Merge pull request #141 from liberodark/patch-1

Add RPI4 64 + N2 + OGA Support

Makefile.libretro

@@ -289,6 +289,26 @@ else ifeq ($(platform), rpi4)
         CFLAGS += -fomit-frame-pointer -ffast-math
         HAVE_NEON = 1
 
+# Raspberry Pi 4 (64-bit)
+else ifeq ($(platform), rpi4_64)
+        TARGET := $(TARGET_NAME)_libretro.so
+        fpic := -fPIC
+        SHARED := -shared -Wl,--version-script=libretro/link.T -Wl,--no-undefined
+        CFLAGS += -DARM
+        CFLAGS += -mcpu=cortex-a72 -mtune=cortex-a72 -funsafe-math-optimizations
+        CFLAGS += -fomit-frame-pointer -ffast-math
+        HAVE_NEON = 1
+
+# ODROIDN2
+else ifneq (,$(findstring CortexA73_G12B,$(platform)))
+	TARGET := $(TARGET_NAME)_libretro.so
+	fpic := -fPIC
+	SHARED := -shared -Wl,--version-script=libretro/link.T -Wl,--no-undefined
+	ARCH = arm64
+   HAVE_NEON = 1
+	CFLAGS += -fomit-frame-pointer -ffast-math -DARM -funsafe-math-optimizations
+	CFLAGS += -march=armv8-a+crc -mcpu=cortex-a73 -mtune=cortex-a73.cortex-a53
+
 # Classic Platforms ####################
 # Platform affix = classic_<ISA>_<µARCH>
 # Help at https://modmyclassic.com/comp
@@ -325,6 +345,29 @@ else ifeq ($(platform), classic_armv7_a7)
 	endif
 #######################################
 
+# (armv8 a35, hard point, neon based) ###
+# Odroid Go Advance
+else ifeq ($(platform), classic_armv8_a35)
+TARGET := $(TARGET_NAME)_libretro.so
+	fpic := -fPIC
+	SHARED := -shared -Wl,--version-script=libretro/link.T -Wl,--no-undefined
+	CFLAGS += -Ofast \
+	-flto=4 -fwhole-program -fuse-linker-plugin \
+	-fdata-sections -ffunction-sections -Wl,--gc-sections \
+	-fno-stack-protector -fno-ident -fomit-frame-pointer \
+	-falign-functions=1 -falign-jumps=1 -falign-loops=1 \
+	-fno-unwind-tables -fno-asynchronous-unwind-tables -fno-unroll-loops \
+	-fmerge-all-constants -fno-math-errno \
+	-marm -mcpu=cortex-a35 -mfpu=neon-fp-armv8 -mfloat-abi=hard
+	CXXFLAGS += $(CFLAGS)
+	CPPFLAGS += $(CFLAGS)
+	ASFLAGS += $(CFLAGS)
+	HAVE_NEON = 1
+	ARCH = arm
+	BUILTIN_GPU = neon
+	USE_DYNAREC = 1
+#########################################
+
 # Xbox 360
 else ifeq ($(platform), xenon)
 	EXT=a