configure.ac 91.5 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])
7
AC_INIT([tor],[0.4.5.0-alpha-dev])
8
AC_CONFIG_SRCDIR([src/app/main/tor_main.c])
9
AC_CONFIG_MACRO_DIR([m4])
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.
19
AC_DEFINE(APPROX_RELEASE_DATE, ["2020-06-09"], # for 0.4.5.0-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
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
28
AC_CONFIG_HEADERS([orconfig.h])
29

30
AC_USE_SYSTEM_EXTENSIONS
31
32
AC_CANONICAL_HOST

33
PKG_PROG_PKG_CONFIG
34
if test "x$PKG_CONFIG" = "x" ; then
35
    pkg_config_user_action="install pkg-config, and check the PKG_CONFIG_PATH environment variable"
36
    AC_MSG_NOTICE([Some libraries need pkg-config, including systemd, nss, lzma, zstd, and custom mallocs.])
37
    AC_MSG_NOTICE([To use those libraries, $pkg_config_user_action.])
38
else
39
    pkg_config_user_action="check the PKG_CONFIG_PATH environment variable"
40
fi
41

42
43
44
45
46
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

47
AC_ARG_ENABLE(openbsd-malloc,
48
   AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD.  Linux only. Deprecated: see --with-malloc]))
49
AC_ARG_ENABLE(static-openssl,
50
   AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
51
AC_ARG_ENABLE(static-libevent,
52
   AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
53
AC_ARG_ENABLE(static-zlib,
54
   AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
55
AC_ARG_ENABLE(static-tor,
56
   AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
57
AC_ARG_ENABLE(unittests,
58
   AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
59
AC_ARG_ENABLE(coverage,
60
   AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
61
62
AC_ARG_ENABLE(asserts-in-tests,
   AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
63
AC_ARG_ENABLE(system-torrc,
64
   AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
Nick Mathewson's avatar
Nick Mathewson committed
65
AC_ARG_ENABLE(libfuzzer,
66
67
68
   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]))
69
70
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.]))
71
72
AC_ARG_ENABLE(rust,
   AS_HELP_STRING(--enable-rust, [enable rust integration]))
73
74
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.]))
75
76
AC_ARG_ENABLE(restart-debugging,
   AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
77
78
AC_ARG_ENABLE(zstd-advanced-apis,
   AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
79
80
AC_ARG_ENABLE(nss,
   AS_HELP_STRING(--enable-nss, [Use Mozilla's NSS TLS library. (EXPERIMENTAL)]))
81
82
AC_ARG_ENABLE(pic,
   AS_HELP_STRING(--enable-pic, [Build Tor's binaries as position-independent code, suitable to link as a library.]))
83

84
AC_ARG_ENABLE(missing-doc-warnings,
85
   AS_HELP_STRING(--enable-missing-doc-warnings, [Tell doxygen to warn about missing documentation. Makes doxygen warnings nonfatal.]))
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101

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)

102
if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
103
104
105
    AC_MSG_ERROR([Can't disable assertions outside of coverage build])
fi

106
107
108
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$enable_asserts_in_tests" = "xno")
Nick Mathewson's avatar
Nick Mathewson committed
109
AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
110
AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
111
AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
112
AM_CONDITIONAL(USE_NSS, test "x$enable_nss" = "xyes")
113
AM_CONDITIONAL(USE_OPENSSL, test "x$enable_nss" != "xyes")
114
115
116

if test "x$enable_nss" = "xyes"; then
  AC_DEFINE(ENABLE_NSS, 1,
117
  	    [Defined if we're building with NSS.])
118
119
120
else
  AC_DEFINE(ENABLE_OPENSSL, 1,
            [Defined if we're building with OpenSSL or LibreSSL])
121
fi
122

123
124
125
126
127
128
if test "$enable_static_tor" = "yes"; then
  enable_static_libevent="yes";
  enable_static_openssl="yes";
  enable_static_zlib="yes";
  CFLAGS="$CFLAGS -static"
fi
129

130
131
132
133
134
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

135
136
137
138
139
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

140
141
142
143
144
145
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.]))

