# SPDX-License-Identifier: 0BSD ############################################################################# # # CMake support for building XZ Utils # # The complete CMake-based build hasn't been tested much yet and # thus it's still slightly experimental. Testing this especially # outside GNU/Linux and Windows would be great now. # # A few things are still missing compared to the Autotools-based build: # # - A few tests aren't CMake compatible yet and thus aren't run! # # - 32-bit x86 assembly code for CRC32 and CRC64 isn't used. # # - External SHA-256 code isn't supported but it's disabled by # default in the Autotools build too (--enable-external-sha256). # # - Extra compiler warning flags aren't added by default. # # 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. # # If building from xz.git instead of a release tarball, consider # the following *before* running cmake: # # - To get translated messages, install GNU gettext tools (the # command msgfmt is needed). Alternatively disable translations # by setting ENABLE_NLS=OFF. # # - To get translated man pages, run po4a/update-po which requires # the po4a tool. The build works without this step too. # # - To get Doxygen-generated liblzma API docs in HTML format, # run doxygen/update-doxygen which requires the doxygen tool. # The build works without this step too. # # 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 # ############################################################################# # NOTE: Translation support is disabled with CMake older than 3.20. cmake_minimum_required(VERSION 3.14...3.29 FATAL_ERROR) include(CMakePushCheckState) include(CheckIncludeFile) include(CheckSymbolExists) include(CheckStructHasMember) include(CheckCSourceCompiles) 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 "xz@tukaani.org") set(PACKAGE_URL "https://tukaani.org/xz/") # Get the package version from version.h into PACKAGE_VERSION variable. 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\ .*$" "\\1.\\2.\\3" PACKAGE_VERSION "${PACKAGE_VERSION}") # 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 "${PACKAGE_VERSION}" LANGUAGES C) if(OVERRIDE_O3_IN_C_FLAGS_RELEASE) # Looking at CMake's source, there aren't any _FLAGS_RELEASE_INIT # entries where "-O3" would appear as part of some other option, # thus a simple search and replace should be fine. string(REPLACE -O3 -O2 CMAKE_C_FLAGS_RELEASE "${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() # We need a compiler that supports enough C99 or newer (variable-length arrays # aren't needed, those are optional in C17). 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" # (the API headers are C89 and C++ compatible). set(CMAKE_C_STANDARD 99) set(CMAKE_C_STANDARD_REQUIRED ON) # On Apple OSes, don't build executables as bundles: set(CMAKE_MACOSX_BUNDLE 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 OR MSYS) 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 " " "\\x20" 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 "${CMAKE_INSTALL_FULL_LOCALEDIR}") endif() # Definitions common to all targets: add_compile_definitions( # Package info: PACKAGE_NAME="${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. $<$:NDEBUG> ) ###################### # 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(ALL) # 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 if needed. 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(INSERT CMAKE_REQUIRED_LIBRARIES 0 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") # For liblzma.pc else() list(REMOVE_AT CMAKE_REQUIRED_LIBRARIES 0) 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() # Translation support requires CMake 3.20 because it added the Intl::Intl # target so we don't need to play with the individual variables. # # 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.) if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.20") find_package(Intl) find_package(Gettext) if(Intl_FOUND) option(ENABLE_NLS "Native Language Support (translated messages)" ON) # If translation support is enabled but neither gettext tools or # pre-generated .gmo files exist, translation support cannot be # enabled. # # The detection of pre-generated .gmo files is done by only # checking for the existence of a single .gmo file; Ukrainian # is one of many translations that gets regular updates. if(ENABLE_NLS AND NOT GETTEXT_FOUND AND NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/po/uk.gmo") # This only sets the variable, not the cache variable! set(ENABLE_NLS OFF) # This message is shown only when new enough CMake is used and # library support for translations was found. The assumptions is # that in this situation the user might have interest in the # translations. This also keeps this code simpler. message(WARNING "Native language support (NLS) has been disabled. " "NLS support requires either gettext tools or " "pre-generated .gmo files. The latter are only " "available in distribution tarballs. " "To avoid this warning, NLS can be explicitly " "disabled by passing -DENABLE_NLS=OFF to cmake.") endif() # Warn if NLS is enabled but translated man pages are missing. if(UNIX AND ENABLE_NLS AND NOT EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/po4a/man") message(WARNING "Native language support (NLS) has been 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() endif() # Options for new enough GCC or Clang on any arch or operating system: if(CMAKE_C_COMPILER_ID MATCHES GNU|Clang) # configure.ac has a long list but it won't be copied here: add_compile_options(-Wall -Wextra) endif() ############################################################################# # liblzma ############################################################################# option(BUILD_SHARED_LIBS "Build liblzma as a shared library instead of static") if(NOT WIN32) # Symbol versioning only affects ELF shared libraries. The option is # ignored for static libraries. # # Determine the default value so that it's always set with # shared libraries in mind which helps if the build dir is reconfigured # from static to shared libs without resetting the cache variables. set(SYMBOL_VERSIONING_DEFAULT OFF) if(CMAKE_SYSTEM_NAME STREQUAL "Linux" 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_DEFAULT "generic") elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux") # 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. # # Avoid symvers on Linux with non-glibc like musl and uClibc. # In Autoconf it's enough to check that $host_os equals linux-gnu # instead of, for example, linux-musl. CMake doesn't provide such # a method. # # This check is here for now since it's not strictly required # by anything else. check_c_source_compiles( "#include #if defined(__GLIBC__) && !defined(__UCLIBC__) int main(void) { return 