4 ms·

Implicit declarations are a classic! Current GCC and clang error on them by default now, but that's a rather recent change.

• uecker 2mo ago
  GCC warns by default since version 5, released more than a decade ago.
  • chasil 2mo ago
    My production binary was built on Oracle Linux 5, with gcc 4.1.2.
    • uecker 2mo ago
      That version would at least warn with -Wall.