sys/types.h (GNU Gnulib)

Gnulib module: sys_types-h

Portability problems fixed by Gnulib:

The type pid_t is not defined on some platforms: MSVC 14.
The type size_t is not defined in this file on some platforms: MSVC 14.
The type ssize_t is not defined on some platforms: MSVC 14.
The type mode_t is not defined 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 type blksize_t is not defined on some platforms: FreeBSD 5.5, OpenBSD 5.6, HP-UX 11.23, IRIX 6.5, mingw, MSVC 14.
The type blkcnt_t is not defined on some platforms: FreeBSD 5.5, OpenBSD 5.6, mingw, MSVC 14.
Some systems leak definitions of major, minor, and makedev through this header; however, when sys/sysmacros.h exists, that file should also be included to avoid deprecation warnings from the versions in this header: glibc 2.25.

See Avoiding the year 2038 problem, for portability issues with time_t.

Portability problems not fixed by Gnulib:

On some platforms the types blksize_t and blkcnt_t are unsigned: Android.
On some platforms the types blksize_t and suseconds_t are signed integer types that are wider than long: glibc x32

This module, together with the module largefile, also defines the type off_t to a 64-bit integer type on some platforms: mingw, MSVC 14.