configure.ac 93.2 KB
Newer Older
Roger Dingledine's avatar
Roger Dingledine committed
1
dnl Copyright (c) 2001-2004, Roger Dingledine
2
dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
Nick Mathewson's avatar
Nick Mathewson committed
3
dnl Copyright (c) 2007-2019, The Tor Project, Inc.
Nick Mathewson's avatar
Nick Mathewson committed
4
dnl See LICENSE for licensing information
5

6
AC_PREREQ([2.63])
Nick Mathewson's avatar
Nick Mathewson committed
7
AC_INIT([tor],[0.4.5.2-alpha-dev])
8
AC_CONFIG_SRCDIR([src/app/main/tor_main.c])
9
AC_CONFIG_MACRO_DIR([m4])
10

11
12
configure_flags="$*"

13
14
15
16
17
18
# DO NOT EDIT THIS DEFINITION BY HAND UNLESS YOU KNOW WHAT YOU'RE DOING.
#
# The update_versions.py script updates this definition when the
# version number changes.  Tor uses it to make sure that it
# only shuts down for missing "required protocols" when those protocols
# are listed as required by a consensus after this date.
Nick Mathewson's avatar
Nick Mathewson committed
19
AC_DEFINE(APPROX_RELEASE_DATE, ["2020-11-23"], # for 0.4.5.2-alpha-dev
20
21
          [Approximate date when this software was released. (Updated when the version changes.)])

22
23
24
# "foreign" means we don't follow GNU package layout standards
# "1.11" means we require automake version 1.11 or newer
# "subdir-objects" means put .o files in the same directory as the .c files
25
AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
26

27
28
29
30
31
tor_ac_n_warnings=0
tor_incr_n_warnings() {
  tor_ac_n_warnings=`expr $tor_ac_n_warnings + 1`
}

32
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
33
AC_CONFIG_HEADERS([orconfig.h])
34

35
AC_USE_SYSTEM_EXTENSIONS
36
37
AC_CANONICAL_HOST

38
PKG_PROG_PKG_CONFIG
39
if test "x$PKG_CONFIG" = "x" ; then
40
    pkg_config_user_action="install pkg-config, and check the PKG_CONFIG_PATH environment variable"
41
    AC_MSG_NOTICE([Some libraries need pkg-config, including systemd, nss, lzma, zstd, and custom mallocs.])
42
    AC_MSG_NOTICE([To use those libraries, $pkg_config_user_action.])
43
else
44
    pkg_config_user_action="check the PKG_CONFIG_PATH environment variable"
45
fi
46

47
48
49
50
51
if test "x$PKG_CONFIG_PATH" = "x" && test "x$prefix" != "xNONE" && test "$host" != "$build"; then
   export PKG_CONFIG_PATH=$prefix/lib/pkgconfig
   AC_MSG_NOTICE([set PKG_CONFIG_PATH=$PKG_CONFIG_PATH to support cross-compiling])
fi

52
AC_ARG_ENABLE(openbsd-malloc,
53
   AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD.  Linux only. Deprecated: see --with-malloc]))
54
AC_ARG_ENABLE(static-openssl,
55
   AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
56
AC_ARG_ENABLE(static-libevent,
57
   AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
58
AC_ARG_ENABLE(static-zlib,
59
   AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
60
AC_ARG_ENABLE(static-tor,
61
   AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
62
AC_ARG_ENABLE(unittests,
63
   AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
64
AC_ARG_ENABLE(coverage,
65
   AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
66
67
AC_ARG_ENABLE(asserts-in-tests,
   AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
68
AC_ARG_ENABLE(system-torrc,
69
   AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
Nick Mathewson's avatar
Nick Mathewson committed
70
AC_ARG_ENABLE(libfuzzer,
71
72
73
   AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
AC_ARG_ENABLE(oss-fuzz,
   AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
74
75
AC_ARG_ENABLE(memory-sentinels,
   AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
76
77
AC_ARG_ENABLE(rust,
   AS_HELP_STRING(--enable-rust, [enable rust integration]))
78
79
AC_ARG_ENABLE(cargo-online-mode,
   AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
80
81
AC_ARG_ENABLE(restart-debugging,
   AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
82
83
AC_ARG_ENABLE(zstd-advanced-apis,
   AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
84
85
AC_ARG_ENABLE(nss,
   AS_HELP_STRING(--enable-nss, [Use Mozilla's NSS TLS library. (EXPERIMENTAL)]))
86
87
AC_ARG_ENABLE(pic,
   AS_HELP_STRING(--enable-pic, [Build Tor's binaries as position-independent code, suitable to link as a library.]))
88

89
AC_ARG_ENABLE(missing-doc-warnings,
90
   AS_HELP_STRING(--enable-missing-doc-warnings, [Tell doxygen to warn about missing documentation. Makes doxygen warnings nonfatal.]))
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106

if test "$enable_missing_doc_warnings" = "yes"; then
   DOXYGEN_FATAL_WARNINGS=NO
   DOXYGEN_WARN_ON_MISSING=YES
elif test "$enable_fatal_warnings" = "yes"; then
   # Fatal warnings from doxygen are nice, but not if we're warning about
   # missing documentation.
   DOXYGEN_FATAL_WARNINGS=YES
   DOXYGEN_WARN_ON_MISSING=NO
else
   DOXYGEN_FATAL_WARNINGS=NO
   DOXYGEN_WARN_ON_MISSING=NO
fi
AC_SUBST(DOXYGEN_FATAL_WARNINGS)
AC_SUBST(DOXYGEN_WARN_ON_MISSING)

