gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libc/src/stdio/gpu/CMakeLists.txt",
    "//libc/src/stdio/gpu/clearerr.cpp",
    "//libc/src/stdio/gpu/fclose.cpp",
    "//libc/src/stdio/gpu/feof.cpp",
    "//libc/src/stdio/gpu/ferror.cpp",
    "//libc/src/stdio/gpu/fflush.cpp",
    "//libc/src/stdio/gpu/fgetc.cpp",
    "//libc/src/stdio/gpu/fgets.cpp",
    "//libc/src/stdio/gpu/file.h",
    "//libc/src/stdio/gpu/fopen.cpp",
    "//libc/src/stdio/gpu/fprintf.cpp",
    "//libc/src/stdio/gpu/fputc.cpp",
    "//libc/src/stdio/gpu/fputs.cpp",
    "//libc/src/stdio/gpu/fread.cpp",
    "//libc/src/stdio/gpu/fseek.cpp",
    "//libc/src/stdio/gpu/ftell.cpp",
    "//libc/src/stdio/gpu/fwrite.cpp",
    "//libc/src/stdio/gpu/getc.cpp",
    "//libc/src/stdio/gpu/getchar.cpp",
    "//libc/src/stdio/gpu/printf.cpp",
    "//libc/src/stdio/gpu/putc.cpp",
    "//libc/src/stdio/gpu/putchar.cpp",
    "//libc/src/stdio/gpu/puts.cpp",
    "//libc/src/stdio/gpu/remove.cpp",
    "//libc/src/stdio/gpu/rename.cpp",
    "//libc/src/stdio/gpu/stderr.cpp",
    "//libc/src/stdio/gpu/stdin.cpp",
    "//libc/src/stdio/gpu/stdout.cpp",
    "//libc/src/stdio/gpu/ungetc.cpp",
    "//libc/src/stdio/gpu/vfprintf.cpp",
    "//libc/src/stdio/gpu/vfprintf_utils.h",
    "//libc/src/stdio/gpu/vprintf.cpp"
  ],
  "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