use gcc not ld, don't compile surface.c yet

Makefile

@@ -27,8 +27,8 @@ all: tests
 .PHONY: tests
 tests: $(BIN) $(BIN)/ct_test
 
-$(BIN)/ct_test: $(BUILD) $(addprefix $(BUILD)/, ct_test.o term.o surface.o)
-	$(LD) -o $@ $(filter %.o, $^)
+$(BIN)/ct_test: $(BUILD) $(addprefix $(BUILD)/, ct_test.o term.o termio.o)
+	$(LD) $(LDFLAGS) -o $@ $(filter %.o, $^)
 
 $(BUILD)/%.o: $(SRC)/%.c
 	$(CC) $(CFLAGS) -o $@ -c $^

config.mk

@@ -6,8 +6,8 @@ CFLAGS := -Wall -Wextra -O
 CDEBUG := -g
 
 # === Linker Configuration ===
-LD := ld
-LDFLAGS :=
+LD := gcc
+LDFLAGS := -lc
 
 # === GNU Make Configuration ===
 # GMAKE_JOBS defaults to the number of available logical processors