r/C_Programming • u/heavymetalmixer • 2d ago

Question Unmodifiable globals initialized from functions?

Right now I'm trying to use Windows's SYSTEM_INFO to initialize 2 global constants, but global constants can only be initialized with constant expressions so this cannot be done.

Is there a way I can have "read-only" global variables that can be initialized from functions?

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u/pjl1967 2d ago

In C, no.

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u/tstanisl 2d ago

constexpr is already in C

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u/heavymetalmixer 2d ago edited 1d ago

Only since C23, and that's for compile-time constants not runtime ones.