Build and compare ROM in Makefile

Makefile

@@ -1,15 +1,17 @@
 REGION ?= EUR
 
 ifeq ($(REGION), EUR)
-	TARGET_SUBDIR := eur
+	REGION_NAME := eur
+	REGION_SUFFIX := P
 else
 	$(error Unknown region '$(REGION)')
 endif
 
 ROOT       := $(shell pwd)
 BUILD_DIR  := $(ROOT)/build
-TARGET_DIR := $(BUILD_DIR)/$(TARGET_SUBDIR)
+TARGET_DIR := $(BUILD_DIR)/$(REGION_NAME)
 TOOLS_DIR  := $(ROOT)/tools
+BASE_DIR   := $(ROOT)/ph_$(REGION_NAME)
 LCF_FILE   := $(BUILD_DIR)/arm9_linker_script.lcf
 OBJS_FILE  := $(BUILD_DIR)/arm9_objects.txt
 
@@ -21,6 +23,8 @@ CXX_OBJS = $(CXX_FILES:%.cpp=$(TARGET_DIR)/%.o)
 OV_BINS := $(wildcard $(TARGET_DIR)/overlays/*.bin)
 OV_LZS = $(OV_BINS:%.bin=%.lz)
 
+NDS_FILE = ph_$(REGION_NAME).nds
+
 MW_VER     := 2.0/sp1p5
 MW_ASM     := $(TOOLS_DIR)/mwccarm/$(MW_VER)/mwasmarm
 MW_CC      := $(TOOLS_DIR)/mwccarm/$(MW_VER)/mwccarm
@@ -32,11 +36,18 @@ CC_FLAGS  := -O1 -thumb -d $(REGION)
 LD_FLAGS  := -proc arm946e -nostdlib -nointerworking -nodead -m func_02000800 -map closure,unused -o main.bin -msgstyle gcc
 
 .PHONY: all
-all: tools arm9
+all: tools rom
+	sha1sum $(NDS_FILE)
+	sha1sum -c checksum.sha1
 
 .PHONY: tools
 tools:
 	cd $(TOOLS_DIR)/compress && $(MAKE)
+	cd $(TOOLS_DIR)/rom && $(MAKE)
+
+.PHONY: rom
+rom: arm9
+	$(TOOLS_DIR)/rom/buildrom -a $(BASE_DIR) -b $(TARGET_DIR) -r $(REGION_SUFFIX) -o $(NDS_FILE)
 
 .PHONY: arm9
 arm9: link

checksum.sha1

@@ -0,0 +1,3 @@
+02be55db55cf254bd064d2b3eb368b92a5b4156d ph_eur.nds
+4c8f52dd719918bbcd46e73a8bae8628139c1b85 ph_usa.nds
+53e46481deb08237354945bc63ab0b02f4de1ff4 ph_jpn.nds