Thank you for advice. I cannot find any document about "record-sources" nor "flat". From where can I set these options? I tried to compile with "record-sources" or "flat" and I got error. And I also tried "gembed-source" but cannot see and debug shader source in Xcode.)

Thank you. I found options for -frecord-sources=flat in Metal Developer Tools 2.0 beta 5 (I used 1.2 before). And I tried with Xcode 13 beta 5 but sources is not displayed on Xcode yet. I use newLibraryWithData to load shaders so I guess .metallibsym is not loaded in application. Is there any way to load .metallibsym manually?