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# the "option()" defined by CMake represents a boolean. but somtimes, we want
# to enable/disable it depending on the CMAKE_BUILD_TYPE, if user leaves the
# option unset.
function (tri_state_option option)
cmake_parse_arguments (
parsed_args
""
"CONDITION"
"DEFAULT_BUILD_TYPES"
${ARGN})
get_property(is_multi_config GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)
if (is_multi_config)
set (all_build_types ${CMAKE_CONFIGURATION_TYPES})
else ()
set (all_build_types ${CMAKE_BUILD_TYPE})
endif ()
# generic boolean values passed as string, potentially from configure.py
set (True_STRING_VALUES "ON" "yes" "Yes" "YES" "true" "True" "TRUE")
set (Default_STRING_VALUES "DEFAULT" "default" "Default")
if ("${option}" IN_LIST True_STRING_VALUES)
set (enabled_types ${all_build_types})
elseif ("${option}" IN_LIST Default_STRING_VALUES)
set (enabled_types ${parsed_args_DEFAULT_BUILD_TYPES})
else ()
set (enabled_types "")
endif ()
if (is_multi_config)
set (${parsed_args_CONDITION} "$<IN_LIST:$<CONFIG>,${enabled_types}>" PARENT_SCOPE)
elseif (CMAKE_BUILD_TYPE IN_LIST enabled_types)
set (${parsed_args_CONDITION} 1 PARENT_SCOPE)
else ()
set (${parsed_args_CONDITION} 0 PARENT_SCOPE)
endif ()
endfunction ()
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