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Re: [C++ PATCH] warning about empty extern "C" structures
On Wed, 2006-05-17 at 10:48 -0700, Andrew Pinski wrote:
> On May 17, 2006, at 10:34 AM, Daniel Jacobowitz wrote:
> > - Using it in extern "C" in the GNU dialects is obviously broken,
> > since
> > it will be given the C++ layout, but the C version it is trying to
> > interface will be given the C layout, and they will not match.
> Why? it only changes the linkage of the structs/variables/functions
> and never the layout.
There is smthg I'm missing. If it transforms a zero size structure into
a non-zeros sized one, there is a modification in the layout. Otherwise,
the program would not crash !!!
A modified Roman program (first to correct errors and then to show the
device_t sizes from C and C++ code) gives:
Size in C: 1
Size in C++: 2
That is a layout difference....