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8.2 bool

Gnulib module: stdbool

Portability problems fixed by Gnulib:

• The keywords bool, true, and false are not available: gcc 12 and other compilers predating C23.

Portability problems not fixed by Gnulib:

• On pre-C23 platforms, the keyword substitutes are macros.
• On pre-C23 platforms, the keyword substitutes assume C99 or later.