0ad/libraries/build-macos-libs.sh

#!/bin/bash
#
# Script for acquiring and building macOS dependencies for 0 A.D.
#
# The script checks whether a source tarball exists for each
# dependency, if not it will download the correct version from
# the project's website, then it removes previous build files,
# extracts the tarball, configures and builds the lib. The script
# should die on any errors to ease troubleshooting.
#
# make install is used to copy the compiled libs to each specific
# directory and also the config tools (e.g. sdl-config). Because
# of this, OS X developers must run this script at least once,
# to configure the correct lib directories. It must be run again
# if the libraries are moved.
#
# Building against an SDK is an option, though not required,
# as not all build environments contain the Developer SDKs
# (Xcode does, but the Command Line Tools package does not)
#
# --------------------------------------------------------------
# Library versions for ease of updating:
ZLIB_VERSION="zlib-1.2.11"
CURL_VERSION="curl-7.71.0"
ICONV_VERSION="libiconv-1.16"
XML2_VERSION="libxml2-2.9.10"
SDL2_VERSION="SDL2-2.0.18"
# NOTE: remember to also update LIB_URL below when changing version
BOOST_VERSION="boost_1_76_0"
# NOTE: remember to also update LIB_URL below when changing version
WXWIDGETS_VERSION="wxWidgets-3.1.4"
# libpng was included as part of X11 but that's removed from Mountain Lion
# (also the Snow Leopard version was ancient 1.2)
PNG_VERSION="libpng-1.6.36"
FREETYPE_VERSION="freetype-2.10.4"
OGG_VERSION="libogg-1.3.3"
VORBIS_VERSION="libvorbis-1.3.7"
# gloox requires GnuTLS, GnuTLS requires Nettle and GMP
GMP_VERSION="gmp-6.2.1"
NETTLE_VERSION="nettle-3.9"
# NOTE: remember to also update LIB_URL below when changing version
GLOOX_VERSION="gloox-1.0.24"
GNUTLS_VERSION="gnutls-3.8.0"
# OS X only includes part of ICU, and only the dylib
# NOTE: remember to also update LIB_URL below when changing version
ICU_VERSION="icu4c-69_1"
ENET_VERSION="enet-1.3.17"
MINIUPNPC_VERSION="miniupnpc-2.2.2"
SODIUM_VERSION="libsodium-1.0.18"
FMT_VERSION="7.1.3"
MOLTENVK_VERSION="1.2.2"
# --------------------------------------------------------------
# Bundled with the game:
# * SpiderMonkey
# * NVTT
# * FCollada
# --------------------------------------------------------------
source_svnrev="28207"
# --------------------------------------------------------------
# Provided by OS X:
# * OpenAL
# * OpenGL
# --------------------------------------------------------------

export CC="${CC:="clang"}" CXX="${CXX:="clang++"}"
export MIN_OSX_VERSION="${MIN_OSX_VERSION:="10.12"}"
export ARCH="${ARCH:=""}"

# The various libs offer inconsistent configure options, some allow
# setting sysroot and OS X-specific options, others don't. Adding to
# the confusion, Apple moved /Developer/SDKs into the Xcode app bundle
# so the path can't be guessed by clever build tools (like Boost.Build).
# Sometimes configure gets it wrong anyway, especially on cross compiles.
# This is why we prefer using (OBJ)CFLAGS, (OBJ)CXXFLAGS, and LDFLAGS.

# Check if SYSROOT is set and not empty
if [ -n "$SYSROOT" ]; then
	C_FLAGS="-isysroot $SYSROOT"
	LDFLAGS="$LDFLAGS -Wl,-syslibroot,$SYSROOT"
fi
# Check if MIN_OSX_VERSION is set and not empty
if [ -n "$MIN_OSX_VERSION" ]; then
	C_FLAGS="$C_FLAGS -mmacosx-version-min=$MIN_OSX_VERSION"
	# clang and llvm-gcc look at mmacosx-version-min to determine link target
	# and CRT version, and use it to set the macosx_version_min linker flag
	LDFLAGS="$LDFLAGS -mmacosx-version-min=$MIN_OSX_VERSION"
fi

CFLAGS="$CFLAGS $C_FLAGS -fvisibility=hidden"
CXXFLAGS="$CXXFLAGS $C_FLAGS -stdlib=libc++ -std=c++17"
OBJCFLAGS="$OBJCFLAGS $C_FLAGS"
OBJCXXFLAGS="$OBJCXXFLAGS $C_FLAGS"

