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CMakeLists.txt
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# SPDX-License-Identifier: 0BSD
#############################################################################
#
# CMake support for building XZ Utils
#
# Requirements:
#
# - CMake 3.20 or later
#
# - To get translated messages, install GNU gettext tools (the command
# msgfmt is needed). Alternatively disable translations by setting
# XZ_NLS=OFF.
#
# - If building from xz.git instead of a release tarball: To generate
# translated man pages, run po4a/update-po which requires the po4a
# tool. The build works without this step too.
#
# About CMAKE_BUILD_TYPE:
#
# - CMake's standard choices are fine to use for production builds,
# including "Release" and "RelWithDebInfo".
#
# NOTE: While "Release" uses -O3 by default with some compilers,
# this file overrides -O3 to -O2 for "Release" builds if
# CMAKE_C_FLAGS_RELEASE is not defined by the user. At least
# with GCC and Clang/LLVM, -O3 doesn't seem useful for this
# package as it can result in bigger binaries without any
# improvement in speed compared to -O2.
#
# - Empty value (the default) is handled slightly specially: It
# adds -DNDEBUG to disable debugging code (assert() and a few
# other things). No optimization flags are added so an empty
# CMAKE_BUILD_TYPE is an easy way to build with whatever
# optimization flags one wants, and so this method is also
# suitable for production builds.
#
# If debugging is wanted when using empty CMAKE_BUILD_TYPE,
# include -UNDEBUG in the CFLAGS environment variable or
# in the CMAKE_C_FLAGS CMake variable to override -DNDEBUG.
# With empty CMAKE_BUILD_TYPE, the -UNDEBUG option will go
# after the -DNDEBUG option on the compiler command line and
# thus NDEBUG will be undefined.
#
# - Non-standard build types like "None" aren't treated specially
# and thus won't have -DNEBUG. Such non-standard build types
# SHOULD BE AVOIDED FOR PRODUCTION BUILDS. Or at least one
# should remember to add -DNDEBUG.
#
# This file provides the following installation components (if you only
# need liblzma, install only its components!):
# - liblzma_Runtime (shared library only)
# - liblzma_Development
# - liblzma_Documentation (examples and Doxygen-generated API docs as HTML)
# - xz_Runtime (xz, the symlinks, and possibly translation files)
# - xz_Documentation (xz man pages and the symlinks)
# - xzdec_Runtime
# - xzdec_Documentation (xzdec *and* lzmadec man pages)
# - lzmadec_Runtime
# - lzmainfo_Runtime
# - lzmainfo_Documentation (lzmainfo man pages)
# - scripts_Runtime (xzdiff, xzgrep, xzless, xzmore)
# - scripts_Documentation (their man pages)
# - Documentation (generic docs like README and licenses)
#
# To find the target liblzma::liblzma from other packages, use the CONFIG
# option with find_package() to avoid a conflict with the FindLibLZMA module
# with case-insensitive file systems. For example, to require liblzma 5.2.5
# or a newer compatible version:
#
# find_package(liblzma 5.2.5 REQUIRED CONFIG)
# target_link_libraries(my_application liblzma::liblzma)
#
#############################################################################
#
# Author: Lasse Collin
#
#############################################################################
cmake_minimum_required(VERSION 3.20...3.31 FATAL_ERROR)
include(CMakePushCheckState)
include(CheckIncludeFile)
include(CheckSymbolExists)
include(CheckStructHasMember)
include(CheckCSourceCompiles)
include(CheckCCompilerFlag)
include(cmake/tuklib_large_file_support.cmake)
include(cmake/tuklib_integer.cmake)
include(cmake/tuklib_cpucores.cmake)
include(cmake/tuklib_physmem.cmake)
include(cmake/tuklib_progname.cmake)
include(cmake/tuklib_mbstr.cmake)
set(PACKAGE_NAME "XZ Utils")
set(PACKAGE_BUGREPORT "[email protected]")
set(PACKAGE_URL "https://tukaani.org/xz/")
# Get the package version from version.h into PACKAGE_VERSION_SHORT and
# PACKAGE_VERSION. The former variable won't include the possible "alpha"
# or "beta" suffix.
file(READ src/liblzma/api/lzma/version.h PACKAGE_VERSION)
string(REGEX REPLACE
"^.*\n\
#define LZMA_VERSION_MAJOR ([0-9]+)\n\
.*\
#define LZMA_VERSION_MINOR ([0-9]+)\n\
.*\
#define LZMA_VERSION_PATCH ([0-9]+)\n\
.*$"
"\\1.\\2.\\3" PACKAGE_VERSION_SHORT "${PACKAGE_VERSION}")
if(PACKAGE_VERSION MATCHES "\n#define [A-Z_ ]*_ALPHA\n")
set(PACKAGE_VERSION "${PACKAGE_VERSION_SHORT}alpha")
elseif(PACKAGE_VERSION MATCHES "\n#define [A-Z_ ]*_BETA\n")
set(PACKAGE_VERSION "${PACKAGE_VERSION_SHORT}beta")
else()
set(PACKAGE_VERSION "${PACKAGE_VERSION_SHORT}")
endif()
