ninja: Entering directory `out/gn'
[1/4] COPY ../../libcxx/include/__format/format_arg.h include/c++/v1/__format/format_arg.h
[2/4] COPY ../../libcxx/include/__type_traits/remove_cv.h include/c++/v1/__type_traits/remove_cv.h
[3/4] STAMP obj/libcxx/include/copy_headers.stamp
[4/4] STAMP obj/clang/tools/driver/clang.inputdeps.stamp