# getpagesize.m4 serial 10

dnl Copyright (C) 2002, 2004-2005, 2007, 2009-2020 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])

  gl_CHECK_FUNC_GETPAGESIZE

  if test $gl_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

      ;;

  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])

])

dnl Tests whether the function getpagesize() exists.

dnl Sets gl_cv_func_getpagesize.

AC_DEFUN([gl_CHECK_FUNC_GETPAGESIZE],

[

  dnl We can't use AC_CHECK_FUNC here, because getpagesize() is defined as a

  dnl static inline function when compiling for Android 4.4 or older.

  AC_CACHE_CHECK([for getpagesize], [gl_cv_func_getpagesize],

    [AC_LINK_IFELSE(

       [AC_LANG_PROGRAM(

          [[#include <unistd.h>]],

          [[return getpagesize();]])

       ],

       [gl_cv_func_getpagesize=yes],

       [gl_cv_func_getpagesize=no])

    ])

])