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/Status/Cxx23.rst",
    "//libcxx/docs/Status/Cxx23Papers.csv",
    "//libcxx/include/CMakeLists.txt",
    "//libcxx/include/__algorithm/out_value_result.h",
    "//libcxx/include/__numeric/ranges_iota.h",
    "//libcxx/include/algorithm",
    "//libcxx/include/module.modulemap",
    "//libcxx/include/numeric",
    "//libcxx/include/version",
    "//libcxx/modules/std/algorithm.inc",
    "//libcxx/modules/std/numeric.inc",
    "//libcxx/test/std/algorithms/algorithms.results/no_unique_address.compile.pass.cpp",
    "//libcxx/test/std/algorithms/algorithms.results/out_value_result.pass.cpp",
    "//libcxx/test/std/algorithms/ranges_result_alias_declarations.compile.pass.cpp",
    "//libcxx/test/std/algorithms/ranges_robust_against_dangling.pass.cpp",
    "//libcxx/test/std/algorithms/ranges_robust_against_proxy_iterators.pass.cpp",
    "//libcxx/test/std/language.support/support.limits/support.limits.general/numeric.version.compile.pass.cpp",
    "//libcxx/test/std/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp",
    "//libcxx/test/std/numerics/numeric.ops/numeric.iota/ranges.iota.pass.cpp",
    "//libcxx/test/support/test_iterators.h",
    "//libcxx/utils/generate_feature_test_macro_components.py",
    "//llvm/utils/gn/secondary/libcxx/include/BUILD.gn",
    "//llvm/utils/gn/secondary/llvm/unittests/CodeGen/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