Re: #define not working
Re: #define not working
- Subject: Re: #define not working
- From: Tommy Nordgren <email@hidden>
- Date: Sat, 1 Oct 2005 23:43:18 +0200
Oct 1, 2005 kl. 11:07 PM skrev Stéphane Sudre:
On samedi, octobre 1, 2005, at 11:06 PM, Alexander Hartner wrote:
I have added the following section all over my code to use during
debugging:
#ifdef DEBUG_LOG
NSLog(@"Freeing memory for keychain: (0=Success) %d \n",sec);
#endif
The idea is that I can switch debug information on and off by
either including :
#define DEBUG_LOG
#define INFO_LOG
For some reason these instructions are ignored and I never see any
message on the output. When I remove the #ifdef ... #endif block
and leave the NSLog statement the message is printed correctly.
Any suggestion why the ifdef / define is not processed ? The
application is a Cocoa Command Line Tool, if that makes a difference.
Try:
#define DEBUG_LOG 1
This should not make any difference. The #ifdef only tests if a
symbol is defined, not if the expansion is nonempty.
I've tested with the following program stub:
#import <Foundation/Foundation.h>
int main (int argc, const char * argv[]) {
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
// insert code here...
NSLog(@"Hello, World!");
#define DEBUGLOG1
#define DEBUGLOG2 1
#ifdef DEBUGLOG1
NSLog(@"DEBUGLOG1 defined");
#endif
#ifdef DEBUGLOG2
NSLog(@"DEBUGLOG2 defined");
#endif
[pool release];
return 0;
}
The output is:
2005-10-01 23:41:49.312 Testifdef[11973] Hello, World!
2005-10-01 23:41:49.314 Testifdef[11973] DEBUGLOG1 defined
2005-10-01 23:41:49.314 Testifdef[11973] DEBUGLOG2 defined
The cause of the OP's problem must be something else, probably that
the header file defining the preproccessor symbol is not included.
-------------------------------------
This sig is dedicated to the advancement of Nuclear Power
Tommy Nordgren
email@hidden
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