107
if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
108
109
110
    AC_MSG_ERROR([Can't disable assertions outside of coverage build])
fi

111
112
113
AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
Nick Mathewson's avatar
Nick Mathewson committed
114
AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
115
AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
116
AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
117
AM_CONDITIONAL(USE_NSS, test "x$enable_nss" = "xyes")
118
AM_CONDITIONAL(USE_OPENSSL, test "x$enable_nss" != "xyes")
119
120
121

if test "x$enable_nss" = "xyes"; then
  AC_DEFINE(ENABLE_NSS, 1,
122
  	    [Defined if we're building with NSS.])
123
124
125
else
  AC_DEFINE(ENABLE_OPENSSL, 1,
            [Defined if we're building with OpenSSL or LibreSSL])
126
fi
127

128
129
130
131
if test "$enable_static_tor" = "yes"; then
  enable_static_libevent="yes";
  enable_static_openssl="yes";
  enable_static_zlib="yes";
132
  TOR_STATIC_LDFLAGS="-static"
133
fi
134
AC_SUBST(TOR_STATIC_LDFLAGS)
135

136
137
138
139
140
if test "$enable_system_torrc" = "no"; then
  AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
            [Defined if we're not going to look for a torrc in SYSCONF])
fi

141
142
143
144
145
if test "$enable_memory_sentinels" = "no"; then
  AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
           [Defined if we're turning off memory safety code to look for bugs])
fi

146
147
148
149
150
151
AC_ARG_ENABLE(manpage,
              AS_HELP_STRING(--disable-manpage, [Disable manpage generation.]))

AC_ARG_ENABLE(html-manual,
              AS_HELP_STRING(--disable-html-manual, [Disable HTML documentation.]))

152
AC_ARG_ENABLE(asciidoc,
153
     AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
154
     [case "${enableval}" in
155
156
        "yes") asciidoc=true ;;
        "no")  asciidoc=false ;;
157
158
159
        *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
      esac], [asciidoc=true])

160
161
# systemd notify support
AC_ARG_ENABLE(systemd,
162
      AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
163
      [case "${enableval}" in
164
165
        "yes") systemd=true ;;
        "no")  systemd=false ;;
166
167
168
        * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
      esac], [systemd=auto])

169
170
171
172
if test "$enable_restart_debugging" = "yes"; then
  AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
            [Defined if we're building with support for in-process restart debugging.])
fi
173

174
175
176
177
if test "$enable_zstd_advanced_apis" != "no"; then
   AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
             [Defined if we're going to try to use zstd's "static-only" APIs.])
fi
178
179

# systemd support
180
if test "x$enable_systemd" = "xno"; then
181
182
183
184
185
186
    have_systemd=no;
else
    PKG_CHECK_MODULES(SYSTEMD,
        [libsystemd-daemon],
        have_systemd=yes,
        have_systemd=no)
187
    if test "x$have_systemd" = "xno"; then
188
189
190
191
192
193
        AC_MSG_NOTICE([Okay, checking for systemd a different way...])
        PKG_CHECK_MODULES(SYSTEMD,
            [libsystemd],
            have_systemd=yes,
            have_systemd=no)
    fi
194
195
fi

196
if test "x$have_systemd" = "xyes"; then
197
    AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
198
    TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
199
    TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
200
    PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
201
         [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or greater])], [])
202
fi
203
AC_SUBST(TOR_SYSTEMD_CFLAGS)
204
205
AC_SUBST(TOR_SYSTEMD_LIBS)

206
if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
207
    AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found, $pkg_config_user_action, or set SYSTEMD_CFLAGS and SYSTEMD_LIBS.])
208
209
fi

210
case "$host" in
211
212
213
214
215
   *-*-solaris* )
     AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
     ;;
esac

216
AC_ARG_ENABLE(gcc-warnings,
217
218
219
     AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
AC_ARG_ENABLE(fatal-warnings,
     AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
220
AC_ARG_ENABLE(gcc-warnings-advisory,
221
     AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
222

223
224
dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
AC_ARG_ENABLE(gcc-hardening,
225
    AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
226

227
dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
228
AC_ARG_ENABLE(expensive-hardening,
229
230
231
232
233
    AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
AC_ARG_ENABLE(fragile-hardening,
    AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  fragile_hardening="yes"
234
  AC_DEFINE(DEBUG_SMARTLIST, 1, [Enable smartlist debugging])
235
fi
236

237
238
239
240
241
242
243
AC_ARG_ENABLE(all-bugs-are-fatal,
   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]))

if test "x$enable_all_bugs_are_fatal" = "xyes"; then
  AC_DEFINE(ALL_BUGS_ARE_FATAL, 1, [All assert failures are fatal])
fi

244
245
246
dnl Linker hardening options
dnl Currently these options are ELF specific - you can't use this with MacOSX
AC_ARG_ENABLE(linker-hardening,
247
    AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
248

249
AC_ARG_ENABLE(local-appdata,
250
   AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
251
252
253
254
255
if test "$enable_local_appdata" = "yes"; then
  AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
            [Defined if we default to host local appdata paths on Windows])
fi

