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POsysctlbyname error Implicit declaration of function 'sysctlbyname' is invalid in C99
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  1. POsysctlbyname error Implicit declaration of function 'sysctlbyname' is invalid in C99
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    copied!<p>I am getting an error "Implicit declaration of function 'sysctlbyname' is invalid in C99" when i used this code. I used it before and it was fine so I don't know what happen.</p> <p>I am currently developing for iOS7 devices only and using the latest ver of xcode 5 that is on the app store</p> <p>UIDeviceHardware.m</p> <pre><code>@interface UIDeviceHardware : NSObject - (NSString *) platform; - (NSString *) platformString; @end </code></pre> <p>UIDeviceHardware.m</p> <pre><code>- (NSString *) platform{ size_t size; sysctlbyname("hw.machine", NULL, &amp;size, NULL, 0); char *machine = malloc(size); sysctlbyname("hw.machine", machine, &amp;size, NULL, 0); NSString *platform = [NSString stringWithUTF8String:machine]; free(machine); return platform; } - (NSString *) platformString{ NSString *platform = [self platform]; if ([platform isEqualToString:@"iPhone1,1"]) return @"iPhone 1G"; if ([platform isEqualToString:@"iPhone1,2"]) return @"iPhone 3G"; if ([platform isEqualToString:@"iPhone2,1"]) return @"iPhone 3GS"; if ([platform isEqualToString:@"iPhone3,1"]) return @"iPhone 4 (GSM)"; if ([platform isEqualToString:@"iPhone3,3"]) return @"iPhone 4 (CDMA)"; if ([platform isEqualToString:@"iPhone4,1"]) return @"iPhone 4S"; if ([platform isEqualToString:@"iPhone5,1"]) return @"iPhone 5 (GSM)"; if ([platform isEqualToString:@"iPhone5,2"]) return @"iPhone 5 (GSM+CDMA)"; if ([platform isEqualToString:@"iPhone5,3"]) return @"iPhone 5c (GSM)"; if ([platform isEqualToString:@"iPhone5,4"]) return @"iPhone 5c (GSM+CDMA)"; if ([platform isEqualToString:@"iPhone6,1"]) return @"iPhone 5s (GSM)"; if ([platform isEqualToString:@"iPhone6,2"]) return @"iPhone 5s (GSM+CDMA)"; if ([platform isEqualToString:@"iPhone7,1"]) return @"iPhone 6 GSM"; if ([platform isEqualToString:@"iPhone7,2"]) return @"iPhone 6 GSM+CDMA"; if ([platform isEqualToString:@"iPhone8,1"]) return @"iPhone 6+ GSM"; if ([platform isEqualToString:@"iPhone8,2"]) return @"iPhone 6+ Global"; if ([platform isEqualToString:@"iPod1,1"]) return @"iPod Touch 1G"; if ([platform isEqualToString:@"iPod2,1"]) return @"iPod Touch 2G"; if ([platform isEqualToString:@"iPod3,1"]) return @"iPod Touch 3G"; if ([platform isEqualToString:@"iPod4,1"]) return @"iPod Touch 4G"; if ([platform isEqualToString:@"iPod5,1"]) return @"iPod Touch 5G"; if ([platform isEqualToString:@"iPad1,1"]) return @"iPad"; if ([platform isEqualToString:@"iPad2,1"]) return @"iPad 2 (WiFi)"; if ([platform isEqualToString:@"iPad2,2"]) return @"iPad 2 (GSM)"; if ([platform isEqualToString:@"iPad2,3"]) return @"iPad 2 (CDMA)"; if ([platform isEqualToString:@"iPad2,4"]) return @"iPad 2 (WiFi)"; if ([platform isEqualToString:@"iPad2,5"]) return @"iPad Mini (WiFi)"; if ([platform isEqualToString:@"iPad2,6"]) return @"iPad Mini (GSM)"; if ([platform isEqualToString:@"iPad2,7"]) return @"iPad Mini (GSM+CDMA)"; if ([platform isEqualToString:@"iPad3,1"]) return @"iPad 3 (WiFi)"; if ([platform isEqualToString:@"iPad3,2"]) return @"iPad 3 (GSM+CDMA)"; if ([platform isEqualToString:@"iPad3,3"]) return @"iPad 3 (GSM)"; if ([platform isEqualToString:@"iPad3,4"]) return @"iPad 4 (WiFi)"; if ([platform isEqualToString:@"iPad3,5"]) return @"iPad 4 (GSM)"; if ([platform isEqualToString:@"iPad3,6"]) return @"iPad 4 (GSM+CDMA)"; if ([platform isEqualToString:@"iPad4,1"]) return @"iPad Air (WiFi)"; if ([platform isEqualToString:@"iPad4,2"]) return @"iPad Air (GSM)"; if ([platform isEqualToString:@"iPad4,4"]) return @"iPad Mini Retina (WiFi)"; if ([platform isEqualToString:@"iPad4,5"]) return @"iPad Mini Retina (GSM)"; if ([platform isEqualToString:@"i386"]) return @"Simulator"; if ([platform isEqualToString:@"x86_64"]) return @"Simulator"; return platform; } </code></pre>
 

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