Mailing Lists: Apple Mailing Lists
Image of Mac OS face in stamp
Cmath and math.h Changes in Xcode 2.4
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Cmath and math.h Changes in Xcode 2.4



Was there some change to Xcode (and the entire tool chain) in Xcode 2.4 that
would affect the isnan(x) function?

I have now come across two open source packages that get hung up on
"isnan(x) is undeclared in this context"  type errors.

The projects are OpenSceneGraph (www.openscenegraph.net) and ITK
(www.itk.org).

In ITK's case I had to change a #define to look like the following:

#if defined(__APPLE__)
#if (__GNUC__ >= 4)
  #include <cmath>
  #define isnan(x) std::isnan(x)
#else
  #include <math.h>
  #define isnan(x) __isnand((double)x)
#endif
#endif

Where as it used to be just:
#if defined(__APPLE__)
  #include <math.h>
  #define isnan(x) __isnand((double)x)
#endif

 Just curious....

--
Mike Jackson
imikejackson <at> gmail <dot> com


 _______________________________________________
Do not post admin requests to the list. They will be ignored.
Xcode-users mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:

This email sent to email@hidden



Visit the Apple Store online or at retail locations.
1-800-MY-APPLE

Contact Apple | Terms of Use | Privacy Policy

Copyright © 2011 Apple Inc. All rights reserved.