From b1d81e860fcb5dd65fb6bab8d9669a556c6746d9 Mon Sep 17 00:00:00 2001
From: TheBrokenRail <connor24nolan@live.com>
Date: Thu, 24 Jun 2021 12:40:34 -0400
Subject: [PATCH] Compile For ARM64

---
 CMakeLists.txt                                | 12 ++++--
 ...hf-toolchain.cmake => arm-toolchain.cmake} |  0
 cmake/arm64-toolchain.cmake                   | 10 +++++
 debian/client-arm64                           |  7 +++
 debian/server-arm64                           |  7 +++
 scripts/build.sh                              | 43 +++++++++++++++++++
 scripts/install-dependencies.sh               |  6 ++-
 7 files changed, 81 insertions(+), 4 deletions(-)
 rename cmake/{armhf-toolchain.cmake => arm-toolchain.cmake} (100%)
 create mode 100644 cmake/arm64-toolchain.cmake
 create mode 100644 debian/client-arm64
 create mode 100644 debian/server-arm64

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 064e0a8e0..eb3d23766 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,12 +24,18 @@ else()
 endif()
 
 # Use Clang By Default
-set(CMAKE_C_COMPILER clang)
-set(CMAKE_CXX_COMPILER clang++)
+if(NOT DEFINED CMAKE_TOOLCHAIN_FILE)
+    if(NOT DEFINED CMAKE_C_COMPILER)
+        set(CMAKE_C_COMPILER clang)
+    endif()
+    if(NOT DEFINED CMAKE_CXX_COMPILER)
+        set(CMAKE_CXX_COMPILER clang++)
+    endif()
+endif()
 
 # Setup ARM Cross Compilation
 if(USE_ARM32_TOOLCHAIN)
-    include(cmake/armhf-toolchain.cmake)
+    include(cmake/arm-toolchain.cmake)
 endif()
 
 # Use LLD When Using Clang
diff --git a/cmake/armhf-toolchain.cmake b/cmake/arm-toolchain.cmake
similarity index 100%
rename from cmake/armhf-toolchain.cmake
rename to cmake/arm-toolchain.cmake
diff --git a/cmake/arm64-toolchain.cmake b/cmake/arm64-toolchain.cmake
new file mode 100644
index 000000000..5f39b83d9
--- /dev/null
+++ b/cmake/arm64-toolchain.cmake
@@ -0,0 +1,10 @@
+# Compile For ARM64
+if(NOT (CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64_be" OR CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64" OR CMAKE_SYSTEM_PROCESSOR STREQUAL "armv8b" OR CMAKE_SYSTEM_PROCESSOR STREQUAL "armv8l"))
+    # Use ARM64 Cross-Compiler
+    set(TARGET "aarch64-linux-gnu")
+    set(CMAKE_C_COMPILER "${TARGET}-gcc")
+    set(CMAKE_CXX_COMPILER "${TARGET}-g++")
+    set(CMAKE_FIND_ROOT_PATH "/usr/${TARGET}" "/usr/lib/${TARGET}")
+endif()
+set(CMAKE_SYSTEM_NAME "Linux")
+set(CMAKE_SYSTEM_PROCESSOR "aarch64")
diff --git a/debian/client-arm64 b/debian/client-arm64
new file mode 100644
index 000000000..c22112271
--- /dev/null
+++ b/debian/client-arm64
@@ -0,0 +1,7 @@
+Package: minecraft-pi-reborn-client
+Version: ${VERSION}
+Maintainer: TheBrokenRail <connor24nolan@live.com>
+Description: Fun with Blocks
+Homepage: https://www.minecraft.net/en-us/edition/pi
+Architecture: arm64
+Depends: zenity, libgles1, libegl1, libglfw3 | libglfw3-wayland, libfreeimage3, libc6-armhf-cross, libstdc++6-armhf-cross
diff --git a/debian/server-arm64 b/debian/server-arm64
new file mode 100644
index 000000000..971ccad2b
--- /dev/null
+++ b/debian/server-arm64
@@ -0,0 +1,7 @@
+Package: minecraft-pi-reborn-server
+Version: ${VERSION}
+Maintainer: TheBrokenRail <connor24nolan@live.com>
+Description: Fun with Blocks
+Homepage: https://www.minecraft.net/en-us/edition/pi
+Architecture: arm64
+Depends: libc6-armhf-cross, libstdc++6-armhf-cross
diff --git a/scripts/build.sh b/scripts/build.sh
index 9229abf28..fd1b68984 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -46,6 +46,44 @@ native_build() {
     cd ../../
 }
 
+# Build For ARM64
+arm64_build() {
+    # Create Build Dir
+    rm -rf build/$1-arm64
+    mkdir -p build/$1-arm64
+    cd build/$1-arm64
+
+    # Create Prefix
+    local prefix="$(cd ../../; pwd)/out/$1-arm64"
+    rm -rf "${prefix}"
+    mkdir -p "${prefix}"
+
+    # Prepare
+    local extra_arg='-DMCPI_USE_MEDIA_LAYER_PROXY=ON'
+    if [ "$1" = "server" ]; then
+        extra_arg='-DMCPI_SERVER_MODE=ON'
+    fi
+
+    # Build ARM Components
+    mkdir arm
+    cd arm
+    cmake -DMCPI_BUILD_MODE=arm "${extra_arg}" ../../..
+    make -j$(nproc)
+    make install DESTDIR="${prefix}"
+    cd ../
+
+    # Build Native Components
+    mkdir native
+    cd native
+    cmake -DCMAKE_TOOLCHAIN_FILE="$(cd ../../../; pwd)/cmake/arm64-toolchain.cmake" -DMCPI_BUILD_MODE=native "${extra_arg}" ../../..
+    make -j$(nproc)
+    make install DESTDIR="${prefix}"
+    cd ../
+
+    # Exit
+    cd ../../
+}
+
 # Build For ARM
 arm_build() {
     # Create Build Dir
@@ -79,6 +117,11 @@ rm -rf out
 # Build
 native_build client
 native_build server
+if [ ! -z "${ARM_PACKAGES_SUPPORTED}" ]; then
+    # Requires ARM Versions Of GLFW And FreeImage
+    arm64_build client
+fi
+arm64_build server
 if [ ! -z "${ARM_PACKAGES_SUPPORTED}" ]; then
     # Requires ARM Versions Of GLFW And FreeImage
     arm_build client
diff --git a/scripts/install-dependencies.sh b/scripts/install-dependencies.sh
index f2c666f82..958842ff9 100755
--- a/scripts/install-dependencies.sh
+++ b/scripts/install-dependencies.sh
@@ -11,6 +11,7 @@ fi
 # Add ARM Repository
 if [ ! -z "${ARM_PACKAGES_SUPPORTED}" ]; then
     sudo dpkg --add-architecture armhf
+    sudo dpkg --add-architecture arm64
 fi
 
 # Update APT
@@ -29,12 +30,15 @@ sudo apt-get install --no-install-recommends -y \
     libglfw3 libglfw3-dev \
     libfreeimage3 libfreeimage-dev \
     crossbuild-essential-armhf \
+    crossbuild-essential-arm64 \
     qemu-user-static
 
 # Install ARM Dependencies
 if [ ! -z "${ARM_PACKAGES_SUPPORTED}" ]; then
     sudo apt-get install --no-install-recommends -y \
         libglfw3:armhf libglfw3-dev:armhf \
-        libfreeimage3:armhf
+        libfreeimage3:armhf \
+        libglfw3:arm64 libglfw3-dev:arm64 \
+        libfreeimage3:arm64
 fi