(macOS) Set up CROSS_COMPILING for ARM 64bit

.gitlab-ci.yml

@@ -33,6 +33,10 @@ include:
   - project: 'libretro-infrastructure/ci-templates'
     file: '/osx-x64.yml'
 
+  # MacOS ARM 64-bit
+  - project: 'libretro-infrastructure/ci-templates'
+    file: '/osx-arm64.yml'
+
   ################################## CELLULAR ################################
   # Android
   - project: 'libretro-infrastructure/ci-templates'
@@ -125,6 +129,12 @@ libretro-build-osx-x64:
     - .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
 android-armeabi-v7a:

Makefile.libretro

@@ -20,10 +20,13 @@ ifeq ($(platform),)
       platform = win
    else ifneq ($(findstring Darwin,$(shell uname -s)),)
       platform = osx
-		arch = intel
-		ifeq ($(shell uname -p),powerpc)
-			arch = ppc
-		endif
+      arch = intel
+      ifeq ($(shell uname -p),arm64)
+	arch = arm
+      endif
+      ifeq ($(shell uname -p),powerpc)
+	arch = ppc
+      endif
    else ifneq ($(findstring win,$(shell uname -s)),)
       platform = win
    endif
@@ -133,10 +136,18 @@ else ifeq ($(platform), osx)
    fpic := -fPIC
    SHARED := -dynamiclib
 	OSXVER = $(shell sw_vers -productVersion | cut -d. -f 2)
-	OSX_GT_MOJAVE = $(shell (( $(OSXVER) >= 14)) && echo "YES")
-ifneq ($(OSX_GT_MOJAVE),YES)
-   fpic += -mmacosx-version-min=10.1
-endif
+   OSX_LT_MAVERICKS = `(( $(OSXVER) <= 9)) && echo "YES"`
+   ifeq ($(OSX_LT_MAVERICKS),YES)
+   	   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))
       CFLAGS += $(ARCHFLAGS)
       CXXFLAGS += $(ARCHFLAGS)