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10.1091 stdc_bit_width

Documentation:
ISO C23 (latest free draft http://www.open-std.org/jtc1/sc22/wg14/www/docs/n3096.pdf) section 7.18.14.

Gnulib module: stdc_bit_width

Portability problems fixed by Gnulib:

• This macro is missing on many platforms: glibc 2.38, macOS 14, FreeBSD 14.0, NetBSD 10.0, OpenBSD 7.5, AIX 7.3.1, HP-UX 11.31, Solaris 11.4, Cygwin 3.5.3, mingw, MSVC 17, Android 15.

Portability problems not fixed by Gnulib: