gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//flang-rt/.clang-tidy",
    "//flang-rt/CMakeLists.txt",
    "//flang-rt/CODE_OWNERS.TXT",
    "//flang-rt/LICENSE.TXT",
    "//flang-rt/README.md",
    "//flang-rt/cmake/config.h.cmake.in",
    "//flang-rt/cmake/modules/AddFlangRT.cmake",
    "//flang-rt/cmake/modules/AddFlangRTOffload.cmake",
    "//flang-rt/cmake/modules/GetToolchainDirs.cmake",
    "//flang-rt/examples/CMakeLists.txt",
    "//flang-rt/examples/ExternalHelloWorld/CMakeLists.txt",
    "//flang-rt/lib/CMakeLists.txt",
    "//flang-rt/lib/Testing/CMakeLists.txt",
    "//flang-rt/lib/cuda/CMakeLists.txt",
    "//flang-rt/lib/quadmath/CMakeLists.txt",
    "//flang-rt/lib/runtime/CMakeLists.txt",
    "//flang-rt/test/CMakeLists.txt",
    "//flang-rt/test/Driver/ctofortran.f90",
    "//flang-rt/test/Driver/exec.f90",
    "//flang-rt/test/NonGtestUnit/lit.cfg.py",
    "//flang-rt/test/NonGtestUnit/lit.site.cfg.py.in",
    "//flang-rt/test/Runtime/no-cpp-dep.c",
    "//flang-rt/test/Unit/lit.cfg.py",
    "//flang-rt/test/Unit/lit.site.cfg.py.in",
    "//flang-rt/test/lit.cfg.py",
    "//flang-rt/test/lit.site.cfg.py.in",
    "//flang-rt/unittests/CMakeLists.txt",
    "//flang-rt/unittests/Evaluate/CMakeLists.txt",
    "//flang-rt/unittests/Runtime/CMakeLists.txt",
    "//flang-rt/unittests/Runtime/CUDA/CMakeLists.txt",
    "//flang/CMakeLists.txt",
    "//flang/cmake/modules/FlangCommon.cmake",
    "//flang/docs/GettingStarted.md",
    "//flang/docs/ReleaseNotes.md",
    "//flang/test/lit.cfg.py",
    "//flang/test/lit.site.cfg.py.in",
    "//llvm/CMakeLists.txt",
    "//llvm/cmake/modules/LLVMExternalProjectUtils.cmake",
    "//llvm/projects/CMakeLists.txt",
    "//llvm/runtimes/CMakeLists.txt",
    "//runtimes/CMakeLists.txt"
  ],
  "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": []
}