Date: Tue, 21 Nov 2023 15:12:51 +0100 From: Mehdi Khawari <iam.mehdikhawari@gmail.com> To: freebsd-questions@freebsd.org Subject: What are __dead2 and __unused in the source code? Message-ID: <CACDe3ozkC9W4cJzGGUFYxFvKK8hTY7WaWyXb=BSUdi4d-xgd5w@mail.gmail.com>
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Hi, everyone!
I'm just learning by studying the source code of some basic tools
included in the base and I had a question.
Why is __dead2 applied to some function like usage?
static void usage(void) __dead2;
What is the reason that __unused is applied to the function argument like here:
static void
siginfo_handler(int sig __unused)
{
siginfo = 1;
}
These snippets are from /bin/chmod/chmod.c. Where can I find more
information on this?
Kind regards
Mehdi Khawari
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