# Squashfs-tools 4.6.1 release
RELEASE_VERSION = 4.6.1
RELEASE_DATE = 2023/03/25
###############################################
#                Build options                #
###############################################
#
# Edit the following definitions to customise the build, or run
# "CONFIG=1 make" with the build options below to customise the build on
# the command line.
#
ifndef CONFIG
############# Building gzip support ###########
#
# Gzip support is by default enabled, and the compression type default
# (COMP_DEFAULT) is gzip.
#
# If you don't want/need gzip support then comment out the GZIP SUPPORT line
# below, and change COMP_DEFAULT to one of the compression types you have
# selected.
#
# Obviously, you must select at least one of the available gzip, xz, lzo,
# lz4, zstd or lzma (deprecated) compression types.
#
GZIP_SUPPORT = 1

########### Building XZ support #############
#
# LZMA2 compression.
#
# XZ Utils liblzma (http://tukaani.org/xz/) is supported
#
# Development packages (libraries and header files) should be
# supported by most modern distributions.  Please refer to
# your distribution package manager.
#
# To build install the library and uncomment
# the XZ_SUPPORT line below.
#
#XZ_SUPPORT = 1

# Enable support for OpenWrt extended compression options by uncommenting
# next line.  Do not do this unless you understand the implications.
#XZ_EXTENDED_OPTIONS = 1


############ Building LZO support ##############
#
# The LZO library (http://www.oberhumer.com/opensource/lzo/) is supported.
#
# Development packages (libraries and header files) should be
# supported by most modern distributions.  Please refer to
# your distribution package manager.
#
# To build install the library and uncomment
# the LZO_SUPPORT line below.
#
#LZO_SUPPORT = 1


########### Building LZ4 support #############
#
# Yann Collet's LZ4 tools are supported
# LZ4 homepage: https://lz4.github.io/lz4/
# LZ4 source repository: https://github.com/lz4/lz4/
#
# Development packages (libraries and header files) should be
# supported by most modern distributions.  Please refer to
# your distribution package manager.
#
# To build install and uncomment
# the LZ4_SUPPORT line below.
#
#LZ4_SUPPORT = 1


########### Building ZSTD support ############
#
# The ZSTD library is supported
# ZSTD homepage: https://facebook.github.io/zstd/
# ZSTD source repository: https://github.com/facebook/zstd
#
# Development packages (libraries and header files) should be
# supported by most modern distributions.  Please refer to
# your distribution package manager.
#
# To build install the library and uncomment
# the ZSTD_SUPPORT line below.
#
#ZSTD_SUPPORT = 1


######## Specifying default compression ########
#
# The next line specifies which compression algorithm is used by default
# in Mksquashfs.  Obviously the compression algorithm must have been
# selected to be built
#
COMP_DEFAULT = gzip


###############################################
#  Extended attribute (XATTRs) build options  #
###############################################
#
# Building XATTR support for Mksquashfs and Unsquashfs
#
# If your C library or build/target environment doesn't support XATTRs then
# comment out the next line to build Mksquashfs and Unsquashfs without XATTR
# support
XATTR_SUPPORT = 1

# Select whether you wish xattrs to be stored by Mksquashfs and extracted
# by Unsquashfs by default.  If selected users can disable xattr support by
# using the -no-xattrs option
#
# If unselected, Mksquashfs/Unsquashfs won't store and extract xattrs by
# default.  Users can enable xattrs by using the -xattrs option.
XATTR_DEFAULT = 1


###############################################
#          Reproducible Image options         #
###############################################
#
# Select whether you wish reproducible builds by default.  If selected users
# can disable reproducible builds using the not-reproducible option.
# If not selected, users can enable reproducible builds using the
# -reproducible option
REPRODUCIBLE_DEFAULT = 1

###############################################
#               Manpage generation            #
###############################################
#
# If help2man is available on the system, on installation, the Makefile
# will try to generate "custom" manpages from the built squashfs-tools.
#
# If the squashfs-tools have been cross-compiled, or for any other
# reason they're not executable, this will generate errors at
# installation and the install script will fall back to using
# pre-built manpages.
#
# Change next variable to "y" to use the pre-built manpages by default,
# and not attempt to generate "custom" manpages.  This will eliminate
# errors and warnings at install time.
USE_PREBUILT_MANPAGES=n

###############################################
#              INSTALL PATHS                  #
###############################################
#
# Alter INSTALL_* to install binaries and manpages
# elsewhere.
#
# To skip building and installing manpages,
# unset INSTALL_MANPAGES_DIR or set to ""
#
INSTALL_PREFIX = /usr/local
INSTALL_DIR = $(INSTALL_PREFIX)/bin
INSTALL_MANPAGES_DIR = $(INSTALL_PREFIX)/man/man1

