configure.ac 49.8 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
3
dnl Copyright (c) 2007-2013, The Tor Project, Inc.
Nick Mathewson's avatar
Nick Mathewson committed
4
dnl See LICENSE for licensing information
5

6
AC_INIT([tor],[0.2.5.4-alpha-dev])
Stewart Smith's avatar
Stewart Smith committed
7
AC_CONFIG_SRCDIR([src/or/main.c])
8
AC_CONFIG_MACRO_DIR([m4])
Stewart Smith's avatar
Stewart Smith committed
9
AM_INIT_AUTOMAKE
10
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
11
AC_CONFIG_HEADERS([orconfig.h])
12

13
14
AC_CANONICAL_HOST

15
if test -f /etc/redhat-release ; then
16
  if test -f /usr/kerberos/include ; then
17
    CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
18
  fi
19
fi
20

21
22
# Not a no-op; we want to make sure that CPPFLAGS is set before we use
# the += operator on it in src/or/Makefile.am
23
CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
24

25
26
27
#XXXX020 We should make these enabled or not, before 0.2.0.x-final
AC_ARG_ENABLE(buf-freelists,
   AS_HELP_STRING(--disable-buf-freelists, disable freelists for buffer RAM))
28
29
AC_ARG_ENABLE(openbsd-malloc,
   AS_HELP_STRING(--enable-openbsd-malloc, Use malloc code from openbsd.  Linux only))
30
31
AC_ARG_ENABLE(instrument-downloads,
   AS_HELP_STRING(--enable-instrument-downloads, Instrument downloads of directory resources etc.))
32
33
34
35
AC_ARG_ENABLE(static-openssl,
   AS_HELP_STRING(--enable-static-openssl, Link against a static openssl library. Requires --with-openssl-dir))
AC_ARG_ENABLE(static-libevent,
   AS_HELP_STRING(--enable-static-libevent, Link against a static libevent library. Requires --with-libevent-dir))
36
37
AC_ARG_ENABLE(static-zlib,
   AS_HELP_STRING(--enable-static-zlib, Link against a static zlib library. Requires --with-zlib-dir))
38
AC_ARG_ENABLE(static-tor,
39
   AS_HELP_STRING(--enable-static-tor, Create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir))
40
41
AC_ARG_ENABLE(curve25519,
   AS_HELP_STRING(--disable-curve25519, Build Tor with no curve25519 elliptic-curve crypto support))
42
43
AC_ARG_ENABLE(unittests,
   AS_HELP_STRING(--disable-unittests, [Don't build unit tests for Tor. Risky!]))
44
45
AC_ARG_ENABLE(coverage,
   AS_HELP_STRING(--enable-coverage, [Enable coverage support in the unit-test build]))
46

47
48
49
AM_CONDITIONAL(UNITTESTS_ENABLED, test x$enable_unittests != xno)
AM_CONDITIONAL(COVERAGE_ENABLED, test x$enable_coverage = xyes)

50
51
52
53
54
55
if test "$enable_static_tor" = "yes"; then
  enable_static_libevent="yes";
  enable_static_openssl="yes";
  enable_static_zlib="yes";
  CFLAGS="$CFLAGS -static"
fi
56

57
58
59
60
if test x$enable_buf_freelists != xno; then
  AC_DEFINE(ENABLE_BUF_FREELISTS, 1,
            [Defined if we try to use freelists for buffer RAM chunks])
fi
61
AM_CONDITIONAL(USE_OPENBSD_MALLOC, test x$enable_openbsd_malloc = xyes)
62
if test x$enable_instrument_downloads = xyes; then
63
64
65
  AC_DEFINE(INSTRUMENT_DOWNLOADS, 1,
            [Defined if we want to keep track of how much of each kind of resource we download.])
fi
66

67
AC_ARG_ENABLE(transparent,
68
     AS_HELP_STRING(--disable-transparent, disable transparent proxy support),
69
70
71
72
73
74
     [case "${enableval}" in
        yes) transparent=true ;;
        no)  transparent=false ;;
        *) AC_MSG_ERROR(bad value for --enable-transparent) ;;
      esac], [transparent=true])

