From 1e4c08546aa0423639db9c629b18a17e4f6c5431 Mon Sep 17 00:00:00 2001
From: Phillip Tennen <phillip@axleos.com>
Date: Sun, 24 Mar 2024 22:24:52 +0000
Subject: [PATCH] [Newlib] Attempt to provide an errno symbol

---
 .github/workflows/main.yml | 2 +-
 scripts/newlib.patch       | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 597661dd2..457ce6d53 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -38,7 +38,7 @@ jobs:
             x86_64-toolchain
             axle-sysroot
             scripts/mkinitrd/target
-          key: libc-and-toolchain
+          key: libc-and-toolchain-cachebuster
 
       - name: Build libc and toolchain
         shell: bash
diff --git a/scripts/newlib.patch b/scripts/newlib.patch
index 365340a32..531f88b6e 100644
--- a/scripts/newlib.patch
+++ b/scripts/newlib.patch
@@ -119,6 +119,10 @@ index 0000000..c2926ca
 +#include <stdbool.h>
 +#include <stdint.h>
 +
++// Ref: https://sourceware.org/newlib/libc.html#Stubs
++#undef errno
++extern int errno;
++
 +#include "syscalls.h"
 +
 +// amc syscalls