256
AC_ARG_ENABLE(tool-name-check,
257
     AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
258

259
AC_ARG_ENABLE(seccomp,
260
     AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
261

262
AC_ARG_ENABLE(libscrypt,
263
     AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
264

265
dnl --- Tracing Options. ---
266

267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
TOR_TRACE_LIBS=

dnl LTTng instrumentation option.
AC_ARG_ENABLE(tracing-instrumentation-lttng,
              AS_HELP_STRING([--enable-tracing-instrumentation-lttng],
                             [build with LTTng-UST instrumentation]))
AM_CONDITIONAL([USE_TRACING_INSTRUMENTATION_LTTNG],
               [test "x$enable_tracing_instrumentation_lttng" = "xyes"])

if test "x$enable_tracing_instrumentation_lttng" = "xyes"; then
  AC_CHECK_HEADERS([lttng/tracepoint.h], [],
                   [AC_MSG_ERROR([LTTng instrumentation headers not found.
                                  On Debian, apt install liblttng-ust-dev"])], [])
  AC_DEFINE([USE_TRACING_INSTRUMENTATION_LTTNG], [1], [Using LTTng instrumentation])
  TOR_TRACE_LIBS="-llttng-ust -ldl"
282
  have_tracing=1
283
284
fi

285
286
287
288
289
290
291
292
293
294
295
dnl USDT instrumentation option.
AC_ARG_ENABLE(tracing-instrumentation-usdt,
              AS_HELP_STRING([--enable-tracing-instrumentation-usdt],
                             [build with tracing USDT instrumentation]))
AM_CONDITIONAL([USE_TRACING_INSTRUMENTATION_USDT],
               [test "x$enable_tracing_instrumentation_usdt" = "xyes"])

if test "x$enable_tracing_instrumentation_usdt" = "xyes"; then
  AC_CHECK_HEADERS([sys/sdt.h], [],
                   [AC_MSG_ERROR([USDT instrumentation requires sys/sdt.h header.
                                  On Debian, apt install systemtap-sdt-dev])], [])
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
  AC_MSG_CHECKING([STAP_PROBEV()])
  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
    #define SDT_USE_VARIADIC
    #include <sys/sdt.h>
    void test(void)
    {
      STAP_PROBEV(p, n, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
    }
  ]])], [
    AC_MSG_RESULT([yes])
    dnl LTTng generates USDT probes if the UST library was built with
    dnl --with-sdt. There is unfortunately no way to check that so we always
    dnl build the USDT probes even though LTTng instrumentation was requested.
    AC_DEFINE([USE_TRACING_INSTRUMENTATION_USDT], [1], [Using USDT instrumentation])
    have_tracing=1
  ], [
    AC_MSG_RESULT([no])
    AC_MSG_ERROR([USDT tracing support requires STAP_PROBEV()])
  ])
315
316
fi

317
318
319
320
321
322
323
324
dnl Tracepoints event to debug logs.
AC_ARG_ENABLE(tracing-instrumentation-log-debug,
     AS_HELP_STRING([--enable-tracing-instrumentation-log-debug],
                    [build with tracing event to debug log]),
     AC_DEFINE([USE_TRACING_INSTRUMENTATION_LOG_DEBUG], [1],
               [Tracepoints to log debug]), [])
AM_CONDITIONAL([USE_TRACING_INSTRUMENTATION_LOG_DEBUG],
               [test "x$enable_tracing_instrumentation_log_debug" = "xyes"])
325
326
327
if test "x$enable_tracing_instrumentation_log_debug" = "xyes"; then
  have_tracing=1
fi
328

329
dnl Define that tracing is supported if any instrumentation is used.
330
331
AM_COND_IF([USE_TRACING_INSTRUMENTATION_LOG_DEBUG],
           AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
332
333
AM_COND_IF([USE_TRACING_INSTRUMENTATION_USDT],
           AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
334
335
AM_COND_IF([USE_TRACING_INSTRUMENTATION_LTTNG],
           AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
336
AM_CONDITIONAL([USE_TRACING], [test "x$have_tracing" = x1 ])
337
338
339

dnl Finally, define the trace libs.
AC_SUBST([TOR_TRACE_LIBS])
340
341

dnl -- End Tracing Options. --
342

343
344
345
346
347
348
349
350
351
352
dnl Enable Android only features.
AC_ARG_ENABLE(android,
     AS_HELP_STRING(--enable-android, [build with Android features enabled]))
AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])

if test "x$enable_android" = "xyes"; then
  AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])

fi

353
354
355
356
dnl ---
dnl Tor modules options. These options are namespaced with --disable-module-XXX
dnl ---

357
dnl All our modules.
Nick Mathewson's avatar
Nick Mathewson committed
358
m4_define(MODULES, relay dirauth dircache)
359
360
361
362

dnl Relay module.
AC_ARG_ENABLE([module-relay],
              AS_HELP_STRING([--disable-module-relay],
363
                             [Build tor without the Relay modules: tor can not run as a relay, bridge, or authority. Implies --disable-module-dirauth]))
364
365
366
367
AM_CONDITIONAL(BUILD_MODULE_RELAY, [test "x$enable_module_relay" != "xno"])
AM_COND_IF(BUILD_MODULE_RELAY,
           AC_DEFINE([HAVE_MODULE_RELAY], [1],
                     [Compile with Relay feature support]))
368

Nick Mathewson's avatar
Nick Mathewson committed
369
dnl Dircache module.  (This cannot be enabled or disabled independently of
370
dnl the relay module.  It is not listed by --list-modules for this reason.)
Nick Mathewson's avatar
Nick Mathewson committed
371
372
373
374
375
376
AM_CONDITIONAL(BUILD_MODULE_DIRCACHE,
               [test "x$enable_module_relay" != "xno"])
AM_COND_IF(BUILD_MODULE_DIRCACHE,
           AC_DEFINE([HAVE_MODULE_DIRCACHE], [1],
                     [Compile with directory cache support]))

