#!/bin/bash
# Run in SDL 2 source directory on Linux.
# Built libraries will be copied to ./ztm-libs/{win32,win64,macos-ub1,macos-ub2}
#
# Set up:
# 1. Windows libaries:
# Install mingw-w64 for i686 and x86_64
#
# 2. macOS libraries:
# Follow osxcross directions to set up macOS (11.3) SDK to build a Universal 2 (arm64/x86_64) dylib.
# (I rename osxcross/target/ to osxcross/target-11.3/ but you could change OSXCROSS_TARGET_UB2 below instead.)
#
# Download rcodesign to ad-hoc sign macOS libraries.
#  I'm not entirely sure how necessary this is but it fixes broken signiture checksums after using strip.
#  Info: https://github.com/indygreg/PyOxidizer/tree/main/apple-codesign
#  Download page: https://github.com/indygreg/PyOxidizer/releases/tag/apple-codesign%2F0.17.0
#
# 3. If building SDL < 2.24.0, you can also build Universal 1 dylib with ppc/x86/x86_64.
# If you haven't yet, rename osxcross/target/ to osxcross/target-11.3/
# Repeat osxcross set up with macOS 10.13 SDK. Rename osxcross/target/ to osxcross/target-10.13/.
#
# For Universal 1, you need to extract the SDL 2.0.1 ppc build from ioq3.
# git clone https://github.com/ioquake/ioq3
# mkdir ./ztm-libs-ioq3-prebuilt-ppc
# x86_64-apple-darwin17-lipo -extract ppc ioq3/code/libs/macos-ub/libSDL2-2.0.0.dylib -o ./ztm-libs-ioq3-prebuilt-ppc/libSDL2-2.0.0.dylib
# x86_64-apple-darwin17-lipo -extract ppc ioq3/code/libs/macos-ub/libSDL2main.a -o ./ztm-libs-ioq3-prebuilt-ppc/libSDL2main.a

# For building macOS libraries; change for your system.
OSXCROSS_TARGET_UB1=$HOME/tools/osxcross/target-10.13
OSXCROSS_TARGET_UB2=$HOME/tools/osxcross/target-11.3
RCODESIGN=$HOME/tools/apple-codesign-0.17.0-x86_64-unknown-linux-musl/rcodesign

# You can set this to 0 and then enable one BUILD_* manually below.
BUILD_DEFAULT=1

# Build Windows x86 (SDL2.dll).
BUILD_WIN32=$BUILD_DEFAULT

# Build Windows x86_64 (SDL2.dll).
BUILD_WIN64=$BUILD_DEFAULT

# Build Windows x86_64 (SDL264.dll).
# Renames SDL2.dll to SDL264.dll to match ioquake3 naming convension.
BUILD_WIN64_SDL264=$BUILD_DEFAULT

# Build macOS Universal Binary 1 (macOS 10.6+, x86, x86_64)
# - Merged with pre-built powerpc (macOS 10.5+, ppc)
# - Only for SDL < 2.24.0
BUILD_MACOS_UB1=0

# Build macOS Universal Binary 2 (macOS 10.9+, x86_64, arm64)
# I'm not sure what the oldest version that works on macOS arm64 is (2.0.14 works).
BUILD_MACOS_UB2=$BUILD_DEFAULT

if [ -n "$BUILD_WIN32" ] && [ "$BUILD_WIN32" -eq 1 ]; then
	mkdir -p ztm-mingw-x86
	cd ztm-mingw-x86
	if [ ! -f ./config.log ]; then
		../configure --host=i686-w64-mingw32 --prefix=$(pwd)/prefix
	fi
	make -j$(nproc)
	make install
	i686-w64-mingw32-strip -x $(pwd)/prefix/bin/*.dll $(pwd)/prefix/lib/*.a
	mkdir -p ../ztm-libs/win32/
	cp $(pwd)/prefix/bin/*.dll $(pwd)/prefix/lib/*.a ../ztm-libs/win32/

	cd ..
fi

if [ -n "$BUILD_WIN64" ] && [ "$BUILD_WIN64" -eq 1 ]; then
	mkdir -p ztm-mingw-x86_64
	cd ztm-mingw-x86_64
	if [ ! -f ./config.log ]; then
		../configure --host=x86_64-w64-mingw32 --prefix=$(pwd)/prefix
	fi
	make -j$(nproc)
	make install
	x86_64-w64-mingw32-strip -x $(pwd)/prefix/bin/*.dll $(pwd)/prefix/lib/*.a
	mkdir -p ../ztm-libs/win64/
	cp $(pwd)/prefix/bin/*.dll $(pwd)/prefix/lib/*.a ../ztm-libs/win64/

	cd ..
fi

if [ -n "$BUILD_WIN64_SDL264" ] && [ "$BUILD_WIN64_SDL264" -eq 1 ]; then
	mkdir -p ztm-mingw-x86_64-sdl264
	cd ztm-mingw-x86_64-sdl264
	if [ ! -f ./config.log ]; then
		../configure --host=x86_64-w64-mingw32 --prefix=$(pwd)/prefix
		sed -i -s "s/libSDL2/libSDL264/g" Makefile
	fi
	make -j$(nproc)
	make install
	x86_64-w64-mingw32-strip -x $(pwd)/prefix/bin/*.dll $(pwd)/prefix/lib/*.a
	mkdir -p ../ztm-libs/win64/
	cp $(pwd)/prefix/bin/*.dll $(pwd)/prefix/lib/*.a ../ztm-libs/win64/

	cd ..
fi

if [ -n "$BUILD_MACOS_UB1" ] && [ "$BUILD_MACOS_UB1" -eq 1 ]; then
	# This needs to be added to PATH for macOS configure and make.
	export PATH="${OSXCROSS_TARGET_UB1}/bin/:$PATH"

