#!/bin/bash
set -e

build_dir=$1
source_dir=$(pwd)

# Create build directory in the specified location
mkdir -p "${build_dir}"

# Change to the glibc source directory
cd sources/glibc-2.42

# Apply the FHS patch to make programs store runtime data in FHS-compliant locations
echo "Applying FHS patch..."
patch -Np1 -i ../../sources/glibc-2.42-fhs-1.patch

# Create a dedicated build directory as recommended by Glibc documentation
echo "Creating build directory..."
mkdir -v "${build_dir}/build"

# Ensure that ldconfig and sln utilities will be installed into /usr/sbin
echo "rootsbindir=/usr/sbin" > "${build_dir}/build/configparms"

# Change to the build directory
cd "${build_dir}/build"

# Prepare Glibc for compilation
echo "Configuring glibc..."
${source_dir}/sources/glibc-2.42/configure --prefix=/usr \
             --disable-werror                           \
             --enable-kernel=4.19                       \
             --enable-stack-protector=strong            \
             --disable-nscd                             \
             libc_cv_slibdir=/usr/lib

# Compile the package
echo "Building glibc..."
make

echo "Build complete."