fix: use CC instead of LD, and deprecate LD

this is a bit confusing, since setting `LD=cc` would have the same
issue; `ld: -f may not be used without -shared`. So I've got no idea
what is going wrong, I guess it's something funky.
This works, so we shall stick with this.

Makefile

@@ -5,7 +5,6 @@
 NAME    = mcaselector-lite
 DEBUG   ?= 0
 CC      ?= cc
-LD      ?= ld
 
 # setting default compilation flags
 # some of which are able to be overwritten, others are always appended
@@ -69,13 +68,13 @@ lib/obj/%/: lib/%/
 bin/$(NAME): $(OBJ)
 	$(info [LD]	$@)
 	@mkdir -p $(@D)
-	@$(LD) -o $@ $^ $(LDFLAGS) $(LDLIBS)
+	@$(CC) -o $@ $^ $(LDFLAGS) $(LDLIBS)
 
 # link together a testing binary
 bin/TEST_$(NAME): $(TOBJ) $(filter-out obj/src/main.o,$(OBJ))
 	$(info [LD]	$@)
 	@mkdir -p $(@D)
-	@$(LD) -o $@ $^ $(LDFLAGS) $(LDLIBS)
+	@$(CC) -o $@ $^ $(LDFLAGS) $(LDLIBS)
 
 obj/res/%.c: res/%
 	$(info [XXD]	$@)