Build: Add very limited experimental CMake support.

This does *NOT* replace the Autotools-based build system in
the foreseeable future. See the comment in the beginning
of CMakeLists.txt.

So far this has been tested only on GNU/Linux but I commit
it anyway to make it easier for others to test. Since I
haven't played much with CMake before, it's likely that
there are things that have been done in a silly or wrong
way and need to be fixed.

7 files changed, 1151 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 00000000..5b840b46
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,643 @@
+#############################################################################
+#
+# Very limited CMake support for building some parts of XZ Utils
+#
+# For now, this is indented to be useful to build static or shared liblzma
+# on Windows with MSVC (to avoid the need to maintain Visual Studio project
+# files). Building liblzma on a few other platforms should work too but it
+# is somewhat experimental and not as portable as using ./configure.
+#
+# On some platforms this builds also xz and xzdec, but these are
+# highly experimental and meant for testing only:
+#   - No large file support on those 32-bit platforms that need it
+#   - No replacement getopt_long(), libc must have it
+#   - No sandboxing support
+#   - No translations
+#   - No xz symlinks are installed
+#
+# Other missing things:
+#   - No xzgrep or other scripts or their symlinks
+#   - No tests (no test failures either!)
+#
+# NOTE: Even if the code compiles without warnings, the end result may be
+# different than via ./configure. Specifically, the list of #defines
+# may be different (if so, probably this CMakeLists.txt got them wrong).
+#
+# This file provides the following installation components (if you only
+# need liblzma, install only its components!):
+#   - liblzma_Runtime
+#   - liblzma_Development
+#   - xz (on some platforms only)
+#   - xzdec (on some platforms only)
+#
+# 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
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+#############################################################################
+
+cmake_minimum_required(VERSION 3.13...3.16 FATAL_ERROR)
+
+include(CheckSymbolExists)
+include(CheckStructHasMember)
+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)
+
+# Get the package version from version.h into XZ_VERSION variable.
+file(READ src/liblzma/api/lzma/version.h XZ_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" XZ_VERSION ${XZ_VERSION})
+
+# Among other things, this gives us variables xz_VERSION and xz_VERSION_MAJOR.
+project(xz VERSION ${XZ_VERSION} LANGUAGES C)
+
+# Definitions common to all targets:
+add_compile_definitions(
+    # Package info:
+    PACKAGE_NAME="XZ Utils"
+    PACKAGE_BUGREPORT="lasse.collin@tukaani.org"
+    PACKAGE_URL="https://tukaani.org/xz/"
+
+    # Features:
+    HAVE_CHECK_CRC32
+    HAVE_CHECK_CRC64
+    HAVE_CHECK_SHA256
+    HAVE_DECODERS
+    HAVE_DECODER_ARM
+    HAVE_DECODER_ARMTHUMB
+    HAVE_DECODER_DELTA
+    HAVE_DECODER_IA64
+    HAVE_DECODER_LZMA1
+    HAVE_DECODER_LZMA2
+    HAVE_DECODER_POWERPC
+    HAVE_DECODER_SPARC
+    HAVE_DECODER_X86
+    HAVE_ENCODERS
+    HAVE_ENCODER_ARM
+    HAVE_ENCODER_ARMTHUMB
+    HAVE_ENCODER_DELTA
+    HAVE_ENCODER_IA64
+    HAVE_ENCODER_LZMA1
+    HAVE_ENCODER_LZMA2
+    HAVE_ENCODER_POWERPC
+    HAVE_ENCODER_SPARC
+    HAVE_ENCODER_X86
+    HAVE_MF_BT2
+    HAVE_MF_BT3
+    HAVE_MF_BT4
+    HAVE_MF_HC3
+    HAVE_MF_HC4
+
+    # Standard headers and types are available:
+    HAVE_STDBOOL_H
+    HAVE__BOOL
+    HAVE_STDINT_H
+    HAVE_INTTYPES_H
+
+    # Disable assert() checks when no build type has been specified. Non-empty
+    # build types like "Release" and "Debug" handle this by default.
+    $<$<CONFIG:>:NDEBUG>
+)
+
+# _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)
+
+# This is needed by liblzma and xz.
+tuklib_integer(ALL)
+
+# Check for clock_gettime(). Do this before checking for threading so
+# that we know there if CLOCK_MONOTONIC is available.
+if(NOT WIN32 AND NOT DEFINED CACHE{HAVE_CLOCK_GETTIME})
+    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.
+        unset(HAVE_CLOCK_GETTIME CACHE)
+
+        list(INSERT CMAKE_REQUIRED_LIBRARIES 0 rt)
+        check_symbol_exists(clock_gettime time.h HAVE_CLOCK_GETTIME)
+
+        # If it was found now, add it to all targets and keep it
+        # in CMAKE_REQUIRED_LIBRARIES for further tests too.