75
76
77
78
79
80
81
82
AC_ARG_ENABLE(asciidoc,
     AS_HELP_STRING(--disable-asciidoc, don't use asciidoc (disables building of manpages)),
     [case "${enableval}" in
        yes) asciidoc=true ;;
        no)  asciidoc=false ;;
        *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
      esac], [asciidoc=true])

83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
# By default, we're not ready to ship a NAT-PMP aware Tor
AC_ARG_ENABLE(nat-pmp,
     AS_HELP_STRING(--enable-nat-pmp, enable NAT-PMP support),
     [case "${enableval}" in
        yes) natpmp=true ;;
        no)  natpmp=false ;;
        * ) AC_MSG_ERROR(bad value for --enable-nat-pmp) ;;
      esac], [natpmp=false])

# By default, we're not ready to ship a UPnP aware Tor
AC_ARG_ENABLE(upnp,
     AS_HELP_STRING(--enable-upnp, enable UPnP support),
     [case "${enableval}" in
        yes) upnp=true ;;
        no)  upnp=false ;;
        * ) AC_MSG_ERROR(bad value for --enable-upnp) ;;
      esac], [upnp=false])

101

Nick Mathewson's avatar
Nick Mathewson committed
102
AC_ARG_ENABLE(threads,
103
     AS_HELP_STRING(--disable-threads, disable multi-threading support))
Nick Mathewson's avatar
Nick Mathewson committed
104
105

if test x$enable_threads = x; then
106
   case $host in
107
108
109
110
111
    *-*-solaris* )
     # Don't try multithreading on solaris -- cpuworkers seem to lock.
     AC_MSG_NOTICE([You are running Solaris; Sometimes threading makes
cpu workers lock up here, so I will disable threads.])
     enable_threads="no";;
Nick Mathewson's avatar
Nick Mathewson committed
112
113
114
115
116
    *)
     enable_threads="yes";;
   esac
fi

117
if test "$enable_threads" = "yes"; then
Nick Mathewson's avatar
Nick Mathewson committed
118
119
120
  AC_DEFINE(ENABLE_THREADS, 1, [Defined if we will try to use multithreading])
fi

121
122
123
124
125
126
case $host in
   *-*-solaris* )
     AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
     ;;
esac

127
AC_ARG_ENABLE(gcc-warnings,
128
     AS_HELP_STRING(--enable-gcc-warnings, enable verbose warnings))
129
130
AC_ARG_ENABLE(gcc-warnings-advisory,
     AS_HELP_STRING(--enable-gcc-warnings-advisory, [enable verbose warnings, excluding -Werror]))
131

132
133
dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
AC_ARG_ENABLE(gcc-hardening,
134
    AS_HELP_STRING(--disable-gcc-hardening, disable compiler security checks))
135

136
137
138
AC_ARG_ENABLE(expensive-hardening,
    AS_HELP_STRING(--enable-expensive-hardening, enable more expensive compiler hardening; makes Tor slower))

139
140
141
dnl Linker hardening options
dnl Currently these options are ELF specific - you can't use this with MacOSX
AC_ARG_ENABLE(linker-hardening,
142
    AS_HELP_STRING(--disable-linker-hardening, disable linker security fixups))
143

144
145
146
147
148
149
150
AC_ARG_ENABLE(local-appdata,
   AS_HELP_STRING(--enable-local-appdata, default to host local application data paths on Windows))
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

151
152
153
154
155
156
157
# Tor2web mode flag
AC_ARG_ENABLE(tor2web-mode,
     AS_HELP_STRING(--enable-tor2web-mode, support tor2web non-anonymous mode),
[if test x$enableval = xyes; then
    CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
fi])

158
159
160
AC_ARG_ENABLE(bufferevents,
     AS_HELP_STRING(--enable-bufferevents, use Libevent's buffered IO.))

