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Re: preprocessor directive to determine OS?

On Sunday, August 31, 2003, at 04:34 PM, Ilya Maykov wrote:

> Hi all,
>
> I have a fairly simple question. I'm writing a C/C++ application and
> want to make it cross-platform, so it will include different modules
> for different operating systems. The first target system is OS X 10.2
> or higher, with an eventual port to Win32.


> Can someone tell me, what are the macros used by OS X to indicate the
> OS name and version? For example, to have system-specific code I would
> do something like this:

You can't tell the OS Version from a #define macro used at compile time
to determine a value at run-time. You could compile on 10.2 and in five
years be running on 11.5.


> #if defined MAC_OS_X
> // OS X specific code
> #elif defined WINDOWS
> //windows specific code
> #elif defined SOME_OTHER_OS
> //some other code

Take a look at "ConditionalMacros.h" (CarbonCore framework inside
CoreServices)

In particular things like...

TARGET_OS_MAC
TARGET_OS_WIN32

And so on.
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References: 
 >preprocessor directive to determine OS? (From: Ilya Maykov <email@hidden>)



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