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