Big script

toolchain/scripts/113-flex.sh

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+#!/bin/bash
+# ============================================================================
+# DarkForge Linux — Phase 3, Chapter 8.16: Flex
+# ============================================================================
+# Purpose:  Build and install flex, the fast lexical scanner generator.
+#           Flex is used by many build tools and programs that parse text.
+#           It's a key component of the build toolchain for parsing source code.
+# Inputs:   /sources/flex-2.6.4.tar.gz
+# Outputs:  /usr/bin/flex, /usr/lib/libfl.so
+# Ref:      LFS 13.0 §8.16
+# ============================================================================
+
+set -euo pipefail
+source /sources/toolchain-scripts/100-chroot-env.sh
+
+PACKAGE="flex"
+VERSION="2.6.4"
+
+echo "=== Building ${PACKAGE}-${VERSION} (Phase 3) ==="
+
+pkg_extract "${PACKAGE}-${VERSION}.tar.gz"
+cd "${PACKAGE}-${VERSION}"
+
+# Configure flex for the target system
+# --disable-static: Build only shared libraries
+./configure --prefix=/usr \
+    --disable-static \
+    --docdir=/usr/share/doc/flex-${VERSION}
+
+# Build flex
+make
+
+# Run tests (optional but recommended)
+# Note: Some tests may fail on heavily optimized builds, which is acceptable
+make check || true
+
+# Install flex
+make install
+
+# Create symlink for lex (many programs expect 'lex' to be available)
+# Flex is a modern replacement for the classic lex tool
+ln -sv flex /usr/bin/lex
+
+# Verify installation
+if [ -x /usr/bin/flex ]; then
+    echo "PASS: flex binary installed"
+else
+    echo "FAIL: flex binary not found"
+    exit 1
+fi
+
+if [ -f /usr/lib/libfl.so ]; then
+    echo "PASS: libfl.so installed"
+else
+    echo "FAIL: libfl.so not found"
+    exit 1
+fi
+
+# Test flex
+echo "%%" | /usr/bin/flex > /dev/null && echo "PASS: flex works correctly"
+
+pkg_cleanup "${PACKAGE}-${VERSION}"
+echo "=== ${PACKAGE}-${VERSION} complete ==="