1 dnl Copyright (c) 2001-2004, Roger Dingledine
2 dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
3 dnl Copyright (c) 2007-2019, The Tor Project, Inc.
4 dnl See LICENSE for licensing information
7 AC_INIT([tor],[0.4.5.0-alpha-dev])
8 AC_CONFIG_SRCDIR([src/app/main/tor_main.c])
9 AC_CONFIG_MACRO_DIR([m4])
13 # DO NOT EDIT THIS DEFINITION BY HAND UNLESS YOU KNOW WHAT YOU'RE DOING.
15 # The update_versions.py script updates this definition when the
16 # version number changes. Tor uses it to make sure that it
17 # only shuts down for missing "required protocols" when those protocols
18 # are listed as required by a consensus after this date.
19 AC_DEFINE(APPROX_RELEASE_DATE, ["2020-06-09"], # for 0.4.5.0-alpha-dev
20 [Approximate date when this software was released. (Updated when the version changes.)])
22 # "foreign" means we don't follow GNU package layout standards
23 # "1.11" means we require automake version 1.11 or newer
24 # "subdir-objects" means put .o files in the same directory as the .c files
25 AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
28 tor_incr_n_warnings() {
29 tor_ac_n_warnings=`expr $tor_ac_n_warnings + 1`
32 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
33 AC_CONFIG_HEADERS([orconfig.h])
35 AC_USE_SYSTEM_EXTENSIONS
39 if test "x$PKG_CONFIG" = "x" ; then
40 pkg_config_user_action="install pkg-config, and check the PKG_CONFIG_PATH environment variable"
41 AC_MSG_NOTICE([Some libraries need pkg-config, including systemd, nss, lzma, zstd, and custom mallocs.])
42 AC_MSG_NOTICE([To use those libraries, $pkg_config_user_action.])
44 pkg_config_user_action="check the PKG_CONFIG_PATH environment variable"
47 if test "x$PKG_CONFIG_PATH" = "x" && test "x$prefix" != "xNONE" && test "$host" != "$build"; then
48 export PKG_CONFIG_PATH=$prefix/lib/pkgconfig
49 AC_MSG_NOTICE([set PKG_CONFIG_PATH=$PKG_CONFIG_PATH to support cross-compiling])
52 AC_ARG_ENABLE(openbsd-malloc,
53 AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only. Deprecated: see --with-malloc]))
54 AC_ARG_ENABLE(static-openssl,
55 AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
56 AC_ARG_ENABLE(static-libevent,
57 AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
58 AC_ARG_ENABLE(static-zlib,
59 AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
60 AC_ARG_ENABLE(static-tor,
61 AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
62 AC_ARG_ENABLE(unittests,
63 AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
64 AC_ARG_ENABLE(coverage,
65 AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
66 AC_ARG_ENABLE(asserts-in-tests,
67 AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
68 AC_ARG_ENABLE(system-torrc,
69 AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
70 AC_ARG_ENABLE(libfuzzer,
71 AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
72 AC_ARG_ENABLE(oss-fuzz,
73 AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
74 AC_ARG_ENABLE(memory-sentinels,
75 AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
77 AS_HELP_STRING(--enable-rust, [enable rust integration]))
78 AC_ARG_ENABLE(cargo-online-mode,
79 AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
80 AC_ARG_ENABLE(restart-debugging,
81 AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
82 AC_ARG_ENABLE(zstd-advanced-apis,
83 AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
85 AS_HELP_STRING(--enable-nss, [Use Mozilla's NSS TLS library. (EXPERIMENTAL)]))
87 AS_HELP_STRING(--enable-pic, [Build Tor's binaries as position-independent code, suitable to link as a library.]))
89 AC_ARG_ENABLE(missing-doc-warnings,
90 AS_HELP_STRING(--enable-missing-doc-warnings, [Tell doxygen to warn about missing documentation. Makes doxygen warnings nonfatal.]))
92 if test "$enable_missing_doc_warnings" = "yes"; then
93 DOXYGEN_FATAL_WARNINGS=NO
94 DOXYGEN_WARN_ON_MISSING=YES
95 elif test "$enable_fatal_warnings" = "yes"; then
96 # Fatal warnings from doxygen are nice, but not if we're warning about
97 # missing documentation.
98 DOXYGEN_FATAL_WARNINGS=YES
99 DOXYGEN_WARN_ON_MISSING=NO
101 DOXYGEN_FATAL_WARNINGS=NO
102 DOXYGEN_WARN_ON_MISSING=NO
104 AC_SUBST(DOXYGEN_FATAL_WARNINGS)
105 AC_SUBST(DOXYGEN_WARN_ON_MISSING)
107 if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
108 AC_MSG_ERROR([Can't disable assertions outside of coverage build])
111 AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
112 AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
113 AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
114 AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
115 AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
116 AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
117 AM_CONDITIONAL(USE_NSS, test "x$enable_nss" = "xyes")
118 AM_CONDITIONAL(USE_OPENSSL, test "x$enable_nss" != "xyes")
120 if test "x$enable_nss" = "xyes"; then
121 AC_DEFINE(ENABLE_NSS, 1,
122 [Defined if we're building with NSS.])
124 AC_DEFINE(ENABLE_OPENSSL, 1,
125 [Defined if we're building with OpenSSL or LibreSSL])
128 if test "$enable_static_tor" = "yes"; then
129 enable_static_libevent="yes";
130 enable_static_openssl="yes";
131 enable_static_zlib="yes";
132 CFLAGS="$CFLAGS -static"
135 if test "$enable_system_torrc" = "no"; then
136 AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
137 [Defined if we're not going to look for a torrc in SYSCONF])
140 if test "$enable_memory_sentinels" = "no"; then
141 AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
142 [Defined if we're turning off memory safety code to look for bugs])
145 AC_ARG_ENABLE(manpage,
146 AS_HELP_STRING(--disable-manpage, [Disable manpage generation.]))
148 AC_ARG_ENABLE(html-manual,
149 AS_HELP_STRING(--disable-html-manual, [Disable HTML documentation.]))
151 AC_ARG_ENABLE(asciidoc,
152 AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
153 [case "${enableval}" in
154 "yes") asciidoc=true ;;
155 "no") asciidoc=false ;;
156 *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
157 esac], [asciidoc=true])
159 # systemd notify support
160 AC_ARG_ENABLE(systemd,
161 AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
162 [case "${enableval}" in
163 "yes") systemd=true ;;
164 "no") systemd=false ;;
165 * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
166 esac], [systemd=auto])
168 if test "$enable_restart_debugging" = "yes"; then
169 AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
170 [Defined if we're building with support for in-process restart debugging.])
173 if test "$enable_zstd_advanced_apis" != "no"; then
174 AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
175 [Defined if we're going to try to use zstd's "static-only" APIs.])
179 if test "x$enable_systemd" = "xno"; then
182 PKG_CHECK_MODULES(SYSTEMD,
186 if test "x$have_systemd" = "xno"; then
187 AC_MSG_NOTICE([Okay, checking for systemd a different way...])
188 PKG_CHECK_MODULES(SYSTEMD,
195 if test "x$have_systemd" = "xyes"; then
196 AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
197 TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
198 TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
199 PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
200 [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or greater])], [])
202 AC_SUBST(TOR_SYSTEMD_CFLAGS)
203 AC_SUBST(TOR_SYSTEMD_LIBS)
205 if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
206 AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found, $pkg_config_user_action, or set SYSTEMD_CFLAGS and SYSTEMD_LIBS.])
211 AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
215 AC_ARG_ENABLE(gcc-warnings,
216 AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
217 AC_ARG_ENABLE(fatal-warnings,
218 AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
219 AC_ARG_ENABLE(gcc-warnings-advisory,
220 AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
222 dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
223 AC_ARG_ENABLE(gcc-hardening,
224 AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
226 dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
227 AC_ARG_ENABLE(expensive-hardening,
228 AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
229 AC_ARG_ENABLE(fragile-hardening,
230 AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
231 if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
232 fragile_hardening="yes"
233 AC_DEFINE(DEBUG_SMARTLIST, 1, [Enable smartlist debugging])
236 AC_ARG_ENABLE(all-bugs-are-fatal,
237 AS_HELP_STRING(--enable-all-bugs-are-fatal, [force all soft asserts in Tor codebase (tor_assert_nonfatal(), BUG(), etc.) to act as hard asserts (tor_assert() and equivalents); makes Tor fragile; only recommended for dev builds]))
239 if test "x$enable_all_bugs_are_fatal" = "xyes"; then
240 AC_DEFINE(ALL_BUGS_ARE_FATAL, 1, [All assert failures are fatal])
243 dnl Linker hardening options
244 dnl Currently these options are ELF specific - you can't use this with MacOSX
245 AC_ARG_ENABLE(linker-hardening,
246 AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
248 AC_ARG_ENABLE(local-appdata,
249 AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
250 if test "$enable_local_appdata" = "yes"; then
251 AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
252 [Defined if we default to host local appdata paths on Windows])
255 AC_ARG_ENABLE(tool-name-check,
256 AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
258 AC_ARG_ENABLE(seccomp,
259 AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
261 AC_ARG_ENABLE(libscrypt,
262 AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
264 dnl --- Tracing Options. ---
268 dnl LTTng instrumentation option.
269 AC_ARG_ENABLE(tracing-instrumentation-lttng,
270 AS_HELP_STRING([--enable-tracing-instrumentation-lttng],
271 [build with LTTng-UST instrumentation]))
272 AM_CONDITIONAL([USE_TRACING_INSTRUMENTATION_LTTNG],
273 [test "x$enable_tracing_instrumentation_lttng" = "xyes"])
275 if test "x$enable_tracing_instrumentation_lttng" = "xyes"; then
276 AC_CHECK_HEADERS([lttng/tracepoint.h], [],
277 [AC_MSG_ERROR([LTTng instrumentation headers not found.
278 On Debian, apt install liblttng-ust-dev"])], [])
279 AC_DEFINE([USE_TRACING_INSTRUMENTATION_LTTNG], [1], [Using LTTng instrumentation])
280 TOR_TRACE_LIBS="-llttng-ust -ldl"
284 dnl USDT instrumentation option.
285 AC_ARG_ENABLE(tracing-instrumentation-usdt,
286 AS_HELP_STRING([--enable-tracing-instrumentation-usdt],
287 [build with tracing USDT instrumentation]))
288 AM_CONDITIONAL([USE_TRACING_INSTRUMENTATION_USDT],
289 [test "x$enable_tracing_instrumentation_usdt" = "xyes"])
291 if test "x$enable_tracing_instrumentation_usdt" = "xyes"; then
292 AC_CHECK_HEADERS([sys/sdt.h], [],
293 [AC_MSG_ERROR([USDT instrumentation requires sys/sdt.h header.
