ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/3] ACTION //libcxx/include:write_config_site(//llvm/utils/gn/build/toolchain:unix)
[2/3] STAMP obj/libcxx/include/write_config_site.stamp
[3/3] STAMP obj/libcxx/include/copy_headers.inputdeps.stamp