| blob | 7c62a286a433bfe78b482ff2b4fa81102326d1d5 |
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
6 AC_PREREQ([2.63])
7 AC_INIT([tor],[0.4.6.6-dev])
8 AC_CONFIG_SRCDIR([src/app/main/tor_main.c])
9 AC_CONFIG_MACRO_DIR([m4])
11 configure_flags="$*"
12 AC_DEFINE_UNQUOTED([CONFIG_FLAGS], ["$configure_flags"], [Flags passed to configure])
15 # DO NOT EDIT THIS DEFINITION BY HAND UNLESS YOU KNOW WHAT YOU'RE DOING.
16 #
17 # The update_versions.py script updates this definition when the
18 # version number changes. Tor uses it to make sure that it
19 # only shuts down for missing "required protocols" when those protocols
20 # are listed as required by a consensus after this date.
21 AC_DEFINE(APPROX_RELEASE_DATE, ["2021-06-30"], # for 0.4.6.6-dev
22 [Approximate date when this software was released. (Updated when the version changes.)])
24 # "foreign" means we don't follow GNU package layout standards
25 # "1.11" means we require automake version 1.11 or newer
26 # "subdir-objects" means put .o files in the same directory as the .c files
27 AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
29 tor_ac_n_warnings=0
30 tor_incr_n_warnings() {
31 tor_ac_n_warnings=`expr $tor_ac_n_warnings + 1`
32 }
34 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
35 AC_CONFIG_HEADERS([orconfig.h])
37 AC_USE_SYSTEM_EXTENSIONS
38 AC_CANONICAL_HOST
40 PKG_PROG_PKG_CONFIG
41 if test "x$PKG_CONFIG" = "x" ; then
42 pkg_config_user_action="install pkg-config, and check the PKG_CONFIG_PATH environment variable"
43 AC_MSG_NOTICE([Some libraries need pkg-config, including systemd, nss, lzma, zstd, and custom mallocs.])
44 AC_MSG_NOTICE([To use those libraries, $pkg_config_user_action.])
45 else
46 pkg_config_user_action="check the PKG_CONFIG_PATH environment variable"
47 fi
49 if test "x$PKG_CONFIG_PATH" = "x" && test "x$prefix" != "xNONE" && test "$host" != "$build"; then
50 export PKG_CONFIG_PATH=$prefix/lib/pkgconfig
51 AC_MSG_NOTICE([set PKG_CONFIG_PATH=$PKG_CONFIG_PATH to support cross-compiling])
52 fi
54 AC_ARG_ENABLE(openbsd-malloc,
55 AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only. Deprecated: see --with-malloc]))
56 AC_ARG_ENABLE(static-openssl,
57 AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
58 AC_ARG_ENABLE(static-libevent,
59 AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
60 AC_ARG_ENABLE(static-zlib,
61 AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
62 AC_ARG_ENABLE(static-tor,
63 AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
64 AC_ARG_ENABLE(unittests,
65 AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
66 AC_ARG_ENABLE(coverage,
67 AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
68 AC_ARG_ENABLE(asserts-in-tests,
69 AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
70 AC_ARG_ENABLE(system-torrc,
71 AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
72 AC_ARG_ENABLE(libfuzzer,
73 AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
74 AC_ARG_ENABLE(oss-fuzz,
75 AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
76 AC_ARG_ENABLE(memory-sentinels,
77 AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
78 AC_ARG_ENABLE(rust,
79 AS_HELP_STRING(--enable-rust, [enable rust integration]))
80 AC_ARG_ENABLE(cargo-online-mode,
81 AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
82 AC_ARG_ENABLE(restart-debugging,
83 AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
84 AC_ARG_ENABLE(zstd-advanced-apis,
85 AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
86 AC_ARG_ENABLE(nss,
87 AS_HELP_STRING(--enable-nss, [Use Mozilla's NSS TLS library. (EXPERIMENTAL)]))
88 AC_ARG_ENABLE(pic,
89 AS_HELP_STRING(--enable-pic, [Build Tor's binaries as position-independent code, suitable to link as a library.]))
91 AC_ARG_ENABLE(missing-doc-warnings,
92 AS_HELP_STRING(--enable-missing-doc-warnings, [Tell doxygen to warn about missing documentation. Makes doxygen warnings nonfatal.]))
94 if test "$enable_missing_doc_warnings" = "yes"; then
95 DOXYGEN_FATAL_WARNINGS=NO
96 DOXYGEN_WARN_ON_MISSING=YES
97 elif test "$enable_fatal_warnings" = "yes"; then
98 # Fatal warnings from doxygen are nice, but not if we're warning about
99 # missing documentation.
100 DOXYGEN_FATAL_WARNINGS=YES
101 DOXYGEN_WARN_ON_MISSING=NO
102 else
103 DOXYGEN_FATAL_WARNINGS=NO
104 DOXYGEN_WARN_ON_MISSING=NO
105 fi
106 AC_SUBST(DOXYGEN_FATAL_WARNINGS)
107 AC_SUBST(DOXYGEN_WARN_ON_MISSING)
109 if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
110 AC_MSG_ERROR([Can't disable assertions outside of coverage build])
111 fi
113 AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
114 AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
115 AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
116 AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
117 AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
118 AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
119 AM_CONDITIONAL(USE_NSS, test "x$enable_nss" = "xyes")
120 AM_CONDITIONAL(USE_OPENSSL, test "x$enable_nss" != "xyes")
122 if test "x$enable_nss" = "xyes"; then
123 AC_DEFINE(ENABLE_NSS, 1,
124 [Defined if we're building with NSS.])
125 else
126 AC_DEFINE(ENABLE_OPENSSL, 1,
127 [Defined if we're building with OpenSSL or LibreSSL])
128 fi
130 if test "$enable_static_tor" = "yes"; then
131 enable_static_libevent="yes";
132 enable_static_openssl="yes";
133 enable_static_zlib="yes";
134 TOR_STATIC_LDFLAGS="-static"
135 fi
136 AC_SUBST(TOR_STATIC_LDFLAGS)
138 if test "$enable_system_torrc" = "no"; then
139 AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
140 [Defined if we're not going to look for a torrc in SYSCONF])
141 fi
143 if test "$enable_memory_sentinels" = "no"; then
144 AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
145 [Defined if we're turning off memory safety code to look for bugs])
146 fi
148 AC_ARG_ENABLE(manpage,
149 AS_HELP_STRING(--disable-manpage, [Disable manpage generation.]))
151 AC_ARG_ENABLE(html-manual,
152 AS_HELP_STRING(--disable-html-manual, [Disable HTML documentation.]))
154 AC_ARG_ENABLE(asciidoc,
155 AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
156 [case "${enableval}" in
157 "yes") asciidoc=true ;;
158 "no") asciidoc=false ;;
159 *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
160 esac], [asciidoc=true])
162 # systemd notify support
163 AC_ARG_ENABLE(systemd,
164 AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
165 [case "${enableval}" in
166 "yes") systemd=true ;;
167 "no") systemd=false ;;
168 * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
169 esac], [systemd=auto])
171 if test "$enable_restart_debugging" = "yes"; then
172 AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
173 [Defined if we're building with support for in-process restart debugging.])
174 fi
176 if test "$enable_zstd_advanced_apis" != "no"; then
177 AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
178 [Defined if we're going to try to use zstd's "static-only" APIs.])
179 fi
181 # systemd support
182 if test "x$enable_systemd" = "xno"; then
183 have_systemd=no;
184 else
185 PKG_CHECK_MODULES(SYSTEMD,
186 [libsystemd-daemon],
187 have_systemd=yes,
188 have_systemd=no)
189 if test "x$have_systemd" = "xno"; then
190 AC_MSG_NOTICE([Okay, checking for systemd a different way...])
191 PKG_CHECK_MODULES(SYSTEMD,
192 [libsystemd],
193 have_systemd=yes,
194 have_systemd=no)
195 fi
196 fi
198 if test "x$have_systemd" = "xyes"; then
199 AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
200 TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
201 TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
202 PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
203 [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or greater])], [])
204 fi
205 AC_SUBST(TOR_SYSTEMD_CFLAGS)
206 AC_SUBST(TOR_SYSTEMD_LIBS)
208 if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
209 AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found, $pkg_config_user_action, or set SYSTEMD_CFLAGS and SYSTEMD_LIBS.])
210 fi
212 case "$host" in
213 *-*-solaris* )
214 AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
215 ;;
216 esac
218 AC_ARG_ENABLE(gcc-warnings,
219 AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
220 AC_ARG_ENABLE(fatal-warnings,
221 AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
222 AC_ARG_ENABLE(gcc-warnings-advisory,
223 AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
225 dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
226 AC_ARG_ENABLE(gcc-hardening,
227 AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
229 dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
230 AC_ARG_ENABLE(expensive-hardening,
231 AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
232 AC_ARG_ENABLE(fragile-hardening,
233 AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
234 if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
235 fragile_hardening="yes"
236 AC_DEFINE(DEBUG_SMARTLIST, 1, [Enable smartlist debugging])
237 fi
239 AC_ARG_ENABLE(all-bugs-are-fatal,
240 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]))
242 if test "x$enable_all_bugs_are_fatal" = "xyes"; then
243 AC_DEFINE(ALL_BUGS_ARE_FATAL, 1, [All assert failures are fatal])
244 fi
246 dnl Linker hardening options
247 dnl Currently these options are ELF specific - you can't use this with MacOSX
248 AC_ARG_ENABLE(linker-hardening,
249 AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
251 AC_ARG_ENABLE(local-appdata,
252 AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
253 if test "$enable_local_appdata" = "yes"; then
254 AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
255 [Defined if we default to host local appdata paths on Windows])
256 fi
258 AC_ARG_ENABLE(tool-name-check,
259 AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
261 AC_ARG_ENABLE(seccomp,
262 AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
264 AC_ARG_ENABLE(libscrypt,
265 AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
267 dnl --- Tracing Options. ---
269 TOR_TRACE_LIBS=
271 dnl LTTng instrumentation option.
272 AC_ARG_ENABLE(tracing-instrumentation-lttng,
273 AS_HELP_STRING([--enable-tracing-instrumentation-lttng],
274 [build with LTTng-UST instrumentation]))
275 AM_CONDITIONAL([USE_TRACING_INSTRUMENTATION_LTTNG],
276 [test "x$enable_tracing_instrumentation_lttng" = "xyes"])
278 if test "x$enable_tracing_instrumentation_lttng" = "xyes"; then
279 AC_CHECK_HEADERS([lttng/tracepoint.h], [],
280 [AC_MSG_ERROR([LTTng instrumentation headers not found.
281 On Debian, apt install liblttng-ust-dev"])], [])
282 AC_DEFINE([USE_TRACING_INSTRUMENTATION_LTTNG], [1], [Using LTTng instrumentation])
283 TOR_TRACE_LIBS="-llttng-ust -ldl"
284 have_tracing=1
285 fi
287 dnl USDT instrumentation option.
288 AC_ARG_ENABLE(tracing-instrumentation-usdt,
289 AS_HELP_STRING([--enable-tracing-instrumentation-usdt],
290 [build with tracing USDT instrumentation]))
291 AM_CONDITIONAL([USE_TRACING_INSTRUMENTATION_USDT],
292 [test "x$enable_tracing_instrumentation_usdt" = "xyes"])
294 if test "x$enable_tracing_instrumentation_usdt" = "xyes"; then
295 AC_CHECK_HEADERS([sys/sdt.h], [],
296 [AC_MSG_ERROR([USDT instrumentation requires sys/sdt.h header.
297 On Debian, apt install systemtap-sdt-dev])], [])
298 AC_MSG_CHECKING([STAP_PROBEV()])
299 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
300 #define SDT_USE_VARIADIC
301 #include <sys/sdt.h>
302 void test(void)
303 {
304 STAP_PROBEV(p, n, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
305 }
306 ]])], [
307 AC_MSG_RESULT([yes])
308 dnl LTTng generates USDT probes if the UST library was built with
309 dnl --with-sdt. There is unfortunately no way to check that so we always
310 dnl build the USDT probes even though LTTng instrumentation was requested.
311 AC_DEFINE([USE_TRACING_INSTRUMENTATION_USDT], [1], [Using USDT instrumentation])
312 have_tracing=1
313 ], [
314 AC_MSG_RESULT([no])
315 AC_MSG_ERROR([USDT tracing support requires STAP_PROBEV()])
316 ])
317 fi
319 dnl Tracepoints event to debug logs.
320 AC_ARG_ENABLE(tracing-instrumentation-log-debug,
321 AS_HELP_STRING([--enable-tracing-instrumentation-log-debug],
322 [build with tracing event to debug log]),
323 AC_DEFINE([USE_TRACING_INSTRUMENTATION_LOG_DEBUG], [1],
324 [Tracepoints to log debug]), [])
325 AM_CONDITIONAL([USE_TRACING_INSTRUMENTATION_LOG_DEBUG],
326 [test "x$enable_tracing_instrumentation_log_debug" = "xyes"])
327 if test "x$enable_tracing_instrumentation_log_debug" = "xyes"; then
328 have_tracing=1
329 fi
331 dnl Define that tracing is supported if any instrumentation is used.
332 AM_COND_IF([USE_TRACING_INSTRUMENTATION_LOG_DEBUG],
333 AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
334 AM_COND_IF([USE_TRACING_INSTRUMENTATION_USDT],
335 AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
336 AM_COND_IF([USE_TRACING_INSTRUMENTATION_LTTNG],
337 AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
338 AM_CONDITIONAL([USE_TRACING], [test "x$have_tracing" = x1 ])
340 dnl Finally, define the trace libs.
