I'm trying to write a program that uses tgkill to send a signal to a specific thread, but whenever I compile it with gcc I get an error about an undefined reference to 'tgkill'. I tried compiling with -lpthread but it didn't help. I've googled and googled and can't come up with any answers. How do I get it to compile??
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问题:
回答1:
From the tgkill()
manpage:
Glibc does not provide wrappers for these system calls; call them using syscall(2).
回答2:
You might want to use something like this instead.
tgid=getpid();
tid=gettid();
syscall(SYS_tgkill, tgid, tid, signalname));
回答3:
As noted in another answer, glibc does not provide wrappers for tkill()
or tgkill()
.
Instead, you're supposed to use pthread_kill()
.