CPP/GCC/CC all define _WIN32 by default under all the environment I ever worked on. (which is pretty extensive.)
By design, compilers running under Windows (be that Watcom, Borland or MCVC) must define _WINTVER, _WIN32 and M_IX86/M_ALPA/etc in-order to include the Winxxx.h files. (which are required to access any OS functions) So yes, these are compiler defined macros that can be relayed upon. Gilboa On Thu, 2003-07-03 at 21:08, Oleg Goldshmidt wrote: > Gilboa Davara <[EMAIL PROTECTED]> writes: > > > Better yet: > > > > #ifdef unix > > > > // UNIX/Linux/*BSD. > > > > #endif > > > > #ifdef _WIN32 > > > > // Window stuff > > > > #endif > > > > Both symbols are auto defined by the compiler. > > What is "the compiler"? How can you be sure that 6 months from now > someone in New Zealand will be using "the compiler"? > > There is nothing I know of that will guarantee existence of "unix" or > "_WIN32". Even worse, what about the cases where Solaris, AIX, HPUX, > Linux, DG/UX, and assorted BSDs all work differently, what good is > "unix" then? If a compiler defines something like that, it is most > likely for its own internal use, and to comply with the system > facilities, *not* to be exported into client code. > > To the OP: > > Create your own compilation environment, call your CPP macros whatever > you want, in your Makefile or configuration files define the proper > flags depending on the output of things like uname -s etc. In short, > do whatever is needed but do not rely on things that *a* compiler > defines automatically. > > Finally, if you suspect that something or somebody is #undefing or > #defining your macros without you knowing it, try to make the compiler > #as verbose as possible - maybe there will be a clue there. Often you > #will see what it silently #defines or #undefs on the command line then. ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