341 AC_SUBST([TOR_TRACE_LIBS])
343 dnl -- End Tracing Options. --
345 dnl Enable Android only features.
346 AC_ARG_ENABLE(android,
347 AS_HELP_STRING(--enable-android, [build with Android features enabled]))
348 AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
350 if test "x$enable_android" = "xyes"; then
351 AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
353 fi
355 dnl ---
356 dnl Tor modules options. These options are namespaced with --disable-module-XXX
357 dnl ---
359 dnl All our modules.
360 m4_define(MODULES, relay dirauth dircache)
362 # Some modules are only disabled through another option. For those, we don't
363 # want to print the help in the summary at the end of the configure. Any entry
364 # in the following set will not print the "--disable-module-NAME" command in
365 # the summary.
366 m4_set_add_all([MODULES_WITH_NO_OPTIONS], [dircache])
368 dnl Relay module.
369 AC_ARG_ENABLE([module-relay],
370 AS_HELP_STRING([--disable-module-relay],
371 [Build tor without the Relay modules: tor can not run as a relay, bridge, or authority. Implies --disable-module-dirauth]))
372 AM_CONDITIONAL(BUILD_MODULE_RELAY, [test "x$enable_module_relay" != "xno"])
373 AM_COND_IF(BUILD_MODULE_RELAY,
374 AC_DEFINE([HAVE_MODULE_RELAY], [1],
375 [Compile with Relay feature support]))
377 dnl Dircache module. (This cannot be enabled or disabled independently of
378 dnl the relay module. It is not listed by --list-modules for this reason.)
379 AM_CONDITIONAL(BUILD_MODULE_DIRCACHE,
380 [test "x$enable_module_relay" != "xno"])
381 AM_COND_IF(BUILD_MODULE_DIRCACHE,
382 AC_DEFINE([HAVE_MODULE_DIRCACHE], [1],
383 [Compile with directory cache support]))
385 dnl Directory Authority module.
386 AC_ARG_ENABLE([module-dirauth],
387 AS_HELP_STRING([--disable-module-dirauth],
388 [Build tor without the Directory Authority module: tor can not run as a directory authority or bridge authority]))
389 AM_CONDITIONAL(BUILD_MODULE_DIRAUTH,[test "x$enable_module_dirauth" != "xno" && test "x$enable_module_relay" != "xno"])
390 AM_COND_IF(BUILD_MODULE_DIRAUTH,
391 AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
392 [Compile with Directory Authority feature support]))
394 dnl Helper variables.
395 TOR_MODULES_ALL_ENABLED=
396 AC_DEFUN([ADD_MODULE], [
397 MODULE=m4_toupper($1)
398 TOR_MODULES_ALL_ENABLED="${TOR_MODULES_ALL_ENABLED} -DHAVE_MODULE_${MODULE}=1"
399 ])
400 m4_foreach_w([module], MODULES, [ADD_MODULE([module])])
401 AC_SUBST(TOR_MODULES_ALL_ENABLED)
403 dnl check for the correct "ar" when cross-compiling.
404 dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
405 dnl so kludge up a replacement for the case where it isn't there yet.)
406 m4_ifdef([AM_PROG_AR],
407 [AM_PROG_AR],
408 [AN_MAKEVAR([AR], [AC_PROG_AR])
409 AN_PROGRAM([ar], [AC_PROG_AR])
410 AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
411 AC_PROG_AR])
413 dnl Check whether the above macro has settled for a simply named tool even
414 dnl though we're cross compiling. We must do this before running AC_PROG_CC,
415 dnl because that will find any cc on the system, not only the cross-compiler,
416 dnl and then verify that a binary built with this compiler runs on the
417 dnl build system. It will then come to the false conclusion that we're not
418 dnl cross-compiling.
419 if test "x$enable_tool_name_check" != "xno"; then
420 if test "x$ac_tool_warned" = "xyes"; then
421 AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
422 elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
423 AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
424 fi
425 fi
427 AC_PROG_CC
428 AC_PROG_CPP
429 AC_PROG_MAKE_SET
430 AC_PROG_RANLIB
431 AC_PROG_SED
433 AX_COMPILER_VERSION
434 AX_COMPILER_VENDOR
436 AC_DEFINE_UNQUOTED([COMPILER_VERSION],["$ax_cv_c_compiler_version"], [Compiler version])
437 AC_DEFINE_UNQUOTED([COMPILER_VENDOR],["$ax_cv_c_compiler_vendor"], [Compiler vendor])
439 AS_CASE($ax_cv_c_compiler_vendor,
440 [gnu], AC_DEFINE([COMPILER],["GCC"],[Compiler name]),
441 AC_DEFINE([COMPILER],[],[Compiler name])
442 )
444 AC_ARG_VAR([PERL], [path to Perl binary])
445 AC_CHECK_PROGS([PERL], [perl])
446 AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
448 dnl check for asciidoc and a2x
449 AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
450 AC_PATH_PROGS([A2X], [a2x a2x.py], none)
452 AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
453 AM_CONDITIONAL(BUILD_MANPAGE, [test "x$enable_manpage" != "xno"])
454 AM_CONDITIONAL(BUILD_HTML_DOCS, [test "x$enable_html_manual" != "xno"])
456 AM_PROG_CC_C_O
458 dnl Before autoconf 2.70, AC_PROG_CC_C99 is supposedly necessary for some
459 dnl compilers if you wan't C99 support. Starting with 2.70, it is obsolete and
460 dnl forbidden.
461 m4_version_prereq([2.70], [:], [AC_PROG_CC_C99])
463 AC_CACHE_CHECK([for Python 3], [tor_cv_PYTHON],
464 [AC_PATH_PROGS_FEATURE_CHECK([PYTHON], [ \
465 python3 \
466 python3.8 python3.7 python3.6 python3.5 python3.4 \
467 python ],
468 [["$ac_path_PYTHON" -c 'import sys; sys.exit(sys.version_info[0]<3)' && tor_cv_PYTHON="$ac_path_PYTHON" ac_path_PYTHON_found=:]] )])
469 AC_SUBST([PYTHON], [$tor_cv_PYTHON])
471 PYTHON="$tor_cv_PYTHON"
473 if test "x$PYTHON" = "x"; then
474 tor_incr_n_warnings
475 AC_MSG_WARN([Python 3 unavailable; some tests will not be run.])
476 fi
478 AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
480 dnl List all external rust crates we depend on here. Include the version
481 rust_crates=" \
482 digest-0.7.2 \
483 libc-0.2.39 \
484 "
485 AC_SUBST(rust_crates)
487 ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
488 AC_C_FLEXIBLE_ARRAY_MEMBER
489 ], [
490 dnl Maybe we've got an old autoconf...
491 AC_CACHE_CHECK([for flexible array members],
492 tor_cv_c_flexarray,
493 [AC_COMPILE_IFELSE(
494 AC_LANG_PROGRAM([
495 struct abc { int a; char b[]; };
496 ], [
497 struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
498 def->b[0] = 33;
499 ]),
500 [tor_cv_c_flexarray=yes],
501 [tor_cv_c_flexarray=no])])
502 if test "$tor_cv_flexarray" = "yes"; then
503 AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
504 else
505 AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
506 fi
507 ])
509 AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
510 tor_cv_c_c99_decl,
511 [AC_COMPILE_IFELSE(
512 [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
513 [tor_cv_c_c99_decl=yes],
514 [tor_cv_c_c99_decl=no] )])
515 if test "$tor_cv_c_c99_decl" != "yes"; then
516 AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
517 fi
519 AC_CACHE_CHECK([for working C99 designated initializers],
520 tor_cv_c_c99_designated_init,
521 [AC_COMPILE_IFELSE(
522 [AC_LANG_PROGRAM([struct s { int a; int b; };],
523 [[ struct s ss = { .b = 5, .a = 6 }; ]])],
524 [tor_cv_c_c99_designated_init=yes],
525 [tor_cv_c_c99_designated_init=no] )])
527 if test "$tor_cv_c_c99_designated_init" != "yes"; then
528 AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
529 fi
531 saved_CFLAGS="$CFLAGS"
532 CFLAGS="$CFLAGS -Werror"
533 AC_CACHE_CHECK([for __attribute__((fallthrough))],
534 tor_cv_c_attr_fallthrough,
535 [AC_COMPILE_IFELSE(
536 [AC_LANG_PROGRAM([extern int x; void fn(void) ;],
537 [[ switch (x) { case 1: fn(); __attribute__((fallthrough));
538 case 2: fn(); break; } ]])],
539 [tor_cv_c_attr_fallthrough=yes],
540 [tor_cv_c_attr_fallthrough=no] )])
541 CFLAGS="$saved_CFLAGS"
543 if test "$tor_cv_c_attr_fallthrough" = "yes"; then
544 AC_DEFINE(HAVE_ATTR_FALLTHROUGH, [1], [defined if we have the fallthrough attribute.])
545 fi
547 TORUSER=_tor
548 AC_ARG_WITH(tor-user,
549 AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
550 [
551 TORUSER=$withval
552 ]
553 )
554 AC_SUBST(TORUSER)
556 TORGROUP=_tor
557 AC_ARG_WITH(tor-group,
558 AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
559 [
560 TORGROUP=$withval
561 ]
562 )
563 AC_SUBST(TORGROUP)
566 dnl If _WIN32 is defined and non-zero, we are building for win32
567 AC_MSG_CHECKING([for win32])
568 AC_RUN_IFELSE([AC_LANG_SOURCE([
569 int main(int c, char **v) {
570 #ifdef _WIN32
571 #if _WIN32
572 return 0;
573 #else
574 return 1;
575 #endif
576 #else
577 return 2;
578 #endif
579 }])],
580 bwin32=true; AC_MSG_RESULT([yes]),
581 bwin32=false; AC_MSG_RESULT([no]),
582 bwin32=cross; AC_MSG_RESULT([cross])
583 )
585 if test "$bwin32" = "cross"; then
586 AC_MSG_CHECKING([for win32 (cross)])
587 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
588 #ifdef _WIN32
589 int main(int c, char **v) {return 0;}
590 #else
591 #error
592 int main(int c, char **v) {return x(y);}
593 #endif
594 ])],
595 bwin32=true; AC_MSG_RESULT([yes]),
596 bwin32=false; AC_MSG_RESULT([no]))
597 fi
599 AH_BOTTOM([
600 #ifdef _WIN32
601 /* Defined to access windows functions and definitions for >=WinVista */
602 # ifndef WINVER
603 # define WINVER 0x0600
604 # endif
606 /* Defined to access _other_ windows functions and definitions for >=WinVista */
607 # ifndef _WIN32_WINNT
608 # define _WIN32_WINNT 0x0600
609 # endif
611 /* Defined to avoid including some windows headers as part of Windows.h */
612 # ifndef WIN32_LEAN_AND_MEAN
613 # define WIN32_LEAN_AND_MEAN 1
614 # endif
615 #endif
616 ])
618 AM_CONDITIONAL(WIN32, test "x$bwin32" = "xtrue")
619 AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
620 AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
622 dnl Enable C99 when compiling with MIPSpro
623 AC_MSG_CHECKING([for MIPSpro compiler])
624 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
625 #if (defined(__sgi) && defined(_COMPILER_VERSION))
626 #error
627 return x(y);
628 #endif
629 ])],
630 bmipspro=false; AC_MSG_RESULT(no),
631 bmipspro=true; AC_MSG_RESULT(yes))
633 if test "$bmipspro" = "true"; then
634 CFLAGS="$CFLAGS -c99"
635 fi
637 AC_C_BIGENDIAN
639 AC_ARG_VAR([TOR_RUST_TARGET], [Rust target, must be specified when cross-compiling (HOST != BUILD). example: i686-pc-windows-gnu])
641 if test "x$enable_rust" = "xyes"; then
642 AC_ARG_VAR([RUSTC], [path to the rustc binary])
643 AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
644 if test "x$RUSTC" = "xno"; then
645 AC_MSG_ERROR([rustc unavailable but rust integration requested.])
646 fi
648 AC_ARG_VAR([CARGO], [path to the cargo binary])
649 AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
650 if test "x$CARGO" = "xno"; then
651 AC_MSG_ERROR([cargo unavailable but rust integration requested.])
652 fi
654 AC_DEFINE([HAVE_RUST], 1, [have Rust])
655 if test "x$enable_fatal_warnings" = "xyes"; then
656 RUST_WARN=
657 else
658 RUST_WARN=#
659 fi
660 if test "x$enable_cargo_online_mode" = "xyes"; then
661 CARGO_ONLINE=
662 RUST_DL=#
663 else
664 CARGO_ONLINE=--frozen
665 RUST_DL=
667 dnl When we're not allowed to touch the network, we need crate dependencies
668 dnl locally available.
669 AC_MSG_CHECKING([rust crate dependencies])
670 AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
671 if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
672 TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
673 fi
674 dnl Check whether the path exists before we try to cd into it.
675 if test ! -d "$TOR_RUST_DEPENDENCIES"; then
676 AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
677 ERRORED=1
678 fi
679 dnl Make the path absolute, since we'll be using it from within a
680 dnl subdirectory.
681 TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
683 for dep in $rust_crates; do
684 if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
685 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.])
686 ERRORED=1
687 fi
688 done
689 if test "x$ERRORED" = "x"; then
690 AC_MSG_RESULT([yes])
691 fi
692 fi
694 dnl For now both MSVC and MinGW rust libraries will output static libs with
695 dnl the MSVC naming convention.
