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Editorial Team
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Asked: 2026-06-11T20:36:02+00:00

I want some code tobe compiled under 10.6 and below but not 10.7 and

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I want some code tobe compiled under 10.6 and below but not 10.7 and above.

For example:

#ifdef current version is MAC_OS_X_VERSION_10_6 or below

// do this

elif current version is MAC_OS_X_VERSION_10_7 or above 

//do that

#endif

Can someone help me ge proper macros for it? I looked into AvailabilityMacros.h but was not able to figure out proper ifdef.

I have a dynamic library, and it cannot be loaded under 10.7 and above but loads properly under 10.6. This is due to private symbol _CGContextAppendPath. I want to keep it using under 10.6 and below but avoid its use in 10.7 and below. This is because _CGContextAppendPath symbol is not present on 10.7 and above.

I used,

SInt32 version = 0;
Gestalt( gestaltSystemVersion, &version );

bool lionabove = ( version >= 0x1070 );

did not work.

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1 Answer

  1. Editorial Team

    For Objective C, the go-to route would be to check the availability of specific APIs via e.g. [object respondsToSelector:].

    For the C library you are using, weak-link to CoreGraphics.framework (so the loading doesn’t fail when some functions aren’t present) and check for availability of the function in question via &_CGContextAppendPath != NULL.

    Details in http://developer.apple.com/library/mac/#documentation/DeveloperTools/Conceptual/cross_development/Configuring/configuring.html#//apple_ref/doc/uid/10000163i-CH1-107837 and http://developer.apple.com/library/mac/#documentation/DeveloperTools/Conceptual/cross_development/Using/using.html#//apple_ref/doc/uid/20002000-1114537-BABHHJBC.

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