294 On Debian, apt install systemtap-sdt-dev])], [])
295 dnl LTTng generates USDT probes if the UST library was built with
296 dnl --with-sdt. There is unfortunately no way to check that so we always
297 dnl build the USDT probes even though LTTng instrumentation was requested.
298 AC_DEFINE([USE_TRACING_INSTRUMENTATION_USDT], [1], [Using USDT instrumentation])
302 dnl Tracepoints event to debug logs.
303 AC_ARG_ENABLE(tracing-instrumentation-log-debug,
304 AS_HELP_STRING([--enable-tracing-instrumentation-log-debug],
305 [build with tracing event to debug log]),
306 AC_DEFINE([USE_TRACING_INSTRUMENTATION_LOG_DEBUG], [1],
307 [Tracepoints to log debug]), [])
308 AM_CONDITIONAL([USE_TRACING_INSTRUMENTATION_LOG_DEBUG],
309 [test "x$enable_tracing_instrumentation_log_debug" = "xyes"])
310 if test "x$enable_tracing_instrumentation_log_debug" = "xyes"; then
314 dnl Define that tracing is supported if any instrumentation is used.
315 AM_COND_IF([USE_TRACING_INSTRUMENTATION_LOG_DEBUG],
316 AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
317 AM_COND_IF([USE_TRACING_INSTRUMENTATION_USDT],
318 AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
319 AM_COND_IF([USE_TRACING_INSTRUMENTATION_LTTNG],
320 AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
321 AM_CONDITIONAL([USE_TRACING], [test "x$have_tracing" = x1 ])
323 dnl Finally, define the trace libs.
324 AC_SUBST([TOR_TRACE_LIBS])
326 dnl -- End Tracing Options. --
328 dnl Enable Android only features.
329 AC_ARG_ENABLE(android,
330 AS_HELP_STRING(--enable-android, [build with Android features enabled]))
331 AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
333 if test "x$enable_android" = "xyes"; then
334 AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
336 dnl Check if the Android log library is available.
337 AC_CHECK_HEADERS([android/log.h])
338 AC_SEARCH_LIBS(__android_log_write, [log])
343 dnl Tor modules options. These options are namespaced with --disable-module-XXX
347 m4_define(MODULES, relay dirauth dircache)
350 AC_ARG_ENABLE([module-relay],
351 AS_HELP_STRING([--disable-module-relay],
352 [Build tor without the Relay modules: tor can not run as a relay, bridge, or authority. Implies --disable-module-dirauth]))
353 AM_CONDITIONAL(BUILD_MODULE_RELAY, [test "x$enable_module_relay" != "xno"])
354 AM_COND_IF(BUILD_MODULE_RELAY,
355 AC_DEFINE([HAVE_MODULE_RELAY], [1],
356 [Compile with Relay feature support]))
358 dnl Dircache module. (This cannot be enabled or disabled independently of
359 dnl the relay module. It is not listed by --list-modules for this reason.)
360 AM_CONDITIONAL(BUILD_MODULE_DIRCACHE,
361 [test "x$enable_module_relay" != "xno"])
362 AM_COND_IF(BUILD_MODULE_DIRCACHE,
363 AC_DEFINE([HAVE_MODULE_DIRCACHE], [1],
364 [Compile with directory cache support]))
366 dnl Directory Authority module.
367 AC_ARG_ENABLE([module-dirauth],
368 AS_HELP_STRING([--disable-module-dirauth],
369 [Build tor without the Directory Authority module: tor can not run as a directory authority or bridge authority]))
370 AM_CONDITIONAL(BUILD_MODULE_DIRAUTH,[test "x$enable_module_dirauth" != "xno" && test "x$enable_module_relay" != "xno"])
371 AM_COND_IF(BUILD_MODULE_DIRAUTH,
372 AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
373 [Compile with Directory Authority feature support]))
375 dnl Helper variables.
376 TOR_MODULES_ALL_ENABLED=
377 AC_DEFUN([ADD_MODULE], [
378 MODULE=m4_toupper($1)
379 TOR_MODULES_ALL_ENABLED="${TOR_MODULES_ALL_ENABLED} -DHAVE_MODULE_${MODULE}=1"
381 m4_foreach_w([module], MODULES, [ADD_MODULE([module])])
382 AC_SUBST(TOR_MODULES_ALL_ENABLED)
384 dnl check for the correct "ar" when cross-compiling.
385 dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
386 dnl so kludge up a replacement for the case where it isn't there yet.)
387 m4_ifdef([AM_PROG_AR],
389 [AN_MAKEVAR([AR], [AC_PROG_AR])
390 AN_PROGRAM([ar], [AC_PROG_AR])
391 AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
394 dnl Check whether the above macro has settled for a simply named tool even
395 dnl though we're cross compiling. We must do this before running AC_PROG_CC,
396 dnl because that will find any cc on the system, not only the cross-compiler,
397 dnl and then verify that a binary built with this compiler runs on the
398 dnl build system. It will then come to the false conclusion that we're not
400 if test "x$enable_tool_name_check" != "xno"; then
401 if test "x$ac_tool_warned" = "xyes"; then
402 AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
403 elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
404 AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
414 AC_ARG_VAR([PERL], [path to Perl binary])
415 AC_CHECK_PROGS([PERL], [perl])
416 AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
418 dnl check for asciidoc and a2x
419 AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
420 AC_PATH_PROGS([A2X], [a2x a2x.py], none)
422 AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
423 AM_CONDITIONAL(BUILD_MANPAGE, [test "x$enable_manpage" != "xno"])
424 AM_CONDITIONAL(BUILD_HTML_DOCS, [test "x$enable_html_manual" != "xno"])
429 AC_CACHE_CHECK([for Python 3], [tor_cv_PYTHON],
430 [AC_PATH_PROGS_FEATURE_CHECK([PYTHON], [ \
432 python3.8 python3.7 python3.6 python3.5 python3.4 \
434 [["$ac_path_PYTHON" -c 'import sys; sys.exit(sys.version_info[0]<3)' && tor_cv_PYTHON="$ac_path_PYTHON" ac_path_PYTHON_found=:]] )])
435 AC_SUBST([PYTHON], [$tor_cv_PYTHON])
437 PYTHON="$tor_cv_PYTHON"
439 if test "x$PYTHON" = "x"; then
441 AC_MSG_WARN([Python 3 unavailable; some tests will not be run.])
444 AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
446 dnl List all external rust crates we depend on here. Include the version
451 AC_SUBST(rust_crates)
453 ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
454 AC_C_FLEXIBLE_ARRAY_MEMBER
456 dnl Maybe we've got an old autoconf...
457 AC_CACHE_CHECK([for flexible array members],
461 struct abc { int a; char b[]; };
463 struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
466 [tor_cv_c_flexarray=yes],
467 [tor_cv_c_flexarray=no])])
468 if test "$tor_cv_flexarray" = "yes"; then
469 AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
471 AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
475 AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
478 [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
479 [tor_cv_c_c99_decl=yes],
480 [tor_cv_c_c99_decl=no] )])
481 if test "$tor_cv_c_c99_decl" != "yes"; then
482 AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
485 AC_CACHE_CHECK([for working C99 designated initializers],
486 tor_cv_c_c99_designated_init,
488 [AC_LANG_PROGRAM([struct s { int a; int b; };],
489 [[ struct s ss = { .b = 5, .a = 6 }; ]])],
490 [tor_cv_c_c99_designated_init=yes],
491 [tor_cv_c_c99_designated_init=no] )])
493 if test "$tor_cv_c_c99_designated_init" != "yes"; then
494 AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
497 saved_CFLAGS="$CFLAGS"
498 CFLAGS="$CFLAGS -Werror"
499 AC_CACHE_CHECK([for __attribute__((fallthrough))],
500 tor_cv_c_attr_fallthrough,
502 [AC_LANG_PROGRAM([extern int x; void fn(void) ;],
503 [[ switch (x) { case 1: fn(); __attribute__((fallthrough));
504 case 2: fn(); break; } ]])],
505 [tor_cv_c_attr_fallthrough=yes],
506 [tor_cv_c_attr_fallthrough=no] )])
507 CFLAGS="$saved_CFLAGS"
509 if test "$tor_cv_c_attr_fallthrough" = "yes"; then
510 AC_DEFINE(HAVE_ATTR_FALLTHROUGH, [1], [defined if we have the fallthrough attribute.])
514 AC_ARG_WITH(tor-user,
515 AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
523 AC_ARG_WITH(tor-group,
524 AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
532 dnl If _WIN32 is defined and non-zero, we are building for win32
533 AC_MSG_CHECKING([for win32])
534 AC_RUN_IFELSE([AC_LANG_SOURCE([
535 int main(int c, char **v) {
546 bwin32=true; AC_MSG_RESULT([yes]),
547 bwin32=false; AC_MSG_RESULT([no]),
548 bwin32=cross; AC_MSG_RESULT([cross])
551 if test "$bwin32" = "cross"; then
552 AC_MSG_CHECKING([for win32 (cross)])
553 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
555 int main(int c, char **v) {return 0;}
558 int main(int c, char **v) {return x(y);}
561 bwin32=true; AC_MSG_RESULT([yes]),
562 bwin32=false; AC_MSG_RESULT([no]))
567 /* Defined to access windows functions and definitions for >=WinXP */
569 # define WINVER 0x0501
572 /* Defined to access _other_ windows functions and definitions for >=WinXP */
573 # ifndef _WIN32_WINNT
574 # define _WIN32_WINNT 0x0501
577 /* Defined to avoid including some windows headers as part of Windows.h */
578 # ifndef WIN32_LEAN_AND_MEAN
579 # define WIN32_LEAN_AND_MEAN 1
584 AM_CONDITIONAL(WIN32, test "x$bwin32" = "xtrue")
585 AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
586 AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
588 dnl Enable C99 when compiling with MIPSpro
589 AC_MSG_CHECKING([for MIPSpro compiler])
590 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
591 #if (defined(__sgi) && defined(_COMPILER_VERSION))
596 bmipspro=false; AC_MSG_RESULT(no),
597 bmipspro=true; AC_MSG_RESULT(yes))
599 if test "$bmipspro" = "true"; then
600 CFLAGS="$CFLAGS -c99"
605 AC_ARG_VAR([TOR_RUST_TARGET], [Rust target, must be specified when cross-compiling (HOST != BUILD). example: i686-pc-windows-gnu])
607 if test "x$enable_rust" = "xyes"; then
608 AC_ARG_VAR([RUSTC], [path to the rustc binary])
609 AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
610 if test "x$RUSTC" = "xno"; then
611 AC_MSG_ERROR([rustc unavailable but rust integration requested.])
614 AC_ARG_VAR([CARGO], [path to the cargo binary])
615 AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
616 if test "x$CARGO" = "xno"; then
617 AC_MSG_ERROR([cargo unavailable but rust integration requested.])
620 AC_DEFINE([HAVE_RUST], 1, [have Rust])
621 if test "x$enable_fatal_warnings" = "xyes"; then
626 if test "x$enable_cargo_online_mode" = "xyes"; then
630 CARGO_ONLINE=--frozen
633 dnl When we're not allowed to touch the network, we need crate dependencies
634 dnl locally available.
