Makefile

# Build options can be changed by modifying the makefile or by building with 'make SETTING=value'.
# It is also possible to override the settings in Defaults in a file called .make_options as 'SETTING=value'.

-include .make_options

#### Defaults ####

# select the version and binaries of IDO toolchain to disassemble and build
VERSION ?= 7.1
# if WERROR is 1, pass -Werror to CC_CHECK, so warnings would be treated as errors
WERROR ?= 0
CC_CHECK_COMP ?= gcc

ifeq ($(VERSION),7.1)
	IDO_VERSION := IDO_71
#	IDO_TC      := cc acpp as0 as1 cfe copt ugen ujoin uld umerge uopt upas usplit
	IDO_TC      := cc cfe ugen as1 umerge as0 uopt
else ifeq ($(VERSION),5.3)
	IDO_VERSION := IDO_53
#	IDO_TC      := cc acpp as0 as1 cfe copt ld ugen ujoin uld umerge uopt usplit
	IDO_TC      := cc cfe as0
else
$(error Unknown or unsupported IDO version - $(VERSION))
endif


#### Tools ####
MIPS_BINUTILS_PREFIX ?= mips-linux-gnu-
ifneq ($(shell type $(MIPS_BINUTILS_PREFIX)ld >/dev/null 2>/dev/null; echo $$?), 0)
$(error Please install or build mips-linux-gnu)
endif

UNAME_S := $(shell uname -s)
ifeq ($(UNAME_S),Linux)
  DETECTED_OS=linux
else ifeq ($(UNAME_S),Darwin)
  DETECTED_OS=macos
else
  $(error Unsupported OS: $(UNAME_S))
endif

ROOTDIR := $(CURDIR)

RECOMP_VERSION := v1.2
RECOMP         := $(ROOTDIR)/tools/ido_recomp

BUILD   := build
ASM     := asm
SYMBOLS := symbols
CONTEXT := context
YACCDIR := tools/yacc

ifeq ($(VERSION),7.1)
        CC	:= $(RECOMP)/7.1/cc
else ifeq ($(VERSION),5.3)
        CC  := $(RECOMP)/5.3/cc
endif


AS         := $(MIPS_BINUTILS_PREFIX)as
LD         := $(MIPS_BINUTILS_PREFIX)ld
OBJCOPY    := $(MIPS_BINUTILS_PREFIX)objcopy
OBJDUMP    := $(MIPS_BINUTILS_PREFIX)objdump
MIPS_GCC   := $(MIPS_BINUTILS_PREFIX)gcc

DISASSEMBLER  := python3 -m spimdisasm.elfObjDisasm
DISASSEMBLER_FLAGS += --no-emit-cpload --Mreg-names o32 --no-use-fpccsr --rodata-string-guesser 4 --pascal-rodata-string-guesser 4 --print-new-file-boundaries --asm-jtbl-label jlabel --asm-data-label dlabel
ASM_PROCESSOR := python3 $(ROOTDIR)/tools/asm-processor/build.py
YACC := $(YACCDIR)/yacc
YFLAGS := -p $(YACCDIR)/yaccpar -t


