Support universal (x86_64/arm64) builds for macOS

The macOS binary (libgodot-xterm.osx.64.dylib) is now a universal binary
that runs natively on both x86_64 and arm64.

.github/workflows/main.yml

@@ -130,7 +130,8 @@ jobs:
           OS: ${{ matrix.os }}
         run: |
           cd addons/godot_xterm/native/thirdparty/libuv
-          args="-DCMAKE_BUILD_TYPE=$TARGET -DBUILD_SHARED_LIBS=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=TRUE"
+          args="-DCMAKE_BUILD_TYPE=$TARGET -DBUILD_SHARED_LIBS=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=TRUE \
+            -DCMAKE_OSX_ARCHITECTURES=x86_64;arm64"
           if [ "$TARGET" == "release" ]; then
             args="$args -DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreadedDLL"
           else

CHANGELOG.md

@@ -6,7 +6,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 
 ## [Unreleased](https://github.com/lihop/godot-xterm/compare/v2.0.0...HEAD)
-
+### Added
+- Support for macOS universal (x86_64/arm64) binaries. The macOS binary
+  `libgodot-xterm.osx.64.dylib` is now a universal binary that runs natively
+  on both x86_64 and arm64.
 
 ## [v2.0.0](https://github.com/lihop/godot-xterm/compare/v1.2.1...v2.0.0) - 2021-07-25
 ### Added

addons/godot_xterm/native/SConstruct

@@ -62,6 +62,8 @@ opts.Add(EnumVariable(
     allowed_values=('debug', 'release'),
     ignorecase=2
 ))
+opts.Add(EnumVariable("macos_arch", "Target macOS architecture",
+         "universal", ["universal", "x86_64", "arm64"]))
 opts.Add(BoolVariable(
     'disable_pty',
     'Disables the PTY and its dependencies (LibuvUtils and Pipe). Has no effect on platforms where PTY is not supported',
@@ -139,15 +141,17 @@ elif env['platform'] == 'osx':
 
     if env['bits'] == '32':
         raise ValueError(
-            'Only 64-bit builds are supported for the macOS target.'
+            'Only 64-bit builds are supported for the osx platform.'
         )
 
-    env.Append(CCFLAGS=['-arch', 'x86_64'])
-    env.Append(LINKFLAGS=[
-        '-arch',
-        'x86_64',
-        '-Wl,-undefined,dynamic_lookup',
-    ])
+    if env["macos_arch"] == "universal":
+        env.Append(LINKFLAGS=["-arch", "x86_64", "-arch", "arm64"])
+        env.Append(CCFLAGS=["-arch", "x86_64", "-arch", "arm64"])
+    else:
+        env.Append(LINKFLAGS=["-arch", env["macos_arch"]])
+        env.Append(CCFLAGS=["-arch", env["macos_arch"]])
+
+    env.Append(LINKFLAGS=['-Wl,-undefined,dynamic_lookup'])
 
     if env['target'] == 'debug':
         env.Append(CCFLAGS=['-Og', '-g'])
@@ -249,7 +253,8 @@ env.Append(LIBS=[
     env.File('thirdparty/godot-cpp/bin/libgodot-cpp.{}.{}.{}{}'.format(
         env['platform'],
         env['target'],
-        'wasm' if env['platform'] == 'javascript' else env['bits'],
+        'wasm' if env['platform'] == 'javascript' else env['macos_arch'] if (
+            env['macos_arch'] != 'universal' and env['platform'] == 'osx') else env['bits'],
         env['LIBSUFFIX'],
     )),
     env.File('thirdparty/libtsm/build/bin/libtsm.{}.{}.{}{}'.format(

addons/godot_xterm/native/build.sh

@@ -58,13 +58,14 @@ updateSubmodules GODOT_CPP_DIR ${NATIVE_DIR}/thirdparty/godot-cpp
 # Build godot-cpp bindings.
 cd ${GODOT_CPP_DIR}
 echo "scons generate_bindings=yes target=$target -j$nproc"
-scons generate_bindings=yes target=$target -j$nproc
+scons generate_bindings=yes macos_arch=$(uname -m) target=$target -j$nproc
 
 # Build libuv as a static library.
 cd ${LIBUV_DIR}
 mkdir build || true
 cd build
-args="-DCMAKE_BUILD_TYPE=$target -DBUILD_SHARED_LIBS=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=TRUE"
+args="-DCMAKE_BUILD_TYPE=$target -DBUILD_SHARED_LIBS=OFF -DCMAKE_POSITION_INDEPENDENT_CODE=TRUE \
+	-DCMAKE_OSX_ARCHITECTURES=$(uname -m)"
 if [ "$target" == "release" ]; then
 	args="$args -DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreadedDLL"
 else
@@ -76,7 +77,7 @@ cmake --build build --config $target -j$nproc
 
 # Build libgodot-xterm.
 cd ${NATIVE_DIR}
-scons target=$target disable_pty=$disable_pty -j$nproc
+scons target=$target macos_arch=$(uname -m) disable_pty=$disable_pty -j$nproc
 
 # Use Docker to build libgodot-xterm javascript.
 if [ -x "$(command -v docker-compose)" ]; then