Warning usage

[Ian Lance Taylor]

Jeffrey Walton <noloader@gmail.com> writes:

> On Thu, Oct 21, 2010 at 4:01 PM, John Boncek <jboncek@hunter.com> wrote:
>> Daniel Walter-2 wrote:
>>>
>>> [SNIP]
>>
>> Compile with -fdiagnostics-show-option.  This will show with each warning
>> what option controls generation of that warning.
>
> Quite useful. Perhaps -fdiagnostics-show-option could get its own
> heading at http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html. By
> not fully reading "-Werror=" subsection, I missed it (I don't treat
> warnings as errors - I just fix the warnings on next edit).

In current mainline gcc -fdiagnostics-show-option is the default.  It's
documented in a section on diagnostic messages:

http://gcc.gnu.org/onlinedocs/gcc-4.5.1/gcc/Language-Independent-Options.html

But, yeah, especially for web usage, it would probably be nice if there
were a reference to that section from the section on warnings.

Ian