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Re: Now this is just annoying.

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scott@slp53.sl.home (Scott Lurndal) writes:
> James Kuyper <jameskuyper@alumni.caltech.edu> writes:
>>On 2/2/25 13:05, Scott Lurndal wrote:
>>> $ gcc --version
>>> gcc (GCC) 14.2.1 20240912 (Red Hat 14.2.1-3)
>>>
>>> $ g++ -O3 -o /tmp/a /tmp/a.cpp /tmp/a.cpp:4:1: warning: 'int main(int,
>>> const char**, const char**, const char**)' takes only zero or two
>>> arguments [-Wmain]
>>> 4 | main(int argc, const char **argv, const char **envp, const char
>>> **auxv)
>>> | ^~~~
>>>
>>> So much for backward compatibility and support for the original C++
>>> operating
>>> environment (unix).
>>
>>Does it prevent the code from compiling and executing correctly in a
>>Unix environment? If not, it has no effect on the backwards
>>compatibility of the compiler.
>
> Yes, if the programmer had used -Werror, as many do.   This is
> a recent change to g++.

That appears not to be the case.  I see the same warning by default with
every version of g++ going back to 5.3.0, from 2015.

gcc (the C compiler) does not produce this warning by default, but it
can be enabled by "-Wmain", which is included in "-Wall".  I just tried
30 versions of g++ from 5.3.0 up to 14.2.0; they all produced the warning.

>>Those are the only two forms that all implementations of C and C++ are
>>required to accept, though they are allowed to accept additional
>>implementation-defined forms. Those statements have been true of both
>>languages for as long as they've been standardized.
>>This is only a warning - fully conforming implementations are allowed to
>>warn about anything they want, such as failing to use taboo words for
>>user-defined identifiers.
>>The warning is the default for C++, and is turned on by -Wall and
>>-Wpedantic for C, because it's a reasonable thing to warn about. But if
>>you disagree with that assessment, it can be turned off by -Wno-main
>
> My problem is that g++  never warned until recently, so it broke a build
> that used -Werror.

See above.

Is it possible that you've been using a *very* old version
of g++, or that you've had some kind of configuration that dissables
the warning, or that you've confused the C++ and C compilers?

See if you can confirm that some version of g++ does not produce this
warning by default.  If so, the details could be interesting.

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
void Void(void) { Void(); } /* The recursive call of the void */

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Now this is just annoying. scott@slp53.sl.home (Scott Lurndal) - 2025-02-02 18:05 +0000
  Re: Now this is just annoying. red floyd <no.spam.here@its.invalid> - 2025-02-02 11:05 -0800
    Re: Now this is just annoying. Muttley@DastardlyHQ.org - 2025-02-03 08:55 +0000
    Re: Now this is just annoying. scott@slp53.sl.home (Scott Lurndal) - 2025-02-03 14:02 +0000
      Re: Now this is just annoying. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-02-03 15:34 -0800
  Re: Now this is just annoying. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-02-02 15:22 -0800
    Re: Now this is just annoying. scott@slp53.sl.home (Scott Lurndal) - 2025-02-03 14:05 +0000
  Re: Now this is just annoying. James Kuyper <jameskuyper@alumni.caltech.edu> - 2025-02-02 18:43 -0500
    Re: Now this is just annoying. scott@slp53.sl.home (Scott Lurndal) - 2025-02-03 14:06 +0000
      Re: Now this is just annoying. Muttley@DastardlyHQ.org - 2025-02-03 14:10 +0000
      Re: Now this is just annoying. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-02-03 15:21 -0800
        Re: Now this is just annoying. scott@slp53.sl.home (Scott Lurndal) - 2025-02-03 23:54 +0000
  Re: Now this is just annoying. Bonita Montero <Bonita.Montero@gmail.com> - 2025-02-03 15:16 +0100
    Re: Now this is just annoying. scott@slp53.sl.home (Scott Lurndal) - 2025-02-03 17:46 +0000
      Re: Now this is just annoying. Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2025-02-03 15:33 -0800
      Re: Now this is just annoying. Bonita Montero <Bonita.Montero@gmail.com> - 2025-02-04 07:20 +0100
        Re: Now this is just annoying. scott@slp53.sl.home (Scott Lurndal) - 2025-02-04 14:30 +0000
          Re: Now this is just annoying. Bonita Montero <Bonita.Montero@gmail.com> - 2025-02-04 17:25 +0100
            Re: Now this is just annoying. scott@slp53.sl.home (Scott Lurndal) - 2025-02-04 20:20 +0000
          Re: Now this is just annoying. Bonita Montero <Bonita.Montero@gmail.com> - 2025-02-05 08:53 +0100
            Re: Now this is just annoying. scott@slp53.sl.home (Scott Lurndal) - 2025-02-05 15:09 +0000
              Re: Now this is just annoying. Bonita Montero <Bonita.Montero@gmail.com> - 2025-02-05 16:11 +0100
                Re: Now this is just annoying. "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2025-02-05 11:46 -0800

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