From 612b217b90a52ebd1c88218b25584fac82da62c0 Mon Sep 17 00:00:00 2001
From: liamcottle <liam@liamcottle.com>
Date: Wed, 19 Aug 2026 12:07:29 +1200
Subject: [PATCH] updated gcc toolchain for nrf52 boards

---
 platformio.ini   | 1 +
 src/armstubs.cpp | 9 +++++++++
 2 files changed, 10 insertions(+)
 create mode 100644 src/armstubs.cpp

diff --git a/platformio.ini b/platformio.ini
index e78124a40..ee502473c 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -86,6 +86,7 @@ platform_packages =
   ; https://github.com/meshcore-dev/MeshCore/pull/1177
   ; https://github.com/meshcore-dev/MeshCore/pull/1295
   framework-arduinoadafruitnrf52 @ https://github.com/meshcore-dev/Adafruit_nRF52_Arduino#d541301
+  platformio/toolchain-gccarmnoneeabi@^1.140201.0
 extra_scripts = create-uf2.py
 build_flags = ${arduino_base.build_flags}
   -D NRF52_PLATFORM
diff --git a/src/armstubs.cpp b/src/armstubs.cpp
new file mode 100644
index 000000000..30da40ecf
--- /dev/null
+++ b/src/armstubs.cpp
@@ -0,0 +1,9 @@
+// https://github.com/meshcore-dev/MeshCore/issues/2469
+// armstubs.cpp exists to silence warnings introduced after upgrading platformio/toolchain-gccarmnoneeabi
+extern "C" __attribute__((weak)) int _close(int fd)  { return -1; }
+extern "C" __attribute__((weak)) int _lseek(int fd, int offset, int whence) { return 0; }
+extern "C" __attribute__((weak)) int _read(int fd, char *buf, int len)  { return 0; }
+extern "C" __attribute__((weak)) int _fstat(int fd, struct stat *st) { return 0; }
+extern "C" __attribute__((weak)) int _isatty(int fd) { return 1; }
+extern "C" __attribute__((weak)) int _getpid(void) { return 1; }
+extern "C" __attribute__((weak)) int _kill(int pid, int sig) { return -1; }