161
162
163
AC_ARG_ENABLE(tool-name-check,
     AS_HELP_STRING(--disable-tool-name-check, check for sanely named toolchain when cross-compiling))

164
165
166
167
168
169
dnl check for the correct "ar" when cross-compiling
AN_MAKEVAR([AR], [AC_PROG_AR])
AN_PROGRAM([ar], [AC_PROG_AR])
AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [ar])])
AC_PROG_AR

170
171
172
173
174
175
176
177
178
179
180
181
182
183
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.
if test x$enable_tool_name_check != xno; then
    if test x$ac_tool_warned = xyes; then
        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.)])
	elif test "x$ac_ct_AR" != x -a x$cross_compiling = xmaybe; then
		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

184
AC_PROG_CC
185
AC_PROG_CPP
186
187
AC_PROG_MAKE_SET
AC_PROG_RANLIB
188
189
190

dnl autoconf 2.59 appears not to support AC_PROG_SED
AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
191

192
193
dnl check for asciidoc and a2x
AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
194
AC_PATH_PROGS([A2X], [a2x a2x.py], none)
195
196

AM_CONDITIONAL(USE_ASCIIDOC, test x$asciidoc = xtrue)
197

198
199
200
201
AM_CONDITIONAL(USE_FW_HELPER, test x$natpmp = xtrue || test x$upnp = xtrue)
AM_CONDITIONAL(NAT_PMP, test x$natpmp = xtrue)
AM_CONDITIONAL(MINIUPNPC, test x$upnp = xtrue)
AM_PROG_CC_C_O
202

203
204
205
206
207
208
209
AC_ARG_VAR(PYTHON)
AC_CHECK_PROGS(PYTHON, [python python2 python3])
if test "x$PYTHON" = "x"; then
  AC_MSG_WARN([Python unavailable; some tests will not be run.])
fi
AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])

210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
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])])
 if test $tor_cv_flexarray = yes ; then
226
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
227
 else
228
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
229
230
231
 fi
])

232
233
AC_PATH_PROG([SHA1SUM], [sha1sum], none)
AC_PATH_PROG([OPENSSL], [openssl], none)
234

235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
TORUSER=_tor
AC_ARG_WITH(tor-user,
        [  --with-tor-user=NAME    Specify username for tor daemon ],
        [
           TORUSER=$withval
        ]
)
AC_SUBST(TORUSER)

TORGROUP=_tor
AC_ARG_WITH(tor-group,
        [  --with-tor-group=NAME   Specify group name for tor daemon ],
        [
           TORGROUP=$withval
        ]
)
AC_SUBST(TORGROUP)

253

254
dnl If _WIN32 is defined and non-zero, we are building for win32
255
AC_MSG_CHECKING([for win32])
256
AC_RUN_IFELSE([AC_LANG_SOURCE([
257
int main(int c, char **v) {
258
259
#ifdef _WIN32
#if _WIN32
260
261
262
263
264
265
266
  return 0;
#else
  return 1;
#endif
#else
  return 2;
#endif
267
}])],
268
bwin32=true; AC_MSG_RESULT([yes]),
269
270
bwin32=false; AC_MSG_RESULT([no]),
bwin32=cross; AC_MSG_RESULT([cross])
271
272
)

273
if test "$bwin32" = cross; then
274
AC_MSG_CHECKING([for win32 (cross)])
275
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
276
#ifdef _WIN32
277
278
279
280
281
int main(int c, char **v) {return 0;}
#else
#error
int main(int c, char **v) {return x(y);}
#endif
282
])],
283
284
285
286
bwin32=true; AC_MSG_RESULT([yes]),
bwin32=false; AC_MSG_RESULT([no]))
fi

287
AM_CONDITIONAL(BUILD_NT_SERVICES, test x$bwin32 = xtrue)
288

289
290
dnl Enable C99 when compiling with MIPSpro
AC_MSG_CHECKING([for MIPSpro compiler])
291
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
292
293
294
295
#if (defined(__sgi) && defined(_COMPILER_VERSION))
#error
  return x(y);
#endif
296
])],
297
bmipspro=false; AC_MSG_RESULT(no),
298
bmipspro=true; AC_MSG_RESULT(yes))
299

300
if test "$bmipspro" = true; then
301
302
303
  CFLAGS="$CFLAGS -c99"
fi

304
305
AC_C_BIGENDIAN

306
AC_SEARCH_LIBS(socket, [socket network])
307
AC_SEARCH_LIBS(gethostbyname, [nsl])
308
AC_SEARCH_LIBS(dlopen, [dl])
309
AC_SEARCH_LIBS(inet_aton, [resolv])
310
311
312
313
314
315
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
316

317
if test "$enable_threads" = "yes"; then
318
319
320
  AC_SEARCH_LIBS(pthread_create, [pthread])
  AC_SEARCH_LIBS(pthread_detach, [pthread])
fi
321

322
323
324
325
dnl -------------------------------------------------------------------
dnl Check for functions before libevent, since libevent-1.2 apparently
dnl exports strlcpy without defining it in a header.