146
AC_ARG_ENABLE(asciidoc,
147
     AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
148
     [case "${enableval}" in
149
150
        "yes") asciidoc=true ;;
        "no")  asciidoc=false ;;
151
152
153
        *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
      esac], [asciidoc=true])

154
155
# systemd notify support
AC_ARG_ENABLE(systemd,
156
      AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
157
      [case "${enableval}" in
158
159
        "yes") systemd=true ;;
        "no")  systemd=false ;;
160
161
162
        * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
      esac], [systemd=auto])

163
164
165
166
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
167

168
169
170
171
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
172
173

# systemd support
174
if test "x$enable_systemd" = "xno"; then
175
176
177
178
179
180
    have_systemd=no;
else
    PKG_CHECK_MODULES(SYSTEMD,
        [libsystemd-daemon],
        have_systemd=yes,
        have_systemd=no)
181
    if test "x$have_systemd" = "xno"; then
182
183
184
185
186
187
        AC_MSG_NOTICE([Okay, checking for systemd a different way...])
        PKG_CHECK_MODULES(SYSTEMD,
            [libsystemd],
            have_systemd=yes,
            have_systemd=no)
    fi
188
189
fi

190
if test "x$have_systemd" = "xyes"; then
191
    AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
192
    TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
193
    TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
194
    PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
195
         [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or greater])], [])
196
fi
197
AC_SUBST(TOR_SYSTEMD_CFLAGS)
198
199
AC_SUBST(TOR_SYSTEMD_LIBS)

200
if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
201
    AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found, $pkg_config_user_action, or set SYSTEMD_CFLAGS and SYSTEMD_LIBS.])
202
203
fi

204
case "$host" in
205
206
207
208
209
   *-*-solaris* )
     AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
     ;;
esac

210
AC_ARG_ENABLE(gcc-warnings,
211
212
213
     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.]))
214
AC_ARG_ENABLE(gcc-warnings-advisory,
215
     AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
216

217
218
dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
AC_ARG_ENABLE(gcc-hardening,
219
    AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
220

221
dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
222
AC_ARG_ENABLE(expensive-hardening,
223
224
225
226
227
    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"
228
  AC_DEFINE(DEBUG_SMARTLIST, 1, [Enable smartlist debugging])
229
fi
230

231
232
233
234
235
236
237
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

238
239
240
dnl Linker hardening options
dnl Currently these options are ELF specific - you can't use this with MacOSX
AC_ARG_ENABLE(linker-hardening,
241
    AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
242

243
AC_ARG_ENABLE(local-appdata,
244
   AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
245
246
247
248
249
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

250
AC_ARG_ENABLE(tool-name-check,
251
     AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
252

253
AC_ARG_ENABLE(seccomp,
254
     AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
255

256
AC_ARG_ENABLE(libscrypt,
257
     AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
258

259
dnl --- Tracing Options. ---
260

261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
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"
276
  have_tracing=1
277
278
fi

279
280
281
282
283
284
285
286
287
288
289
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])], [])
290
291
292
  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.
293
  AC_DEFINE([USE_TRACING_INSTRUMENTATION_USDT], [1], [Using USDT instrumentation])
294
  have_tracing=1
295
296
fi

297
298
299
300
301
302
303
304
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$enable_tracing_instrumentation_log_debug" = "xyes"])
305
306
307
if test "x$enable_tracing_instrumentation_log_debug" = "xyes"; then
  have_tracing=1
fi
308

