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From: Keith Thompson <kst-u@mib.org>
Newsgroups: comp.lang.c
Subject: Re: writing a c program to substitute text
Date: Tue, 28 Feb 2017 11:40:53 -0800
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David Brown <david.brown@hesbynett.no> writes:
> On 28/02/17 17:33, Keith Thompson wrote:
[...]
>> If you use -pedantic rather than -pedantic-errors, some errors will be
>> diagnosed with non-fatal warnings; that's ok if you treat warnings
>> *very* seriously.
>> 
>
> I like to use -Werror - I /do/ treat warnings very seriously.  But
> that's me - it is not necessarily a good idea for everyone.

Using -pedantic-errors rather than just -pedantic means that diagnostics
required by the C standard are fatal.  This is, in my opinion, a good
idea (except that not all the diagnostic produced by -pedantic[-errors]
are mandatory ones; there's one about string literals that exceed a
certain length).

Using -Werror means that *all* warnings issued by gcc become fatal --
which means you're trusting the gcc authors to decide what non-requires
diagnostics you have to avoid in your code.  For example,
    struct foo obj = { 0 };
is a perfectly good idiom, but some older versions of gcc will warn
about it if struct foo has more than one scalar member.

-- 
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"