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7a6dbc2f SDJ |
1 | # getpagesize.m4 serial 10 |
2 | dnl Copyright (C) 2002, 2004-2005, 2007, 2009-2018 Free Software Foundation, | |
3 | dnl Inc. | |
4 | dnl This file is free software; the Free Software Foundation | |
5 | dnl gives unlimited permission to copy and/or distribute it, | |
6 | dnl with or without modifications, as long as this notice is preserved. | |
7 | ||
8 | AC_DEFUN([gl_FUNC_GETPAGESIZE], | |
9 | [ | |
10 | AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) | |
11 | AC_REQUIRE([AC_CANONICAL_HOST]) | |
12 | gl_CHECK_FUNC_GETPAGESIZE | |
13 | if test $gl_cv_func_getpagesize = no; then | |
14 | HAVE_GETPAGESIZE=0 | |
15 | AC_CHECK_HEADERS([OS.h]) | |
16 | if test $ac_cv_header_OS_h = yes; then | |
17 | HAVE_OS_H=1 | |
18 | fi | |
19 | AC_CHECK_HEADERS([sys/param.h]) | |
20 | if test $ac_cv_header_sys_param_h = yes; then | |
21 | HAVE_SYS_PARAM_H=1 | |
22 | fi | |
23 | fi | |
24 | case "$host_os" in | |
25 | mingw*) | |
26 | REPLACE_GETPAGESIZE=1 | |
27 | ;; | |
28 | esac | |
29 | dnl Also check whether it's declared. | |
30 | dnl mingw has getpagesize() in libgcc.a but doesn't declare it. | |
31 | AC_CHECK_DECL([getpagesize], , [HAVE_DECL_GETPAGESIZE=0]) | |
32 | ]) | |
33 | ||
34 | dnl Tests whether the function getpagesize() exists. | |
35 | dnl Sets gl_cv_func_getpagesize. | |
36 | AC_DEFUN([gl_CHECK_FUNC_GETPAGESIZE], | |
37 | [ | |
38 | dnl We can't use AC_CHECK_FUNC here, because getpagesize() is defined as a | |
39 | dnl static inline function when compiling for Android 4.4 or older. | |
40 | AC_CACHE_CHECK([for getpagesize], [gl_cv_func_getpagesize], | |
41 | [AC_LINK_IFELSE( | |
42 | [AC_LANG_PROGRAM( | |
43 | [[#include <unistd.h>]], | |
44 | [[return getpagesize();]]) | |
45 | ], | |
46 | [gl_cv_func_getpagesize=yes], | |
47 | [gl_cv_func_getpagesize=no]) | |
48 | ]) | |
49 | ]) |