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# sys_random_h.m4 serial 5
dnl Copyright (C) 2020-2021 Free Software Foundation, 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_HEADER_SYS_RANDOM],
[
AC_REQUIRE([gl_SYS_RANDOM_H_DEFAULTS])
dnl <sys/random.h> is always overridden, because of GNULIB_POSIXCHECK.
gl_CHECK_NEXT_HEADERS([sys/random.h])
if test $ac_cv_header_sys_random_h = yes; then
HAVE_SYS_RANDOM_H=1
else
HAVE_SYS_RANDOM_H=0
fi
AC_SUBST([HAVE_SYS_RANDOM_H])
m4_ifdef([gl_UNISTD_H_DEFAULTS], [AC_REQUIRE([gl_UNISTD_H_DEFAULTS])])
if test $ac_cv_header_sys_random_h = yes; then
UNISTD_H_HAVE_SYS_RANDOM_H=1
fi
dnl Check for declarations of anything we want to poison if the
dnl corresponding gnulib module is not in use.
gl_WARN_ON_USE_PREPARE([[
#if HAVE_SYS_RANDOM_H
/* Additional includes are needed before <sys/random.h> on uClibc
and Mac OS X. */
# include <sys/types.h>
# include <stdlib.h>
# include <sys/random.h>
#endif
]],
[getrandom])
])
AC_DEFUN([gl_SYS_RANDOM_MODULE_INDICATOR],
[
dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
AC_REQUIRE([gl_SYS_RANDOM_H_DEFAULTS])
gl_MODULE_INDICATOR_SET_VARIABLE([$1])
dnl Define it also as a C macro, for the benefit of the unit tests.
gl_MODULE_INDICATOR_FOR_TESTS([$1])
])
AC_DEFUN([gl_SYS_RANDOM_H_DEFAULTS],
[
GNULIB_GETRANDOM=0; AC_SUBST([GNULIB_GETRANDOM])
dnl Assume proper GNU behavior unless another module says otherwise.
HAVE_GETRANDOM=1; AC_SUBST([HAVE_GETRANDOM])
REPLACE_GETRANDOM=0; AC_SUBST([REPLACE_GETRANDOM])
])
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