# With several compilers, CMAKE_BUILD_TYPE=Release uses -O3 optimization
# which results in bigger code without a clear difference in speed. If
# no user-defined CMAKE_C_FLAGS_RELEASE is present, override -O3 to -O2
# to make it possible to recommend CMAKE_BUILD_TYPE=Release.
if(NOT DEFINED CMAKE_C_FLAGS_RELEASE)
set(OVERRIDE_O3_IN_C_FLAGS_RELEASE ON)
endif()
# Among other things, this gives us variables xz_VERSION and xz_VERSION_MAJOR.
project(xz VERSION "${PACKAGE_VERSION_SHORT}" LANGUAGES C)
if(OVERRIDE_O3_IN_C_FLAGS_RELEASE)
# Looking at CMake's source, there aren't any _FLAGS_RELEASE_INIT
# entries where "-O3" would appear as part of some other option,
# thus a simple search and replace should be fine.
string(REPLACE -O3 -O2 CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE}")
# Update the cache value while keeping its docstring unchanged.
set_property(CACHE CMAKE_C_FLAGS_RELEASE
PROPERTY VALUE "${CMAKE_C_FLAGS_RELEASE}")
endif()
# Reject unsupported MSVC versions.
if(MSVC AND MSVC_VERSION LESS 1900)
message(FATAL_ERROR "Visual Studio older than 2015 is not supported")
endif()
# We need a compiler that supports enough C99 or newer (variable-length arrays
# aren't needed, those are optional in C11/C17). C11 is preferred since C11
# features may be optionally used if they are available.
#
# Setting CMAKE_C_STANDARD here makes it the default for all targets.
# It doesn't affect the INTERFACE so liblzma::liblzma won't end up with
# INTERFACE_COMPILE_FEATURES "c_std_99" or such (the API headers are C89
# and C++ compatible).
#
# Avoid set(CMAKE_C_STANDARD_REQUIRED ON) because it's fine to decay
# to C99 if C11 isn't supported.
set(CMAKE_C_STANDARD 11)
# On Apple OSes, don't build executables as bundles:
set(CMAKE_MACOSX_BUNDLE OFF)
# The targets defined here don't support compiling as a unity build. Encoder
# and decoder source files define different types with the same name, and some
# internal header files don't have header guards leading to redeclaration
# errors.
set(CMAKE_UNITY_BUILD OFF)
# Set CMAKE_INSTALL_LIBDIR and friends. This needs to be done before
# the LOCALEDIR_DEFINITION workaround below.
include(GNUInstallDirs)
# windres from GNU binutils can be tricky with command line arguments
# that contain spaces or other funny characters. Unfortunately we need
# a space in PACKAGE_NAME. Using \x20 to encode the US-ASCII space seems
# to work in both cmd.exe and /bin/sh.
#
# However, even \x20 isn't enough in all situations, resulting in
# "syntax error" from windres. Using --use-temp-file prevents windres
# from using popen() and this seems to fix the problem.
#
# llvm-windres from Clang/LLVM 16.0.6 and older: The \x20 results
# in "XZx20Utils" in the compiled binary. The option --use-temp-file
# makes no difference.
#
# llvm-windres 17.0.0 and later: It emulates GNU windres more accurately, so
# the workarounds used with GNU windres must be used with llvm-windres too.
#
# CMake 3.27 doesn't have CMAKE_RC_COMPILER_ID so we rely on
# CMAKE_C_COMPILER_ID.
if((MINGW OR CYGWIN) AND (
NOT CMAKE_C_COMPILER_ID STREQUAL "Clang" OR
CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL "17"))
# Use workarounds with GNU windres and llvm-windres >= 17.0.0. The \x20
# in PACKAGE_NAME_DEFINITION works with gcc and clang too so we don't need
# to worry how to pass different flags to windres and the C compiler.
# Keep the original PACKAGE_NAME intact for generation of liblzma.pc.
string(APPEND CMAKE_RC_FLAGS " --use-temp-file")
string(REPLACE " " "\\040" PACKAGE_NAME_DEFINITION "${PACKAGE_NAME}")
# Use octal because "Program Files" would become \x20F.
string(REPLACE " " "\\040" LOCALEDIR_DEFINITION
"${CMAKE_INSTALL_FULL_LOCALEDIR}")
else()
# Elsewhere a space is safe. This also keeps things compatible with
# EBCDIC in case CMake-based build is ever done on such a system.
set(PACKAGE_NAME_DEFINITION "${PACKAGE_NAME}")
set(LOCALEDIR_DEFINITION "${CMAKE_INSTALL_FULL_LOCALEDIR}")
endif()
