CMP0089 | |
------- | |
.. versionadded:: 3.15 | |
Compiler id for IBM Clang-based XL compilers is now ``XLClang``. | |
CMake 3.15 and above recognize that IBM's Clang-based XL compilers | |
that define ``__ibmxl__`` are a new front-end distinct from ``xlc`` | |
with a different command line and set of capabilities. | |
CMake now prefers to present this to projects by setting the | |
:variable:`CMAKE_<LANG>_COMPILER_ID` variable to ``XLClang`` instead | |
of ``XL``. However, existing projects may assume the compiler id for | |
Clang-based XL is just ``XL`` as it was in CMake versions prior to 3.15. | |
Therefore this policy determines for Clang-based XL compilers which | |
compiler id to report in the :variable:`CMAKE_<LANG>_COMPILER_ID` | |
variable after language ``<LANG>`` is enabled by the :command:`project` | |
or :command:`enable_language` command. The policy must be set prior | |
to the invocation of either command. | |
The ``OLD`` behavior for this policy is to use compiler id ``XL``. The | |
``NEW`` behavior for this policy is to use compiler id ``XLClang``. | |
This policy was introduced in CMake version 3.15. Use the | |
:command:`cmake_policy` command to set this policy to ``OLD`` or ``NEW`` explicitly. | |
Unlike most policies, CMake version |release| does *not* warn | |
by default when this policy is not set and simply uses ``OLD`` behavior. | |
See documentation of the | |
:variable:`CMAKE_POLICY_WARNING_CMP0089 <CMAKE_POLICY_WARNING_CMP<NNNN>>` | |
variable to control the warning. | |
.. include:: DEPRECATED.txt |