build: Make builds more modular

Signed-off-by: Chloe M. <chloe@mensia.org>

Makefile

@@ -2,28 +2,13 @@
 # Copyright (c) 2026, Chloe M.
 # Provided under the BSD-3 clause
 #
-# Description: CUMHOLE build script
+# Description: Top-level build script
 # Author: 	   Chloe M.
 #
 
-.SILENT:
-PROMPT := printf "%s\t\t%s\n"
-
-CC = gcc
-CFILES = $(shell find . -name "*.c")
-OFILES = $(CFILES:.c=.o)
-
-CFLAGS =		\
-	-Wall		\
-	-pedantic
-
 .PHONY: all
-all: hole
+all: core
 
-.PHONY: hole
-hole: $(OFILES)
-	$(CC) $^ -o $@
-
-%.o: %.c
-	$(PROMPT) "CC" $<
-	$(CC) -c $(CFLAGS) $< -o $@
+.PHONY: core
+core:
+	cd core/; $(MAKE)

core/Makefile

@@ -0,0 +1,23 @@
+#
+# Copyright (c) 2026, Chloe M.
+# Provided under the BSD-3 clause
+#
+# Description: CUMHOLE build script
+# Author: 	   Chloe M.
+#
+
+include ../mk/global.mk
+.SILENT:
+
+CFILES = $(shell find . -name "*.c")
+OFILES = $(CFILES:.c=.o)
+
+.PHONY: all
+all: ../hole
+
+.PHONY: hole
+../hole: $(OFILES)
+	$(CC) $^ -o $@
+
+%.o: %.c
+	$(CC) -c $(CFLAGS) $< -o $@

mk/global.mk

@@ -0,0 +1,12 @@
+#
+# Copyright (c) 2026, Chloe M.
+# Provided under the BSD-3 clause
+#
+# Description: CUMHOLE global vars
+# Author: 	   Chloe M.
+#
+
+CC = gcc
+CFLAGS =		\
+	-Wall		\
+	-pedantic