CMake/Help/policy/CMP0044.rst

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CMP0044
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Case sensitive ``<LANG>_COMPILER_ID`` generator expressions
CMake 2.8.12 introduced the ``<LANG>_COMPILER_ID``
:manual:`generator expressions <cmake-generator-expressions(7)>` to allow
comparison of the :variable:`CMAKE_<LANG>_COMPILER_ID` with a test value. The
possible valid values are lowercase, but the comparison with the test value
was performed case-insensitively.
The OLD behavior for this policy is to perform a case-insensitive comparison
with the value in the ``<LANG>_COMPILER_ID`` expression. The NEW behavior
for this policy is to perform a case-sensitive comparison with the value in
the ``<LANG>_COMPILER_ID`` expression.
This policy was introduced in CMake version 3.0.0. CMake version
|release| warns when the policy is not set and uses OLD behavior. Use
the cmake_policy command to set it to OLD or NEW explicitly.