377
378
379
dnl Directory Authority module.
AC_ARG_ENABLE([module-dirauth],
              AS_HELP_STRING([--disable-module-dirauth],
380
                             [Build tor without the Directory Authority module: tor can not run as a directory authority or bridge authority]))
381
AM_CONDITIONAL(BUILD_MODULE_DIRAUTH,[test "x$enable_module_dirauth" != "xno" && test "x$enable_module_relay" != "xno"])
382
383
384
AM_COND_IF(BUILD_MODULE_DIRAUTH,
           AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
                     [Compile with Directory Authority feature support]))
385

386
387
388
389
390
391
392
393
394
dnl Helper variables.
TOR_MODULES_ALL_ENABLED=
AC_DEFUN([ADD_MODULE], [
    MODULE=m4_toupper($1)
    TOR_MODULES_ALL_ENABLED="${TOR_MODULES_ALL_ENABLED} -DHAVE_MODULE_${MODULE}=1"
])
m4_foreach_w([module], MODULES, [ADD_MODULE([module])])
AC_SUBST(TOR_MODULES_ALL_ENABLED)

395
396
397
398
399
400
401
402
403
dnl check for the correct "ar" when cross-compiling.
dnl   (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
dnl    so kludge up a replacement for the case where it isn't there yet.)
m4_ifdef([AM_PROG_AR],
         [AM_PROG_AR],
         [AN_MAKEVAR([AR], [AC_PROG_AR])
          AN_PROGRAM([ar], [AC_PROG_AR])
          AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
          AC_PROG_AR])
404

405
406
407
408
409
410
dnl Check whether the above macro has settled for a simply named tool even
dnl though we're cross compiling. We must do this before running AC_PROG_CC,
dnl because that will find any cc on the system, not only the cross-compiler,
dnl and then verify that a binary built with this compiler runs on the
dnl build system. It will then come to the false conclusion that we're not
dnl cross-compiling.
411
412
if test "x$enable_tool_name_check" != "xno"; then
    if test "x$ac_tool_warned" = "xyes"; then
413
        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.)])
414
	elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
415
416
417
418
		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.)])
	fi
fi

419
AC_PROG_CC
420
AC_PROG_CPP
421
422
AC_PROG_MAKE_SET
AC_PROG_RANLIB
423
AC_PROG_SED
424

425
426
427
AC_ARG_VAR([PERL], [path to Perl binary])
AC_CHECK_PROGS([PERL], [perl])
AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
428

429
430
dnl check for asciidoc and a2x
AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
431
AC_PATH_PROGS([A2X], [a2x a2x.py], none)
432

433
AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
434
435
AM_CONDITIONAL(BUILD_MANPAGE, [test "x$enable_manpage" != "xno"])
AM_CONDITIONAL(BUILD_HTML_DOCS, [test "x$enable_html_manual" != "xno"])
436

437
AM_PROG_CC_C_O
438
AC_PROG_CC_C99
439

Nick Mathewson's avatar
Nick Mathewson committed
440
441
AC_CACHE_CHECK([for Python 3], [tor_cv_PYTHON],
   [AC_PATH_PROGS_FEATURE_CHECK([PYTHON], [ \
442
443
	python3 \
	python3.8 python3.7 python3.6 python3.5 python3.4 \
Nick Mathewson's avatar
Nick Mathewson committed
444
445
446
447
448
449
	python ],
   [["$ac_path_PYTHON" -c 'import sys; sys.exit(sys.version_info[0]<3)' && tor_cv_PYTHON="$ac_path_PYTHON" ac_path_PYTHON_found=:]] )])
AC_SUBST([PYTHON], [$tor_cv_PYTHON])

PYTHON="$tor_cv_PYTHON"

450
if test "x$PYTHON" = "x"; then
451
  tor_incr_n_warnings
Nick Mathewson's avatar
Nick Mathewson committed
452
  AC_MSG_WARN([Python 3 unavailable; some tests will not be run.])
453
fi
Nick Mathewson's avatar
Nick Mathewson committed
454

455
456
AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])

457
dnl List all external rust crates we depend on here. Include the version
458
459
460
461
rust_crates=" \
    digest-0.7.2 \
    libc-0.2.39 \
"
462
AC_SUBST(rust_crates)
463

464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
AC_C_FLEXIBLE_ARRAY_MEMBER
], [
 dnl Maybe we've got an old autoconf...
 AC_CACHE_CHECK([for flexible array members],
     tor_cv_c_flexarray,
     [AC_COMPILE_IFELSE(
       AC_LANG_PROGRAM([
 struct abc { int a; char b[]; };
], [
 struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
 def->b[0] = 33;
]),
  [tor_cv_c_flexarray=yes],
  [tor_cv_c_flexarray=no])])
479
 if test "$tor_cv_flexarray" = "yes"; then
480
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
481
 else
482
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
483
484
485
 fi
])

486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
      tor_cv_c_c99_decl,
      [AC_COMPILE_IFELSE(
         [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
	 [tor_cv_c_c99_decl=yes],
	 [tor_cv_c_c99_decl=no] )])
if test "$tor_cv_c_c99_decl" != "yes"; then
  AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
fi

AC_CACHE_CHECK([for working C99 designated initializers],
      tor_cv_c_c99_designated_init,
      [AC_COMPILE_IFELSE(
         [AC_LANG_PROGRAM([struct s { int a; int b; };],
  	       [[ struct s ss = { .b = 5, .a = 6 }; ]])],
	 [tor_cv_c_c99_designated_init=yes],
	 [tor_cv_c_c99_designated_init=no] )])

if test "$tor_cv_c_c99_designated_init" != "yes"; then
  AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
fi

