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