696 if test "$bwin32" = "true"; then
697 tor_rust_static_name=tor_rust.lib
698 else
699 tor_rust_static_name=libtor_rust.a
700 fi
702 AC_CANONICAL_BUILD
704 if test -n "$TOR_RUST_TARGET"; then
705 if test "$host" = "$build"; then
706 AC_MSG_ERROR([HOST = BUILD is invalid if TOR_RUST_TARGET is specified, see configure --help for more information.])
707 fi
708 RUST_TARGET_PROP="target = '$TOR_RUST_TARGET'"
709 TOR_RUST_LIB_PATH="src/rust/target/$TOR_RUST_TARGET/release/$tor_rust_static_name"
710 else
711 if test "$host" != "$build"; then
712 AC_MSG_ERROR([TOR_RUST_TARGET must be specified when cross-compiling with Rust enabled.])
713 fi
714 RUST_TARGET_PROP=
715 TOR_RUST_LIB_PATH="src/rust/target/release/$tor_rust_static_name"
716 fi
718 AC_SUBST(RUST_TARGET_PROP)
719 AC_SUBST(TOR_RUST_LIB_PATH)
720 AC_SUBST(CARGO_ONLINE)
721 AC_SUBST(RUST_WARN)
722 AC_SUBST(RUST_DL)
724 dnl Let's check the rustc version, too
725 AC_MSG_CHECKING([rust version])
726 RUSTC_VERSION=`$RUSTC --version`
727 RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
728 RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
729 if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
730 AC_MSG_ERROR([rustc version couldn't be identified])
731 fi
732 if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 31; then
733 AC_MSG_ERROR([rustc must be at least version 1.31.0])
734 fi
735 AC_MSG_RESULT([$RUSTC_VERSION])
736 fi
738 AC_SEARCH_LIBS(socket, [socket network])
739 AC_SEARCH_LIBS(gethostbyname, [nsl])
740 AC_SEARCH_LIBS(dlopen, [dl])
741 AC_SEARCH_LIBS(inet_aton, [resolv])
742 AC_SEARCH_LIBS(backtrace, [execinfo])
743 saved_LIBS="$LIBS"
744 AC_SEARCH_LIBS([clock_gettime], [rt])
745 if test "$LIBS" != "$saved_LIBS"; then
746 # Looks like we need -lrt for clock_gettime().
747 have_rt=yes
748 fi
750 if test "$bwin32" = "false"; then
751 AC_SEARCH_LIBS(pthread_create, [pthread])
752 AC_SEARCH_LIBS(pthread_detach, [pthread])
753 fi
755 AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
756 AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
758 AC_CHECK_FUNCS(
759 _NSGetEnviron \
760 RtlSecureZeroMemory \
761 SecureZeroMemory \
762 accept4 \
763 backtrace \
764 backtrace_symbols_fd \
765 eventfd \
766 explicit_bzero \
767 timingsafe_memcmp \
768 flock \
769 fsync \
770 ftime \
771 get_current_dir_name \
772 getaddrinfo \
773 getdelim \
774 getifaddrs \
775 getline \
776 getrlimit \
777 gettimeofday \
778 gmtime_r \
779 gnu_get_libc_version \
780 inet_aton \
781 ioctl \
782 issetugid \
783 llround \
784 localtime_r \
785 lround \
786 madvise \
787 memmem \
788 memset_s \
789 minherit \
790 mmap \
791 pipe \
792 pipe2 \
793 prctl \
794 readpassphrase \
795 rint \
796 sigaction \
797 socketpair \
798 statvfs \
799 strncasecmp \
800 strcasecmp \
801 strlcat \
802 strlcpy \
803 strnlen \
804 strptime \
805 strtok_r \
806 strtoull \
807 sysconf \
808 sysctl \
809 timegm \
810 truncate \
811 uname \
812 usleep \
813 vasprintf \
814 _vscprintf
815 )
817 # Apple messed up when they added some functions: they
818 # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
819 # checks.
821 # We should only probe for these functions if we are sure that we
822 # are not targeting OS X 10.9 or earlier.
823 AC_MSG_CHECKING([for a pre-Yosemite OS X build target])
824 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
825 #ifdef __APPLE__
826 # include <AvailabilityMacros.h>
827 # ifndef MAC_OS_X_VERSION_10_10
828 # define MAC_OS_X_VERSION_10_10 101000
829 # endif
830 # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
831 # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
832 # error "Running on Mac OS X 10.9 or earlier"
833 # endif
834 # endif
835 #endif
836 ]], [[]])],
837 [on_macos_pre_10_10=no ; AC_MSG_RESULT([no])],
838 [on_macos_pre_10_10=yes; AC_MSG_RESULT([yes])])
840 if test "$on_macos_pre_10_10" = "no"; then
841 AC_CHECK_FUNCS(
842 mach_approximate_time \
843 )
844 fi
846 # We should only probe for these functions if we are sure that we
847 # are not targeting OSX 10.11 or earlier.
848 AC_MSG_CHECKING([for a pre-Sierra OSX build target])
849 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
850 #ifdef __APPLE__
851 # include <AvailabilityMacros.h>
852 # ifndef MAC_OS_X_VERSION_10_12
853 # define MAC_OS_X_VERSION_10_12 101200
854 # endif
855 # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
856 # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
857 # error "Running on Mac OSX 10.11 or earlier"
858 # endif
859 # endif
860 #endif
861 ]], [[]])],
862 [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
863 [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
865 if test "$on_macos_pre_10_12" = "no"; then
866 AC_CHECK_FUNCS(
867 clock_gettime \
868 getentropy \
869 )
870 fi
872 if test "$bwin32" != "true"; then
873 AC_CHECK_HEADERS(pthread.h)
874 AC_CHECK_FUNCS(pthread_create)
875 AC_CHECK_FUNCS(pthread_condattr_setclock)
876 fi
878 if test "$bwin32" = "true"; then
879 AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
880 #include <windows.h>
881 #include <conio.h>
882 #include <wchar.h>
883 ])
884 fi
886 AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
887 test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
889 AC_CHECK_FUNCS(glob)
891 AC_MSG_CHECKING([whether free(NULL) works])
892 AC_RUN_IFELSE([AC_LANG_PROGRAM([
893 #include <stdlib.h>
894 ], [
895 char *p = NULL;
896 free(p);
897 ])],
898 [free_null_ok=true; AC_MSG_RESULT(yes)],
899 [free_null_ok=false; AC_MSG_RESULT(no)],
900 [free_null_ok=cross; AC_MSG_RESULT(cross)])
902 if test "$free_null_ok" = "false"; then
903 AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
904 fi
906 dnl ------------------------------------------------------
907 dnl Where do you live, libevent? And how do we call you?
909 if test "$bwin32" = "true"; then
910 TOR_LIB_WS32=-lws2_32
911 TOR_LIB_IPHLPAPI=-liphlpapi
912 TOR_LIB_SHLWAPI=-lshlwapi
913 # Some of the cargo-cults recommend -lwsock32 as well, but I don't
914 # think it's actually necessary.
915 TOR_LIB_GDI=-lgdi32
916 TOR_LIB_USERENV=-luserenv
917 TOR_LIB_BCRYPT=-lbcrypt
918 TOR_LIB_CRYPT32=-lcrypt32
919 else
920 TOR_LIB_WS32=
921 TOR_LIB_GDI=
922 TOR_LIB_USERENV=
923 fi
924 AC_SUBST(TOR_LIB_WS32)
925 AC_SUBST(TOR_LIB_GDI)
926 AC_SUBST(TOR_LIB_IPHLPAPI)
927 AC_SUBST(TOR_LIB_BCRYPT)
928 AC_SUBST(TOR_LIB_CRYPT32)
929 AC_SUBST(TOR_LIB_SHLWAPI)
930 AC_SUBST(TOR_LIB_USERENV)
932 tor_libevent_pkg_redhat="libevent"
933 tor_libevent_pkg_debian="libevent-dev"
934 tor_libevent_devpkg_redhat="libevent-devel"
935 tor_libevent_devpkg_debian="libevent-dev"
937 dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
938 dnl linking for static builds.
939 STATIC_LIBEVENT_FLAGS=""
940 if test "$enable_static_libevent" = "yes"; then
941 if test "$have_rt" = "yes"; then
942 STATIC_LIBEVENT_FLAGS=" -lrt "
943 fi
944 fi
946 TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_IPHLPAPI $TOR_LIB_BCRYPT $TOR_LIB_WS32], [
947 #ifdef _WIN32
948 #include <winsock2.h>
949 #endif
950 #include <sys/time.h>
951 #include <sys/types.h>
952 #include <event2/event.h>], [
953 #ifdef _WIN32
954 #include <winsock2.h>
955 #endif
956 struct event_base;
957 struct event_base *event_base_new(void);
958 void event_base_free(struct event_base *);],
959 [
960 #ifdef _WIN32
961 {WSADATA d; WSAStartup(0x101,&d); }
962 #endif
963 event_base_free(event_base_new());
964 ], [--with-libevent-dir], [/opt/libevent])
966 dnl Determine the incantation needed to link libevent.
967 save_LIBS="$LIBS"
968 save_LDFLAGS="$LDFLAGS"
969 save_CPPFLAGS="$CPPFLAGS"
971 LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
972 LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
973 CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
975 AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
977 if test "$enable_static_libevent" = "yes"; then
978 if test "$tor_cv_library_libevent_dir" = "(system)"; then
979 AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
980 else
981 TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
982 fi
983 else
984 if test "x$ac_cv_header_event2_event_h" = "xyes"; then
985 AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
986 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"))
988 if test "$ac_cv_search_event_new" != "none required"; then
989 TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
990 fi
991 if test "$ac_cv_search_evdns_base_new" != "none required"; then
992 TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
993 fi
994 else
995 AC_MSG_ERROR("libevent2 is required but the headers could not be found")
996 fi
997 fi
999 dnl Now check for particular libevent functions.
1000 AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
1001 evutil_secure_rng_add_bytes \
1002 evdns_base_get_nameserver_addr \
1004 ])
1006 LIBS="$save_LIBS"
1007 LDFLAGS="$save_LDFLAGS"
1008 CPPFLAGS="$save_CPPFLAGS"
1010 dnl Check that libevent is at least at version 2.0.10, the first stable
1011 dnl release of its series
1012 CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
1013 AC_MSG_CHECKING([whether Libevent is new enough])
1014 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
1015 #include <event2/event.h>
1016 #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
1017 #error
1018 int x = y(zz);
1019 #else
1020 int x = 1;
1021 #endif
1022 ])], [ AC_MSG_RESULT([yes]) ],
1023 [ AC_MSG_RESULT([no])
1024 AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
1026 LIBS="$save_LIBS"
1027 LDFLAGS="$save_LDFLAGS"
1028 CPPFLAGS="$save_CPPFLAGS"
1030 AC_SUBST(TOR_LIBEVENT_LIBS)
1032 dnl ------------------------------------------------------
1033 dnl Where do you live, libm?
1035 dnl On some platforms (Haiku/BeOS) the math library is
1036 dnl part of libroot. In which case don't link against lm
1037 TOR_LIB_MATH=""
1038 save_LIBS="$LIBS"
1039 AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
1040 if test "$ac_cv_search_pow" != "none required"; then
1041 TOR_LIB_MATH="$ac_cv_search_pow"
1042 fi
1043 LIBS="$save_LIBS"
1044 AC_SUBST(TOR_LIB_MATH)
1046 dnl ------------------------------------------------------
1047 dnl Hello, NSS. You're new around here.
1048 if test "x$enable_nss" = "xyes"; then
1049 PKG_CHECK_MODULES(NSS,
1050 [nss],
1051 [have_nss=yes],
1052 [have_nss=no; AC_MSG_ERROR([You asked for NSS but I can't find it, $pkg_config_user_action, or set NSS_CFLAGS and NSS_LIBS.])])
1053 AC_SUBST(NSS_CFLAGS)
1054 AC_SUBST(NSS_LIBS)
1055 fi
1057 dnl ------------------------------------------------------
1058 dnl Where do you live, openssl? And how do we call you?
1060 if test "x$enable_nss" != "xyes"; then
1062 tor_openssl_pkg_redhat="openssl"
1063 tor_openssl_pkg_debian="libssl-dev"
1064 tor_openssl_devpkg_redhat="openssl-devel"
1065 tor_openssl_devpkg_debian="libssl-dev"
1067 ALT_openssl_WITHVAL=""
1068 AC_ARG_WITH(ssl-dir,
1069 AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
1070 [
1071 if test "x$withval" != "xno" && test "x$withval" != "x"; then
1072 ALT_openssl_WITHVAL="$withval"
1073 fi
1074 ])
1076 AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
1077 TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32 $TOR_LIB_CRYPT32],
1078 [#include <openssl/ssl.h>
1079 char *getenv(const char *);],
1080 [struct ssl_cipher_st;
1081 unsigned SSL_CIPHER_get_id(const struct ssl_cipher_st *);
1082 char *getenv(const char *);],
1083 dnl This funny-looking test program calls getenv, so that the compiler
1084 dnl will neither make code that call SSL_CIPHER_get_id(NULL) [producing
1085 dnl a crash], nor optimize out the call to SSL_CIPHER_get_id().
1086 dnl We look for SSL_cipher_get_id() because it is present in
1087 dnl OpenSSL >=1.0.1, because it is not deprecated, and because Tor
1088 dnl depends on it.
