Gnulib module: wctype-h
Portability problems fixed by Gnulib:
Portability problems not fixed by Gnulib:
wchar_tis a 16-bit type and therefore cannot accommodate all Unicode characters. However, the Gnulib function
c32isupper, provided by Gnulib module
c32isupper, operates on 32-bit wide characters and therefore does not have this limitation.