AC_DEFUN([CHECK_PROGNAME], [ AC_CACHE_CHECK([if libc defines __progname], ac_cv_libc_defines___progname, [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[ extern char *__progname; printf("%s", __progname); ]])], [ ac_cv_libc_defines___progname="yes" ], [ ac_cv_libc_defines___progname="no" ]) ]) if test "x$ac_cv_libc_defines___progname" = "xyes" ; then AC_DEFINE([HAVE___PROGNAME], [1], [Define if libc defines __progname]) fi ]) AC_DEFUN([CHECK_SYSCALL_COMPAT], [ AC_CHECK_FUNCS([accept4 pipe2 pledge poll socketpair]) AM_CONDITIONAL([HAVE_ACCEPT4], [test "x$ac_cv_func_accept4" = xyes]) AM_CONDITIONAL([HAVE_PIPE2], [test "x$ac_cv_func_pipe2" = xyes]) AM_CONDITIONAL([HAVE_PLEDGE], [test "x$ac_cv_func_pledge" = xyes]) AM_CONDITIONAL([HAVE_POLL], [test "x$ac_cv_func_poll" = xyes]) AM_CONDITIONAL([HAVE_SOCKETPAIR], [test "x$ac_cv_func_socketpair" = xyes]) ]) AC_DEFUN([CHECK_B64_NTOP], [ AC_SEARCH_LIBS([b64_ntop],[resolv]) AC_SEARCH_LIBS([__b64_ntop],[resolv]) AC_CACHE_CHECK([for b64_ntop], ac_cv_have_b64_ntop_arg, [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include #include #include #include #include ]], [[ b64_ntop(NULL, 0, NULL, 0); ]])], [ ac_cv_have_b64_ntop_arg="yes" ], [ ac_cv_have_b64_ntop_arg="no" ]) ]) AM_CONDITIONAL([HAVE_B64_NTOP], [test "x$ac_cv_func_b64_ntop_arg" = xyes]) ]) AC_DEFUN([CHECK_CRYPTO_COMPAT], [ # Check crypto-related libc functions and syscalls AC_CHECK_FUNCS([arc4random arc4random_buf arc4random_uniform]) AC_CHECK_FUNCS([explicit_bzero getauxval]) AC_CACHE_CHECK([for getentropy], ac_cv_func_getentropy, [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include #include /* * Explanation: * * - iOS <= 10.1 fails because of missing sys/random.h * * - in macOS 10.12 getentropy is not tagged as introduced in * 10.12 so we cannot use it for target < 10.12 */ #ifdef __APPLE__ # include # include # if (TARGET_OS_IPHONE || TARGET_OS_SIMULATOR) # include /* Not available as of iOS <= 10.1 */ # else # include /* Pre 10.12 systems should die here */ /* Based on: https://gitweb.torproject.org/tor.git/commit/?id=16fcbd21 */ # ifndef MAC_OS_X_VERSION_10_12 # define MAC_OS_X_VERSION_10_12 101200 /* Robustness */ # endif # if defined(MAC_OS_X_VERSION_MIN_REQUIRED) # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12 # error "Targeting on Mac OSX 10.11 or earlier" # endif # endif # endif #endif /* __APPLE__ */ ]], [[ char buffer; (void)getentropy(&buffer, sizeof (buffer)); ]])], [ ac_cv_func_getentropy="yes" ], [ ac_cv_func_getentropy="no" ]) ]) AC_CHECK_FUNCS([timingsafe_bcmp timingsafe_memcmp]) AM_CONDITIONAL([HAVE_ARC4RANDOM], [test "x$ac_cv_func_arc4random" = xyes]) AM_CONDITIONAL([HAVE_ARC4RANDOM_BUF], [test "x$ac_cv_func_arc4random_buf" = xyes]) AM_CONDITIONAL([HAVE_ARC4RANDOM_UNIFORM], [test "x$ac_cv_func_arc4random_uniform" = xyes]) AM_CONDITIONAL([HAVE_EXPLICIT_BZERO], [test "x$ac_cv_func_explicit_bzero" = xyes]) AM_CONDITIONAL([HAVE_GETENTROPY], [test "x$ac_cv_func_getentropy" = xyes]) AM_CONDITIONAL([HAVE_TIMINGSAFE_BCMP], [test "x$ac_cv_func_timingsafe_bcmp" = xyes]) AM_CONDITIONAL([HAVE_TIMINGSAFE_MEMCMP], [test "x$ac_cv_func_timingsafe_memcmp" = xyes]) # Override arc4random_buf implementations with known issues AM_CONDITIONAL([HAVE_ARC4RANDOM_BUF], [test "x$USE_BUILTIN_ARC4RANDOM" != xyes \ -a "x$ac_cv_func_arc4random_buf" = xyes]) # Check for getentropy fallback dependencies AC_CHECK_FUNC([getauxval]) AC_SEARCH_LIBS([clock_gettime],[rt posix4]) AC_CHECK_FUNC([clock_gettime]) AC_SEARCH_LIBS([dl_iterate_phdr],[dl]) AC_CHECK_FUNC([dl_iterate_phdr]) ]) AC_DEFUN([CHECK_VA_COPY], [ AC_CACHE_CHECK([whether va_copy exists], ac_cv_have_va_copy, [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include va_list x,y; ]], [[ va_copy(x,y); ]])], [ ac_cv_have_va_copy="yes" ], [ ac_cv_have_va_copy="no" ]) ]) if test "x$ac_cv_have_va_copy" = "xyes" ; then AC_DEFINE([HAVE_VA_COPY], [1], [Define if va_copy exists]) fi AC_CACHE_CHECK([whether __va_copy exists], ac_cv_have___va_copy, [ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include va_list x,y; ]], [[ __va_copy(x,y); ]])], [ ac_cv_have___va_copy="yes" ], [ ac_cv_have___va_copy="no" ]) ]) if test "x$ac_cv_have___va_copy" = "xyes" ; then AC_DEFINE([HAVE___VA_COPY], [1], [Define if __va_copy exists]) fi ])