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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file LICENSE.rst or https://cmake.org/licensing for details.
# This module is used by the Makefile generator to determine the following variables:
# CMAKE_SYSTEM_NAME - on unix this is uname -s, for windows it is Windows
# CMAKE_SYSTEM_VERSION - on unix this is uname -r, for windows it is empty
# CMAKE_SYSTEM - ${CMAKE_SYSTEM}-${CMAKE_SYSTEM_VERSION}, for windows: ${CMAKE_SYSTEM}
# find out on which system cmake runs
if(CMAKE_HOST_UNIX)
find_program(CMAKE_UNAME NAMES uname PATHS /bin /usr/bin /usr/local/bin)
if(CMAKE_UNAME)
if(CMAKE_HOST_SYSTEM_NAME STREQUAL "AIX")
execute_process(COMMAND ${CMAKE_UNAME} -v
OUTPUT_VARIABLE _CMAKE_HOST_SYSTEM_MAJOR_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
execute_process(COMMAND ${CMAKE_UNAME} -r
OUTPUT_VARIABLE _CMAKE_HOST_SYSTEM_MINOR_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
set(CMAKE_HOST_SYSTEM_VERSION "${_CMAKE_HOST_SYSTEM_MAJOR_VERSION}.${_CMAKE_HOST_SYSTEM_MINOR_VERSION}")
unset(_CMAKE_HOST_SYSTEM_MAJOR_VERSION)
unset(_CMAKE_HOST_SYSTEM_MINOR_VERSION)
elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Android")
execute_process(COMMAND getprop ro.build.version.sdk
OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
if(NOT DEFINED CMAKE_SYSTEM_VERSION)
set(_ANDROID_API_LEVEL_H $ENV{PREFIX}/include/android/api-level.h)
set(_ANDROID_API_REGEX "#define __ANDROID_API__ ([0-9]+)")
file(READ ${_ANDROID_API_LEVEL_H} _ANDROID_API_LEVEL_H_CONTENT)
string(REGEX MATCH ${_ANDROID_API_REGEX} _ANDROID_API_LINE "${_ANDROID_API_LEVEL_H_CONTENT}")
string(REGEX REPLACE ${_ANDROID_API_REGEX} "\\1" _ANDROID_API "${_ANDROID_API_LINE}")
if(_ANDROID_API)
set(CMAKE_SYSTEM_VERSION "${_ANDROID_API}")
endif()
unset(_ANDROID_API_LEVEL_H)
unset(_ANDROID_API_LEVEL_H_CONTENT)
unset(_ANDROID_API_REGEX)
unset(_ANDROID_API_LINE)
unset(_ANDROID_API)
endif()
else()
execute_process(COMMAND ${CMAKE_UNAME} -r
OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
endif()
if(CMAKE_HOST_SYSTEM_NAME MATCHES "Linux|CYGWIN.*|MSYS.*|^GNU$|Android")
execute_process(COMMAND ${CMAKE_UNAME} -m
OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_PROCESSOR
RESULT_VARIABLE val
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
elseif(CMAKE_HOST_SYSTEM_NAME MATCHES "Darwin")
