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CMake 3.22 allows set/set(CACHE) to behave the same as set(X)/option(x) (#335)

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By enabling CMP0126 we tell CMake that when constructing a CACHE variable
with the same name as a local variable to not unset the local variable.

By enabling CMPO126 it makes sure that CPM behavior around `OPTION` is
consistent if the option is created with `set(CACHE)` or with `option`.
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Robert Maynard 2022-01-27 17:36:12 -05:00 committed by GitHub
parent c58e98a0a0
commit 4f7af69925
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cmake/CPM.cmake
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@ -841,6 +841,12 @@ function(
cmake_policy(SET CMP0077 NEW)
set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
# the policy allows us to change set(CACHE) without caching
if(POLICY CMP0126)
cmake_policy(SET CMP0126 NEW)
set(CMAKE_POLICY_DEFAULT_CMP0126 NEW)
endif()
foreach(OPTION ${OPTIONS})
cpm_parse_option("${OPTION}")
set(${OPTION_KEY} "${OPTION_VALUE}")