#!/usr/bin/env make
#
# IOCCC 2018 winning entry - yang

################################################################################
#
# IOCCC winning entry code may not work on your system.  What was liked/allowed
# and worked in the past may no longer be liked/allowed or compile/run today.
#
# Bug fixes, corrections and typo fixes are VERY WELCOME.  If you see a problem,
# first check this URL for a list of known bugs and (mis)features of IOCCC entries:
#
#	https://www.ioccc.org/bugs.html
#
# GitHub pull requests are welcome!  Please see the above URL for details.
#
################################################################################
#
# This file is Copyright (c) 2023 by Landon Curt Noll.  All Rights Reserved.
# You are free to share and adapt this file under the terms of this license:
#
#	Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
#
# For more information, see: https://creativecommons.org/licenses/by-sa/4.0/


#############################
# shell used by this Makefile
#############################
#
SHELL= bash

#######################
# common tool locations
#######################
#
include ../../var.mk

# Common C compiler warnings to silence
#
CSILENCE= -Wno-strict-prototypes

# Attempt to silence unknown warning option
#
CUNKNOWN= -Wno-unknown-warning-option

# Common C compiler warning flags
#
CWARN= -Wall -Wextra ${CSILENCE} ${CUNKNOWN}

# Compiler standard
#
CSTD= -std=gnu17

# Compiler bit architecture
#
ARCH=

# Defines that are needed to compile
#
CDEFINE=

# Include files that are needed to compile
#
CINCLUDE=

# Optimization
#
OPT= -O3

# Default flags for ANSI C compilation
#
CFLAGS= ${CSTD} ${CWARN} ${ARCH} ${CDEFINE} ${CINCLUDE} ${OPT}

# Libraries needed to build
#
LDFLAGS=

# C compiler to use
#
CC= cc

# Compiler add-ons or replacements for clang only
#
ifeq "$(findstring $(CLANG),${CC})" "$(CLANG)"
#
CSILENCE+= -Wno-comma -Wno-implicit-int-conversion -Wno-missing-variable-declarations \
	   -Wno-poison-system-directories -Wno-sign-conversion -Wno-unused-macros \
	   -Wno-misleading-indentation -Wno-unsafe-buffer-usage
#
CWARN+= -Weverything
#
endif

# Specific add-ons or replacements for gcc only
#
ifeq "$(findstring $(GCC),${CC})" "$(GCC)"
#
#CSILENCE+=
#
#CWARN+=
#
endif


##############################
# Special Makefile variables for this entry
##############################
#
ENTRY= yang
PROG= prog
#
OBJ= ${PROG}.o
CSRC= ${PROG}.o
DATA= obfuscation.html
TARGET= left right shift msg0 msg1 msg2
#
ALT_OBJ=
ALT_TARGET=


#################
# build the entry
#################
#
all: data ${TARGET}
	@${TRUE}

.PHONY: all alt data everything clean clobber

left: ${PROG}.c
	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}

right: generated1.c
	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}

shift: generated2.c
	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}

msg0: generated3.c
	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}

msg1: generated4.c
	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}

msg2: generated5.c
	${CC} ${CFLAGS} $< -o $@ ${LDFLAGS}

generated1.c: ${PROG}.c left
	@${RM} -f $@
	./left < $< > $@

generated2.c: ${PROG}.c right
	@${RM} -f $@
	./right < $< > $@

generated3.c: ${PROG}.c left
	@${RM} -f $@
	./left < $< | ./left > $@

generated4.c: ${PROG}.c left shift
	@${RM} -f $@
	./shift < $< | ./left > $@

generated5.c: ${PROG}.c right shift
	@${RM} -f $@
	./shift < $< | ./right > $@

########################
# detailed information #
########################

details:
	@echo "Really show the detailed information?  If you must see it run:"
	@echo
	@echo "   make i_give_up_show_me_the_details"

i_give_up_show_me_the_details: msg3 msg4 msg5 msg6 msg7 msg8 msg9

msg3: generated6.c
	$(CC) $(CFLAGS) $< -o $@

msg4: generated7.c
	$(CC) $(CFLAGS) $< -o $@

msg5: generated8.c
	$(CC) $(CFLAGS) $< -o $@

msg6: generated9.c
	$(CC) $(CFLAGS) $< -o $@

msg7: generated10.c
	$(CC) $(CFLAGS) $< -o $@

msg8: generated11.c
	$(CC) $(CFLAGS) $< -o $@

msg9: generated12.c
	$(CC) $(CFLAGS) $< -o $@

generated6.c: ${PROG}.c right left shift
	@${RM} -f $@
	./right < $< | ./shift | ./left > $@

generated7.c: ${PROG}.c right shift
	@${RM} -f $@
	./shift < $< | ./right | ./shift | ./right > $@

generated8.c: generated7.c right left shift
	@${RM} -f $@
	./shift < $< | ./right | ./shift | ./left > $@

generated9.c: generated8.c right shift
	@${RM} -f $@
	./right < $< | ./right | ./shift | ./right | ./shift | ./right > $@

generated10.c: generated9.c right left shift
	@${RM} -f $@
	./shift < $< | ./right | ./shift | ./left > $@

generated11.c: generated10.c right shift
	@${RM} -f $@
	./right < $< | ./right | ./shift | ./right | ./shift | ./right > $@

generated12.c: msg7
	./msg7 > $@

#####################################################
# final information message for the truly impatient #
#####################################################

the_last_word: msg11.txt
	@${CAT} $<

msg11.txt: msg11 ${PROG}.c
	@${RM} -f $@
	./$< < ${PROG}.c > $@

msg10: generated13.c
	$(CC) $(CFLAGS) $< -o $@

msg11: generated14.c
	$(CC) $(CFLAGS) $< -o $@

generated13.c: ${PROG}.c left shift
	./left < $< | ./left | ./left | ./shift | ./left | ./shift | ./left | ./shift | ./left > $@

generated14.c: ${PROG}.c msg10
	./msg10 < $< > $@

# alternative executable
#
alt: data ${ALT_TARGET}
	@${TRUE}

# data files
#
data: ${DATA}
	@${TRUE}

# both all and alt
#
everything: all alt
	@${TRUE}


###############
# utility rules
###############
#
clean:
	${RM} -f ${OBJ} ${ALT_OBJ}

clobber: clean
	${RM} -f ${TARGET} ${ALT_TARGET}
	${RM} -rf *.dSYM
	${RM} -f generated* msg*


######################################
# optional include of 1337 hacker rulz
######################################

-include 1337.mk ../1337.mk ../../1337.mk