1089 [if (getenv("THIS_SHOULDNT_BE_SET_X201803")) SSL_CIPHER_get_id((void *)0);], [],
1090 [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
1092 if test "$enable_static_openssl" = "yes"; then
1093 if test "$tor_cv_library_openssl_dir" = "(system)"; then
1094 AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
1095 else
1096 TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a $TOR_LIB_WS32 $TOR_LIB_CRYPT32 $TOR_LIB_BCRYPT"
1097 fi
1098 else
1099 TOR_OPENSSL_LIBS="-lssl -lcrypto"
1100 fi
1101 AC_SUBST(TOR_OPENSSL_LIBS)
1103 dnl Now validate openssl, and check for particular openssl functions.
1104 save_LIBS="$LIBS"
1105 save_LDFLAGS="$LDFLAGS"
1106 save_CPPFLAGS="$CPPFLAGS"
1107 LIBS="$TOR_OPENSSL_LIBS $LIBS"
1108 LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
1109 CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
1111 dnl Tor currently uses a number of APIs that are deprecated in OpenSSL 3.0.0
1112 dnl and later. We want to migrate away from them, but that will be a lot of
1113 dnl work. (See ticket tor#40166.) For now, we disable the deprecation
1114 dnl warnings.
1116 AC_MSG_CHECKING([for OpenSSL >= 3.0.0])
1117 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1118 #include <openssl/opensslv.h>
1119 #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER <= 0x30000000L
1120 #error "you_have_version_3"
1121 #endif
1122 ]], [[]])],
1123 [ AC_MSG_RESULT([no]) ],
1124 [ AC_MSG_RESULT([yes]);
1125 AC_DEFINE(OPENSSL_SUPPRESS_DEPRECATED, 1, [disable openssl deprecated-function warnings]) ])
1127 AC_MSG_CHECKING([for OpenSSL < 1.0.1])
1128 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1129 #include <openssl/opensslv.h>
1130 #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
1131 #error "too old"
1132 #endif
1133 ]], [[]])],
1134 [ AC_MSG_RESULT([no]) ],
1135 [ 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.]) ])
1137 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1138 #include <openssl/opensslv.h>
1139 #include <openssl/evp.h>
1140 #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
1141 #error "no ECC"
1142 #endif
1143 #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
1144 #error "curves unavailable"
1145 #endif
1146 ]], [[]])],
1147 [ : ],
1148 [ 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.]) ])
1150 dnl Let's see if we have a version mismatch between includes and libs.
1151 AC_MSG_CHECKING([for significant mismatch between openssl headers and libraries])
1152 ac_retval=foo
1153 AC_RUN_IFELSE([AC_LANG_SOURCE([AC_LANG_PROGRAM([[
1154 #include <openssl/opensslv.h>
1155 #include <openssl/crypto.h>
1156 ]], [[
1157 /* Include major, minor, and fix, but not patch or status. */
1158 unsigned long mask = 0xfffff000;
1159 unsigned long linking = OpenSSL_version_num() & mask;
1160 unsigned long running = OPENSSL_VERSION_NUMBER & mask;
1161 return !(linking==running);
1162 ]])])], [openssl_ver_mismatch=no], [
1163 # This is a kludge to figure out whether compilation failed, or whether
1164 # running the program failed.
1165 if test "$ac_retval" = "1"; then
1166 openssl_ver_mismatch=inconclusive
1167 else
1168 openssl_ver_mismatch=yes
1169 fi], [openssl_ver_mismatch=cross])
1170 AC_MSG_RESULT([$openssl_ver_mismatch])
1172 AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
1173 [#include <openssl/ssl.h>
1174 ])
1176 dnl OpenSSL functions which we might not have. In theory, we could just
1177 dnl check the openssl version number, but in practice that gets pretty
1178 dnl confusing with LibreSSL, OpenSSL, and various distributions' patches
1179 dnl to them.
1180 AC_CHECK_FUNCS([ \
1181 ERR_load_KDF_strings \
1182 EVP_PBE_scrypt \
1183 SSL_CIPHER_find \
1184 SSL_CTX_set1_groups_list \
1185 SSL_CTX_set_security_level \
1186 SSL_SESSION_get_master_key \
1187 SSL_get_client_ciphers \
1188 SSL_get_client_random \
1189 SSL_get_server_random \
1190 TLS_method \
1191 ])
1193 dnl Check if OpenSSL structures are opaque
1194 AC_CHECK_MEMBERS([SSL.state], , ,
1195 [#include <openssl/ssl.h>
1196 ])
1198 AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
1199 #include <openssl/sha.h>
1200 ])
1202 fi # enable_nss
1204 dnl We will someday make KECCAK_TINY optional, but for now we still need
1205 dnl it for SHAKE, since OpenSSL's SHAKE can't be squeezed more than
1206 dnl once. See comment in the definition of crypto_xof_t.
1208 dnl AM_CONDITIONAL(BUILD_KECCAK_TINY,
1209 dnl test "x$ac_cv_func_EVP_sha3_256" != "xyes")
1211 AM_CONDITIONAL(BUILD_KECCAK_TINY, true)
1213 dnl ======================================================================
1214 dnl Can we use KIST?
1216 dnl Define the set of checks for KIST scheduler support.
1217 AC_DEFUN([CHECK_KIST_SUPPORT],[
1218 dnl KIST needs struct tcp_info and for certain members to exist.
1219 AC_CHECK_MEMBERS(
1220 [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
1221 , ,[[#include <netinet/tcp.h>]])
1222 dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
1223 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
1224 #include <linux/sockios.h>
1225 #ifndef SIOCOUTQNSD
1226 #error
1227 #endif
1228 ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
1229 if test "x$have_siocoutqnsd" = "xyes"; then
1230 if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
1231 if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
1232 have_kist_support=yes
1233 fi
1234 fi
1235 fi
1236 ])
1237 dnl Now, trigger the check.
1238 CHECK_KIST_SUPPORT
1239 AS_IF([test "x$have_kist_support" = "xyes"],
1240 [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
1241 on this system])],
1242 [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
1244 LIBS="$save_LIBS"
1245 LDFLAGS="$save_LDFLAGS"
1246 CPPFLAGS="$save_CPPFLAGS"
1248 dnl ------------------------------------------------------
1249 dnl Where do you live, zlib? And how do we call you?
1251 tor_zlib_pkg_redhat="zlib"
1252 tor_zlib_pkg_debian="zlib1g"
1253 tor_zlib_devpkg_redhat="zlib-devel"
1254 tor_zlib_devpkg_debian="zlib1g-dev"
1256 TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
1257 [#include <zlib.h>],
1258 [const char * zlibVersion(void);],
1259 [zlibVersion();], [--with-zlib-dir],
1260 [/opt/zlib])
1262 if test "$enable_static_zlib" = "yes"; then
1263 if test "$tor_cv_library_zlib_dir" = "(system)"; then
1264 AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
1265 using --enable-static-zlib")
1266 else
1267 TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
1268 fi
1269 else
1270 TOR_ZLIB_LIBS="-lz"
1271 fi
1272 AC_SUBST(TOR_ZLIB_LIBS)
1274 dnl ------------------------------------------------------
1275 dnl Where we do we find lzma?
1277 AC_ARG_ENABLE(lzma,
1278 AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
1279 [case "${enableval}" in
1280 "yes") ;;
1281 "no") ;;
1282 * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
1283 esac], [enable_lzma=auto])
1285 if test "x$enable_lzma" = "xno"; then
1286 have_lzma=no;
1287 else
1288 PKG_CHECK_MODULES([LZMA],
1289 [liblzma],
1290 have_lzma=yes,
1291 have_lzma=no)
1293 if test "x$have_lzma" = "xno" ; then
1294 tor_incr_n_warnings
1295 AC_MSG_WARN([Unable to find liblzma, $pkg_config_user_action, or set LZMA_CFLAGS and LZMA_LIBS.])
1296 fi
1297 fi
1299 if test "x$have_lzma" = "xyes"; then
1300 AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
1301 TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
1302 TOR_LZMA_LIBS="${LZMA_LIBS}"
1303 fi
1304 AC_SUBST(TOR_LZMA_CFLAGS)
1305 AC_SUBST(TOR_LZMA_LIBS)
1307 dnl ------------------------------------------------------
1308 dnl Where we do we find zstd?
1310 AC_ARG_ENABLE(zstd,
1311 AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
1312 [case "${enableval}" in
1313 "yes") ;;
1314 "no") ;;
1315 * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
1316 esac], [enable_zstd=auto])
1318 if test "x$enable_zstd" = "xno"; then
1319 have_zstd=no;
1320 else
1321 PKG_CHECK_MODULES([ZSTD],
1322 [libzstd >= 1.1],
1323 have_zstd=yes,
1324 have_zstd=no)
1326 if test "x$have_zstd" = "xno" ; then
1327 tor_incr_n_warnings
1328 AC_MSG_WARN([Unable to find libzstd, $pkg_config_user_action, or set ZSTD_CFLAGS and ZSTD_LIBS.])
1329 fi
1330 fi
1332 if test "x$have_zstd" = "xyes"; then
1333 AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
1334 TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
1335 TOR_ZSTD_LIBS="${ZSTD_LIBS}"
1337 dnl now check for zstd functions
1338 save_LIBS="$LIBS"
1339 save_CFLAGS="$CFLAGS"
1340 LIBS="$LIBS $ZSTD_LIBS"
1341 CFLAGS="$CFLAGS $ZSTD_CFLAGS"
1342 AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
1343 ZSTD_estimateDCtxSize)
1344 LIBS="$save_LIBS"
1345 CFLAGS="$save_CFLAGS"
1346 fi
1347 AC_SUBST(TOR_ZSTD_CFLAGS)
1348 AC_SUBST(TOR_ZSTD_LIBS)
1350 dnl ----------------------------------------------------------------------
1351 dnl Check if libcap is available for capabilities.
1353 tor_cap_pkg_debian="libcap2"
1354 tor_cap_pkg_redhat="libcap"
1355 tor_cap_devpkg_debian="libcap-dev"
1356 tor_cap_devpkg_redhat="libcap-devel"
1358 AC_CHECK_LIB([cap], [cap_init], [],
1359 AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
1360 )
1361 AC_CHECK_FUNCS(cap_set_proc)
1363 dnl ---------------------------------------------------------------------
1364 dnl Now that we know about our major libraries, we can check for compiler
1365 dnl and linker hardening options. We need to do this with the libraries known,
1366 dnl since sometimes the linker will like an option but not be willing to
1367 dnl use it with a build of a library.
1369 all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
1370 all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
1372 CFLAGS_FTRAPV=
1373 CFLAGS_FWRAPV=
1374 CFLAGS_ASAN=
1375 CFLAGS_UBSAN=
1378 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
1379 #if !defined(__clang__)
1380 #error
1381 #endif])], have_clang=yes, have_clang=no)
1383 if test "x$enable_pic" = "xyes"; then
1384 TOR_CHECK_CFLAGS(-fPIC)
1385 fi
1387 if test "x$enable_gcc_hardening" != "xno"; then
1388 CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
1389 if test "x$have_clang" = "xyes"; then
1390 TOR_CHECK_CFLAGS(-Qunused-arguments)
1391 fi
1392 TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
1393 AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
1394 AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
1395 m4_ifdef([AS_VAR_IF],[
1396 AS_VAR_IF(can_compile, [yes],
1397 AS_VAR_IF(can_link, [yes],
1398 [],
1399 AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
1400 )])
1401 AS_VAR_POPDEF([can_link])
1402 AS_VAR_POPDEF([can_compile])
1403 TOR_CHECK_CFLAGS(-Wstack-protector)
1404 TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
1405 if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
1406 if test "$enable_pic" != "yes"; then
1407 # If we have already enabled -fPIC, then we don't also need to
1408 # compile with -fPIE...
1409 TOR_CHECK_CFLAGS(-fPIE)
1410 fi
1411 # ... but we want to link our executables with -pie in any case, since
1412 # they're executables, not a library.
1413 TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
1414 fi
1415 TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
1417 AC_MSG_CHECKING([whether we can run hardened binaries])
1418 AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
1419 [AC_MSG_RESULT([yes])],
1420 [AC_MSG_RESULT([no])
1421 AC_MSG_ERROR([dnl
1422 We can link with compiler hardening options, but we can't run with them.
1423 That's a bad sign! If you must, you can pass --disable-gcc-hardening to
1424 configure, but it would be better to figure out what the underlying problem
1425 is.])],
1426 [AC_MSG_RESULT([cross])])
1427 fi
1429 if test "$fragile_hardening" = "yes"; then
1430 TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
1431 if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
1432 tor_incr_n_warnings
1433 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.])
1434 fi
1436 if test "$tor_cv_cflags__ftrapv" != "yes"; then
1437 AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
1438 fi
1440 TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
1441 if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
1442 AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
1443 fi
1445 TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
1446 if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
1447 AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
1448 fi
1450 TOR_TRY_COMPILE_WITH_CFLAGS([-fno-sanitize=float-divide-by-zero], also_link, CFLAGS_UBSAN="-fno-sanitize=float-divide-by-zero", true)
1451 if test "$tor_cv_cflags__fno_sanitize_float_divide_by_zero" = "yes" && test "$tor_can_link__fno_sanitize_float_divide_by_zero" != "yes"; then
1452 AC_MSG_ERROR([The compiler supports -fno-sanitize=float-divide-by-zero, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
1453 fi
1455 TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
1456 fi
1458 dnl Find the correct libraries to add in order to use the sanitizers.
1459 dnl
1460 dnl When building Rust, Cargo will run the linker with the -nodefaultlibs
1461 dnl option, which will prevent the compiler from linking the sanitizer
1462 dnl libraries it needs. We need to specify them manually.
1463 dnl
1464 dnl What's more, we need to specify them in a linker script rather than
1465 dnl from build.rs: these options aren't allowed in the cargo:rustc-flags
1466 dnl variable.
