TARGET_OS_MAC section generates a compile error on an iPhone project?

2010-08-27 Thread Tito Ciuro 
Hello,

I have code that's part of a framework and I'd like to port it to iOS. I tried 
isolating the code like so:

//
//  RootViewController.m
//  iPhoneTest

#import RootViewController.h

@implementation RootViewController


#pragma mark -
#pragma mark View lifecycle

- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
}

- (NSUInteger)systemPageSize
{
static NSUInteger __sSystemPageSize = NSNotFound;

#if TARGET_OS_MAC
if (NSNotFound == __sSystemPageSize) {
NSTask *task = [[NSTask alloc] init];

// do something here...

[task release];
}
#elif TARGET_OS_IPHONE

// do something here...

#endif

return __sSystemPageSize;
}

When I compile the standard iPhone boilerplate app from Xcode I get the 
following error:

 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m: In function 
 '-[RootViewController systemPageSize]':
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: 
 'NSTask' undeclared (first use in this function)
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: 
 (Each undeclared identifier is reported only once
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: for 
 each function it appears in.)
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: 
 'task' undeclared (first use in this function)
 {standard input}:59:non-relocatable subtraction expression, 
 L_OBJC_SELECTOR_REFERENCES_0 minus L001$pb
 {standard input}:59:symbol: L_OBJC_SELECTOR_REFERENCES_0 can't be undefined 
 in a subtraction expression
 {standard input}:54:non-relocatable subtraction expression, 
 L_OBJC_CLASSLIST_SUP_REFS_$_0 minus L001$pb
 {standard input}:54:symbol: L_OBJC_CLASSLIST_SUP_REFS_$_0 can't be 
 undefined in a subtraction expression
 {standard input}:unknown:Undefined local symbol L_OBJC_CLASSLIST_SUP_REFS_$_0
 {standard input}:unknown:Undefined local symbol L_OBJC_SELECTOR_REFERENCES_0


I know NSTask doesn't exist on iOS, so I was hoping to implement the method 
that would work for both Mac and iOS by specifying TARGET_OS_MAC and 
TARGET_OS_IPHONE. What am I missing?

Thanks,

-- Tito
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Re: TARGET_OS_MAC section generates a compile error on an iPhone project?

2010-08-27 Thread Kyle Sluder 
Read this: 
http://sealiesoftware.com/blog/archive/2010/8/16/TargetConditionalsh.html

--Kyle Sluder
(Sent from the road)

On Aug 27, 2010, at 1:47 PM, Tito Ciuro tci...@mac.com wrote:

 Hello,
 
 I have code that's part of a framework and I'd like to port it to iOS. I 
 tried isolating the code like so:
 
 //
 //  RootViewController.m
 //  iPhoneTest
 
 #import RootViewController.h
 
 @implementation RootViewController
 
 
 #pragma mark -
 #pragma mark View lifecycle
 
 - (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
 }
 
 - (NSUInteger)systemPageSize
 {
static NSUInteger __sSystemPageSize = NSNotFound;
 
 #if TARGET_OS_MAC
if (NSNotFound == __sSystemPageSize) {
NSTask *task = [[NSTask alloc] init];
 
// do something here...
 
[task release];
}
 #elif TARGET_OS_IPHONE
 
// do something here...
 
 #endif
 
return __sSystemPageSize;
 }
 
 When I compile the standard iPhone boilerplate app from Xcode I get the 
 following error:
 
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m: In function 
 '-[RootViewController systemPageSize]':
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: 
 'NSTask' undeclared (first use in this function)
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: 
 (Each undeclared identifier is reported only once
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: for 
 each function it appears in.)
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: 
 'task' undeclared (first use in this function)
 {standard input}:59:non-relocatable subtraction expression, 
 L_OBJC_SELECTOR_REFERENCES_0 minus L001$pb
 {standard input}:59:symbol: L_OBJC_SELECTOR_REFERENCES_0 can't be 
 undefined in a subtraction expression
 {standard input}:54:non-relocatable subtraction expression, 
 L_OBJC_CLASSLIST_SUP_REFS_$_0 minus L001$pb
 {standard input}:54:symbol: L_OBJC_CLASSLIST_SUP_REFS_$_0 can't be 
 undefined in a subtraction expression
 {standard input}:unknown:Undefined local symbol L_OBJC_CLASSLIST_SUP_REFS_$_0
 {standard input}:unknown:Undefined local symbol L_OBJC_SELECTOR_REFERENCES_0
 
 
 I know NSTask doesn't exist on iOS, so I was hoping to implement the method 
 that would work for both Mac and iOS by specifying TARGET_OS_MAC and 
 TARGET_OS_IPHONE. What am I missing?
 