0; } #else compile error #endif " IS_LINUX_WITH_GLIBC) if(IS_LINUX_WITH_GLIBC) set(SYMBOL_VERSIONING_DEFAULT "linux") endif() elseif(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD") set(SYMBOL_VERSIONING_DEFAULT "generic") endif() set(SYMBOL_VERSIONING "${SYMBOL_VERSIONING_DEFAULT}" CACHE STRING "Enable ELF shared library symbol versioning (OFF, generic, linux)") # Show a dropdown menu in CMake GUI: set_property(CACHE SYMBOL_VERSIONING PROPERTY STRINGS "OFF;generic;linux") 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 ${LIBLZMA_API_HEADERS} src/liblzma/check/check.c src/liblzma/check/check.h src/liblzma/check/crc_common.h src/liblzma/check/crc_x86_clmul.h src/liblzma/check/crc32_arm64.h src/liblzma/common/block_util.c src/liblzma/common/common.c src/liblzma/common/common.h src/liblzma/common/easy_preset.c src/liblzma/common/easy_preset.h src/liblzma/common/filter_common.c src/liblzma/common/filter_common.h src/liblzma/common/hardware_physmem.c src/liblzma/common/index.c src/liblzma/common/index.h src/liblzma/common/memcmplen.h src/liblzma/common/stream_flags_common.c src/liblzma/common/stream_flags_common.h src/liblzma/common/string_conversion.c src/liblzma/common/vli_size.c ) target_include_directories(liblzma PRIVATE src/liblzma/api src/liblzma/common src/liblzma/check src/liblzma/lz src/liblzma/rangecoder src/liblzma/lzma src/liblzma/delta src/liblzma/simple src/common ) ###################### # Size optimizations # ###################### option(ENABLE_SMALL "Reduce code size at expense of speed. \ This may be useful together with CMAKE_BUILD_TYPE=MinSizeRel.") if(ENABLE_SMALL) add_compile_definitions(HAVE_SMALL) endif() ########## # Checks # ########## set(ADDITIONAL_SUPPORTED_CHECKS crc64 sha256) set(ADDITIONAL_CHECK_TYPES "${ADDITIONAL_SUPPORTED_CHECKS}" CACHE STRING "Additional check types to support (crc32 is always built)") foreach(CHECK IN LISTS ADDITIONAL_CHECK_TYPES) if(NOT CHECK IN_LIST ADDITIONAL_SUPPORTED_CHECKS) message(FATAL_ERROR "'${CHECK}' is not a supported check type") endif() endforeach() if(ENABLE_SMALL) target_sources(liblzma PRIVATE src/liblzma/check/crc32_small.c) else() target_sources(liblzma PRIVATE src/liblzma/check/crc32_fast.c src/liblzma/check/crc32_table.c src/liblzma/check/crc32_table_be.h src/liblzma/check/crc32_table_le.h ) endif() if("crc64" IN_LIST ADDITIONAL_CHECK_TYPES) add_compile_definitions("HAVE_CHECK_CRC64") if(ENABLE_SMALL) target_sources(liblzma PRIVATE src/liblzma/check/crc64_small.c) else() target_sources(liblzma PRIVATE src/liblzma/check/crc64_fast.c src/liblzma/check/crc64_table.c src/liblzma/check/crc64_table_be.h src/liblzma/check/crc64_table_le.h ) endif() endif() if("sha256" IN_LIST ADDITIONAL_CHECK_TYPES) add_compile_definitions("HAVE_CHECK_SHA256") target_sources(liblzma PRIVATE src/liblzma/check/sha256.c) endif() ################# # Match finders # ################# set(SUPPORTED_MATCH_FINDERS hc3 hc4 bt2 bt3 bt4) set(MATCH_FINDERS "${SUPPORTED_MATCH_FINDERS}" CACHE STRING "Match finders to support (at least one is required for LZMA1 or LZMA2)") foreach(MF IN LISTS 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 "'${MF}' is not a supported match finder") endif() endforeach() ############# # Threading # ############# # Supported threading methods: # ON - autodetect the best threading method. The autodetection will # prefer Windows threading (win95 or vista) over posix if both are # available. vista threads will be used over win95 unless it is a # 32-bit build. # OFF - Disable threading. # posix - Use posix threading (pthreads), or throw an error if not available. # win95 - Use Windows win95 threading, or throw an error if not available. # vista - Use Windows vista threading, or throw an error if not available. set(SUPPORTED_THREADING_METHODS ON OFF posix win95 vista) set(ENABLE_THREADS ON CACHE STRING "Threading method: Set to 'ON' to autodetect, 'OFF' to disable threading.") # Create dropdown in CMake GUI since only 1 threading method is possible # to select in a build. set_property(CACHE ENABLE_THREADS PROPERTY STRINGS "${SUPPORTED_THREADING_METHODS}") # This is a flag variable set when win95 threads are used. We must ensure # the combination of enable_small and win95 threads is not used without a # compiler supporting attribute __constructor__. set(USE_WIN95_THREADS OFF) # This is a flag variable set when posix threads (pthreads) are 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 ENABLE_THREADS IN_LIST SUPPORTED_THREADING_METHODS) message(FATAL_ERROR "'${ENABLE_THREADS}' is not a supported " "threading method") endif() if(ENABLE_THREADS) # Also set THREADS_PREFER_PTHREAD_FLAG since the flag has no effect # for Windows threading. set(THREADS_PREFER_PTHREAD_FLAG TRUE) find_package(Threads REQUIRED) # If both Windows and posix threading are available, prefer Windows. # Note that on Cygwin CMAKE_USE_WIN32_THREADS_INIT is false. if(CMAKE_USE_WIN32_THREADS_INIT AND NOT ENABLE_THREADS STREQUAL "posix") if(ENABLE_THREADS STREQUAL "win95" OR (ENABLE_THREADS STREQUAL "ON" AND CMAKE_SIZEOF_VOID_P EQUAL 4)) # Use Windows 95 (and thus XP) compatible threads. # This avoids use of features that were added in # Windows Vista. This is used for 32-bit x86 builds for # compatibility reasons since it makes no measurable difference # in performance compared to Vista threads. set(USE_WIN95_THREADS ON) add_compile_definitions(MYTHREAD_WIN95) else() add_compile_definitions(MYTHREAD_VISTA) endif() elseif(CMAKE_USE_PTHREADS_INIT) if(ENABLE_THREADS STREQUAL "posix" OR ENABLE_THREADS STREQUAL "ON") # The threading library only needs to be explicitly linked # for posix threads, so this is needed for creating # liblzma-config.cmake later. set(USE_POSIX_THREADS ON) target_link_libraries(liblzma Threads::Threads) add_compile_definitions(MYTHREAD_POSIX) # Check if pthread_condattr_setclock() exists to # use CLOCK_MONOTONIC. if(HAVE_CLOCK_MONOTONIC) list(INSERT CMAKE_REQUIRED_LIBRARIES 0 "${CMAKE_THREAD_LIBS_INIT}") 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() ############ # 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 "${SIMPLE_FILTERS}" ) set(ENCODERS "${SUPPORTED_FILTERS}" CACHE STRING "Encoders to support") # If LZMA2 is enabled, then LZMA1 must also be enabled. if(NOT "lzma1" IN_LIST ENCODERS AND "lzma2" IN_LIST 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(MATCH_FINDERS STREQUAL "" AND "lzma1" IN_LIST 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 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 src/liblzma/common/stream_buffer_encoder.c src/liblzma/common/stream_encoder.c src/liblzma/common/stream_flags_encoder.c src/liblzma/common/vli_encoder.c ) if(ENABLE_THREADS) target_sources(liblzma PRIVATE src/liblzma/common/stream_encoder_mt.c ) endif() if(SIMPLE_ENCODERS) target_sources(liblzma PRIVATE src/liblzma/simple/simple_encoder.c src/liblzma/simple/simple_encoder.h ) endif() if("lzma1" IN_LIST ENCODERS) target_sources(liblzma PRIVATE src/liblzma/lzma/lzma_encoder.c src/liblzma/lzma/lzma_encoder.h src/liblzma/lzma/lzma_encoder_optimum_fast.c src/liblzma/lzma/lzma_encoder_optimum_normal.c src/liblzma/lzma/lzma_encoder_private.h src/liblzma/lzma/fastpos.h src/liblzma/lz/lz_encoder.c src/liblzma/lz/lz_encoder.h src/liblzma/lz/lz_encoder_hash.h src/liblzma/lz/lz_encoder_hash_table.h src/liblzma/lz/lz_encoder_mf.c src/liblzma/rangecoder/price.h src/liblzma/rangecoder/price_table.c src/liblzma/rangecoder/range_encoder.h ) if(NOT ENABLE_SMALL) target_sources(liblzma PRIVATE src/liblzma/lzma/fastpos_table.c) endif() endif() if("lzma2" IN_LIST ENCODERS) target_sources(liblzma PRIVATE src/liblzma/lzma/lzma2_encoder.c src/liblzma/lzma/lzma2_encoder.h ) endif() if("delta" IN_LIST ENCODERS) set(HAVE_DELTA_CODER ON) target_sources(liblzma PRIVATE src/liblzma/delta/delta_encoder.c src/liblzma/delta/delta_encoder.h ) endif() endif() ############ # Decoders # ############ set(DECODERS "${SUPPORTED_FILTERS}" CACHE STRING "Decoders to support") set(SIMPLE_DECODERS OFF) set(HAVE_DECODERS OFF) foreach(DECODER IN LISTS DECODERS) if(DECODER IN_LIST SUPPORTED_FILTERS) set(HAVE_DECODERS ON) if(NOT SIMPLE_DECODERS AND DECODER IN_LIST SIMPLE_FILTERS) set(SIMPLE_DECODERS ON) endif() string(TOUPPER "${DECODER}" DECODER_UPPER) add_compile_definitions("HAVE_DECODER_${DECODER_UPPER}") else() message(FATAL_ERROR "'${DECODER}' is not a supported decoder") endif() endforeach() if(HAVE_DECODERS) add_compile_definitions(HAVE_DECODERS) target_sources(liblzma PRIVATE src/liblzma/common/alone_decoder.c src/liblzma/common/alone_decoder.h src/liblzma/common/auto_decoder.c src/liblzma/common/block_buffer_decoder.c src/liblzma/common/block_decoder.c src/liblzma/common/block_decoder.h src/liblzma/common/block_header_decoder.c src/liblzma/common/easy_decoder_memusage.c src/liblzma/common/file_info.c src/liblzma/common/filter_buffer_decoder.c src/liblzma/common/filter_decoder.c src/liblzma/common/filter_decoder.h src/liblzma/common/filter_flags_decoder.c src/liblzma/common/index_decoder.c src/liblzma/common/index_decoder.h src/liblzma/common/index_hash.c src/liblzma/common/stream_buffer_decoder.c src/liblzma/common/stream_decoder.c src/liblzma/common/stream_flags_decoder.c src/liblzma/common/stream_decoder.h src/liblzma/common/vli_decoder.c ) if(ENABLE_THREADS) target_sources(liblzma PRIVATE src/liblzma/common/stream_decoder_mt.c ) endif() if(SIMPLE_DECODERS) target_sources(liblzma PRIVATE src/liblzma/simple/simple_decoder.c src/liblzma/simple/simple_decoder.h ) endif() if("lzma1" IN_LIST DECODERS) target_sources(liblzma PRIVATE src/liblzma/lzma/lzma_decoder.c src/liblzma/lzma/lzma_decoder.h src/liblzma/rangecoder/range_decoder.h src/liblzma/lz/lz_decoder.c src/liblzma/lz/lz_decoder.h ) endif() if("lzma2" IN_LIST DECODERS) target_sources(liblzma PRIVATE src/liblzma/lzma/lzma2_decoder.c src/liblzma/lzma/lzma2_decoder.h ) endif() if("delta" IN_LIST DECODERS) set(HAVE_DELTA_CODER ON) target_sources(liblzma PRIVATE src/liblzma/delta/delta_decoder.c src/liblzma/delta/delta_decoder.h ) endif() endif() # Some sources must appear if the filter is configured as either # an encoder or decoder. if("lzma1" IN_LIST ENCODERS OR "lzma1" IN_LIST DECODERS) target_sources(liblzma PRIVATE src/liblzma/rangecoder/range_common.h src/liblzma/lzma/lzma_encoder_presets.c src/liblzma/lzma/lzma_common.h ) endif() if(HAVE_DELTA_CODER) target_sources(liblzma PRIVATE src/liblzma/delta/delta_common.c src/liblzma/delta/delta_common.h src/liblzma/delta/delta_private.h ) endif() if(SIMPLE_ENCODERS OR SIMPLE_DECODERS) target_sources(liblzma PRIVATE src/liblzma/simple/simple_coder.c src/liblzma/simple/simple_coder.h src/liblzma/simple/simple_private.h ) endif() foreach(SIMPLE_CODER IN LISTS SIMPLE_FILTERS) if(SIMPLE_CODER IN_LIST ENCODERS OR SIMPLE_CODER IN_LIST DECODERS) target_sources(liblzma PRIVATE "src/liblzma/simple/${SIMPLE_CODER}.c") endif() endforeach() ############# # MicroLZMA # ############# option(MICROLZMA_ENCODER "MicroLZMA encoder (needed by specific applications only)" ON) option(MICROLZMA_DECODER "MicroLZMA decoder (needed by specific applications only)" ON) if(MICROLZMA_ENCODER) if(NOT "lzma1" IN_LIST ENCODERS) message(FATAL_ERROR "The LZMA1 encoder is required to support the " "MicroLZMA encoder") endif() target_sources(liblzma PRIVATE src/liblzma/common/microlzma_encoder.c) endif() if(MICROLZMA_DECODER) if(NOT "lzma1" IN_LIST DECODERS) message(FATAL_ERROR "The LZMA1 decoder is required to support the " "MicroLZMA decoder") endif() target_sources(liblzma PRIVATE src/liblzma/common/microlzma_decoder.c) endif() ############################# # lzip (.lz) format support # ############################# option(LZIP_DECODER "Support lzip decoder" ON) if(LZIP_DECODER) # If lzip decoder support is requested, make sure LZMA1 decoder is enabled. if(NOT "lzma1" IN_LIST DECODERS) message(FATAL_ERROR "The LZMA1 decoder is required to support the " "lzip decoder") endif() add_compile_definitions(HAVE_LZIP_DECODER) target_sources(liblzma PRIVATE src/liblzma/common/lzip_decoder.c src/liblzma/common/lzip_decoder.h ) endif() ############## # Sandboxing # ############## # ON Use sandboxing if a supported method is available in the OS. # OFF Disable sandboxing. # capsicum Require Capsicum (FreeBSD >= 10.2) and fail if not found. # pledge Require pledge(2) (OpenBSD >= 5.9) and fail if not found. # landlock Require Landlock (Linux >= 5.13) and fail if not found. set(SUPPORTED_SANDBOX_METHODS ON OFF capsicum pledge landlock) set(ENABLE_SANDBOX ON CACHE STRING "Sandboxing method to use in 'xz', 'xzdec', and 'lzmadec'") set_property(CACHE ENABLE_SANDBOX PROPERTY STRINGS "${SUPPORTED_SANDBOX_METHODS}") if(NOT ENABLE_SANDBOX IN_LIST SUPPORTED_SANDBOX_METHODS) message(FATAL_ERROR "'${ENABLE_SANDBOX}' is not a supported " "sandboxing method") endif() # When autodetecting, the search order is fixed and we must not find # more than one method. if(ENABLE_SANDBOX STREQUAL "OFF") set(SANDBOX_FOUND ON) else() set(SANDBOX_FOUND OFF) endif() # Since xz and xzdec can both use sandboxing, the compile definition needed # to use the sandbox must be added to both targets. set(SANDBOX_COMPILE_DEFINITION OFF) # Sandboxing: Capsicum if(NOT SANDBOX_FOUND AND ENABLE_SANDBOX MATCHES "^ON$|^capsicum$") check_symbol_exists(cap_rights_limit sys/capsicum.h HAVE_CAP_RIGHTS_LIMIT) if(HAVE_CAP_RIGHTS_LIMIT) set(SANDBOX_COMPILE_DEFINITION "HAVE_CAP_RIGHTS_LIMIT") set(SANDBOX_FOUND ON) endif() endif() # Sandboxing: pledge(2) if(NOT SANDBOX_FOUND AND ENABLE_SANDBOX MATCHES "^ON$|^pledge$") check_symbol_exists(pledge