I was experimenting with a few timer functions and ended up with the above linker error. Someone on the net suggested to pass -lrt to gcc and it worked! What is '-lrt' and how did it help to overcome this error?
我尝试了一些定时器函数，最后得到了上面的链接器错误。网络上有人建议把-lrt传给gcc，它成功了!什么是-lrt，它如何帮助克服这个错误?
I looked into gcc --help but couldn't find these options and the man page of gcc ( which is too huge ) also dint give much insight into this.
我查看了gcc——帮助但是没有找到这些选项，而且gcc的手册页(太大了)也没有提供更多的信息。
3 个解决方案
#1
1
It adds the rt library to the linker (see librt) which amongst other things defines timer_getoverrun.
它将rt库添加到链接器(参见librt)，其中定义了timer_getoverrun。
#2
1
It's not in the gcc man page, because it's not an option. It's a library ( -l stands for library, this is the way, libs are passed to the linker)
它不在gcc手册页中，因为它不是选项。它是一个库(-l代表library，这是方法，libs被传递给链接器)
rt is a time library. timer_getoverrun is just defined there.
rt是一个时间库。timer_getoverrun就是在这里定义的。
#3
1
The timer_getoverrun() function is implemented in librt.so. From the timer_getoverrun(2) man page:
timer_getoverrun()函数在librt.so中实现。来自timer_getoverrun(2)手册页:
SYNOPSIS ... Link with -lrt.
#1
1
It adds the rt library to the linker (see librt) which amongst other things defines timer_getoverrun.
它将rt库添加到链接器(参见librt)，其中定义了timer_getoverrun。
#2
1
It's not in the gcc man page, because it's not an option. It's a library ( -l stands for library, this is the way, libs are passed to the linker)
它不在gcc手册页中，因为它不是选项。它是一个库(-l代表library，这是方法，libs被传递给链接器)
rt is a time library. timer_getoverrun is just defined there.
rt是一个时间库。timer_getoverrun就是在这里定义的。
#3
1
The timer_getoverrun() function is implemented in librt.so. From the timer_getoverrun(2) man page:
timer_getoverrun()函数在librt.so中实现。来自timer_getoverrun(2)手册页:
SYNOPSIS ... Link with -lrt.