# If we are running on Apple Silicon, honor CMAKE_APPLE_SILICON_PROCESSOR.
if(DEFINED CMAKE_APPLE_SILICON_PROCESSOR)
set(_CMAKE_APPLE_SILICON_PROCESSOR "${CMAKE_APPLE_SILICON_PROCESSOR}")
elseif(DEFINED ENV{CMAKE_APPLE_SILICON_PROCESSOR})
set(_CMAKE_APPLE_SILICON_PROCESSOR "$ENV{CMAKE_APPLE_SILICON_PROCESSOR}")
else()
set(_CMAKE_APPLE_SILICON_PROCESSOR "")
endif()
if(_CMAKE_APPLE_SILICON_PROCESSOR)
if(";${_CMAKE_APPLE_SILICON_PROCESSOR};" MATCHES "^;(arm64|x86_64);$")
execute_process(COMMAND sysctl -q hw.optional.arm64
OUTPUT_VARIABLE _sysctl_stdout
ERROR_VARIABLE _sysctl_stderr
RESULT_VARIABLE _sysctl_result
)
if(NOT _sysctl_result EQUAL 0 OR NOT _sysctl_stdout MATCHES "hw.optional.arm64: 1")
set(_CMAKE_APPLE_SILICON_PROCESSOR "")
endif()
unset(_sysctl_result)
unset(_sysctl_stderr)
unset(_sysctl_stdout)
endif()
endif()
if(_CMAKE_APPLE_SILICON_PROCESSOR)
set(CMAKE_HOST_SYSTEM_PROCESSOR "${_CMAKE_APPLE_SILICON_PROCESSOR}")
else()
execute_process(COMMAND ${CMAKE_UNAME} -m
OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_PROCESSOR
RESULT_VARIABLE val
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
endif()
unset(_CMAKE_APPLE_SILICON_PROCESSOR)
if(CMAKE_HOST_SYSTEM_PROCESSOR STREQUAL "Power Macintosh")
# OS X ppc 'uname -m' may report 'Power Macintosh' instead of 'powerpc'
set(CMAKE_HOST_SYSTEM_PROCESSOR "powerpc")
endif()
elseif(CMAKE_HOST_SYSTEM_NAME MATCHES "OpenBSD")
execute_process(COMMAND arch -s
OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_PROCESSOR
RESULT_VARIABLE val
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
else()
execute_process(COMMAND ${CMAKE_UNAME} -p
OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_PROCESSOR
RESULT_VARIABLE val
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
if("${val}" GREATER 0)
execute_process(COMMAND ${CMAKE_UNAME} -m
OUTPUT_VARIABLE CMAKE_HOST_SYSTEM_PROCESSOR
RESULT_VARIABLE val
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
endif()
endif()
# check the return of the last uname -m or -p
if("${val}" GREATER 0)
set(CMAKE_HOST_SYSTEM_PROCESSOR "unknown")
endif()
set(CMAKE_UNAME ${CMAKE_UNAME} CACHE INTERNAL "uname command")
# processor may have double quote in the name, and that needs to be removed
string(REPLACE "\"" "" CMAKE_HOST_SYSTEM_PROCESSOR "${CMAKE_HOST_SYSTEM_PROCESSOR}")
string(REPLACE "/" "_" CMAKE_HOST_SYSTEM_PROCESSOR "${CMAKE_HOST_SYSTEM_PROCESSOR}")
endif()
else()
if(CMAKE_HOST_WIN32)
if (DEFINED ENV{PROCESSOR_ARCHITEW6432})
set (CMAKE_HOST_SYSTEM_PROCESSOR "$ENV{PROCESSOR_ARCHITEW6432}")
else()
set (CMAKE_HOST_SYSTEM_PROCESSOR "$ENV{PROCESSOR_ARCHITECTURE}")
endif()
endif()
endif()
# if a toolchain file is used, the user wants to cross compile.
# in this case read the toolchain file and keep the CMAKE_HOST_SYSTEM_*
# variables around so they can be used in CMakeLists.txt.
# In all other cases, the host and target platform are the same.
if(CMAKE_TOOLCHAIN_FILE)
if(IS_ABSOLUTE "${CMAKE_TOOLCHAIN_FILE}" AND EXISTS "${CMAKE_TOOLCHAIN_FILE}")
# Normalize the absolute path.
set(CMAKE_TOOLCHAIN_FILE "${CMAKE_TOOLCHAIN_FILE}" CACHE FILEPATH "The CMake toolchain file" FORCE)
set(CMAKE_TOOLCHAIN_FILE "$CACHE{CMAKE_TOOLCHAIN_FILE}")
include("${CMAKE_TOOLCHAIN_FILE}" OPTIONAL RESULT_VARIABLE _INCLUDED_TOOLCHAIN_FILE)
else()
# at first try to load it as path relative to the directory from which cmake has been run
include("${CMAKE_BINARY_DIR}/${CMAKE_TOOLCHAIN_FILE}" OPTIONAL RESULT_VARIABLE _INCLUDED_TOOLCHAIN_FILE)
if(NOT _INCLUDED_TOOLCHAIN_FILE)
# if the file isn't found there, check the default locations
include("${CMAKE_TOOLCHAIN_FILE}" OPTIONAL RESULT_VARIABLE _INCLUDED_TOOLCHAIN_FILE)
endif()
if(_INCLUDED_TOOLCHAIN_FILE)
set(CMAKE_TOOLCHAIN_FILE "${_INCLUDED_TOOLCHAIN_FILE}" CACHE FILEPATH "The CMake toolchain file" FORCE)
endif()
endif()
if(NOT _INCLUDED_TOOLCHAIN_FILE)
message(FATAL_ERROR "Could not find toolchain file:\n \"${CMAKE_TOOLCHAIN_FILE}\"")
endif()
endif()
if(CMAKE_SYSTEM_NAME)
