Apple Mach-O linker (id) warning : building for MacOSX, but linking against dylib built for iOS

ios xcode linker dylib mach-o
Igor picture Igor · Aug 24, 2011 · Viewed 9.6k times · Source

Starting from some point in the past xCode 4 in complaining about linker problems:

ld: warning: building for MacOSX, but linking against dylib built for iOS: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk/System/Library/Frameworks//CoreGraphics.framework/CoreGraphics

I have checked everything but still nothing suspicious in the config and it compiles and runs. The only thing that I see it is double slashes before CoreGraphics.framework, why I do not know. Tried remove and add again library on "Build phases" that did not help.

Answer

James Moore picture James Moore · Jul 29, 2013

Sometimes it's easier to debug Xcode problems by looking at the build log for the command lines it's using.

If you're building from the command line, you can get that message if you don't specify -miphoneos-version-min= 

This compiles:
(where conftest.c just contains int main() {})
/Applications/Xcode5.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch i386 --sysroot /Applications/Xcode5.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk --sysroot /Applications/Xcode5.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk -miphoneos-version-min=6.0 conftest.c

And this gives the error:
/Applications/Xcode5.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch i386 --sysroot /Applications/Xcode5.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk --sysroot /Applications/Xcode5.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk  conftest.c
ld: building for MacOSX, but linking against dylib built for iOS Simulator file '/Applications/Xcode5.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk/usr/lib/libSystem.dylib' for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Related questions

ld: file not found: linker command failed with exit code 1

I've got the following error when building the project in Xcode: ld: file not found /Users/MacBookPro/Library/Developer/Xcode/DerivedData/Social_Events-cfnteabiivwfdzcoulzznhmgobhy/Build/Products/Debug-iphoneos/Social_Events.app/Social_Events clang: error: linker command failed with exit code 1 (use …

Read More
Apple Mach -O Linker (Id) Error?

I am trying to build this xcode workspace which was built from Unity. And after modifying the project a little bit when I getting to the very end of building the project (linking) I get the Apple Mach -O Linker (…

Read More
Xcode 6 linker error - Undefined symbols for architecture armv7

After upgrading to Xcode 6 beta 7 (and now still with Xcode 6 GM) I am unable to link my Swift app. I receive errors such as: Undefined symbols for architecture armv7: "_swift_stdlib_compareNSStringDeterministicUnicodeCollation", referenced from: ... ld: symbol(s) not found for …

Read More