# Force x86_64 architecture on MacOS for now.
# NB: annoyingly, this is rather unstandardised. Some libs expect -arch, others different things.
# Further: wxWidgets uses its own system and actually fails to compile with arch arguments.
ARCHLESS_CFLAGS=$CFLAGS
ARCHLESS_CXXFLAGS=$CXXFLAGS
ARCHLESS_LDFLAGS="$LDFLAGS -stdlib=libc++"

# If ARCH isn't set, select either x86_64 or arm64
if [ -z "${ARCH}" ]; then
	ARCH=$(uname -m)
fi
if [ "$ARCH" = "arm64" ]; then
	# Some libs want this passed to configure for cross compilation.
	HOST_PLATFORM="--host=aarch64-apple-darwin"
else
	CXXFLAGS="$CXXFLAGS -msse4.1"
	# Some libs want this passed to configure for cross compilation.
	HOST_PLATFORM="--host=x86_64-apple-darwin"
fi

CFLAGS="$CFLAGS -arch $ARCH"
CXXFLAGS="$CXXFLAGS -arch $ARCH"

LDFLAGS="$LDFLAGS -arch $ARCH"

# CMake doesn't seem to pick up on architecture with CFLAGS only
CMAKE_FLAGS="-DCMAKE_OSX_ARCHITECTURES=$ARCH -DCMAKE_OSX_DEPLOYMENT_TARGET=$MIN_OSX_VERSION"

JOBS=${JOBS:="-j2"}

set -e

die()
{
	echo ERROR: "$*"
	exit 1
}

# $1 base url for download
# $2 target file name
download_lib()
{
	if [ ! -e "$2" ]; then
		echo "Downloading $2"
		curl -fLo "$2" "$1$2" || die "Download of $1$2 failed"
	fi
}

already_built()
{
	echo "Skipping - already built (use --force-rebuild to override)"
}

# Check that we're actually on macOS
if [ "$(uname -s)" != "Darwin" ]; then
	die "This script is intended for macOS only"
fi

# Parse command-line options:
force_rebuild=false

for i in "$@"; do
	case $i in
		--force-rebuild) force_rebuild=true ;;
		-j*) JOBS=$i ;;
	esac
done

cd "$(dirname "$0")" # Now in libraries/ (where we assume this script resides)
mkdir -p macos
cd macos

# Create a location to create copies of dependencies' *.pc files, so they can be found by pkg-config
PC_PATH="$(pwd)/pkgconfig/"
if [ $force_rebuild = "true" ]; then
	rm -rf "$PC_PATH"
fi
mkdir -p "$PC_PATH"

# --------------------------------------------------------------
echo "Building zlib..."

LIB_VERSION="${ZLIB_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.gz"
LIB_DIRECTORY=$LIB_VERSION
LIB_URL="https://zlib.net/fossils/"

mkdir -p zlib
pushd zlib >/dev/null

ZLIB_DIR="$(pwd)"

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY include lib share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	# patch zlib's configure script to use our CFLAGS and LDFLAGS
	(patch -Np0 -i ../../../macos-patches/zlib_flags.diff &&
		CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" \
			./configure --prefix="$ZLIB_DIR" \
			--static &&
		make "${JOBS}" && make install) || die "zlib build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building libcurl..."

LIB_VERSION="${CURL_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.bz2"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="http://curl.haxx.se/download/"

mkdir -p libcurl
pushd libcurl >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	(./configure CFLAGS="$CFLAGS" \
		LDFLAGS="$LDFLAGS" \
		--prefix="$INSTALL_DIR" \
		--enable-ipv6 \
		--with-darwinssl \
		--without-gssapi \
		--without-libmetalink \
		--without-libpsl \
		--without-librtmp \
		--without-libssh2 \
		--without-nghttp2 \
		--without-nss \
		--without-polarssl \
		--without-ssl \
		--without-gnutls \
		--without-brotli \
		--without-cyassl \
		--without-winssl \
		--without-mbedtls \
		--without-wolfssl \
		--without-spnego \
		--disable-ares \
		--disable-ldap \
		--disable-ldaps \
		--without-libidn2 \
		--with-zlib="${ZLIB_DIR}" \
		--enable-shared=no &&
		make "${JOBS}" && make install) || die "libcurl build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building libiconv..."

