#!/bin/bash
# ============================================================================
# DarkForge Linux — Phase 3, Chapter 8.22: GMP (GNU Multiple Precision)
# ============================================================================
# Purpose:  Build GMP, a library for arbitrary-precision arithmetic.
#           Required by GCC for floating-point operations in the compiler.
# Inputs:   /sources/gmp-6.3.0.tar.xz
# Outputs:  GMP library in /usr/lib, headers in /usr/include
# Ref:      LFS 13.0 §8.22
# ============================================================================

set -euo pipefail
source /sources/toolchain-scripts/100-chroot-env.sh

PACKAGE="gmp"
VERSION="6.3.0"

echo "=== Building ${PACKAGE}-${VERSION} (Phase 3) ==="

pkg_extract "${PACKAGE}-${VERSION}.tar.xz"
cd "${PACKAGE}-${VERSION}"

# Build GMP with optimization for x86_64 (znver5 will inherit from CFLAGS)
# --enable-cxx: build C++ bindings for GCC
./configure \
    --prefix=/usr \
    --enable-cxx \
    --disable-static

make
make html
make install
make install-html

# Verify installation
echo "GMP version: $(/usr/bin/gmp-config --version 2>/dev/null || echo 'GMP installed')"

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