Initial commit: SUB-OS 64-Bit Production Monolithic Operating System with LazyBox userland suite

tools/build-cross-compiler.sh

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+#!/bin/bash
+# =============================================================================
+# SUB-OS Cross-Compiler Build Script
+# Builds x86_64-elf-gcc and x86_64-elf-binutils from source
+# =============================================================================
+
+set -e
+
+# Configuration
+export TARGET=x86_64-elf
+export PREFIX="/usr/local/cross"
+export PATH="$PREFIX/bin:$PATH"
+
+BINUTILS_VERSION="2.42"
+GCC_VERSION="13.3.0"
+
+BUILD_DIR="/tmp/cross-compiler-build"
+JOBS=$(nproc)
+
+echo "============================================"
+echo "  Building x86_64-elf Cross-Compiler"
+echo "============================================"
+echo "  Target:   $TARGET"
+echo "  Prefix:   $PREFIX"
+echo "  Binutils: $BINUTILS_VERSION"
+echo "  GCC:      $GCC_VERSION"
+echo "  Jobs:     $JOBS"
+echo "============================================"
+
+# Create directories
+sudo mkdir -p "$PREFIX"
+mkdir -p "$BUILD_DIR"
+cd "$BUILD_DIR"
+
+# ---- Step 1: Download sources ----
+echo ""
+echo "[1/4] Downloading sources..."
+
+if [ ! -f "binutils-${BINUTILS_VERSION}.tar.xz" ]; then
+    curl -LO "https://ftp.gnu.org/gnu/binutils/binutils-${BINUTILS_VERSION}.tar.xz"
+fi
+
+if [ ! -f "gcc-${GCC_VERSION}.tar.xz" ]; then
+    curl -LO "https://ftp.gnu.org/gnu/gcc/gcc-${GCC_VERSION}/gcc-${GCC_VERSION}.tar.xz"
+fi
+
+# ---- Step 2: Extract sources ----
+echo ""
+echo "[2/4] Extracting sources..."
+
+if [ ! -d "binutils-${BINUTILS_VERSION}" ]; then
+    tar xf "binutils-${BINUTILS_VERSION}.tar.xz"
+fi
+
+if [ ! -d "gcc-${GCC_VERSION}" ]; then
+    tar xf "gcc-${GCC_VERSION}.tar.xz"
+fi
+
+# ---- Step 3: Build Binutils ----
+echo ""
+echo "[3/4] Building binutils for ${TARGET}..."
+
+mkdir -p build-binutils
+cd build-binutils
+
+../binutils-${BINUTILS_VERSION}/configure \
+    --target=$TARGET \
+    --prefix="$PREFIX" \
+    --with-sysroot \
+    --disable-nls \
+    --disable-werror
+
+make -j$JOBS
+sudo make install
+
+cd "$BUILD_DIR"
+
+# ---- Step 4: Build GCC ----
+echo ""
+echo "[4/4] Building GCC for ${TARGET}..."
+
+mkdir -p build-gcc
+cd build-gcc
+
+../gcc-${GCC_VERSION}/configure \
+    --target=$TARGET \
+    --prefix="$PREFIX" \
+    --disable-nls \
+    --enable-languages=c \
+    --without-headers
+
+make -j$JOBS all-gcc
+make -j$JOBS all-target-libgcc
+sudo make install-gcc
+sudo make install-target-libgcc
+
+cd "$BUILD_DIR"
+
+# ---- Verify ----
+echo ""
+echo "============================================"
+echo "  Cross-Compiler Build Complete!"
+echo "============================================"
+echo ""
+$PREFIX/bin/$TARGET-gcc --version
+$PREFIX/bin/$TARGET-ld --version | head -1
+echo ""
+echo "Installed to: $PREFIX/bin/"
+echo ""
+echo "Add to your PATH:"
+echo "  export PATH=\"$PREFIX/bin:\$PATH\""
+echo ""
+echo "Or add to ~/.bashrc for persistence:"
+echo "  echo 'export PATH=\"$PREFIX/bin:\$PATH\"' >> ~/.bashrc"
+echo "============================================"

tools/setup.sh

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+#!/bin/bash
+
+echo "Setting up SUB-OS build environment..."
+
+if [ -f /etc/os-release ]; then
+    . /etc/os-release
+    OS=$ID
+else
+    echo "Cannot detect OS. Please manually install dependencies."
+    exit 1
+fi
+
+case $OS in
+    ubuntu|debian)
+        echo "Detected Debian/Ubuntu-based OS."
+        sudo apt-get update
+        sudo apt-get install -y nasm gcc binutils make qemu-system-x86
+        ;;
+    fedora)
+        echo "Detected Fedora."
+        sudo dnf install -y nasm gcc binutils make qemu-system-x86
+        ;;
+    arch)
+        echo "Detected Arch Linux."
+        sudo pacman -Sy --noconfirm nasm gcc binutils make qemu-system-x86
+        ;;
+    *)
+        echo "Unsupported OS: $OS. Please install: nasm, gcc, binutils, make, qemu-system-x86."
+        ;;
+esac
+
+if ! command -v x86_64-elf-gcc &> /dev/null; then
+    echo ""
+    echo "WARNING: x86_64-elf-gcc (cross-compiler) not found in PATH."
+    echo "The Makefile will fallback to the default gcc."
+    echo "For the best results, it is highly recommended to build an x86_64-elf GCC cross-compiler."
+    echo "Instructions to build a cross-compiler: https://wiki.osdev.org/GCC_Cross-Compiler"
+fi
+
+echo "Setup script finished!"