# When used with MSVC, CMake can merge .manifest files with
# linker-generated manifests and embed the result in an executable.
# However, when paired with MinGW-w64, CMake (3.30) ignores .manifest
# files. Embedding a manifest with a resource file works with both
# toochains. It's also the way to do it with Autotools.
#
# With MSVC, we need to disable the default manifest; attempting to add
# two manifest entries would break the build. The flag /MANIFEST:NO
# goes to the linker and it also affects behavior of CMake itself: it
# looks what flags are being passed to the linker and when CMake sees
# the /MANIFEST:NO option, other manifest-related linker flags are
# no longer added (see the file Source/cmcmd.cxx in CMake).
#
# See: https://gitlab.kitware.com/cmake/cmake/-/issues/23066
if(MSVC)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /MANIFEST:NO")
endif()
# Dependencies for all Windows resource files:
set(W32RES_DEPENDENCIES
"${CMAKE_CURRENT_SOURCE_DIR}/src/common/common_w32res.rc"
"${CMAKE_CURRENT_SOURCE_DIR}/src/common/w32_application.manifest"
)
# Definitions common to all targets:
add_compile_definitions(
# Package info:
PACKAGE_NAME="${PACKAGE_NAME_DEFINITION}"
PACKAGE_BUGREPORT="${PACKAGE_BUGREPORT}"
PACKAGE_URL="${PACKAGE_URL}"
# Standard headers and types are available:
HAVE_STDBOOL_H
HAVE__BOOL
HAVE_STDINT_H
HAVE_INTTYPES_H
# Always enable CRC32 since liblzma should never build without it.
HAVE_CHECK_CRC32
# Disable assert() checks when no build type has been specified. Non-empty
# build types like "Release" and "Debug" handle this by default.
$<$<CONFIG:>:NDEBUG>
)
# Support 32-bit x86 assembly files.
if(NOT MSVC)
# It's simplest to ask the compiler for the architecture because we
# know that on supported platforms __i386__ is defined.
#
# Checking CMAKE_SYSTEM_PROCESSOR wouldn't be so simple or as reliable
# because it could indicate x86-64 even if building for 32-bit x86
# because one doesn't necessarily use a CMake toolchain file when
# building 32-bit executables on a 64-bit system. Also, the strings
# that identify 32-bit or 64-bit x86 aren't standardized in CMake.
if(MINGW OR CYGWIN OR CMAKE_SYSTEM_NAME MATCHES
"^FreeBSD$|^GNU$|^Linux$|^MirBSD$|^NetBSD$|^OpenBSD$")
check_symbol_exists("__i386__" "" ASM_I386_DEFAULT)
else()
set(ASM_I386_DEFAULT OFF)
endif()
option(XZ_ASM_I386 "Enable 32-bit x86 assembly code"
"${ASM_I386_DEFAULT}")
if(XZ_ASM_I386)
enable_language(ASM)
endif()
endif()
######################
# System definitions #
######################
# _GNU_SOURCE and such definitions. This specific macro is special since
# it also adds the definitions to CMAKE_REQUIRED_DEFINITIONS.
tuklib_use_system_extensions()
# Check for large file support. It's required on some 32-bit platforms and
# even on 64-bit MinGW-w64 to get 64-bit off_t. This can be forced off on
# the CMake command line if needed: -DLARGE_FILE_SUPPORT=OFF
tuklib_large_file_support(ALL)
# This is needed by liblzma and xz.
tuklib_integer(ALL)
# This is used for liblzma.pc generation to add -lrt and -lmd if needed.
#
# The variable name LIBS comes from Autoconf where AC_SEARCH_LIBS adds the
# libraries it finds into the shell variable LIBS. These libraries need to
# be put into liblzma.pc too, thus liblzma.pc.in has @LIBS@ because that
# matches the Autoconf's variable. When CMake support was added, using
# the same variable with configure_file() was the simplest method.
set(LIBS)
# Check for clock_gettime(). Do this before checking for threading so
# that we know there if CLOCK_MONOTONIC is available.
check_symbol_exists(clock_gettime time.h HAVE_CLOCK_GETTIME)
if(NOT HAVE_CLOCK_GETTIME)
# With glibc <= 2.17 or Solaris 10 this needs librt.
# Add librt for the next check for HAVE_CLOCK_GETTIME. If it is
# found after including the library, we know that librt is required.
list(PREPEND CMAKE_REQUIRED_LIBRARIES rt)
check_symbol_exists(clock_gettime time.h HAVE_CLOCK_GETTIME_LIBRT)
# If it was found now, add librt to all targets and keep it in
# CMAKE_REQUIRED_LIBRARIES for further tests too.
if(HAVE_CLOCK_GETTIME_LIBRT)
link_libraries(rt)
set(LIBS "-lrt ${LIBS}") # For liblzma.pc
else()
list(POP_FRONT CMAKE_REQUIRED_LIBRARIES)
endif()
endif()
if(HAVE_CLOCK_GETTIME OR HAVE_CLOCK_GETTIME_LIBRT)
add_compile_definitions(HAVE_CLOCK_GETTIME)