unistd.h HAVE_PLEDGE) if(HAVE_PLEDGE) set(SANDBOX_COMPILE_DEFINITION "HAVE_PLEDGE") set(SANDBOX_FOUND ON) endif() endif() # Sandboxing: Landlock if(NOT SANDBOX_FOUND AND ENABLE_SANDBOX MATCHES "^ON$|^landlock$") # A compile check is done here because some systems have # linux/landlock.h, but do not have the syscalls defined # in order to actually use Linux Landlock. check_c_source_compiles(" #include #include #include void my_sandbox(void) { (void)prctl(PR_SET_NO_NEW_PRIVS, 1, 0, 0, 0); (void)SYS_landlock_create_ruleset; (void)SYS_landlock_restrict_self; (void)LANDLOCK_CREATE_RULESET_VERSION; return; } int main(void) { return 0; } " HAVE_LINUX_LANDLOCK) if(HAVE_LINUX_LANDLOCK) set(SANDBOX_COMPILE_DEFINITION "HAVE_LINUX_LANDLOCK") set(SANDBOX_FOUND ON) # Of our three sandbox methods, only Landlock is incompatible # with -fsanitize. FreeBSD 13.2 with Capsicum was tested with # -fsanitize=address,undefined and had no issues. OpenBSD (as # of version 7.4) has minimal support for process instrumentation. # OpenBSD does not distribute the additional libraries needed # (libasan, libubsan, etc.) with GCC or Clang needed for runtime # sanitization support and instead only support # -fsanitize-minimal-runtime for minimal undefined behavior # sanitization. This minimal support is compatible with our use # of the Pledge sandbox. So only Landlock will result in a # build that cannot compress or decompress a single file to # standard out. if(CMAKE_C_FLAGS MATCHES "-fsanitize=") message(SEND_ERROR "CMAKE_C_FLAGS or the environment variable CFLAGS " "contains '-fsanitize=' which is incompatible " "with Landlock sandboxing. Use -DENABLE_SANDBOX=OFF " "as an argument to 'cmake' when using '-fsanitize'.") endif() endif() endif() if(NOT SANDBOX_FOUND AND NOT ENABLE_SANDBOX MATCHES "^ON$|^OFF$") message(SEND_ERROR "ENABLE_SANDBOX=${ENABLE_SANDBOX} was used but " "support for the sandboxing method wasn't found.") endif() ### # Put the tuklib functions under the lzma_ namespace. target_compile_definitions(liblzma PRIVATE TUKLIB_SYMBOL_PREFIX=lzma_) tuklib_cpucores(liblzma) tuklib_physmem(liblzma) # While liblzma can be built without tuklib_cpucores or tuklib_physmem # modules, the liblzma API functions lzma_cputhreads() and lzma_physmem() # will then be useless (which isn't too bad but still unfortunate). Since # I expect the CMake-based builds to be only used on systems that are # supported by these tuklib modules, problems with these tuklib modules # are considered a hard error for now. This hopefully helps to catch bugs # in the CMake versions of the tuklib checks. if(NOT TUKLIB_CPUCORES_FOUND OR NOT TUKLIB_PHYSMEM_FOUND) # Use SEND_ERROR instead of FATAL_ERROR. If someone reports a bug, # seeing the results of the remaining checks can be useful too. message(SEND_ERROR "tuklib_cpucores() or tuklib_physmem() failed. " "Unless you really are building for a system where these " "modules are not supported (unlikely), this is a bug in the " "included cmake/tuklib_*.cmake files that should be fixed. " "To build anyway, edit this CMakeLists.txt to ignore this error.") endif() # Check for __attribute__((__constructor__)) support. # This needs -Werror because some compilers just warn # about this being unsupported. cmake_push_check_state() set(CMAKE_REQUIRED_FLAGS "-Werror") check_c_source_compiles(" __attribute__((__constructor__)) static void my_constructor_func(void) { return; } int main(void) { return 0; } " HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR) cmake_pop_check_state() tuklib_add_definition_if(liblzma HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR) # The Win95 threading lacks a thread-safe one-time initialization function. # The one-time initialization is needed for crc32_small.c and crc64_small.c # create the CRC tables. So if small mode is enabled, the threading mode is # win95, and the compiler does not support attribute constructor, then we # would end up with a multithreaded build that is thread-unsafe. As a # result this configuration is not allowed. if(USE_WIN95_THREADS AND ENABLE_SMALL AND NOT HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR) message(SEND_ERROR "Threading method win95 and ENABLE_SMALL " "cannot be used at the same time with a compiler " "that doesn't support " "__attribute__((__constructor__))") endif() # cpuid.h check_include_file(cpuid.h HAVE_CPUID_H) tuklib_add_definition_if(liblzma HAVE_CPUID_H) # immintrin.h: check_include_file(immintrin.h HAVE_IMMINTRIN_H) if(HAVE_IMMINTRIN_H) target_compile_definitions(liblzma PRIVATE HAVE_IMMINTRIN_H) # SSE2 intrinsics: check_c_source_compiles(" #include int main(void) { __m128i x = { 0 }; _mm_movemask_epi8(x); return 0; } " HAVE__MM_MOVEMASK_EPI8) tuklib_add_definition_if(liblzma HAVE__MM_MOVEMASK_EPI8) # CLMUL intrinsic: option(ALLOW_CLMUL_CRC "Allow carryless multiplication for CRC \ calculation if supported by the system" ON) if(ALLOW_CLMUL_CRC) check_c_source_compiles(" #include #if defined(__e2k__) && __iset__ < 6 # error #endif #if (defined(__GNUC__) || defined(__clang__)) \ && !defined(__EDG__) __attribute__((__target__(\"ssse3,sse4.1,pclmul\"))) #endif __m128i my_clmul(__m128i a) { const __m128i b = _mm_set_epi64x(1, 2); return _mm_clmulepi64_si128(a, b, 0); } int main(void) { return 0; } " HAVE_USABLE_CLMUL) tuklib_add_definition_if(liblzma HAVE_USABLE_CLMUL) endif() endif() # ARM64 C Language Extensions define CRC32 functions in arm_acle.h. # These are supported by at least GCC and Clang which both need # __attribute__((__target__("+crc"))), unless the needed compiler flags # are used to support the CRC instruction. option(ALLOW_ARM64_CRC32 "Allow ARM64 CRC32 instruction if supported by \ the system" ON) if(ALLOW_ARM64_CRC32) check_c_source_compiles(" #include #ifndef _MSC_VER #include #endif #if (defined(__GNUC__) || defined(__clang__)) && !defined(__EDG__) __attribute__((__target__(\"+crc\"))) #endif uint32_t my_crc(uint32_t a, uint64_t b) { return __crc32d(a, b); } int main(void) { return 0; } " HAVE_ARM64_CRC32) if(HAVE_ARM64_CRC32) target_compile_definitions(liblzma PRIVATE HAVE_ARM64_CRC32) # Check for ARM64 CRC32 instruction runtime detection. # getauxval() is supported on Linux. check_symbol_exists(getauxval sys/auxv.h HAVE_GETAUXVAL) tuklib_add_definition_if(liblzma HAVE_GETAUXVAL) # elf_aux_info() is supported on FreeBSD. check_symbol_exists(elf_aux_info sys/auxv.h HAVE_ELF_AUX_INFO) tuklib_add_definition_if(liblzma HAVE_ELF_AUX_INFO) # sysctlbyname("hw.optional.armv8_crc32", ...) is supported on Darwin # (macOS, iOS, etc.). Note that sysctlbyname() is supported on FreeBSD, # NetBSD, and possibly others too but the string is specific to # Apple OSes. The C code is responsible for checking # defined(__APPLE__) before using # sysctlbyname("hw.optional.armv8_crc32", ...). check_symbol_exists(sysctlbyname sys/sysctl.h HAVE_SYSCTLBYNAME) tuklib_add_definition_if(liblzma HAVE_SYSCTLBYNAME) endif() endif() # Symbol visibility support: # # The C_VISIBILITY_PRESET property takes care of adding the compiler # option -fvisibility=hidden (or equivalent) if and only if it is supported. # # HAVE_VISIBILITY should always be defined to 0 or 1. It tells liblzma # if __attribute__((__visibility__("default"))) # and __attribute__((__visibility__("hidden"))) are supported. # Those are useful only when the compiler supports -fvisibility=hidden # or such option so HAVE_VISIBILITY should be 1 only when both option and # the attribute support are present. HAVE_VISIBILITY is ignored on Windows # and Cygwin by the liblzma C code; __declspec(dllexport) is used instead. # # CMake's GenerateExportHeader module is too fancy since liblzma already # has the necessary macros. Instead, check CMake's internal variable # CMAKE_C_COMPILE_OPTIONS_VISIBILITY (it's the C-specific variant of # CMAKE__COMPILE_OPTIONS_VISIBILITY) which contains the compiler # command line option for visibility support. It's empty or unset when # visibility isn't supported. (It was added to CMake 2.8.12 in the commit # 0e9f4bc00c6b26f254e74063e4026ac33b786513 in 2013.) This way we don't # set HAVE_VISIBILITY to 1 when visibility isn't actually supported. if(BUILD_SHARED_LIBS AND CMAKE_C_COMPILE_OPTIONS_VISIBILITY) set_target_properties(liblzma PROPERTIES C_VISIBILITY_PRESET hidden) target_compile_definitions(liblzma PRIVATE HAVE_VISIBILITY=1) else() target_compile_definitions(liblzma PRIVATE HAVE_VISIBILITY=0) endif() if(WIN32) if(BUILD_SHARED_LIBS) # Add the Windows resource file for liblzma.dll. target_sources(liblzma PRIVATE src/liblzma/liblzma_w32res.rc) set_target_properties(liblzma PROPERTIES LINK_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/src/common/common_w32res.rc" ) # Export the public API symbols with __declspec(dllexport). target_compile_definitions(liblzma PRIVATE DLL_EXPORT) if(NOT MSVC) # Create a DEF file. The linker puts the ordinal numbers there # too so the output from the linker isn't our final file. target_link_options(liblzma PRIVATE "-Wl,--output-def,liblzma.def.in") # Remove the ordinal numbers from the DEF file so that # no one will create an import library that links by ordinal # instead of by name. We don't maintain a DEF file so the # ordinal numbers aren't stable. add_custom_command(TARGET liblzma POST_BUILD COMMAND "${CMAKE_COMMAND}" -DINPUT_FILE=liblzma.def.in -DOUTPUT_FILE=liblzma.def -P "${CMAKE_CURRENT_SOURCE_DIR}/cmake/remove-ordinals.cmake" BYPRODUCTS "liblzma.def" VERBATIM) endif() else() # Disable __declspec(dllimport) when linking against static liblzma. target_compile_definitions(liblzma INTERFACE LZMA_API_STATIC) endif() elseif(BUILD_SHARED_LIBS AND SYMBOL_VERSIONING STREQUAL "linux") # Note that adding link options doesn't affect static builds # but HAVE_SYMBOL_VERSIONS_LINUX must not be used with static builds # because it would put symbol versions into the static library which # can cause problems. It's clearer if all symver related things are # omitted when not building a shared library. # # NOTE: Set it explicitly to 1 to make it clear that versioning is # done unconditionally in the C files. target_compile_definitions(liblzma PRIVATE HAVE_SYMBOL_VERSIONS_LINUX=1) target_link_options(liblzma PRIVATE "-Wl,--version-script=${CMAKE_CURRENT_SOURCE_DIR}/src/liblzma/liblzma_linux.map" ) set_target_properties(liblzma PROPERTIES LINK_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/src/liblzma/liblzma_linux.map" ) elseif(BUILD_SHARED_LIBS AND SYMBOL_VERSIONING STREQUAL "generic") target_link_options(liblzma PRIVATE "-Wl,--version-script=${CMAKE_CURRENT_SOURCE_DIR}/src/liblzma/liblzma_generic.map" ) set_target_properties(liblzma PROPERTIES LINK_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/src/liblzma/liblzma_generic.map" ) endif() set_target_properties(liblzma PROPERTIES # At least for now the package versioning matches the rules used for # shared library versioning (excluding development releases) so it is # fine to use the package version here. SOVERSION "${xz_VERSION_MAJOR}" VERSION "${xz_VERSION}" # It's liblzma.so or liblzma.dll, not libliblzma.so or lzma.dll. # Avoid the name lzma.dll because it would conflict with LZMA SDK. PREFIX "" IMPORT_PREFIX "" ) # Create liblzma-config-version.cmake. # # FIXME: SameMajorVersion is correct for stable releases but it is wrong # for development releases where each release may have incompatible changes. include(CMakePackageConfigHelpers) write_basic_package_version_file( "${CMAKE_CURRENT_BINARY_DIR}/liblzma-config-version.cmake" VERSION "${liblzma_VERSION}" COMPATIBILITY SameMajorVersion) # Create liblzma-config.cmake. We use this spelling instead of # liblzmaConfig.cmake to make find_package work in case insensitive # manner even with case sensitive file systems. This gives more consistent # behavior between operating systems. This optionally includes a dependency # on a threading library, so the contents are created in two separate parts. # The "second half" is always needed, so create it first. set(LZMA_CONFIG_CONTENTS "include(\"\${CMAKE_CURRENT_LIST_DIR}/liblzma-targets.cmake\") if(NOT TARGET LibLZMA::LibLZMA) # Be compatible with the spelling used by the FindLibLZMA module. This # doesn't use ALIAS because it would make CMake resolve LibLZMA::LibLZMA # to liblzma::liblzma instead of keeping the original spelling. Keeping # the original spelling is important for good FindLibLZMA compatibility. add_library(LibLZMA::LibLZMA INTERFACE IMPORTED) set_target_properties(LibLZMA::LibLZMA PROPERTIES INTERFACE_LINK_LIBRARIES liblzma::liblzma) endif() ") if(USE_POSIX_THREADS) set(LZMA_CONFIG_CONTENTS "include(CMakeFindDependencyMacro) set(THREADS_PREFER_PTHREAD_FLAG TRUE) find_dependency(Threads) ${LZMA_CONFIG_CONTENTS} ") endif() file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/liblzma-config.cmake" "${LZMA_CONFIG_CONTENTS}") # Create liblzma.pc. set(prefix "${CMAKE_INSTALL_PREFIX}") set(exec_prefix "${CMAKE_INSTALL_PREFIX}") set(libdir "${CMAKE_INSTALL_FULL_LIBDIR}") set(includedir "${CMAKE_INSTALL_FULL_INCLUDEDIR}") set(PTHREAD_CFLAGS "${CMAKE_THREAD_LIBS_INIT}") configure_file(src/liblzma/liblzma.pc.in liblzma.pc @ONLY NEWLINE_STYLE LF) # Install the library binary. The INCLUDES specifies the include path that # is exported for other projects to use but it doesn't install any files. install(TARGETS liblzma EXPORT liblzmaTargets RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT liblzma_Runtime LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT liblzma_Runtime NAMELINK_COMPONENT liblzma_Development ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}" COMPONENT