#!/bin/bash
# ============================================================================
# DarkForge Linux — Phase 0, Chapter 6: M4
# ============================================================================
# Purpose:  Cross-compile the M4 macro processor. Required by Bison and
#           other packages that process m4 macros.
# Inputs:   ${LFS}/sources/m4-1.4.20.tar.xz
# Outputs:  m4 binary in ${LFS}/usr/
# Assumes:  Cross-toolchain (Ch.5) complete
# Ref:      LFS 13.0 §6.2
# ============================================================================

set -euo pipefail
source "${LFS}/sources/darkforge-env.sh"

PACKAGE="m4"
VERSION="1.4.20"
SRCDIR="${LFS}/sources"

echo "=== Building ${PACKAGE}-${VERSION} (Temporary Tool) ==="

cd "${SRCDIR}"
tar -xf "${PACKAGE}-${VERSION}.tar.xz"
cd "${PACKAGE}-${VERSION}"

./configure \
    --prefix=/usr \
    --host="${LFS_TGT}" \
    --build="$(build-aux/config.guess)"

make
make DESTDIR="${LFS}" install

cd "${SRCDIR}"
rm -rf "${PACKAGE}-${VERSION}"
echo "=== ${PACKAGE}-${VERSION} complete ==="