326
AC_CHECK_FUNCS(
327
        _NSGetEnviron \
Sebastian Hahn's avatar
Sebastian Hahn committed
328
        accept4 \
Nick Mathewson's avatar
Nick Mathewson committed
329
330
        backtrace \
        backtrace_symbols_fd \
Sebastian Hahn's avatar
Sebastian Hahn committed
331
        clock_gettime \
332
333
334
        flock \
        ftime \
        getaddrinfo \
Sebastian Hahn's avatar
Sebastian Hahn committed
335
        getifaddrs \
336
337
338
339
        getrlimit \
        gettimeofday \
        gmtime_r \
        inet_aton \
Sebastian Hahn's avatar
Sebastian Hahn committed
340
        ioctl \
341
        issetugid \
342
        llround \
343
        localtime_r \
Sebastian Hahn's avatar
Sebastian Hahn committed
344
        lround \
345
346
        memmem \
        prctl \
Sebastian Hahn's avatar
Sebastian Hahn committed
347
        rint \
Nick Mathewson's avatar
Nick Mathewson committed
348
        sigaction \
349
350
351
352
353
354
355
        socketpair \
        strlcat \
        strlcpy \
        strptime \
        strtok_r \
        strtoull \
        sysconf \
356
	sysctl \
357
358
        uname \
        vasprintf \
359
	_vscprintf
360
)
361

362
if test "$enable_threads" = "yes"; then
363
364
365
366
  AC_CHECK_HEADERS(pthread.h)
  AC_CHECK_FUNCS(pthread_create)
fi

367
dnl ------------------------------------------------------
368
dnl Where do you live, libevent?  And how do we call you?
369

370
if test "$bwin32" = true; then
371
  TOR_LIB_WS32=-lws2_32
372
  TOR_LIB_IPHLPAPI=-liphlpapi
373
374
  # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  # think it's actually necessary.
375
  TOR_LIB_GDI=-lgdi32
Nick Mathewson's avatar
   
Nick Mathewson committed
376
else
377
378
  TOR_LIB_WS32=
  TOR_LIB_GDI=
Nick Mathewson's avatar
   
Nick Mathewson committed
379
fi
380
381
AC_SUBST(TOR_LIB_WS32)
AC_SUBST(TOR_LIB_GDI)
382
AC_SUBST(TOR_LIB_IPHLPAPI)
Nick Mathewson's avatar
   
Nick Mathewson committed
383

384
385
386
387
dnl We need to do this before we try our disgusting hack below.
AC_CHECK_HEADERS([sys/types.h])

dnl This is a disgusting hack so we safely include older libevent headers.
388
389
390
391
392
AC_CHECK_TYPE(u_int64_t, unsigned long long)
AC_CHECK_TYPE(u_int32_t, unsigned long)
AC_CHECK_TYPE(u_int16_t, unsigned short)
AC_CHECK_TYPE(u_int8_t, unsigned char)

393
tor_libevent_pkg_redhat="libevent"
394
tor_libevent_pkg_debian="libevent-dev"
395
396
397
tor_libevent_devpkg_redhat="libevent-devel"
tor_libevent_devpkg_debian="libevent-dev"

398
399
400
401
402
403
404
405
406
407
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 "$enable_static_libevent" = "yes"; then
    if test "$have_rt" = yes; then
      STATIC_LIBEVENT_FLAGS=" -lrt "
    fi
fi

TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
408
#ifdef _WIN32
409
410
#include <winsock2.h>
#endif
411
#include <stdlib.h>
412
#include <sys/time.h>
Roger Dingledine's avatar
Roger Dingledine committed
413
#include <sys/types.h>
414
#include <event.h>], [
415
#ifdef _WIN32
416
417
418
#include <winsock2.h>
#endif
void exit(int); void *event_init(void);],
419
    [
420
#ifdef _WIN32
421
{WSADATA d; WSAStartup(0x101,&d); }
422
423
424
#endif
event_init(); exit(0);
], [--with-libevent-dir], [/opt/libevent])
425