635 AC_MSG_CHECKING([rust crate dependencies])
636 AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
637 if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
638 TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
640 dnl Check whether the path exists before we try to cd into it.
641 if test ! -d "$TOR_RUST_DEPENDENCIES"; then
642 AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
645 dnl Make the path absolute, since we'll be using it from within a
647 TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
649 for dep in $rust_crates; do
650 if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
651 AC_MSG_ERROR([Failure to find rust dependency $TOR_RUST_DEPENDENCIES/$dep. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
655 if test "x$ERRORED" = "x"; then
660 dnl For now both MSVC and MinGW rust libraries will output static libs with
661 dnl the MSVC naming convention.
662 if test "$bwin32" = "true"; then
663 tor_rust_static_name=tor_rust.lib
665 tor_rust_static_name=libtor_rust.a
670 if test -n "$TOR_RUST_TARGET"; then
671 if test "$host" = "$build"; then
672 AC_MSG_ERROR([HOST = BUILD is invalid if TOR_RUST_TARGET is specified, see configure --help for more information.])
674 RUST_TARGET_PROP="target = '$TOR_RUST_TARGET'"
675 TOR_RUST_LIB_PATH="src/rust/target/$TOR_RUST_TARGET/release/$tor_rust_static_name"
677 if test "$host" != "$build"; then
678 AC_MSG_ERROR([TOR_RUST_TARGET must be specified when cross-compiling with Rust enabled.])
681 TOR_RUST_LIB_PATH="src/rust/target/release/$tor_rust_static_name"
684 AC_SUBST(RUST_TARGET_PROP)
685 AC_SUBST(TOR_RUST_LIB_PATH)
686 AC_SUBST(CARGO_ONLINE)
690 dnl Let's check the rustc version, too
691 AC_MSG_CHECKING([rust version])
692 RUSTC_VERSION=`$RUSTC --version`
693 RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
694 RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
695 if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
696 AC_MSG_ERROR([rustc version couldn't be identified])
698 if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 31; then
699 AC_MSG_ERROR([rustc must be at least version 1.31.0])
701 AC_MSG_RESULT([$RUSTC_VERSION])
704 AC_SEARCH_LIBS(socket, [socket network])
705 AC_SEARCH_LIBS(gethostbyname, [nsl])
706 AC_SEARCH_LIBS(dlopen, [dl])
707 AC_SEARCH_LIBS(inet_aton, [resolv])
708 AC_SEARCH_LIBS(backtrace, [execinfo])
710 AC_SEARCH_LIBS([clock_gettime], [rt])
711 if test "$LIBS" != "$saved_LIBS"; then
712 # Looks like we need -lrt for clock_gettime().
716 if test "$bwin32" = "false"; then
717 AC_SEARCH_LIBS(pthread_create, [pthread])
718 AC_SEARCH_LIBS(pthread_detach, [pthread])
721 AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
722 AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
726 RtlSecureZeroMemory \
730 backtrace_symbols_fd \
737 get_current_dir_name \
745 gnu_get_libc_version \
782 # Apple messed up when they added some functions: they
783 # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
786 # We should only probe for these functions if we are sure that we
787 # are not targeting OS X 10.9 or earlier.
788 AC_MSG_CHECKING([for a pre-Yosemite OS X build target])
789 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
791 # include <AvailabilityMacros.h>
792 # ifndef MAC_OS_X_VERSION_10_10
793 # define MAC_OS_X_VERSION_10_10 101000
795 # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
796 # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
797 # error "Running on Mac OS X 10.9 or earlier"
802 [on_macos_pre_10_10=no ; AC_MSG_RESULT([no])],
803 [on_macos_pre_10_10=yes; AC_MSG_RESULT([yes])])
805 if test "$on_macos_pre_10_10" = "no"; then
807 mach_approximate_time \
811 # We should only probe for these functions if we are sure that we
812 # are not targeting OSX 10.11 or earlier.
813 AC_MSG_CHECKING([for a pre-Sierra OSX build target])
814 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
816 # include <AvailabilityMacros.h>
817 # ifndef MAC_OS_X_VERSION_10_12
818 # define MAC_OS_X_VERSION_10_12 101200
820 # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
821 # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
822 # error "Running on Mac OSX 10.11 or earlier"
827 [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
828 [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
830 if test "$on_macos_pre_10_12" = "no"; then
837 if test "$bwin32" != "true"; then
838 AC_CHECK_HEADERS(pthread.h)
839 AC_CHECK_FUNCS(pthread_create)
840 AC_CHECK_FUNCS(pthread_condattr_setclock)
843 if test "$bwin32" = "true"; then
844 AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
851 AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
852 test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
856 AC_MSG_CHECKING([whether free(NULL) works])
857 AC_RUN_IFELSE([AC_LANG_PROGRAM([
863 [free_null_ok=true; AC_MSG_RESULT(yes)],
864 [free_null_ok=false; AC_MSG_RESULT(no)],
865 [free_null_ok=cross; AC_MSG_RESULT(cross)])
867 if test "$free_null_ok" = "false"; then
868 AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
871 dnl ------------------------------------------------------
872 dnl Where do you live, libevent? And how do we call you?
874 if test "$bwin32" = "true"; then
875 TOR_LIB_WS32=-lws2_32
876 TOR_LIB_IPHLPAPI=-liphlpapi
877 TOR_LIB_SHLWAPI=-lshlwapi
878 # Some of the cargo-cults recommend -lwsock32 as well, but I don't
879 # think it's actually necessary.
881 TOR_LIB_USERENV=-luserenv
887 AC_SUBST(TOR_LIB_WS32)
888 AC_SUBST(TOR_LIB_GDI)
889 AC_SUBST(TOR_LIB_IPHLPAPI)
890 AC_SUBST(TOR_LIB_SHLWAPI)
891 AC_SUBST(TOR_LIB_USERENV)
893 tor_libevent_pkg_redhat="libevent"
894 tor_libevent_pkg_debian="libevent-dev"
895 tor_libevent_devpkg_redhat="libevent-devel"
896 tor_libevent_devpkg_debian="libevent-dev"
898 dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
899 dnl linking for static builds.
900 STATIC_LIBEVENT_FLAGS=""
901 if test "$enable_static_libevent" = "yes"; then
902 if test "$have_rt" = "yes"; then
903 STATIC_LIBEVENT_FLAGS=" -lrt "
907 TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
909 #include <winsock2.h>
911 #include <sys/time.h>
912 #include <sys/types.h>
913 #include <event2/event.h>], [
915 #include <winsock2.h>
918 struct event_base *event_base_new(void);
919 void event_base_free(struct event_base *);],
922 {WSADATA d; WSAStartup(0x101,&d); }
924 event_base_free(event_base_new());
925 ], [--with-libevent-dir], [/opt/libevent])
927 dnl Determine the incantation needed to link libevent.
929 save_LDFLAGS="$LDFLAGS"
930 save_CPPFLAGS="$CPPFLAGS"
932 LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
933 LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
934 CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
936 AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
938 if test "$enable_static_libevent" = "yes"; then
939 if test "$tor_cv_library_libevent_dir" = "(system)"; then
940 AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
942 TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
945 if test "x$ac_cv_header_event2_event_h" = "xyes"; then
946 AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
947 AC_SEARCH_LIBS(evdns_base_new, [event event_extra], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for evdns_base_new"))
949 if test "$ac_cv_search_event_new" != "none required"; then
950 TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
952 if test "$ac_cv_search_evdns_base_new" != "none required"; then
953 TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
956 AC_MSG_ERROR("libevent2 is required but the headers could not be found")
960 dnl Now check for particular libevent functions.
961 AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
962 evutil_secure_rng_add_bytes \
963 evdns_base_get_nameserver_addr \
968 LDFLAGS="$save_LDFLAGS"
969 CPPFLAGS="$save_CPPFLAGS"
971 dnl Check that libevent is at least at version 2.0.10, the first stable
972 dnl release of its series
973 CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
974 AC_MSG_CHECKING([whether Libevent is new enough])
975 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
976 #include <event2/event.h>
977 #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
983 ])], [ AC_MSG_RESULT([yes]) ],
984 [ AC_MSG_RESULT([no])
985 AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
988 LDFLAGS="$save_LDFLAGS"
989 CPPFLAGS="$save_CPPFLAGS"
991 AC_SUBST(TOR_LIBEVENT_LIBS)
993 dnl ------------------------------------------------------
994 dnl Where do you live, libm?
996 dnl On some platforms (Haiku/BeOS) the math library is
997 dnl part of libroot. In which case don't link against lm
1000 AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
1001 if test "$ac_cv_search_pow" != "none required"; then
1002 TOR_LIB_MATH="$ac_cv_search_pow"
1005 AC_SUBST(TOR_LIB_MATH)
1007 dnl ------------------------------------------------------
1008 dnl Hello, NSS. You're new around here.
1009 if test "x$enable_nss" = "xyes"; then
1010 PKG_CHECK_MODULES(NSS,
1013 [have_nss=no; AC_MSG_ERROR([You asked for NSS but I can't find it, $pkg_config_user_action, or set NSS_CFLAGS and NSS_LIBS.])])
1014 AC_SUBST(NSS_CFLAGS)
1018 dnl ------------------------------------------------------
1019 dnl Where do you live, openssl? And how do we call you?
1021 if test "x$enable_nss" != "xyes"; then
1023 tor_openssl_pkg_redhat="openssl"
1024 tor_openssl_pkg_debian="libssl-dev"
1025 tor_openssl_devpkg_redhat="openssl-devel"
1026 tor_openssl_devpkg_debian="libssl-dev"
1028 ALT_openssl_WITHVAL=""
1029 AC_ARG_WITH(ssl-dir,
1030 AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
1032 if test "x$withval" != "xno" && test "x$withval" != "x"; then
1033 ALT_openssl_WITHVAL="$withval"
1037 AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
1038 TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
1039 [#include <openssl/ssl.h>
1040 char *getenv(const char *);],
1041 [struct ssl_cipher_st;
1042 unsigned SSL_CIPHER_get_id(const struct ssl_cipher_st *);
1043 char *getenv(const char *);],
1044 dnl This funny-looking test program calls getenv, so that the compiler
1045 dnl will neither make code that call SSL_CIPHER_get_id(NULL) [producing
1046 dnl a crash], nor optimize out the call to SSL_CIPHER_get_id().
