Add Apple Silicon support

gui/Scyther/Scyther.py

@@ -30,6 +30,8 @@ import os.path
 import sys
 import io
 import tempfile
+import platform
+
 try:
     import hashlib
     HASHLIB = True
@@ -170,6 +172,12 @@ def getScytherBackend():
     elif "darwin" in sys.platform:
 
         """ OS X """
+        # Check if there is an ARM version available at scyther-mac-arm
+        # Otherwise, just fallback to the default scyther-mac which is the
+        # Intel version for backwards-compatibility reasons.
+        if platform.processor().startswith("arm"):
+            scythername = "scyther-mac-arm"
+        else:
             scythername = "scyther-mac"
 
     elif sys.platform.startswith('win'):

src/BuildMacArm.cmake

@@ -0,0 +1,10 @@
+################################################################
+# Name:		BuildMacArm.cmake
+# Purpose:	Build MacArm binary
+# Author:	Sam Jakob M.
+################################################################
+
+message (STATUS "Building Apple Mac ARM (Apple Silicon) version")
+set (scythername "scyther-mac")
+add_executable (${scythername} ${Scyther_sources})
+set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mmacosx-version-min=10.15")

src/BuildMacIntel.cmake

@@ -7,5 +7,5 @@
 message (STATUS "Building Apple Mac Intel version")
 set (scythername "scyther-mac")
 add_executable (${scythername} ${Scyther_sources})
-set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mmacosx-version-min=10.6")
-
+set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mmacosx-version-min=10.6 -arch x86_64")
+set (CMAKE_OSX_ARCHITECTURES "x86_64")

src/CMakeLists.txt

@@ -6,8 +6,7 @@
 
 # Scyther project
 project (Scyther)
-# I need 2.4 for flex/etc although it does not run yet
-CMAKE_MINIMUM_REQUIRED(VERSION 2.4)
+CMAKE_MINIMUM_REQUIRED(VERSION 2.18)
 
 # Try clang
 #set (CMAKE_C_COMPILER "clang")

src/GetOS.cmake

@@ -18,9 +18,13 @@ if (WIN32)
 else (WIN32)
 	# Not windows, is it a mac?
 	if (APPLE)
-		# TODO: A mac, but what architecture?
-		# For now we assume intel 
+        if(${CMAKE_HOST_SYSTEM_PROCESSOR} STREQUAL "arm64" AND NOT DEFINED ENV{ARCH})
+			# If Apple and Arm64, set Source_OS to MacArm
+			set(Source_OS "MacArm")
+		else(${CMAKE_HOST_SYSTEM_PROCESSOR} STREQUAL "arm64" AND NOT DEFINED ENV{ARCH})
+			# If not arm64, assume Intel for legacy reasons.
 			set(Source_OS "MacIntel")
+		endif(${CMAKE_HOST_SYSTEM_PROCESSOR} STREQUAL "arm64" AND NOT DEFINED ENV{ARCH})
 	else (APPLE)
 		# Not a mac, not windows
 		if (UNIX)

src/build.sh

@@ -5,13 +5,19 @@
 
 # Different choice if on Darwin
 PLATFORM=`uname`
-echo $PLATFORM
-if [ "$PLATFORM" = "Darwin" ]
-then
-	./subbuild-mac-intel.sh
+echo "Platform: $PLATFORM"
+
+if [ "$PLATFORM" = "Darwin" ]; then
+    ARCH=`arch`
+    echo "Architecture: $ARCH"
+
+    if [ "$ARCH" = "arm64" ]; then
+        ./subbuild-mac-arm.sh
     else
-	if [ "$PLATFORM" = "Linux" ]
-	then
+	    ./subbuild-mac-intel.sh
+    fi
+else
+	if [ "$PLATFORM" = "Linux" ]; then
 		# Build linux version
 		./subbuild-unix-unix.sh
 	else

src/subbuild-mac-arm.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+set -e
+
+# Default flags
+CMFLAGS="-D CMAKE_BUILD_TYPE:STRING=Release"
+
+# Make for intel
+cmake $CMFLAGS -D TARGETOS=MacArm . && make scyther-mac
+
+echo 
+echo
+echo "---------------------------------------------------------"
+echo "Built the Mac ARM binary"
+
+# Copy to the correct locations
+cp scyther-mac ../gui/Scyther/scyther-mac-arm
+
+echo Copied the files to their respective locations
+echo "---------------------------------------------------------"