###############################################
#              Obsolete options               #
###############################################

########### Building LZMA support #############
#
# LZMA1 compression.
#
# LZMA1 compression is obsolete, and the newer and better XZ (LZMA2)
# compression should be used in preference.
#
# Both XZ Utils liblzma (http://tukaani.org/xz/) and LZMA SDK
# (http://www.7-zip.org/sdk.html) are supported
#
# To build using XZ Utils liblzma - install the library and uncomment
# the LZMA_XZ_SUPPORT line below.
#
# To build using the LZMA SDK (4.65 used in development, other versions may
# work) - download and unpack it, uncomment and set LZMA_DIR to unpacked source,
# and uncomment the LZMA_SUPPORT line below.
#
#LZMA_XZ_SUPPORT = 1
#LZMA_SUPPORT = 1
#LZMA_DIR = ../../../../LZMA/lzma465
else
GZIP_SUPPORT ?= 1
ZX_SUPPORT ?= 0
LZO_SUPPORT ?= 0
LZ4_SUPPORT ?= 0
ZSTD_SUPPORT ?= 0
COMP_DEFAULT ?= gzip
XATTR_SUPPORT ?= 1
XATTR_DEFAULT ?= 1
REPRODUCIBLE_DEFAULT ?= 1
USE_PREBUILT_MANPAGES ?= 1
INSTALL_PREFIX ?= /usr/local
INSTALL_DIR ?= $(INSTALL_PREFIX)/bin
INSTALL_MANPAGES_DIR ?= $(INSTALL_PREFIX)/man/man1
LZMA_XZ_SUPPORT ?= 0
LZMA_SUPPORT ?= 0
LZMA_DIR ?= ../../../../LZMA/lzma465
XZ_EXTENDED_OPTIONS ?= 0
endif


###############################################
#        End of BUILD options section         #
###############################################
#
INCLUDEDIR = -I.

MKSQUASHFS_OBJS = mksquashfs.o read_fs.o action.o swap.o pseudo.o compressor.o \
	sort.o progressbar.o info.o restore.o process_fragments.o \
	caches-queues-lists.o reader.o tar.o date.o

UNSQUASHFS_OBJS = unsquashfs.o unsquash-1.o unsquash-2.o unsquash-3.o \
	unsquash-4.o unsquash-123.o unsquash-34.o unsquash-1234.o unsquash-12.o \
	swap.o compressor.o unsquashfs_info.o date.o

CFLAGS ?= -O2
CFLAGS += $(EXTRA_CFLAGS) $(INCLUDEDIR) -D_FILE_OFFSET_BITS=64 \
	-D_LARGEFILE_SOURCE -D_GNU_SOURCE -DCOMP_DEFAULT=\"$(COMP_DEFAULT)\" \
	-Wall

LIBS = -lpthread -lm
ifeq ($(GZIP_SUPPORT),1)
CFLAGS += -DGZIP_SUPPORT
MKSQUASHFS_OBJS += gzip_wrapper.o
UNSQUASHFS_OBJS += gzip_wrapper.o
LIBS += -lz
COMPRESSORS += gzip
endif

ifeq ($(LZMA_SUPPORT),1)
LZMA_OBJS = $(LZMA_DIR)/C/Alloc.o $(LZMA_DIR)/C/LzFind.o \
	$(LZMA_DIR)/C/LzmaDec.o $(LZMA_DIR)/C/LzmaEnc.o $(LZMA_DIR)/C/LzmaLib.o
INCLUDEDIR += -I$(LZMA_DIR)/C
CFLAGS += -DLZMA_SUPPORT
MKSQUASHFS_OBJS += lzma_wrapper.o $(LZMA_OBJS)
UNSQUASHFS_OBJS += lzma_wrapper.o $(LZMA_OBJS)
COMPRESSORS += lzma
endif

ifeq ($(LZMA_XZ_SUPPORT),1)
CFLAGS += -DLZMA_SUPPORT
MKSQUASHFS_OBJS += lzma_xz_wrapper.o
UNSQUASHFS_OBJS += lzma_xz_wrapper.o
LIBS += -llzma
COMPRESSORS += lzma
endif

ifeq ($(XZ_SUPPORT),1)
CFLAGS += -DXZ_SUPPORT
ifeq ($(XZ_EXTENDED_OPTIONS),1)
MKSQUASHFS_OBJS += xz_wrapper_extended.o
UNSQUASHFS_OBJS += xz_wrapper_extended.o
else
MKSQUASHFS_OBJS += xz_wrapper.o
UNSQUASHFS_OBJS += xz_wrapper.o
endif
LIBS += -llzma
COMPRESSORS += xz
endif

