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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: [Solved] Need some help getting to my feet
Date: Fri, 04 May 2018 11:00:01 -0700
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Keith Thompson <kst-u@mib.org> writes:
> bartc <bc@freeuk.com> writes:
[...]
>> Yes, but ... suppose someone writes foo() by mistake. How is that
>> going to be detected?
>
> It likely won't be detected by the compiler.  gcc doesn't complain
> by default, or with a reasonable set of command-line options.
> There might be an option that will cause it to warn about it.
> (clang, with reasonable options, warns about an incorrect call but
> not about the declaration.)

As David Brown points out, the option is "-Wstrict-prototypes" (which is
not included in "-Wextra" or -Wall").

[...]

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"