# Check if CLOCK_MONOTONIC is available for clock_gettime().
check_symbol_exists(CLOCK_MONOTONIC time.h HAVE_CLOCK_MONOTONIC)
tuklib_add_definition_if(ALL HAVE_CLOCK_MONOTONIC)
endif()
# The definition ENABLE_NLS is added only to those targets that use it, thus
# it's not done here. (xz has translations, xzdec doesn't.)
set(XZ_NLS_DEFAULT OFF)
find_package(Intl)
find_package(Gettext)
if(Intl_FOUND AND GETTEXT_FOUND)
set(XZ_NLS_DEFAULT ON)
endif()
option(XZ_NLS "Native Language Support (translated messages and man pages)"
"${XZ_NLS_DEFAULT}")
if(XZ_NLS)
if(NOT Intl_FOUND)
message(FATAL_ERROR "Native language support (NLS) was enabled but "
"find_package(Intl) failed. "
"Install libintl or set XZ_NLS=OFF.")
endif()
if(NOT GETTEXT_FOUND)
message(FATAL_ERROR "Native language support (NLS) was enabled but "
"find_package(Gettext) failed. "
"Install gettext tools or set XZ_NLS=OFF.")
endif()
if(WIN32)
# The command line tools use UTF-8 on native Windows.
# Non-ASCII characters display correctly only when
# using UCRT and gettext-runtime >= 0.23.1.
check_c_source_compiles(
"#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <libintl.h>
#ifndef _UCRT
#error \"Not UCRT\"
#endif
#if LIBINTL_VERSION < 0x001701
#error \"gettext-runtime < 0.23.1\"
#endif
int main(void) { return 0; }
"
USING_UCRT_AND_RECENT_GETTEXT)
if(NOT USING_UCRT_AND_RECENT_GETTEXT)
message(FATAL_ERROR "Native language support (NLS) was enabled "
"but it requires UCRT and "
"gettext-runtime >= 0.23.1. To build with "
"MSVCRT or old gettext-runtime, "
"set XZ_NLS=OFF.")
endif()
endif()
# Warn if translated man pages are missing.
if(UNIX AND NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/po4a/man")
message(WARNING "Native language support (NLS) was enabled "
"but pre-generated translated man pages "
"were not found and thus they won't be installed. "
"Run 'po4a/update-po' to generate them.")
endif()
# The *installed* name of the translation files is "xz.mo".
set(TRANSLATION_DOMAIN "xz")
endif()
# Add warning options for GCC or Clang. Keep this in sync with configure.ac.
#
# NOTE: add_compile_options() doesn't affect the feature checks;
# only the new targets being created use these flags. Thus
# the -Werror usage in checks won't be break because of these.
if(CMAKE_C_COMPILER_ID MATCHES GNU|Clang)
foreach(OPT -Wall
-Wextra
-Wvla
-Wformat=2
-Winit-self
-Wmissing-include-dirs
-Wshift-overflow=2
-Wstrict-overflow=3
-Walloc-zero
-Wduplicated-cond
-Wfloat-equal
-Wundef
-Wshadow
-Wpointer-arith
-Wbad-function-cast
-Wwrite-strings
-Wdate-time
-Wsign-conversion
-Wfloat-conversion
-Wlogical-op
-Waggregate-return
-Wstrict-prototypes
-Wold-style-definition
-Wmissing-prototypes
-Wmissing-declarations
-Wredundant-decls
-Wimplicit-fallthrough
-Wimplicit-fallthrough=5
-Wc99-compat
-Wc11-extensions
-Wc2x-compat
-Wc2x-extensions
-Wpre-c2x-compat
-Warray-bounds-pointer-arithmetic
-Wassign-enum
-Wconditional-uninitialized
-Wdocumentation
-Wduplicate-enum
-Wempty-translation-unit
-Wflexible-array-extensions
-Wmissing-variable-declarations
-Wnewline-eof
-Wshift-sign-overflow
-Wstring-conversion
)
# A variable name cannot have = in it so replace = with _.
string(REPLACE = _ CACHE_VAR "HAVE_COMPILER_OPTION_${OPT}")
check_c_compiler_flag("${OPT}" "${CACHE_VAR}")
if("${${CACHE_VAR}}")
add_compile_options("${OPT}")
endif()
endforeach()
endif()
#############################################################################
# liblzma
#############################################################################
option(BUILD_SHARED_LIBS "Build liblzma as a shared library instead of static")
# Symbol versioning is supported with ELF shared libraries on certain OSes.
# First assume that symbol versioning isn't supported.
set(SYMBOL_VERSIONING "no")
if(NOT WIN32)
