gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libc/hdr/CMakeLists.txt",
    "//libc/hdr/poll_macros.h",
    "//libc/hdr/poll_overlay.h",
    "//libc/hdr/sys_socket_macros.h",
    "//libc/hdr/sys_socket_overlay.h",
    "//libc/hdr/types/CMakeLists.txt",
    "//libc/hdr/types/nfds_t.h",
    "//libc/hdr/types/sa_family_t.h",
    "//libc/hdr/types/socklen_t.h",
    "//libc/hdr/types/struct_cmsghdr.h",
    "//libc/hdr/types/struct_linger.h",
    "//libc/hdr/types/struct_mmsghdr.h",
    "//libc/hdr/types/struct_msghdr.h",
    "//libc/hdr/types/struct_pollfd.h",
    "//libc/hdr/types/struct_sockaddr.h",
    "//libc/hdr/types/struct_sockaddr_storage.h",
    "//utils/bazel/llvm-project-overlay/libc/BUILD.bazel"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//compiler-rt/test/hwasan:check-hwasan",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}
running all tests due to change to blacklisted file