1467 RUST_LINKER_OPTIONS=""
1468 if test "x$have_clang" = "xyes"; then
1469 if test "x$CFLAGS_ASAN" != "x"; then
1470 RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_ASAN -Cdefault-linker-libraries"
1471 fi
1472 if test "x$CFLAGS_UBSAN" != "x"; then
1473 RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_UBSAN -Cdefault-linker-libraries"
1474 fi
1475 else
1476 if test "x$CFLAGS_ASAN" != "x"; then
1477 RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=address -Cdefault-linker-libraries"
1478 fi
1479 if test "x$CFLAGS_UBSAN" != "x"; then
1480 RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=undefined -Cdefault-linker-libraries"
1481 fi
1482 fi
1483 AC_SUBST(RUST_LINKER_OPTIONS)
1485 CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
1486 CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
1488 mulodi_fixes_ftrapv=no
1489 if test "$have_clang" = "yes"; then
1490 saved_CFLAGS="$CFLAGS"
1491 CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
1492 AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
1493 AC_LINK_IFELSE([
1494 AC_LANG_SOURCE([[
1495 #include <stdint.h>
1496 #include <stdlib.h>
1497 int main(int argc, char **argv)
1498 {
1499 int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
1500 * (int64_t)atoi(argv[3]);
1501 return x == 9;
1502 } ]])],
1503 [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
1504 [ftrapv_can_link=no; AC_MSG_RESULT([no])])
1505 if test "$ftrapv_can_link" = "no"; then
1506 AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
1507 AC_LINK_IFELSE([
1508 AC_LANG_SOURCE([[
1509 #include <stdint.h>
1510 #include <stdlib.h>
1511 int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
1512 *overflow=0;
1513 return a;
1514 }
1515 int main(int argc, char **argv)
1516 {
1517 int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
1518 * (int64_t)atoi(argv[3]);
1519 return x == 9;
1520 } ]])],
1521 [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
1522 [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
1523 fi
1524 CFLAGS="$saved_CFLAGS"
1525 fi
1527 AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
1529 dnl These cflags add bunches of branches, and we haven't been able to
1530 dnl persuade ourselves that they're suitable for code that needs to be
1531 dnl constant time.
1532 AC_SUBST(CFLAGS_BUGTRAP)
1533 dnl These cflags are variant ones suitable for code that needs to be
1534 dnl constant-time.
1535 AC_SUBST(CFLAGS_CONSTTIME)
1537 if test "x$enable_linker_hardening" != "xno"; then
1538 TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
1539 fi
1541 # For backtrace support
1542 TOR_CHECK_LDFLAGS(-rdynamic)
1544 dnl ------------------------------------------------------
1545 dnl Now see if we have a -fomit-frame-pointer compiler option.
1547 saved_CFLAGS="$CFLAGS"
1548 TOR_CHECK_CFLAGS(-fomit-frame-pointer)
1549 F_OMIT_FRAME_POINTER=''
1550 if test "$saved_CFLAGS" != "$CFLAGS"; then
1551 if test "$fragile_hardening" = "yes"; then
1552 F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
1553 fi
1554 fi
1555 CFLAGS="$saved_CFLAGS"
1556 AC_SUBST(F_OMIT_FRAME_POINTER)
1558 dnl ------------------------------------------------------
1559 dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
1560 dnl for us, as GCC 4.6 and later do at many optimization levels), then
1561 dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
1562 dnl code will work.
1563 TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
1565 dnl ============================================================
1566 dnl Check for libseccomp
1568 if test "x$enable_seccomp" != "xno"; then
1569 AC_CHECK_HEADERS([seccomp.h])
1570 AC_SEARCH_LIBS(seccomp_init, [seccomp])
1571 fi
1573 dnl ============================================================
1574 dnl Check for libscrypt
1576 if test "x$enable_libscrypt" != "xno"; then
1577 AC_CHECK_HEADERS([libscrypt.h])
1578 AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
1579 AC_CHECK_FUNCS([libscrypt_scrypt])
1580 fi
1582 dnl ============================================================
1583 dnl We need an implementation of curve25519.
1585 dnl set these defaults.
1586 build_curve25519_donna=no
1587 build_curve25519_donna_c64=no
1588 use_curve25519_donna=no
1589 use_curve25519_nacl=no
1590 CURVE25519_LIBS=
1592 dnl The best choice is using curve25519-donna-c64, but that requires
1593 dnl that we
1594 AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
1595 tor_cv_can_use_curve25519_donna_c64,
1596 [AC_RUN_IFELSE(
1597 [AC_LANG_PROGRAM([dnl
1598 #include <stdint.h>
1599 typedef unsigned uint128_t __attribute__((mode(TI)));
1600 int func(uint64_t a, uint64_t b) {
1601 uint128_t c = ((uint128_t)a) * b;
1602 int ok = ((uint64_t)(c>>96)) == 522859 &&
1603 (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
1604 (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
1605 (((uint64_t)(c))&0xffffffffL) == 0;
1606 return ok;
1607 }
1608 ], [dnl
1609 int ok = func( ((uint64_t)2000000000) * 1000000000,
1610 ((uint64_t)1234567890) << 24);
1611 return !ok;
1612 ])],
1613 [tor_cv_can_use_curve25519_donna_c64=yes],
1614 [tor_cv_can_use_curve25519_donna_c64=no],
1615 [AC_LINK_IFELSE(
1616 [AC_LANG_PROGRAM([dnl
1617 #include <stdint.h>
1618 typedef unsigned uint128_t __attribute__((mode(TI)));
1619 int func(uint64_t a, uint64_t b) {
1620 uint128_t c = ((uint128_t)a) * b;
1621 int ok = ((uint64_t)(c>>96)) == 522859 &&
1622 (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
1623 (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
1624 (((uint64_t)(c))&0xffffffffL) == 0;
1625 return ok;
1626 }
1627 ], [dnl
1628 int ok = func( ((uint64_t)2000000000) * 1000000000,
1629 ((uint64_t)1234567890) << 24);
1630 return !ok;
1631 ])],
1632 [tor_cv_can_use_curve25519_donna_c64=cross],
1633 [tor_cv_can_use_curve25519_donna_c64=no])])])
1635 AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
1636 nacl/crypto_scalarmult_curve25519.h])
1638 AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
1639 tor_cv_can_use_curve25519_nacl,
1640 [tor_saved_LIBS="$LIBS"
1641 LIBS="$LIBS -lnacl"
1642 AC_LINK_IFELSE(
1643 [AC_LANG_PROGRAM([dnl
1644 #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
1645 #include <crypto_scalarmult_curve25519.h>
1646 #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
1647 #include <nacl/crypto_scalarmult_curve25519.h>
1648 #endif
1649 #ifdef crypto_scalarmult_curve25519_ref_BYTES
1650 #error Hey, this is the reference implementation! That's not fast.
1651 #endif
1652 ], [
1653 unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
1654 ])], [tor_cv_can_use_curve25519_nacl=yes],
1655 [tor_cv_can_use_curve25519_nacl=no])
1656 LIBS="$tor_saved_LIBS" ])
1658 dnl Okay, now we need to figure out which one to actually use. Fall back
1659 dnl to curve25519-donna.c
1661 if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
1662 build_curve25519_donna_c64=yes
1663 use_curve25519_donna=yes
1664 elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
1665 use_curve25519_nacl=yes
1666 CURVE25519_LIBS=-lnacl
1667 else
1668 build_curve25519_donna=yes
1669 use_curve25519_donna=yes
1670 fi
1672 if test "x$use_curve25519_donna" = "xyes"; then
1673 AC_DEFINE(USE_CURVE25519_DONNA, 1,
1674 [Defined if we should use an internal curve25519_donna{,_c64} implementation])
1675 fi
1676 if test "x$use_curve25519_nacl" = "xyes"; then
1677 AC_DEFINE(USE_CURVE25519_NACL, 1,
1678 [Defined if we should use a curve25519 from nacl])
1679 fi
1680 AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
1681 test "x$build_curve25519_donna" = "xyes")
1682 AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
1683 test "x$build_curve25519_donna_c64" = "xyes")
1684 AC_SUBST(CURVE25519_LIBS)
1686 dnl Make sure to enable support for large off_t if available.
1687 AC_SYS_LARGEFILE
1689 AC_CHECK_HEADERS([errno.h \
1690 fcntl.h \
1691 signal.h \
1692 string.h \
1693 sys/capability.h \
1694 sys/fcntl.h \
1695 sys/stat.h \
1696 sys/time.h \
1697 sys/types.h \
1698 time.h \
1699 unistd.h \
1700 arpa/inet.h \
1701 crt_externs.h \
1702 execinfo.h \
1703 gnu/libc-version.h \
1704 grp.h \
1705 ifaddrs.h \
1706 inttypes.h \
1707 limits.h \
1708 linux/types.h \
1709 mach/vm_inherit.h \
1710 machine/limits.h \
1711 malloc.h \
1712 netdb.h \
1713 netinet/in.h \
1714 netinet/in6.h \
1715 pwd.h \
1716 readpassphrase.h \
1717 stdatomic.h \
1718 sys/eventfd.h \
1719 sys/file.h \
1720 sys/ioctl.h \
1721 sys/limits.h \
1722 sys/mman.h \
1723 sys/param.h \
1724 sys/prctl.h \
1725 sys/random.h \
1726 sys/resource.h \
1727 sys/select.h \
1728 sys/socket.h \
1729 sys/statvfs.h \
1730 sys/syscall.h \
1731 sys/sysctl.h \
1732 sys/time.h \
1733 sys/types.h \
1734 sys/un.h \
1735 sys/utime.h \
1736 sys/wait.h \
1737 syslog.h \
1738 utime.h \
1739 glob.h])
1741 AC_CHECK_HEADERS(sys/param.h)
1743 AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
1744 [#ifdef HAVE_SYS_TYPES_H
1745 #include <sys/types.h>
1746 #endif
1747 #ifdef HAVE_SYS_SOCKET_H
1748 #include <sys/socket.h>
1749 #endif])
1750 AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
1751 [#ifdef HAVE_SYS_TYPES_H
1752 #include <sys/types.h>
1753 #endif
1754 #ifdef HAVE_SYS_SOCKET_H
1755 #include <sys/socket.h>
1756 #endif
1757 #ifdef HAVE_NET_IF_H
1758 #include <net/if.h>
1759 #endif
1760 #ifdef HAVE_NETINET_IN_H
1761 #include <netinet/in.h>
1762 #endif])
1764 AC_CHECK_HEADERS(linux/if.h,[],[],
1765 [
1766 #ifdef HAVE_SYS_SOCKET_H
1767 #include <sys/socket.h>
1768 #endif
1769 ])
1771 AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
1772 linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
1773 [#ifdef HAVE_SYS_TYPES_H
1774 #include <sys/types.h>
1775 #endif
1776 #ifdef HAVE_SYS_SOCKET_H
1777 #include <sys/socket.h>
1778 #endif
1779 #ifdef HAVE_LIMITS_H
1780 #include <limits.h>
1781 #endif
1782 #ifdef HAVE_LINUX_TYPES_H
1783 #include <linux/types.h>
1784 #endif
1785 #ifdef HAVE_NETINET_IN6_H
1786 #include <netinet/in6.h>
1787 #endif
1788 #ifdef HAVE_NETINET_IN_H
1789 #include <netinet/in.h>
1790 #endif])
1792 AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
1793 linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
1794 [#ifdef HAVE_SYS_TYPES_H
1795 #include <sys/types.h>
1796 #endif
1797 #ifdef HAVE_SYS_SOCKET_H
1798 #include <sys/socket.h>
1799 #endif
1800 #ifdef HAVE_LIMITS_H
1801 #include <limits.h>
1802 #endif
1803 #ifdef HAVE_LINUX_TYPES_H
1804 #include <linux/types.h>
1805 #endif
1806 #ifdef HAVE_NETINET_IN6_H
1807 #include <netinet/in6.h>
1808 #endif
1809 #ifdef HAVE_NETINET_IN_H
1810 #include <netinet/in.h>
1811 #endif
1812 #ifdef HAVE_LINUX_IF_H
1813 #include <linux/if.h>
1814 #endif])
1816 transparent_ok=0
1817 if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
1818 transparent_ok=1
1819 fi
1820 if test "x$linux_netfilter_ipv4" = "x1"; then
1821 transparent_ok=1
1822 fi
1823 if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
1824 transparent_ok=1
1825 fi
1826 if test "x$transparent_ok" = "x1"; then
1827 AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
1828 else
1829 AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
1830 fi
1832 AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
1833 [#ifdef HAVE_SYS_TYPES_H
1834 #include <sys/types.h>
1835 #endif
1836 #ifdef HAVE_SYS_TIME_H
1837 #include <sys/time.h>
1838 #endif])
1840 AC_CHECK_SIZEOF(char)
1841 AC_CHECK_SIZEOF(short)
1842 AC_CHECK_SIZEOF(int)
1843 AC_CHECK_SIZEOF(unsigned int)
1844 AC_CHECK_SIZEOF(long)
1845 AC_CHECK_SIZEOF(long long)
1846 AC_CHECK_SIZEOF(__int64)
1847 AC_CHECK_SIZEOF(void *)
1848 AC_CHECK_SIZEOF(time_t)
1849 AC_CHECK_SIZEOF(size_t)
1850 AC_CHECK_SIZEOF(pid_t)
1852 AC_CHECK_TYPES([uint, u_char, ssize_t])
1854 AC_PC_FROM_UCONTEXT([:])
1856 dnl used to include sockaddr_storage, but everybody has that.
