tools: Add mailutil groundwork

Signed-off-by: Ian Moffett <ian@mirocom.org>

tools/mailutil/Makefile

@@ -0,0 +1,34 @@
+#
+# Copyright (c) 2026, Chloe Moffett
+# Provided under the BSD-3 clause
+#
+
+CFILES = $(shell find . -name "*.c")
+OFILES = $(CFILES:.c=.o)
+OFILES += $(shell find ../../libremail/ -name "*.o")
+DFILES = $(CFILES:.c=.d)
+
+OUTPUT = ../../bin/mailutil
+CC = gcc
+
+CFLAGS = 				\
+	-Wall				\
+	-pedantic			\
+	-MMD				\
+	-Iinc				\
+	-I../../libremail/inc
+
+.PHONY: all
+all: $(OUTPUT) $(OFILES)
+
+.PHONY: $(OUTPUT)
+$(OUTPUT): $(OFILES)
+	$(CC) $^ -o $@
+
+-include $(DFILES)
+%.o: %.c
+	$(CC) -c $< $(CFLAGS) -o $@
+
+.PHONY: clean
+clean:
+	rm -f $(OFILES) $(DFILES)