mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-25 10:47:00 +00:00
69 lines
2.1 KiB
Plaintext
69 lines
2.1 KiB
Plaintext
# getrandom.m4 serial 8
|
|
dnl Copyright 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.
|
|
|
|
dnl Written by Paul Eggert.
|
|
|
|
AC_DEFUN([gl_FUNC_GETRANDOM],
|
|
[
|
|
AC_REQUIRE([gl_SYS_RANDOM_H_DEFAULTS])
|
|
AC_CHECK_FUNCS_ONCE([getrandom])
|
|
if test "$ac_cv_func_getrandom" != yes; then
|
|
HAVE_GETRANDOM=0
|
|
else
|
|
dnl On Solaris 11.4 the return type is 'int', not 'ssize_t'.
|
|
AC_CACHE_CHECK([whether getrandom is compatible with its GNU+BSD signature],
|
|
[gl_cv_func_getrandom_ok],
|
|
[AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[/* 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>
|
|
ssize_t getrandom (void *, size_t, unsigned int);
|
|
]],
|
|
[[]])
|
|
],
|
|
[gl_cv_func_getrandom_ok=yes],
|
|
[gl_cv_func_getrandom_ok=no])
|
|
])
|
|
if test $gl_cv_func_getrandom_ok = no; then
|
|
REPLACE_GETRANDOM=1
|
|
fi
|
|
fi
|
|
|
|
case "$host_os" in
|
|
mingw*)
|
|
AC_CHECK_HEADERS([bcrypt.h], [], [],
|
|
[[#include <windows.h>
|
|
]])
|
|
AC_CACHE_CHECK([whether the bcrypt library is guaranteed to be present],
|
|
[gl_cv_lib_assume_bcrypt],
|
|
[AC_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[#include <windows.h>]],
|
|
[[#if !(_WIN32_WINNT >= _WIN32_WINNT_WIN7)
|
|
cannot assume it
|
|
#endif
|
|
]])
|
|
],
|
|
[gl_cv_lib_assume_bcrypt=yes],
|
|
[gl_cv_lib_assume_bcrypt=no])
|
|
])
|
|
if test $gl_cv_lib_assume_bcrypt = yes; then
|
|
AC_DEFINE([HAVE_LIB_BCRYPT], [1],
|
|
[Define to 1 if the bcrypt library is guaranteed to be present.])
|
|
LIB_GETRANDOM='-lbcrypt'
|
|
else
|
|
LIB_GETRANDOM='-ladvapi32'
|
|
fi
|
|
;;
|
|
*)
|
|
LIB_GETRANDOM= ;;
|
|
esac
|
|
AC_SUBST([LIB_GETRANDOM])
|
|
])
|