gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libcxx/docs/TestingLibcxx.rst",
    "//libcxx/test/benchmarks/spec.gen.py",
    "//libcxx/test/configs/apple-libc++-shared.cfg.in",
    "//libcxx/test/configs/apple-libc++-system.cfg.in",
    "//libcxx/test/configs/armv7m-picolibc-libc++.cfg.in",
    "//libcxx/test/configs/ibm-libc++-shared.cfg.in",
    "//libcxx/test/configs/llvm-libc++-android.cfg.in",
    "//libcxx/test/configs/llvm-libc++-mingw.cfg.in",
    "//libcxx/test/configs/llvm-libc++-shared-clangcl.cfg.in",
    "//libcxx/test/configs/llvm-libc++-shared-gcc.cfg.in",
    "//libcxx/test/configs/llvm-libc++-shared-no-vcruntime-clangcl.cfg.in",
    "//libcxx/test/configs/llvm-libc++-shared.cfg.in",
    "//libcxx/test/configs/llvm-libc++-static-clangcl.cfg.in",
    "//libcxx/test/configs/llvm-libc++-static.cfg.in",
    "//libcxx/test/configs/stdlib-libstdc++.cfg.in",
    "//libcxx/test/configs/stdlib-native.cfg.in",
    "//libcxx/test/selftest/dsl/dsl.sh.py",
    "//libcxx/test/selftest/dsl/lit.local.cfg",
    "//libcxx/test/selftest/file_dependencies/absolute-and-relative-paths.sh.cpp",
    "//libcxx/test/selftest/file_dependencies/substitute-in-dependencies.sh.cpp",
    "//libcxx/test/selftest/tmpdir-exists.sh.cpp",
    "//libcxx/utils/libcxx/test/dsl.py",
    "//libcxx/utils/libcxx/test/format.py",
    "//libcxx/utils/ssh.py",
    "//libcxx/utils/test-at-commit",
    "//libcxxabi/test/configs/apple-libc++abi-shared.cfg.in",
    "//libcxxabi/test/configs/apple-libc++abi-system.cfg.in",
    "//libcxxabi/test/configs/armv7m-picolibc-libc++abi.cfg.in",
    "//libcxxabi/test/configs/ibm-libc++abi-shared.cfg.in",
    "//libcxxabi/test/configs/llvm-libc++abi-android.cfg.in",
    "//libcxxabi/test/configs/llvm-libc++abi-merged.cfg.in",
    "//libcxxabi/test/configs/llvm-libc++abi-mingw.cfg.in",
    "//libcxxabi/test/configs/llvm-libc++abi-shared-clangcl.cfg.in",
    "//libcxxabi/test/configs/llvm-libc++abi-shared.cfg.in",
    "//libcxxabi/test/configs/llvm-libc++abi-static-clangcl.cfg.in",
    "//libcxxabi/test/configs/llvm-libc++abi-static.cfg.in",
    "//libunwind/test/configs/apple-libunwind-system.cfg.in",
    "//libunwind/test/configs/armv7m-picolibc-libunwind.cfg.in",
    "//libunwind/test/configs/ibm-libunwind-shared.cfg.in",
    "//libunwind/test/configs/llvm-libunwind-merged.cfg.in",
    "//libunwind/test/configs/llvm-libunwind-shared-mingw.cfg.in",
    "//libunwind/test/configs/llvm-libunwind-shared.cfg.in",
    "//libunwind/test/configs/llvm-libunwind-static-mingw.cfg.in",
    "//libunwind/test/configs/llvm-libunwind-static.cfg.in"
  ],
  "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": []
}