2 dnl Copyright (C) 2005-2007, 2009-2011 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_PAGEALIGN_ALLOC],
9 dnl Persuade glibc <sys/mman.h> to define MAP_ANONYMOUS.
10 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
12 AC_LIBOBJ([pagealign_alloc])
13 gl_PREREQ_PAGEALIGN_ALLOC
16 # Prerequisites of lib/pagealign_alloc.c.
17 AC_DEFUN([gl_PREREQ_PAGEALIGN_ALLOC],
19 AC_REQUIRE([gl_FUNC_MMAP_ANON])
20 AC_CHECK_FUNCS_ONCE([posix_memalign])
21 AC_CHECK_HEADERS_ONCE([unistd.h])