From 586c8f65f2d0c0e1f73aadd0aa8d850aa653bddd Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Mon, 28 Sep 2026 13:30:22 -0700
Subject: Support extern C ver direct updates

FIx minor RISC encodings.
---
 chapter25/src/main/c/simple_crt.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'chapter25/src/main/c')

diff --git a/chapter25/src/main/c/simple_crt.c b/chapter25/src/main/c/simple_crt.c
index b79e6f88..8656a3cc 100644
--- a/chapter25/src/main/c/simple_crt.c
+++ b/chapter25/src/main/c/simple_crt.c
@@ -1,6 +1,10 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
+#include <errno.h>
+
+// errno may be thread-local or a macro calling a platform accessor.
+int32_t simple_errno(void) { return errno; }
 
 // Native process arguments converted to ordinary Simple array layouts.
 // The outer array is mutable; every contained byte array is published as
-- 
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