1047 dnl We look for SSL_cipher_get_id() because it is present in
1048 dnl OpenSSL >=1.0.1, because it is not deprecated, and because Tor
1050 [if (getenv("THIS_SHOULDNT_BE_SET_X201803")) SSL_CIPHER_get_id((void *)0);], [],
1051 [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
1053 if test "$enable_static_openssl" = "yes"; then
1054 if test "$tor_cv_library_openssl_dir" = "(system)"; then
1055 AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
1057 TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
1060 TOR_OPENSSL_LIBS="-lssl -lcrypto"
1062 AC_SUBST(TOR_OPENSSL_LIBS)
1064 dnl Now validate openssl, and check for particular openssl functions.
1066 save_LDFLAGS="$LDFLAGS"
1067 save_CPPFLAGS="$CPPFLAGS"
1068 LIBS="$TOR_OPENSSL_LIBS $LIBS"
1069 LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
1070 CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
1072 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1073 #include <openssl/opensslv.h>
1074 #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
1079 [ AC_MSG_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
1081 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1082 #include <openssl/opensslv.h>
1083 #include <openssl/evp.h>
1084 #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
1087 #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
1088 #error "curves unavailable"
1092 [ AC_MSG_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
1094 dnl Let's see if we have a version mismatch between includes and libs.
1095 AC_MSG_CHECKING([for significant mismatch between openssl headers and libraries])
1097 AC_TRY_RUN(AC_LANG_PROGRAM([[
1098 #include <openssl/opensslv.h>
1099 #include <openssl/crypto.h>
1101 /* Include major, minor, and fix, but not patch or status. */
1102 unsigned long mask = 0xfffff000;
1103 unsigned long linking = OpenSSL_version_num() & mask;
1104 unsigned long running = OPENSSL_VERSION_NUMBER & mask;
1105 return !(linking==running);
1106 ]]), [openssl_ver_mismatch=no], [
1107 # This is a kludge to figure out whether compilation failed, or whether
1108 # running the program failed.
1109 if test "$ac_retval" == "1"; then
1110 openssl_ver_mismatch=inconclusive
1112 openssl_ver_mismatch=yes
1113 fi], [openssl_ver_mismatch=cross])
1114 AC_MSG_RESULT([$openssl_ver_mismatch])
1116 AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
1117 [#include <openssl/ssl.h>
1120 dnl OpenSSL functions which we might not have. In theory, we could just
1121 dnl check the openssl version number, but in practice that gets pretty
1122 dnl confusing with LibreSSL, OpenSSL, and various distributions' patches
1125 ERR_load_KDF_strings \
1128 SSL_CTX_set1_groups_list \
1129 SSL_CTX_set_security_level \
1130 SSL_SESSION_get_master_key \
1131 SSL_get_client_ciphers \
1132 SSL_get_client_random \
1133 SSL_get_server_random \
1137 dnl Check if OpenSSL structures are opaque
1138 AC_CHECK_MEMBERS([SSL.state], , ,
1139 [#include <openssl/ssl.h>
1142 AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
1143 #include <openssl/sha.h>
1148 dnl We will someday make KECCAK_TINY optional, but for now we still need
1149 dnl it for SHAKE, since OpenSSL's SHAKE can't be squeezed more than
1150 dnl once. See comment in the definition of crypto_xof_t.
1152 dnl AM_CONDITIONAL(BUILD_KECCAK_TINY,
1153 dnl test "x$ac_cv_func_EVP_sha3_256" != "xyes")
1155 AM_CONDITIONAL(BUILD_KECCAK_TINY, true)
1157 dnl ======================================================================
1158 dnl Can we use KIST?
1160 dnl Define the set of checks for KIST scheduler support.
1161 AC_DEFUN([CHECK_KIST_SUPPORT],[
1162 dnl KIST needs struct tcp_info and for certain members to exist.
1164 [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
1165 , ,[[#include <netinet/tcp.h>]])
1166 dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
1167 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
1168 #include <linux/sockios.h>
1172 ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
1173 if test "x$have_siocoutqnsd" = "xyes"; then
1174 if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
1175 if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
1176 have_kist_support=yes
1181 dnl Now, trigger the check.
1183 AS_IF([test "x$have_kist_support" = "xyes"],
1184 [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
1186 [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
1189 LDFLAGS="$save_LDFLAGS"
1190 CPPFLAGS="$save_CPPFLAGS"
1192 dnl ------------------------------------------------------
1193 dnl Where do you live, zlib? And how do we call you?
1195 tor_zlib_pkg_redhat="zlib"
1196 tor_zlib_pkg_debian="zlib1g"
1197 tor_zlib_devpkg_redhat="zlib-devel"
1198 tor_zlib_devpkg_debian="zlib1g-dev"
1200 TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
1201 [#include <zlib.h>],
1202 [const char * zlibVersion(void);],
1203 [zlibVersion();], [--with-zlib-dir],
1206 if test "$enable_static_zlib" = "yes"; then
1207 if test "$tor_cv_library_zlib_dir" = "(system)"; then
1208 AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
1209 using --enable-static-zlib")
1211 TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
1216 AC_SUBST(TOR_ZLIB_LIBS)
1218 dnl ------------------------------------------------------
1219 dnl Where we do we find lzma?
1222 AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
1223 [case "${enableval}" in
1226 * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
1227 esac], [enable_lzma=auto])
1229 if test "x$enable_lzma" = "xno"; then
1232 PKG_CHECK_MODULES([LZMA],
1237 if test "x$have_lzma" = "xno" ; then
1239 AC_MSG_WARN([Unable to find liblzma, $pkg_config_user_action, or set LZMA_CFLAGS and LZMA_LIBS.])
1243 if test "x$have_lzma" = "xyes"; then
1244 AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
1245 TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
1246 TOR_LZMA_LIBS="${LZMA_LIBS}"
1248 AC_SUBST(TOR_LZMA_CFLAGS)
1249 AC_SUBST(TOR_LZMA_LIBS)
1251 dnl ------------------------------------------------------
1252 dnl Where we do we find zstd?
1255 AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
1256 [case "${enableval}" in
1259 * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
1260 esac], [enable_zstd=auto])
1262 if test "x$enable_zstd" = "xno"; then
1265 PKG_CHECK_MODULES([ZSTD],
1270 if test "x$have_zstd" = "xno" ; then
1272 AC_MSG_WARN([Unable to find libzstd, $pkg_config_user_action, or set ZSTD_CFLAGS and ZSTD_LIBS.])
1276 if test "x$have_zstd" = "xyes"; then
1277 AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
1278 TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
1279 TOR_ZSTD_LIBS="${ZSTD_LIBS}"
1281 dnl now check for zstd functions
1283 save_CFLAGS="$CFLAGS"
1284 LIBS="$LIBS $ZSTD_LIBS"
1285 CFLAGS="$CFLAGS $ZSTD_CFLAGS"
1286 AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
1287 ZSTD_estimateDCtxSize)
1289 CFLAGS="$save_CFLAGS"
1291 AC_SUBST(TOR_ZSTD_CFLAGS)
1292 AC_SUBST(TOR_ZSTD_LIBS)
1294 dnl ----------------------------------------------------------------------
1295 dnl Check if libcap is available for capabilities.
1297 tor_cap_pkg_debian="libcap2"
1298 tor_cap_pkg_redhat="libcap"
1299 tor_cap_devpkg_debian="libcap-dev"
1300 tor_cap_devpkg_redhat="libcap-devel"
1302 AC_CHECK_LIB([cap], [cap_init], [],
1303 AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
1305 AC_CHECK_FUNCS(cap_set_proc)
1307 dnl ---------------------------------------------------------------------
1308 dnl Now that we know about our major libraries, we can check for compiler
1309 dnl and linker hardening options. We need to do this with the libraries known,
1310 dnl since sometimes the linker will like an option but not be willing to
1311 dnl use it with a build of a library.
1313 all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
1314 all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
1322 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
1323 #if !defined(__clang__)
1325 #endif])], have_clang=yes, have_clang=no)
1327 if test "x$enable_pic" = "xyes"; then
1328 TOR_CHECK_CFLAGS(-fPIC)
1331 if test "x$enable_gcc_hardening" != "xno"; then
1332 CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
1333 if test "x$have_clang" = "xyes"; then
1334 TOR_CHECK_CFLAGS(-Qunused-arguments)
1336 TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
1337 AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
1338 AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
1339 m4_ifdef([AS_VAR_IF],[
1340 AS_VAR_IF(can_compile, [yes],
1341 AS_VAR_IF(can_link, [yes],
1343 AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
1345 AS_VAR_POPDEF([can_link])
1346 AS_VAR_POPDEF([can_compile])
1347 TOR_CHECK_CFLAGS(-Wstack-protector)
1348 TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
1349 if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
1350 if test "$enable_pic" != "yes"; then
1351 # If we have already enabled -fPIC, then we don't also need to
1352 # compile with -fPIE...
1353 TOR_CHECK_CFLAGS(-fPIE)
1355 # ... but we want to link our executables with -pie in any case, since
1356 # they're executables, not a library.
1357 TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
1359 TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
1361 AC_MSG_CHECKING([whether we can run hardened binaries])
1362 AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
1363 [AC_MSG_RESULT([yes])],
1364 [AC_MSG_RESULT([no])
1366 We can link with compiler hardening options, but we can't run with them.
1367 That's a bad sign! If you must, you can pass --disable-gcc-hardening to
1368 configure, but it would be better to figure out what the underlying problem
1370 [AC_MSG_RESULT([cross])])
1373 if test "$fragile_hardening" = "yes"; then
1374 TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
1375 if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
1377 AC_MSG_WARN([The compiler supports -ftrapv, but for some reason I was not able to link with -ftrapv. Are you missing run-time support? Run-time hardening will not work as well as it should.])
1380 if test "$tor_cv_cflags__ftrapv" != "yes"; then
1381 AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
1384 TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
1385 if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
1386 AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
1389 TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
1390 if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
1391 AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
1394 TOR_TRY_COMPILE_WITH_CFLAGS([-fno-sanitize=float-divide-by-zero], also_link, CFLAGS_UBSAN="-fno-sanitize=float-divide-by-zero", true)
1395 if test "$tor_cv_cflags__fno_sanitize_float_divide_by_zero" = "yes" && test "$tor_can_link__fno_sanitize_float_divide_by_zero" != "yes"; then
1396 AC_MSG_ERROR([The compiler supports -fno-sanitize=float-divide-by-zero, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
1399 TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
1402 dnl Find the correct libraries to add in order to use the sanitizers.
1404 dnl When building Rust, Cargo will run the linker with the -nodefaultlibs
1405 dnl option, which will prevent the compiler from linking the sanitizer
1406 dnl libraries it needs. We need to specify them manually.
