Add native support for Apple Silicon

src/main/c/Posix/Makefile

@@ -6,6 +6,7 @@ COMPILE_ARM64				:= aarch64-unknown-linux-gnueabi-gcc
 COMPILE_SOLARIS_X86			:= x86_64-sun-solaris2.10-gcc
 COMPILE_SOLARIS_SPARC		:= sparc-sun-solaris2.10-gcc
 COMPILE_APPLE				:= /usr/local/bin/gcc-9
+COMPILE_APPLE_AARCH64		:= /usr/bin/gcc
 LINK						:= gcc
 LINK_ARM32					:= arm32-unknown-linux-gnueabi-gcc
 LINK_ARM32HF				:= arm32hf-unknown-linux-gnueabi-gcc
@@ -13,16 +14,20 @@ LINK_ARM64					:= aarch64-unknown-linux-gnueabi-gcc
 LINK_SOLARIS_X86			:= x86_64-sun-solaris2.10-gcc
 LINK_SOLARIS_SPARC			:= sparc-sun-solaris2.10-gcc
 LINK_APPLE					:= /usr/local/bin/gcc-9
+LINK_APPLE_AARCH64			:= /usr/bin/gcc
 CFLAGS						:= -fPIC -Os -flto -static-libgcc -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
 CFLAGS_POSIX				:= -fuse-linker-plugin
 CFLAGS_APPLE				:= 
+CFLAGS_APPLE_AARCH64		:= -fPIC -Os -flto -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
 LDFLAGS						:= -Os -flto -static-libgcc
 LDFLAGS_POSIX				:= -shared -fuse-linker-plugin -s
 LDFLAGS_APPLE				:= -dynamiclib
+LDFLAGS_APPLE_AARCH64		:= -Os -flto -dynamiclib
 JDK_HOME					:= $(shell if [ "`uname`" = "Darwin" ]; then echo "`/usr/libexec/java_home`"; else echo "$$JDK_HOME"; fi)
 INCLUDES					:= -I"$(JDK_HOME)/include" -I"$(JDK_HOME)/include/linux" -I"$(JDK_HOME)/include/darwin" -I"$(JDK_HOME)/include/solaris"
 LIBRARIES_POSIX				:=
 LIBRARIES_APPLE				:= -framework Cocoa -framework IOKit -framework JavaVM
+LIBRARIES_APPLE_AARCH64		:= -framework Cocoa -framework IOKit
 DELETE						:= @rm
 MKDIR						:= @mkdir
 COPY						:= @cp
@@ -53,6 +58,7 @@ OBJECTSsolaris64			:= $(BUILD_DIR)/solaris_x86_64/SerialPort_Posix.o $(BUILD_DIR
 OBJECTSsolarisSparc32		:= $(BUILD_DIR)/solaris_sparc32/SerialPort_Posix.o $(BUILD_DIR)/solaris_sparc32/PosixHelperFunctions.o
 OBJECTSsolarisSparc64		:= $(BUILD_DIR)/solaris_sparc64/SerialPort_Posix.o $(BUILD_DIR)/solaris_sparc64/PosixHelperFunctions.o
 OBJECTSosx64				:= $(BUILD_DIR)/osx_x86_64/SerialPort_Posix.o $(BUILD_DIR)/osx_x86_64/PosixHelperFunctions.o
+OBJECTSosxaarch64			:= $(BUILD_DIR)/osx_aarch64/SerialPort_Posix.o $(BUILD_DIR)/osx_aarch64/PosixHelperFunctions.o
 CPATH_APPLE					:= /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/usr/include
 FLAGSlinux32				:= -m32
 FLAGSlinux64				:= -m64
@@ -68,6 +74,7 @@ FLAGSsolaris64				:= -m64
 FLAGSsolarisSparc32			:= -mno-app-regs -mcpu=v8 -mv8plus -m32
 FLAGSsolarisSparc64			:= -mno-app-regs -mcpu=v9 -m64
 FLAGSosx64					:= -m64
+FLAGSosxaarch64				:= 
 JNI_HEADER					:= ../com_fazecast_jSerialComm_SerialPort.h
 JAVA_CLASS					:= $(JAVA_CLASS_DIR)/SerialPort.class
 
@@ -103,6 +110,11 @@ osx : osx64
 	$(DELETE) -rf "$(BUILD_DIR)"
 	$(DELETE) -rf ../*.h
 
