delete mode 100644 lib/libc/include/x86_64-macos-gnu/AvailabilityVersions.h
 delete mode 100644 lib/libc/include/x86_64-macos-gnu/libDER/DERItem.h
 delete mode 100644 lib/libc/include/x86_64-macos-gnu/libDER/libDER_config.h
 create mode 100644 lib/libc/include/x86_64-macos-gnu/mach/mach_time.h
 delete mode 100644 lib/libc/include/x86_64-macos-gnu/os/clock.h
 delete mode 100644 lib/libc/include/x86_64-macos-gnu/os/workgroup.h
 delete mode 100644 lib/libc/include/x86_64-macos-gnu/os/workgroup_base.h
 delete mode 100644 lib/libc/include/x86_64-macos-gnu/os/workgroup_interval.h
 delete mode 100644 lib/libc/include/x86_64-macos-gnu/os/workgroup_object.h
 delete mode 100644 lib/libc/include/x86_64-macos-gnu/os/workgroup_parallel.h
 create mode 100644 lib/libc/include/x86_64-macos-gnu/pthread_impl.h