Building on Arm64 macOS using cmake throws an error.

[sarooptech]

• axmol version: 2.5.9
• devices test on: MacBook Air M3
• developing environments
  • NDK version: r23c
  • Xcode version: 16.3
  • cmake version: 4.0.1
  • VS Code: 1.99.3
  • The default cmake project generator is "Unix Makefiles"

Steps to Reproduce:

1. Create a new project using axmol CLI.
2. Create a build directory and navigate into it using: mkdir build && cd build
3. Generate build files using cmake: cmake ..
4. Build the project using make
5. It will fail to build and throw an error in the axmol/core/media/AvfMediaEngine.mm file, Line number 368.

Solution:

• Replacing __weak with __unsafe_unretained fixes the problem.

Notes:

• Building using the Xcode generator works without any problem.
• I'm using VSCode, which does not use Xcode generator to create a project by default.
• An error is thrown because the project is using ARC-style code with manual memory management for .mm files. For Xcode, it is working fine because the -fobjc-arc flag is applied to the mm files. The proper solution will be to use the same for other builders.

[halx99]

Axmol not support cmake generator other than -GXcode to build apple target platforms.