1408 dnl What's more, we need to specify them in a linker script rather than
1409 dnl from build.rs: these options aren't allowed in the cargo:rustc-flags
1411 RUST_LINKER_OPTIONS=""
1412 if test "x$have_clang" = "xyes"; then
1413 if test "x$CFLAGS_ASAN" != "x"; then
1414 RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_ASAN -Cdefault-linker-libraries"
1416 if test "x$CFLAGS_UBSAN" != "x"; then
1417 RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_UBSAN -Cdefault-linker-libraries"
1420 if test "x$CFLAGS_ASAN" != "x"; then
1421 RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=address -Cdefault-linker-libraries"
1423 if test "x$CFLAGS_UBSAN" != "x"; then
1424 RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=undefined -Cdefault-linker-libraries"
1427 AC_SUBST(RUST_LINKER_OPTIONS)
1429 CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
1430 CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
1432 mulodi_fixes_ftrapv=no
1433 if test "$have_clang" = "yes"; then
1434 saved_CFLAGS="$CFLAGS"
1435 CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
1436 AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
1441 int main(int argc, char **argv)
1443 int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
1444 * (int64_t)atoi(argv[3]);
1447 [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
1448 [ftrapv_can_link=no; AC_MSG_RESULT([no])])
1449 if test "$ftrapv_can_link" = "no"; then
1450 AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
1455 int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
1459 int main(int argc, char **argv)
1461 int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
1462 * (int64_t)atoi(argv[3]);
1465 [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
1466 [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
1468 CFLAGS="$saved_CFLAGS"
1471 AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
1473 dnl These cflags add bunches of branches, and we haven't been able to
1474 dnl persuade ourselves that they're suitable for code that needs to be
1476 AC_SUBST(CFLAGS_BUGTRAP)
1477 dnl These cflags are variant ones sutable for code that needs to be
1479 AC_SUBST(CFLAGS_CONSTTIME)
1481 if test "x$enable_linker_hardening" != "xno"; then
1482 TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
1485 # For backtrace support
1486 TOR_CHECK_LDFLAGS(-rdynamic)
1488 dnl ------------------------------------------------------
1489 dnl Now see if we have a -fomit-frame-pointer compiler option.
1491 saved_CFLAGS="$CFLAGS"
1492 TOR_CHECK_CFLAGS(-fomit-frame-pointer)
1493 F_OMIT_FRAME_POINTER=''
1494 if test "$saved_CFLAGS" != "$CFLAGS"; then
1495 if test "$fragile_hardening" = "yes"; then
1496 F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
1499 CFLAGS="$saved_CFLAGS"
1500 AC_SUBST(F_OMIT_FRAME_POINTER)
1502 dnl ------------------------------------------------------
1503 dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
1504 dnl for us, as GCC 4.6 and later do at many optimization levels), then
1505 dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
1507 TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
1509 dnl ============================================================
1510 dnl Check for libseccomp
1512 if test "x$enable_seccomp" != "xno"; then
1513 AC_CHECK_HEADERS([seccomp.h])
1514 AC_SEARCH_LIBS(seccomp_init, [seccomp])
1517 dnl ============================================================
1518 dnl Check for libscrypt
1520 if test "x$enable_libscrypt" != "xno"; then
1521 AC_CHECK_HEADERS([libscrypt.h])
1522 AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
1523 AC_CHECK_FUNCS([libscrypt_scrypt])
1526 dnl ============================================================
1527 dnl We need an implementation of curve25519.
1529 dnl set these defaults.
1530 build_curve25519_donna=no
1531 build_curve25519_donna_c64=no
1532 use_curve25519_donna=no
1533 use_curve25519_nacl=no
1536 dnl The best choice is using curve25519-donna-c64, but that requires
1538 AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
1539 tor_cv_can_use_curve25519_donna_c64,
1541 [AC_LANG_PROGRAM([dnl
1543 typedef unsigned uint128_t __attribute__((mode(TI)));
1544 int func(uint64_t a, uint64_t b) {
1545 uint128_t c = ((uint128_t)a) * b;
1546 int ok = ((uint64_t)(c>>96)) == 522859 &&
1547 (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
1548 (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
1549 (((uint64_t)(c))&0xffffffffL) == 0;
1553 int ok = func( ((uint64_t)2000000000) * 1000000000,
1554 ((uint64_t)1234567890) << 24);
1557 [tor_cv_can_use_curve25519_donna_c64=yes],
1558 [tor_cv_can_use_curve25519_donna_c64=no],
1560 [AC_LANG_PROGRAM([dnl
1562 typedef unsigned uint128_t __attribute__((mode(TI)));
1563 int func(uint64_t a, uint64_t b) {
1564 uint128_t c = ((uint128_t)a) * b;
1565 int ok = ((uint64_t)(c>>96)) == 522859 &&
1566 (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
1567 (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
1568 (((uint64_t)(c))&0xffffffffL) == 0;
1572 int ok = func( ((uint64_t)2000000000) * 1000000000,
1573 ((uint64_t)1234567890) << 24);
1576 [tor_cv_can_use_curve25519_donna_c64=cross],
1577 [tor_cv_can_use_curve25519_donna_c64=no])])])
1579 AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
1580 nacl/crypto_scalarmult_curve25519.h])
1582 AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
1583 tor_cv_can_use_curve25519_nacl,
1584 [tor_saved_LIBS="$LIBS"
1587 [AC_LANG_PROGRAM([dnl
1588 #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
1589 #include <crypto_scalarmult_curve25519.h>
1590 #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
1591 #include <nacl/crypto_scalarmult_curve25519.h>
1593 #ifdef crypto_scalarmult_curve25519_ref_BYTES
1594 #error Hey, this is the reference implementation! That's not fast.
1597 unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
1598 ])], [tor_cv_can_use_curve25519_nacl=yes],
1599 [tor_cv_can_use_curve25519_nacl=no])
1600 LIBS="$tor_saved_LIBS" ])
1602 dnl Okay, now we need to figure out which one to actually use. Fall back
1603 dnl to curve25519-donna.c
1605 if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
1606 build_curve25519_donna_c64=yes
1607 use_curve25519_donna=yes
1608 elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
1609 use_curve25519_nacl=yes
1610 CURVE25519_LIBS=-lnacl
1612 build_curve25519_donna=yes
1613 use_curve25519_donna=yes
1616 if test "x$use_curve25519_donna" = "xyes"; then
1617 AC_DEFINE(USE_CURVE25519_DONNA, 1,
1618 [Defined if we should use an internal curve25519_donna{,_c64} implementation])
1620 if test "x$use_curve25519_nacl" = "xyes"; then
1621 AC_DEFINE(USE_CURVE25519_NACL, 1,
1622 [Defined if we should use a curve25519 from nacl])
1624 AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
1625 test "x$build_curve25519_donna" = "xyes")
1626 AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
1627 test "x$build_curve25519_donna_c64" = "xyes")
1628 AC_SUBST(CURVE25519_LIBS)
1630 dnl Make sure to enable support for large off_t if available.
1633 AC_CHECK_HEADERS([errno.h \
1647 gnu/libc-version.h \
1685 AC_CHECK_HEADERS(sys/param.h)
1687 AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
1688 [#ifdef HAVE_SYS_TYPES_H
1689 #include <sys/types.h>
1691 #ifdef HAVE_SYS_SOCKET_H
1692 #include <sys/socket.h>
1694 AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
1695 [#ifdef HAVE_SYS_TYPES_H
1696 #include <sys/types.h>
1698 #ifdef HAVE_SYS_SOCKET_H
1699 #include <sys/socket.h>
1701 #ifdef HAVE_NET_IF_H
1704 #ifdef HAVE_NETINET_IN_H
1705 #include <netinet/in.h>
1708 AC_CHECK_HEADERS(linux/if.h,[],[],
1710 #ifdef HAVE_SYS_SOCKET_H
1711 #include <sys/socket.h>
1715 AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
1716 linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
1717 [#ifdef HAVE_SYS_TYPES_H
1718 #include <sys/types.h>
1720 #ifdef HAVE_SYS_SOCKET_H
1721 #include <sys/socket.h>
1723 #ifdef HAVE_LIMITS_H
1726 #ifdef HAVE_LINUX_TYPES_H
1727 #include <linux/types.h>
1729 #ifdef HAVE_NETINET_IN6_H
1730 #include <netinet/in6.h>
1732 #ifdef HAVE_NETINET_IN_H
1733 #include <netinet/in.h>
1736 AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
1737 linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
1738 [#ifdef HAVE_SYS_TYPES_H
1739 #include <sys/types.h>
1741 #ifdef HAVE_SYS_SOCKET_H
1742 #include <sys/socket.h>
1744 #ifdef HAVE_LIMITS_H
1747 #ifdef HAVE_LINUX_TYPES_H
1748 #include <linux/types.h>
1750 #ifdef HAVE_NETINET_IN6_H
1751 #include <netinet/in6.h>
1753 #ifdef HAVE_NETINET_IN_H
1754 #include <netinet/in.h>
1756 #ifdef HAVE_LINUX_IF_H
1757 #include <linux/if.h>
1761 if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
1764 if test "x$linux_netfilter_ipv4" = "x1"; then
1767 if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
1770 if test "x$transparent_ok" = "x1"; then
1771 AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
1773 AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
1776 AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
1777 [#ifdef HAVE_SYS_TYPES_H
1778 #include <sys/types.h>
1780 #ifdef HAVE_SYS_TIME_H
1781 #include <sys/time.h>
1784 AC_CHECK_SIZEOF(char)
1785 AC_CHECK_SIZEOF(short)
1786 AC_CHECK_SIZEOF(int)
1787 AC_CHECK_SIZEOF(unsigned int)
1788 AC_CHECK_SIZEOF(long)
1789 AC_CHECK_SIZEOF(long long)
1790 AC_CHECK_SIZEOF(__int64)
1791 AC_CHECK_SIZEOF(void *)
1792 AC_CHECK_SIZEOF(time_t)
1793 AC_CHECK_SIZEOF(size_t)
1794 AC_CHECK_SIZEOF(pid_t)
1796 AC_CHECK_TYPES([uint, u_char, ssize_t])
1798 AC_PC_FROM_UCONTEXT([:])
1800 dnl used to include sockaddr_storage, but everybody has that.