LIB_VERSION="${ICONV_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.gz"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="http://ftp.gnu.org/pub/gnu/libiconv/"

mkdir -p iconv
pushd iconv >/dev/null

ICONV_DIR="$(pwd)"

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	(./configure CFLAGS="$CFLAGS" \
		LDFLAGS="$LDFLAGS" \
		--prefix="$ICONV_DIR" \
		--without-libiconv-prefix \
		--without-libintl-prefix \
		--disable-nls \
		--enable-shared=no &&
		make "${JOBS}" && make install) || die "libiconv build failed"
	popd
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building libxml2..."

LIB_VERSION="${XML2_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.gz"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="ftp://xmlsoft.org/libxml2/"

mkdir -p libxml2
pushd libxml2 >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	(./configure CFLAGS="$CFLAGS" \
		LDFLAGS="$LDFLAGS" \
		--prefix="$INSTALL_DIR" \
		--without-lzma \
		--without-python \
		--with-iconv="${ICONV_DIR}" \
		--with-zlib="${ZLIB_DIR}" \
		--enable-shared=no &&
		make "${JOBS}" && make install) || die "libxml2 build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------

echo "Building SDL2..."

LIB_VERSION="${SDL2_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.gz"
LIB_DIRECTORY=$LIB_VERSION
LIB_URL="https://libsdl.org/release/"

mkdir -p sdl2
pushd sdl2 >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	# We don't want SDL2 to pull in system iconv, force it to detect ours with flags.
	# Don't use X11 - we don't need it and Mountain Lion removed it
	(./configure CPPFLAGS="-I${ICONV_DIR}/include" \
		CFLAGS="$CFLAGS" \
		CXXFLAGS="$CXXFLAGS" \
		LDFLAGS="$LDFLAGS -L${ICONV_DIR}/lib" \
		--prefix="$INSTALL_DIR" \
		--disable-video-x11 \
		--without-x \
		--enable-video-cocoa \
		--enable-shared=no &&
		make "$JOBS" && make install) || die "SDL2 build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building Boost..."

LIB_VERSION="${BOOST_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.bz2"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="https://boostorg.jfrog.io/artifactory/main/release/1.76.0/source/"

mkdir -p boost
pushd boost >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY include lib
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	# Can't use macosx-version, see above comment.
	(
		./bootstrap.sh --with-libraries=filesystem,system \
			--prefix="$INSTALL_DIR" &&
			./b2 cflags="$CFLAGS" \
				toolset=clang \
				cxxflags="$CXXFLAGS" \
				linkflags="$LDFLAGS" "${JOBS}" \
				-d2 \
				--layout=system \
				--debug-configuration \
				link=static \
				threading=multi \
				variant=release install
	) || die "Boost build failed"

	popd
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
# TODO: This build takes ages, anything we can exclude?
echo "Building wxWidgets..."

LIB_VERSION="${WXWIDGETS_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.bz2"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="http://github.com/wxWidgets/wxWidgets/releases/download/v3.1.4/"

mkdir -p wxwidgets
pushd wxwidgets >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	mkdir -p build-release
	pushd build-release

	CONF_OPTS="--prefix=$INSTALL_DIR
    --disable-shared
    --enable-unicode
    --with-cocoa
    --with-opengl
    --with-libiconv-prefix=${ICONV_DIR}
    --enable-universal-binary=${ARCH}
    --with-expat=builtin
    --with-libpng=builtin
    --without-libtiff
    --without-sdl
    --without-x
    --disable-stc
    --disable-webview
    --disable-webkit
    --disable-webviewwebkit
    --disable-webviewie
    --without-libjpeg"
	# wxWidgets configure now defaults to targeting 10.5, if not specified,
	# but that conflicts with our flags
	if [ -n "$MIN_OSX_VERSION" ]; then
		CONF_OPTS="$CONF_OPTS --with-macosx-version-min=$MIN_OSX_VERSION"
	fi
	# shellcheck disable=SC2086
	(../configure CFLAGS="$ARCHLESS_CFLAGS" \
		CXXFLAGS="$ARCHLESS_CXXFLAGS" \
		CPPFLAGS="-D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES=1" \
		LDFLAGS="$ARCHLESS_LDFLAGS" $CONF_OPTS &&
		make "${JOBS}" && make install) || die "wxWidgets build failed"
	popd
	popd
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building libpng..."