ifeq ($(LZO_SUPPORT),1)
CFLAGS += -DLZO_SUPPORT
MKSQUASHFS_OBJS += lzo_wrapper.o
UNSQUASHFS_OBJS += lzo_wrapper.o
LIBS += -llzo2
COMPRESSORS += lzo
endif

ifeq ($(LZ4_SUPPORT),1)
CFLAGS += -DLZ4_SUPPORT
MKSQUASHFS_OBJS += lz4_wrapper.o
UNSQUASHFS_OBJS += lz4_wrapper.o
LIBS += -llz4
COMPRESSORS += lz4
endif

ifeq ($(ZSTD_SUPPORT),1)
CFLAGS += -DZSTD_SUPPORT
MKSQUASHFS_OBJS += zstd_wrapper.o
UNSQUASHFS_OBJS += zstd_wrapper.o
LIBS += -lzstd
COMPRESSORS += zstd
endif

ifeq ($(XATTR_SUPPORT),1)
ifeq ($(XATTR_DEFAULT),1)
CFLAGS += -DXATTR_SUPPORT -DXATTR_DEFAULT
else
CFLAGS += -DXATTR_SUPPORT
endif
MKSQUASHFS_OBJS += xattr.o read_xattrs.o tar_xattr.o pseudo_xattr.o
UNSQUASHFS_OBJS += read_xattrs.o unsquashfs_xattr.o
endif

ifeq ($(REPRODUCIBLE_DEFAULT),1)
CFLAGS += -DREPRODUCIBLE_DEFAULT
endif

#
# If LZMA_SUPPORT is specified then LZMA_DIR must be specified too
#
ifeq ($(LZMA_SUPPORT),1)
ifndef LZMA_DIR
$(error "LZMA_SUPPORT requires LZMA_DIR to be also defined")
endif
endif

#
# Both LZMA_XZ_SUPPORT and LZMA_SUPPORT cannot be specified
#
ifeq ($(LZMA_XZ_SUPPORT),1)
ifeq ($(LZMA_SUPPORT),1)
$(error "Both LZMA_XZ_SUPPORT and LZMA_SUPPORT cannot be specified")
endif
endif

#
# At least one compressor must have been selected
#
ifndef COMPRESSORS
$(error "No compressor selected! Select one or more of GZIP, LZMA, XZ, LZO, \
	LZ4 or ZSTD!")
endif

#
# COMP_DEFAULT should be defined
#
ifndef COMP_DEFAULT
$(error "COMP_DEFAULT must be set to a compressor!")
endif

#
# COMP_DEFAULT must be a selected compressor
#
ifeq (, $(findstring $(COMP_DEFAULT), $(COMPRESSORS)))
$(error "COMP_DEFAULT is set to ${COMP_DEFAULT}, which isn't selected to be \
	built!")
endif

#
# Get VERSION and DATE for Mksquashfs/Unsquashfs version strings.
#
# If RELEASE_VERSION/RELEASE_DATE set, use them.
#
# If not set, this is a development version, therefore
#
# If this source has been exported by "git archive" use automatically
# expanded strings.
#
# Otherwise ask git for the details from current HEAD.
#
include version.mk

ifdef RELEASE_VERSION
VERSION := $(RELEASE_VERSION)
DATE := $(RELEASE_DATE)
else
ifeq ($(HASH),$Format:%h$)
VERSION := 4.6.1-$(shell git show -s --pretty=format:%h)
DATE := $(firstword $(subst -,/,$(shell git show -s --pretty=format:%ci)))
else
VERSION := 4.6-$(HASH)
DATE := $(firstword $(FULLDATE))
endif
endif

YEAR := $(firstword $(subst /, , $(DATE)))

CFLAGS += -DVERSION=\"$(VERSION)\" -DDATE=\"$(DATE)\" -DYEAR=\"$(YEAR)\"

.PHONY: all
all: mksquashfs unsquashfs

mksquashfs: $(MKSQUASHFS_OBJS)
	$(CC) $(LDFLAGS) $(EXTRA_LDFLAGS) $(MKSQUASHFS_OBJS) $(LIBS) -o $@
	ln -sf mksquashfs sqfstar

mksquashfs.o: Makefile mksquashfs.c squashfs_fs.h squashfs_swap.h mksquashfs.h \
	sort.h pseudo.h compressor.h xattr.h action.h mksquashfs_error.h progressbar.h \
	info.h caches-queues-lists.h read_fs.h restore.h process_fragments.h 

reader.o: squashfs_fs.h mksquashfs.h caches-queues-lists.h progressbar.h \
	mksquashfs_error.h pseudo.h sort.h