# The XZ_SYMBOL_VERSIONING option is ignored for static libraries but
# we keep the option visible still in case the project is reconfigured
# to build a shared library.
#
# auto Autodetect between no, generic, and linux
# yes Force on by autodetecting between linux and generic
# no Disable symbol versioning
# generic FreeBSD, most Linux/glibc systems, and GNU/Hurd
# linux Linux/glibc with extra symbol versions for compatibility
# with binaries that have been linked against a liblzma version
# that has been patched with "xz-5.2.2-compat-libs.patch" from
# RHEL/CentOS 7.
set(SUPPORTED_SYMBOL_VERSIONING_VARIANTS auto yes no generic linux)
set(XZ_SYMBOL_VERSIONING "auto" CACHE STRING "Enable ELF shared library \
symbol versioning (${SUPPORTED_SYMBOL_VERSIONING_VARIANTS})")
# Show a dropdown menu in CMake GUI:
set_property(CACHE XZ_SYMBOL_VERSIONING
PROPERTY STRINGS "${SUPPORTED_SYMBOL_VERSIONING_VARIANTS}")
if(NOT XZ_SYMBOL_VERSIONING IN_LIST SUPPORTED_SYMBOL_VERSIONING_VARIANTS)
message(FATAL_ERROR "'${XZ_SYMBOL_VERSIONING}' is not a supported "
"symbol versioning variant")
endif()
if(NOT XZ_SYMBOL_VERSIONING MATCHES "^auto$|^yes$")
# Autodetection was disabled. Use the user-specified value as is.
set(SYMBOL_VERSIONING "${XZ_SYMBOL_VERSIONING}")
else()
# Autodetect the symbol versioning variant.
#
# Avoid symvers on Linux with non-glibc like musl and uClibc.
# In Autoconf it's enough to check that $host_os equals linux-gnu
# instead of, for example, linux-musl. CMake doesn't provide such
# a method.
#
# This check is here for now since it's not strictly required
# by anything else.
if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
check_c_source_compiles(
"#include <features.h>
#if defined(__GLIBC__) && !defined(__UCLIBC__)
int main(void) { return 0; }
#else
compile error
#endif
"
IS_LINUX_WITH_GLIBC)
else()
set(IS_LINUX_WITH_GLIBC OFF)
endif()
if(IS_LINUX_WITH_GLIBC AND
(CMAKE_SYSTEM_PROCESSOR MATCHES "[Mm]icro[Bb]laze" OR
CMAKE_C_COMPILER_ID STREQUAL "NVHPC"))
# As a special case, GNU/Linux on MicroBlaze gets the generic
# symbol versioning because GCC 12 doesn't support the __symver__
# attribute on MicroBlaze. On Linux, CMAKE_SYSTEM_PROCESSOR comes
# from "uname -m" for native builds (should be "microblaze") or
# from the CMake toolchain file (not perfectly standardized but
# it very likely has "microblaze" in lower case or mixed case
# somewhere in the string).
#
# NVIDIA HPC Compiler doesn't support symbol versioning but
# it uses the linked from the system so the linker script
# can still be used to get the generic symbol versioning.
set(SYMBOL_VERSIONING "generic")
elseif(IS_LINUX_WITH_GLIBC)
# GNU/Linux-specific symbol versioning for shared liblzma. This
# includes a few extra compatibility symbols for RHEL/CentOS 7
# which are pointless on non-glibc non-Linux systems.
set(SYMBOL_VERSIONING "linux")
elseif(CMAKE_SYSTEM_NAME MATCHES "^FreeBSD$|^GNU$" OR
XZ_SYMBOL_VERSIONING STREQUAL "yes")
set(SYMBOL_VERSIONING "generic")
endif()
endif()
endif()
set(LIBLZMA_API_HEADERS
src/liblzma/api/lzma.h
src/liblzma/api/lzma/base.h
src/liblzma/api/lzma/bcj.h
src/liblzma/api/lzma/block.h
src/liblzma/api/lzma/check.h
src/liblzma/api/lzma/container.h
src/liblzma/api/lzma/delta.h
src/liblzma/api/lzma/filter.h
src/liblzma/api/lzma/hardware.h
src/liblzma/api/lzma/index.h
src/liblzma/api/lzma/index_hash.h
src/liblzma/api/lzma/lzma12.h
src/liblzma/api/lzma/stream_flags.h
src/liblzma/api/lzma/version.h
src/liblzma/api/lzma/vli.h
)
add_library(liblzma
src/common/mythread.h
src/common/sysdefs.h
src/common/tuklib_common.h
src/common/tuklib_config.h
src/common/tuklib_integer.h
src/common/tuklib_physmem.c
src/common/tuklib_physmem.h
${LIBLZMA_API_HEADERS}
src/liblzma/check/check.c
src/liblzma/check/check.h
src/liblzma/check/crc_common.h
src/liblzma/check/crc_x86_clmul.h
src/liblzma/check/crc32_arm64.h
src/liblzma/check/crc32_loongarch.h
src/liblzma/common/block_util.c
src/liblzma/common/common.c
src/liblzma/common/common.h
src/liblzma/common/easy_preset.c
src/liblzma/common/easy_preset.h
src/liblzma/common/filter_common.c
src/liblzma/common/filter_common.h
src/liblzma/common/hardware_physmem.c
src/liblzma/common/index.c
src/liblzma/common/index.h
src/liblzma/common/memcmplen.h
src/liblzma/common/stream_flags_common.c
src/liblzma/common/stream_flags_common.h
src/liblzma/common/string_conversion.c
src/liblzma/common/vli_size.c
)
target_include_directories(liblzma PRIVATE
src/liblzma/api
src/liblzma/common
src/liblzma/check
src/liblzma/lz
src/liblzma/rangecoder
src/liblzma/lzma
src/liblzma/delta
src/liblzma/simple
src/common
)
