anonymous struct problems

[llewelly@xmission.com]

Ben Guthro <bguthro@sequelimaging.com> writes:

> I'm running into a problem that I did not have in previous versions of
> gcc
> (I'm running 3.3.2-1 - shipped with Redhat Fedora Core1)
> 
> 
> previous versions of gcc only gave me warnings on this code:
> 
> typedef struct DigitalMonitorPhotometry
> {
> 	union
> 	{
> 		struct
> 		{
> 			DMC Brightness;
> 			DMC Contrast;
> 			DMC RedGain;
> 			DMC GreenGain;
> 			DMC BlueGain;
> 			DMC RedBias;
> 			DMC GreenBias;
> 			DMC BlueBias;
> 		};
> 		struct
> 		{
> 			DMC dmp[8];
> 		};
> 	};
> }DM_PHOTOMETRYSETUP;
> 
> 
> However, now I get:
> error: ISO C++ prohibits anonymous structs
> 
> This used to be a worning under previous gcc versions.

If you really need this feature, try adding -fms-extensions to your
    CFLAGS. fsf gcc 3.3.3 will compile your code with -fms-extensions
    and 'typedef char DMC;', on i386 freebsd 5.2p2 .

See http://xrl.us/budy and search for '-fms-extensions'.