 Thanks,
 
 -- Tito
 ___
 
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Re: TARGET_OS_MAC section generates a compile error on an iPhone project?

2010-08-27 Thread David Duncan 

On Aug 27, 2010, at 10:47 AM, Tito Ciuro wrote:

 - (NSUInteger)systemPageSize
 {
static NSUInteger __sSystemPageSize = NSNotFound;
 
 #if TARGET_OS_MAC
if (NSNotFound == __sSystemPageSize) {
NSTask *task = [[NSTask alloc] init];
 
// do something here...
 
[task release];
}
 #elif TARGET_OS_IPHONE
 
// do something here...
 
 #endif
 
return __sSystemPageSize;
 }


There is no reason to use NSTask for this on the desktop. Just call 
getpagesize() on either platform.
--
David Duncan

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Re: TARGET_OS_MAC section generates a compile error on an iPhone project?

2010-08-27 Thread Tito Ciuro 
Excellent!

Thanks Kyle!

-- Tito

On 27/08/2010, at 14:02, Kyle Sluder wrote:

 Read this: 
 http://sealiesoftware.com/blog/archive/2010/8/16/TargetConditionalsh.html
 
 --Kyle Sluder
 (Sent from the road)
 
 On Aug 27, 2010, at 1:47 PM, Tito Ciuro tci...@mac.com wrote:
 
 Hello,
 
 I have code that's part of a framework and I'd like to port it to iOS. I 
 tried isolating the code like so:
 
 //
 //  RootViewController.m
 //  iPhoneTest
 
 #import RootViewController.h
 
 @implementation RootViewController
 
 
 #pragma mark -
 #pragma mark View lifecycle
 
 - (void)viewWillAppear:(BOOL)animated {
   [super viewWillAppear:animated];
 }
 
 - (NSUInteger)systemPageSize
 {
   static NSUInteger __sSystemPageSize = NSNotFound;
 
 #if TARGET_OS_MAC
   if (NSNotFound == __sSystemPageSize) {
   NSTask *task = [[NSTask alloc] init];
 
   // do something here...
 
   [task release];
   }
 #elif TARGET_OS_IPHONE
 
   // do something here...
 
 #endif
 
   return __sSystemPageSize;
 }
 
 When I compile the standard iPhone boilerplate app from Xcode I get the 
 following error:
 
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m: In function 
 '-[RootViewController systemPageSize]':
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: 
 'NSTask' undeclared (first use in this function)
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: 
 (Each undeclared identifier is reported only once
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: 
 for each function it appears in.)
 /Users/tciuro/Desktop/iPhoneTest/Classes/RootViewController.m:23: error: 
 'task' undeclared (first use in this function)
 {standard input}:59:non-relocatable subtraction expression, 
 L_OBJC_SELECTOR_REFERENCES_0 minus L001$pb
 {standard input}:59:symbol: L_OBJC_SELECTOR_REFERENCES_0 can't be 
 undefined in a subtraction expression
 {standard input}:54:non-relocatable subtraction expression, 
 L_OBJC_CLASSLIST_SUP_REFS_$_0 minus L001$pb
 {standard input}:54:symbol: L_OBJC_CLASSLIST_SUP_REFS_$_0 can't be 
 undefined in a subtraction expression
 {standard input}:unknown:Undefined local symbol 
 L_OBJC_CLASSLIST_SUP_REFS_$_0
 {standard input}:unknown:Undefined local symbol L_OBJC_SELECTOR_REFERENCES_0
 
 
 I know NSTask doesn't exist on iOS, so I was hoping to implement the method 
 that would work for both Mac and iOS by specifying TARGET_OS_MAC and 
 TARGET_OS_IPHONE. What am I missing?
 
 Thanks,
 
 -- Tito
 ___
 
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 Contact the moderators at cocoa-dev-admins(at)lists.apple.com
 
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Re: TARGET_OS_MAC section generates a compile error on an iPhone project?

2010-08-27 Thread Tito Ciuro 
On 27/08/2010, at 14:05, David Duncan wrote:

 
 On Aug 27, 2010, at 10:47 AM, Tito Ciuro wrote:
 
 - (NSUInteger)systemPageSize
 {
   static NSUInteger __sSystemPageSize = NSNotFound;
 
 #if TARGET_OS_MAC
   if (NSNotFound == __sSystemPageSize) {
   NSTask *task = [[NSTask alloc] init];
 
   // do something here...
 
   [task release];
   }
 #elif TARGET_OS_IPHONE
 
   // do something here...
 
 #endif
 
   return __sSystemPageSize;
 }
 
 
 There is no reason to use NSTask for this on the desktop. Just call 
 getpagesize() on either platform.
 --
 David Duncan

Great to know. I'll update the code right away.

Thanks Duncan,

-- Tito

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