ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/2] COPY ../../libcxx/include/__cxx03/__bit/popcount.h include/c++/v1/__cxx03/__bit/popcount.h
[2/2] COPY ../../libcxx/include/__cxx03/__algorithm/count.h include/c++/v1/__cxx03/__algorithm/count.h