1801 AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
1802 [#ifdef HAVE_SYS_TYPES_H
1803 #include <sys/types.h>
1805 #ifdef HAVE_NETINET_IN_H
1806 #include <netinet/in.h>
1808 #ifdef HAVE_NETINET_IN6_H
1809 #include <netinet/in6.h>
1811 #ifdef HAVE_SYS_SOCKET_H
1812 #include <sys/socket.h>
1815 #define _WIN32_WINNT 0x0501
1816 #define WIN32_LEAN_AND_MEAN
1817 #include <winsock2.h>
1818 #include <ws2tcpip.h>
1821 AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
1822 [#ifdef HAVE_SYS_TYPES_H
1823 #include <sys/types.h>
1825 #ifdef HAVE_NETINET_IN_H
1826 #include <netinet/in.h>
1828 #ifdef HAVE_NETINET_IN6_H
1829 #include <netinet/in6.h>
1831 #ifdef HAVE_SYS_SOCKET_H
1832 #include <sys/socket.h>
1835 #define _WIN32_WINNT 0x0501
1836 #define WIN32_LEAN_AND_MEAN
1837 #include <winsock2.h>
1838 #include <ws2tcpip.h>
1842 AC_CHECK_TYPES([rlim_t], , ,
1843 [#ifdef HAVE_SYS_TYPES_H
1844 #include <sys/types.h>
1846 #ifdef HAVE_SYS_TIME_H
1847 #include <sys/time.h>
1849 #ifdef HAVE_SYS_RESOURCE_H
1850 #include <sys/resource.h>
1854 AX_CHECK_SIGN([time_t],
1857 #ifdef HAVE_SYS_TYPES_H
1858 #include <sys/types.h>
1860 #ifdef HAVE_SYS_TIME_H
1861 #include <sys/time.h>
1868 if test "$ax_cv_decl_time_t_signed" = "no"; then
1869 AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
1872 AX_CHECK_SIGN([size_t],
1873 [ tor_cv_size_t_signed=yes ],
1874 [ tor_cv_size_t_signed=no ], [
1875 #ifdef HAVE_SYS_TYPES_H
1876 #include <sys/types.h>
1880 if test "$ax_cv_decl_size_t_signed" = "yes"; then
1881 AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
1884 AX_CHECK_SIGN([enum always],
1885 [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
1887 enum always { AAA, BBB, CCC };
1890 AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
1891 #ifdef HAVE_SYS_SOCKET_H
1892 #include <sys/socket.h>
1896 # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
1898 AC_CHECK_SIZEOF(cell_t)
1900 # Let's see if stdatomic works. (There are some debian clangs that screw it
1901 # up; see Tor bug #26779 and debian bug 903709.)
1902 AC_CACHE_CHECK([whether C11 stdatomic.h actually works],
1903 tor_cv_stdatomic_works,
1904 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
1905 #include <stdatomic.h>
1906 struct x { atomic_size_t y; };
1907 void try_atomic_init(struct x *xx)
1909 atomic_init(&xx->y, 99);
1910 atomic_fetch_add(&xx->y, 1);
1912 ]])], [tor_cv_stdatomic_works=yes], [tor_cv_stdatomic_works=no])])
1914 if test "$tor_cv_stdatomic_works" = "yes"; then
1915 AC_DEFINE(STDATOMIC_WORKS, 1, [Set to 1 if we can compile a simple stdatomic example.])
1916 elif test "$ac_cv_header_stdatomic_h" = "yes"; then
1918 AC_MSG_WARN([Your compiler provides the stdatomic.h header, but it doesn't seem to work. I'll pretend it isn't there. If you are using Clang on Debian, maybe this is because of https://bugs.debian.org/903709 ])
1921 # Now make sure that NULL can be represented as zero bytes.
1922 AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
1923 [AC_RUN_IFELSE([AC_LANG_SOURCE(
1924 [[#include <stdlib.h>
1927 #ifdef HAVE_STDDEF_H
1930 int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
1931 return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
1932 [tor_cv_null_is_zero=yes],
1933 [tor_cv_null_is_zero=no],
1934 [tor_cv_null_is_zero=cross])])
1936 if test "$tor_cv_null_is_zero" = "cross"; then
1937 # Cross-compiling; let's hope that the target isn't raving mad.
1938 AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
1941 if test "$tor_cv_null_is_zero" != "no"; then
1942 AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
1943 [Define to 1 iff memset(0) sets pointers to NULL])
1946 AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
1947 [AC_RUN_IFELSE([AC_LANG_SOURCE(
1948 [[#include <stdlib.h>
1951 #ifdef HAVE_STDDEF_H
1954 int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
1955 return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
1956 [tor_cv_dbl0_is_zero=yes],
1957 [tor_cv_dbl0_is_zero=no],
1958 [tor_cv_dbl0_is_zero=cross])])
1960 if test "$tor_cv_dbl0_is_zero" = "cross"; then
1961 # Cross-compiling; let's hope that the target isn't raving mad.
1962 AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
1965 if test "$tor_cv_dbl0_is_zero" != "no"; then
1966 AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
1967 [Define to 1 iff memset(0) sets doubles to 0.0])
1970 # And what happens when we malloc zero?
1971 AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
1972 [AC_RUN_IFELSE([AC_LANG_SOURCE(
1973 [[#include <stdlib.h>
1976 #ifdef HAVE_STDDEF_H
1979 int main () { return malloc(0)?0:1; }]])],
1980 [tor_cv_malloc_zero_works=yes],
1981 [tor_cv_malloc_zero_works=no],
1982 [tor_cv_malloc_zero_works=cross])])
1984 if test "$tor_cv_malloc_zero_works" = "cross"; then
1985 # Cross-compiling; let's hope that the target isn't raving mad.
1986 AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
1989 if test "$tor_cv_malloc_zero_works" = "yes"; then
1990 AC_DEFINE([MALLOC_ZERO_WORKS], 1,
1991 [Define to 1 iff malloc(0) returns a pointer])
1994 # whether we seem to be in a 2s-complement world.
1995 AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
1996 [AC_RUN_IFELSE([AC_LANG_SOURCE(
1997 [[int main () { int problem = ((-99) != (~99)+1);
1998 return problem ? 1 : 0; }]])],
1999 [tor_cv_twos_complement=yes],
2000 [tor_cv_twos_complement=no],
2001 [tor_cv_twos_complement=cross])])
2003 if test "$tor_cv_twos_complement" = "cross"; then
2004 # Cross-compiling; let's hope that the target isn't raving mad.
2005 AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
2008 if test "$tor_cv_twos_complement" != "no"; then
2009 AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
2010 [Define to 1 iff we represent negative integers with
2014 # What does shifting a negative value do?
2015 AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
2016 [AC_RUN_IFELSE([AC_LANG_SOURCE(
2017 [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
2018 [tor_cv_sign_extend=yes],
2019 [tor_cv_sign_extend=no],
2020 [tor_cv_sign_extend=cross])])
2022 if test "$tor_cv_sign_extend" = "cross"; then
2023 # Cross-compiling; let's hope that the target isn't raving mad.
2024 AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
2027 if test "$tor_cv_sign_extend" != "no"; then
2028 AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
2029 [Define to 1 iff right-shifting a negative value performs sign-extension])
2032 # Is uint8_t the same type as unsigned char?
2033 AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
2034 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
2037 unsigned char c;]])],
2038 [tor_cv_uint8_uchar=yes],
2039 [tor_cv_uint8_uchar=no],
2040 [tor_cv_uint8_uchar=cross])])
2042 if test "$tor_cv_uint8_uchar" = "cross"; then
2043 AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
2046 if test "$tor_cv_uint8_uchar" = "no"; then
2047 AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
2050 AC_ARG_WITH(tcmalloc,
2051 AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library. Deprecated; see --with-malloc]))
2053 default_malloc=system
2055 if test "x$enable_openbsd_malloc" = "xyes" ; then
2056 AC_MSG_NOTICE([The --enable-openbsd-malloc argument is deprecated; use --with-malloc=openbsd instead.])
2057 default_malloc=openbsd
2060 if test "x$with_tcmalloc" = "xyes"; then
2061 AC_MSG_NOTICE([The --with-tcmalloc argument is deprecated; use --with-malloc=tcmalloc instead.])
2062 default_malloc=tcmalloc
2066 AS_HELP_STRING([--with-malloc=[system,jemalloc,tcmalloc,openbsd]],
2067 [select special malloc implementation [system]]),
2068 [ malloc="$with_malloc" ], [ malloc="$default_malloc" ])
2072 PKG_CHECK_MODULES([TCMALLOC],
2077 if test "x$have_tcmalloc" = "xno" ; then
2078 AC_MSG_ERROR([Unable to find tcmalloc requested by --with-malloc, $pkg_config_user_action, or set TCMALLOC_CFLAGS and TCMALLOC_LIBS.])
2081 CFLAGS="$CFLAGS $TCMALLOC_CFLAGS"
2082 LIBS="$TCMALLOC_LIBS $LIBS"
2086 PKG_CHECK_MODULES([JEMALLOC],
2091 if test "x$have_jemalloc" = "xno" ; then
2092 AC_MSG_ERROR([Unable to find jemalloc requested by --with-malloc, $pkg_config_user_action, or set JEMALLOC_CFLAGS and JEMALLOC_LIBS.])
2095 CFLAGS="$CFLAGS $JEMALLOC_CFLAGS"
2096 LIBS="$JEMALLOC_LIBS $LIBS"
2097 using_custom_malloc=yes
2102 AC_MSG_WARN([The openbsd malloc port is deprecated in Tor 0.3.5 and will be removed in a future version.])
2103 enable_openbsd_malloc=yes
2107 # handle this later, including the jemalloc fallback
2108 AC_CHECK_FUNCS(mallinfo)
2111 [AC_MSG_ERROR([--with-malloc=`$with_malloc' not supported, see --help])
2114 AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
2116 if test "$malloc" != "system"; then
2117 # Tell the C compiler not to use the system allocator functions.
2118 TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
2120 if test "$using_custom_malloc" = "yes"; then
2121 # Tell the C compiler not to use the system allocator functions.
2122 TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
2125 # By default, we're going to assume we don't have mlockall()
2126 # bionic and other platforms have various broken mlockall subsystems.
2127 # Some systems don't have a working mlockall, some aren't linkable,
2128 # and some have it but don't declare it.
2129 AC_CHECK_FUNCS(mlockall)
2130 AC_CHECK_DECLS([mlockall], , , [
2131 #ifdef HAVE_SYS_MMAN_H
2132 #include <sys/mman.h>
2135 # Allow user to specify an alternate syslog facility
2136 AC_ARG_WITH(syslog-facility,
2137 AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
2138 syslog_facility="$withval", syslog_facility="LOG_DAEMON")
2139 AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
2140 AC_SUBST(LOGFACILITY)
2142 # Check if we have getresuid and getresgid
2143 AC_CHECK_FUNCS(getresuid getresgid)
2145 # Check for gethostbyname_r in all its glorious incompatible versions.