+        if(HAVE_CLOCK_GETTIME)
+            link_libraries(rt)
+        else()
+            list(REMOVE_AT CMAKE_REQUIRED_LIBRARIES 0)
+        endif()
+    endif()
+    if(HAVE_CLOCK_GETTIME)
+        # Check if CLOCK_MONOTONIC is available for clock_gettime().
+        check_symbol_exists(CLOCK_MONOTONIC time.h HAVE_DECL_CLOCK_MONOTONIC)
+
+        # HAVE_DECL_CLOCK_MONOTONIC should always be defined to 0 or 1
+        # when clock_gettime is available.
+        add_compile_definitions(
+            HAVE_CLOCK_GETTIME
+            HAVE_DECL_CLOCK_MONOTONIC=$<BOOL:${HAVE_DECL_CLOCK_MONOTONIC}>
+        )
+    endif()
+endif()
+
+# Threading support:
+set(THREADS_PREFER_PTHREAD_FLAG TRUE)
+find_package(Threads REQUIRED)
+if(CMAKE_USE_WIN32_THREADS_INIT)
+    add_compile_definitions(MYTHREAD_VISTA)
+else()
+    add_compile_definitions(MYTHREAD_POSIX)
+
+    # Check if pthread_condattr_setclock() exists to use CLOCK_MONOTONIC.
+    if(HAVE_DECL_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()
+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")
+
+add_library(liblzma
+    src/common/mythread.h
+    src/common/sysdefs.h
+    src/common/tuklib_common.h
+    src/common/tuklib_config.h
+    src/common/tuklib_cpucores.c
+    src/common/tuklib_cpucores.h
+    src/common/tuklib_integer.h
+    src/common/tuklib_physmem.c
+    src/common/tuklib_physmem.h
+    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
+    src/liblzma/check/check.c
+    src/liblzma/check/check.h
+    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
+    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
+    src/liblzma/check/crc_macros.h
+    src/liblzma/check/sha256.c
+    src/liblzma/common/alone_decoder.c
+    src/liblzma/common/alone_decoder.h
+    src/liblzma/common/alone_encoder.c
+    src/liblzma/common/auto_decoder.c
+    src/liblzma/common/block_buffer_decoder.c
+    src/liblzma/common/block_buffer_encoder.c
+    src/liblzma/common/block_buffer_encoder.h
+    src/liblzma/common/block_decoder.c
+    src/liblzma/common/block_decoder.h
+    src/liblzma/common/block_encoder.c
+    src/liblzma/common/block_encoder.h
+    src/liblzma/common/block_header_decoder.c
+    src/liblzma/common/block_header_encoder.c
+    src/liblzma/common/block_util.c
+    src/liblzma/common/common.c
+    src/liblzma/common/common.h
+    src/liblzma/common/easy_buffer_encoder.c
+    src/liblzma/common/easy_decoder_memusage.c
+    src/liblzma/common/easy_encoder.c
+    src/liblzma/common/easy_encoder_memusage.c
+    src/liblzma/common/easy_preset.c
+    src/liblzma/common/easy_preset.h
+    src/liblzma/common/file_info.c
+    src/liblzma/common/filter_buffer_decoder.c
+    src/liblzma/common/filter_buffer_encoder.c
+    src/liblzma/common/filter_common.c
+    src/liblzma/common/filter_common.h
+    src/liblzma/common/filter_decoder.c
+    src/liblzma/common/filter_decoder.h
+    src/liblzma/common/filter_encoder.c
+    src/liblzma/common/filter_encoder.h
+    src/liblzma/common/filter_flags_decoder.c
+    src/liblzma/common/filter_flags_encoder.c
+    src/liblzma/common/hardware_cputhreads.c
+    src/liblzma/common/hardware_physmem.c
+    src/liblzma/common/index.c
+    src/liblzma/common/index.h
+    src/liblzma/common/index_decoder.c
+    src/liblzma/common/index_decoder.h
+    src/liblzma/common/index_encoder.c
+    src/liblzma/common/index_encoder.h
+    src/liblzma/common/index_hash.c
+    src/liblzma/common/memcmplen.h
+    src/liblzma/common/outqueue.c
+    src/liblzma/common/outqueue.h
+    src/liblzma/common/stream_buffer_decoder.c
+    src/liblzma/common/stream_buffer_encoder.c
+    src/liblzma/common/stream_decoder.c
+    src/liblzma/common/stream_decoder.h
+    src/liblzma/common/stream_encoder.c
+    src/liblzma/common/stream_encoder_mt.c
+    src/liblzma/common/stream_flags_common.c
+    src/liblzma/common/stream_flags_common.h
+    src/liblzma/common/stream_flags_decoder.c
+    src/liblzma/common/stream_flags_encoder.c
+    src/liblzma/common/vli_decoder.c
+    src/liblzma/common/vli_encoder.c
+    src/liblzma/common/vli_size.c
+    src/liblzma/delta/delta_common.c
+    src/liblzma/delta/delta_common.h
+    src/liblzma/delta/delta_decoder.c
+    src/liblzma/delta/delta_decoder.h
+    src/liblzma/delta/delta_encoder.c
