Re: -fshort-wchar in g++ (wstring & wchar_t)

[Paul Pluzhnikov]

"Vinu" <vinuwarrier@yahoo.com> writes:

> I compiled my program with -fshort-wchar option

Not a smart thing to do. 'info gcc' has this to say about it:

     *Warning:* the `-fshort-wchar' switch causes GCC to generate code
     that is not binary compatible with code generated without that
     switch.  Use it to conform to a non-default application binary
     interface.

IOW, you have to make sure that *all* code that you link against is
compiled with the same -fshort-wchart setting.

> str.append(Node);

In the case above, you are using 
  std::basic_string<wchar_t, ... >::append(wchar_t const*)
from libstdc++.so which (I am guessing) you did not recompile with
-fshort-wchart, and which therefore uses different ABI.

In doing so, you create the bug you've observed (and possibly many
more bugs you didn't observe yet).

Don't use switches which change ABI, unless you understand what
you are doing.

Cheers,
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