rm5248 commented on PR #345:
URL: https://github.com/apache/logging-log4cxx/pull/345#issuecomment-1927159573

   Unfortunately since this is a C++20 only fix, that build would fail with 
earlier versions.
   
   The optional GCC fix as well (`##__VA_ARGS__`) only works if GNU extensions 
are enabled.  So it works if you compile with `-std=gnu++11` but fails with 
`-std=c++11`.  There doesn't seem to be a way to test if this is enabled or not 
at compile time.


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