On Mon, Feb 9, 2009 at 10:04 AM, Sean McBride <s...@rogue-research.com> wrote: > On 2/8/09 11:14 PM, Clark Cox said: > >>> A somehow related question: >>> How does one find out, in which mode (32 vs. 64 bit) an app is running? >> >>#ifdef __LP64__ > > Apple's headers inconsistently use #if and #ifdef.
Because #if and #ifdef will both give the proper result in this instance (i.e. the GCC compiler either defines __LP64__ to true, or it doesn't define it at all), they are interchangeable. > I recommend: > > #if defined (__LP64__) && __LP64__ FYI, there is no functional difference between: #if defined (SOMEMACRO) && SOMEMACRO and #if SOMEMACRO That is, the preprocessor treats any undefined identifier in an '#if' or '#elif" as if it were defined to be zero. > which will also not warn with -Wundef. My original #ifdef won't trigger this warning either, therefore it is the best of all options (i.e. it's concise, doesn't trigger warnings, and provides the correct result). -- Clark S. Cox III clarkc...@gmail.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