	# Build macOS x86 (10.13 SDK)
	mkdir -p ztm-macos-x86-darwin17
	cd ztm-macos-x86-darwin17
	if [ ! -f ./config.log ]; then
		../configure --prefix=$(pwd)/prefix --host=i386-apple-darwin17 CC=i386-apple-darwin17-cc
	fi
	make -j$(nproc)
	make install
	i386-apple-darwin17-install_name_tool -id "@executable_path/libSDL2-2.0.0.dylib" $(pwd)/prefix/lib/libSDL2-2.0.0.dylib
	i386-apple-darwin17-strip -x $(pwd)/prefix/lib/libSDL2-2.0.0.dylib $(pwd)/prefix/lib/*.a
	#mkdir -p ../ztm-libs/x86/
	#cp $(pwd)/prefix/lib/*.dylib $(pwd)/prefix/lib/*.a ../ztm-libs/x86/

	cd ..

	# Build macOS x86_64 (10.13 SDK)
	mkdir -p ztm-macos-x86_64-darwin17
	cd ztm-macos-x86_64-darwin17
	if [ ! -f ./config.log ]; then
		../configure --prefix=$(pwd)/prefix --host=x86_64-apple-darwin17 CC=x86_64-apple-darwin17-cc
	fi
	make -j$(nproc)
	make install
	x86_64-apple-darwin17-install_name_tool -id "@executable_path/libSDL2-2.0.0.dylib" $(pwd)/prefix/lib/libSDL2-2.0.0.dylib
	x86_64-apple-darwin17-strip -x $(pwd)/prefix/lib/libSDL2-2.0.0.dylib $(pwd)/prefix/lib/*.a
	#mkdir -p ../ztm-libs/x86_64/
	#cp $(pwd)/prefix/lib/*.dylib $(pwd)/prefix/lib/*.a ../ztm-libs/x86_64/

	cd ..

	# Merge x86, x86_64, and SDL 2.0.1 PPC build from ioquake3.
	mkdir -p ./ztm-libs/macos-ub1
	x86_64-apple-darwin17-lipo -create -o ./ztm-libs/macos-ub1/libSDL2-2.0.0.dylib ./ztm-libs-ioq3-prebuilt-ppc/libSDL2-2.0.0.dylib ./ztm-macos-{x86,x86_64}-darwin17/prefix/lib/libSDL2-2.0.0.dylib
	x86_64-apple-darwin17-lipo -create -o ./ztm-libs/macos-ub1/libSDL2main.a ./ztm-libs-ioq3-prebuilt-ppc/libSDL2main.a ./ztm-macos-{x86,x86_64}-darwin17/prefix/lib/libSDL2main.a
	# Ad-hoc sign
	$RCODESIGN sign ./ztm-libs/macos-ub1/libSDL2-2.0.0.dylib
fi

if [ -n "$BUILD_MACOS_UB2" ] && [ "$BUILD_MACOS_UB2" -eq 1 ]; then
	# This needs to be added to PATH for macOS configure and make.
	export PATH="${OSXCROSS_TARGET_UB2}/bin/:$PATH"

	# Build macOS x86_64 (11.3 SDK)
	mkdir -p ztm-macos-x86_64
	cd ztm-macos-x86_64
	if [ ! -f ./config.log ]; then
		../configure --prefix=$(pwd)/prefix --host=x86_64-apple-darwin20.4 CC=x86_64-apple-darwin20.4-cc
	fi
	make -j$(nproc)
	make install
	x86_64-apple-darwin20.4-install_name_tool -id "@executable_path/libSDL2-2.0.0.dylib" $(pwd)/prefix/lib/libSDL2-2.0.0.dylib
	x86_64-apple-darwin20.4-strip -x $(pwd)/prefix/lib/libSDL2-2.0.0.dylib $(pwd)/prefix/lib/*.a
	#mkdir -p ../ztm-libs/x86_64/
	#cp $(pwd)/prefix/lib/*.dylib $(pwd)/prefix/lib/*.a ../ztm-libs/x86_64/

	cd ..

	# Build macOS Apple Silicon (11.3 SDK)
	mkdir -p ztm-macos-aarch64
	cd ztm-macos-aarch64
	if [ ! -f ./config.log ]; then
		../configure --prefix=$(pwd)/prefix --host=aarch64-apple-darwin20.4 CC=aarch64-apple-darwin20.4-cc
	fi
	make -j$(nproc)
	make install
	aarch64-apple-darwin20.4-install_name_tool -id "@executable_path/libSDL2-2.0.0.dylib" $(pwd)/prefix/lib/libSDL2-2.0.0.dylib
	aarch64-apple-darwin20.4-strip -x $(pwd)/prefix/lib/libSDL2-2.0.0.dylib $(pwd)/prefix/lib/*.a
	#mkdir -p ../ztm-libs/aarch64/
	#cp $(pwd)/prefix/lib/*.dylib $(pwd)/prefix/lib/*.a ../ztm-libs/aarch64/

	cd ..

	# Merge x86_64 and aarch64 libraries.
	mkdir -p ./ztm-libs/macos-ub2
	aarch64-apple-darwin20.4-lipo -create -o ./ztm-libs/macos-ub2/libSDL2-2.0.0.dylib ./ztm-macos-{x86_64,aarch64}/prefix/lib/libSDL2-2.0.0.dylib
	aarch64-apple-darwin20.4-lipo -create -o ./ztm-libs/macos-ub2/libSDL2main.a ./ztm-macos-{x86_64,aarch64}/prefix/lib/libSDL2main.a
	# Ad-hoc sign
	$RCODESIGN sign ./ztm-libs/macos-ub2/libSDL2-2.0.0.dylib
fi