Create linux-portable target (works)

Makefile.libretro

@@ -17,12 +17,20 @@ endif
 endif
 
 TARGET_NAME := 2048
-
+LIBM := -lm
 fpic=
+
+
 ifeq ($(platform), unix)
    TARGET := $(TARGET_NAME)_libretro.so
    fpic := -fPIC
    SHARED := -shared -Wl,--no-undefined
+else ifeq ($(platform), linux-portable)
+   TARGET := $(TARGET_NAME)_libretro.so
+   fpic := -fPIC -nostdlib
+   SHARED := -shared -Wl,--no-undefined
+	LIBM :=
+	LDFLAGS += -L. -lmusl
 else ifeq ($(platform), osx)
    TARGET := $(TARGET_NAME)_libretro.dylib
    fpic := -fPIC
@@ -83,7 +91,7 @@ CFLAGS += -Wall -pedantic $(fpic) $(PLATFORM_DEFINES)
 
 CFLAGS += 
 LFLAGS := 
-LIBS := -lm
+LDFLAGS += $(LIBM)
 
 ifeq ($(platform), qnx)
    CFLAGS += -Wc,-std=gnu99
@@ -115,7 +123,7 @@ $(TARGET): $(OBJECTS)
 ifeq ($(STATIC_LINKING), 1)
 	$(AR) rcs $@ $(OBJECTS)
 else
-	$(CC) $(fpic) $(SHARED) $(INCLUDES) $(LFLAGS) -o $@ $(OBJECTS) $(LIBS)
+	$(CC) $(fpic) $(SHARED) $(INCLUDES) $(LFLAGS) -o $@ $(OBJECTS) $(LDFLAGS)
 endif
 
 %.o: %.c