ninja: Entering directory `out/gn'
[1/3] COPY ../../libcxx/include/__configuration/platform.h include/c++/v1/__configuration/platform.h
[2/3] COPY ../../libcxx/include/__config include/c++/v1/__config
[3/3] COPY ../../libcxx/include/__random/binomial_distribution.h include/c++/v1/__random/binomial_distribution.h