+    src/liblzma/delta/delta_encoder.h
+    src/liblzma/delta/delta_private.h
+    src/liblzma/lz/lz_decoder.c
+    src/liblzma/lz/lz_decoder.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/lzma/fastpos.h
+    src/liblzma/lzma/fastpos_table.c
+    src/liblzma/lzma/lzma2_decoder.c
+    src/liblzma/lzma/lzma2_decoder.h
+    src/liblzma/lzma/lzma2_encoder.c
+    src/liblzma/lzma/lzma2_encoder.h
+    src/liblzma/lzma/lzma_common.h
+    src/liblzma/lzma/lzma_decoder.c
+    src/liblzma/lzma/lzma_decoder.h
+    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_presets.c
+    src/liblzma/lzma/lzma_encoder_private.h
+    src/liblzma/rangecoder/price.h
+    src/liblzma/rangecoder/price_table.c
+    src/liblzma/rangecoder/range_common.h
+    src/liblzma/rangecoder/range_decoder.h
+    src/liblzma/rangecoder/range_encoder.h
+    src/liblzma/simple/arm.c
+    src/liblzma/simple/armthumb.c
+    src/liblzma/simple/ia64.c
+    src/liblzma/simple/powerpc.c
+    src/liblzma/simple/simple_coder.c
+    src/liblzma/simple/simple_coder.h
+    src/liblzma/simple/simple_decoder.c
+    src/liblzma/simple/simple_decoder.h
+    src/liblzma/simple/simple_encoder.c
+    src/liblzma/simple/simple_encoder.h
+    src/liblzma/simple/simple_private.h
+    src/liblzma/simple/sparc.c
+    src/liblzma/simple/x86.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
+)
+
+target_link_libraries(liblzma Threads::Threads)
+
+# Put the tuklib functions under the lzma_ namespace.
+target_compile_definitions(liblzma PRIVATE TUKLIB_SYMBOL_PREFIX=lzma_)
+tuklib_cpucores(liblzma)
+tuklib_physmem(liblzma)
+
+# immintrin.h:
+include(CheckIncludeFile)
+check_include_file(immintrin.h HAVE_IMMINTRIN_H)
+if(HAVE_IMMINTRIN_H)
+    target_compile_definitions(liblzma PRIVATE HAVE_IMMINTRIN_H)
+
+    # SSE2 intrinsics:
+    include(CheckCSourceCompiles)
+    check_c_source_compiles("
+            #include <immintrin.h>
+            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)
+endif()
+
+# Support -fvisiblity=hidden when building shared liblzma.
+# These lines do nothing on Windows (even under Cygwin).
+# HAVE_VISIBILITY should always be defined to 0 or 1.
+if(BUILD_SHARED_LIBS)
+    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)
+
+        # Export the public API symbols with __declspec(dllexport).
+        target_compile_definitions(liblzma PRIVATE DLL_EXPORT)
+    else()
+        # Disable __declspec(dllimport) when linking against static liblzma.
+        target_compile_definitions(liblzma INTERFACE LZMA_API_STATIC)
+    endif()
+elseif(CMAKE_SYSTEM_NAME MATCHES "^Linux$|^FreeBSD$")
+    # Symbol versioning for shared liblzma. This doesn't affect static builds.
+    target_link_options(liblzma PRIVATE
+        -Wl,--version-script=${CMAKE_CURRENT_SOURCE_DIR}/src/liblzma/liblzma.map
+    )
+    set_target_properties(liblzma PROPERTIES
+        LINK_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/src/liblzma/liblzma.map
+        LINK_DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/src/common/common_w32res.rc
+    )
+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 ""
+)
+
+# Create liblzmaConfigVersion.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}/liblzmaConfigVersion.cmake
+    VERSION ${liblzma_VERSION}
+    COMPATIBILITY SameMajorVersion)
+
+# Create liblzmaConfig.cmake.
+file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/liblzmaConfig.cmake
+"include(CMakeFindDependencyMacro)
+set(THREADS_PREFER_PTHREAD_FLAG TRUE)
+find_dependency(Threads)
+include(\"\${CMAKE_CURRENT_LIST_DIR}/liblzmaTargets.cmake\")
+")
+
+# Set CMAKE_INSTALL_LIBDIR and friends.
+include(GNUInstallDirs)
+
+# 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 liblzmaTargets.cmake
+        DESTINATION ${liblzma_INSTALL_CMAKEDIR}
+        COMPONENT liblzma_Development)
+
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/liblzmaConfig.cmake
+              ${CMAKE_CURRENT_BINARY_DIR}/liblzmaConfigVersion.cmake
+        DESTINATION ${liblzma_INSTALL_CMAKEDIR}
+        COMPONENT liblzma_Development)
+
+
+#############################################################################
+# getopt_long
+#############################################################################
+
+# The command line tools needs this.
+check_symbol_exists(getopt_long getopt.h HAVE_GETOPT_LONG)
+
+
+#############################################################################
+# xzdec
+#############################################################################
+
+if(HAVE_GETOPT_LONG)
+    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)
+
+    tuklib_progname(xzdec)
+
+    install(TARGETS xzdec
+            RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+                    COMPONENT xzdec)
+
+    if(UNIX)
+        install(FILES src/xzdec/xzdec.1
+                DESTINATION ${CMAKE_INSTALL_MANDIR}/man1
+                COMPONENT xzdec)
+    endif()
+endif()
+
+
+#############################################################################
+# xz
+#############################################################################
+
+if(NOT MSVC AND HAVE_GETOPT_LONG)
+    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/list.c
+        src/xz/list.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/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
+    )
+
+    target_link_libraries(xz PRIVATE liblzma)
+
+    target_compile_definitions(xz PRIVATE ASSUME_RAM=128)
+
+    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()
+
+    install(TARGETS xz
+            RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+                    COMPONENT xz)
+
+    install(FILES src/xz/xz.1
+            DESTINATION ${CMAKE_INSTALL_MANDIR}/man1
+            COMPONENT xz)
+endif()
diff --git a/cmake/tuklib_common.cmake b/cmake/tuklib_common.cmake
new file mode 100644
index 00000000..c3d2c536
--- /dev/null
+++ b/cmake/tuklib_common.cmake
@@ -0,0 +1,47 @@
+#
+# tuklib_common.cmake - common functions and macros for tuklib_*.cmake files
+#
+# Author: Lasse Collin
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+
+function(tuklib_add_definitions TARGET_OR_ALL DEFINITIONS)
+    if(TARGET_OR_ALL STREQUAL "ALL")
+        add_compile_definitions(${DEFINITIONS})
+    else()
+        target_compile_definitions(${TARGET_OR_ALL} PRIVATE ${DEFINITIONS})
+    endif()
+endfunction()
+
+function(tuklib_add_definition_if TARGET_OR_ALL VAR)
+    if(${VAR})
+        tuklib_add_definitions(${TARGET_OR_ALL} ${VAR})
+    endif()
+endfunction()
+
+# This is an over-simplified version of AC_USE_SYSTEM_EXTENSIONS in Autoconf
+# or gl_USE_SYSTEM_EXTENSIONS in gnulib.
+macro(tuklib_use_system_extensions TARGET_OR_ALL)
+    if(NOT WIN32)
+        # FIXME? The Solaris-specific __EXTENSIONS__ should be conditional
+        #        even on Solaris. See gnulib: git log m4/extensions.m4.
+        # FIXME? gnulib and autoconf.git has lots of new stuff.
+        tuklib_add_definitions(${TARGET_OR_ALL}
+            _GNU_SOURCE
+            __EXTENSIONS__
+            _POSIX_PTHREAD_SEMANTICS
+            _TANDEM_SOURCE
+            _ALL_SOURCE
+        )
+
+        list(APPEND CMAKE_REQUIRED_DEFINITIONS
+            -D_GNU_SOURCE
+            -D__EXTENSIONS__
+            -D_POSIX_PTHREAD_SEMANTICS
+            -D_TANDEM_SOURCE
+            -D_ALL_SOURCE
+        )
+    endif()
+endmacro()
diff --git a/cmake/tuklib_cpucores.cmake b/cmake/tuklib_cpucores.cmake
new file mode 100644
index 00000000..34546b0d
--- /dev/null
+++ b/cmake/tuklib_cpucores.cmake
@@ -0,0 +1,173 @@
+#
+# tuklib_cpucores.cmake - see tuklib_cpucores.m4 for description and comments
+#
+# Author: Lasse Collin
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+
+include(${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake)
+include(CheckCSourceCompiles)
+include(CheckIncludeFile)
+
+function(tuklib_cpucores_internal_check)
+    if(CACHE{TUKLIB_CPUCORES_DEFINITIONS})
+        return()
+    endif()
+
+    if(WIN32 OR CYGWIN)
+        # Nothing to do, the tuklib_cpucores.c handles it.
+        set(TUKLIB_CPUCORES_DEFINITIONS "" CACHE INTERNAL "")
+        return()
+    endif()
+
+    # glibc-based systems (GNU/Linux and GNU/kFreeBSD) have
+    # sched_getaffinity(). The CPU_COUNT() macro was added in glibc 2.9.
+    # glibc 2.9 is old enough that if someone uses the code on older glibc,
+    # the fallback to sysconf() should be good enough.
+    #
+    # NOTE: This required that _GNU_SOURCE is defined. We assume that whatever
+    #       feature test macros the caller wants to use are already set in
+    #       CMAKE_REQUIRED_DEFINES and in the target defines.
+    check_c_source_compiles("
+            #include <sched.h>
+            int main(void)
+            {
+                cpu_set_t cpu_mask;
+                sched_getaffinity(0, sizeof(cpu_mask), &cpu_mask);
+                return CPU_COUNT(&cpu_mask);
+            }
+        "
+        TUKLIB_CPUCORES_SCHED_GETAFFINITY)
+    if(TUKLIB_CPUCORES_SCHED_GETAFFINITY)
+        set(TUKLIB_CPUCORES_DEFINITIONS
+            "TUKLIB_CPUCORES_SCHED_GETAFFINITY"
+            CACHE INTERNAL "")
+        return()
+    endif()
+
+    # FreeBSD has both cpuset and sysctl. Look for cpuset first because
+    # it's a better approach.
+    #
+    # This test would match on GNU/kFreeBSD too but it would require
+    # -lfreebsd-glue when linking and thus in the current form this would
+    # fail on GNU/kFreeBSD. The above test for sched_getaffinity() matches
+    # on GNU/kFreeBSD so the test below should never run on that OS.
+    check_c_source_compiles("
+            #include <sys/param.h>
+            #include <sys/cpuset.h>
+            int main(void)
+            {
+                cpuset_t set;
+                cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1,
+                                   sizeof(set), &set);
+                return 0;
+            }
+        "
+        TUKLIB_CPUCORES_CPUSET)
+    if(TUKLIB_CPUCORES_CPUSET)
+        set(TUKLIB_CPUCORES_DEFINITIONS "HAVE_PARAM_H;TUKLIB_CPUCORES_CPUSET"
+            CACHE INTERNAL "")
+        return()
+    endif()
+
+    # On OS/2, both sysconf() and sysctl() pass the tests in this file,
+    # but only sysctl() works. On QNX it's the opposite: only sysconf() works
+    # (although it assumes that _POSIX_SOURCE, _XOPEN_SOURCE, and
+    # _POSIX_C_SOURCE are undefined or alternatively _QNX_SOURCE is defined).
+    #
+    # We test sysctl() first and intentionally break the sysctl() test on QNX
+    # so that sysctl() is never used on QNX.
+    check_include_file(sys/param.h HAVE_SYS_PARAM_H)
+    if(HAVE_SYS_PARAM_H)
+        list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_SYS_PARAM_H)
+    endif()
+    check_c_source_compiles("
+            #ifdef __QNX__
+            compile error
+            #endif
+            #ifdef HAVE_SYS_PARAM_H
+            #   include <sys/param.h>
+            #endif
+            #include <sys/sysctl.h>
+            int main(void)
+            {
+                int name[2] = { CTL_HW, HW_NCPU };
+                int cpus;
+                size_t cpus_size = sizeof(cpus);
+                sysctl(name, 2, &cpus, &cpus_size, NULL, 0);
+                return 0;
+            }
+        "
+        TUKLIB_CPUCORES_SYSCTL)
+    if(TUKLIB_CPUCORES_SYSCTL)
+        if(HAVE_SYS_PARAM_H)
+            set(TUKLIB_CPUCORES_DEFINITIONS
+                "HAVE_PARAM_H;TUKLIB_CPUCORES_SYSCTL"
+                CACHE INTERNAL "")
+        else()
+            set(TUKLIB_CPUCORES_DEFINITIONS
+                "TUKLIB_CPUCORES_SYSCTL"
+                CACHE INTERNAL "")
+        endif()
+        return()
+    endif()
+
+    # Many platforms support sysconf().