1857 AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
1858 [#ifdef HAVE_SYS_TYPES_H
1859 #include <sys/types.h>
1860 #endif
1861 #ifdef HAVE_NETINET_IN_H
1862 #include <netinet/in.h>
1863 #endif
1864 #ifdef HAVE_NETINET_IN6_H
1865 #include <netinet/in6.h>
1866 #endif
1867 #ifdef HAVE_SYS_SOCKET_H
1868 #include <sys/socket.h>
1869 #endif
1870 #ifdef _WIN32
1871 #define _WIN32_WINNT 0x0501
1872 #define WIN32_LEAN_AND_MEAN
1873 #include <winsock2.h>
1874 #include <ws2tcpip.h>
1875 #endif
1876 ])
1877 AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
1878 [#ifdef HAVE_SYS_TYPES_H
1879 #include <sys/types.h>
1880 #endif
1881 #ifdef HAVE_NETINET_IN_H
1882 #include <netinet/in.h>
1883 #endif
1884 #ifdef HAVE_NETINET_IN6_H
1885 #include <netinet/in6.h>
1886 #endif
1887 #ifdef HAVE_SYS_SOCKET_H
1888 #include <sys/socket.h>
1889 #endif
1890 #ifdef _WIN32
1891 #define _WIN32_WINNT 0x0501
1892 #define WIN32_LEAN_AND_MEAN
1893 #include <winsock2.h>
1894 #include <ws2tcpip.h>
1895 #endif
1896 ])
1898 AC_CHECK_TYPES([rlim_t], , ,
1899 [#ifdef HAVE_SYS_TYPES_H
1900 #include <sys/types.h>
1901 #endif
1902 #ifdef HAVE_SYS_TIME_H
1903 #include <sys/time.h>
1904 #endif
1905 #ifdef HAVE_SYS_RESOURCE_H
1906 #include <sys/resource.h>
1907 #endif
1908 ])
1910 AX_CHECK_SIGN([time_t],
1911 [ : ],
1912 [ : ], [
1913 #ifdef HAVE_SYS_TYPES_H
1914 #include <sys/types.h>
1915 #endif
1916 #ifdef HAVE_SYS_TIME_H
1917 #include <sys/time.h>
1918 #endif
1919 #ifdef HAVE_TIME_H
1920 #include <time.h>
1921 #endif
1922 ])
1924 if test "$ax_cv_decl_time_t_signed" = "no"; then
1925 AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
1926 fi
1928 AX_CHECK_SIGN([size_t],
1929 [ tor_cv_size_t_signed=yes ],
1930 [ tor_cv_size_t_signed=no ], [
1931 #ifdef HAVE_SYS_TYPES_H
1932 #include <sys/types.h>
1933 #endif
1934 ])
1936 if test "$ax_cv_decl_size_t_signed" = "yes"; then
1937 AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
1938 fi
1940 AX_CHECK_SIGN([enum always],
1941 [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
1942 [ : ], [
1943 enum always { AAA, BBB, CCC };
1944 ])
1946 AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
1947 #ifdef HAVE_SYS_SOCKET_H
1948 #include <sys/socket.h>
1949 #endif
1950 ])
1952 # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
1954 AC_CHECK_SIZEOF(cell_t)
1956 # Let's see if stdatomic works. (There are some debian clangs that screw it
1957 # up; see Tor bug #26779 and debian bug 903709.)
1958 AC_CACHE_CHECK([whether C11 stdatomic.h actually works],
1959 tor_cv_stdatomic_works,
1960 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
1961 #include <stdatomic.h>
1962 struct x { atomic_size_t y; };
1963 void try_atomic_init(struct x *xx)
1964 {
1965 atomic_init(&xx->y, 99);
1966 atomic_fetch_add(&xx->y, 1);
1967 }
1968 ]])], [tor_cv_stdatomic_works=yes], [tor_cv_stdatomic_works=no])])
1970 if test "$tor_cv_stdatomic_works" = "yes"; then
1971 AC_DEFINE(STDATOMIC_WORKS, 1, [Set to 1 if we can compile a simple stdatomic example.])
1972 elif test "$ac_cv_header_stdatomic_h" = "yes"; then
1973 tor_incr_n_warnings
1974 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 ])
1975 fi
1977 # Now make sure that NULL can be represented as zero bytes.
1978 AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
1979 [AC_RUN_IFELSE([AC_LANG_SOURCE(
1980 [[#include <stdlib.h>
1981 #include <string.h>
1982 #include <stdio.h>
1983 #ifdef HAVE_STDDEF_H
1984 #include <stddef.h>
1985 #endif
1986 int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
1987 return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
1988 [tor_cv_null_is_zero=yes],
1989 [tor_cv_null_is_zero=no],
1990 [tor_cv_null_is_zero=cross])])
1992 if test "$tor_cv_null_is_zero" = "cross"; then
1993 # Cross-compiling; let's hope that the target isn't raving mad.
1994 AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
1995 fi
1997 if test "$tor_cv_null_is_zero" != "no"; then
1998 AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
1999 [Define to 1 iff memset(0) sets pointers to NULL])
2000 fi
2002 AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
2003 [AC_RUN_IFELSE([AC_LANG_SOURCE(
2004 [[#include <stdlib.h>
2005 #include <string.h>
2006 #include <stdio.h>
2007 #ifdef HAVE_STDDEF_H
2008 #include <stddef.h>
2009 #endif
2010 int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
2011 return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
2012 [tor_cv_dbl0_is_zero=yes],
2013 [tor_cv_dbl0_is_zero=no],
2014 [tor_cv_dbl0_is_zero=cross])])
2016 if test "$tor_cv_dbl0_is_zero" = "cross"; then
2017 # Cross-compiling; let's hope that the target isn't raving mad.
2018 AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
2019 fi
2021 if test "$tor_cv_dbl0_is_zero" != "no"; then
2022 AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
2023 [Define to 1 iff memset(0) sets doubles to 0.0])
2024 fi
2026 # And what happens when we malloc zero?
2027 AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
2028 [AC_RUN_IFELSE([AC_LANG_SOURCE(
2029 [[#include <stdlib.h>
2030 #include <string.h>
2031 #include <stdio.h>
2032 #ifdef HAVE_STDDEF_H
2033 #include <stddef.h>
2034 #endif
2035 int main () { return malloc(0)?0:1; }]])],
2036 [tor_cv_malloc_zero_works=yes],
2037 [tor_cv_malloc_zero_works=no],
2038 [tor_cv_malloc_zero_works=cross])])
2040 if test "$tor_cv_malloc_zero_works" = "cross"; then
2041 # Cross-compiling; let's hope that the target isn't raving mad.
2042 AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
2043 fi
2045 if test "$tor_cv_malloc_zero_works" = "yes"; then
2046 AC_DEFINE([MALLOC_ZERO_WORKS], 1,
2047 [Define to 1 iff malloc(0) returns a pointer])
2048 fi
2050 # whether we seem to be in a 2s-complement world.
2051 AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
2052 [AC_RUN_IFELSE([AC_LANG_SOURCE(
2053 [[int main () { int problem = ((-99) != (~99)+1);
2054 return problem ? 1 : 0; }]])],
2055 [tor_cv_twos_complement=yes],
2056 [tor_cv_twos_complement=no],
2057 [tor_cv_twos_complement=cross])])
2059 if test "$tor_cv_twos_complement" = "cross"; then
2060 # Cross-compiling; let's hope that the target isn't raving mad.
2061 AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
2062 fi
2064 if test "$tor_cv_twos_complement" != "no"; then
2065 AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
2066 [Define to 1 iff we represent negative integers with
2067 two's complement])
2068 fi
2070 # What does shifting a negative value do?
2071 AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
2072 [AC_RUN_IFELSE([AC_LANG_SOURCE(
2073 [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
2074 [tor_cv_sign_extend=yes],
2075 [tor_cv_sign_extend=no],
2076 [tor_cv_sign_extend=cross])])
2078 if test "$tor_cv_sign_extend" = "cross"; then
2079 # Cross-compiling; let's hope that the target isn't raving mad.
2080 AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
2081 fi
2083 if test "$tor_cv_sign_extend" != "no"; then
2084 AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
2085 [Define to 1 iff right-shifting a negative value performs sign-extension])
2086 fi
2088 # Is uint8_t the same type as unsigned char?
2089 AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
2090 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
2091 #include <stdint.h>
2092 extern uint8_t c;
2093 unsigned char c;]])],
2094 [tor_cv_uint8_uchar=yes],
2095 [tor_cv_uint8_uchar=no],
2096 [tor_cv_uint8_uchar=cross])])
2098 if test "$tor_cv_uint8_uchar" = "cross"; then
2099 AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
2100 fi
2102 if test "$tor_cv_uint8_uchar" = "no"; then
2103 AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
2104 fi
2106 AC_ARG_WITH(tcmalloc,
2107 AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library. Deprecated; see --with-malloc]))
2109 default_malloc=system
2111 if test "x$enable_openbsd_malloc" = "xyes" ; then
2112 AC_MSG_NOTICE([The --enable-openbsd-malloc argument is deprecated; use --with-malloc=openbsd instead.])
2113 default_malloc=openbsd
2114 fi
2116 if test "x$with_tcmalloc" = "xyes"; then
2117 AC_MSG_NOTICE([The --with-tcmalloc argument is deprecated; use --with-malloc=tcmalloc instead.])
2118 default_malloc=tcmalloc
2119 fi
2121 AC_ARG_WITH(malloc,
2122 AS_HELP_STRING([--with-malloc=[system,jemalloc,tcmalloc,openbsd]],
2123 [select special malloc implementation [system]]),
2124 [ malloc="$with_malloc" ], [ malloc="$default_malloc" ])
2126 AS_CASE([$malloc],
2127 [tcmalloc], [
2128 PKG_CHECK_MODULES([TCMALLOC],
2129 [libtcmalloc],
2130 have_tcmalloc=yes,
2131 have_tcmalloc=no)
2133 if test "x$have_tcmalloc" = "xno" ; then
2134 AC_MSG_ERROR([Unable to find tcmalloc requested by --with-malloc, $pkg_config_user_action, or set TCMALLOC_CFLAGS and TCMALLOC_LIBS.])
2135 fi
2137 CFLAGS="$CFLAGS $TCMALLOC_CFLAGS"
2138 LIBS="$TCMALLOC_LIBS $LIBS"
2139 ],
2141 [jemalloc], [
2142 PKG_CHECK_MODULES([JEMALLOC],
2143 [jemalloc],
2144 have_jemalloc=yes,
2145 have_jemalloc=no)
2147 if test "x$have_jemalloc" = "xno" ; then
2148 AC_MSG_ERROR([Unable to find jemalloc requested by --with-malloc, $pkg_config_user_action, or set JEMALLOC_CFLAGS and JEMALLOC_LIBS.])
2149 fi
2151 CFLAGS="$CFLAGS $JEMALLOC_CFLAGS"
2152 LIBS="$JEMALLOC_LIBS $LIBS"
2153 using_custom_malloc=yes
2154 ],
2156 [openbsd], [
2157 tor_incr_n_warnings
2158 AC_MSG_WARN([The openbsd malloc port is deprecated in Tor 0.3.5 and will be removed in a future version.])
2159 enable_openbsd_malloc=yes
2160 ],
2162 [system], [
2163 # handle this later, including the jemalloc fallback
2164 ],
2166 [AC_MSG_ERROR([--with-malloc=`$with_malloc' not supported, see --help])
2167 ])
2169 AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
2171 if test "$malloc" != "system"; then
2172 # Tell the C compiler not to use the system allocator functions.
2173 TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
2174 fi
2175 if test "$using_custom_malloc" = "yes"; then
2176 # Tell the C compiler not to use the system allocator functions.
2177 TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
2178 fi
2180 # By default, we're going to assume we don't have mlockall()
2181 # bionic and other platforms have various broken mlockall subsystems.
2182 # Some systems don't have a working mlockall, some aren't linkable,
2183 # and some have it but don't declare it.
2184 AC_CHECK_FUNCS(mlockall)
2185 AC_CHECK_DECLS([mlockall], , , [
2186 #ifdef HAVE_SYS_MMAN_H
2187 #include <sys/mman.h>
2188 #endif])
2190 # Allow user to specify an alternate syslog facility
2191 AC_ARG_WITH(syslog-facility,
2192 AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
2193 syslog_facility="$withval", syslog_facility="LOG_DAEMON")
2194 AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
2195 AC_SUBST(LOGFACILITY)
2197 # Check if we have getresuid and getresgid
2198 AC_CHECK_FUNCS(getresuid getresgid)
2200 # Check for gethostbyname_r in all its glorious incompatible versions.
