be7ad261d5
Not all Linux distributions is LSB-compliant, notably RHEL 6, so we should make an effort to check various known other files in order to identify the distribution.
51 lines
1.9 KiB
CMake
51 lines
1.9 KiB
CMake
# - Print CMake and OS distribution version
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#
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function (system_info)
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message (STATUS "CMake version: ${CMAKE_VERSION}")
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if (CMAKE_SYSTEM MATCHES "Linux")
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distro_name (DISTRO_NAME)
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message (STATUS "Linux distribution: ${DISTRO_NAME}")
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else (CMAKE_SYSTEM MATCHES "Linux")
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message (STATUS "Operating system: ${CMAKE_SYSTEM}")
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endif (CMAKE_SYSTEM MATCHES "Linux")
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endfunction (system_info)
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# probe various system files that may be found
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function (distro_name varname)
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file (GLOB has_os_release /etc/os-release)
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file (GLOB has_lsb_release /etc/lsb-release)
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file (GLOB has_sys_release /etc/system-release)
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# start with /etc/os-release,
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# see <http://0pointer.de/blog/projects/os-release.html>
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if (NOT has_os_release STREQUAL "")
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read_release (PRETTY_NAME FROM /etc/os-release INTO _descr)
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# previous "standard", used on older Ubuntu and Debian
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elseif (NOT has_lsb_release STREQUAL "")
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read_release (DISTRIB_DESCRIPTION FROM /etc/lsb-release INTO _descr)
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# RHEL/CentOS etc. has just a text-file
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elseif (NOT has_sys_release STREQUAL "")
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file (READ /etc/system-release _descr)
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else (NOT has_lsb_release STREQUAL "")
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# no yet known release file found
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set (_descr "unknown")
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endif (NOT has_os_release STREQUAL "")
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# return from function (into appropriate variable)
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string (STRIP "${_descr}" _descr)
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set (${varname} "${_descr}" PARENT_SCOPE)
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endfunction (distro_name varname)
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# read property from the newer /etc/os-release
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function (read_release valuename FROM filename INTO varname)
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file (STRINGS ${filename} _distrib
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REGEX "^${valuename}="
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)
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string (REGEX REPLACE
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"^${valuename}=\"?\(.*\)" "\\1" ${varname} ${_distrib}
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)
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# remove trailing quote that got globbed by the wildcard (greedy match)
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string (REGEX REPLACE
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"\"$" "" ${varname} "${${varname}}"
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)
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set (${varname} "${${varname}}" PARENT_SCOPE)
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endfunction (read_release valuename FROM filename INTO varname)
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