gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libcxx/include/CMakeLists.txt",
    "//libcxx/include/__condition_variable/condition_variable.h",
    "//libcxx/include/__mutex/unique_lock.h",
    "//libcxx/include/__system_error/system_error.h",
    "//libcxx/include/__system_error/throw_system_error.h",
    "//libcxx/include/__thread/thread.h",
    "//libcxx/include/module.modulemap",
    "//libcxx/include/print",
    "//libcxx/include/shared_mutex",
    "//libcxx/src/chrono.cpp",
    "//libcxx/src/filesystem/filesystem_clock.cpp",
    "//libcxx/src/random.cpp",
    "//libcxx/src/system_error.cpp",
    "//libcxx/test/libcxx/transitive_includes/cxx23.csv",
    "//libcxx/test/libcxx/transitive_includes/cxx26.csv",
    "//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",
    "//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