309
dnl Define that tracing is supported if any instrumentation is used.
310
311
AM_COND_IF([USE_TRACING_INSTRUMENTATION_LOG_DEBUG],
           AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
312
313
AM_COND_IF([USE_TRACING_INSTRUMENTATION_USDT],
           AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
314
315
AM_COND_IF([USE_TRACING_INSTRUMENTATION_LTTNG],
           AC_DEFINE([HAVE_TRACING], [1], [Compiled with tracing support]))
316
AM_CONDITIONAL([USE_TRACING], [test "x$have_tracing" = x1 ])
317
318
319

dnl Finally, define the trace libs.
AC_SUBST([TOR_TRACE_LIBS])
320
321

dnl -- End Tracing Options. --
322

323
324
325
326
327
328
329
330
331
332
333
334
335
336
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])

  dnl Check if the Android log library is available.
  AC_CHECK_HEADERS([android/log.h])
  AC_SEARCH_LIBS(__android_log_write, [log])

fi

337
338
339
340
dnl ---
dnl Tor modules options. These options are namespaced with --disable-module-XXX
dnl ---

341
dnl All our modules.
Nick Mathewson's avatar
Nick Mathewson committed
342
m4_define(MODULES, relay dirauth dircache)
343
344
345
346

dnl Relay module.
AC_ARG_ENABLE([module-relay],
              AS_HELP_STRING([--disable-module-relay],
347
                             [Build tor without the Relay modules: tor can not run as a relay, bridge, or authority. Implies --disable-module-dirauth]))
348
349
350
351
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]))
352

Nick Mathewson's avatar
Nick Mathewson committed
353
dnl Dircache module.  (This cannot be enabled or disabled independently of
354
dnl the relay module.  It is not listed by --list-modules for this reason.)
Nick Mathewson's avatar
Nick Mathewson committed
355
356
357
358
359
360
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]))

361
362
363
dnl Directory Authority module.
AC_ARG_ENABLE([module-dirauth],
              AS_HELP_STRING([--disable-module-dirauth],
364
                             [Build tor without the Directory Authority module: tor can not run as a directory authority or bridge authority]))
365
AM_CONDITIONAL(BUILD_MODULE_DIRAUTH,[test "x$enable_module_dirauth" != "xno" && test "x$enable_module_relay" != "xno"])
366
367
368
AM_COND_IF(BUILD_MODULE_DIRAUTH,
           AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
                     [Compile with Directory Authority feature support]))
369

370
371
372
373
374
375
376
377
378
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)

379
380
381
382
383
384
385
386
387
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])
388

389
390
391
392
393
394
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.
395
396
if test "x$enable_tool_name_check" != "xno"; then
    if test "x$ac_tool_warned" = "xyes"; then
397
        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.)])
398
	elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
399
400
401
402
		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

403
AC_PROG_CC
404
AC_PROG_CPP
405
406
AC_PROG_MAKE_SET
AC_PROG_RANLIB
407
AC_PROG_SED
408

409
410
411
AC_ARG_VAR([PERL], [path to Perl binary])
AC_CHECK_PROGS([PERL], [perl])
AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
412

413
414
dnl check for asciidoc and a2x
AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
415
AC_PATH_PROGS([A2X], [a2x a2x.py], none)
416

417
AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
418
419
AM_CONDITIONAL(BUILD_MANPAGE, [test "x$enable_manpage" != "xno"])
AM_CONDITIONAL(BUILD_HTML_DOCS, [test "x$enable_html_manual" != "xno"])
420

421
AM_PROG_CC_C_O
422
AC_PROG_CC_C99
423

Nick Mathewson's avatar
Nick Mathewson committed
424
425
AC_CACHE_CHECK([for Python 3], [tor_cv_PYTHON],
   [AC_PATH_PROGS_FEATURE_CHECK([PYTHON], [ \
426
427
	python3 \
	python3.8 python3.7 python3.6 python3.5 python3.4 \
Nick Mathewson's avatar
Nick Mathewson committed
428
429
430
431
432
433
	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"

434
if test "x$PYTHON" = "x"; then
Nick Mathewson's avatar
Nick Mathewson committed
435
  AC_MSG_WARN([Python 3 unavailable; some tests will not be run.])
436
fi
Nick Mathewson's avatar
Nick Mathewson committed
437

438
439
AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])

440
dnl List all external rust crates we depend on here. Include the version
441
442
443
444
rust_crates=" \
    digest-0.7.2 \
    libc-0.2.39 \
"
445
AC_SUBST(rust_crates)
446

