
I am working on customized USB driver for keyboard using libusb. 我正在使用libusb为键盘定制USB驱动程序。 I wrote a simple program and tried to compile that program i received warning and output file is not generated.
我编写了一个简单程序,并尝试编译该程序,但收到警告,但未生成输出文件。
This is my program. 这是我的程序。
#include <stdio.h>
#include <libusb-1.0/libusb.h>
void main(){
usb_init(NULL);
return;
}
The error message is 错误消息是
sample.c: In function ‘main’:
sample.c:7:3: warning: implicit declaration of function ‘usb_init’ [-Wimplicit-function-declaration]
usb_init(NULL);
^
/tmp/ccYbyFAK.o: In function `main':
sample.c:(.text+0xf): undefined reference to `usb_init'
collect2: error: ld returned 1 exit status
I run this commands to set the library lining flag, commands are successfully executed. 我运行此命令来设置库衬标志,命令已成功执行。
pkg-config --list-all
pkg-config --libs libusb
i tried following commands to execute my prog 我尝试按照以下命令执行我的编
gcc -o output sample.c -lusb-1.0
gcc -o output sample.c -libusb-1.0
Please help me resolve this issue 请帮我解决这个问题
You are including the header file for libusb 1.0, but you are using usb_init
, a function that is not part of it's API. 您将包含libusb 1.0的头文件,但您使用的是
usb_init
,该函数不属于其API的一部分。 Note that libusb 0.1 is really old and has a different API than libusb 1.0. 请注意,libusb 0.1确实很旧,并且具有与libusb 1.0不同的API。 You should refer to the documentation of libusb 1.0 to learn what functions are supported in libusb 1.0:
您应该参考libusb 1.0的文档以了解libusb 1.0支持哪些功能:
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