+# Build all OSX (Apple Silicon) libraries
+osx_aarch64 : osxaarch64
+	$(DELETE) -rf "$(BUILD_DIR)"
+	$(DELETE) -rf ../*.h
+
 # Build architecture-specific Linux libraries
 linux32 : $(JAVA_CLASS_DIR) $(BUILD_DIR)/linux_x86 $(BUILD_DIR)/linux_x86/$(LIBRARY_NAME_POSIX)
 	$(DELETE) -rf $(BUILD_DIR)/linux_x86/*.o
@@ -152,7 +164,11 @@ solarisSparc64 : $(JAVA_CLASS_DIR) $(BUILD_DIR)/solaris_sparc64 $(BUILD_DIR)/sol
 osx64 : $(JAVA_CLASS_DIR) $(BUILD_DIR)/osx_x86_64 $(BUILD_DIR)/osx_x86_64/$(LIBRARY_NAME_APPLE)
 	$(DELETE) -rf $(BUILD_DIR)/osx_x86_64/*.o
 	$(COPY) $(BUILD_DIR)/osx_x86_64/*.* $(RESOURCE_DIR_OSX)/x86_64
-	
+
+osxaarch64 : $(JAVA_CLASS_DIR) $(BUILD_DIR)/osx_aarch64 $(BUILD_DIR)/osx_aarch64/$(LIBRARY_NAME_APPLE)
+	$(DELETE) -rf $(BUILD_DIR)/osx_aarch64/*.o
+	$(COPY) $(BUILD_DIR)/osx_aarch64/*.* $(RESOURCE_DIR_OSX)/aarch64
+
 # Rule to create build directories
 $(BUILD_DIR)/linux_x86 :
 	$(MKDIR) -p $@
@@ -182,6 +198,8 @@ $(BUILD_DIR)/solaris_sparc64 :
 	$(MKDIR) -p $@
 $(BUILD_DIR)/osx_x86_64 :
 	$(MKDIR) -p $@
+$(BUILD_DIR)/osx_aarch64 :
+	$(MKDIR) -p $@
 $(JAVA_CLASS_DIR) :
 	$(MKDIR) -p $@
 
@@ -214,6 +232,8 @@ $(BUILD_DIR)/solaris_sparc64/$(LIBRARY_NAME_POSIX) : $(JNI_HEADER) $(OBJECTSsola
 	$(LINK_SOLARIS_SPARC) $(LDFLAGS) $(LDFLAGS_POSIX) $(FLAGSsolarisSparc64) -o $@ $(OBJECTSsolarisSparc64) $(LIBRARIES_POSIX)
 $(BUILD_DIR)/osx_x86_64/$(LIBRARY_NAME_APPLE) : $(JNI_HEADER) $(OBJECTSosx64)
 	$(LINK_APPLE) $(LDFLAGS) $(LDFLAGS_APPLE) $(FLAGSosx64) -o $@ $(OBJECTSosx64) $(LIBRARIES_APPLE)
+$(BUILD_DIR)/osx_aarch64/$(LIBRARY_NAME_APPLE) : $(JNI_HEADER) $(OBJECTSosxaarch64)
+	$(LINK_APPLE_AARCH64) $(LDFLAGS_APPLE_AARCH64) $(FLAGSosxaarch64) -o $@ $(OBJECTSosxaarch64) $(LIBRARIES_APPLE_AARCH64)
 
 # Suffix rules to get from *.c -> *.o
 $(BUILD_DIR)/linux_x86/%.o : %.c
@@ -244,6 +264,8 @@ $(BUILD_DIR)/solaris_sparc64/%.o : %.c
 	$(COMPILE_SOLARIS_SPARC) $(INCLUDES) $(CFLAGS) $(CFLAGS_POSIX) $(FLAGSsolarisSparc64) -c $< -o $@
 $(BUILD_DIR)/osx_x86_64/%.o : %.c
 	CPATH=$(CPATH_APPLE) $(COMPILE_APPLE) $(INCLUDES) $(CFLAGS) $(CFLAGS_APPLE) $(FLAGSosx64) -c $< -o $@
+$(BUILD_DIR)/osx_aarch64/%.o : %.c
+	CPATH=$(CPATH_APPLE) $(COMPILE_APPLE_AARCH64) $(INCLUDES) $(CFLAGS_APPLE_AARCH64) $(FLAGSosxaarch64) -c $< -o $@
 
 # Rule to build JNI header file
 $(JNI_HEADER) : $(JAVA_CLASS)

src/main/java/com/fazecast/jSerialComm/SerialPort.java

@@ -105,7 +105,9 @@ public final class SerialPort
 		}
 		else if (OS.indexOf("mac") >= 0)
 		{
-			if (System.getProperty("os.arch").indexOf("64") >= 0)
+			if (System.getProperty("os.arch").equals("aarch64")) 
+				libraryPath = "OSX/aarch64";
+			else if (System.getProperty("os.arch").indexOf("64") >= 0)
 				libraryPath = "OSX/x86_64";
 			else
 				libraryPath = "OSX/x86";