LIB_VERSION="${PNG_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.gz"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="http://download.sourceforge.net/libpng/"

mkdir -p libpng
pushd libpng >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	# libpng has no flags for zlib but the 10.12 version is too old, so link our own.
	(./configure CFLAGS="$CFLAGS" CPPFLAGS=" -I $ZLIB_DIR/include " \
		LDFLAGS="$LDFLAGS -L$ZLIB_DIR/lib" \
		--prefix="$INSTALL_DIR" \
		--enable-shared=no &&
		make "${JOBS}" && make install) || die "libpng build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building freetype..."

LIB_VERSION="${FREETYPE_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.gz"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="https://download.savannah.gnu.org/releases/freetype/"

mkdir -p freetype
pushd freetype >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	(./configure CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" \
		--prefix="$INSTALL_DIR" \
		"$HOST_PLATFORM" \
		--enable-shared=no \
		--with-harfbuzz=no \
		--with-bzip2=no \
		--with-brotli=no &&
		make "${JOBS}" && make install) || die "freetype build failed"
	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
# Dependency of vorbis
echo "Building libogg..."

LIB_VERSION="${OGG_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.gz"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="http://downloads.xiph.org/releases/ogg/"

mkdir -p libogg
pushd libogg >/dev/null
OGG_DIR="$(pwd)"

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY include lib share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	(./configure CFLAGS="$CFLAGS" \
		LDFLAGS="$LDFLAGS" \
		--prefix="$OGG_DIR" \
		--enable-shared=no &&
		make "${JOBS}" && make install) || die "libogg build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building libvorbis..."

LIB_VERSION="${VORBIS_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.gz"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="http://downloads.xiph.org/releases/vorbis/"

mkdir -p vorbis
pushd vorbis >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY include lib share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	(./configure CFLAGS="$CFLAGS" \
		LDFLAGS="$LDFLAGS" \
		--prefix="$INSTALL_DIR" \
		--enable-shared=no \
		--with-ogg="$OGG_DIR" &&
		make "${JOBS}" && make install) || die "libvorbis build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building GMP..."

LIB_VERSION="${GMP_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.bz2"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="https://gmplib.org/download/gmp/"

mkdir -p gmp
pushd gmp >/dev/null

GMP_DIR="$(pwd)"

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	# NOTE: enable-fat in this case allows building and running on different CPUS.
	# Otherwise CPU-specific instructions will be used with no fallback for older CPUs.
	(./configure CFLAGS="$CFLAGS" \
		CXXFLAGS="$CXXFLAGS" \
		LDFLAGS="$LDFLAGS" \
		"$HOST_PLATFORM" \
		--prefix="$INSTALL_DIR" \
		--enable-fat \
		--disable-shared \
		--with-pic &&
		make "${JOBS}" && make install) || die "GMP build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building Nettle..."
# Also builds hogweed

LIB_VERSION="${NETTLE_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.gz"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="https://ftp.gnu.org/gnu/nettle/"

mkdir -p nettle
pushd nettle >/dev/null

NETTLE_DIR="$(pwd)"

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	# NOTE: enable-fat in this case allows building and running on different CPUS.
	# Otherwise CPU-specific instructions will be used with no fallback for older CPUs.
	(./configure CFLAGS="$CFLAGS" \
		CXXFLAGS="$CXXFLAGS" \
		LDFLAGS="$LDFLAGS" \
		--with-include-path="${GMP_DIR}/include" \
		--with-lib-path="${GMP_DIR}/lib" \
		--prefix="$INSTALL_DIR" \
		--enable-fat \
		--disable-shared \
		--disable-documentation \
		--disable-openssl \
		--disable-assembler &&
		make "${JOBS}" && make install) || die "Nettle build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building GnuTLS..."

LIB_VERSION="${GNUTLS_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.xz"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="https://www.gnupg.org/ftp/gcrypt/gnutls/v3.8/"

mkdir -p gnutls
pushd gnutls >/dev/null

GNUTLS_DIR="$(pwd)"

