iOS target does not build

[dodikk]

I'm trying to build you master branch on my build server. Build fails since "ARC_ENABLED" flag is not set by default.
Please fix default settings of your projects

Either set
CLANG_ENABLE_OBJC_ARC = NO

Or set
GCC_PREPROCESSOR_DEFINITIONS = DEBUG=1 $(inherited) ARC_ENABLED

/Users/darthvader/.jenkins/jobs/TBXML/workspace/TBXML-Code/TBXML+HTTP.m:21:13: error: 'autorelease' is unavailable: not available in automatic reference counting mode
return [request autorelease];
^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:37:1: note: declaration has been explicitly marked unavailable here

• (id)autorelease NS_AUTOMATED_REFCOUNT_UNAVAILABLE;
  ^
  /Users/darthvader/.jenkins/jobs/TBXML/workspace/TBXML-Code/TBXML+HTTP.m:21:13: error: ARC forbids explicit message send of 'autorelease'
  return [request autorelease];
  ^ ~~~~~~~~~~~
  /Users/darthvader/.jenkins/jobs/TBXML/workspace/TBXML-Code/TBXML+HTTP.m:47:6: error: 'release' is unavailable: not available in automatic reference counting mode
  [params release];
  ^
  /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:36:1: note: declaration has been explicitly marked unavailable here
• (oneway void)release NS_AUTOMATED_REFCOUNT_UNAVAILABLE;
  ^
  /Users/darthvader/.jenkins/jobs/TBXML/workspace/TBXML-Code/TBXML+HTTP.m:47:6: error: ARC forbids explicit message send of 'release'
  [params release];
  ^ ~~~~~~~
  /Users/darthvader/.jenkins/jobs/TBXML/workspace/TBXML-Code/TBXML+HTTP.m:48:13: error: 'autorelease' is unavailable: not available in automatic reference counting mode
  return [request autorelease];
  ^
  /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.1.sdk/System/Library/Frameworks/Foundation.framework/Headers/NSObject.h:37:1: note: declaration has been explicitly marked unavailable here
• (id)autorelease NS_AUTOMATED_REFCOUNT_UNAVAILABLE;
  ^
  /Users/darthvader/.jenkins/jobs/TBXML/workspace/TBXML-Code/TBXML+HTTP.m:48:13: error: ARC forbids explicit message send of 'autorelease'
  return [request autorelease];
  ^ ~~~~~~~~~~~
  6 errors generated.

[MartinMReed]

See pull request #23. The fix is to use __has_feature(objc_arc) instead of ARC_ENABLED