1 files changed, 4 insertions, 1 deletions
diff --git a/include.mk b/include.mk
index cff83b7..d47827c 100644
--- a/include.mk
+++ b/include.mk
@@ -24,6 +24,9 @@ ifndef SPREADAVR_PATH
 SPREADAVR_PATH := ..
 endif
 include $(SPREADAVR_PATH)/defines.mk
+ifndef MCU
+$(error Unknown board: '$(BOARD_TYPE)')
+endif
 
 ## project-specific objects
 SRC := $(OBJ:%.o=%.c)
@@ -252,7 +255,7 @@ lib-%.o: $(LIB_DIR)/%.cpp Makefile
 	$(CXX) $(CXXFLAGS) -c $< -o $@
 
 $(ELFFILE): $(OBJ_LIB) $(CXX_OBJ_LIB) $(EXTERNAL_LIBS:%=lib%.a) $(OBJ) $(CXX_OBJ)
-	$(CC) $(LDFLAGS) $(OBJ) $(CXX_OBJ) $(OBJ_LIB)  $(CXX_OBJ_LIB) $(EXTERNAL_LIBS:%=-l%) -o $@
+	$(CC) $(LDFLAGS) $(OBJ) $(CXX_OBJ) $(OBJ_LIB) $(CXX_OBJ_LIB) $(EXTERNAL_LIBS:%=-l%) -o $@
 	$(SIZE) $@
 	@echo ""