Nick Mathewson's avatar
Nick Mathewson committed
508
509
510
511
512
513
514
515
516
517
518
519
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
AC_CACHE_CHECK([for __attribute__((fallthrough))],
      tor_cv_c_attr_fallthrough,
      [AC_COMPILE_IFELSE(
         [AC_LANG_PROGRAM([extern int x; void fn(void) ;],
	       [[ switch (x) { case 1: fn(); __attribute__((fallthrough));
                               case 2: fn(); break; } ]])],
	 [tor_cv_c_attr_fallthrough=yes],
	 [tor_cv_c_attr_fallthrough=no] )])
CFLAGS="$saved_CFLAGS"

520
if test "$tor_cv_c_attr_fallthrough" = "yes"; then
Nick Mathewson's avatar
Nick Mathewson committed
521
522
523
  AC_DEFINE(HAVE_ATTR_FALLTHROUGH, [1], [defined if we have the fallthrough attribute.])
fi

524
525
TORUSER=_tor
AC_ARG_WITH(tor-user,
526
        AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
527
528
529
530
531
532
533
534
        [
           TORUSER=$withval
        ]
)
AC_SUBST(TORUSER)

TORGROUP=_tor
AC_ARG_WITH(tor-group,
535
        AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
536
537
538
539
540
541
        [
           TORGROUP=$withval
        ]
)
AC_SUBST(TORGROUP)

542

543
dnl If _WIN32 is defined and non-zero, we are building for win32
544
AC_MSG_CHECKING([for win32])
545
AC_RUN_IFELSE([AC_LANG_SOURCE([
546
int main(int c, char **v) {
547
548
#ifdef _WIN32
#if _WIN32
549
550
551
552
553
554
555
  return 0;
#else
  return 1;
#endif
#else
  return 2;
#endif
556
}])],
557
bwin32=true; AC_MSG_RESULT([yes]),
558
559
bwin32=false; AC_MSG_RESULT([no]),
bwin32=cross; AC_MSG_RESULT([cross])
560
561
)

562
if test "$bwin32" = "cross"; then
563
AC_MSG_CHECKING([for win32 (cross)])
564
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
565
#ifdef _WIN32
566
567
568
569
570
int main(int c, char **v) {return 0;}
#else
#error
int main(int c, char **v) {return x(y);}
#endif
571
])],
572
573
574
575
bwin32=true; AC_MSG_RESULT([yes]),
bwin32=false; AC_MSG_RESULT([no]))
fi

576
577
AH_BOTTOM([
#ifdef _WIN32
578
/* Defined to access windows functions and definitions for >=WinVista */
579
# ifndef WINVER
580
#  define WINVER 0x0600
581
582
# endif

583
/* Defined to access _other_ windows functions and definitions for >=WinVista */
584
# ifndef _WIN32_WINNT
585
#  define _WIN32_WINNT 0x0600
586
587
588
589
590
591
592
593
594
# endif

/* Defined to avoid including some windows headers as part of Windows.h */
# ifndef WIN32_LEAN_AND_MEAN
#  define WIN32_LEAN_AND_MEAN 1
# endif
#endif
])

595
AM_CONDITIONAL(WIN32, test "x$bwin32" = "xtrue")
596
AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
597
AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
598

599
600
dnl Enable C99 when compiling with MIPSpro
AC_MSG_CHECKING([for MIPSpro compiler])
601
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
602
603
604
605
#if (defined(__sgi) && defined(_COMPILER_VERSION))
#error
  return x(y);
#endif
606
])],
607
bmipspro=false; AC_MSG_RESULT(no),
608
bmipspro=true; AC_MSG_RESULT(yes))
609

610
if test "$bmipspro" = "true"; then
611
612
613
  CFLAGS="$CFLAGS -c99"
fi

614
615
AC_C_BIGENDIAN

Alex Xu's avatar
Alex Xu committed
616
617
AC_ARG_VAR([TOR_RUST_TARGET], [Rust target, must be specified when cross-compiling (HOST != BUILD). example: i686-pc-windows-gnu])

618
619
620
621
622
623
624
625
626
627
628
629
630
631
if test "x$enable_rust" = "xyes"; then
  AC_ARG_VAR([RUSTC], [path to the rustc binary])
  AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  if test "x$RUSTC" = "xno"; then
    AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  fi

  AC_ARG_VAR([CARGO], [path to the cargo binary])
  AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  if test "x$CARGO" = "xno"; then
    AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  fi

  AC_DEFINE([HAVE_RUST], 1, [have Rust])
632
633
634
635
636
  if test "x$enable_fatal_warnings" = "xyes"; then
    RUST_WARN=
  else
    RUST_WARN=#
  fi
637
638
639
640
641
642
643
644
645
646
  if test "x$enable_cargo_online_mode" = "xyes"; then
    CARGO_ONLINE=
    RUST_DL=#
  else
    CARGO_ONLINE=--frozen
    RUST_DL=

    dnl When we're not allowed to touch the network, we need crate dependencies
    dnl locally available.
    AC_MSG_CHECKING([rust crate dependencies])
647
648
    AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
    if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
649
      TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
650
    fi
651
    dnl Check whether the path exists before we try to cd into it.
652
653
    if test ! -d "$TOR_RUST_DEPENDENCIES"; then
      AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
654
      ERRORED=1
655
    fi
656
657
658
659
    dnl Make the path absolute, since we'll be using it from within a
    dnl subdirectory.
    TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)