#############
# Threading #
#############
# Supported threading methods:
# yes - Autodetect the best threading method. The autodetection will
# prefer Windows threading (win95 or vista) over posix if both are
# available. vista threads will be used over win95 unless it is a
# 32-bit build. Configuration fails if no threading support is found;
# threading won't be silently disabled.
# no - Disable threading.
# posix - Use posix threading (pthreads), or throw an error if not available.
# win95 - Use Windows win95 threading, or throw an error if not available.
# vista - Use Windows vista threading, or throw an error if not available.
set(SUPPORTED_THREADING_METHODS yes no posix win95 vista)
set(XZ_THREADS yes CACHE STRING "Threading method: \
'yes' to autodetect, 'no' to disable, 'posix' (pthreads), \
'win95' (WinXP compatible), 'vista' (needs Windows Vista or later)")
# Create dropdown in CMake GUI since only 1 threading method is possible
# to select in a build.
set_property(CACHE XZ_THREADS
PROPERTY STRINGS "${SUPPORTED_THREADING_METHODS}")
# This is a flag variable set when win95 threads are used. We must ensure
# that the combination of XZ_SMALL and win95 threads is only used with a
# compiler that supports the __constructor__ attribute.
set(USE_WIN95_THREADS OFF)
# This is a flag variable set when posix threading (pthreads) is used.
# It's needed when creating liblzma-config.cmake where dependency on
# Threads::Threads is only needed with pthreads.
set(USE_POSIX_THREADS OFF)
if(NOT XZ_THREADS IN_LIST SUPPORTED_THREADING_METHODS)
message(FATAL_ERROR "'${XZ_THREADS}' is not a supported threading method")
endif()
if(XZ_THREADS)
# Also set THREADS_PREFER_PTHREAD_FLAG since the flag has no effect
# for Windows threading.
set(THREADS_PREFER_PTHREAD_FLAG TRUE)
find_package(Threads REQUIRED)
# If both Windows and posix threading are available, prefer Windows.
# Note that on Cygwin, CMAKE_USE_WIN32_THREADS_INIT is false.
if(CMAKE_USE_WIN32_THREADS_INIT AND NOT XZ_THREADS STREQUAL "posix")
if(XZ_THREADS STREQUAL "win95"
OR (XZ_THREADS STREQUAL "yes" AND CMAKE_SIZEOF_VOID_P EQUAL 4))
# Use Windows 95 (and thus XP) compatible threads.
# This avoids use of features that were added in
# Windows Vista. This is used for 32-bit x86 builds for
# compatibility reasons since it makes no measurable difference
# in performance compared to Vista threads.
set(USE_WIN95_THREADS ON)
add_compile_definitions(MYTHREAD_WIN95)
else()
add_compile_definitions(MYTHREAD_VISTA)
endif()
elseif(CMAKE_USE_PTHREADS_INIT)
if(XZ_THREADS MATCHES "^posix$|^yes$")
# The threading library only needs to be explicitly linked
# for posix threads, so this is needed for creating
# liblzma-config.cmake later.
set(USE_POSIX_THREADS ON)
target_link_libraries(liblzma PRIVATE Threads::Threads)
add_compile_definitions(MYTHREAD_POSIX)
# Make the thread libs available in later checks. In practice
# only pthread_condattr_setclock check should need this.
list(PREPEND CMAKE_REQUIRED_LIBRARIES "${CMAKE_THREAD_LIBS_INIT}")
# Check if pthread_condattr_setclock() exists to
# use CLOCK_MONOTONIC.
if(HAVE_CLOCK_MONOTONIC)
check_symbol_exists(pthread_condattr_setclock pthread.h
HAVE_PTHREAD_CONDATTR_SETCLOCK)
tuklib_add_definition_if(ALL HAVE_PTHREAD_CONDATTR_SETCLOCK)
endif()
else()
message(SEND_ERROR
"Windows threading method was requested but a compatible "
"library could not be found")
endif()
else()
message(SEND_ERROR "No supported threading library found")
endif()
target_sources(liblzma PRIVATE
src/common/tuklib_cpucores.c
src/common/tuklib_cpucores.h
src/liblzma/common/hardware_cputhreads.c
src/liblzma/common/outqueue.c
src/liblzma/common/outqueue.h
)
endif()
######################
# Size optimizations #
######################
option(XZ_SMALL "Reduce code size at expense of speed. \
This may be useful together with CMAKE_BUILD_TYPE=MinSizeRel.")
