avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/build.sh

@@ -0,0 +1,102 @@
+#!/bin/bash
+
+# --- Configuration ---
+ARCH="arm"
+CROSS_COMPILE="arm-none-eabi-"
+DEFCONFIG="jetson-tk1_defconfig"
+FDT_HEADER="/usr/include/libfdt.h"
+FDT_ENV_HEADER="/usr/include/libfdt_env.h"
+CHECK_SCRIPT="scripts/kconfig/lxdialog/check-lxdialog.sh"
+
+# Flags needed for modern GCC and Ncurses paths
+export HOSTCFLAGS="-fcommon -I/usr/include/ncursesw"
+
+# --- Helper Functions ---
+
+# Safety: Restore headers if script exits or crashes
+cleanup() {
+  if [ -f "${FDT_HEADER}.bak" ]; then
+    echo "--> Restoring system headers..."
+    sudo mv "${FDT_HEADER}.bak" "$FDT_HEADER"
+    sudo mv "${FDT_ENV_HEADER}.bak" "$FDT_ENV_HEADER"
+  fi
+}
+trap cleanup EXIT
+
+# --- Commands ---
+
+do_setup() {
+  echo "--> Installing dependencies (Arch/CachyOS)..."
+  sudo pacman -S --needed base-devel ncurses lib32-ncurses pkgconf bc arm-none-eabi-gcc arm-none-eabi-binutils
+
+  # Fix ncurses directory symlink
+  if [ ! -d "/usr/include/ncurses" ]; then
+    echo "--> Creating ncurses header symlink..."
+    sudo ln -s /usr/include/ncursesw /usr/include/ncurses
+  fi
+
+  # cut DTC version check
+  if [ -f "scripts/dtc-version.sh" ]; then
+    echo "--> Neutralizing DTC version check..."
+    echo -e '#!/bin/sh\necho "0104"\nexit 0' >scripts/dtc-version.sh
+    chmod +x scripts/dtc-version.sh
+  fi
+
+  #fix lxdialog for modern GCC
+  if [ -f "$CHECK_SCRIPT" ]; then
+    echo "--> Patching $CHECK_SCRIPT for modern GCC..."
+    sed -i 's/main() {}/int main() { return 0; }/' "$CHECK_SCRIPT"
+  else
+    echo "!! Warning: Could not find $CHECK_SCRIPT. Are you in the root directory?"
+  fi
+  echo "--> Setup complete."
+}
+
+do_clear() {
+  echo "--> Cleaning build artifacts..."
+  make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE distclean
+}
+
+do_config() {
+  echo "--> Configuring with $DEFCONFIG..."
+  make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE $DEFCONFIG
+}
+
+do_menuconfig() {
+  echo "--> Launching menuconfig..."
+  make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE menuconfig
+}
+
+do_build() {
+  # Move headers to prevent conflict with U-Boot's internal libfdt
+  echo "--> Temporarily hiding system FDT headers..."
+  [ -f "$FDT_HEADER" ] && sudo mv "$FDT_HEADER" "${FDT_HEADER}.bak"
+  [ -f "$FDT_ENV_HEADER" ] && sudo mv "$FDT_ENV_HEADER" "${FDT_ENV_HEADER}.bak"
+
+  echo "--> Starting build..."
+  make ARCH=$ARCH CROSS_COMPILE=$CROSS_COMPILE -j$(nproc)
+}
+
+# --- Argument Parser ---
+
+case "$1" in
+setup)
+  do_setup
+  ;;
+clear)
+  do_clear
+  ;;
+default_config)
+  do_config
+  ;;
+menuconfig)
+  do_menuconfig
+  ;;
+"")
+  do_build
+  ;;
+*)
+  echo "Usage: $0 {setup|clear|default_config|menuconfig| (no args for build)}"
+  exit 1
+  ;;
+esac