read_fs.o: read_fs.c squashfs_fs.h squashfs_swap.h compressor.h xattr.h \
	mksquashfs_error.h mksquashfs.h

sort.o: sort.c squashfs_fs.h mksquashfs.h sort.h mksquashfs_error.h progressbar.h

swap.o: swap.c

pseudo.o: pseudo.c pseudo.h mksquashfs_error.h progressbar.h

pseudo_xattr.o: pseudo_xattr.c xattr.h mksquashfs_error.h progressbar.h

compressor.o: Makefile compressor.c compressor.h squashfs_fs.h

xattr.o: xattr.c squashfs_fs.h squashfs_swap.h mksquashfs.h xattr.h mksquashfs_error.h \
	progressbar.h

read_xattrs.o: read_xattrs.c squashfs_fs.h squashfs_swap.h xattr.h error.h

action.o: action.c squashfs_fs.h mksquashfs.h action.h mksquashfs_error.h

progressbar.o: progressbar.c mksquashfs_error.h

info.o: info.c squashfs_fs.h mksquashfs.h mksquashfs_error.h progressbar.h \
	caches-queues-lists.h

restore.o: restore.c caches-queues-lists.h squashfs_fs.h mksquashfs.h mksquashfs_error.h \
	progressbar.h info.h

process_fragments.o: process_fragments.c process_fragments.h

caches-queues-lists.o: caches-queues-lists.c mksquashfs_error.h caches-queues-lists.h

tar.o: tar.h

tar_xattr.o: tar.h xattr.h

date.o: date.h error.h

gzip_wrapper.o: gzip_wrapper.c squashfs_fs.h gzip_wrapper.h compressor.h

lzma_wrapper.o: lzma_wrapper.c compressor.h squashfs_fs.h

lzma_xz_wrapper.o: lzma_xz_wrapper.c compressor.h squashfs_fs.h

lzo_wrapper.o: lzo_wrapper.c squashfs_fs.h lzo_wrapper.h compressor.h

lz4_wrapper.o: lz4_wrapper.c squashfs_fs.h lz4_wrapper.h compressor.h

xz_wrapper.o: xz_wrapper.c squashfs_fs.h xz_wrapper.h compressor.h

xz_wrapper_extended.o: xz_wrapper_extended.c squashfs_fs.h xz_wrapper.h compressor.h

unsquashfs: $(UNSQUASHFS_OBJS)
	$(CC) $(LDFLAGS) $(EXTRA_LDFLAGS) $(UNSQUASHFS_OBJS) $(LIBS) -o $@
	ln -sf unsquashfs sqfscat

unsquashfs.o: unsquashfs.h unsquashfs.c squashfs_fs.h squashfs_swap.h \
	squashfs_compat.h xattr.h read_fs.h compressor.h unsquashfs_error.h

unsquash-1.o: unsquashfs.h unsquash-1.c squashfs_fs.h squashfs_compat.h unsquashfs_error.h

unsquash-2.o: unsquashfs.h unsquash-2.c squashfs_fs.h squashfs_compat.h unsquashfs_error.h

unsquash-3.o: unsquashfs.h unsquash-3.c squashfs_fs.h squashfs_compat.h unsquashfs_error.h

unsquash-4.o: unsquashfs.h unsquash-4.c squashfs_fs.h squashfs_swap.h \
	read_fs.h unsquashfs_error.h

unsquash-123.o: unsquashfs.h unsquash-123.c squashfs_fs.h squashfs_compat.h unsquashfs_error.h

unsquash-34.o: unsquashfs.h unsquash-34.c unsquashfs_error.h

unsquash-1234.o: unsquash-1234.c unsquashfs_error.h

unsquash-12.o: unsquash-12.c unsquashfs.h

unsquashfs_xattr.o: unsquashfs_xattr.c unsquashfs.h squashfs_fs.h xattr.h unsquashfs_error.h

unsquashfs_info.o: unsquashfs.h squashfs_fs.h unsquashfs_error.h

.PHONY: clean
clean:
	-rm -f *.o mksquashfs unsquashfs sqfstar sqfscat *.1

.PHONY: install
install: mksquashfs unsquashfs
	mkdir -p $(INSTALL_DIR)
	cp mksquashfs $(INSTALL_DIR)
	cp unsquashfs $(INSTALL_DIR)
	ln -fs unsquashfs $(INSTALL_DIR)/sqfscat
	ln -fs mksquashfs $(INSTALL_DIR)/sqfstar
	../generate-manpages/install-manpages.sh $(shell pwd)/.. "$(INSTALL_MANPAGES_DIR)" "$(USE_PREBUILT_MANPAGES)"