--- a/libretro/Makefile.libretro	2018-08-15 16:42:50.000000000 +0200
+++ b/libretro/Makefile.libretro	2018-08-16 16:22:53.958591362 +0200
@@ -268,8 +268,8 @@

 OBJECTS = $(SOURCES_CXX:.cpp=.o) $(SOURCES_C:.c=.o)
 OBJECT_DEPS = $(OBJECTS:.o=.d)
-CXXFLAGS += -D__LIBRETRO__ -MMD $(fpic) $(INCFLAGS) $(COMMONFLAGS)
-CFLAGS += -D__LIBRETRO__ -MMD $(fpic) $(INCFLAGS) $(COMMONFLAGS)
+CXXFLAGS += -D__LIBRETRO__ -MMD $(fpic) $(INCFLAGS) $(COMMONFLAGS) `sdl-config --cflags`
+CFLAGS += -D__LIBRETRO__ -MMD $(fpic) $(INCFLAGS) $(COMMONFLAGS) `sdl-config --cflags`
 LDFLAGS += -lm $(fpic)

 .PHONY: all