-----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of Tim Prince Sent: Tuesday 18 May 2010 13:55 To: gcc-help@xxxxxxxxxxx Subject: Re: SIZEOF_LONG 4 instead of 8 in 64-bits On 5/18/2010 10:50 AM, Ian Lance Taylor wrote: > Kraiser<pietiatibia1@xxxxxxxxx> writes: > > >> I need to use #define __SIZEOF_LONG__ 4 instead of #define __SIZEOF_LONG__ 8 >> in amd64 so my program will not double the memory usage how Can i do so? >> using debian and gcc 4.4.4 >> > No, there is no support for that. Sorry. > > Perhaps you could compile with -Dlong=int. Wouldn't work if you ever > use the long long type, though. > > Ian > or correct your program to use int32_t if that is your intention -- Tim Prince I have not been following this discussion since the beginning and so I don't know if it is applicable here but I use a little template metaprogram to establish an alias for an integer with a size equal to machine address width when I need such a thing. It comes out a bit like size_t or ssize_t without the need to cast. It would be just as easy to do the same for a 32-bit integer. The advantage of this approach is that you are never dependent on things like int_32 or variants thereof which may or may not be defined for any particular platform. So long as one of the C/C++ integer types has the desired size, you get what you want.
