ninja: Entering directory `out/gn'
[1/5] COPY ../../libcxx/include/variant include/c++/v1/variant
[2/5] COPY ../../libcxx/include/__availability include/c++/v1/__availability
[3/5] COPY ../../libcxx/include/streambuf include/c++/v1/streambuf
[4/5] STAMP obj/libcxx/include/copy_headers.stamp
[5/5] STAMP obj/clang/tools/driver/clang.inputdeps.stamp