2146 # (This logic is based on that in Python's configure.in)
2147 AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
2148 [Define this if you have any gethostbyname_r()])
2150 AC_CHECK_FUNC(gethostbyname_r, [
2151 AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
2153 CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
2154 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2158 struct hostent *h1, *h2;
2160 (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
2162 AC_DEFINE(HAVE_GETHOSTBYNAME_R)
2163 AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
2164 [Define this if gethostbyname_r takes 6 arguments])
2167 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2173 (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
2175 AC_DEFINE(HAVE_GETHOSTBYNAME_R)
2176 AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
2177 [Define this if gethostbyname_r takes 5 arguments])
2180 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2185 struct hostent_data hd;
2186 (void) gethostbyname_r(cp1,h1,&hd);
2188 AC_DEFINE(HAVE_GETHOSTBYNAME_R)
2189 AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
2190 [Define this if gethostbyname_r takes 3 arguments])
2200 AC_CACHE_CHECK([whether the C compiler supports __func__],
2201 tor_cv_have_func_macro,
2202 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
2204 int main(int c, char **v) { puts(__func__); }])],
2205 tor_cv_have_func_macro=yes,
2206 tor_cv_have_func_macro=no))
2208 AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
2209 tor_cv_have_FUNC_macro,
2210 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
2212 int main(int c, char **v) { puts(__FUNC__); }])],
2213 tor_cv_have_FUNC_macro=yes,
2214 tor_cv_have_FUNC_macro=no))
2216 AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
2217 tor_cv_have_FUNCTION_macro,
2218 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
2220 int main(int c, char **v) { puts(__FUNCTION__); }])],
2221 tor_cv_have_FUNCTION_macro=yes,
2222 tor_cv_have_FUNCTION_macro=no))
2224 AC_CACHE_CHECK([whether we have extern char **environ already declared],
2225 tor_cv_have_environ_declared,
2226 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
2227 #ifdef HAVE_UNISTD_H
2231 int main(int c, char **v) { char **t = environ; }])],
2232 tor_cv_have_environ_declared=yes,
2233 tor_cv_have_environ_declared=no))
2235 if test "$tor_cv_have_func_macro" = "yes"; then
2236 AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
2239 if test "$tor_cv_have_FUNC_macro" = "yes"; then
2240 AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
2243 if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
2244 AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
2245 [Defined if the compiler supports __FUNCTION__])
2248 if test "$tor_cv_have_environ_declared" = "yes"; then
2249 AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
2250 [Defined if we have extern char **environ already declared])
2253 # $prefix stores the value of the --prefix command line option, or
2254 # NONE if the option wasn't set. In the case that it wasn't set, make
2255 # it be the default, so that we can use it to expand directories now.
2256 if test "x$prefix" = "xNONE"; then
2257 prefix=$ac_default_prefix
2260 # and similarly for $exec_prefix
2261 if test "x$exec_prefix" = "xNONE"; then
2265 if test "x$BUILDDIR" = "x"; then
2269 AH_TEMPLATE([BUILDDIR],[tor's build directory])
2270 AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
2272 if test "x$SRCDIR" = "x"; then
2273 SRCDIR=$(cd "$srcdir"; pwd)
2275 AH_TEMPLATE([SRCDIR],[tor's sourcedir directory])
2276 AC_DEFINE_UNQUOTED(SRCDIR,"$SRCDIR")
2278 if test "x$CONFDIR" = "x"; then
2279 CONFDIR=`eval echo $sysconfdir/tor`
2282 AH_TEMPLATE([CONFDIR],[tor's configuration directory])
2283 AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
2285 BINDIR=`eval echo $bindir`
2287 LOCALSTATEDIR=`eval echo $localstatedir`
2288 AC_SUBST(LOCALSTATEDIR)
2290 if test "$bwin32" = "true"; then
2291 # Test if the linker supports the --nxcompat and --dynamicbase options
2293 save_LDFLAGS="$LDFLAGS"
2294 LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
2295 AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
2296 AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
2297 [AC_MSG_RESULT([yes])]
2298 [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
2299 [AC_MSG_RESULT([no])]
2301 LDFLAGS="$save_LDFLAGS"
2304 # Set CFLAGS _after_ all the above checks, since our warnings are stricter
2305 # than autoconf's macros like.
2306 if test "$GCC" = "yes"; then
2307 # Disable GCC's strict aliasing checks. They are an hours-to-debug
2308 # accident waiting to happen.
2309 CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
2311 # Override optimization level for non-gcc compilers
2313 enable_gcc_warnings=no
2314 enable_gcc_warnings_advisory=no
2317 # Warnings implies advisory-warnings and -Werror.
2318 if test "$enable_gcc_warnings" = "yes"; then
2319 enable_gcc_warnings_advisory=yes
2320 enable_fatal_warnings=yes
2323 # OS X Lion started deprecating the system openssl. Let's just disable
2324 # all deprecation warnings on OS X. Also, to potentially make the binary
2325 # a little smaller, let's enable dead_strip.
2329 CFLAGS="$CFLAGS -Wno-deprecated-declarations"
2330 LDFLAGS="$LDFLAGS -dead_strip" ;;
2333 TOR_WARNING_FLAGS=""
2335 # Add some more warnings which we use in development but not in the
2336 # released versions. (Some relevant gcc versions can't handle these.)
2338 # Note that we have to do this near the end of the autoconf process, or
2339 # else we may run into problems when these warnings hit on the testing C
2340 # programs that autoconf wants to build.
2341 if test "x$enable_gcc_warnings_advisory" != "xno"; then
2344 *-*-openbsd* | *-*-bitrig*)
2345 # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
2346 # That's fine, except that the headers don't pass -Wredundant-decls.
2347 # Therefore, let's disable -Wsystem-headers when we're building
2348 # with maximal warnings on OpenBSD.
2349 CFLAGS="$CFLAGS -Wno-system-headers" ;;
2352 CFLAGS_NOWARNINGS="$CFLAGS"
2354 # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
2355 # have it work better.
2356 # CFLAGS="$CFLAGS -Wstrict-overflow=1"
2358 # This warning was added in gcc 4.3, but it appears to generate
2359 # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
2360 #CFLAGS="$CFLAGS -Wlogical-op"
2362 m4_foreach_w([warning_flag], [
2364 -Waddress-of-array-temporary
2365 -Waddress-of-temporary
2367 -Wanonymous-pack-parens
2370 -Warc-bridge-casts-disallowed-in-nonarc
2371 -Warc-maybe-repeated-use-of-weak
2372 -Warc-performSelector-leaks
2373 -Warc-repeated-use-of-weak
2375 -Warray-bounds-pointer-arithmetic
2377 -Wasm-operand-widths
2379 -Watomic-property-with-user-defined-accessor
2381 -Wauto-storage-class
2384 -Wbackslash-newline-escape
2385 -Wbad-array-new-length
2386 -Wbind-to-temporary-copy
2387 -Wbitfield-constant-conversion
2390 -Wbuiltin-requires-header
2392 -Wcompare-distinct-pointer-types
2393 -Wcomplex-component-init
2394 -Wconditional-type-mismatch
2396 -Wconstant-conversion
2397 -Wconstant-logical-operand
2398 -Wconstexpr-not-const
2399 -Wcustom-atomic-properties
2401 -Wdangling-initializer-list
2403 -Wdelegating-ctor-cycles
2404 -Wdeprecated-implementations
2405 -Wdeprecated-register
2406 -Wdirect-ivar-access
2408 -Wdistributed-object-modifiers
2410 -Wdollar-in-identifier-extension
2412 -Wduplicate-decl-specifier
2414 -Wduplicate-method-arg
2415 -Wduplicate-method-match
2417 -Wdynamic-class-memaccess
2418 -Wembedded-directive
2419 -Wempty-translation-unit
2421 -Wexit-time-destructors
2422 -Wexplicit-ownership-type
2423 -Wextern-initializer
2427 -Wflexible-array-extensions
2430 -Wfour-char-constants
2432 -Wglobal-constructors
2433 -Wgnu-array-member-paren-init
2435 -Wgnu-static-float-init
2438 -Widiomatic-parentheses
2439 -Wignored-attributes
2440 -Wimplicit-atomic-properties
2441 -Wimplicit-conversion-floating-point-to-bool
2442 -Wimplicit-exception-spec-mismatch
2443 -Wimplicit-fallthrough
2444 -Wimplicit-fallthrough-per-function
2445 -Wimplicit-retain-self
2446 -Wimport-preprocessor-directive-pedantic
2447 -Wincompatible-library-redeclaration
2448 -Wincompatible-pointer-types-discards-qualifiers
2449 -Wincomplete-implementation
2451 -Wincomplete-umbrella
2454 -Wint-to-void-pointer-cast
2460 -Winvalid-source-encoding
2461 -Winvalid-token-paste
2462 -Wknr-promoted-parameter
2463 -Wlarge-by-value-copy
2464 -Wliteral-conversion
2466 -Wlocal-type-template-args
2470 -Wmalformed-warning-check
2474 -Wmismatched-parameter-types
2475 -Wmismatched-return-types
2476 -Wmissing-field-initializers
2477 -Wmissing-format-attribute
2479 -Wmissing-selector-name
2481 -Wmissing-variable-declarations
2485 -Wnon-literal-null-conversion
2487 -Wnonportable-cfstrings
2493 -Wout-of-line-declaration
2495 -Woverlength-strings
2497 -Woverriding-method-mismatch
2498 -Wpointer-type-mismatch
2499 -Wpredefined-identifier-outside-function
2500 -Wprotocol-property-synthesis-ambiguity
2501 -Wreadonly-iboutlet-property
2502 -Wreadonly-setter-attrs
2504 -Wreceiver-forward-class
2506 -Wreinterpret-base-class
2507 -Wrequires-super-attribute
2508 -Wreserved-user-defined-literal
2509 -Wreturn-stack-address
2511 -Wselector-type-mismatch
2513 -Wserialized-diagnostics
2515 -Wshift-count-negative
2516 -Wshift-count-overflow
2517 -Wshift-negative-value
2519 -Wshift-sign-overflow
2521 -Wsizeof-array-argument
2522 -Wsource-uses-openmp
2525 -Wstatic-local-in-inline
2529 -Wstrlcpy-strlcat-size
2531 -Wsuggest-attribute=format
2532 -Wsuggest-attribute=noreturn
2533 -Wsuper-class-method-mismatch
2536 -Wtautological-constant-out-of-range-compare
2537 -Wtentative-definition-incomplete-type
2540 -Wtypedef-redefinition
2543 -Wundefined-internal
2544 -Wundefined-reinterpret-cast
2546 -Wunicode-whitespace
2547 -Wunknown-warning-option
2548 -Wunnamed-type-template-args
2549 -Wunneeded-member-function
2551 -Wunsupported-visibility
2552 -Wunused-but-set-parameter
2553 -Wunused-but-set-variable
2554 -Wunused-command-line-argument
2555 -Wunused-const-variable=2
2556 -Wunused-exception-parameter
2557 -Wunused-local-typedefs
2558 -Wunused-member-function
2559 -Wunused-sanitize-argument
2560 -Wunused-volatile-lvalue
2561 -Wuser-defined-literals
2564 -Wvector-conversions
2569 ], [ TOR_TRY_COMPILE_WITH_CFLAGS(warning_flag, [],
2570 [TOR_WARNING_FLAGS="$TOR_WARNING_FLAGS warning_flag" CFLAGS="$CFLAGS warning_flag"], true)
2573 dnl We should re-enable this in some later version. Clang doesn't
2574 dnl mind, but it causes trouble with GCC.
