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

[Rik]

Follow-up Comment #26, bug #61812 (project octave):

I would generally like to be able to count on M_PI, M_E and other GNU
extensions being defined.  Is there a way to do that through gnulib such that
if the OS-provided header file doesn't include the definitions then the gnulib
version which does is used?

However, if that is not possible then I think it would be nicer to define our
own constants as a fallback rather than just aborting compilation.  I'm sure
there are some weird platforms where maybe g++/gcc aren't ported and it seems
mean to try and require them to build g++ from sources.



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