RS90 support

Makefile

@@ -225,6 +225,16 @@ else ifeq ($(platform), ctr)
 	CXXFLAGS += $(CFLAGS)
 	STATIC_LINKING = 1
 
+# RS90
+else ifeq ($(platform), rs90)
+   TARGET := $(TARGET_NAME)_libretro.so
+   CC = /opt/rs90-toolchain/usr/bin/mipsel-linux-gcc
+   CXX = /opt/rs90-toolchain/usr/bin/mipsel-linux-g++
+   AR = /opt/rs90-toolchain/usr/bin/mipsel-linux-ar
+   fpic := -fPIC
+   SHARED := -shared -Wl,--no-undefined -Wl,-version-script=$(LIBRETRO_DIR)/link.T
+   FLAGS += -DDINGUX -fomit-frame-pointer -ffast-math -march=mips32 -mtune=mips32
+
 # GCW0
 else ifeq ($(platform), gcw0)
    TARGET := $(TARGET_NAME)_libretro.so