(macOS) Add 64bit ARM MacOS support

.gitlab-ci.yml

@@ -34,6 +34,10 @@ include:
   # MacOS 64-bit
   - project: 'libretro-infrastructure/ci-templates'
     file: '/osx-x64.yml'
+
+  # MacOS ARM 64-bit
+  - project: 'libretro-infrastructure/ci-templates'
+    file: '/osx-arm64.yml'
     
   ################################## CELLULAR ################################
   # Android
@@ -93,6 +97,12 @@ libretro-build-osx-x64:
   extends:
     - .libretro-osx-x64-make-default
     - .core-defs
+
+# MacOS ARM 64-bit
+libretro-build-osx-arm64:
+  extends:
+    - .libretro-osx-arm64-make-default
+    - .core-defs
     
 ################################### CELLULAR #################################
 # Android ARMv7a

src/libretro/Makefile

@@ -20,6 +20,9 @@ else ifneq ($(findstring MINGW,$(shell uname -a)),)
 else ifneq ($(findstring Darwin,$(shell uname -a)),)
 	platform = osx
 	arch = intel
+ifeq ($(shell uname -p),arm)
+	arch = arm
+endif
 ifeq ($(shell uname -p),powerpc)
 	arch = ppc
 endif
@@ -36,6 +39,9 @@ EXE_EXT = .exe
 else ifneq ($(findstring Darwin,$(shell uname -a)),)
 	system_platform = osx
 	arch = intel
+ifeq ($(shell uname -p),arm)
+	arch = arm
+endif
 ifeq ($(shell uname -p),powerpc)
 	arch = ppc
 endif
@@ -138,11 +144,24 @@ else ifeq ($(platform), osx)
 	endif
 	OSXVER = `sw_vers -productVersion | cut -d. -f 2`
 	OSX_LT_MAVERICKS = `(( $(OSXVER) <= 9)) && echo "YES"`
+	MINVERSION =
 ifeq ($(OSX_LT_MAVERICKS),"YES")
-	fpic += -mmacosx-version-min=10.2
+	MINVERSION = -mmacosx-version-min=10.2
 else
-	fpic += -mmacosx-version-min=10.7 -stdlib=libc++
+	MINVERSION = -mmacosx-version-min=10.7
 endif
+ifeq ($(shell uname -p),arm)
+	MINVERSION =
+endif
+   ifeq ($(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)
+		MINVERSION =
+   endif
+	fpic += $(MINVERSION) -stdlib=libc++
 	SHARED := -dynamiclib
 	TILED_RENDERING=1