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<div class="moz-cite-prefix">Adding a separate flag to control this
is probably fine. Not sure about the name fplan9-extensions; in
gcc, I think that includes some other extensions we don't
implement.<br>
<br>
-Eli<br>
<br>
On 7/30/2018 12:52 PM, Richard Smith wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOfiQqn29MTpcHcCeb0zavizPZ8nCekDGkf3egFjnZJrO-0YcQ@mail.gmail.com">
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<div dir="ltr">Would it make sense to add a -fplan9-extensions
flag, to enable support for this without enabling all the other
MS extensions that we support?</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Mon, 30 Jul 2018 at 11:53, Friedman, Eli via
cfe-dev <<a href="mailto:cfe-dev@lists.llvm.org"
moz-do-not-send="true">cfe-dev@lists.llvm.org</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">On 7/30/2018
9:08 AM, Frank Redeker via cfe-dev wrote:<br>
> Hello List,<br>
><br>
> Given the following piece of code.<br>
><br>
> typedef union {<br>
> struct {<br>
> unsigned char LOW;<br>
> unsigned char HIGH;<br>
> };<br>
> unsigned short SHORT; <br>
> } UNION;<br>
><br>
> typedef struct {<br>
> UNION; // <-- use of type only<br>
> union {<br>
> unsigned char FOO;<br>
> };<br>
> } STRUCT;<br>
><br>
> STRUCT Variable;<br>
><br>
> void Function () {<br>
> Variable.LOW = 1;<br>
> }<br>
><br>
><br>
> This code compiles without any error using gcc 7.2 (When
compiling with<br>
> -ansi -pedantic I get the warning "ISO C90 doesn't
support unnamed<br>
> structs/unions". If I add -std=c11 the warning
disappears)<br>
<br>
Declaring an anonymous union like that non-standard; you need
to pass <br>
-fms-extensions.<br>
<br>
-Eli<br>
<br>
-- <br>
Employee of Qualcomm Innovation Center, Inc.<br>
Qualcomm Innovation Center, Inc. is a member of Code Aurora
Forum, a Linux Foundation Collaborative Project<br>
<br>
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</blockquote>
</div>
</blockquote>
<p><br>
</p>
<pre class="moz-signature" cols="72">--
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project</pre>
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