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10.9 _tolower

Removed in POSIX.1-2024. POSIX.1-2017 specification:
https://pubs.opengroup.org/onlinepubs/9699919799/functions/_tolower.html

Gnulib module: —

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

• This function is missing on some platforms: macOS 14, Minix 3.1.8, Android 4.4.
• This function is removed in POSIX.1-2024. Use the function tolower instead.