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dc6c21da TT |
1 | # sys_random_h.m4 serial 8 |
2 | dnl Copyright (C) 2020-2022 Free Software Foundation, Inc. | |
698be2d8 CB |
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. | |
6 | ||
dc6c21da | 7 | AC_DEFUN_ONCE([gl_SYS_RANDOM_H], |
698be2d8 CB |
8 | [ |
9 | AC_REQUIRE([gl_SYS_RANDOM_H_DEFAULTS]) | |
10 | dnl <sys/random.h> is always overridden, because of GNULIB_POSIXCHECK. | |
11 | gl_CHECK_NEXT_HEADERS([sys/random.h]) | |
12 | if test $ac_cv_header_sys_random_h = yes; then | |
13 | HAVE_SYS_RANDOM_H=1 | |
14 | else | |
15 | HAVE_SYS_RANDOM_H=0 | |
16 | fi | |
17 | AC_SUBST([HAVE_SYS_RANDOM_H]) | |
18 | ||
19 | m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])]) | |
20 | if test $ac_cv_header_sys_random_h = yes; then | |
21 | UNISTD_H_HAVE_SYS_RANDOM_H=1 | |
22 | fi | |
23 | ||
24 | dnl Check for declarations of anything we want to poison if the | |
25 | dnl corresponding gnulib module is not in use. | |
26 | gl_WARN_ON_USE_PREPARE([[ | |
27 | #if HAVE_SYS_RANDOM_H | |
9c9d63b1 PM |
28 | /* Additional includes are needed before <sys/random.h> on uClibc |
29 | and Mac OS X. */ | |
698be2d8 CB |
30 | # include <sys/types.h> |
31 | # include <stdlib.h> | |
32 | # include <sys/random.h> | |
33 | #endif | |
34 | ]], | |
35 | [getrandom]) | |
36 | ]) | |
37 | ||
dc6c21da TT |
38 | # gl_SYS_RANDOM_MODULE_INDICATOR([modulename]) |
39 | # sets the shell variable that indicates the presence of the given module | |
40 | # to a C preprocessor expression that will evaluate to 1. | |
41 | # This macro invocation must not occur in macros that are AC_REQUIREd. | |
698be2d8 CB |
42 | AC_DEFUN([gl_SYS_RANDOM_MODULE_INDICATOR], |
43 | [ | |
dc6c21da TT |
44 | dnl Ensure to expand the default settings once only. |
45 | gl_SYS_RANDOM_H_REQUIRE_DEFAULTS | |
698be2d8 CB |
46 | gl_MODULE_INDICATOR_SET_VARIABLE([$1]) |
47 | dnl Define it also as a C macro, for the benefit of the unit tests. | |
48 | gl_MODULE_INDICATOR_FOR_TESTS([$1]) | |
49 | ]) | |
50 | ||
dc6c21da TT |
51 | # Initializes the default values for AC_SUBSTed shell variables. |
52 | # This macro must not be AC_REQUIREd. It must only be invoked, and only | |
53 | # outside of macros or in macros that are not AC_REQUIREd. | |
54 | AC_DEFUN([gl_SYS_RANDOM_H_REQUIRE_DEFAULTS], | |
55 | [ | |
56 | m4_defun(GL_MODULE_INDICATOR_PREFIX[_SYS_RANDOM_H_MODULE_INDICATOR_DEFAULTS], [ | |
57 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_GETRANDOM]) | |
58 | ]) | |
59 | m4_require(GL_MODULE_INDICATOR_PREFIX[_SYS_RANDOM_H_MODULE_INDICATOR_DEFAULTS]) | |
60 | AC_REQUIRE([gl_SYS_RANDOM_H_DEFAULTS]) | |
61 | ]) | |
62 | ||
698be2d8 CB |
63 | AC_DEFUN([gl_SYS_RANDOM_H_DEFAULTS], |
64 | [ | |
698be2d8 CB |
65 | dnl Assume proper GNU behavior unless another module says otherwise. |
66 | HAVE_GETRANDOM=1; AC_SUBST([HAVE_GETRANDOM]) | |
67 | REPLACE_GETRANDOM=0; AC_SUBST([REPLACE_GETRANDOM]) | |
68 | ]) |