+    check_c_source_compiles("
+            #include <unistd.h>
+            int main(void)
+            {
+                long i;
+            #ifdef _SC_NPROCESSORS_ONLN
+                /* Many systems using sysconf() */
+                i = sysconf(_SC_NPROCESSORS_ONLN);
+            #else
+                /* IRIX */
+                i = sysconf(_SC_NPROC_ONLN);
+            #endif
+                return 0;
+            }
+        "
+        TUKLIB_CPUCORES_SYSCONF)
+    if(TUKLIB_CPUCORES_SYSCONF)
+        set(TUKLIB_CPUCORES_DEFINITIONS "TUKLIB_CPUCORES_SYSCONF"
+            CACHE INTERNAL "")
+        return()
+    endif()
+
+    # HP-UX
+    check_c_source_compiles("
+            #include <sys/param.h>
+            #include <sys/pstat.h>
+            int main(void)
+            {
+                struct pst_dynamic pst;
+                pstat_getdynamic(&pst, sizeof(pst), 1, 0);
+                (void)pst.psd_proc_cnt;
+                return 0;
+            }
+        "
+        TUKLIB_CPUCORES_PSTAT_GETDYNAMIC)
+    if(TUKLIB_CPUCORES_PSTAT_GETDYNAMIC)
+        set(TUKLIB_CPUCORES_DEFINITIONS "TUKLIB_CPUCORES_PSTAT_GETDYNAMIC"
+            CACHE INTERNAL "")
+        return()
+    endif()
+endfunction()
+
+function(tuklib_cpucores TARGET_OR_ALL)
+    message(STATUS "Checking how to detect the number of available CPU cores")
+
+    tuklib_cpucores_internal_check()
+
+    if(NOT DEFINED CACHE{TUKLIB_CPUCORES_DEFINITIONS})
+        set(TUKLIB_CPUCORES_FOUND 0 PARENT_SCOPE)
+        message(WARNING
+                "No method to detect the number of CPU cores was found")
+    else()
+        set(TUKLIB_CPUCORES_FOUND 1 PARENT_SCOPE)
+        tuklib_add_definitions(${TARGET_OR_ALL} ${TUKLIB_CPUCORES_DEFINITIONS})
+    endif()
+endfunction()
diff --git a/cmake/tuklib_integer.cmake b/cmake/tuklib_integer.cmake
new file mode 100644
index 00000000..aeb7ff6f
--- /dev/null
+++ b/cmake/tuklib_integer.cmake
@@ -0,0 +1,100 @@
+#
+# tuklib_integer.cmake - see tuklib_integer.m4 for description and comments
+#
+# Author: Lasse Collin
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+
+include(${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake)
+include(TestBigEndian)
+include(CheckCSourceCompiles)
+include(CheckIncludeFile)
+include(CheckSymbolExists)
+
+function(tuklib_integer TARGET_OR_ALL)
+    # Check for endianness. Unlike the Autoconf's AC_C_BIGENDIAN, this doesn't
+    # support Apple universal binaries. The CMake module will leave the
+    # variable unset so we can catch that situation here instead of continuing
+    # as if we were little endian.
+    test_big_endian(WORDS_BIGENDIAN)
+    if(NOT DEFINED WORDS_BIGENDIAN)
+        message(FATAL_ERROR "Cannot determine endianness")
+    endif()
+    tuklib_add_definition_if(${TARGET_OR_ALL} WORDS_BIGENDIAN)
+
+    # Look for a byteswapping method.
+    check_c_source_compiles("
+            int main(void)
+            {
+                __builtin_bswap16(1);
+                __builtin_bswap32(1);
+                __builtin_bswap64(1);
+                return 0;
+            }
+        "
+        HAVE___BUILTIN_BSWAPXX)
+    if(HAVE___BUILTIN_BSWAPXX)
+        tuklib_add_definitions(${TARGET_OR_ALL} HAVE___BUILTIN_BSWAPXX)
+    else()
+        check_include_file(byteswap.h HAVE_BYTESWAP_H)
+        if(HAVE_BYTESWAP_H)
+            tuklib_add_definitions(${TARGET_OR_ALL} HAVE_BYTESWAP_H)
+            check_symbol_exists(bswap_16 byteswap.h HAVE_BSWAP_16)
+            tuklib_add_definition_if(${TARGET_OR_ALL} HAVE_BSWAP_16)
+            check_symbol_exists(bswap_32 byteswap.h HAVE_BSWAP_32)
+            tuklib_add_definition_if(${TARGET_OR_ALL} HAVE_BSWAP_32)
+            check_symbol_exists(bswap_64 byteswap.h HAVE_BSWAP_64)
+            tuklib_add_definition_if(${TARGET_OR_ALL} HAVE_BSWAP_64)
+        else()
+            check_include_file(sys/endian.h HAVE_SYS_ENDIAN_H)
+            if(HAVE_SYS_ENDIAN_H)
+                tuklib_add_definitions(${TARGET_OR_ALL} HAVE_SYS_ENDIAN_H)
+            else()
+                check_include_file(sys/byteorder.h HAVE_SYS_BYTEORDER_H)
+                tuklib_add_definition_if(${TARGET_OR_ALL} HAVE_SYS_BYTEORDER_H)
+            endif()
+        endif()
+    endif()
+
+    # 16-bit and 32-bit unaligned access is fast on x86(-64),
+    # big endian PowerPC, and usually on 32/64-bit ARM too.
+    # There are others too and ARM could be a false match.
+    #
+    # Guess the default value for the option.
+    # CMake's ability to give info about the target arch seems bad.
+    # The the same arch can have different name depending on the OS.
+    #
+    # FIXME: The regex is based on guessing, not on factual information!
+    #
+    # NOTE: Compared to the Autoconf test, this lacks the GCC/Clang test
+    #       on ARM and always assumes that unaligned is fast on ARM.
