Re: [Patch,wwwdocs] 4.5 changes: MPC and Fortran

[Tobias Burnus <burnus at net-b dot de>]

On Mon, Jun 08, 2009 at 09:01:00PM +0200, Tobias Burnus wrote:
> I updated gcc-4.5/changes.html with the items from the
> news section of the gfortran wiki for MPC and Fortran.

Thanks for all the suggestions. I have now checked in the
patch, but I am still open for suggestions:

http://gcc.gnu.org/gcc-4.5/changes.html

Tobias

Index: changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.5/changes.html,v
retrieving revision 1.15
retrieving revision 1.17
diff -r1.15 -r1.17
42a43,49
>     <li>The <a href="http://www.multiprecision.org/";>Multiple Precision
>     Complex Library</a> (MPC) is now used if found at configure time.
>     This allows GCC to evaluate calls to complex built-in math functions
>     having constant arguments at compile-time and replace them with their
>     mathematically equivalent results. Some complex functions were
>     supported before; those are used as fall back if MPC is not used.</li>
> 
90a98,175
>   <ul>
>     <li>The <code>COMMON</code> default padding has been changed &ndash;
>     instead of adding the padding before a variable it is now added
>     afterwards, which increases the compatibility with other vendors
>     and helps to obtain the correct output in some cases. Cf. also the
>     <code>-falign-commons</code> flag (<a href="../gcc-4.4/changes.html">added
>     in 4.4</a>).</li>
> 
>     <li>The <code>-finit-real=</code> flag now also supports the value
>     <code>snan</code> for signalling not-a-number; to be effective,
>     one additionally needs to enable trapping (e.g. via
>     <code>-ffpe-trap=</code>). Note: Compile-time optimizations can
>     turn a signalling NaN into a quiet one.</li>
> 
>     <li>The new flag <code>-fcheck=</code> has been added with the
>     options <code>bounds</code>, <code>array-temps</code>,
>     <code>do</code>, and <code>recursive</code>. The
>     <code>bounds</code> and <code>array-temps</code> options are
>     equivalent to <code>-fbounds-check</code> and
>     <code>-fcheck-array-temporaries</code>. The <code>do</code>
>     option checks for invalid modification of loop iteration variables,
>     and the <code>recursive</code> option tests for recursive calls
>     to subroutines/functions which are not marked as recursive. Using
>     <code>-fcheck=all</code> enables all these run-time checks.</li>
> 
>     <li>The run-time checking <code>-fcheck=bounds</code> now warns
>     about invalid string lengths of character dummy arguments. Additionally,
>     more compile-time checks have been added.</li>
> 
>     <li>GNU Fortran no longer links against <code>libgfortranbegin</code>.
>     As before, <code>MAIN__</code> (assembler symbol name) is the actual
>     Fortran main program, which is invoked by the <code>main</code> function.
>     However, <code>main</code> is now generated and put in the same object
>     file as <code>MAIN__</code>. For the time being,
>     <code>libgfortranbegin</code> still exists for backward
>     compatibility. For details see the new <a
>     href="http://gcc.gnu.org/onlinedocs/gfortran/Mixed_002dLanguage-Programming.html";>Mixed-Language
>     Programming</a> chapter in the manual.</li>
> 
>     <li>The I/O library was restructured for performance and cleaner
>     code.</li>
> 
>     <li>Array assignments and <code>WHERE</code> are now run in parallel when
>     OpenMP's <code>WORKSHARE</code> is used.</li>
> 
>     <li>The experimental flag <code>-fwhole-file</code> was added. The flag
>     allows whole-file checking of procedure arguments and allows for better
>     optimizations. It can also be used with <code>-fwhole-program</code>,
>     which is now also supported in gfortran.</li>
> 
>     <li>More Fortran 2003 and Fortran 2008 mathematical functions can
>     now be used as initialization expressions.</li>
> 
>     <li>Fortran 2003 support has been extended:
>       <ul>
>        <li>Procedure-pointer function results and procedure-pointer
>        components with the NOPASS attribute,</li>
>        <li><code>DEFERRED</code> type-bound procedures, and</li>
>        <li>the ERRMSG= argument of the ALLOCATE and DEALLOCATE statements
>        have been implemented.</li>
>        <li>The <code>INT_FAST{8,16,32,64,128}_T</code> kind type parameters
>        of the intrinsic module <code>ISO_C_BINDING</code> are now supported.
>        </li>
>       </ul>
>     </li>
> 
>     <li>Fortran 2008 support has been extended:
>       <ul>
>         <li>The <code>OPEN</code> statement now supports the
>         <code>NEWUNIT=</code> option, which returns a unique file unit,
>         thus preventing inadvertent use of the same unit in different parts
>         of the program.</li>
>         <li>The <code>INT{8,16,32}</code> and <code>REAL{32,64,128}</code>
>         kind type parameters of the intrinsic module
>         <code>ISO_FORTRAN_ENV</code> are now supported.</li>
>       </ul>
>     </li>
>   </ul>