How can I compile an iPhone project against Base SDK “iOS 3.1.3” without getting error messages saying “Undefined symbols for architecture i386”?
When using Base SDK “iOS 5.0” everything works fine, but I need to make sure the application works under iOS 3.1.3.
I use XCode 4.2. My frameworks all point to
/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.3.sdk/…
BUILD LOG:
Ld "***" normal i386
cd ***
setenv MACOSX_DEPLOYMENT_TARGET 10.5
setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/clang
-arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator3.1.3.sdk
-L/Users/***/Library/Developer/Xcode/DerivedData/***/Build/Products/Debug-iphonesimulator
-F/Users/***/Library/Developer/Xcode/DerivedData/***/Build/Products/Debug-iphonesimulator
-filelist "/Users/***/Library/Developer/Xcode/DerivedData/***/Build/Intermediates/***.build/Debug-iphonesimulator/***.build/Objects-normal/i386/***.LinkFileList"
-mmacosx-version-min=10.5
-Xlinker -objc_abi_version
-Xlinker 2 -Xlinker -no_implicit_dylibs
-D__IPHONE_OS_VERSION_MIN_REQUIRED=30000 -lsqlite3
-framework Foundation -framework UIKit -framework CoreGraphics
-o "/Users/***/Library/Developer/Xcode/DerivedData/***/Build/Products/Debug-iphonesimulator/***.app/***"
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_NSAutoreleasePool", referenced from:
"_OBJC_CLASS_$_NSDictionary", referenced from:
"_OBJC_CLASS_$_NSDecimalNumber", referenced from:
"_OBJC_CLASS_$_NSMutableCharacterSet", referenced from:
(and 50 more)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
You should always compile against the latest SDK. If you need to support older devices, you need to change the “Deployment Target” build setting, and test on a real device (since Apple no longer supplies the 3.x simulators).