+    set(FAST_UNALIGNED_GUESS OFF)
+    if(CMAKE_SYSTEM_PROCESSOR MATCHES
+       [Xx3456]86|^[Xx]64|^[Aa][Mm][Dd]64|^[Aa][Rr][Mm]|^aarch|^powerpc|^ppc)
+        if(NOT WORDS_BIGENDIAN OR
+           NOT CMAKE_SYSTEM_PROCESSOR MATCHES ^powerpc|^ppc)
+           set(FAST_UNALIGNED_GUESS ON)
+        endif()
+    endif()
+    option(TUKLIB_FAST_UNALIGNED_ACCESS
+           "Enable if the system supports *fast* unaligned memory access with 16-bit and 32-bit integers."
+           ${FAST_UNALIGNED_GUESS})
+    tuklib_add_definition_if(${TARGET_OR_ALL} TUKLIB_FAST_UNALIGNED_ACCESS)
+
+    # Unsafe type punning:
+    option(TUKLIB_USE_UNSAFE_TYPE_PUNNING
+           "This introduces strict aliasing violations and \
+may result in broken code. However, this might improve performance \
+in some cases, especially with old compilers \
+(e.g. GCC 3 and early 4.x on x86, GCC < 6 on ARMv6 and ARMv7)."
+           OFF)
+    tuklib_add_definition_if(${TARGET_OR_ALL} TUKLIB_USE_UNSAFE_TYPE_PUNNING)
+
+    # Check for GCC/Clang __builtin_assume_aligned().
+    check_c_source_compiles(
+        "int main(void) { __builtin_assume_aligned(\"\", 1); return 0; }"
+        HAVE___BUILTIN_ASSUME_ALIGNED)
+    tuklib_add_definition_if(${TARGET_OR_ALL} HAVE___BUILTIN_ASSUME_ALIGNED)
+endfunction()
diff --git a/cmake/tuklib_mbstr.cmake b/cmake/tuklib_mbstr.cmake
new file mode 100644
index 00000000..a39a96b4
--- /dev/null
+++ b/cmake/tuklib_mbstr.cmake
@@ -0,0 +1,20 @@
+#
+# tuklib_mbstr.cmake - see tuklib_mbstr.m4 for description and comments
+#
+# Author: Lasse Collin
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+
+include(${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake)
+include(CheckSymbolExists)
+
+function(tuklib_mbstr TARGET_OR_ALL)
+    check_symbol_exists(mbrtowc wchar.h HAVE_MBRTOWC)
+    tuklib_add_definition_if(${TARGET_OR_ALL} HAVE_MBRTOWC)
+
+    # NOTE: wcwidth() requires _GNU_SOURCE or _XOPEN_SOURCE on GNU/Linux.
+    check_symbol_exists(wcwidth wchar.h HAVE_WCWIDTH)
+    tuklib_add_definition_if(${TARGET_OR_ALL} HAVE_WCWIDTH)
+endfunction()
diff --git a/cmake/tuklib_physmem.cmake b/cmake/tuklib_physmem.cmake
new file mode 100644
index 00000000..dc895a15
--- /dev/null
+++ b/cmake/tuklib_physmem.cmake
@@ -0,0 +1,149 @@
+#
+# tuklib_physmem.cmake - see tuklib_physmem.m4 for description and comments
+#
+# NOTE: Compared tuklib_physmem.m4, this lacks support for Tru64, IRIX, and
+# Linux sysinfo() (usually sysconf() is used on GNU/Linux).
+#
+# Author: Lasse Collin
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+
+include(${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake)
+include(CheckCSourceCompiles)
+include(CheckIncludeFile)
+
+function(tuklib_physmem_internal_check)
+    if(CACHE{TUKLIB_PHYSMEM_DEFINITIONS})
+        return()
+    endif()
+
+    # Shortcut on Windows:
+    if(WIN32 OR CYGWIN)
+        # Nothing to do, the tuklib_physmem.c handles it.
+        set(TUKLIB_PHYSMEM_DEFINITIONS "" CACHE INTERNAL "")
+        return()
+    endif()
+
+    # Full check for special cases:
+    check_c_source_compiles("
+            #if defined(_WIN32) || defined(__CYGWIN__) || defined(__OS2__) \
+                || defined(__DJGPP__) || defined(__VMS) \
+                || defined(AMIGA) || defined(__AROS__) || defined(__QNX__)
+            int main(void) { return 0; }
+            #else
+            compile error
+            #endif
+        "
+        TUKLIB_PHYSMEM_SPECIAL)
+    if(TUKLIB_PHYSMEM_SPECIAL)
+        # Nothing to do, the tuklib_physmem.c handles it.
+        set(TUKLIB_PHYSMEM_DEFINITIONS "" CACHE INTERNAL "")
+        return()
+    endif()
+
+    # Look for AIX-specific solution before sysconf(), because the test
+    # for sysconf() will pass on AIX but won't actually work
+    # (sysconf(_SC_PHYS_PAGES) compiles but always returns -1 on AIX).
