__DECLARE_FLEX_ARRAY(9)

💖 __DECLARE_FLEX_ARRAY(9) 💖

okay so bestie, this is the Kernel API Manual page for __DECLARE_FLEX_ARRAY, and it's lowkey iconic for one very specific flexible-array-in-a-union situation. Let's get into it. 🫶

🌸 NAME 🌸

__DECLARE_FLEX_ARRAY — Declare a flexible array usable in a union. ✨

✨ SYNOPSIS ✨

__DECLARE_FLEX_ARRAY (TYPE , NAME );

🎀 ARGUMENTS 🎀

• TYPE — the type of each flexible array element. 💅
• NAME — the name of the flexible array member. 🎀

🦋 DESCRIPTION 🦋

okay so here's the tea: to have a flexible array member in a union, or alone in a struct, it needs to be wrapped in an anonymous struct with at least 1 named member. The plot twist? That named member can be empty. literally that's the whole vibe. 😭✨

👑 SEE ALSO 👑

• Kernel file ./tools/include/uapi/linux/stddef.h 🐧
• __struct_group(9) 🫶

later bestie 💖 — this page is from ./tools/include/uapi/linux, dated October 2026, and it's the __DECLARE_FLEX_ARRAY(9) one. periodt. ✨