attribute((dllimport)) problems with egcs

Mon Feb 15 12:20:00 GMT 1999

Hello Mumit,
 Egcs 1.1.1 has problems with dllimport attribute, inherent from
1.1. Here's sample code to show them:
--------
typedef struct _object {
 int ob_refcnt; struct _typeobject *ob_type;
} PyObject;
extern __attribute__((dllimport)) PyObject _Py_NoneStruct ; 
static PyObject *
parse_and_bind(PyObject *self,PyObject *args)
{
 return &_Py_NoneStruct;
} 
---------
 Both C and C++ frontends have problems, C++ fatal ones.
 When that code compiled in C mode, following warning is issued:
---
a.c: In function `parse_and_bind':
a.c:10: warning: return from incompatible pointer type 
--
 Of course, it's not there without __attribute__((dllimport)).
 When compiled in C++ mode, it just crashes. Further
investigation by feeding code directly to cc1plus shows that crash
occurs not on declaring _Py_NoneStruct, but on referencing it
(compiler have time to print "struct PyObject * parse_and_bind(struct
PyObject *, struct PyObject *)"). Then, it seems that referencing
method plays role too: for example, returning structure itself doesn't
cause problems. Crash itself due to null pointer dereference at 0x00438b5f.
Best regards,
 Paul mailto:paul-ml@is.lg.ua

__attribute__((dllimport)) problems with egcs

attribute((dllimport)) problems with egcs