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404 lines
12 KiB
404 lines
12 KiB
cmake_host_system_information
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-----------------------------
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Query various host system information.
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Synopsis
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^^^^^^^^
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.. parsed-literal::
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`Query host system specific information`_
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cmake_host_system_information(RESULT <variable> QUERY <key> ...)
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`Query Windows registry`_
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cmake_host_system_information(RESULT <variable> QUERY WINDOWS_REGISTRY <key> ...)
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Query host system specific information
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. code-block:: cmake
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cmake_host_system_information(RESULT <variable> QUERY <key> ...)
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Queries system information of the host system on which cmake runs.
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One or more ``<key>`` can be provided to select the information to be
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queried. The list of queried values is stored in ``<variable>``.
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``<key>`` can be one of the following values:
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``NUMBER_OF_LOGICAL_CORES``
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Number of logical cores
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``NUMBER_OF_PHYSICAL_CORES``
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Number of physical cores
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``HOSTNAME``
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Hostname
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``FQDN``
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Fully qualified domain name
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``TOTAL_VIRTUAL_MEMORY``
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Total virtual memory in MiB [#mebibytes]_
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``AVAILABLE_VIRTUAL_MEMORY``
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Available virtual memory in MiB [#mebibytes]_
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``TOTAL_PHYSICAL_MEMORY``
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Total physical memory in MiB [#mebibytes]_
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``AVAILABLE_PHYSICAL_MEMORY``
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Available physical memory in MiB [#mebibytes]_
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``IS_64BIT``
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.. versionadded:: 3.10
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One if processor is 64Bit
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``HAS_FPU``
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.. versionadded:: 3.10
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One if processor has floating point unit
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``HAS_MMX``
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.. versionadded:: 3.10
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One if processor supports MMX instructions
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``HAS_MMX_PLUS``
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.. versionadded:: 3.10
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One if processor supports Ext. MMX instructions
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``HAS_SSE``
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.. versionadded:: 3.10
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One if processor supports SSE instructions
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``HAS_SSE2``
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.. versionadded:: 3.10
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One if processor supports SSE2 instructions
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``HAS_SSE_FP``
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.. versionadded:: 3.10
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One if processor supports SSE FP instructions
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``HAS_SSE_MMX``
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.. versionadded:: 3.10
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One if processor supports SSE MMX instructions
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``HAS_AMD_3DNOW``
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.. versionadded:: 3.10
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One if processor supports 3DNow instructions
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``HAS_AMD_3DNOW_PLUS``
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.. versionadded:: 3.10
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One if processor supports 3DNow+ instructions
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``HAS_IA64``
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.. versionadded:: 3.10
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One if IA64 processor emulating x86
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``HAS_SERIAL_NUMBER``
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.. versionadded:: 3.10
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One if processor has serial number
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``PROCESSOR_SERIAL_NUMBER``
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.. versionadded:: 3.10
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Processor serial number
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``PROCESSOR_NAME``
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.. versionadded:: 3.10
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Human readable processor name
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``PROCESSOR_DESCRIPTION``
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.. versionadded:: 3.10
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Human readable full processor description
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``OS_NAME``
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.. versionadded:: 3.10
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See :variable:`CMAKE_HOST_SYSTEM_NAME`
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``OS_RELEASE``
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.. versionadded:: 3.10
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The OS sub-type e.g. on Windows ``Professional``
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``OS_VERSION``
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.. versionadded:: 3.10
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The OS build ID
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``OS_PLATFORM``
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.. versionadded:: 3.10
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See :variable:`CMAKE_HOST_SYSTEM_PROCESSOR`
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``MSYSTEM_PREFIX``
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.. versionadded:: 3.28
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Available only on Windows hosts. In a MSYS or MinGW development
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environment that sets the ``MSYSTEM`` environment variable, this
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is its installation prefix. Otherwise, this is the empty string.