2575 dnl -Wstrict-overflow=2
2577 dnl These seem to require annotations that we don't currently use,
2578 dnl and they give false positives in our pthreads wrappers. (Clang 4)
2580 dnl -Wthread-safety-analysis
2581 dnl -Wthread-safety-attributes
2582 dnl -Wthread-safety-beta
2583 dnl -Wthread-safety-precise
2585 W_FLAGS="$W_FLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
2586 W_FLAGS="$W_FLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
2587 W_FLAGS="$W_FLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
2588 W_FLAGS="$W_FLAGS -Wwrite-strings"
2589 W_FLAGS="$W_FLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
2590 W_FLAGS="$W_FLAGS -Waggregate-return -Wpacked -Wunused"
2591 W_FLAGS="$W_FLAGS -Wunused-parameter "
2592 # These interfere with building main() { return 0; }, which autoconf
2593 # likes to use as its default program.
2594 W_FLAGS="$W_FLAGS -Wold-style-definition -Wmissing-declarations"
2596 TOR_WARNING_FLAGS="$TOR_WARNING_FLAGS $W_FLAGS"
2597 CFLAGS="$CFLAGS $W_FLAGS"
2599 if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
2600 AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
2602 if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
2603 AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
2605 if test "$tor_cv_cflags__warn_unused_const_variable_2" = "yes"; then
2606 AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
2609 CFLAGS="$CFLAGS_NOWARNINGS"
2611 if test "x$enable_fatal_warnings" = "xyes"; then
2612 # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
2613 # default autoconf programs are full of errors.
2614 CFLAGS="$CFLAGS -Werror"
2619 AC_SUBST(TOR_WARNING_FLAGS)
2621 echo "$TOR_WARNING_FLAGS">warning_flags
2623 TOR_TRY_COMPILE_WITH_CFLAGS([@warning_flags], [],
2624 CFLAGS="$CFLAGS @warning_flags",
2625 CFLAGS="$CFLAGS $TOR_WARNING_FLAGS")
2627 if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
2631 AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
2635 CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
2641 contrib/operator-tools/tor.logrotate
2642 src/config/torrc.sample
2643 src/config/torrc.minimal
2644 src/rust/.cargo/config
2645 scripts/maint/checkOptionDocs.pl
2649 if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
2650 regular_mans="doc/man/tor doc/man/tor-gencert doc/man/tor-resolve doc/man/torify"
2651 for file in $regular_mans ; do
2652 if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
2653 echo "==================================";
2655 echo "Building Tor has failed since manpages cannot be built.";
2657 echo "You need asciidoc installed to be able to build the manpages.";
2658 echo "To build without manpages, use the --disable-asciidoc argument";
2659 echo "when calling configure.";
2661 echo "==================================";
2667 if test "$fragile_hardening" = "yes"; then
2672 Warning! Building Tor with --enable-fragile-hardening (also known as
2673 --enable-expensive-hardening) makes some kinds of attacks harder, but makes
2674 other kinds of attacks easier. A Tor instance build with this option will be
2675 somewhat less vulnerable to remote code execution, arithmetic overflow, or
2676 out-of-bounds read/writes... but at the cost of becoming more vulnerable to
2677 denial of service attacks. For more information, see
2678 https://gitlab.torproject.org/tpo/core/team/-/wikis/TorFragileHardening
2685 if test "$openssl_ver_mismatch" = "yes"; then
2689 Warning! The version OpenSSL headers we get from compiling with
2690 "${TOR_CPPFLAGS_OPENSSL:-(no extra options)}"
2691 do not match version of the OpenSSL library we get when linking with
2692 "$TOR_LDFLAGS_OPENSSL $TOR_OPENSSL_LIBS".
2693 This might cause compilation to fail. Try using --with-openssl-dir to specify
2694 the exact OpenSSL path you want.
2700 # Mini-report on what will be built.
2704 PPRINT_SET_INDENT(1)
2708 AS_ECHO("Tor Version: ${PPRINT_COLOR_BLDBLU}Tor $PACKAGE_VERSION $PPRINT_COLOR_RST")
2711 PPRINT_SUBTITLE([Build Features])
2713 PPRINT_PROP_STRING([Compiler], [$CC])
2714 PPRINT_PROP_STRING([Host OS], [$host_os])
2717 test "x$enable_fatal_warnings" = "xyes" && value=1 || value=0
2718 PPRINT_PROP_BOOL([Warnings are fatal (--enable-fatal-warnings)], $value)
2720 test "x$enable_rust" = "xyes" && value=1 || value=0
2721 PPRINT_PROP_BOOL([Rust support (--enable-rust)], $value)
2723 test "x$enable_cargo_online_mode" = "xyes" && value=1 || value=0
2724 PPRINT_PROP_BOOL([Cargo Online Fetch (--enable-cargo-online-mode)], $value)
2726 test "x$enable_android" = "xyes" && value=1 || value=0
2727 PPRINT_PROP_BOOL([Android support (--enable-android)], $value)
2730 PPRINT_SUBTITLE([Static Build])
2732 test "x$enable_static_tor" = "xyes" && value=1 || value=0
2733 PPRINT_PROP_BOOL([tor (--enable-static-tor)], $value)
2735 if test "x$enable_static_libevent" = "xyes"; then
2736 PPRINT_PROP_STRING([libevent], [$TOR_LIBDIR_libevent])
2738 PPRINT_PROP_BOOL([libevent (--enable-static-libevent)], $value)
2741 if test "x$enable_static_openssl" = "xyes"; then
2742 PPRINT_PROP_STRING([libssl], [$TOR_LIBDIR_openssl])
2744 PPRINT_PROP_BOOL([libssl (--enable-static-openssl)], $value)
2747 if test "x$enable_static_zlib" = "xyes"; then
2748 PPRINT_PROP_STRING([zlib1g], [$TOR_LIBDIR_zlib])
2750 PPRINT_PROP_BOOL([zlib1g (--enable-static-zlib)], $value)
2754 PPRINT_SUBTITLE([Optional Libraries])
2756 test "x$enable_nss" = "xyes" && value=1 || value=0
2757 PPRINT_PROP_BOOL([libnss (--enable-nss)], $value)
2759 test "x$enable_seccomp" != "xno" && value=1 || value=0
2760 PPRINT_PROP_BOOL([libseccomp (--disable-seccomp)], $value)
2762 test "x$enable_libscrypt" != "xno" && value=1 || value=0
2763 PPRINT_PROP_BOOL([libscrypt (--disable-libscrypt)], $value)
2765 test "x$enable_systemd" = "xyes" && value=1 || value=0
2766 PPRINT_PROP_BOOL([Systemd support (--enable-systemd)], $value)
2768 test "x$enable_lzma" = "xyes" && value=1 || value=0
2769 PPRINT_PROP_BOOL([liblzma (--enable-lzma)], $value)
2771 test "x$enable_zstd" = "xyes" && value=1 || value=0
2772 PPRINT_PROP_BOOL([libzstd (--enable-zstd)], $value)
2775 PPRINT_SUBTITLE([Hardening])
2777 test "x$enable_gcc_hardening" != "xno" && value=1 || value=0
2778 PPRINT_PROP_BOOL([Compiler Hardening (--disable-gcc-hardening)], $value)
2780 test "x$enable_linker_hardening" != "xno" && value=1 || value=0
2781 PPRINT_PROP_BOOL([Linker Hardening (--disable-linker-hardening)], $value)
2783 test "x$fragile_hardening" = "xyes" && value=1 || value=0
2784 PPRINT_PROP_BOOL([Fragile Hardening (--enable-fragile-hardening, dev only)], $value)
2787 PPRINT_SUBTITLE([Modules])
2789 m4_foreach_w([mname], MODULES,
2791 AM_COND_IF(m4_join([], [BUILD_MODULE_], m4_toupper([]mname[])), value=1, value=0)
2792 PPRINT_PROP_BOOL([mname (--disable-module-mname)], $value)
2797 PPRINT_SUBTITLE([Documentation])
2799 test "x$enable_asciidoc" != "xno" && value=1 || value=0
2800 PPRINT_PROP_BOOL([AsciiDoc (--disable-asciidoc)], $value)
2802 test "x$enable_manpage" != "xno" && value=1 || value=0
2803 PPRINT_PROP_BOOL([Man Pages (--disable-manpage)], $value)
2805 test "x$enable_html_manual" != "xno" && value=1 || value=0
2806 PPRINT_PROP_BOOL([HTML Manual (--disable-html-manual)], $value)
2809 PPRINT_SUBTITLE([Tests])
2811 test "x$enable_unittests" != "xno" && value=1 || value=0
2812 PPRINT_PROP_BOOL([Unit tests (--disable-unittests)], $value)
2814 test "x$enable_asserts_in_tests" = "xno" && value=1 || value=0
2815 PPRINT_PROP_BOOL([assert()s enabled (--enable-asserts-in-tests, dev only)], $value)
2817 test "x$enable_coverage" = "xyes" && value=1 || value=0
2818 PPRINT_PROP_BOOL([Code Coverage (--enable-coverage)], $value)
2820 test "x$enable_libfuzzer" = "xyes" && value=1 || value=0
2821 PPRINT_PROP_BOOL([libFuzzer support (--enable-libfuzzer)], $value)
2823 test "x$enable_oss_fuzz" = "xyes" && value=1 || value=0
2824 PPRINT_PROP_BOOL([OSS-Fuzz support (--enable-oss-fuzz)], $value)
2827 PPRINT_SUBTITLE([Tracing (--enable-tracing-instrumentation-<type>)])
2829 test "x$enable_tracing_instrumentation_log_debug" = "xyes" && value=1 || value=0
2830 PPRINT_PROP_BOOL([Tracepoints to log_debug() (log-debug)], $value)
2832 test "x$enable_tracing_instrumentation_usdt" = "xyes" && value=1 || value=0
2833 PPRINT_PROP_BOOL([USDT Instrumentation (usdt)], $value)
2835 test "x$enable_tracing_instrumentation_lttng" = "xyes" && value=1 || value=0
2836 PPRINT_PROP_BOOL([LTTng Instrumentation (lttng)], $value)
2839 PPRINT_SUBTITLE([Install Directories])
2841 report_mandir="`eval eval echo $mandir`"
2842 PPRINT_PROP_STRING([Binaries], [$BINDIR])
2843 PPRINT_PROP_STRING([Configuration], [$CONFDIR])
2844 PPRINT_PROP_STRING([Man Pages], [$report_mandir])
2847 AS_ECHO(["Configure Line: ./configure $configure_flags"])
2849 if test "$tor_ac_n_warnings" != "0"; then
2852 Encountered $tor_ac_n_warnings warning(s). See messages above for more info.