gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libcxx/include/CMakeLists.txt",
    "//libcxx/include/__filesystem/path.h",
    "//libcxx/include/__functional/bind.h",
    "//libcxx/include/__functional/hash.h",
    "//libcxx/include/__functional/identity.h",
    "//libcxx/include/__fwd/functional.h",
    "//libcxx/include/__thread/id.h",
    "//libcxx/include/__thread/support/pthread.h",
    "//libcxx/include/__type_traits/is_reference_wrapper.h",
    "//libcxx/include/__type_traits/unwrap_ref.h",
    "//libcxx/include/experimental/propagate_const",
    "//libcxx/include/filesystem",
    "//libcxx/include/libcxx.imp",
    "//libcxx/include/module.modulemap.in",
    "//libcxx/include/optional",
    "//libcxx/include/type_traits",
    "//libcxx/test/libcxx/transitive_includes/cxx23.csv",
    "//libcxx/test/libcxx/transitive_includes/cxx26.csv",
    "//libcxx/utils/generate_iwyu_mapping.py",
    "//llvm/utils/gn/secondary/libcxx/include/BUILD.gn"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}
running all tests due to change to blacklisted file