1 files changed, 3 insertions, 2 deletions

diff --git a/Makefile b/Makefile
index f39a14c..7b23968 100644
--- a/Makefile
+++ b/Makefile
@@ -46,11 +46,12 @@ all: libraries executables
 EXECUTABLES :=
 LIBRARIES   :=
 
-SDL_CONFIG ?= $(PREBUILT)/sdl/bin/sdl-config
+ifneq ($(SDL_CONFIG),)
 SDL_LIBS   := $(filter %.a,$(shell $(SDL_CONFIG) --static-libs))
 $(foreach lib,$(SDL_LIBS), \
     $(eval $(call copy-prebuilt-lib,$(lib))) \
 )
+endif
 
 clean: clean-intermediates
 
@@ -70,4 +71,4 @@ clean-config:
 
 # include dependency information
 DEPENDENCY_DIRS := $(sort $(DEPENDENCY_DIRS))
--include $(wildcard $(DEPENDENCY_DIRS:%=%/*.d))
\ No newline at end of file
+-include $(wildcard $(DEPENDENCY_DIRS:%=%/*.d))