(macOS) Set up CROSS_COMPILING for ARM 64bit

Author: inactive123

Makefile

@@ -23,6 +23,9 @@ ifeq ($(platform),)
 	else ifneq ($(findstring Darwin,$(shell uname -s)),)
 		platform = osx
 		arch = intel
+		ifeq ($(shell uname -p),arm64)
+			arch = arm
+		endif
 		ifeq ($(shell uname -p),powerpc)
 			arch = ppc
 		endif
@@ -112,11 +115,18 @@ ifeq ($(arch),ppc)
 	OLD_GCC = 1
 endif
 	OSXVER = $(shell sw_vers -productVersion | cut -d. -f 2)
-	OSX_GT_MOJAVE = $(shell (( $(OSXVER) >= 14)) && echo "YES")
-ifneq ($(OSX_GT_MOJAVE),YES)
+        OSX_LT_MAVERICKS = `(( $(OSXVER) <= 9)) && echo "YES"`
+ifeq ($(OSX_LT_MAVERICKS),YES)
 	#this breaks compiling on Mac OS Mojave
 	fpic += -mmacosx-version-min=10.1
 endif
+   ifeq ($(CROSS_COMPILE),1)
+		TARGET_RULE   = -target $(LIBRETRO_APPLE_PLATFORM) -isysroot $(LIBRETRO_APPLE_ISYSROOT)
+		CFLAGS   += $(TARGET_RULE)
+		CPPFLAGS += $(TARGET_RULE)
+		CXXFLAGS += $(TARGET_RULE)
+		LDFLAGS  += $(TARGET_RULE)
+   endif
 ifndef ($(NOUNIVERSAL))
 	FLAGS += $(ARCHFLAGS)
 	LDFLAGS += $(ARCHFLAGS)