1 # sys_random_h.m4 serial 5
2 dnl Copyright (C) 2020 Free Software Foundation, Inc.
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.
7 AC_DEFUN([gl_HEADER_SYS_RANDOM],
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
17 AC_SUBST([HAVE_SYS_RANDOM_H])
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
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([[
28 /* Additional includes are needed before <sys/random.h> on uClibc
30 # include <sys/types.h>
32 # include <sys/random.h>
38 AC_DEFUN([gl_SYS_RANDOM_MODULE_INDICATOR],
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])
47 AC_DEFUN([gl_SYS_RANDOM_H_DEFAULTS],
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])