IINC       := -I$(ROOTDIR)/include -I$(ROOTDIR)/include/indy -I$(ROOTDIR)/src

# Check code syntax with host compiler
CHECK_WARNINGS := -Wall -Wextra -Wno-unknown-pragmas -Wno-unused-variable -Wno-char-subscripts -Wno-unused-label -Wno-parentheses -Wno-unused-parameter -Wno-pointer-sign -Wno-switch
# Have CC_CHECK pretend to be a MIPS compiler
MIPS_BUILTIN_DEFS := -D_MIPS_FPSET=16 -D_MIPS_ISA=2 -D_ABIO32=1 -D_MIPS_SIM=_ABIO32 -D_MIPS_SZINT=32 -D_MIPS_SZLONG=32 -D_MIPS_SZPTR=32
MIPS_BUILTIN_DEFS += -D__EXTENSIONS__ -DLANGUAGE_C -D_LANGUAGE_C -D__INLINE_INTRINSICS
MIPS_BUILTIN_DEFS += -Dsgi -D__sgi -Dunix -Dmips -Dhost_mips -D__unix -D__host_mips -D_SVR4_SOURCE
MIPS_BUILTIN_DEFS += -D_MODERN_C -D_SGI_SOURCE -D__DSO__ -DSYSTYPE_SVR4 -D_SYSTYPE_SVR4 -D_LONGLONG
MIPS_BUILTIN_DEFS += -D__mips=2 -D_MIPSEB -DMIPSEB -D_CFE
MIPS_BUILTIN_DEFS += -DPERMUTER=1
#	The -MMD flags additionaly creates a .d file with the same name as the .o file.
CC_CHECK          := $(CC_CHECK_COMP)
CC_CHECK_FLAGS    := -MMD -fno-builtin -fsyntax-only -funsigned-char -std=c11 -m32 -DNON_MATCHING -DCC_CHECK=1
ifneq ($(WERROR), 0)
	CHECK_WARNINGS += -Werror
endif


LDFLAGS := -nostdlib -L$(RECOMP)/ido/$(VERSION)/usr/lib/ -lc


ASMPROCFLAGS := 
OPTFLAGS := -O1
MIPS_VERSION := -mips2
ASFLAGS := -march=vr4300 -32 -Iinclude -KPIC

IDO_WARNINGS := -fullwarn -woff 624,649,838,712,835
CFLAGS += -G 0 -KPIC -Xcpluscomm $(IINC) -nostdinc -Wab,-r4300_mul $(IDO_WARNINGS) -D$(IDO_VERSION)


# -- Location of original IDO binaries

IRIX_BASE    ?= ido
IRIX_USR_DIR ?= $(IRIX_BASE)/$(VERSION)/usr

# We use a sentinel file for disassembling each binary
DISASM_TARGETS := $(foreach binary,$(IDO_TC),$(ASM)/$(VERSION)/$(binary)/.disasm)


SRC_DIRS := $(shell find src -type d)
ASM_DIRS := $(shell find asm/$(VERSION) -type d -not -path "asm/$(VERSION)/functions*")

C_FILES  := $(foreach dir,$(SRC_DIRS),$(wildcard $(dir)/*.c))
P_FILES  := $(foreach dir,$(SRC_DIRS),$(wildcard $(dir)/*.p)) # Pascal files

S_FILES  := $(foreach dir,$(ASM_DIRS),$(wildcard $(dir)/*.s))
COMBINED_S_FILES := $(sort $(foreach file, $(S_FILES:.s=), $(basename $(file))))

Y_FILES  := $(foreach dir,$(SRC_DIRS),$(wildcard $(dir)/*.y))

O_FILES  := $(Y_FILES:src/%.y=$(BUILD)/src/$(VERSION)/%.o) \
            $(C_FILES:src/%.c=$(BUILD)/src/$(VERSION)/%.o) \
            $(P_FILES:src/%.p=$(BUILD)/src/$(VERSION)/%.o) \
            $(COMBINED_S_FILES:asm/$(VERSION)/%=$(BUILD)/asm/$(VERSION)/%.o)

# Automatic dependency files
DEP_FILES := $(O_FILES:.o=.d) \
             $(O_FILES:.o=.asmproc.d)

# create build directories
$(shell mkdir -p $(SRC_DIRS:src/%=$(BUILD)/src/$(VERSION)/%) $(ASM_DIRS:asm/$(VERSION)/%=$(BUILD)/asm/$(VERSION)/%))

$(BUILD)/src/%.o: CC_NO_ASMPROC := $(CC)
$(BUILD)/src/%.o: CC = $(ASM_PROCESSOR) $(ASM_PROC_FLAGS) $(CC_NO_ASMPROC) -- $(AS) $(ASFLAGS) --


build/src/7.1/mld/%.o: OPTFLAGS := -O2
build/src/7.1/as0/%.o: OPTFLAGS := -O2
build/src/7.1/as1/%.o: OPTFLAGS := -O2
build/src/7.1/cfe/%.o: OPTFLAGS := -O2
build/src/7.1/ugen/%.o: OPTFLAGS := -O2 -Olimit 1600
build/src/7.1/libu/%.o: OPTFLAGS := -O2

