#!/bin/bash
# ============================================================================
# DarkForge Linux — Phase 0, Chapter 6: Grep
# ============================================================================
# Purpose:  Cross-compile GNU grep (pattern matching).
# Inputs:   ${LFS}/sources/grep-3.12.tar.xz
# Outputs:  grep in ${LFS}/usr/bin/
# Ref:      LFS 13.0 §6.10
# ============================================================================

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

PACKAGE="grep"
VERSION="3.12"
SRCDIR="${LFS}/sources"

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

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

# Cross-compile cache overrides: grep 3.12 tries to run test binaries for
# strcasecmp and fnmatch. We know glibc provides correct implementations.
./configure \
    --prefix=/usr \
    --host="${LFS_TGT}" \
    --build="$(./build-aux/config.guess)" \
    gl_cv_func_strcasecmp_works=yes \
    gl_cv_func_fnmatch_gnu=yes

make
make DESTDIR="${LFS}" install

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