if(XZ_SMALL)
add_compile_definitions(HAVE_SMALL)
endif()
##########
# Checks #
##########
set(SUPPORTED_CHECKS crc32 crc64 sha256)
set(XZ_CHECKS "${SUPPORTED_CHECKS}" CACHE STRING
"Check types to support (crc32 is always built)")
foreach(CHECK IN LISTS XZ_CHECKS)
if(NOT CHECK IN_LIST SUPPORTED_CHECKS)
message(FATAL_ERROR "'${CHECK}' is not a supported check type")
endif()
endforeach()
if(XZ_SMALL)
target_sources(liblzma PRIVATE src/liblzma/check/crc32_small.c)
else()
target_sources(liblzma PRIVATE
src/liblzma/check/crc32_fast.c
src/liblzma/check/crc32_table_be.h
src/liblzma/check/crc32_table_le.h
)
if(XZ_ASM_I386)
target_sources(liblzma PRIVATE src/liblzma/check/crc32_x86.S)
target_compile_definitions(liblzma PRIVATE HAVE_CRC_X86_ASM)
endif()
endif()
if("crc64" IN_LIST XZ_CHECKS)
add_compile_definitions("HAVE_CHECK_CRC64")
if(XZ_SMALL)
target_sources(liblzma PRIVATE src/liblzma/check/crc64_small.c)
else()
target_sources(liblzma PRIVATE
src/liblzma/check/crc64_fast.c
src/liblzma/check/crc64_table_be.h
src/liblzma/check/crc64_table_le.h
)
if(XZ_ASM_I386)
target_sources(liblzma PRIVATE src/liblzma/check/crc64_x86.S)
# Adding #define HAVE_CRC_X86_ASM was already handled in
# the CRC32 case a few lines above. CRC32 is always built.
endif()
endif()
endif()
# External SHA-256
#
# At least the following implementations are supported:
#
# OS Headers Library Type Function
# FreeBSD sys/types.h + sha256.h libmd SHA256_CTX SHA256_Init
# NetBSD sys/types.h + sha2.h SHA256_CTX SHA256_Init
# OpenBSD sys/types.h + sha2.h SHA2_CTX SHA256Init
# Solaris sys/types.h + sha2.h libmd SHA256_CTX SHA256Init
# MINIX 3 sys/types.h + sha2.h SHA256_CTX SHA256_Init
# Darwin CommonCrypto/CommonDigest.h CC_SHA256_CTX CC_SHA256_Init
#
# Note that Darwin's CC_SHA256_Update takes buffer size as uint32_t instead
# of size_t.
#
# This is disabled by default because it used to conflict with OpenSSL
# on some platforms and in some cases the builtin code in liblzma was faster.
# See INSTALL and the commit message ac398c3bafa6e4c80e20571373a96947db863b3d.
option(XZ_EXTERNAL_SHA256 "Use SHA-256 code from the operating system \
if possible. See INSTALL for possible subtle problems." OFF)
if("sha256" IN_LIST XZ_CHECKS)
add_compile_definitions("HAVE_CHECK_SHA256")
# Assume that external code won't be used. We need this to know
# if the internal sha256.c should be built.
set(USE_INTERNAL_SHA256 ON)
if(XZ_EXTERNAL_SHA256)
# Find the header.
set(SHA256_HEADER OFF)
foreach(X CommonCrypto/CommonDigest.h sha256.h sha2.h)
string(TOUPPER "HAVE_${X}" HAVE_X)
string(REGEX REPLACE "[/.]" "_" HAVE_X "${HAVE_X}")
check_include_file("${X}" "${HAVE_X}")
if(${HAVE_X})
target_compile_definitions(liblzma PRIVATE "${HAVE_X}")
set(SHA256_HEADER "${X}")
break()
endif()
endforeach()
if(SHA256_HEADER)
# Find the type to hold the SHA-256 state.
set(SHA256_TYPE OFF)
foreach(X CC_SHA256_CTX SHA256_CTX SHA2_CTX)
string(TOUPPER "HAVE_${X}" HAVE_X)
# configure.ac uses <sys/types.h> conditionally but it's
# required on all cases except Darwin where it exists too.
# So just use it unconditionally here.
set(SOURCE
"#include <sys/types.h>
#include <${SHA256_HEADER}>
int main(void)
{
${X} ctx;
return 0;
}")
check_c_source_compiles("${SOURCE}" "${HAVE_X}")
if(${HAVE_X})
target_compile_definitions(liblzma PRIVATE "${HAVE_X}")
set(SHA256_TYPE "${X}")
break()
endif()
endforeach()
if(SHA256_TYPE)
# Find the initialization function. It might required libmd.
foreach(X CC_SHA256_Init SHA256Init SHA256_Init)
string(TOUPPER "HAVE_${X}" HAVE_X)