447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
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])])
462
 if test "$tor_cv_flexarray" = "yes"; then
463
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
464
 else
465
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
466
467
468
 fi
])

469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
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
491
492
493
494
495
496
497
498
499
500
501
502
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"

503
if test "$tor_cv_c_attr_fallthrough" = "yes"; then
Nick Mathewson's avatar
Nick Mathewson committed
504
505
506
  AC_DEFINE(HAVE_ATTR_FALLTHROUGH, [1], [defined if we have the fallthrough attribute.])
fi

507
508
TORUSER=_tor
AC_ARG_WITH(tor-user,
509
        AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
510
511
512
513
514
515
516
517
        [
           TORUSER=$withval
        ]
)
AC_SUBST(TORUSER)

TORGROUP=_tor
AC_ARG_WITH(tor-group,
518
        AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
519
520
521
522
523
524
        [
           TORGROUP=$withval
        ]
)
AC_SUBST(TORGROUP)

525

526
dnl If _WIN32 is defined and non-zero, we are building for win32
527
AC_MSG_CHECKING([for win32])
528
AC_RUN_IFELSE([AC_LANG_SOURCE([
529
int main(int c, char **v) {
530
531
#ifdef _WIN32
#if _WIN32
532
533
534
535
536
537
538
  return 0;
#else
  return 1;
#endif
#else
  return 2;
#endif
539
}])],
540
bwin32=true; AC_MSG_RESULT([yes]),
541
542
bwin32=false; AC_MSG_RESULT([no]),
bwin32=cross; AC_MSG_RESULT([cross])
543
544
)

545
if test "$bwin32" = "cross"; then
546
AC_MSG_CHECKING([for win32 (cross)])
547
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
548
#ifdef _WIN32
549
550
551
552
553
int main(int c, char **v) {return 0;}
#else
#error
int main(int c, char **v) {return x(y);}
#endif
554
])],
555
556
557
558
bwin32=true; AC_MSG_RESULT([yes]),
bwin32=false; AC_MSG_RESULT([no]))
fi

559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
AH_BOTTOM([
#ifdef _WIN32
/* Defined to access windows functions and definitions for >=WinXP */
# ifndef WINVER
#  define WINVER 0x0501
# endif

/* Defined to access _other_ windows functions and definitions for >=WinXP */
# ifndef _WIN32_WINNT
#  define _WIN32_WINNT 0x0501
# 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
])

578
AM_CONDITIONAL(WIN32, test "x$bwin32" = "xtrue")
579
AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
580
AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
581

582
583
dnl Enable C99 when compiling with MIPSpro
AC_MSG_CHECKING([for MIPSpro compiler])
584
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
585
586
587
588
#if (defined(__sgi) && defined(_COMPILER_VERSION))
#error
  return x(y);
#endif
589
])],
590
bmipspro=false; AC_MSG_RESULT(no),
591
bmipspro=true; AC_MSG_RESULT(yes))
592

593
if test "$bmipspro" = "true"; then
594
595
596
  CFLAGS="$CFLAGS -c99"
fi

597
598
AC_C_BIGENDIAN

Alex Xu's avatar
Alex Xu committed
599
600
AC_ARG_VAR([TOR_RUST_TARGET], [Rust target, must be specified when cross-compiling (HOST != BUILD). example: i686-pc-windows-gnu])

601
602
603
604
605
606
607
608
609
610
611
612
613
614
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])
615
616
617
618
619
  if test "x$enable_fatal_warnings" = "xyes"; then
    RUST_WARN=
  else
    RUST_WARN=#
  fi
620
621
622
623
624
625
626
627
628
629
  if test "x$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])
630
631
    AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
    if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
632
      TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
633
    fi
634
    dnl Check whether the path exists before we try to cd into it.
635
636
    if test ! -d "$TOR_RUST_DEPENDENCIES"; then
      AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
637
      ERRORED=1
638
    fi
639
640
641
642
    dnl Make the path absolute, since we'll be using it from within a
    dnl subdirectory.
    TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)

