[GCC-XML] Bug with empty structure

[Brad King]

Thomas Heller wrote:
> Brad King <brad.king at kitware.com> writes:
> 
> 
>>Thomas Heller wrote:
>>
>>>On this structure (I know it's silly, but it seems to appear in real
>>>world header files)
>>>typedef struct {
>>>// OBSOLETE
>>>} Y;
>>>gccxml generates this:
>>><?xml version="1.0"?>
>>><GCC_XML cvs_revision="1.96">
>>>  <Namespace id="_1" name="::" members="_3 " mangled="_Z2::"/>
>>>  <Namespace id="_2" name="std" context="_1" members="" mangled="_Z3std"/>
>>>  <Struct id="_3" name="Y" context="_1" mangled="1Y" location="f0:3"
>>>  file="f0" line="3" size="8" align="8" members="_4 _5 " bases=""/>
>>>                     ^^^^^^^^
>>>size="8" is a bug, isn't it?
>>
>>That's the size that GCC's parser is giving to the xml dump code.  C
>>and C++ structures cannot be zero size because each object is supposed
>>to have a unique address.  It is up to the compiler to choose a size
>>for empty objects.  For some reason GCC is choosing size 8.
> 
> 
> Is that really true?  gcc on my suse system, when compiling a program
> which prints sizeof(Y) with the above definition and running it says
> sizeof(Y) = 0, which is what I would expect.

Is that compiling a C program or a C++ program?

-Brad