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``DISTRIB_INFO``
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.. versionadded:: 3.22
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Read :file:`/etc/os-release` file and define the given ``<variable>``
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into a list of read variables
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``DISTRIB_<name>``
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.. versionadded:: 3.22
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Get the ``<name>`` variable (see `man 5 os-release`_) if it exists in the
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:file:`/etc/os-release` file
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Example:
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.. code-block:: cmake
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cmake_host_system_information(RESULT PRETTY_NAME QUERY DISTRIB_PRETTY_NAME)
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message(STATUS "${PRETTY_NAME}")
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cmake_host_system_information(RESULT DISTRO QUERY DISTRIB_INFO)
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foreach(VAR IN LISTS DISTRO)
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message(STATUS "${VAR}=`${${VAR}}`")
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endforeach()
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Output::
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-- Ubuntu 20.04.2 LTS
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-- DISTRO_BUG_REPORT_URL=`https://bugs.launchpad.net/ubuntu/`
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-- DISTRO_HOME_URL=`https://www.ubuntu.com/`
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-- DISTRO_ID=`ubuntu`
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-- DISTRO_ID_LIKE=`debian`
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-- DISTRO_NAME=`Ubuntu`
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-- DISTRO_PRETTY_NAME=`Ubuntu 20.04.2 LTS`
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-- DISTRO_PRIVACY_POLICY_URL=`https://www.ubuntu.com/legal/terms-and-policies/privacy-policy`
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-- DISTRO_SUPPORT_URL=`https://help.ubuntu.com/`
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-- DISTRO_UBUNTU_CODENAME=`focal`
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-- DISTRO_VERSION=`20.04.2 LTS (Focal Fossa)`
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-- DISTRO_VERSION_CODENAME=`focal`
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-- DISTRO_VERSION_ID=`20.04`
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If :file:`/etc/os-release` file is not found, the command tries to gather OS
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identification via fallback scripts. The fallback script can use `various
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distribution-specific files`_ to collect OS identification data and map it
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into `man 5 os-release`_ variables.
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Fallback Interface Variables
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""""""""""""""""""""""""""""
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.. variable:: CMAKE_GET_OS_RELEASE_FALLBACK_SCRIPTS
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In addition to the scripts shipped with CMake, a user may append full
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paths to his script(s) to the this list. The script filename has the
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following format: ``NNN-<name>.cmake``, where ``NNN`` is three digits
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used to apply collected scripts in a specific order.
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.. variable:: CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_<varname>
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Variables collected by the user provided fallback script
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ought to be assigned to CMake variables using this naming
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convention. Example, the ``ID`` variable from the manual becomes
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``CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_ID``.
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.. variable:: CMAKE_GET_OS_RELEASE_FALLBACK_RESULT
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The fallback script ought to store names of all assigned
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``CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_<varname>`` variables in this list.
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Example:
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.. code-block:: cmake
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# Try to detect some old distribution
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# See also
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# - http://linuxmafia.com/faq/Admin/release-files.html
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#
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if(NOT EXISTS "${CMAKE_SYSROOT}/etc/foobar-release")
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return()
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endif()
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# Get the first string only
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file(
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STRINGS "${CMAKE_SYSROOT}/etc/foobar-release" CMAKE_GET_OS_RELEASE_FALLBACK_CONTENT
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LIMIT_COUNT 1
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)
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#
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# Example:
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#
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# Foobar distribution release 1.2.3 (server)
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#
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if(CMAKE_GET_OS_RELEASE_FALLBACK_CONTENT MATCHES "Foobar distribution release ([0-9\.]+) .*")
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set(CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_NAME Foobar)
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set(CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_PRETTY_NAME "${CMAKE_GET_OS_RELEASE_FALLBACK_CONTENT}")
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set(CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_ID foobar)
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set(CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_VERSION ${CMAKE_MATCH_1})
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set(CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_VERSION_ID ${CMAKE_MATCH_1})
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list(
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APPEND CMAKE_GET_OS_RELEASE_FALLBACK_RESULT
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CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_NAME
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CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_PRETTY_NAME
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CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_ID
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CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_VERSION
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CMAKE_GET_OS_RELEASE_FALLBACK_RESULT_VERSION_ID
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)
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endif()
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unset(CMAKE_GET_OS_RELEASE_FALLBACK_CONTENT)
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.. rubric:: Footnotes
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.. [#mebibytes] One MiB (mebibyte) is equal to 1024x1024 bytes.
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.. _man 5 os-release: https://www.freedesktop.org/software/systemd/man/os-release.html
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.. _various distribution-specific files: http://linuxmafia.com/faq/Admin/release-files.html
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.. _Query Windows registry:
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Query Windows registry
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^^^^^^^^^^^^^^^^^^^^^^
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.. versionadded:: 3.24
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::
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cmake_host_system_information(RESULT <variable>
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QUERY WINDOWS_REGISTRY <key> [VALUE_NAMES|SUBKEYS|VALUE <name>]
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[VIEW (64|32|64_32|32_64|HOST|TARGET|BOTH)]
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[SEPARATOR <separator>]
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[ERROR_VARIABLE <result>])
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Performs query operations on local computer registry subkey. Returns a list of
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subkeys or value names that are located under the specified subkey in the
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registry or the data of the specified value name. The result of the queried
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entity is stored in ``<variable>``.