# Targets

.PHONY: all clean distclean setup disasm
.DEFAULT_GOAL:= all

all: $(ELFS) $(O_FILES)
	./tools/diff_objfiles.py $(VERSION)

clean:
	$(RM) -r $(BUILD)
	$(RM) $(Y_FILES:.y=.c)

distclean: clean
	$(RM) -r $(RECOMP) $(ASM) $(YACC)

setup: $(RECOMP) $(YACC)

yacc: $(YACC)

disasm: $(DISASM_TARGETS)
	find asm -type f -name "*.s" | grep -v "/functions/" | xargs sed -i -e "s/glabel func_/llabel func_/; s/dlabel RO_/llabel RO_/; s/dlabel B_/llabel B_/; s/dlabel D_/llabel D_/; s/dlabel jtbl_/llabel jtbl_/;"


$(RECOMP):
	mkdir -p $@/5.3 $@/7.1
	curl -sL https://github.com/decompals/ido-static-recomp/releases/download/$(RECOMP_VERSION)/ido-5.3-recomp-$(DETECTED_OS).tar.gz | tar xz -C $@/5.3
	curl -sL https://github.com/decompals/ido-static-recomp/releases/download/$(RECOMP_VERSION)/ido-7.1-recomp-$(DETECTED_OS).tar.gz | tar xz -C $@/7.1

$(YACC):
	gcc -std=c99 $(YACCDIR)/*.c -o $(YACC)

$(BUILD)/$(ASM)/$(VERSION)/%.elf: $(O_FILES)
	$(LD) $(BUILD)/$(ASM)/$(VERSION)/$*/*.o $(LDFLAGS) --no-check-sections --accept-unknown-input-arch --allow-shlib-undefined -Map $(BUILD)/$(ASM)/$(VERSION)/$*.map -o $@ || (rm -f $@ && exit 1)

$(BUILD)/$(ASM)/%.o: $(ASM)/%.*.s
	$(AS) $(ASFLAGS) $^ -o $@

$(BUILD)/src/$(VERSION)/%.o: src/%.c
	$(CC_CHECK) $(CC_CHECK_FLAGS) $(IINC) $(CHECK_WARNINGS) $(MIPS_BUILTIN_DEFS) -o $@ $<
	$(CC) -c $(CFLAGS) $(MIPS_VERSION) $(OPTFLAGS) -o $@ $<

$(BUILD)/src/$(VERSION)/%.o: src/%.p
	@if [ "$(CC)" != "@:" ]; then \
		(cd $(dir $<) && $(CC_NO_ASMPROC) -c $(CFLAGS) $(MIPS_VERSION) $(OPTFLAGS) -o $(abspath $@) $(notdir $<)); \
	fi

%.c: %.y
	$(YACC) $(YFLAGS) $<
	mv y.tab.c $@

## Disassembly

# cc is special and is stored in a different folder
$(ASM)/$(VERSION)/cc/.disasm: $(IRIX_USR_DIR)/bin/cc
	$(DISASSEMBLER) $(DISASSEMBLER_FLAGS) --file-splits $(SYMBOLS)/$(VERSION)/cc.splits.csv --split-functions $(ASM)/$(VERSION)/functions/cc --save-context $(CONTEXT)/$(VERSION)/cc.csv $< $(dir $@)

$(ASM)/$(VERSION)/%/.disasm:
	$(DISASSEMBLER) $(DISASSEMBLER_FLAGS) --file-splits $(SYMBOLS)/$(VERSION)/$*.splits.csv --split-functions $(ASM)/$(VERSION)/functions/$* --save-context $(CONTEXT)/$(VERSION)/$*.csv $(IRIX_USR_DIR)/lib/$* $(ASM)/$(VERSION)/$*

print-% : ; $(info $* is a $(flavor $*) variable set to [$($*)]) @true

-include $(DEP_FILES)