GitLab

This means it is impossible to generate Xcode projects. This is a complete showstopper. I'm surprised there isn't an issue already filed and that I found nothing in a wider internet search.

Here is the error message. I've seen a missing product bundle identifier message from Xcode while developing my own code. It started with a recent version of Xcode. I can't remember if it was 10 or 11. I'm currently using 11.4.1 on macOS Catalina. Cmake 3.17.2.

Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang - broken
CMake Error at /Applications/CMake.app/Contents/share/cmake-3.17/Modules/CMakeTestCCompiler.cmake:60 (message):
  The C compiler

    "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: /Users/mark/Projects/github/KTX-Software/lib/basisu/build/CMakeFiles/CMakeTmp
    
    Run Build Command(s):/usr/bin/xcodebuild -project CMAKE_TRY_COMPILE.xcodeproj build -target cmTC_32c34 -configuration Debug -hideShellScriptEnvironment && Command line invocation:
        /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild -project CMAKE_TRY_COMPILE.xcodeproj build -target cmTC_32c34 -configuration Debug -hideShellScriptEnvironment
    
    User defaults from command line:
        HideShellScriptEnvironment = YES
    
    Prepare build
    note: Using legacy build system
    === BUILD TARGET cmTC_32c34 OF PROJECT CMAKE_TRY_COMPILE WITH CONFIGURATION Debug ===
    
    Check dependencies
    Code Signing Error: Bundle identifier is missing. cmTC_32c34 doesn't have a bundle identifier. Add a value for PRODUCT_BUNDLE_IDENTIFIER in the build settings editor.
    
    ** BUILD FAILED **
    
    
    The following build commands failed:
    	Check dependencies
    (1 failure)