ninja: Entering directory `out/gn'
[1/4] ACTION //libcxx/include:write_modulemap(//llvm/utils/gn/build/toolchain:unix)
[2/4] COPY ../../libcxx/include/__flat_map/flat_map.h include/c++/v1/__flat_map/flat_map.h
[3/4] COPY ../../libcxx/include/__flat_map/key_value_iterator.h include/c++/v1/__flat_map/key_value_iterator.h
[4/4] COPY ../../libcxx/include/__flat_map/utils.h include/c++/v1/__flat_map/utils.h