AppLog for NSLog

An Applog Issue

Taken from iOS recipes and renamed to something I find easier to type ;)

This all works fine. When -DAPPDEBUG=1 is not defined nothing gets logged.

When defined AppLog works like NSLog.

But - when defined - I get a "Semantic issue: Implicit declaration of function 'AppDebugLog' is invalid in C99" every place I use AppLog as an XCode warning.

Should I ignore? Have I imported the header in the wrong place?

AppLog.h

#ifdef APPDEBUG
#define AppLog(format...) AppDebugLog(__FILE__, __LINE__, format)
#else
#define AppLog(format...)
#endif

AppLog.m

void AppDebugLog(const char *fileName, int lineNumber, NSString *fmt, ...) {
    va_list args;
    va_start(args, fmt);
    static NSDateFormatter *debugFormatter = nil;
    if (debugFormatter == nil) {
        debugFormatter = [[NSDateFormatter alloc] init];
        [debugFormatter setDateFormat:@"yyyyMMdd.HH:mm:ss"];
    }
    NSString *msg = [[NSString alloc] initWithFormat:fmt arguments:args];
    NSString *filePath = [[NSString alloc] initWithUTF8String:fileName];
    NSString *timestamp = [debugFormatter stringFromDate:[NSDate date]];
    NSDictionary *info = [[NSBundle mainBundle] infoDictionary];
    NSString *appName = [info objectForKey:(NSString *)kCFBundleNameKey];
    fprintf(stdout, "%s %s[%s:%d] %s\n",
            [timestamp UTF8String],
            [appName UTF8String],
            [[filePath lastPathComponent] UTF8String],
            lineNumber,
            [msg UTF8String]);
    
    va_end(args);
    [msg release];
    [filePath release];
}

project_Prefix.pch

//
// Prefix header for all source files of the 'incogito' target in the 'incogito' project
//
#import <Availability.h>

#ifndef __IPHONE_4_0
#warning "This project uses features only available in iPhone SDK 4.0 and later."
#endif


#ifdef __OBJC__
    #import <Foundation/Foundation.h>
    #import <UIKit/UIKit.h>
    #import <CoreData/CoreData.h>
#endif

#import "AppLog.h"