[Octave-bug-tracker] [bug #61812] Math constants (e.g. M_PI) are not part of C/C++ standard

[A.R. Burgers]

Follow-up Comment #36, bug #61812 (project octave):

I think the issue might be that after the patch with a compiler supporting
c++17 with --enable-std-pmr-polymorphic-allocator an explicit -std=gnu++17 is
supplied to the compiler, and with --disable-std-pmr-polymorphic-allocator an
explicit -std=gnu+11 (disabling std::variant), whereas before this patch I
suspect the -std option was not specified (and is default c++17 for gcc 11.2,
allowing std::variant to be used).

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