+    check_c_source_compiles("
+            #include <sys/systemcfg.h>
+            int main(void)
+            {
+                (void)_system_configuration.physmem;
+                return 0;
+            }
+        "
+        TUKLIB_PHYSMEM_AIX)
+    if(TUKLIB_PHYSMEM_AIX)
+        set(TUKLIB_PHYSMEM_DEFINITIONS "TUKLIB_PHYSMEM_AIX" CACHE INTERNAL "")
+        return()
+    endif()
+
+    # sysconf()
+    check_c_source_compiles("
+            #include <unistd.h>
+            int main(void)
+            {
+                long i;
+                i = sysconf(_SC_PAGESIZE);
+                i = sysconf(_SC_PHYS_PAGES);
+                return 0;
+            }
+        "
+        TUKLIB_PHYSMEM_SYSCONF)
+    if(TUKLIB_PHYSMEM_SYSCONF)
+        set(TUKLIB_PHYSMEM_DEFINITIONS "TUKLIB_PHYSMEM_SYSCONF"
+            CACHE INTERNAL "")
+        return()
+    endif()
+
+    # sysctl()
+    check_include_file(sys/param.h HAVE_SYS_PARAM_H)
+    if(HAVE_SYS_PARAM_H)
+        list(APPEND CMAKE_REQUIRED_DEFINITIONS -DHAVE_SYS_PARAM_H)
+    endif()
+
+    check_c_source_compiles("
+            #ifdef HAVE_SYS_PARAM_H
+            #   include <sys/param.h>
+            #endif
+            #include <sys/sysctl.h>
+            int main(void)
+            {
+                int name[2] = { CTL_HW, HW_PHYSMEM };
+                unsigned long mem;
+                size_t mem_ptr_size = sizeof(mem);
+                sysctl(name, 2, &mem, &mem_ptr_size, NULL, 0);
+                return 0;
+            }
+        "
+        TUKLIB_PHYSMEM_SYSCTL)
+    if(TUKLIB_PHYSMEM_SYSCTL)
+        if(HAVE_SYS_PARAM_H)
+            set(TUKLIB_PHYSMEM_DEFINITIONS
+                "HAVE_PARAM_H;TUKLIB_PHYSMEM_SYSCTL"
+                CACHE INTERNAL "")
+        else()
+            set(TUKLIB_PHYSMEM_DEFINITIONS
+                "TUKLIB_PHYSMEM_SYSCTL"
+                CACHE INTERNAL "")
+        endif()
+        return()
+    endif()
+
+    # HP-UX
+    check_c_source_compiles("
+            #include <sys/param.h>
+            #include <sys/pstat.h>
+            int main(void)
+            {
+                struct pst_static pst;
+                pstat_getstatic(&pst, sizeof(pst), 1, 0);
+                (void)pst.physical_memory;
+                (void)pst.page_size;
+                return 0;
+            }
+        "
+        TUKLIB_PHYSMEM_PSTAT_GETSTATIC)
+    if(TUKLIB_PHYSMEM_PSTAT_GETSTATIC)
+        set(TUKLIB_PHYSMEM_DEFINITIONS "TUKLIB_PHYSMEM_PSTAT_GETSTATIC"
+            CACHE INTERNAL "")
+        return()
+    endif()
+endfunction()
+
+function(tuklib_physmem TARGET_OR_ALL)
+    message(STATUS "Checking how to detect the amount of physical memory")
+
+    tuklib_physmem_internal_check()
+
+    if(NOT DEFINED CACHE{TUKLIB_PHYSMEM_DEFINITIONS})
+        set(TUKLIB_PHYSMEM_FOUND 0 PARENT_SCOPE)
+        message(WARNING
+                "No method to detect the amount of physical memory was found")
+    else()
+        set(TUKLIB_PHYSMEM_FOUND 1 PARENT_SCOPE)
+        tuklib_add_definitions(${TARGET_OR_ALL} ${TUKLIB_PHYSMEM_DEFINITIONS})
+    endif()
+endfunction()
diff --git a/cmake/tuklib_progname.cmake b/cmake/tuklib_progname.cmake
new file mode 100644
index 00000000..417495e6
--- /dev/null
+++ b/cmake/tuklib_progname.cmake
@@ -0,0 +1,19 @@
+#
+# tuklib_progname.cmake - see tuklib_progname.m4 for description and comments
+#
+# Author: Lasse Collin
+#
+# This file has been put into the public domain.
+# You can do whatever you want with this file.
+#
+
+include(${CMAKE_CURRENT_LIST_DIR}/tuklib_common.cmake)
+include(CheckSymbolExists)
+
+function(tuklib_progname TARGET_OR_ALL)
+    # NOTE: This glibc extension requires _GNU_SOURCE.
+    check_symbol_exists(program_invocation_name errno.h
+                        HAVE_DECL_PROGRAM_INVOCATION_NAME)
+    tuklib_add_definition_if(${TARGET_OR_ALL}
+                             HAVE_DECL_PROGRAM_INVOCATION_NAME)
+endfunction()