gn analyze output:
{
  "compile_targets": [],
  "status": "Found dependency",
  "test_targets": [
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang"
  ]
}
gn analyze input:
{
  "files": [
    "//libcxx/docs/FeatureTestMacroTable.rst",
    "//libcxx/docs/ReleaseNotes/21.rst",
    "//libcxx/docs/Status/Cxx2cPapers.csv",
    "//libcxx/include/version",
    "//libcxx/test/std/language.support/support.limits/support.limits.general/algorithm.version.compile.pass.cpp",
    "//libcxx/test/std/language.support/support.limits/support.limits.general/utility.version.compile.pass.cpp",
    "//libcxx/test/std/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp",
    "//libcxx/utils/generate_feature_test_macro_components.py",
    "//llvm/utils/gn/secondary/lldb/tools/lldb-dap/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": []
}