gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//flang/lib/Optimizer/OpenACC/FIROpenACCTypeInterfaces.cpp",
    "//flang/test/Fir/OpenACC/openacc-type-categories-class.f90",
    "//flang/test/lib/OpenACC/TestOpenACCInterfaces.cpp",
    "//mlir/examples/toy/Ch2/include/toy/Ops.td",
    "//mlir/examples/toy/Ch3/include/toy/Ops.td",
    "//mlir/examples/toy/Ch4/include/toy/Ops.td",
    "//mlir/examples/toy/Ch5/include/toy/Ops.td",
    "//mlir/examples/toy/Ch6/include/toy/Ops.td",
    "//mlir/examples/toy/Ch7/include/toy/Ops.td"
  ],
  "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": []
}