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9.89 unistd.h ¶

POSIX specification:
https://pubs.opengroup.org/onlinepubs/9799919799/basedefs/unistd.h.html

Gnulib module: unistd-h

Portability problems fixed by Gnulib:

• This header file is missing on some platforms: MSVC 14.
• The type off64_t is not defined on some platforms: macOS 14, FreeBSD 10.4, NetBSD 10.0, OpenBSD 7.5, MSVC 14, Cygwin, Haiku, Minix 3.3.
• The SEEK_* macros are not defined in this file on some platforms: mingw.
• The *_FILENO macros are not defined in this file on some platforms: OS/2 EMX, mingw.
• The _exit function is not declared in this file on some platforms: mingw.
• This header file does not define O_CLOEXEC on some platforms: glibc 2.41, macOS 12, FreeBSD 14.0, NetBSD 10.0, OpenBSD 7.5, AIX 7.3, Solaris 11.4, Cygwin 3.5, mingw.
• Some platforms provide a NULL macro that cannot be used in arbitrary expressions: NetBSD 5.0

Portability problems not fixed by Gnulib: