[Rlib-devel] Re: GCC4 warning fixes part4

[Zoltan B. <zb...@du...>]

Zoltan Boszormenyi =EDrta:
> Sorry, it went to the rlib-users list.

And now with the attachment. :-(

>=20
> Zoltan Boszormenyi =EDrta:
>=20
>> Hi,
>>
>> here's the next part. Changelog:
>>
>> ***********************************************************
>> Silence warnings in datasource.c. The original code gave these
>> kinds of warnings on GCC4:
>> warning: ISO C forbids conversion of function pointer to object=20
>> pointer type
>> warning: ISO C forbids initialization between function pointer and=20
>> 'void *'
>> warning: ISO C forbids assignment between function pointer and 'void *=
'
>> The above warnings sound serious but on the other hand, explicitly
>> casting the address of a function pointer to a (gpointer *) gave this
>> warning on older GCCs:
>> warning: dereferencing type-punned pointer will break strict-aliasing=20
>> rules
>> Aliasing function pointers to gpointer using unions solves this, using
>>   union {
>>     gpointer ptr;
>>     void (*function)(void);
>>   }
>> allows the assignment to the gpointer and calling function() without
>> warnings.
>> ***********************************************************
>>
>> Best regards,
>> Zolt=E1n B=F6sz=F6rm=E9nyi
>=20
>=20
>=20