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OS X - Development and Darwin Discussion and questions about development for Mac OS X.

Carbon, n00b problem :)

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Member Since: Mar 27, 2007
Posts: 3
jaysonturner is on a distinguished road
Mac Specs: MacBook 2Ghz Core2Duo

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Thought I'd have a bash at a bit of Carbon today, but Xcode keeps moaning. Ive made this simple program to print the current time.

#include <stdio.h>
#include <CoreFoundation/CoreFoundation.h>

int main (int argc, const char * argv[]) {
	CFAbsoluteTime time;
	time = CFAbsoluteTimeGetCurrent();
	printf("%d", time);
    return 0;
Now, with ZeroLink on, i get this error at runtime.

ZeroLink: unknown symbol '_CFAbsoluteTimeGetCurrent'
Test has exited due to signal 6 (SIGABRT).

But with ZeroLink off, i get

Undefined symbols:

at compile time...

I've obviously missed something, any help would be nice
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Member Since: Mar 20, 2007
Location: Grapevine, Tx
Posts: 22
musicforme is on a distinguished road
Mac Specs: Early 2008 Mac Pro - 500 GB HD - 6 GB Ram

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I've never programmed in this language, but have some experience in and Java.

I wonder if time = CFAbsoluteTimeGetCurrent() shouldn't be time = CFAbsoluteTime.GetCurrent()

Note the extra period between what is probably the Object class and the method.
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Member Since: Nov 25, 2005
Location: Nova Scotia
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Mac Specs: Intel Core solo Mac mini 1.5GHz, Headless Powerbook G4 500MHz

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Hey. CoreFoundation is not Object-Oriented, its procedural. It should go like this:

#import <Carbon/Carbon.h>

int main (int argc, const char * argv[])
printf("%d\n", (double)CFAbsoluteTimeGetCurrent());
return 0;

Originally Posted by bubba View Post
My wife's switching.... she just doesn't know it yet
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