2201 # (This logic is based on that in Python's configure.in)
2202 AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
2203 [Define this if you have any gethostbyname_r()])
2205 AC_CHECK_FUNC(gethostbyname_r, [
2206 AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
2207 OLD_CFLAGS=$CFLAGS
2208 CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
2209 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2210 #include <netdb.h>
2211 ]], [[
2212 char *cp1, *cp2;
2213 struct hostent *h1, *h2;
2214 int i1, i2;
2215 (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
2216 ]])],[
2217 AC_DEFINE(HAVE_GETHOSTBYNAME_R)
2218 AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
2219 [Define this if gethostbyname_r takes 6 arguments])
2220 AC_MSG_RESULT(6)
2221 ], [
2222 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2223 #include <netdb.h>
2224 ]], [[
2225 char *cp1, *cp2;
2226 struct hostent *h1;
2227 int i1, i2;
2228 (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
2229 ]])], [
2230 AC_DEFINE(HAVE_GETHOSTBYNAME_R)
2231 AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
2232 [Define this if gethostbyname_r takes 5 arguments])
2233 AC_MSG_RESULT(5)
2234 ], [
2235 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
2236 #include <netdb.h>
2237 ]], [[
2238 char *cp1;
2239 struct hostent *h1;
2240 struct hostent_data hd;
2241 (void) gethostbyname_r(cp1,h1,&hd);
2242 ]])], [
2243 AC_DEFINE(HAVE_GETHOSTBYNAME_R)
2244 AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
2245 [Define this if gethostbyname_r takes 3 arguments])
2246 AC_MSG_RESULT(3)
2247 ], [
2248 AC_MSG_RESULT(0)
2249 ])
2250 ])
2251 ])
2252 CFLAGS=$OLD_CFLAGS
2253 ])
2255 AC_CACHE_CHECK([whether the C compiler supports __func__],
2256 tor_cv_have_func_macro,
2257 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
2258 #include <stdio.h>
2259 int main(int c, char **v) { puts(__func__); }])],
2260 tor_cv_have_func_macro=yes,
2261 tor_cv_have_func_macro=no))
2263 AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
2264 tor_cv_have_FUNC_macro,
2265 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
2266 #include <stdio.h>
2267 int main(int c, char **v) { puts(__FUNC__); }])],
2268 tor_cv_have_FUNC_macro=yes,
2269 tor_cv_have_FUNC_macro=no))
2271 AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
2272 tor_cv_have_FUNCTION_macro,
2273 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
2274 #include <stdio.h>
2275 int main(int c, char **v) { puts(__FUNCTION__); }])],
2276 tor_cv_have_FUNCTION_macro=yes,
2277 tor_cv_have_FUNCTION_macro=no))
2279 AC_CACHE_CHECK([whether we have extern char **environ already declared],
2280 tor_cv_have_environ_declared,
2281 AC_COMPILE_IFELSE([AC_LANG_SOURCE([
2282 #ifdef HAVE_UNISTD_H
2283 #include <unistd.h>
2284 #endif
2285 #include <stdlib.h>
2286 int main(int c, char **v) { char **t = environ; }])],
2287 tor_cv_have_environ_declared=yes,
2288 tor_cv_have_environ_declared=no))
2290 if test "$tor_cv_have_func_macro" = "yes"; then
2291 AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
2292 fi
2294 if test "$tor_cv_have_FUNC_macro" = "yes"; then
2295 AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
2296 fi
2298 if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
2299 AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
2300 [Defined if the compiler supports __FUNCTION__])
2301 fi
2303 if test "$tor_cv_have_environ_declared" = "yes"; then
2304 AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
2305 [Defined if we have extern char **environ already declared])
2306 fi
2308 # $prefix stores the value of the --prefix command line option, or
2309 # NONE if the option wasn't set. In the case that it wasn't set, make
2310 # it be the default, so that we can use it to expand directories now.
2311 if test "x$prefix" = "xNONE"; then
2312 prefix=$ac_default_prefix
2313 fi
2315 # and similarly for $exec_prefix
2316 if test "x$exec_prefix" = "xNONE"; then
2317 exec_prefix=$prefix
2318 fi
2320 if test "x$BUILDDIR" = "x"; then
2321 BUILDDIR=`pwd`
2322 fi
2323 AC_SUBST(BUILDDIR)
2324 AH_TEMPLATE([BUILDDIR],[tor's build directory])
2325 AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
2327 if test "x$SRCDIR" = "x"; then
2328 SRCDIR=$(cd "$srcdir"; pwd)
2329 fi
2330 AH_TEMPLATE([SRCDIR],[tor's sourcedir directory])
2331 AC_DEFINE_UNQUOTED(SRCDIR,"$SRCDIR")
2333 if test "x$CONFDIR" = "x"; then
2334 CONFDIR=`eval echo $sysconfdir/tor`
2335 fi
2336 AC_SUBST(CONFDIR)
2337 AH_TEMPLATE([CONFDIR],[tor's configuration directory])
2338 AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
2340 BINDIR=`eval echo $bindir`
2341 AC_SUBST(BINDIR)
2342 LOCALSTATEDIR=`eval echo $localstatedir`
2343 AC_SUBST(LOCALSTATEDIR)
2345 if test "$bwin32" = "true"; then
2346 # Test if the linker supports the --nxcompat and --dynamicbase options
2347 # for Windows
2348 save_LDFLAGS="$LDFLAGS"
2349 LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
2350 AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
2351 AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
2352 [AC_MSG_RESULT([yes])]
2353 [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
2354 [AC_MSG_RESULT([no])]
2355 )
2356 LDFLAGS="$save_LDFLAGS"
2357 fi
2359 # Set CFLAGS _after_ all the above checks, since our warnings are stricter
2360 # than autoconf's macros like.
2361 if test "$GCC" = "yes"; then
2362 # Disable GCC's strict aliasing checks. They are an hours-to-debug
2363 # accident waiting to happen.
2364 CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
2365 else
2366 # Override optimization level for non-gcc compilers
2367 CFLAGS="$CFLAGS -O"
2368 enable_gcc_warnings=no
2369 enable_gcc_warnings_advisory=no
2370 fi
2372 # Warnings implies advisory-warnings and -Werror.
2373 if test "$enable_gcc_warnings" = "yes"; then
2374 enable_gcc_warnings_advisory=yes
2375 enable_fatal_warnings=yes
2376 fi
2378 # OS X Lion started deprecating the system openssl. Let's just disable
2379 # all deprecation warnings on OS X. Also, to potentially make the binary
2380 # a little smaller, let's enable dead_strip.
2381 case "$host_os" in
2383 darwin*)
2384 CFLAGS="$CFLAGS -Wno-deprecated-declarations"
2385 LDFLAGS="$LDFLAGS -dead_strip" ;;
2386 esac
2388 TOR_WARNING_FLAGS=""
2390 # Add some more warnings which we use in development but not in the
2391 # released versions. (Some relevant gcc versions can't handle these.)
2392 #
2393 # Note that we have to do this near the end of the autoconf process, or
2394 # else we may run into problems when these warnings hit on the testing C
2395 # programs that autoconf wants to build.
2396 if test "x$enable_gcc_warnings_advisory" != "xno"; then
2398 case "$host" in
2399 *-*-openbsd* | *-*-bitrig*)
2400 # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
2401 # That's fine, except that the headers don't pass -Wredundant-decls.
2402 # Therefore, let's disable -Wsystem-headers when we're building
2403 # with maximal warnings on OpenBSD.
2404 CFLAGS="$CFLAGS -Wno-system-headers" ;;
2405 esac
2407 CFLAGS_NOWARNINGS="$CFLAGS"
2409 # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
2410 # have it work better.
2411 # CFLAGS="$CFLAGS -Wstrict-overflow=1"
2413 # This warning was added in gcc 4.3, but it appears to generate
2414 # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
2415 #CFLAGS="$CFLAGS -Wlogical-op"
2417 m4_foreach_w([warning_flag], [
2418 -Waddress
2419 -Waddress-of-array-temporary
2420 -Waddress-of-temporary
2421 -Wambiguous-macro
2422 -Wanonymous-pack-parens
2423 -Warc
2424 -Warc-abi
2425 -Warc-bridge-casts-disallowed-in-nonarc
2426 -Warc-maybe-repeated-use-of-weak
2427 -Warc-performSelector-leaks
2428 -Warc-repeated-use-of-weak
2429 -Warray-bounds
2430 -Warray-bounds-pointer-arithmetic
2431 -Wasm
2432 -Wasm-operand-widths
2433 -Watomic-properties
2434 -Watomic-property-with-user-defined-accessor
2435 -Wauto-import
2436 -Wauto-storage-class
2437 -Wauto-var-id
2438 -Wavailability
2439 -Wbackslash-newline-escape
2440 -Wbad-array-new-length
2441 -Wbind-to-temporary-copy
2442 -Wbitfield-constant-conversion
2443 -Wbool-conversion
2444 -Wbool-conversions
2445 -Wbuiltin-requires-header
2446 -Wchar-align
2447 -Wcompare-distinct-pointer-types
2448 -Wcomplex-component-init
2449 -Wconditional-type-mismatch
2450 -Wconfig-macros
2451 -Wconstant-conversion
2452 -Wconstant-logical-operand
2453 -Wconstexpr-not-const
2454 -Wcustom-atomic-properties
2455 -Wdangling-field
2456 -Wdangling-initializer-list
2457 -Wdate-time
2458 -Wdelegating-ctor-cycles
2459 -Wdeprecated-implementations
2460 -Wdeprecated-register
2461 -Wdirect-ivar-access
2462 -Wdiscard-qual
2463 -Wdistributed-object-modifiers
2464 -Wdivision-by-zero
2465 -Wdollar-in-identifier-extension
2466 -Wdouble-promotion
2467 -Wduplicate-decl-specifier
2468 -Wduplicate-enum
2469 -Wduplicate-method-arg
2470 -Wduplicate-method-match
2471 -Wduplicated-cond
2472 -Wdynamic-class-memaccess
2473 -Wembedded-directive
2474 -Wempty-translation-unit
2475 -Wenum-conversion
2476 -Wexit-time-destructors
2477 -Wexplicit-ownership-type
2478 -Wextern-initializer
2479 -Wextra
2480 -Wextra-semi
2481 -Wextra-tokens
2482 -Wflexible-array-extensions
2483 -Wfloat-conversion
2484 -Wformat-non-iso
2485 -Wfour-char-constants
2486 -Wgcc-compat
2487 -Wglobal-constructors
2488 -Wgnu-array-member-paren-init
2489 -Wgnu-designator
2490 -Wgnu-static-float-init
2491 -Wheader-guard
2492 -Wheader-hygiene
2493 -Widiomatic-parentheses
2494 -Wignored-attributes
2495 -Wimplicit-atomic-properties
2496 -Wimplicit-conversion-floating-point-to-bool
2497 -Wimplicit-exception-spec-mismatch
2498 -Wimplicit-fallthrough
2499 -Wimplicit-fallthrough-per-function
2500 -Wimplicit-retain-self
2501 -Wimport-preprocessor-directive-pedantic
2502 -Wincompatible-library-redeclaration
2503 -Wincompatible-pointer-types-discards-qualifiers
2504 -Wincomplete-implementation
2505 -Wincomplete-module
2506 -Wincomplete-umbrella
2507 -Winit-self
2508 -Wint-conversions
2509 -Wint-to-void-pointer-cast
2510 -Winteger-overflow
2511 -Winvalid-constexpr
2512 -Winvalid-iboutlet
2513 -Winvalid-noreturn
2514 -Winvalid-pp-token
2515 -Winvalid-source-encoding
2516 -Winvalid-token-paste
2517 -Wknr-promoted-parameter
2518 -Wlarge-by-value-copy
2519 -Wliteral-conversion
2520 -Wliteral-range
2521 -Wlocal-type-template-args
2522 -Wlogical-op
2523 -Wloop-analysis
2524 -Wmain-return-type
2525 -Wmalformed-warning-check
2526 -Wmethod-signatures
2527 -Wmicrosoft
2528 -Wmicrosoft-exists
2529 -Wmismatched-parameter-types
2530 -Wmismatched-return-types
2531 -Wmissing-field-initializers
2532 -Wmissing-format-attribute
2533 -Wmissing-noreturn
2534 -Wmissing-selector-name
2535 -Wmissing-sysroot
2536 -Wmissing-variable-declarations
2537 -Wmodule-conflict
2538 -Wnested-anon-types
2539 -Wnewline-eof
2540 -Wnon-literal-null-conversion
2541 -Wnon-pod-varargs
2542 -Wnonportable-cfstrings
2543 -Wnormalized=nfkc
2544 -Wnull-arithmetic
2545 -Wnull-character
2546 -Wnull-conversion
2547 -Wnull-dereference
2548 -Wout-of-line-declaration
2549 -Wover-aligned
2550 -Woverlength-strings
2551 -Woverride-init
2552 -Woverriding-method-mismatch
2553 -Wpointer-type-mismatch
2554 -Wpredefined-identifier-outside-function
2555 -Wprotocol-property-synthesis-ambiguity
2556 -Wreadonly-iboutlet-property
2557 -Wreadonly-setter-attrs
2558 -Wreceiver-expr
2559 -Wreceiver-forward-class
2560 -Wreceiver-is-weak
2561 -Wreinterpret-base-class
2562 -Wrequires-super-attribute
2563 -Wreserved-user-defined-literal
2564 -Wreturn-stack-address
2565 -Wsection
2566 -Wselector-type-mismatch
2567 -Wsentinel
2568 -Wserialized-diagnostics
2569 -Wshadow
2570 -Wshift-count-negative
2571 -Wshift-count-overflow
2572 -Wshift-negative-value
2573 -Wshift-overflow=2
2574 -Wshift-sign-overflow
2575 -Wshorten-64-to-32
2576 -Wsizeof-array-argument
2577 -Wsource-uses-openmp
2578 -Wstatic-float-init
2579 -Wstatic-in-inline
2580 -Wstatic-local-in-inline
2581 -Wstrict-overflow=1
2582 -Wstring-compare
2583 -Wstring-conversion
2584 -Wstrlcpy-strlcat-size
2585 -Wstrncat-size
2586 -Wsuggest-attribute=format
2587 -Wsuggest-attribute=noreturn
2588 -Wsuper-class-method-mismatch
2589 -Wswitch-bool
2590 -Wsync-nand
2591 -Wtautological-constant-out-of-range-compare
2592 -Wtentative-definition-incomplete-type
2593 -Wtrampolines
2594 -Wtype-safety
2595 -Wtypedef-redefinition
2596 -Wtypename-missing
2597 -Wundefined-inline
2598 -Wundefined-internal
2599 -Wundefined-reinterpret-cast
2600 -Wunicode
2601 -Wunicode-whitespace
2602 -Wunknown-warning-option
2603 -Wunnamed-type-template-args
2604 -Wunneeded-member-function
2605 -Wunsequenced
2606 -Wunsupported-visibility
2607 -Wunused-but-set-parameter
2608 -Wunused-but-set-variable
2609 -Wunused-command-line-argument
2610 -Wunused-const-variable=2
2611 -Wunused-exception-parameter
2612 -Wunused-local-typedefs
2613 -Wunused-member-function
2614 -Wunused-sanitize-argument
2615 -Wunused-volatile-lvalue
2616 -Wuser-defined-literals
2617 -Wvariadic-macros
2618 -Wvector-conversion
2619 -Wvector-conversions
2620 -Wvexing-parse
2621 -Wvisibility
2622 -Wvla-extension
2623 -Wzero-length-array
2624 ], [ TOR_TRY_COMPILE_WITH_CFLAGS(warning_flag, [],
2625 [TOR_WARNING_FLAGS="$TOR_WARNING_FLAGS warning_flag" CFLAGS="$CFLAGS warning_flag"], true)
2626 ])
2628 dnl We should re-enable this in some later version. Clang doesn't
2629 dnl mind, but it causes trouble with GCC.
