Index: Makefile.libretro
--- Makefile.libretro.orig
+++ Makefile.libretro
@@ -89,7 +89,7 @@ endif
 ifneq (,$(findstring unix,$(platform)))
    TARGET := $(TARGET_NAME)_libretro.so
    fpic := -fPIC
-   SHARED := -shared -Wl,-version-script=$(BUILD_DIR)/link.T -Wl,-no-undefined
+   SHARED := -shared $(fpic) -Wl,-version-script=$(BUILD_DIR)/link.T
 
 # OS X
 else ifeq ($(platform), osx)
@@ -298,8 +298,8 @@ else ifeq ($(platform), emscripten)
    CXXFLAGS += -O2 -fno-exceptions -fno-rtti -DHAVE_STDINT_H -DNDEBUG
    OBJS += $(SOURCES_LUA_C:.c=.o)
 else
-   CFLAGS += -O3 -DNDEBUG
-   CXXFLAGS += -O3 -fno-exceptions -fno-rtti -DHAVE_STDINT_H -DNDEBUG
+   CFLAGS += -DNDEBUG
+   CXXFLAGS += -fno-exceptions -fno-rtti -DHAVE_STDINT_H -DNDEBUG
    OBJS += $(SOURCES_LUA_C:.c=.o)
 endif