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CMake - set C++17 as the minimum required version (34676a567)
Currently IfcOpenShell doesn't compile for C++14 (it stumbles upon `invoke_result_t` in XmlSerializer.cpp) and I'm not sure if it's needed.
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@@ -18,6 +18,12 @@
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################################################################################
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cmake_minimum_required(VERSION 3.21)
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if (NOT DEFINED CMAKE_CXX_STANDARD)
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set(CMAKE_CXX_STANDARD 17)
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endif()
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if (CMAKE_CXX_STANDARD LESS 17)
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message(FATAL_ERROR "C++17 or newer is required.")
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endif()
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set(CMAKE_CXX_STANDARD_REQUIRED ON) # not necessary, but encouraged
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set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
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