[wwwdocs] Update GCC5 changes.html

I've put together a few lines describing what I (except
-fsanitize=alignment) implemented for GCC 5.
It's the file wwwdocs/htdocs/gcc-5/changes.html.

Ok?


	Marek

Ping.

On Wed, Aug 13, 2014 at 01:33:08PM +0200, Marek Polacek wrote:
> I've put together a few lines describing what I (except
> -fsanitize=alignment) implemented for GCC 5.
> It's the file wwwdocs/htdocs/gcc-5/changes.html.
> 
> Ok?
> 
> --- changes.html.mp	2014-08-13 12:21:57.059610612 +0200
> +++ changes.html	2014-08-13 13:22:00.683597815 +0200
> @@ -16,11 +16,53 @@
>  
>  <h2 id="general">General Optimizer Improvements</h2>
>  
> +  <ul>
> +    <li>UndefinedBehaviorSanitizer gained a few new sanitization options:
> +    <ul>
> +      <li><code>-fsanitize=float-divide-by-zero</code>: detect floating-point
> +	   division by zero;</li>
> +      <li><code>-fsanitize=float-cast-overflow</code>: check that the result
> +	   of floating-point type to integer conversion does not overflow;</li>
> +      <li><code>-fsanitize=bounds</code>: enable instrumentation of array bounds
> +	  and detect out-of-bounds accesses;</li>
> +      <li><code>-fsanitize=alignment</code>: enable alignment checking, detect
> +	  various misaligned objects.</li>
> +    </ul>
> +    </li>
> +  </ul>
> +
>  <h2 id="languages">New Languages and Language specific improvements</h2>
>  
>  <!-- h3 id="ada">Ada</h3 -->
> -<!-- h3 id="c-family">C family</h3 -->
> -<!-- h3 id="c">C</h3-->
> +<h3 id="c-family">C family</h3>
> +
> +  <ul>
> +    <li>A new <code>-Wswitch-bool</code> option has been added for the C and C++
> +	compilers, which warns whenever a <code>switch</code> statement has an
> +	index of boolean type.</li>
> +    <li>A new <code>-Wlogical-not-parentheses</code> option has been added for the
> +	C and C++ compilers, which warns about logical not used on the left hand
> +	side operand of a comparison.</li>
> +    <li>A new <code>-Wsizeof-array-argument</code> option has been added for the
> +	C and C++ compilers, which warns when the <code>sizeof</code> operator is
> +	applied to a parameter that is declared as an array in a function definition.
> +  </ul>
> +
> +<h3 id="c">C</h3>
> +
> +  <ul>
> +    <li>A new <code>-Wc90-c99-compat</code> option has been added to warn
> +	about features not present in ISO C90, but present in ISO C99.</li>
> +    <li>It is possible to disable warnings about conversions between pointers
> +	that have incompatible types via a new warning option
> +	<code>-Wno-incompatible-pointer-types</code>; warnings about implicit
> +	incompatible integer to pointer and pointer to integer conversions via
> +	a new warning option <code>-Wno-int-conversion</code>; and warnings about
> +	qualifiers on pointers being discarded via a new warning option
> +	<code>-Wno-discarded-qualifiers</code>.</li>
> +    <li>The C front end now generates more precise caret diagnostics.</li>
> +  </ul>
> +
>  <!-- h3 id="cxx">C++</h3-->
>    <!-- h4 id="libstdcxx">Runtime Library (libstdc++)</h4-->
>  <h3 id="fortran">Fortran</h3>
> 
> 	Marek

	Marek

On Wed, 13 Aug 2014, Marek Polacek wrote:
> I've put together a few lines describing what I (except
> -fsanitize=alignment) implemented for GCC 5.
> It's the file wwwdocs/htdocs/gcc-5/changes.html.

Nice!

> +      <li><code>-fsanitize=float-cast-overflow</code>: check that the result
> +	   of floating-point type to integer conversion does not overflow;</li>

"conversions" (plural)?

> +    <li>A new <code>-Wswitch-bool</code> option has been added for the C and C++
> +	compilers, which warns whenever a <code>switch</code> statement has an
> +	index of boolean type.</li>

Here, and in the other cases, "A new option <code>..." might be less
ambigous -- someone might read this as an option for this command-line
option.  This is just a suggestion, feel free to ignore.

I would say "command-line option" instead of just option, though.

> +    <li>A new <code>-Wlogical-not-parentheses</code> option has been added for the
> +	C and C++ compilers, which warns about logical not used on the left hand
> +	side operand of a comparison.</li>

"logical not" in quotes, perhaps?  Otherwise this may be a bit hard to
parse.

> +    <li>A new <code>-Wsizeof-array-argument</code> option has been added for the
> +	C and C++ compilers, which warns when the <code>sizeof</code> operator is
> +	applied to a parameter that is declared as an array in a function definition.

"has been" instead of "is declard"?

> +    <li>It is possible to disable warnings about conversions between pointers
> +	that have incompatible types via a new warning option
> +	<code>-Wno-incompatible-pointer-types</code>; warnings about implicit
> +	incompatible integer to pointer and pointer to integer conversions via
> +	a new warning option <code>-Wno-int-conversion</code>; and warnings about
> +	qualifiers on pointers being discarded via a new warning option

Should we write "pointer-to-integer" and the like, here and in other
parts of the patch?  Probably best a question for Joseph (and if he
has approved code/document patches where that was not the case, than
the answer pretty likely is now. ;-)

Gerald