<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - transferring the warning on designated_init on a non-struct to an error?"
href="https://bugs.llvm.org/show_bug.cgi?id=42223">42223</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>transferring the warning on designated_init on a non-struct to an error?
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>zhonghao@pku.org.cn
</td>
</tr>
<tr>
<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
</td>
</tr></table>
<p>
<div>
<pre>My clang is 9.0.0, and the code is:
struct S {
int a;
union {
int b;
int c;
};
} __attribute__((designated_init));
static struct S s = {
.a = 0,
.b = 0,
};
union U {
int a;
struct {
int b;
int c;
} __attribute__((designated_init));
};
static union U u = {
.b = 0,
.c = 0,
};
clang produces the warnings:
<source>:7:18: warning: unknown attribute 'designated_init' ignored
[-Wunknown-attributes]
} __attribute__((designated_init));
^
<source>:19:19: warning: unknown attribute 'designated_init' ignored
[-Wunknown-attributes]
} __attribute__((designated_init));
^
2 warnings generated.
Compiler returned: 0
Meanwhile, gcc rejects it:
<source>:25:1: error: too many initializers for 'U'
25 | };
| ^
Compiler returned: 1
The code comes from a gcc bug reprt:
<a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59855">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59855</a>
Some discussions seem to be useful.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>