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CMake/Modules/CMakeDetermineSystem.cmake at master · Kitware/CMake · GitHub
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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
NO_CMAKE_FIND_ROOT_PATH
)
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
RESULT_VARIABLE
_uname_result
)
execute_process
(
COMMAND
${CMAKE_UNAME}
-r
OUTPUT_VARIABLE
_CMAKE_HOST_SYSTEM_MINOR_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET
RESULT_VARIABLE
_uname_result2
)
if
(_uname_result
EQUAL
0
AND
_uname_result2
EQUAL
0)
set
(
CMAKE_HOST_SYSTEM_VERSION
"
${_CMAKE_HOST_SYSTEM_MAJOR_VERSION}
.
${_CMAKE_HOST_SYSTEM_MINOR_VERSION}
"
)
endif
()
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
RESULT_VARIABLE
_uname_result
)
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
${CMAKE_UNAME}
-r
OUTPUT_VARIABLE
CMAKE_HOST_SYSTEM_VERSION
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET
RESULT_VARIABLE
_uname_result
)
endif
()
if
(
CMAKE_HOST_SYSTEM_NAME
MATCHES
"Linux|CYGWIN.*|MSYS.*|^GNU$|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
)
#
Retain input value to detect changes requiring re-configuration.
set
(_CMAKE_INPUT_TOOLCHAIN_FILE
"
${
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
)
string
(CONCAT INCLUDE_CMAKE_TOOLCHAIN_FILE_IF_REQUIRED
"set(_CMAKE_INPUT_TOOLCHAIN_FILE [==[
${_CMAKE_INPUT_TOOLCHAIN_FILE}
]==])
\n
"
"set(_CMAKE_SYSTEM_TOOLCHAIN_FILE
\"
${
CMAKE_TOOLCHAIN_FILE
}
\"
)
\n
"
"include(
\"\$
{_CMAKE_SYSTEM_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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