Exclude retro_dirent.c for STATIC_LINKING targets

Makefile.common

@@ -3,7 +3,8 @@ INCFLAGS   := \
 	-I$(CORE_DIR)/libretro-common/include \
 	-I$(CORE_DIR)/include
 
-SOURCES_C := $(CORE_DIR)/libretro-common/file/retro_dirent.c \
+
+SOURCES_C :=  \
 	$(CORE_DIR)/common/cl_input.c \
 	$(CORE_DIR)/common/cd_common.c \
 	$(CORE_DIR)/common/alias_model.c \
@@ -74,4 +75,8 @@ SOURCES_C := $(CORE_DIR)/libretro-common/file/retro_dirent.c \
 	$(CORE_DIR)/common/zone.c \
 	$(CORE_DIR)/common/world.c
 
+ifneq ($(STATIC_LINKING),1)
+	SOURCES_C += $(CORE_DIR)/libretro-common/file/retro_dirent.c
+endif
+
 SOURCES_C += $(CORE_DIR)/common/net_none.c