2630 dnl -Wstrict-overflow=2
2632 dnl These seem to require annotations that we don't currently use,
2633 dnl and they give false positives in our pthreads wrappers. (Clang 4)
2634 dnl -Wthread-safety
2635 dnl -Wthread-safety-analysis
2636 dnl -Wthread-safety-attributes
2637 dnl -Wthread-safety-beta
2638 dnl -Wthread-safety-precise
2640 W_FLAGS="$W_FLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
2641 W_FLAGS="$W_FLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
2642 W_FLAGS="$W_FLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
2643 W_FLAGS="$W_FLAGS -Wwrite-strings"
2644 W_FLAGS="$W_FLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
2645 W_FLAGS="$W_FLAGS -Waggregate-return -Wpacked -Wunused"
2646 W_FLAGS="$W_FLAGS -Wunused-parameter "
2647 # These interfere with building main() { return 0; }, which autoconf
2648 # likes to use as its default program.
2649 W_FLAGS="$W_FLAGS -Wold-style-definition -Wmissing-declarations"
2651 TOR_WARNING_FLAGS="$TOR_WARNING_FLAGS $W_FLAGS"
2652 CFLAGS="$CFLAGS $W_FLAGS"
2654 if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
2655 AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
2656 fi
2657 if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
2658 AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
2659 fi
2660 if test "$tor_cv_cflags__warn_unused_const_variable_2" = "yes"; then
2661 AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
2662 fi
2664 CFLAGS="$CFLAGS_NOWARNINGS"
2666 if test "x$enable_fatal_warnings" = "xyes"; then
2667 # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
2668 # default autoconf programs are full of errors.
2669 CFLAGS="$CFLAGS -Werror"
2670 fi
2672 fi
2674 AC_SUBST(TOR_WARNING_FLAGS)
2676 echo "$TOR_WARNING_FLAGS">warning_flags
2678 TOR_TRY_COMPILE_WITH_CFLAGS([@warning_flags], [],
2679 CFLAGS="$CFLAGS @warning_flags",
2680 CFLAGS="$CFLAGS $TOR_WARNING_FLAGS")
2682 if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
2683 case "$host_os" in
2684 darwin*)
2685 tor_incr_n_warnings
2686 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.])
2687 esac
2688 fi
2690 CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
2692 AC_CONFIG_FILES([
2693 Doxyfile
2694 Makefile
2695 config.rust
2696 contrib/operator-tools/tor.logrotate
2697 src/config/torrc.sample
2698 src/config/torrc.minimal
2699 src/rust/.cargo/config
2700 scripts/maint/checkOptionDocs.pl
2701 warning_flags
2702 ])
2704 if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
2705 regular_mans="doc/man/tor doc/man/tor-gencert doc/man/tor-resolve doc/man/torify"
2706 for file in $regular_mans ; do
2707 if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
2708 echo "==================================";
2709 echo;
2710 echo "Building Tor has failed since manpages cannot be built.";
2711 echo;
2712 echo "You need asciidoc installed to be able to build the manpages.";
2713 echo "To build without manpages, use the --disable-asciidoc argument";
2714 echo "when calling configure.";
2715 echo;
2716 echo "==================================";
2717 exit 1;
2718 fi
2719 done
2720 fi
2722 if test "$fragile_hardening" = "yes"; then
2723 tor_incr_n_warnings
2724 AC_MSG_WARN([
2726 ============
2727 Warning! Building Tor with --enable-fragile-hardening (also known as
2728 --enable-expensive-hardening) makes some kinds of attacks harder, but makes
2729 other kinds of attacks easier. A Tor instance build with this option will be
2730 somewhat less vulnerable to remote code execution, arithmetic overflow, or
2731 out-of-bounds read/writes... but at the cost of becoming more vulnerable to
2732 denial of service attacks. For more information, see
2733 https://gitlab.torproject.org/tpo/core/team/-/wikis/TorFragileHardening
2734 ============
2735 ])
2736 fi
2738 AC_OUTPUT
2740 if test "$openssl_ver_mismatch" = "yes"; then
2741 tor_incr_n_warnings
2742 AC_MSG_WARN([
2743 ============
2744 Warning! The version OpenSSL headers we get from compiling with
2745 "${TOR_CPPFLAGS_OPENSSL:-(no extra options)}"
2746 do not match version of the OpenSSL library we get when linking with
2747 "$TOR_LDFLAGS_OPENSSL $TOR_OPENSSL_LIBS".
2748 This might cause compilation to fail. Try using --with-openssl-dir to specify
2749 the exact OpenSSL path you want.
2750 ============
2751 ])
2752 fi
2754 #
2755 # Mini-report on what will be built.
2756 #
2758 PPRINT_INIT
2759 PPRINT_SET_INDENT(1)
2760 PPRINT_SET_TS(65)
2762 AS_ECHO
2763 AS_ECHO("Tor Version: ${PPRINT_COLOR_BLDBLU}Tor $PACKAGE_VERSION $PPRINT_COLOR_RST")
2764 AS_ECHO
2766 PPRINT_SUBTITLE([Build Features])
2768 PPRINT_PROP_STRING([Compiler], [$CC])
2769 PPRINT_PROP_STRING([Host OS], [$host_os])
2770 AS_ECHO
2772 test "x$enable_fatal_warnings" = "xyes" && value=1 || value=0
2773 PPRINT_PROP_BOOL([Warnings are fatal (--enable-fatal-warnings)], $value)
2775 test "x$enable_rust" = "xyes" && value=1 || value=0
2776 PPRINT_PROP_BOOL([Rust support (--enable-rust)], $value)
2778 test "x$enable_cargo_online_mode" = "xyes" && value=1 || value=0
2779 PPRINT_PROP_BOOL([Cargo Online Fetch (--enable-cargo-online-mode)], $value)
2781 test "x$enable_android" = "xyes" && value=1 || value=0
2782 PPRINT_PROP_BOOL([Android support (--enable-android)], $value)
2784 AS_ECHO
2785 PPRINT_SUBTITLE([Static Build])
2787 test "x$enable_static_tor" = "xyes" && value=1 || value=0
2788 PPRINT_PROP_BOOL([tor (--enable-static-tor)], $value)
2790 if test "x$enable_static_libevent" = "xyes"; then
2791 PPRINT_PROP_STRING([libevent], [$TOR_LIBDIR_libevent])
2792 else
2793 PPRINT_PROP_BOOL([libevent (--enable-static-libevent)], $value)
2794 fi
2796 if test "x$enable_static_openssl" = "xyes"; then
2797 PPRINT_PROP_STRING([libssl], [$TOR_LIBDIR_openssl])
2798 else
2799 PPRINT_PROP_BOOL([libssl (--enable-static-openssl)], $value)
2800 fi
2802 if test "x$enable_static_zlib" = "xyes"; then
2803 PPRINT_PROP_STRING([zlib1g], [$TOR_LIBDIR_zlib])
2804 else
2805 PPRINT_PROP_BOOL([zlib1g (--enable-static-zlib)], $value)
2806 fi
2808 AS_ECHO
2809 PPRINT_SUBTITLE([Optional Libraries])
2811 test "x$enable_nss" = "xyes" && value=1 || value=0
2812 PPRINT_PROP_BOOL([libnss (--enable-nss)], $value)
2814 test "x$enable_seccomp" != "xno" && value=1 || value=0
2815 PPRINT_PROP_BOOL([libseccomp (--disable-seccomp)], $value)
2817 test "x$enable_libscrypt" != "xno" && value=1 || value=0
2818 PPRINT_PROP_BOOL([libscrypt (--disable-libscrypt)], $value)
2820 test "x$enable_systemd" = "xyes" && value=1 || value=0
2821 PPRINT_PROP_BOOL([Systemd support (--enable-systemd)], $value)
2823 test "x$have_lzma" = "xyes" && value=1 || value=0
2824 PPRINT_PROP_BOOL([liblzma (--enable-lzma)], $value)
2826 test "x$have_zstd" = "xyes" && value=1 || value=0
2827 PPRINT_PROP_BOOL([libzstd (--enable-zstd)], $value)
2829 AS_ECHO
2830 PPRINT_SUBTITLE([Hardening])
2832 test "x$enable_gcc_hardening" != "xno" && value=1 || value=0
2833 PPRINT_PROP_BOOL([Compiler Hardening (--disable-gcc-hardening)], $value)
2835 test "x$enable_linker_hardening" != "xno" && value=1 || value=0
2836 PPRINT_PROP_BOOL([Linker Hardening (--disable-linker-hardening)], $value)
2838 test "x$fragile_hardening" = "xyes" && value=1 || value=0
2839 PPRINT_PROP_BOOL([Fragile Hardening (--enable-fragile-hardening, dev only)], $value)
2841 AS_ECHO
2842 PPRINT_SUBTITLE([Modules])
2844 m4_foreach_w([mname], MODULES,
2845 [
2846 AM_COND_IF(m4_join([], [BUILD_MODULE_], m4_toupper([]mname[])), value=1, value=0)
2847 m4_set_contains([MODULES_WITH_NO_OPTIONS], mname,
2848 PPRINT_PROP_BOOL([mname], $value),
2849 PPRINT_PROP_BOOL([mname (--disable-module-mname)], $value))
2850 ]
2851 )
2853 AS_ECHO
2854 PPRINT_SUBTITLE([Documentation])
2856 test "x$enable_asciidoc" != "xno" && value=1 || value=0
2857 PPRINT_PROP_BOOL([AsciiDoc (--disable-asciidoc)], $value)
2859 test "x$enable_manpage" != "xno" && value=1 || value=0
2860 PPRINT_PROP_BOOL([Man Pages (--disable-manpage)], $value)
2862 test "x$enable_html_manual" != "xno" && value=1 || value=0
2863 PPRINT_PROP_BOOL([HTML Manual (--disable-html-manual)], $value)
2865 AS_ECHO
2866 PPRINT_SUBTITLE([Tests])
2868 test "x$enable_unittests" != "xno" && value=1 || value=0
2869 PPRINT_PROP_BOOL([Unit tests (--disable-unittests)], $value)
2871 test "x$enable_asserts_in_tests" = "xno" && value=1 || value=0
2872 PPRINT_PROP_BOOL([assert()s enabled (--enable-asserts-in-tests, dev only)], $value)
2874 test "x$enable_coverage" = "xyes" && value=1 || value=0
2875 PPRINT_PROP_BOOL([Code Coverage (--enable-coverage)], $value)
2877 test "x$enable_libfuzzer" = "xyes" && value=1 || value=0
2878 PPRINT_PROP_BOOL([libFuzzer support (--enable-libfuzzer)], $value)
2880 test "x$enable_oss_fuzz" = "xyes" && value=1 || value=0
2881 PPRINT_PROP_BOOL([OSS-Fuzz support (--enable-oss-fuzz)], $value)
2883 AS_ECHO
2884 PPRINT_SUBTITLE([Tracing (--enable-tracing-instrumentation-<type>)])
2886 test "x$enable_tracing_instrumentation_log_debug" = "xyes" && value=1 || value=0
2887 PPRINT_PROP_BOOL([Tracepoints to log_debug() (log-debug)], $value)
2889 test "x$enable_tracing_instrumentation_usdt" = "xyes" && value=1 || value=0
2890 PPRINT_PROP_BOOL([USDT Instrumentation (usdt)], $value)
2892 test "x$enable_tracing_instrumentation_lttng" = "xyes" && value=1 || value=0
2893 PPRINT_PROP_BOOL([LTTng Instrumentation (lttng)], $value)
2895 AS_ECHO
2896 PPRINT_SUBTITLE([Install Directories])
2898 report_mandir="`eval eval echo $mandir`"
2899 PPRINT_PROP_STRING([Binaries], [$BINDIR])
2900 PPRINT_PROP_STRING([Configuration], [$CONFDIR])
2901 PPRINT_PROP_STRING([Man Pages], [$report_mandir])
2903 AS_ECHO
2904 AS_ECHO(["Configure Line: ./configure $configure_flags"])
2906 if test "$tor_ac_n_warnings" != "0"; then
2907 AS_ECHO
2908 PPRINT_WARN([
2909 Encountered $tor_ac_n_warnings warning(s). See messages above for more info.
2910 ])
2911 fi