copy memory area NAME mempcpy, wmempcpy - copy memory area LIBRARY Standard C library ( libc , -lc ) SYNOPSIS #define _GNU_SOURCE...copy memory area NAME mempcpy, wmempcpy - copy memory area LIBRARY Standard C library ( libc , -lc ) SYNOPSIS #define _GNU_SOURCE......, POSIX.1-2008. HISTORY POSIX.1-2001, C99. SEE ALSO memcpy (3), wcscpy (3), wmemmove (3), wmempcpy (3)