liblzma_Development INCLUDES DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}") # Install the liblzma API headers. These use a subdirectory so # this has to be done as a separate step. install(DIRECTORY src/liblzma/api/ COMPONENT liblzma_Development DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}" FILES_MATCHING PATTERN "*.h") # Install the CMake files that other packages can use to find liblzma. set(liblzma_INSTALL_CMAKEDIR "${CMAKE_INSTALL_LIBDIR}/cmake/liblzma" CACHE STRING "Path to liblzma's .cmake files") install(EXPORT liblzmaTargets NAMESPACE liblzma:: FILE liblzma-targets.cmake DESTINATION "${liblzma_INSTALL_CMAKEDIR}" COMPONENT liblzma_Development) install(FILES "${CMAKE_CURRENT_BINARY_DIR}/liblzma-config.cmake" "${CMAKE_CURRENT_BINARY_DIR}/liblzma-config-version.cmake" DESTINATION "${liblzma_INSTALL_CMAKEDIR}" COMPONENT liblzma_Development) if(NOT MSVC) install(FILES "${CMAKE_CURRENT_BINARY_DIR}/liblzma.pc" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig" COMPONENT liblzma_Development) endif() ############################################################################# # Helper functions for installing files ############################################################################# # For each non-empty element in the list LINK_NAMES, creates symbolic links # ${LINK_NAME}${LINK_SUFFIX} -> ${TARGET_NAME} in the directory ${DIR}. # The target file should exist because on Cygwin and MSYS2 symlink creation # can fail under certain conditions if the target doesn't exist. function(my_install_symlinks COMPONENT DIR TARGET_NAME LINK_SUFFIX LINK_NAMES) install(CODE "set(D \"\$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/${DIR}\") foreach(L ${LINK_NAMES}) file(CREATE_LINK \"${TARGET_NAME}\" \"\${D}/\${L}${LINK_SUFFIX}\" SYMBOLIC) endforeach()" COMPONENT "${COMPONENT}") endfunction() # Installs a man page file of a given language ("" for the untranslated file) # and optionally its alternative names as symlinks. This is a helper function # for my_install_man() below. function(my_install_man_lang COMPONENT SRC_FILE MAN_LANG LINK_NAMES) # Get the man page section from the filename suffix. string(REGEX REPLACE "^.*\.([^/.]+)$" "\\1" MAN_SECTION "${SRC_FILE}") # A few man pages might be missing from translations. # Don't attempt to install them or create the related symlinks. if(NOT MAN_LANG STREQUAL "" AND NOT EXISTS "${SRC_FILE}") return() endif() # Installing the file must be done before creating the symlinks # due to Cygwin and MSYS2. install(FILES "${SRC_FILE}" DESTINATION "${CMAKE_INSTALL_MANDIR}/${MAN_LANG}/man${MAN_SECTION}" COMPONENT "${COMPONENT}") # Get the basename of the file to be used as the symlink target. get_filename_component(BASENAME "${SRC_FILE}" NAME) # LINK_NAMES don't contain the man page filename suffix (like ".1") # so it needs to be told to my_install_symlinks. my_install_symlinks("${COMPONENT}" "${CMAKE_INSTALL_MANDIR}/${MAN_LANG}/man${MAN_SECTION}" "${BASENAME}" ".${MAN_SECTION}" "${LINK_NAMES}") endfunction() # Installs a man page file and optionally its alternative names as symlinks. # Does the same for translations if ENABLE_NLS. function(my_install_man COMPONENT SRC_FILE LINK_NAMES) my_install_man_lang("${COMPONENT}" "${SRC_FILE}" "" "${LINK_NAMES}") if(ENABLE_NLS) # Find the translated versions of this man page. get_filename_component(BASENAME "${SRC_FILE}" NAME) file(GLOB MAN_FILES "po4a/man/*/${BASENAME}") foreach(F ${MAN_FILES}) get_filename_component(MAN_LANG "${F}" DIRECTORY) get_filename_component(MAN_LANG "${MAN_LANG}" NAME) my_install_man_lang("${COMPONENT}" "${F}" "${MAN_LANG}" "${LINK_NAMES}") endforeach() endif() endfunction() ############################################################################# # libgnu (getopt_long) ############################################################################# # This mirrors how the Autotools build system handles the getopt_long # replacement, calling the object library libgnu since the replacement # version comes from Gnulib. add_library(libgnu OBJECT) # CMake requires that even an object library must have at least once source # file. So we give it a header file that results in no output files. # # NOTE: Using a file outside the lib directory makes it possible to # delete lib/*.h and lib/*.c and still keep the build working if # getopt_long replacement isn't needed. It's convenient if one wishes # to be certain that no GNU LGPL code gets included in the binaries. target_sources(libgnu PRIVATE src/common/sysdefs.h) # The Ninja Generator requires setting the linker language since it cannot # guess the programming language of just a header file. Setting this # property avoids needing an empty .c file or an non-empty unnecessary .c # file. set_target_properties(libgnu PROPERTIES LINKER_LANGUAGE C) # Create /lib directory in the build directory and add it to the include path. file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/lib") target_include_directories(libgnu PUBLIC "${CMAKE_CURRENT_BINARY_DIR}/lib") # Include /lib from the source directory. It does no harm even if none of # the Gnulib replacements are used. target_include_directories(libgnu PUBLIC lib) # The command line tools need getopt_long in order to parse arguments. If # the system does not have a getopt_long implementation we can use the one # from Gnulib instead. check_symbol_exists(getopt_long getopt.h HAVE_GETOPT_LONG) if(NOT HAVE_GETOPT_LONG) # Set the __GETOPT_PREFIX definition to "rpl_" (replacement) to avoid # name conflicts with libc symbols. The same prefix is set if using # the Autotools build (m4/getopt.m4). target_compile_definitions(libgnu PUBLIC "__GETOPT_PREFIX=rpl_") # Create a custom copy command to copy the getopt header to the build # directory and re-copy it if it is updated. (Gnulib does it this way # because it allows choosing which .in.h files to actually use in the # build. We need just getopt.h so this is a bit overcomplicated for # a single header file only.) add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/lib/getopt.h" COMMAND "${CMAKE_COMMAND}" -E copy "${CMAKE_CURRENT_SOURCE_DIR}/lib/getopt.in.h" "${CMAKE_CURRENT_BINARY_DIR}/lib/getopt.h" MAIN_DEPENDENCY "${CMAKE_CURRENT_SOURCE_DIR}/lib/getopt.in.h" VERBATIM) target_sources(libgnu PRIVATE lib/getopt1.c lib/getopt.c lib/getopt_int.h lib/getopt-cdefs.h lib/getopt-core.h lib/getopt-ext.h lib/getopt-pfx-core.h lib/getopt-pfx-ext.h "${CMAKE_CURRENT_BINARY_DIR}/lib/getopt.h" ) endif() ############################################################################# # xzdec and lzmadec ############################################################################# if(HAVE_DECODERS AND (NOT MSVC OR MSVC_VERSION GREATER_EQUAL 1900)) foreach(XZDEC xzdec lzmadec) add_executable("${XZDEC}" src/common/sysdefs.h src/common/tuklib_common.h src/common/tuklib_config.h src/common/tuklib_exit.c src/common/tuklib_exit.h src/common/tuklib_gettext.h src/common/tuklib_progname.c src/common/tuklib_progname.h src/xzdec/xzdec.c ) target_include_directories("${XZDEC}" PRIVATE src/common src/liblzma/api ) target_link_libraries("${XZDEC}" PRIVATE liblzma libgnu) if(WIN32) # Add the Windows resource file for xzdec.exe or lzmadec.exe. target_sources("${XZDEC}" PRIVATE src/xzdec/xzdec_w32res.rc) set_target_properties("${XZDEC}" PROPERTIES LINK_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/src/common/common_w32res.rc" ) endif() if(SANDBOX_COMPILE_DEFINITION) target_compile_definitions("${XZDEC}" PRIVATE "${SANDBOX_COMPILE_DEFINITION}") endif() tuklib_progname("${XZDEC}") install(TARGETS "${XZDEC}" RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT "${XZDEC}_Runtime") endforeach() # This is the only build-time difference with lzmadec. target_compile_definitions(lzmadec PRIVATE "LZMADEC") if(UNIX) # NOTE: This puts the lzmadec.1 symlinks into xzdec_Documentation. # This isn't great but doing them separately with translated # man pages would require extra code. So this has to suffice for now. my_install_man(xzdec_Documentation src/xzdec/xzdec.1 lzmadec) endif() endif() ############################################################################# # lzmainfo ############################################################################# if(HAVE_DECODERS AND (NOT MSVC OR MSVC_VERSION GREATER_EQUAL 1900)) add_executable(lzmainfo src/common/sysdefs.h src/common/tuklib_common.h src/common/tuklib_config.h src/common/tuklib_exit.c src/common/tuklib_exit.h src/common/tuklib_gettext.h src/common/tuklib_progname.c src/common/tuklib_progname.h src/lzmainfo/lzmainfo.c ) target_include_directories(lzmainfo PRIVATE src/common src/liblzma/api ) target_link_libraries(lzmainfo PRIVATE liblzma libgnu) if(WIN32) # Add the Windows resource file for lzmainfo.exe. target_sources(lzmainfo PRIVATE src/lzmainfo/lzmainfo_w32res.rc) set_target_properties(lzmainfo PROPERTIES LINK_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/src/common/common_w32res.rc" ) endif() tuklib_progname(lzmainfo) # NOTE: The translations are in the "xz" domain and the .mo files are # installed as part of the "xz" target. if(ENABLE_NLS) target_link_libraries(lzmainfo PRIVATE Intl::Intl) target_compile_definitions(lzmainfo PRIVATE ENABLE_NLS PACKAGE="${TRANSLATION_DOMAIN}" LOCALEDIR="${LOCALEDIR_DEFINITION}" ) endif() install(TARGETS lzmainfo RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT lzmainfo_Runtime) if(UNIX) my_install_man(lzmainfo_Documentation src/lzmainfo/lzmainfo.1 "") endif() endif() ############################################################################# # xz ############################################################################# if(NOT MSVC OR MSVC_VERSION GREATER_EQUAL 1900) add_executable(xz src/common/mythread.h src/common/sysdefs.h src/common/tuklib_common.h src/common/tuklib_config.h src/common/tuklib_exit.c src/common/tuklib_exit.h src/common/tuklib_gettext.h src/common/tuklib_integer.h src/common/tuklib_mbstr.h src/common/tuklib_mbstr_fw.c src/common/tuklib_mbstr_width.c src/common/tuklib_open_stdxxx.c src/common/tuklib_open_stdxxx.h src/common/tuklib_progname.c src/common/tuklib_progname.h src/xz/args.c src/xz/args.h src/xz/coder.c src/xz/coder.h src/xz/file_io.c src/xz/file_io.h src/xz/hardware.c src/xz/hardware.h src/xz/main.c src/xz/main.h src/xz/message.c src/xz/message.h src/xz/mytime.c src/xz/mytime.h src/xz/options.c src/xz/options.h src/xz/private.h src/xz/sandbox.c src/xz/sandbox.h src/xz/signals.c src/xz/signals.h src/xz/suffix.c src/xz/suffix.h src/xz/util.c src/xz/util.h ) target_include_directories(xz PRIVATE src/common src/liblzma/api ) if(HAVE_DECODERS) target_sources(xz PRIVATE src/xz/list.c src/xz/list.h ) endif() target_link_libraries(xz PRIVATE liblzma libgnu) target_compile_definitions(xz PRIVATE ASSUME_RAM=128) if(WIN32) # Add the Windows resource file for xz.exe. target_sources(xz PRIVATE src/xz/xz_w32res.rc) set_target_properties(xz PROPERTIES LINK_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/src/common/common_w32res.rc" ) endif() if(SANDBOX_COMPILE_DEFINITION) target_compile_definitions(xz PRIVATE "${SANDBOX_COMPILE_DEFINITION}") endif() tuklib_progname(xz) tuklib_mbstr(xz) check_symbol_exists(optreset getopt.h HAVE_OPTRESET) tuklib_add_definition_if(xz HAVE_OPTRESET) check_symbol_exists(posix_fadvise fcntl.h HAVE_POSIX_FADVISE) tuklib_add_definition_if(xz HAVE_POSIX_FADVISE) # How to get file time: check_struct_has_member("struct stat" st_atim.tv_nsec "sys/types.h;sys/stat.h" HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC) if(HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC) tuklib_add_definitions(xz HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC) else() check_struct_has_member("struct stat" st_atimespec.tv_nsec "sys/types.h;sys/stat.h" HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC) if(HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC) tuklib_add_definitions(xz HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC) else() check_struct_has_member("struct stat" st_atimensec "sys/types.h;sys/stat.h" HAVE_STRUCT_STAT_ST_ATIMENSEC) tuklib_add_definition_if(xz HAVE_STRUCT_STAT_ST_ATIMENSEC) endif() endif() # How to set file time: check_symbol_exists(futimens "sys/types.h;sys/stat.h" HAVE_FUTIMENS) if(HAVE_FUTIMENS) tuklib_add_definitions(xz HAVE_FUTIMENS) else() check_symbol_exists(futimes "sys/time.h" HAVE_FUTIMES) if(HAVE_FUTIMES) tuklib_add_definitions(xz HAVE_FUTIMES) else() check_symbol_exists(futimesat "sys/time.h" HAVE_FUTIMESAT) if(HAVE_FUTIMESAT) tuklib_add_definitions(xz HAVE_FUTIMESAT) else() check_symbol_exists(utimes "sys/time.h" HAVE_UTIMES) if(HAVE_UTIMES) tuklib_add_definitions(xz HAVE_UTIMES) else() check_symbol_exists(_futime "sys/utime.h" HAVE__FUTIME) if(HAVE__FUTIME) tuklib_add_definitions(xz HAVE__FUTIME) else() check_symbol_exists(utime "utime.h" HAVE_UTIME) tuklib_add_definition_if(xz HAVE_UTIME) endif() endif() endif() endif() endif() if(ENABLE_NLS) target_link_libraries(xz PRIVATE Intl::Intl) target_compile_definitions(xz PRIVATE ENABLE_NLS PACKAGE="${TRANSLATION_DOMAIN}" LOCALEDIR="${LOCALEDIR_DEFINITION}" ) file(STRINGS po/LINGUAS LINGUAS) # Where to find .gmo files. If msgfmt is available, the .po files # will be converted as part of the build. Otherwise we will use # the pre-generated .gmo files which are included in XZ Utils # tarballs by Autotools. set(GMO_DIR "${CMAKE_CURRENT_SOURCE_DIR}/po") if(GETTEXT_FOUND) # NOTE: gettext_process_po_files' INSTALL_DESTINATION is # incompatible with how Autotools requires the .po files to # be named. CMake would require each .po file to be named with # the translation domain and thus each .po file would need its # own language-specific directory (like "po/fi/xz.po"). On top # of this, INSTALL_DESTINATION doesn't allow specifying COMPONENT # and thus the .mo files go into "Unspecified" component. So we # can use gettext_process_po_files to convert the .po files but # installation needs to be done with our own code. # # Also, the .gmo files will go to root of the build directory # instead of neatly into a subdirectory. This is hardcoded in # CMake's FindGettext.cmake. foreach(LANG IN LISTS LINGUAS) gettext_process_po_files("${LANG}" ALL PO_FILES "${CMAKE_CURRENT_SOURCE_DIR}/po/${LANG}.po") endforeach() set(GMO_DIR "${CMAKE_CURRENT_BINARY_DIR}") endif() foreach(LANG IN LISTS LINGUAS) install( FILES "${GMO_DIR}/${LANG}.gmo" DESTINATION "${CMAKE_INSTALL_LOCALEDIR}/${LANG}/LC_MESSAGES" RENAME "${TRANSLATION_DOMAIN}.mo" COMPONENT xz_Runtime) endforeach() endif() # This command must be before the symlink creation to keep things working # on Cygwin and MSYS2 in all cases. # # - Cygwin can encode symlinks in multiple ways. This can be # controlled via the environment variable "CYGWIN". If it contains # "winsymlinks:nativestrict" then symlink creation will fail if # the link target doesn't exist. This mode isn't the default though. # See: https://cygwin.com/faq.html#faq.api.symlinks # # - MSYS2 supports the same winsymlinks option in the environment # variable "MSYS" (not "MSYS2). The default in MSYS2 is to make # a copy of the file instead of any kind of symlink. Thus the link # target must exist or the creation of the "symlink" (copy) will fail. # # Our installation order must be such that when a symbolic link is created # its target must already exists. There is no race condition for parallel # builds because the generated cmake_install.cmake executes serially. install(TARGETS xz RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT xz_Runtime) if(UNIX) option(CREATE_XZ_SYMLINKS "Create unxz and xzcat symlinks" ON) option(CREATE_LZMA_SYMLINKS "Create lzma, unlzma, and lzcat symlinks" ON) set(XZ_LINKS) if(CREATE_XZ_SYMLINKS) list(APPEND XZ_LINKS "unxz" "xzcat") endif() if(CREATE_LZMA_SYMLINKS) list(APPEND XZ_LINKS "lzma" "unlzma" "lzcat") endif() # On Cygwin, don't add the .exe suffix to the symlinks. # # FIXME? Does this make sense on MSYS & MSYS2 where "ln -s" # by default makes copies? Inside MSYS & MSYS2 it is possible # to execute files without the .exe suffix but not outside # (like in Command Prompt). Omitting the suffix matches # what configure.ac has done for many years though. my_install_symlinks(xz_Runtime "${CMAKE_INSTALL_BINDIR}" "xz${CMAKE_EXECUTABLE_SUFFIX}" "" "${XZ_LINKS}") # Install the man pages and (optionally) their symlinks # and translations. my_install_man(xz_Documentation src/xz/xz.1 "${XZ_LINKS}") endif() endif() ############################################################################# # Scripts ############################################################################# if(UNIX) # NOTE: This isn't as sophisticated as in the Autotools build which # uses posix-shell.m4 but hopefully this doesn't need to be either. # CMake likely won't be used on as many (old) obscure systems as the # Autotools-based builds are. if(CMAKE_SYSTEM_NAME STREQUAL "SunOS" AND EXISTS "/usr/xpg4/bin/sh") set(POSIX_SHELL_DEFAULT "/usr/xpg4/bin/sh") else() set(POSIX_SHELL_DEFAULT "/bin/sh") endif() set(POSIX_SHELL "${POSIX_SHELL_DEFAULT}" CACHE STRING "Shell to use for scripts (xzgrep and others)") # Guess the extra path to add from POSIX_SHELL. Autotools-based build # has a separate option --enable-path-for-scripts=PREFIX but this is # enough for Solaris. set(enable_path_for_scripts) get_filename_component(POSIX_SHELL_DIR "${POSIX_SHELL}" DIRECTORY) if(NOT POSIX_SHELL_DIR STREQUAL "/bin" AND NOT POSIX_SHELL_DIR STREQUAL "/usr/bin") set(enable_path_for_scripts "PATH=${POSIX_SHELL_DIR}:\$PATH") endif() set(XZDIFF_LINKS xzcmp) set(XZGREP_LINKS xzegrep xzfgrep) set(XZMORE_LINKS) set(XZLESS_LINKS) if(CREATE_LZMA_SYMLINKS) list(APPEND XZDIFF_LINKS lzdiff lzcmp) list(APPEND XZGREP_LINKS lzgrep lzegrep lzfgrep) list(APPEND XZMORE_LINKS lzmore) list(APPEND XZLESS_LINKS lzless) endif() set(xz "xz") foreach(S xzdiff xzgrep xzmore xzless) configure_file("src/scripts/${S}.in" "${S}" @ONLY NEWLINE_STYLE LF) install(PROGRAMS "${CMAKE_CURRENT_BINARY_DIR}/${S}" DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT scripts_Runtime) endforeach() # file(CHMOD ...) would need CMake 3.19 so use execute_process instead. # Using +x is fine even if umask was 077. If execute bit is set at all # then "make install" will set it for group and other access bits too. execute_process(COMMAND chmod +x xzdiff xzgrep xzmore xzless WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") unset(xz) unset(POSIX_SHELL) unset(enable_path_for_scripts) my_install_symlinks(scripts_Runtime "${CMAKE_INSTALL_BINDIR}" xzdiff "" "${XZDIFF_LINKS}") my_install_symlinks(scripts_Runtime "${CMAKE_INSTALL_BINDIR}" xzgrep "" "${XZGREP_LINKS}") my_install_symlinks(scripts_Runtime "${CMAKE_INSTALL_BINDIR}" xzmore "" "${XZMORE_LINKS}") my_install_symlinks(scripts_Runtime "${CMAKE_INSTALL_BINDIR}" xzless "" "${XZLESS_LINKS}") my_install_man(scripts_Documentation src/scripts/xzdiff.1 "${XZDIFF_LINKS}") my_install_man(scripts_Documentation src/scripts/xzgrep.1 "${XZGREP_LINKS}") my_install_man(scripts_Documentation src/scripts/xzmore.1 "${XZMORE_LINKS}") my_install_man(scripts_Documentation src/scripts/xzless.1 "${XZLESS_LINKS}") endif() ############################################################################# # Documentation ############################################################################# # Use OPTIONAL because doc/api might not exist. The liblzma API docs # can be generated by running "doxygen/update-doxygen". install(DIRECTORY doc/api doc/examples DESTINATION "${CMAKE_INSTALL_DOCDIR}" COMPONENT liblzma_Documentation OPTIONAL) # GPLv2 applies to the scripts. If GNU getopt_long is used then # LGPLv2.1 applies to the command line tools but, using the # section 3 of LGPLv2.1, GNU getopt_long can be handled as GPLv2 too. # Thus GPLv2 should be enough here. install(FILES AUTHORS COPYING COPYING.0BSD COPYING.GPLv2 NEWS README THANKS doc/faq.txt doc/history.txt doc/lzma-file-format.txt doc/xz-file-format.txt DESTINATION "${CMAKE_INSTALL_DOCDIR}" COMPONENT Documentation) ############################################################################# # Tests ############################################################################# # Tests are in a separate file so that it's possible to delete the whole # "tests" directory and still have a working build, just without the tests. include(tests/tests.cmake OPTIONAL)