"Fossies" - the Fresh Open Source Software archive 
Member "tar-1.26/m4/getpagesize.m4" of archive tar-1.26.tar.gz:
# getpagesize.m4 serial 8
dnl Copyright (C) 2002, 2004-2005, 2007, 2009-2011 Free Software Foundation,
dnl Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_GETPAGESIZE],
[
AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
AC_REQUIRE([AC_CANONICAL_HOST])
AC_CHECK_FUNCS([getpagesize])
if test $ac_cv_func_getpagesize = no; then
HAVE_GETPAGESIZE=0
AC_CHECK_HEADERS([OS.h])
if test $ac_cv_header_OS_h = yes; then
HAVE_OS_H=1
fi
AC_CHECK_HEADERS([sys/param.h])
if test $ac_cv_header_sys_param_h = yes; then
HAVE_SYS_PARAM_H=1
fi
fi
case "$host_os" in
mingw*)
REPLACE_GETPAGESIZE=1
AC_LIBOBJ([getpagesize])
;;
esac
dnl Also check whether it's declared.
dnl mingw has getpagesize() in libgcc.a but doesn't declare it.
AC_CHECK_DECL([getpagesize], , [HAVE_DECL_GETPAGESIZE=0])
])