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SERVER-82285 Set ASIO_HAS_STD_INVOKE_RESULT is compiling with C++20 #1576

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SERVER-82285 Set ASIO_HAS_STD_INVOKE_RESULT is compiling with C++20 #1576

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Expand Up @@ -3868,6 +3868,9 @@ def doConfigure(myenv):
if get_option('cxx-std') == "20" and not conf.CheckCxx20():
myenv.ConfError('C++20 support is required to build MongoDB')

if get_option('cxx-std') == "20" and conf.CheckCxx20():
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@dmoody256 dmoody256 Mar 13, 2024

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c++20 is currently the only viable option, so theres not much reason to put this define under this condition. Also this condition is isolated to exactly c++20 and so its not forward compatible. So it should just be unconditionally added after the c++20 check above.

# ASIO will use std::result_of which was removed in c++20
# force it to use the newer alternative std::invoke_result
myenv.Append(CPPDEFINES=["ASIO_HAS_STD_INVOKE_RESULT"])

myenv.Append(CPPDEFINES=["ASIO_HAS_STD_INVOKE_RESULT"])

conf.Finish()

# C11 memset_s - a secure memset
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