gettimeofday (GNU Gnulib)

Gnulib module: gettimeofday

Portability problems fixed by Gnulib:

This function is missing on some platforms: MSVC 14.
This function is declared with a nonstandard function prototype (only one argument, or “...” after the first argument) on some platforms.
On some platforms, the second argument has type struct timezone* rather than void *, making it an error to redeclare the function with the POSIX signature: glibc. However, rather than penalize these systems with a replacement function, gnulib defines GETTIMEOFDAY_TIMEZONE to the appropriate type for use in avoiding a compiler warning if assigning gettimeofday to a function pointer.
This function has only a precision of 15.6 milliseconds on some platforms: mingw.

Portability problems not fixed by Gnulib:

Behavior is non-portable if the second argument to gettimeofday is not NULL.
This function is removed in POSIX.1-2024. Use the Gnulib module gettime or timespec_get instead. (POSIX recommends to use the function clock_gettime, but there is no corresponding Gnulib module for it yet.)