c99status.html adjustments
Joseph S. Myers
jsm28@cam.ac.uk
Mon Jul 24 03:06:00 GMT 2000
This patch adjusts c99status.html for alignment with the printed C99
standard, and makes some other minor changes to it.
--- c99status.html Tue Jul 18 20:38:28 2000
+++ c99status-new.html Mon Jul 24 10:00:19 2000
@@ -7,12 +7,14 @@
<body>
<h1>Status of C99 features in GCC</h1>
-<p>This table is based on the list in the foreword to the FDIS plus
-N894.</p>
+<p>This table is based on the list in the foreword to the printed
+standard ISO/IEC 9899:1999 (E).</p>
<p>Where "Library Issue" is listed in conjunction with some other
status, this means that some compiler support is needed for the
-library support, or desirable in conjunction with it.</p>
+library support, or desirable in conjunction with it. Note that the
+headers required of conforming freestanding implementations (clause 4
+paragraph 6) do not count as library issues.</p>
<p>See below the table for further notes on some issues.
@@ -24,12 +26,15 @@
<th>Missing</th>
</tr>
-<tr><td><em>digraphs and iso646.h</em></td>
+<tr><td><em>restricted character set support via digraphs and
+ <br><code><iso646.h></code> (originally specified in AMD1)</em></td>
<td></td>
<td>Done</td><td></td><td></td>
</tr>
-<tr><td><em>wchar.h and wctype.h</em></td>
+<tr><td><em>wide character library support in
+ <code><wchar.h></code><br>and <code><wctype.h></code>
+ (originally specified in AMD1)</em></td>
<td>Library Issue</td>
<td></td><td></td><td>Missing</td>
</tr>
@@ -53,45 +58,45 @@
<td></td><td></td><td></td><td>Missing</td>
</tr>
-<tr><td><em>static and type qualifiers in parameter array declarators</em></td>
+<tr><td><em><code>static</code> and type qualifiers<br>in parameter array declarators</em></td>
<td></td><td></td><td></td><td>Missing</td>
</tr>
-<tr><td><em>complex</em></td>
+<tr><td><em>complex (and imaginary) support in <code><complex.h></code></em></td>
<td></td><td></td><td>Broken</td>
<td></td>
</tr>
-<tr><td><em>tgmath.h</em></td>
+<tr><td><em>type-generic math macros in <code><tgmath.h></code></em></td>
<td>Library Issue</td>
<td>Done</td><td></td><td></td>
</tr>
-<tr><td><em>long long</em></td>
+<tr><td><em>the <code>long long int</code> type and library functions</em></td>
<td></td><td>Done</td>
<td></td><td></td>
</tr>
-<tr><td><em>increased limits</em></td>
+<tr><td><em>increased minimum translation limits</em></td>
<td></td><td>Done</td>
<td></td><td></td>
</tr>
-<tr><td><em>additional floating-point characteristics in float.h</em></td>
+<tr><td><em>additional floating-point characteristics<br>in <code><float.h></code></em></td>
<td></td><td></td>
<td></td><td>Missing</td>
</tr>
-<tr><td><em>removed implicit int</em></td>
+<tr><td><em>remove implicit <code>int</code></em></td>
<td></td><td>Done</td>
<td></td><td></td>
</tr>
-<tr><td><em>reliable integer divisions</em></td>
+<tr><td><em>reliable integer division</em></td>
<td></td><td>Done</td><td></td><td></td>
</tr>
-<tr><td><em>UCS names</em></td>
+<tr><td><em>universal character names (<code>\u</code> and <code>\U</code>)</em></td>
<td></td><td></td><td></td><td>Missing</td>
</tr>
@@ -99,7 +104,9 @@
<td></td><td></td><td></td><td>Missing</td>
</tr>
-<tr><td><em>binary floating point literals +<br>printf support</em></td>
+<tr><td><em>hexadecimal floating-point constants and
+ <code>%a</code><br> and <code>%A</code>
+ <code>printf</code>/<code>scanf</code> conversion specifiers</em></td>
<td>Library Issue</td><td>Done</td>
<td></td><td></td>
</tr>
@@ -114,17 +121,17 @@
<td></td>
</tr>
-<tr><td><em>//comments</em></td>
+<tr><td><em><code>//</code> comments</em></td>
<td></td><td>Done</td>
<td></td><td></td>
</tr>
-<tr><td><em>inttypes.h</em></td>
+<tr><td><em>library functions in <code><inttypes.h></code></em></td>
<td>Library Issue</td>
<td></td><td></td><td></td>
</tr>
-<tr><td><em>stdint.h</em></td>
+<tr><td><em>extended integer types in <code><stdint.h></code></em></td>
<td></td>
<td></td><td></td><td>Missing</td>
</tr>
@@ -134,7 +141,7 @@
<td></td><td></td>
</tr>
-<tr><td><em>preprocessor arithmetic<br>done in intmax_t/uintmax_t</em></td>
+<tr><td><em>preprocessor arithmetic<br>done in <code>intmax_t</code>/<code>uintmax_t</code></em></td>
<td></td><td></td><td>Broken</td><td></td>
</tr>
@@ -142,7 +149,7 @@
<td></td><td></td><td></td><td>Missing</td>
</tr>
-<tr><td><em>new block scopes for selection and iteration statements</em></td>
+<tr><td><em>new block scopes for selection<br>and iteration statements</em></td>
<td></td><td></td><td></td><td>Missing</td>
</tr>
@@ -154,36 +161,37 @@
<td></td><td></td><td></td><td>Missing</td>
</tr>
-<tr><td><em>vararg macros</em></td>
+<tr><td><em>macros with a variable number of arguments</em></td>
<td></td><td>Done</td>
<td></td><td></td>
</tr>
-<tr><td><em>vscanf</em></td>
+<tr><td><em>the <code>vscanf</code> family of functions
+ in<br><code><stdio.h></code> and <code><wchar.h></code></em></td>
<td>Library Issue</td>
<td></td><td></td><td>Missing</td>
</tr>
-<tr><td><em>additional math library functions</em></td>
+<tr><td><em>additional math library functions in <code><math.h></code></em></td>
<td>Library Issue</td>
<td></td><td></td><td>Missing</td>
</tr>
-<tr><td><em>floating-point environment access<br>in fenv.h</em></td>
+<tr><td><em>floating-point environment access<br>in <code><fenv.h></code></em></td>
<td>Library Issue</td>
<td></td><td></td><td></td>
</tr>
-<tr><td><em>IEC 60559</em></td>
+<tr><td><em>IEC 60559 (also known as<br>IEC 559 or IEEE arithmetic) support</em></td>
<td></td><td></td><td>Broken</td><td></td>
</tr>
-<tr><td><em>trailing comma allowed in enum declaration</em></td>
+<tr><td><em>trailing comma allowed in <code>enum</code> declaration</em></td>
<td></td><td>Done</td>
<td></td><td></td>
</tr>
-<tr><td><em>%lf conversion specifier<br>allowed in printf</em></td>
+<tr><td><em><code>%lf</code> conversion specifier<br>allowed in <code>printf</code></em></td>
<td>Library Issue</td><td></td><td></td><td>Missing</td>
</tr>
@@ -192,12 +200,12 @@
<td></td>
</tr>
-<tr><td><em>snprintf</em></td>
+<tr><td><em>the <code>snprintf</code> family of functions in <code><stdio.h></code></em></td>
<td>Library Issue</td>
<td></td><td></td><td>Missing</td>
</tr>
-<tr><td><em>boolean type in stdbool.h</em></td>
+<tr><td><em>boolean type in <code><stdbool.h></code></em></td>
<td></td>
<td></td><td>Broken</td><td></td>
</tr>
@@ -214,7 +222,11 @@
<td></td><td>Done</td><td></td><td></td>
</tr>
-<tr><td><em>_Pragma preprocessing operator</em></td>
+<tr><td><em>additional predefined macro names</em></td>
+ <td></td><td></td><td></td><td>Missing</td>
+</tr>
+
+<tr><td><em><code>_Pragma</code> preprocessing operator</em></td>
<td></td><td></td><td></td><td>Missing</td>
</tr>
@@ -222,20 +234,20 @@
<td></td><td></td><td></td><td>Missing</td>
</tr>
-<tr><td><em>__func__ predefined identifier</em></td>
+<tr><td><em><code>__func__</code> predefined identifier</em></td>
<td></td><td>Done</td>
<td></td><td></td>
</tr>
-<tr><td><em>va_copy macro</em></td>
+<tr><td><em><code>va_copy</code> macro</em></td>
<td></td><td>Done</td><td></td><td></td>
</tr>
-<tr><td><em>additional strftime conversion specifiers</em></td>
+<tr><td><em>additional <code>strftime</code> conversion specifiers</em></td>
<td>Library Issue</td><td></td><td></td><td>Missing</td>
</tr>
-<tr><td><em>deprecate ungetc at the<br>beginning of a binary file</em></td>
+<tr><td><em>deprecate <code>ungetc</code> at the<br>beginning of a binary file</em></td>
<td>Library Issue</td>
<td></td><td></td><td></td>
</tr>
@@ -245,7 +257,7 @@
<td></td><td></td>
</tr>
-<tr><td><em>conversion of non-lvalue array to pointer</em></td>
+<tr><td><em>conversion of array to pointer not limited to lvalues</em></td>
<td></td><td></td>
<td></td><td>Missing</td>
</tr>
@@ -260,7 +272,8 @@
<td>Broken</td><td></td>
</tr>
-<tr><td><em>return without expression not permitted in<br>function that returns a value</em></td>
+<tr><td><em><code>return</code> without expression not permitted
+ in<br>function that returns a value (and vice versa)</em></td>
<td></td><td>Done</td>
<td></td><td></td>
</tr>
@@ -317,12 +330,25 @@
<li>complex numbers support is currently broken (how?)
-<li>C99 inline implies static
+<li>C99 <code>inline</code> functions do not generate an external
+definition if declared without <code>extern</code>, but do if declared
+with <code>extern</code>, the opposite of GCC's handling of
+<code>inline</code> and <code>extern inline</code>. This will
+probably require existing glibc headers to be fixincluded.
<li>VLA (variable length arrays) differ from the GCC extension (what
difference)?
<li>compound array initialization does not support variables
+
+<li>The list above differs from that in the C99 standard as follows:
+"LIA compatibility annex" is removed, since it refers to C99's
+conformance to another standard rather than something for C
+implementations to do. The <code><stdint.h></code> and
+<code><inttypes.h></code> entries have been separated, but are a
+single entry in C99. The foreword to C99 wrongly refers to the
+<code>VA_COPY</code> macro, but in the normative text (7.15.1.2) it is
+<code>va_copy</code>, so that correction has been made to the list.
</ul>
--
Joseph S. Myers
jsm28@cam.ac.uk
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