# CMAKE_SYSTEM_NAME was set by a toolchain file or on the command line.
# Assume it set CMAKE_SYSTEM_VERSION and CMAKE_SYSTEM_PROCESSOR too.
if(NOT DEFINED CMAKE_CROSSCOMPILING)
set(CMAKE_CROSSCOMPILING TRUE)
endif()
elseif(CMAKE_VS_WINCE_VERSION)
set(CMAKE_SYSTEM_NAME "WindowsCE")
set(CMAKE_SYSTEM_VERSION "${CMAKE_VS_WINCE_VERSION}")
set(CMAKE_SYSTEM_PROCESSOR "${MSVC_C_ARCHITECTURE_ID}")
set(CMAKE_CROSSCOMPILING TRUE)
else()
# Build for the host platform and architecture by default.
set(CMAKE_SYSTEM_NAME "${CMAKE_HOST_SYSTEM_NAME}")
if(NOT DEFINED CMAKE_SYSTEM_VERSION)
set(CMAKE_SYSTEM_VERSION "${CMAKE_HOST_SYSTEM_VERSION}")
endif()
set(CMAKE_SYSTEM_PROCESSOR "${CMAKE_HOST_SYSTEM_PROCESSOR}")
if(CMAKE_CROSSCOMPILING)
message(AUTHOR_WARNING
"CMAKE_CROSSCOMPILING has been set by the project, toolchain file, or user. "
"CMake is resetting it to false because CMAKE_SYSTEM_NAME was not set. "
"To indicate cross compilation, only CMAKE_SYSTEM_NAME needs to be set."
)
endif()
set(CMAKE_CROSSCOMPILING FALSE)
endif()
include(Platform/${CMAKE_SYSTEM_NAME}-Determine OPTIONAL)
set(CMAKE_SYSTEM ${CMAKE_SYSTEM_NAME})
if(CMAKE_SYSTEM_VERSION)
string(APPEND CMAKE_SYSTEM -${CMAKE_SYSTEM_VERSION})
endif()
set(CMAKE_HOST_SYSTEM ${CMAKE_HOST_SYSTEM_NAME})
if(CMAKE_HOST_SYSTEM_VERSION)
string(APPEND CMAKE_HOST_SYSTEM -${CMAKE_HOST_SYSTEM_VERSION})
endif()
# this file is also executed from cpack, then we don't need to generate these files
# in this case there is no CMAKE_BINARY_DIR
if(CMAKE_BINARY_DIR)
# write entry to the log file
if(CMAKE_CROSSCOMPILING)
message(CONFIGURE_LOG
"The target system is: ${CMAKE_SYSTEM_NAME} - ${CMAKE_SYSTEM_VERSION} - ${CMAKE_SYSTEM_PROCESSOR}\n"
"The host system is: ${CMAKE_HOST_SYSTEM_NAME} - ${CMAKE_HOST_SYSTEM_VERSION} - ${CMAKE_HOST_SYSTEM_PROCESSOR}\n"
)
else()
message(CONFIGURE_LOG
"The system is: ${CMAKE_SYSTEM_NAME} - ${CMAKE_SYSTEM_VERSION} - ${CMAKE_SYSTEM_PROCESSOR}\n"
)
endif()
# if a toolchain file is used, it needs to be included in the configured file,
# so settings done there are also available if they don't go in the cache and in try_compile()
set(INCLUDE_CMAKE_TOOLCHAIN_FILE_IF_REQUIRED)
if(CMAKE_TOOLCHAIN_FILE)
set(INCLUDE_CMAKE_TOOLCHAIN_FILE_IF_REQUIRED "include(\"${CMAKE_TOOLCHAIN_FILE}\")")
endif()
# configure variables set in this file for fast reload, the template file is defined at the top of this file
configure_file(${CMAKE_ROOT}/Modules/CMakeSystem.cmake.in
${CMAKE_PLATFORM_INFO_DIR}/CMakeSystem.cmake
@ONLY)
endif()
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