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.. note::
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Querying registry for any other platforms than ``Windows``, including
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``CYGWIN``, will always returns an empty string and sets an error message in
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the variable specified with sub-option ``ERROR_VARIABLE``.
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``<key>`` specify the full path of a subkey on the local computer. The
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``<key>`` must include a valid root key. Valid root keys for the local computer
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are:
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* ``HKLM`` or ``HKEY_LOCAL_MACHINE``
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* ``HKCU`` or ``HKEY_CURRENT_USER``
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* ``HKCR`` or ``HKEY_CLASSES_ROOT``
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* ``HKU`` or ``HKEY_USERS``
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* ``HKCC`` or ``HKEY_CURRENT_CONFIG``
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And, optionally, the path to a subkey under the specified root key. The path
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separator can be the slash or the backslash. ``<key>`` is not case sensitive.
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For example:
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.. code-block:: cmake
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cmake_host_system_information(RESULT result QUERY WINDOWS_REGISTRY "HKLM")
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cmake_host_system_information(RESULT result QUERY WINDOWS_REGISTRY "HKLM/SOFTWARE/Kitware")
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cmake_host_system_information(RESULT result QUERY WINDOWS_REGISTRY "HKCU\\SOFTWARE\\Kitware")
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``VALUE_NAMES``
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Request the list of value names defined under ``<key>``. If a default value
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is defined, it will be identified with the special name ``(default)``.
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``SUBKEYS``
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Request the list of subkeys defined under ``<key>``.
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``VALUE <name>``
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Request the data stored in value named ``<name>``. If ``VALUE`` is not
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specified or argument is the special name ``(default)``, the content of the
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default value, if any, will be returned.
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.. code-block:: cmake
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# query default value for HKLM/SOFTWARE/Kitware key
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cmake_host_system_information(RESULT result
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QUERY WINDOWS_REGISTRY "HKLM/SOFTWARE/Kitware")
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# query default value for HKLM/SOFTWARE/Kitware key using special value name
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cmake_host_system_information(RESULT result
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QUERY WINDOWS_REGISTRY "HKLM/SOFTWARE/Kitware"
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VALUE "(default)")
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Supported types are:
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* ``REG_SZ``.
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* ``REG_EXPAND_SZ``. The returned data is expanded.
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* ``REG_MULTI_SZ``. The returned is expressed as a CMake list. See also
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``SEPARATOR`` sub-option.
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* ``REG_DWORD``.
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* ``REG_QWORD``.
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For all other types, an empty string is returned.
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``VIEW``
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Specify which registry views must be queried. When not specified, ``BOTH``
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view is used.
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``64``
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Query the 64bit registry. On ``32bit Windows``, returns always an empty
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string.
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``32``
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Query the 32bit registry.
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``64_32``
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For ``VALUE`` sub-option or default value, query the registry using view
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``64``, and if the request failed, query the registry using view ``32``.
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For ``VALUE_NAMES`` and ``SUBKEYS`` sub-options, query both views (``64``
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and ``32``) and merge the results (sorted and duplicates removed).
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``32_64``
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For ``VALUE`` sub-option or default value, query the registry using view
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``32``, and if the request failed, query the registry using view ``64``.
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For ``VALUE_NAMES`` and ``SUBKEYS`` sub-options, query both views (``32``
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and ``64``) and merge the results (sorted and duplicates removed).
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``HOST``
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Query the registry matching the architecture of the host: ``64`` on ``64bit
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Windows`` and ``32`` on ``32bit Windows``.
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``TARGET``
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Query the registry matching the architecture specified by
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:variable:`CMAKE_SIZEOF_VOID_P` variable. If not defined, fallback to
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``HOST`` view.
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``BOTH``
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Query both views (``32`` and ``64``). The order depends of the following
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rules: If :variable:`CMAKE_SIZEOF_VOID_P` variable is defined. Use the
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following view depending of the content of this variable:
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* ``8``: ``64_32``
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* ``4``: ``32_64``
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If :variable:`CMAKE_SIZEOF_VOID_P` variable is not defined, rely on
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architecture of the host:
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* ``64bit``: ``64_32``
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* ``32bit``: ``32``
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``SEPARATOR``
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Specify the separator character for ``REG_MULTI_SZ`` type. When not
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specified, the character ``\0`` is used.
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``ERROR_VARIABLE <result>``
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Returns any error raised during query operation. In case of success, the
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variable holds an empty string.
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