Initial commit: DarkForge Linux — Phases 0-12

Complete from-scratch Linux distribution targeting AMD Ryzen 9 9950X3D +
NVIDIA RTX 5090 on ASUS ROG CROSSHAIR X870E HERO.

Deliverables:
- dpack: custom package manager in Rust (3,800 lines)
  - TOML package parser, dependency resolver, build sandbox
  - CRUX Pkgfile and Gentoo ebuild converters
  - Shared library conflict detection
- 124 package definitions across 4 repos (core/extra/desktop/gaming)
- 34 toolchain bootstrap scripts (LFS 13.0 adapted for Zen 5)
- Linux 6.19.8 kernel config (hardware-specific, fully commented)
- SysVinit init system with rc.d service scripts
- Live ISO builder (UEFI-only, squashfs+xorriso)
- Interactive installer (GPT partitioning, EFISTUB boot)
- Integration test checklist (docs/TESTING.md)

No systemd. No bootloader. No display manager.
Kernel boots via EFISTUB → auto-login → dwl Wayland compositor.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

toolchain/scripts/022-gcc-pass2.sh

@@ -0,0 +1,89 @@
+#!/bin/bash
+# ============================================================================
+# DarkForge Linux — Phase 0, Chapter 6: GCC Pass 2
+# ============================================================================
+# Purpose:  Rebuild GCC with the temporary toolchain. This produces a
+#           compiler that runs on the target and generates code for the target.
+#           Unlike Pass 1, this includes libstdc++, threading, and shared libs.
+#           Hardware-specific flags (-march=znver5) are STILL not applied here;
+#           they come when we build the final native GCC in the chroot.
+# Inputs:   ${LFS}/sources/gcc-15.2.0.tar.xz + mpfr, gmp, mpc
+# Outputs:  Full GCC in ${LFS}/usr/
+# Assumes:  All Chapter 5 + Chapter 6 packages (006-021) complete
+# Ref:      LFS 13.0 §6.18
+# ============================================================================
+
+set -euo pipefail
+source "${LFS}/sources/darkforge-env.sh"
+
+PACKAGE="gcc"
+VERSION="15.2.0"
+SRCDIR="${LFS}/sources"
+
+echo "=== Building ${PACKAGE}-${VERSION} (Pass 2) ==="
+
+cd "${SRCDIR}"
+tar -xf "${PACKAGE}-${VERSION}.tar.xz"
+cd "${PACKAGE}-${VERSION}"
+
+# Extract and link GCC's arithmetic library dependencies
+tar -xf ../mpfr-4.2.2.tar.xz
+mv -v mpfr-4.2.2 mpfr
+tar -xf ../gmp-6.3.0.tar.xz
+mv -v gmp-6.3.0 gmp
+tar -xf ../mpc-1.3.1.tar.gz
+mv -v mpc-1.3.1 mpc
+
+# Fix lib64 directory naming (same as Pass 1)
+case $(uname -m) in
+    x86_64)
+        sed -e '/m64=/s/lib64/lib/' -i.orig gcc/config/i386/t-linux64
+        ;;
+esac
+
+# Override the default build rule for libgcc and libstdc++ headers
+# to use our target-specific header directory
+sed '/thread_header =/s/@.*@/gthr-posix.h/' \
+    -i libgcc/Makefile.in libstdc++-v3/include/Makefile.in
+
+mkdir -v build
+cd build
+
+# Configure GCC Pass 2
+# Key differences from Pass 1:
+# --with-build-sysroot=$LFS: use target sysroot during build
+# --enable-default-pie/ssp: security hardening
+# --disable-bootstrap: skip the 3-stage bootstrap (not building natively yet)
+../configure \
+    --build="$(../config.guess)" \
+    --host="${LFS_TGT}" \
+    --target="${LFS_TGT}" \
+    LDFLAGS_FOR_TARGET=-L"${PWD}/${LFS_TGT}/libgcc" \
+    --prefix=/usr \
+    --with-build-sysroot="${LFS}" \
+    --enable-default-pie \
+    --enable-default-ssp \
+    --disable-nls \
+    --disable-multilib \
+    --disable-libatomic \
+    --disable-libgomp \
+    --disable-libquadmath \
+    --disable-libsanitizer \
+    --disable-libssp \
+    --disable-libvtv \
+    --enable-languages=c,c++
+
+make
+make DESTDIR="${LFS}" install
+
+# Create cc symlink (many build systems expect 'cc' to exist)
+ln -sfv gcc "${LFS}/usr/bin/cc"
+
+# Cleanup
+cd "${SRCDIR}"
+rm -rf "${PACKAGE}-${VERSION}"
+
+echo "=== ${PACKAGE}-${VERSION} Pass 2 complete ==="
+echo ""
+echo ">>> Cross-compilation phase (Chapters 5+6) COMPLETE."
+echo ">>> Next: Enter chroot environment (Chapter 7 scripts)."