643
    for dep in $rust_crates; do
644
645
      if test ! -d "$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.])
646
        ERRORED=1
647
648
      fi
    done
649
650
651
    if test "x$ERRORED" = "x"; then
      AC_MSG_RESULT([yes])
    fi
652
653
654
655
656
  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
657
    tor_rust_static_name=tor_rust.lib
658
  else
Alex Xu's avatar
Alex Xu committed
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
    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"
676
677
  fi

Alex Xu's avatar
Alex Xu committed
678
679
  AC_SUBST(RUST_TARGET_PROP)
  AC_SUBST(TOR_RUST_LIB_PATH)
680
  AC_SUBST(CARGO_ONLINE)
681
  AC_SUBST(RUST_WARN)
682
683
684
685
  AC_SUBST(RUST_DL)

  dnl Let's check the rustc version, too
  AC_MSG_CHECKING([rust version])
686
  RUSTC_VERSION=`$RUSTC --version`
687
688
689
690
691
  RUSTC_VERSION_MAJOR=`$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$RUSTC_VERSION_MINOR" = "x"; then
    AC_MSG_ERROR([rustc version couldn't be identified])
  fi
692
693
  if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 31; then
    AC_MSG_ERROR([rustc must be at least version 1.31.0])
694
  fi
695
  AC_MSG_RESULT([$RUSTC_VERSION])
696
697
fi

698
AC_SEARCH_LIBS(socket, [socket network])
699
AC_SEARCH_LIBS(gethostbyname, [nsl])
700
AC_SEARCH_LIBS(dlopen, [dl])
701
AC_SEARCH_LIBS(inet_aton, [resolv])
702
AC_SEARCH_LIBS(backtrace, [execinfo])
703
704
705
706
707
708
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
709

710
711
712
713
if test "$bwin32" = "false"; then
  AC_SEARCH_LIBS(pthread_create, [pthread])
  AC_SEARCH_LIBS(pthread_detach, [pthread])
fi
714

715
716
AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
717

718
AC_CHECK_FUNCS(
Nick Mathewson's avatar
Nick Mathewson committed
719
	_NSGetEnviron \
720
721
	RtlSecureZeroMemory \
	SecureZeroMemory \
Nick Mathewson's avatar
Nick Mathewson committed
722
723
724
	accept4 \
	backtrace \
	backtrace_symbols_fd \
725
	eventfd \
726
	explicit_bzero \
727
	timingsafe_memcmp \
Nick Mathewson's avatar
Nick Mathewson committed
728
	flock \
729
	fsync \
Nick Mathewson's avatar
Nick Mathewson committed
730
731
732
	ftime \
	get_current_dir_name \
	getaddrinfo \
733
	getdelim \
Nick Mathewson's avatar
Nick Mathewson committed
734
	getifaddrs \
735
	getline \
Nick Mathewson's avatar
Nick Mathewson committed
736
737
738
	getrlimit \
	gettimeofday \
	gmtime_r \
739
	gnu_get_libc_version \
Nick Mathewson's avatar
Nick Mathewson committed
740
741
742
743
744
745
	inet_aton \
	ioctl \
	issetugid \
	llround \
	localtime_r \
	lround \
746
	madvise \
Nick Mathewson's avatar
Nick Mathewson committed
747
748
	memmem \
	memset_s \
749
	minherit \
Nick Mathewson's avatar
Nick Mathewson committed
750
	mmap \
751
752
	pipe \
	pipe2 \
Nick Mathewson's avatar
Nick Mathewson committed
753
	prctl \
754
	readpassphrase \
Nick Mathewson's avatar
Nick Mathewson committed
755
756
757
	rint \
	sigaction \
	socketpair \
758
	statvfs \
Nick Mathewson's avatar
Nick Mathewson committed
759
760
761
762
	strncasecmp \
	strcasecmp \
	strlcat \
	strlcpy \
763
	strnlen \
Nick Mathewson's avatar
Nick Mathewson committed
764
765
766
767
	strptime \
	strtok_r \
	strtoull \
	sysconf \
768
	sysctl \
Nick Mathewson's avatar
Nick Mathewson committed
769
	truncate \
Nick Mathewson's avatar
Nick Mathewson committed
770
	uname \
771
	usleep \
Nick Mathewson's avatar
Nick Mathewson committed
772
	vasprintf \
773
	_vscprintf
774
)
775