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	# Patch GNUTLS for a linking issue with isdigit
	# Patch by Ross Nicholson: https://gitlab.com/gnutls/gnutls/-/issues/1033#note_379529145
	(patch -Np1 -i ../../../macos-patches/03-undo-libtasn1-cisdigit.patch &&
		./configure CFLAGS="$CFLAGS" \
			CXXFLAGS="$CXXFLAGS" \
			LDFLAGS="$LDFLAGS" \
			LIBS="-L${GMP_DIR}/lib -lgmp" \
			NETTLE_CFLAGS="-I${NETTLE_DIR}/include" \
			NETTLE_LIBS="-L${NETTLE_DIR}/lib -lnettle" \
			HOGWEED_CFLAGS="-I${NETTLE_DIR}/include" \
			HOGWEED_LIBS="-L${NETTLE_DIR}/lib -lhogweed" \
			GMP_CFLAGS="-I${GMP_DIR}/include" \
			GMP_LIBS="-L${GMP_DIR}/lib -lgmp" \
			--prefix="$INSTALL_DIR" \
			--enable-shared=no \
			--without-idn \
			--with-included-unistring \
			--with-included-libtasn1 \
			--without-p11-kit \
			--without-brotli \
			--disable-tests \
			--disable-guile \
			--disable-doc \
			--disable-tools \
			--disable-nls &&
		make "${JOBS}" LDFLAGS= install) || die "GnuTLS build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building gloox..."

LIB_VERSION="${GLOOX_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.bz2"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="http://camaya.net/download/"

mkdir -p gloox
pushd gloox >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	# TODO: pulls in libresolv dependency from /usr/lib
	(./configure CFLAGS="$CFLAGS" \
		CXXFLAGS="$CXXFLAGS" \
		LDFLAGS="$LDFLAGS" \
		"$HOST_PLATFORM" \
		--prefix="$INSTALL_DIR" \
		GNUTLS_CFLAGS="-I${GNUTLS_DIR}/include" \
		GNUTLS_LIBS="-L${GNUTLS_DIR}/lib -lgnutls" \
		--enable-shared=no \
		--with-zlib="${ZLIB_DIR}" \
		--without-libidn \
		--with-gnutls="yes" \
		--without-openssl \
		--without-tests \
		--without-examples \
		--disable-getaddrinfo &&
		make "${JOBS}" && make install) || die "gloox build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building ICU..."

LIB_VERSION="${ICU_VERSION}"
LIB_ARCHIVE="$LIB_VERSION-src.tgz"
LIB_DIRECTORY="icu"
LIB_URL="https://github.com/unicode-org/icu/releases/download/release-69-1/"

mkdir -p icu
pushd icu >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib sbin share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	mkdir -p source/build
	pushd source/build

	(CFLAGS="$CFLAGS" CXXFLAGS="$CXXFLAGS" LDFLAGS="$LDFLAGS" \
		../runConfigureICU MacOSX \
		"$HOST_PLATFORM" \
		--prefix="$INSTALL_DIR" \
		--disable-shared \
		--enable-static \
		--disable-samples \
		--enable-extras \
		--enable-icuio \
		--enable-tools &&
		make "${JOBS}" && make install) || die "ICU build failed"

	popd
	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building ENet..."

LIB_VERSION="${ENET_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.gz"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="http://enet.bespin.org/download/"

mkdir -p enet
pushd enet >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib sbin share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	(./configure CFLAGS="$CFLAGS" \
		LDFLAGS="$LDFLAGS" \
		--prefix="${INSTALL_DIR}" \
		--enable-shared=no &&
		make clean && make "${JOBS}" && make install) || die "ENet build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building MiniUPnPc..."

LIB_VERSION="${MINIUPNPC_VERSION}"
LIB_ARCHIVE="$LIB_VERSION.tar.gz"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="http://miniupnp.tuxfamily.org/files/download.php?file="

mkdir -p miniupnpc
pushd miniupnpc >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat <.already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib "$LIB_URL" $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY bin include lib share
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	(
		make clean &&
			CFLAGS=$CFLAGS LDFLAGS=$LDFLAGS make "${JOBS}" &&
			INSTALLPREFIX="$INSTALL_DIR" make install
	) || die "MiniUPnPc build failed"

	popd
	# TODO: how can we not build the dylibs?
	rm -f lib/*.dylib
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building libsodium..."

LIB_VERSION="${SODIUM_VERSION}"
LIB_ARCHIVE="$SODIUM_VERSION.tar.gz"
LIB_DIRECTORY="$LIB_VERSION"
LIB_URL="https://download.libsodium.org/libsodium/releases/"

mkdir -p libsodium
pushd libsodium >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$LIB_VERSION" ]; then
	INSTALL_DIR="$(pwd)"

	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY include lib
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	(
		./configure CFLAGS="$CFLAGS" \
			LDFLAGS="$LDFLAGS" \
			--prefix="${INSTALL_DIR}" \
			--enable-shared=no &&
			make clean &&
			CFLAGS=$CFLAGS LDFLAGS=$LDFLAGS make "${JOBS}" &&
			make check &&
			INSTALLPREFIX="$INSTALL_DIR" make install
	) || die "libsodium build failed"

	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$LIB_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building fmt..."

