From 4a73b8cbb3cf1a7047da445790d39eef8474c652 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alex=20R=C3=B8nne=20Petersen?= <alex@alexrp.com>
Date: Thu, 28 Nov 2024 18:59:26 +0100
Subject: [PATCH] std.builtin: Add VaListXtensa.

---
 lib/std/builtin.zig | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/std/builtin.zig b/lib/std/builtin.zig
index ed18965e50..52fe2c5e23 100644
--- a/lib/std/builtin.zig
+++ b/lib/std/builtin.zig
@@ -892,6 +892,14 @@ pub const VaListX86_64 = extern struct {
     reg_save_area: *anyopaque,
 };
 
+/// This data structure is used by the Zig language code generation and
+/// therefore must be kept in sync with the compiler implementation.
+pub const VaListXtensa = extern struct {
+    __va_stk: *c_int,
+    __va_reg: *c_int,
+    __va_ndx: c_int,
+};
+
 /// This data structure is used by the Zig language code generation and
 /// therefore must be kept in sync with the compiler implementation.
 pub const VaList = switch (builtin.cpu.arch) {
@@ -925,6 +933,7 @@ pub const VaList = switch (builtin.cpu.arch) {
         .windows => @compileError("disabled due to miscompilations"), // *u8,
         else => VaListX86_64,
     },
+    .xtensa => VaListXtensa,
     else => @compileError("VaList not supported for this target yet"),
 };