Awesome Open Source
Awesome Open Source

A CMake toolchain file for iOS (+ Catalyst), watchOS, tvOS and macOS development with full simulator support and toggleable options!


  • Experimental Catalyst support (iOS on macOS)
  • macOS support and experimental Apple Silicon support
  • Deprecated options now removed.
  • Builds now run on Github Actions


catalyst-jobs   combined-jobs   ios-jobs

macos-jobs   tvos-jobs   watchos-jobs

Tested with the following combinations:

  • XCode 11.7
    • iOS SDK 9.0 & 11.0
    • watchOS SDK 5.0
    • tvOS SDK 11.0
  • XCode 12.5.1
    • iOS SDK 12.0
    • watchOS SDK 7.0
    • macOS SDK 10.13
    • iOS, watchOS, tvOS combined builds, mixed SDKs
  • XCode 13.2
    • Mac Catalyst SDK 13.0
    • macOS SDK 11.0

Platform flag options (-DPLATFORM=flag)

  • OS - to build for iOS (armv7, armv7s, arm64) DEPRECATED in favour of OS64
  • OS64 - to build for iOS (arm64 only)
  • OS64COMBINED - to build for iOS & iOS Simulator (FAT lib) (arm64, x86_64)
  • SIMULATOR - to build for iOS simulator 32 bit (i386) DEPRECATED
  • SIMULATOR64 - to build for iOS simulator 64 bit (x86_64)
  • SIMULATORARM64 - to build for iOS simulator 64 bit (arm64)
  • TVOS - to build for tvOS (arm64)
  • TVOSCOMBINED - to build for tvOS & tvOS Simulator (arm64, x86_64)
  • SIMULATOR_TVOS - to build for tvOS Simulator (x86_64)
  • WATCHOS - to build for watchOS (armv7k, arm64_32)
  • WATCHOSCOMBINED - to build for watchOS & Simulator (armv7k, arm64_32, i386)
  • SIMULATOR_WATCHOS - to build for watchOS Simulator (i386)
  • MAC - to build for macOS (x86_64)
  • MAC_ARM64 - to build for macOS on Apple Silicon (arm64)
  • MAC_UNIVERSAL - to build for macOS on x86_64 and Apple Silicon (arm64) combined
  • MAC_CATALYST - to build iOS for Mac (Catalyst, x86_64)
  • MAC_CATALYST_ARM64 - to build iOS for Mac on Apple Silicon (Catalyst, arm64)

Example usage

NOTE: Change the -DPLATFORM to an applicable value if targeting another platform.

cd example/example-lib
mkdir build
cd build
cmake .. -G Xcode -DCMAKE_TOOLCHAIN_FILE=../../ios.toolchain.cmake -DPLATFORM=OS64
cmake --build . --config Release

This will build the library for the given PLATFORM. In this case, iOS with the arm64 architecture.


The options called *COMBINED (OS64COMBINED, TVOSCOMBINED and WATCHOSCOMBINED) will build complete FAT-libraries for the given platform. These FAT-libraries include slices for both device and simulator, making the distribution and usage of the library much more simple!


cmake . -G Xcode -DCMAKE_TOOLCHAIN_FILE=../../ios.toolchain.cmake -DPLATFORM=OS64COMBINED
cmake --build . --config Release
cmake --install . --config Release # Necessary to build combined library

NOTE: The COMBINED options ONLY work with the Xcode generator (-G Xcode) on CMake versions 3.14+!

Exposed Variables

XCODE_VERSION - Version number (not including Build version) of Xcode detected.

SDK_VERSION - Version of SDK being used.

CMAKE_OSX_ARCHITECTURES - Architectures being compiled for (generated from PLATFORM).

APPLE_TARGET_TRIPLE - Used by autoconf build systems.

Additional Options

-DENABLE_BITCODE=(BOOL) - Enabled by default, specify FALSE or 0 to disable bitcode

-DENABLE_ARC=(BOOL) - Enabled by default, specify FALSE or 0 to disable ARC

-DENABLE_VISIBILITY=(BOOL) - Disabled by default, specify TRUE or 1 to enable symbol visibility support

-DENABLE_STRICT_TRY_COMPILE=(BOOL) - Disabled by default, specify TRUE or 1 to enable strict compiler checks (will run linker on all compiler checks whenever needed)

-DARCHS=(STRING) - Valid values are: armv7, armv7s, arm64, i386, x86_64, armv7k, arm64_32. By default it will build for all valid architectures based on -DPLATFORM (see above)

To combine all platforms into the same FAT-library, either build any of the "COMBINED" platform types OR use the LIPO tool. More information on how to combine libraries with LIPO is readily available on the net.

Thanks To

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