LIB_DIRECTORY="fmt-$FMT_VERSION"
LIB_ARCHIVE="$FMT_VERSION.tar.gz"
LIB_URL="https://github.com/fmtlib/fmt/archive/"

mkdir -p fmt
pushd fmt >/dev/null

if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$FMT_VERSION" ]; then
	INSTALL_DIR="$(pwd)"
	rm -f .already-built

	download_lib $LIB_URL $LIB_ARCHIVE

	rm -rf $LIB_DIRECTORY include lib
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY

	# It appears that older versions of Clang require constexpr statements to have a user-set constructor.
	patch -Np1 -i ../../../macos-patches/fmt_constexpr.diff

	mkdir -p build
	pushd build

	# shellcheck disable=SC2086
	(cmake .. \
		-DFMT_TEST=False \
		-DFMT_DOC=False \
		-DCMAKE_INSTALL_PREFIX="$INSTALL_DIR" \
		$CMAKE_FLAGS &&
		make fmt "${JOBS}" && make install) || die "fmt build failed"

	popd
	popd
	cp -f lib/pkgconfig/* "$PC_PATH"
	echo "$FMT_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------
echo "Building Molten VK..."
LIB_DIRECTORY="MoltenVK-$MOLTENVK_VERSION"
LIB_ARCHIVE="MoltenVK-$MOLTENVK_VERSION.tar.gz"
LIB_URL="https://releases.wildfiregames.com/libs/"

mkdir -p "molten-vk"
pushd "molten-vk" >/dev/null
if [ $force_rebuild = "true" ] || [ ! -e .already-built ] || [ "$(cat .already-built)" != "$MOLTENVK_VERSION" ] || [ ! -e ../../../binaries/system/libMoltenVK.dylib ]; then
	INSTALL_DIR="../../../../binaries/system/"
	rm -f .already-built
	download_lib $LIB_URL $LIB_ARCHIVE
	rm -rf "$LIB_DIRECTORY"
	tar -xf $LIB_ARCHIVE
	pushd $LIB_DIRECTORY
	# The CI cannot build MoltenVK so we provide prebuild binaries instead.
	# Use mv instead of copy to preserve binary signature integrity. See:
	# https://developer.apple.com/forums/thread/130313?answerId=410541022#410541022
	mv dylib/libMoltenVK.dylib $INSTALL_DIR
	popd >/dev/null
	echo "$MOLTENVK_VERSION" >.already-built
else
	already_built
fi
popd >/dev/null

# --------------------------------------------------------------------
# The following libraries are shared on different OSes and may
# be customized, so we build and install them from bundled sources
# (served over SVN)
# --------------------------------------------------------------------

if [ -e ../source/.svn ]; then
	pushd ../source >/dev/null
	svn cleanup && svn up -r $source_svnrev
	popd >/dev/null
else
	svn co -r $source_svnrev https://svn.wildfiregames.com/public/source-libs/trunk ../source
fi

# SpiderMonkey - bundled, no download
pushd ../source/spidermonkey/ >/dev/null

if [ $force_rebuild = "true" ]; then
	rm -f .already-built
fi

# Use the regular build script for SM.
JOBS="$JOBS" ZLIB_DIR="$ZLIB_DIR" ARCH="$ARCH" ./build.sh || die "Error building spidermonkey"
cp bin/* ../../../binaries/system/

popd >/dev/null

# --------------------------------------------------------------
# NVTT - bundled, no download
pushd ../source/nvtt >/dev/null

if [ $force_rebuild = "true" ]; then
	rm -f .already-built
fi

CXXFLAGS="$CXXFLAGS" CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" CMAKE_FLAGS=$CMAKE_FLAGS JOBS="$JOBS" ./build.sh || die "Error building NVTT"
cp bin/* ../../../binaries/system/

popd >/dev/null

# --------------------------------------------------------------
# FCollada - bundled, no download
pushd ../source/fcollada/ >/dev/null

if [ $force_rebuild = "true" ]; then
	rm -f .already-built
fi

CXXFLAGS="$CXXFLAGS" CFLAGS="$CFLAGS" LDFLAGS="$LDFLAGS" JOBS="$JOBS" ./build.sh || die "Error building FCollada"
cp bin/* ../../../binaries/system/

popd >/dev/null