diff options
| -rw-r--r-- | Help/variable/CMAKE_SYSTEM_VERSION.rst | 7 | ||||
| -rw-r--r-- | Modules/CMakeDetermineSystem.cmake | 4 |
2 files changed, 10 insertions, 1 deletions
diff --git a/Help/variable/CMAKE_SYSTEM_VERSION.rst b/Help/variable/CMAKE_SYSTEM_VERSION.rst index f388ccf..aba8ca3 100644 --- a/Help/variable/CMAKE_SYSTEM_VERSION.rst +++ b/Help/variable/CMAKE_SYSTEM_VERSION.rst @@ -12,6 +12,13 @@ then ``CMAKE_SYSTEM_VERSION`` is by default set to the same value as the :variable:`CMAKE_HOST_SYSTEM_VERSION` variable so that the build targets the host system version. +In the case of a host build then ``CMAKE_SYSTEM_VERSION`` may be set +explicitly when first configuring a new build tree in order to enable +targeting the build for a different version of the host operating system +than is actually running on the host. This is allowed and not considered +cross compiling so long as the binaries built for the specified OS version +can still run on the host. + System Version for Cross Compiling ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ diff --git a/Modules/CMakeDetermineSystem.cmake b/Modules/CMakeDetermineSystem.cmake index fa14641..d9f7579 100644 --- a/Modules/CMakeDetermineSystem.cmake +++ b/Modules/CMakeDetermineSystem.cmake @@ -123,7 +123,9 @@ elseif(CMAKE_VS_WINCE_VERSION) set(PRESET_CMAKE_SYSTEM_NAME TRUE) else() set(CMAKE_SYSTEM_NAME "${CMAKE_HOST_SYSTEM_NAME}") - set(CMAKE_SYSTEM_VERSION "${CMAKE_HOST_SYSTEM_VERSION}") + if(NOT DEFINED CMAKE_SYSTEM_VERSION) + set(CMAKE_SYSTEM_VERSION "${CMAKE_HOST_SYSTEM_VERSION}") + endif() set(CMAKE_SYSTEM_PROCESSOR "${CMAKE_HOST_SYSTEM_PROCESSOR}") set(CMAKE_CROSSCOMPILING FALSE) set(PRESET_CMAKE_SYSTEM_NAME FALSE) |