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RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.9/changes.html,v
retrieving revision 1.4
@@ -22,9 +22,7 @@
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<h2>New Languages and Language specific improvements</h2>
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<h3>Ada</h3>
@@ -35,7 +33,9 @@
<ul>
<li>Support for colorizing diagnostics emitted by GCC has been added.
- The <code>-fdiagnostics-color=auto</code> will enable it when
+ The <code><a
+ href="http://gcc.gnu.org/onlinedocs/gcc/Language-Independent-Options.html#index-fdiagnostics_002dcolor-239"
+ >-fdiagnostics-color=auto</a></code> will enable it when
outputting to terminals, <code>-fdiagnostics-color=always</code>
unconditionally. The <code>GCC_COLORS</code> environment variable
can be used to customize the colors or disable coloring.<br/>
@@ -81,6 +81,26 @@
has been removed. (<code>-fwhole-file</code> is the default since
GCC 4.6.) <code>-fwhole-file</code>/<code>-fno-whole-file</code>
continue to be accepted but do not influence the code generation.</li>
+ <li>The new <code>NO_ARG_CHECK</code> attribute of the <a
+ href="http://gcc.gnu.org/onlinedocs/gfortran/GNU-Fortran-Compiler-Directives.html"
+ ><code>!GCC$</code> directive</a> can be used to disable the
+ type-kind-rank (TKR) argument check for a dummy argument. The feature
+ is similar to ISO/IEC TS 29133:2012's <code>TYPE(*)</code>, except that
+ it additionally also disables the rank check. Variables with
+ <code>NO_ARG_CHECK</code> have to be dummy arguments and may only be
+ used as argument to <code>ISO_C_BINDING</code>'s <code>C_LOC</code>
+ and as actual argument to another <code>NO_ARG_CHECK</code> dummy
+ argument; also the other constraints of <code>TYPE(*)</code> apply.
+ The dummy arguments should be declared as scalar or assumed-size
+ variable of type <code>type(*)</code> (recommended) – or of
+ type <code>integer</code>, <code>real</code>, <code>complex</code>
+ or <code>logical</code>. With <code>NO_ARG_CHECK</code>, a pointer
+ to the data without further type or shape information is passed,
+ similar to C's <code>void*</code>. Note that also TS 29113's
+ <code>type(*),dimension(..)</code> accepts arguments of any type and
+ rank; contrary to <code>NO_ARG_CHECK</code> assumed-rank arguments
+ pass an array descriptor which contains the array shape and stride
+ of the argument.</li>
</ul>
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