CMake broken after update to Xcode 7.0

16
votes

I use QtCreator and CMake for c++ development on a Mac, after updating to Xcode 7.0, CMake seems broken, after running CMake I got this warning:

CMake Warning at /usr/local/Cellar/cmake/HEAD/share/cmake/Modules/Platform/Darwin-Initialize.cmake:128 (message): Ignoring CMAKE_OSX_SYSROOT value:

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk

because the directory does not exist. Call Stack (most recent call first): /usr/local/Cellar/cmake/HEAD/share/cmake/Modules/CMakeSystemSpecificInitialize.cmake:18 (include) CMakeLists.txt:3 (project)

and build, I got this error:

*** No rule to make target `/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/System/Library/Frameworks/Accelerate.framework'

I know that Xcode 7.0 has removed MacOSX10.10.sdk and added MacOSX10.11.sdk, so I thought it might be my cmake is too old, I updated my cmake to 3.3.2 with homebrew but still doesn't work, does anyone know how to fix this? Thanks!

3
xcodemacoscmakexcode7
Does this happen in a clean repository that you just setup, or are you working in a dirty repository that predates the upgrade? It's possible that your CMakeCache.txt was configured before the upgrade and contains a reference to the old directory. If so, you can try deleting your CMakeCache.txt and reconfiguring. – Alex
hmm, thank @Alex, it was indeed the CMakeCache.txt issue, but not in my current project folder, my current project folder was a clean repo, but one of the dependency had a old CMakeCache.txt – Carl Yuheng Ren
Sounds good. I see you added your own answer, go ahead and accept it so that future visitors can see it. – Alex
I had to change/update the CMAKE_OSX_SYSROOT path. – wcochran

3 Answers

52
votes

delete any old CMakeCache.txt in current project and dependencies and rebuild solves the problem.

10
votes

If someone is using Clion you can try

Tools > CMake > Reset cache and reload project

4
votes

The default value for CMAKE_OSX_SYSROOT appears to be baked into the cmake executable, and automatically added to newly-created CMakeCache.txt cache files.

So I needed to both upgrade cmake and then delete all my CMakeCache.txt files to get CMake working again.