If backslashes are used for CMAKE_GENERATOR_TOOLSET, then ctest
processing will complain about COMP0010.
For example:
Syntax error in cmake code at
C:/Users/XXX/test_bld/Tests/CTestTestfile.cmake:253
when parsing string
C:\Users\XXX\bin_tools\XXX
Invalid escape sequence \U
Policy CMP0010 is not set: Bad variable reference syntax is an error. Run
"cmake --help-policy CMP0010" for policy details. Use the cmake_policy
command to set the policy and suppress this warning.
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