660
    for dep in $rust_crates; do
661
662
      if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
        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.])
663
        ERRORED=1
664
665
      fi
    done
666
667
668
    if test "x$ERRORED" = "x"; then
      AC_MSG_RESULT([yes])
    fi
669
670
671
672
673
  fi

  dnl For now both MSVC and MinGW rust libraries will output static libs with
  dnl the MSVC naming convention.
  if test "$bwin32" = "true"; then
Alex Xu's avatar
Alex Xu committed
674
    tor_rust_static_name=tor_rust.lib
675
  else
Alex Xu's avatar
Alex Xu committed
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
    tor_rust_static_name=libtor_rust.a
  fi

  AC_CANONICAL_BUILD

  if test -n "$TOR_RUST_TARGET"; then
    if test "$host" = "$build"; then
      AC_MSG_ERROR([HOST = BUILD is invalid if TOR_RUST_TARGET is specified, see configure --help for more information.])
    fi
    RUST_TARGET_PROP="target = '$TOR_RUST_TARGET'"
    TOR_RUST_LIB_PATH="src/rust/target/$TOR_RUST_TARGET/release/$tor_rust_static_name"
  else
    if test "$host" != "$build"; then
      AC_MSG_ERROR([TOR_RUST_TARGET must be specified when cross-compiling with Rust enabled.])
    fi
    RUST_TARGET_PROP=
    TOR_RUST_LIB_PATH="src/rust/target/release/$tor_rust_static_name"
693
694
  fi

Alex Xu's avatar
Alex Xu committed
695
696
  AC_SUBST(RUST_TARGET_PROP)
  AC_SUBST(TOR_RUST_LIB_PATH)
697
  AC_SUBST(CARGO_ONLINE)
698
  AC_SUBST(RUST_WARN)
699
700
701
702
  AC_SUBST(RUST_DL)

  dnl Let's check the rustc version, too
  AC_MSG_CHECKING([rust version])
703
  RUSTC_VERSION=`$RUSTC --version`
704
705
706
707
708
  RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
    AC_MSG_ERROR([rustc version couldn't be identified])
  fi
709
710
  if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 31; then
    AC_MSG_ERROR([rustc must be at least version 1.31.0])
711
  fi
712
  AC_MSG_RESULT([$RUSTC_VERSION])
713
714
fi

715
AC_SEARCH_LIBS(socket, [socket network])
716
AC_SEARCH_LIBS(gethostbyname, [nsl])
717
AC_SEARCH_LIBS(dlopen, [dl])
718
AC_SEARCH_LIBS(inet_aton, [resolv])
719
AC_SEARCH_LIBS(backtrace, [execinfo])
720
721
722
723
724
725
saved_LIBS="$LIBS"
AC_SEARCH_LIBS([clock_gettime], [rt])
if test "$LIBS" != "$saved_LIBS"; then
   # Looks like we need -lrt for clock_gettime().
   have_rt=yes
fi
726

727
728
729
730
if test "$bwin32" = "false"; then
  AC_SEARCH_LIBS(pthread_create, [pthread])
  AC_SEARCH_LIBS(pthread_detach, [pthread])
fi
731

732
733
AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
734

735
AC_CHECK_FUNCS(
Nick Mathewson's avatar
Nick Mathewson committed
736
	_NSGetEnviron \
737
738
	RtlSecureZeroMemory \
	SecureZeroMemory \
Nick Mathewson's avatar
Nick Mathewson committed
739
740
741
	accept4 \
	backtrace \
	backtrace_symbols_fd \
742
	eventfd \
743
	explicit_bzero \
744
	timingsafe_memcmp \
Nick Mathewson's avatar
Nick Mathewson committed
745
	flock \
746
	fsync \
Nick Mathewson's avatar
Nick Mathewson committed
747
748
749
	ftime \
	get_current_dir_name \
	getaddrinfo \
750
	getdelim \
Nick Mathewson's avatar
Nick Mathewson committed
751
	getifaddrs \
752
	getline \
Nick Mathewson's avatar
Nick Mathewson committed
753
754
755
	getrlimit \
	gettimeofday \
	gmtime_r \
756
	gnu_get_libc_version \
Nick Mathewson's avatar
Nick Mathewson committed
757
758
759
760
761
762
	inet_aton \
	ioctl \
	issetugid \
	llround \
	localtime_r \
	lround \
763
	madvise \
Nick Mathewson's avatar
Nick Mathewson committed
764
765
	memmem \
	memset_s \
766
	minherit \
Nick Mathewson's avatar
Nick Mathewson committed
767
	mmap \
768
769
	pipe \
	pipe2 \
Nick Mathewson's avatar
Nick Mathewson committed
770
	prctl \
771
	readpassphrase \
Nick Mathewson's avatar
Nick Mathewson committed
772
773
774
	rint \
	sigaction \
	socketpair \
775
	statvfs \
Nick Mathewson's avatar
Nick Mathewson committed
776
777
778
779
	strncasecmp \
	strcasecmp \
	strlcat \
	strlcpy \
780
	strnlen \
Nick Mathewson's avatar
Nick Mathewson committed
781
782
783
784
	strptime \
	strtok_r \
	strtoull \
	sysconf \
785
	sysctl \
Nick Mathewson's avatar
Nick Mathewson committed
786
	truncate \
Nick Mathewson's avatar
Nick Mathewson committed
787
	uname \
788
	usleep \
Nick Mathewson's avatar
Nick Mathewson committed
789
	vasprintf \
790
	_vscprintf
791
)
792

793
# Apple messed up when they added some functions: they
794
# forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
# checks.