776
# Apple messed up when they added some functions: they
777
# forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
# 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
806
# are not targeting OSX 10.11 or earlier.
807
AC_MSG_CHECKING([for a pre-Sierra OSX build target])
808
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
809
810
#ifdef __APPLE__
#  include <AvailabilityMacros.h>
811
812
#  ifndef MAC_OS_X_VERSION_10_12
#    define MAC_OS_X_VERSION_10_12 101200
813
814
#  endif
#  if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
815
#    if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
816
817
818
819
#      error "Running on Mac OSX 10.11 or earlier"
#    endif
#  endif
#endif
820
]], [[]])],
821
822
823
824
825
826
827
828
829
830
   [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

831
if test "$bwin32" != "true"; then
832
833
  AC_CHECK_HEADERS(pthread.h)
  AC_CHECK_FUNCS(pthread_create)
834
  AC_CHECK_FUNCS(pthread_condattr_setclock)
835
836
fi

837
if test "$bwin32" = "true"; then
838
839
840
841
842
843
844
  AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
#include <windows.h>
#include <conio.h>
#include <wchar.h>
                 ])
fi

845
846
AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
847

848
849
AC_CHECK_FUNCS(glob)

850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
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

865
dnl ------------------------------------------------------
866
dnl Where do you live, libevent?  And how do we call you?
867

868
if test "$bwin32" = "true"; then
869
  TOR_LIB_WS32=-lws2_32
870
  TOR_LIB_IPHLPAPI=-liphlpapi
871
  TOR_LIB_SHLWAPI=-lshlwapi
872
873
  # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  # think it's actually necessary.
874
  TOR_LIB_GDI=-lgdi32
875
  TOR_LIB_USERENV=-luserenv
Nick Mathewson's avatar
   
Nick Mathewson committed
876
else
877
878
  TOR_LIB_WS32=
  TOR_LIB_GDI=
879
  TOR_LIB_USERENV=
Nick Mathewson's avatar
   
Nick Mathewson committed
880
fi
881
882
AC_SUBST(TOR_LIB_WS32)
AC_SUBST(TOR_LIB_GDI)
883
AC_SUBST(TOR_LIB_IPHLPAPI)
884
AC_SUBST(TOR_LIB_SHLWAPI)
885
AC_SUBST(TOR_LIB_USERENV)
Nick Mathewson's avatar
   
Nick Mathewson committed
886

887
tor_libevent_pkg_redhat="libevent"
888
tor_libevent_pkg_debian="libevent-dev"
889
890
891
tor_libevent_devpkg_redhat="libevent-devel"
tor_libevent_devpkg_debian="libevent-dev"

892
893
894
895
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 "$enable_static_libevent" = "yes"; then
896
    if test "$have_rt" = "yes"; then
897
898
899
900
901
      STATIC_LIBEVENT_FLAGS=" -lrt "
    fi
fi

TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
902
#ifdef _WIN32
903
904
#include <winsock2.h>
#endif
905
#include <sys/time.h>
Roger Dingledine's avatar
Roger Dingledine committed
906
#include <sys/types.h>
907
#include <event2/event.h>], [
908
#ifdef _WIN32
909
910
#include <winsock2.h>
#endif
911
struct event_base;
912
913
struct event_base *event_base_new(void);
void event_base_free(struct event_base *);],
914
    [
915
#ifdef _WIN32
916
{WSADATA d; WSAStartup(0x101,&d); }
917
#endif
Alex Xu's avatar
Alex Xu committed
918
event_base_free(event_base_new());
919
], [--with-libevent-dir], [/opt/libevent])
920

