make sure __cplusplus is defined under msvc
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@ -30,6 +30,11 @@ if(NOT CMAKE_CXX_STANDARD)
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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endif()
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endif()
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# make sure __cplusplus is defined under msvc
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if(MSVC)
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string(APPEND CMAKE_CXX_FLAGS " /Zc:__cplusplus")
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endif()
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set(CMAKE_CXX_EXTENSIONS OFF)
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set(CMAKE_CXX_EXTENSIONS OFF)
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if(CMAKE_SYSTEM_NAME MATCHES "CYGWIN" OR CMAKE_SYSTEM_NAME MATCHES "MSYS")
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if(CMAKE_SYSTEM_NAME MATCHES "CYGWIN" OR CMAKE_SYSTEM_NAME MATCHES "MSYS")
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