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9c9d63b1 PM |
1 | # sys_random_h.m4 serial 5 |
2 | dnl Copyright (C) 2020-2021 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 | ||
7 | AC_DEFUN([gl_HEADER_SYS_RANDOM], | |
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 | ||
38 | AC_DEFUN([gl_SYS_RANDOM_MODULE_INDICATOR], | |
39 | [ | |
40 | dnl Use AC_REQUIRE here, so that the default settings are expanded once only. | |
41 | AC_REQUIRE([gl_SYS_RANDOM_H_DEFAULTS]) | |
42 | gl_MODULE_INDICATOR_SET_VARIABLE([$1]) | |
43 | dnl Define it also as a C macro, for the benefit of the unit tests. | |
44 | gl_MODULE_INDICATOR_FOR_TESTS([$1]) | |
45 | ]) | |
46 | ||
47 | AC_DEFUN([gl_SYS_RANDOM_H_DEFAULTS], | |
48 | [ | |
49 | GNULIB_GETRANDOM=0; AC_SUBST([GNULIB_GETRANDOM]) | |
50 | dnl Assume proper GNU behavior unless another module says otherwise. | |
51 | HAVE_GETRANDOM=1; AC_SUBST([HAVE_GETRANDOM]) | |
52 | REPLACE_GETRANDOM=0; AC_SUBST([REPLACE_GETRANDOM]) | |
53 | ]) |