921
dnl Determine the incantation needed to link libevent.
922
923
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
924
save_CPPFLAGS="$CPPFLAGS"
925
926

LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
927
LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
928
CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
929

930
931
AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)

932
933
934
935
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
936
     TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
937
938
   fi
else
939
     if test "x$ac_cv_header_event2_event_h" = "xyes"; then
Nick Mathewson's avatar
Nick Mathewson committed
940
941
       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"))
942

943
       if test "$ac_cv_search_event_new" != "none required"; then
944
945
         TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
       fi
946
       if test "$ac_cv_search_evdns_base_new" != "none required"; then
947
948
949
         TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
       fi
     else
950
       AC_MSG_ERROR("libevent2 is required but the headers could not be found")
951
     fi
952
953
fi

954
955
956
dnl Now check for particular libevent functions.
AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
                evutil_secure_rng_add_bytes \
957
958
                evdns_base_get_nameserver_addr \

959
960
])

961
962
963
964
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

965
966
967
968
969
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([
970
#include <event2/event.h>
971
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
972
973
974
975
976
#error
int x = y(zz);
#else
int x = 1;
#endif
977
978
979
980
981
982
983
984
])], [ 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"

985
AC_SUBST(TOR_LIBEVENT_LIBS)
986

987
988
989
990
991
992
993
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="$LIBS"
994
995
996
AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
if test "$ac_cv_search_pow" != "none required"; then
    TOR_LIB_MATH="$ac_cv_search_pow"
997
998
999
1000
fi
LIBS="$save_LIBS"
AC_SUBST(TOR_LIB_MATH)

1001
1002
1003
1004
1005
1006
dnl ------------------------------------------------------
dnl Hello, NSS.  You're new around here.
if test "x$enable_nss" = "xyes"; then
  PKG_CHECK_MODULES(NSS,
     [nss],
     [have_nss=yes],
1007
     [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.])])
1008
1009
1010
1011
  AC_SUBST(NSS_CFLAGS)
  AC_SUBST(NSS_LIBS)
fi

1012
dnl ------------------------------------------------------
1013
dnl Where do you live, openssl?  And how do we call you?
1014

1015
1016
if test "x$enable_nss" != "xyes"; then

1017
tor_openssl_pkg_redhat="openssl"
1018
tor_openssl_pkg_debian="libssl-dev"
1019
1020
1021
tor_openssl_devpkg_redhat="openssl-devel"
tor_openssl_devpkg_debian="libssl-dev"

1022
1023
ALT_openssl_WITHVAL=""
AC_ARG_WITH(ssl-dir,
1024
  AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
1025
  [
1026
      if test "x$withval" != "xno" && test "x$withval" != "x"; then
1027
1028
1029
1030
         ALT_openssl_WITHVAL="$withval"
      fi
  ])

1031
AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
1032
TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
    [#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);], [],
1045
    [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
1046

1047
1048
1049
1050
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
1051
     TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
1052
1053
   fi
else
1054
     TOR_OPENSSL_LIBS="-lssl -lcrypto"
1055
1056
1057
fi
AC_SUBST(TOR_OPENSSL_LIBS)

1058
dnl Now validate openssl, and check for particular openssl functions.
1059
1060
1061
1062
1063
1064
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
save_CPPFLAGS="$CPPFLAGS"
LIBS="$TOR_OPENSSL_LIBS $LIBS"
LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
1065

1066
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1067
#include <openssl/opensslv.h>
1068
#if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
1069
1070
#error "too old"
#endif
1071
   ]], [[]])],
1072
   [ : ],
1073
   [ 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.]) ])
1074

1075
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
1076
1077
1078
1079
1080
1081
1082
1083
#include <openssl/opensslv.h>
#include <openssl/evp.h>
#if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
#error "no ECC"
#endif
#if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
#error "curves unavailable"
#endif
1084
   ]], [[]])],
1085
   [ : ],
1086
   [ 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.]) ])
1087

1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108