I have done the same thing myself, using size of INT instead of P which is of course following the exact same logic. After attempting several strategies I found this one to be the safest way to detect 32/64bit systems, so I recommend using SIZEOF as well.
Cheers, Yngve On Sunday 13 February 2011 08:00:41 PM Ryan Pavlik wrote: > Yep CMAKE_SIZEOF_VOID_P will be 4 if you've chosen a generator like "Visual > Studio 9.0 2008", and 8 if you've chosen "Visual Studio 9.0 2008 Win64" > > Ryan > > On Sat, Feb 12, 2011 at 11:41 AM, Dominik Szczerba > <[email protected]>wrote: > > > Quite right. > > > > So you claim that on Windows CMAKE_SIZEOF_VOID will tell me the > > *target* build system, not the physical one, while it will mach > > CMAKE_SYSTEM_PROCESSOR if the both are the same? > > > > Many thanks for the clarification. > > > > Dominik > > > > On Sat, Feb 12, 2011 at 6:34 PM, Ryan Pavlik <[email protected]> wrote: > > > CMAKE_SIZEOF_VOID_P will tell you the difference between target > > bit-widths: > > > 8 (for 64 bit) vs 4 (for 32 bit) - remember that just because you're > > running > > > on a 64-bit system doesn't mean you're compiling a 64-bit binary. > > > Ryan > > > > > > On Sat, Feb 12, 2011 at 11:29 AM, Dominik Szczerba <[email protected] > > > > > > wrote: > > >> > > >> OK, got it experimentally. You have > > >> > > >> CMAKE_SYSTEM_PROCESSOR > > >> > > >> But wait, is the description below correct? > > >> > > >> http://www.cmake.org/Wiki/CMake_Useful_Variables > > >> > > >> Opposed to the explanations there, which I saw, but took as not what I > > >> need, on my systems it amounts to i686 and x86_64, exactly what I > > >> need. > > >> > > >> Dominik > > >> > > >> On Sat, Feb 12, 2011 at 6:19 PM, Dominik Szczerba <[email protected] > > > > > >> wrote: > > >> > Hi, > > >> > > > >> > I can't really find a clear solution in google: how would one go about > > >> > detecting if the system is 32 or 64 bit? There are UNIX, WIN32 etc. > > >> > flags, but nothing really for the architecture. > > >> > > > >> > Thanks a lot, > > >> > Dominik > > >> > > > >> _______________________________________________ > > >> Powered by www.kitware.com > > >> > > >> Visit other Kitware open-source projects at > > >> http://www.kitware.com/opensource/opensource.html > > >> > > >> Please keep messages on-topic and check the CMake FAQ at: > > >> http://www.cmake.org/Wiki/CMake_FAQ > > >> > > >> Follow this link to subscribe/unsubscribe: > > >> http://www.cmake.org/mailman/listinfo/cmake > > > > > > > > > > > > -- > > > Ryan Pavlik > > > HCI Graduate Student > > > Virtual Reality Applications Center > > > Iowa State University > > > > > > [email protected] > > > http://academic.cleardefinition.com > > > Internal VRAC/HCI Site: http://tinyurl.com/rpavlik > > > > > > > > > _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
