@node posix_memalign @section @code{posix_memalign} @findex posix_memalign POSIX specification:@* @url{https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_memalign.html} Gnulib module: posix_memalign Portability problems fixed by Gnulib: @itemize @item This function produces misaligned results on some platforms: OpenBSD 6.1. @end itemize Portability problems not fixed by Gnulib: @itemize @item This function is missing on some platforms: Mac OS X 10.5, FreeBSD 6.0, NetBSD 3.0, OpenBSD 3.8, Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 10, Cygwin 1.5.x, mingw, MSVC 14, Android 4.1. @end itemize The Gnulib module @code{aligned-malloc} provides functions for allocating and freeing blocks of suitably aligned memory. The Gnulib module @code{pagealign_alloc} provides a similar API for allocating and freeing blocks of memory aligned on a system page boundary.