Building a universal library for macOS

[fdidron]

Hello,

I'm currently trying to build a universal version of hidapi. I've generated an Xcode project using make, and am now in the process to get that setup.

I will post my progress here, but in the meantime if anyone has any pointers on how to achieve that would be great :)

[fdidron]

Well I found a way to do it with cmake right after posting this, maybe this can be helpful.

Add the CMAKE_OSX_ARCHITECTURES=x86_64;arm64 to the cmake command.

Following the Cmake building guide:

# Executed from the root of the repository
mkdir build
cmake .. -DCMAKE_OSX_ARCHITECTURES=x86_64;arm64
cmake --build .
cmake --build . --target install

To make sure the result is a universal lib, run file /usr/local/lib/libhidapi.dylib you should see

Mach-O universal binary with 2 architectures:
[x86_64:Mach-O 64-bit dynamically linked shared library x86_64]
[arm64:Mach-O 64-bit dynamically linked shared library arm64]

Edited to add @Youw suggestion.

[Youw]

Don't modify CMake files, pass it as a command-line parameter: cmake .. -DCMAKE_OSX_ARCHITECTURES=x86_64;arm64

[fdidron]

@Youw Thanks for the suggestion, I edited the solution.