Re: Unnamed unions

["Timothy J. Wood" <tjw at omnigroup dot com>]

   Maybe this is the issue...

   I'm building with the C compiler, not the C++ compiler (since all the 
files are .c files and since I need to access ObjC anyway).

   If I build with the C++ compiler, it does work, but if I do:

cc -Wall -O2 -ansi -pedantic /tmp/foo.c -o /tmp/foo

I get:

/tmp/foo.c:12: warning: ANSI C forbids member declarations with no 
members
/tmp/foo.c:12: warning: unnamed struct/union that defines no instances
/tmp/foo.c: In function `main':
/tmp/foo.c:20: structure has no member named `a'

   So, I guess I'll just replace these by hand.

   Thanks!


On Friday, February 16, 2001, at 04:15  PM, James Dennett wrote:

> "Timothy J. Wood" wrote:
>>
>>    I end up porting a lot of code that is built with VC++ and/or
>> Metrowerks to Mac OS X using gcc.  Apparently both of these compilers
>> support the following:
>>
>> struct {
>>    union {
>>         int a, b;
>>   };
>> } x;
>>
>> int main()
>> {
>>      x.a = 1;
>>      return 0;
>> }
>>
>
> I believe that this is Standard C++ (IIRC) and my g++ compiles it
> happily when I type g++ -ansi -pedantic -o union union.C
>
> Note that I'm using a pretty up-to-date g++ snapshot.
>
> Hope this helps.
>
>
> -- James Dennett.
>