# On FreeBSD, <sha256.h> defines the SHA-256 functions as
# macros to rename them for namespace reasons. Avoid
# check_symbol_exists as that would accept macros without
# checking if the program links.
set(SOURCE
"#include <sys/types.h>
#include <${SHA256_HEADER}>
int main(void)
{
${SHA256_TYPE} ctx;
${X}(&ctx);
return 0;
}")
check_c_source_compiles("${SOURCE}" "${HAVE_X}")
if(${HAVE_X})
target_compile_definitions(liblzma PRIVATE "${HAVE_X}")
set(USE_INTERNAL_SHA256 OFF)
break()
else()
# Try with libmd. Other checks don't need it so we
# don't need to leave it into CMAKE_REQUIRED_LIBRARIES.
list(PREPEND CMAKE_REQUIRED_LIBRARIES md)
check_c_source_compiles("${SOURCE}" "${HAVE_X}_LIBMD")
list(POP_FRONT CMAKE_REQUIRED_LIBRARIES)
if(${HAVE_X}_LIBMD)
# NOTE: Just "${HAVE_X}", not "${HAVE_X}_LIBMD":
target_compile_definitions(liblzma PRIVATE
"${HAVE_X}")
target_link_libraries(liblzma PRIVATE md)
set(LIBS "-lmd ${LIBS}") # For liblzma.pc
set(USE_INTERNAL_SHA256 OFF)
break()
endif()
endif()
endforeach()
endif()
endif()
endif()
if(USE_INTERNAL_SHA256)
target_sources(liblzma PRIVATE src/liblzma/check/sha256.c)
endif()
endif()
#################
# Match finders #
#################
set(SUPPORTED_MATCH_FINDERS hc3 hc4 bt2 bt3 bt4)
set(XZ_MATCH_FINDERS "${SUPPORTED_MATCH_FINDERS}" CACHE STRING
"Match finders to support (at least one is required for LZMA1 or LZMA2)")
foreach(MF IN LISTS XZ_MATCH_FINDERS)
if(MF IN_LIST SUPPORTED_MATCH_FINDERS)
string(TOUPPER "${MF}" MF_UPPER)
add_compile_definitions("HAVE_MF_${MF_UPPER}")
else()
message(FATAL_ERROR "'${MF}' is not a supported match finder")
endif()
endforeach()
############
# Encoders #
############
set(SIMPLE_FILTERS
x86
arm
armthumb
arm64
powerpc
ia64
sparc
riscv
)
# The SUPPORTED_FILTERS are shared between Encoders and Decoders
# since only lzip does not appear in both lists. lzip is a special
# case anyway, so it is handled separately in the Decoders section.
set(SUPPORTED_FILTERS
lzma1
lzma2
delta
"${SIMPLE_FILTERS}"
)
set(XZ_ENCODERS "${SUPPORTED_FILTERS}" CACHE STRING "Encoders to support")
# If LZMA2 is enabled, then LZMA1 must also be enabled.
if(NOT "lzma1" IN_LIST XZ_ENCODERS AND "lzma2" IN_LIST XZ_ENCODERS)
message(FATAL_ERROR "LZMA2 encoder requires that LZMA1 is also enabled")
endif()
# If LZMA1 is enabled, then at least one match finder must be enabled.
if(XZ_MATCH_FINDERS STREQUAL "" AND "lzma1" IN_LIST XZ_ENCODERS)
message(FATAL_ERROR "At least 1 match finder is required for an "
"LZ-based encoder")
endif()
set(HAVE_DELTA_CODER OFF)
set(SIMPLE_ENCODERS OFF)
set(HAVE_ENCODERS OFF)
foreach(ENCODER IN LISTS XZ_ENCODERS)
if(ENCODER IN_LIST SUPPORTED_FILTERS)
set(HAVE_ENCODERS ON)
if(NOT SIMPLE_ENCODERS AND ENCODER IN_LIST SIMPLE_FILTERS)
set(SIMPLE_ENCODERS ON)
endif()
string(TOUPPER "${ENCODER}" ENCODER_UPPER)
add_compile_definitions("HAVE_ENCODER_${ENCODER_UPPER}")
else()
message(FATAL_ERROR "'${ENCODER}' is not a supported encoder")
endif()
endforeach()
if(HAVE_ENCODERS)
add_compile_definitions(HAVE_ENCODERS)
target_sources(liblzma PRIVATE
src/liblzma/common/alone_encoder.c
src/liblzma/common/block_buffer_encoder.c
src/liblzma/common/block_buffer_encoder.h
src/liblzma/common/block_encoder.c
src/liblzma/common/block_encoder.h
src/liblzma/common/block_header_encoder.c
src/liblzma/common/easy_buffer_encoder.c
src/liblzma/common/easy_encoder.c
src/liblzma/common/easy_encoder_memusage.c
src/liblzma/common/filter_buffer_encoder.c
src/liblzma/common/filter_encoder.c
src/liblzma/common/filter_encoder.h
src/liblzma/common/filter_flags_encoder.c
src/liblzma/common/index_encoder.c
src/liblzma/common/index_encoder.h