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Re: RFC: -Wall by default

On Sat, Apr 7, 2012 at 5:41 PM, Dave Korn <> wrote:
> On 05/04/2012 10:46, Gabriel Dos Reis wrote:
>> On Thu, Apr 5, 2012 at 4:39 AM, Richard Guenther
>> <> wrote:
>>> Btw, it would be more reasonable to enable a subset of warnings that
>>> we enable at -Wall by default.
>> Which ones for example?
>> Here is a (partial) list:
> ?Your list seems a bit short, here's what today's trunk build says for -Wall:

Thank you Dave for the correction.

>> -Waddress
>> -Warray-bounds (only with `-O2')
>> -Wc++11-compat
>> -Wchar-subscripts
>> -Wenum-compare (in C/Objc; this is on by default in C++)
>> -Wimplicit-int (C and Objective-C only)
>> -Wimplicit-function-declaration (C and Objective-C only)
>> -Wcomment
>> -Wformat
>> -Wmain (only for C/ObjC and unless `-ffreestanding')
>> -Wmaybe-uninitialized
>> -Wmissing-braces
>> -Wnonnull
>> -Wparentheses
>> -Wpointer-sign
>> -Wreorder
>> -Wreturn-type
>> -Wsequence-point
>> -Wsign-compare (only in C++)
>> -Wstrict-aliasing
>> -Wstrict-overflow=1
>> -Wswitch
>> -Wtrigraphs
>> -Wuninitialized
>> -Wunknown-pragmas
>> -Wunused-function
>> -Wunused-label
>> -Wunused-value
>> -Wunused-variable
>> -Wvolatile-register-var
> ?IMHO we should move the -Wunused ones into -Wextra if we're going to turn on
> -Wall by default. ?The rest seem pretty reasonable defaults to me.

Even if we do not turn on -Wall by default, do you think we should
have -Wunused in -Wall?

-- Gaby

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