# We should only probe for these functions if we are sure that we
# are not targeting OS X 10.9 or earlier.
AC_MSG_CHECKING([for a pre-Yosemite OS X build target])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifdef __APPLE__
#  include <AvailabilityMacros.h>
#  ifndef MAC_OS_X_VERSION_10_10
#    define MAC_OS_X_VERSION_10_10 101000
#  endif
#  if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
#    if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
#      error "Running on Mac OS X 10.9 or earlier"
#    endif
#  endif
#endif
]], [[]])],
   [on_macos_pre_10_10=no ; AC_MSG_RESULT([no])],
   [on_macos_pre_10_10=yes; AC_MSG_RESULT([yes])])

if test "$on_macos_pre_10_10" = "no"; then
  AC_CHECK_FUNCS(
        mach_approximate_time \
  )
fi

# We should only probe for these functions if we are sure that we
823
# are not targeting OSX 10.11 or earlier.
824
AC_MSG_CHECKING([for a pre-Sierra OSX build target])
825
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
826
827
#ifdef __APPLE__
#  include <AvailabilityMacros.h>
828
829
#  ifndef MAC_OS_X_VERSION_10_12
#    define MAC_OS_X_VERSION_10_12 101200
830
831
#  endif
#  if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
832
#    if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
833
834
835
836
#      error "Running on Mac OSX 10.11 or earlier"
#    endif
#  endif
#endif
837
]], [[]])],
838
839
840
841
842
843
844
845
846
847
   [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
   [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])

if test "$on_macos_pre_10_12" = "no"; then
  AC_CHECK_FUNCS(
        clock_gettime \
        getentropy \
  )
fi

848
if test "$bwin32" != "true"; then
849
850
  AC_CHECK_HEADERS(pthread.h)
  AC_CHECK_FUNCS(pthread_create)
851
  AC_CHECK_FUNCS(pthread_condattr_setclock)
852
853
fi

854
if test "$bwin32" = "true"; then
855
856
857
858
859
860
861
  AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
#include <windows.h>
#include <conio.h>
#include <wchar.h>
                 ])
fi

862
863
AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
864

865
866
AC_CHECK_FUNCS(glob)

867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
AC_MSG_CHECKING([whether free(NULL) works])
AC_RUN_IFELSE([AC_LANG_PROGRAM([
  #include <stdlib.h>
], [
char *p = NULL;
free(p);
])],
[free_null_ok=true; AC_MSG_RESULT(yes)],
[free_null_ok=false; AC_MSG_RESULT(no)],
[free_null_ok=cross; AC_MSG_RESULT(cross)])

if test "$free_null_ok" = "false"; then
   AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
fi

882
dnl ------------------------------------------------------
883
dnl Where do you live, libevent?  And how do we call you?
884

885
if test "$bwin32" = "true"; then
886
  TOR_LIB_WS32=-lws2_32
887
  TOR_LIB_IPHLPAPI=-liphlpapi
888
  TOR_LIB_SHLWAPI=-lshlwapi
889
890
  # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  # think it's actually necessary.
891
  TOR_LIB_GDI=-lgdi32
892
  TOR_LIB_USERENV=-luserenv
893
894
  TOR_LIB_BCRYPT=-lbcrypt
  TOR_LIB_CRYPT32=-lcrypt32
Nick Mathewson's avatar
   
Nick Mathewson committed
895
else
896
897
  TOR_LIB_WS32=
  TOR_LIB_GDI=
898
  TOR_LIB_USERENV=
Nick Mathewson's avatar
   
Nick Mathewson committed
899
fi
900
901
AC_SUBST(TOR_LIB_WS32)
AC_SUBST(TOR_LIB_GDI)
902
AC_SUBST(TOR_LIB_IPHLPAPI)
903
904
AC_SUBST(TOR_LIB_BCRYPT)
AC_SUBST(TOR_LIB_CRYPT32)
905
AC_SUBST(TOR_LIB_SHLWAPI)
906
AC_SUBST(TOR_LIB_USERENV)
Nick Mathewson's avatar
   
Nick Mathewson committed
907

908
tor_libevent_pkg_redhat="libevent"
909
tor_libevent_pkg_debian="libevent-dev"
910
911
912
tor_libevent_devpkg_redhat="libevent-devel"
tor_libevent_devpkg_debian="libevent-dev"

913
914
915
916
dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
dnl linking for static builds.
STATIC_LIBEVENT_FLAGS=""
if test "$enable_static_libevent" = "yes"; then
917
    if test "$have_rt" = "yes"; then
918
919
920
921
      STATIC_LIBEVENT_FLAGS=" -lrt "
    fi
fi

922
TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_IPHLPAPI $TOR_LIB_BCRYPT $TOR_LIB_WS32], [
923
#ifdef _WIN32
924
925
#include <winsock2.h>
#endif
926
#include <sys/time.h>
Roger Dingledine's avatar
Roger Dingledine committed
927
#include <sys/types.h>
928
#include <event2/event.h>], [
929
#ifdef _WIN32
930
931
#include <winsock2.h>
#endif
932
struct event_base;
933
934
struct event_base *event_base_new(void);
void event_base_free(struct event_base *);],
935
    [
936
#ifdef _WIN32
937
{WSADATA d; WSAStartup(0x101,&d); }
938
#endif
Alex Xu's avatar
Alex Xu committed
939
event_base_free(event_base_new());
940
], [--with-libevent-dir], [/opt/libevent])
941

942
dnl Determine the incantation needed to link libevent.
943
944
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
945
save_CPPFLAGS="$CPPFLAGS"
946
947

LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
948
LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
949
CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
950

951
952
AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)

953
954
955
956
if test "$enable_static_libevent" = "yes"; then
   if test "$tor_cv_library_libevent_dir" = "(system)"; then
     AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
   else
957
     TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/.libs/libevent.a $STATIC_LIBEVENT_FLAGS"
958
959
   fi
else
960
     if test "x$ac_cv_header_event2_event_h" = "xyes"; then
Nick Mathewson's avatar
Nick Mathewson committed
961
962
       AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
       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"))
963

964
       if test "$ac_cv_search_event_new" != "none required"; then
965
966
         TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
       fi
967
       if test "$ac_cv_search_evdns_base_new" != "none required"; then
968
969
970
         TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
       fi
     else
971
       AC_MSG_ERROR("libevent2 is required but the headers could not be found")
972
     fi
973
974
fi

975
976
977
dnl Now check for particular libevent functions.
AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
                evutil_secure_rng_add_bytes \
978
979
                evdns_base_get_nameserver_addr \

980
981
])

982
983
984
985
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

986
987
988
989
990
dnl Check that libevent is at least at version 2.0.10, the first stable
dnl release of its series
CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
AC_MSG_CHECKING([whether Libevent is new enough])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
991
#include <event2/event.h>
992
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
993
994
995
996
997
#error
int x = y(zz);
#else
int x = 1;
#endif
998
999
1000
1001
1002
1003
1004
1005
])], [ AC_MSG_RESULT([yes]) ],
   [ AC_MSG_RESULT([no])
     AC_MSG_ERROR([Libevent is not new enough.  We require 2.0.10-stable or later]) ] )

LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

1006
AC_SUBST(TOR_LIBEVENT_LIBS)
1007

1008
1009
1010
1011
1012
1013
1014
dnl ------------------------------------------------------
dnl Where do you live, libm?

dnl On some platforms (Haiku/BeOS) the math library is
dnl part of libroot. In which case don't link against lm
TOR_LIB_MATH=""
save_LIBS="$LIBS"
1015
1016
1017
AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
if test "$ac_cv_search_pow" != "none required"; then
    TOR_LIB_MATH="$ac_cv_search_pow"
1018
1019
1020
1021
fi
LIBS="$save_LIBS"
AC_SUBST(TOR_LIB_MATH)

1022
1023
1024
1025
1026
1027
dnl ------------------------------------------------------
dnl Hello, NSS.  You're new around here.
if test "x$enable_nss" = "xyes"; then
  PKG_CHECK_MODULES(NSS,
     [nss],
     [have_nss=yes],
1028
     [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.])])
1029
1030
1031
1032
  AC_SUBST(NSS_CFLAGS)
  AC_SUBST(NSS_LIBS)
fi

1033
dnl ------------------------------------------------------
1034
dnl Where do you live, openssl?  And how do we call you?
1035

1036
1037
if test "x$enable_nss" != "xyes"; then

1038
tor_openssl_pkg_redhat="openssl"
1039
tor_openssl_pkg_debian="libssl-dev"
1040
1041
1042
tor_openssl_devpkg_redhat="openssl-devel"
tor_openssl_devpkg_debian="libssl-dev"

1043
1044
ALT_openssl_WITHVAL=""
AC_ARG_WITH(ssl-dir,
1045
  AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
1046
  [
1047
      if test "x$withval" != "xno" && test "x$withval" != "x"; then
1048
1049
1050
1051
         ALT_openssl_WITHVAL="$withval"
      fi
  ])

1052
AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
1053
TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32 $TOR_LIB_CRYPT32],
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
    [#include <openssl/ssl.h>
     char *getenv(const char *);],
    [struct ssl_cipher_st;
     unsigned SSL_CIPHER_get_id(const struct ssl_cipher_st *);
     char *getenv(const char *);],
    dnl This funny-looking test program calls getenv, so that the compiler
    dnl will neither make code that call SSL_CIPHER_get_id(NULL) [producing
    dnl a crash], nor optimize out the call to SSL_CIPHER_get_id().
    dnl We look for SSL_cipher_get_id() because it is present in
    dnl OpenSSL >=1.0.1, because it is not deprecated, and because Tor
    dnl depends on it.
    [if (getenv("THIS_SHOULDNT_BE_SET_X201803")) SSL_CIPHER_get_id((void *)0);], [],
1066
    [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
1067

1068
1069
1070
1071
if test "$enable_static_openssl" = "yes"; then
   if test "$tor_cv_library_openssl_dir" = "(system)"; then
     AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
   else
1072
     TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a $TOR_LIB_WS32 $TOR_LIB_CRYPT32 $TOR_LIB_BCRYPT"
1073
1074
   fi
else
1075
     TOR_OPENSSL_LIBS="-lssl -lcrypto"
1076
1077
1078
fi
AC_SUBST(TOR_OPENSSL_LIBS)

1079
dnl Now validate openssl, and check for particular openssl functions.
1080
1081
1082
1083
1084
1085
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
save_CPPFLAGS="$CPPFLAGS"
LIBS="$TOR_OPENSSL_LIBS $LIBS"
LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
1086

1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
dnl Tor currently uses a number of APIs that are deprecated in OpenSSL 3.0.0
dnl and later.  We want to migrate away from them, but that will be a lot of
dnl work. (See ticket tor#40166.)  For now, we disable the deprecation
dnl warnings.

AC_MSG_CHECKING([for OpenSSL >= 3.0.0])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <openssl/opensslv.h>
#if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER <= 0x30000000L
#error "you_have_version_3"