426
dnl Now check for particular libevent functions.
427
428
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
429
save_CPPFLAGS="$CPPFLAGS"
430
LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
431
LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
432
CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
433
434
435
436
437
AC_CHECK_FUNCS([event_get_version \
                event_get_version_number \
                event_get_method \
                event_set_log_callback \
                evdns_set_outgoing_bind_address \
438
                evutil_secure_rng_set_urandom_device_file \
439
                evutil_secure_rng_init \
440
                event_base_loopexit])
441
442
443
444
AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
[#include <event.h>
])

445
AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
446

447
448
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
449
CPPFLAGS="$save_CPPFLAGS"
450

451

452
453
AM_CONDITIONAL(USE_EXTERNAL_EVDNS, test x$ac_cv_header_event2_dns_h = xyes)

454
455
456
457
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
458
     TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
459
460
461
462
463
   fi
else
     TOR_LIBEVENT_LIBS="-levent"
fi

464
465
dnl This isn't the best test for Libevent 2.0.3-alpha.  Once it's released,
dnl we can do much better.
466
467
if test "$enable_bufferevents" = "yes" ; then
  if test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes" ; then
468
    AC_MSG_ERROR([You've asked for bufferevent support, but you're using a version of Libevent without SSL support.  This won't work.  We need Libevent 2.0.8-rc or later, and you don't seem to even have Libevent 2.0.3-alpha.])
469
470
471
472
473
474
  else

    CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"

    # Check for the right version.  First see if version detection works.
    AC_MSG_CHECKING([whether we can detect the Libevent version])
475
    AC_COMPILE_IFELSE([AC_LANG_SOURCE([
476
477
478
479
480
481
482
#include <event2/event.h>
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 10
#error
int x = y(zz);
#else
int x = 1;
#endif
483
  ])], [event_version_number_works=yes; AC_MSG_RESULT([yes]) ],
484
485
486
487
488
     [event_version_number_works=no;  AC_MSG_RESULT([no])])
    if test "$event_version_number_works" != 'yes'; then
      AC_MSG_WARN([Version detection on Libevent seems broken.  Your Libevent installation is probably screwed up or very old.])
    else
      AC_MSG_CHECKING([whether Libevent is new enough for bufferevents])
489
      AC_COMPILE_IFELSE([AC_LANG_SOURCE([
490
#include <event2/event.h>
491
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000d00
492
493
494
495
496
#error
int x = y(zz);
#else
int x = 1;
#endif
497
   ])], [ AC_MSG_RESULT([yes]) ],
498
      [ AC_MSG_RESULT([no])
499
        AC_MSG_ERROR([Libevent does not seem new enough to support bufferevents.  We require 2.0.13-stable or later]) ] )
500
501
    fi
  fi
502
503
fi

504
505
506
507
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

508
509
AM_CONDITIONAL(USE_BUFFEREVENTS, test "$enable_bufferevents" = "yes")
if test "$enable_bufferevents" = "yes"; then
510
511
512
513
514
515
  AC_DEFINE(USE_BUFFEREVENTS, 1, [Defined if we're going to use Libevent's buffered IO API])
  if test "$enable_static_libevent" = "yes"; then
    TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent_openssl.a $TOR_LIBEVENT_LIBS"
  else
    TOR_LIBEVENT_LIBS="-levent_openssl $TOR_LIBEVENT_LIBS"
  fi
516
fi
517
AC_SUBST(TOR_LIBEVENT_LIBS)
518

519
520
521
522
523
524
525
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="$LIBS"
526
527
528
AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
if test "$ac_cv_search_pow" != "none required"; then
    TOR_LIB_MATH="$ac_cv_search_pow"
529
530
531
532
fi
LIBS="$save_LIBS"
AC_SUBST(TOR_LIB_MATH)

533
dnl ------------------------------------------------------
534
dnl Where do you live, openssl?  And how do we call you?
535

536
tor_openssl_pkg_redhat="openssl"
537
tor_openssl_pkg_debian="libssl-dev"
538
539
540
tor_openssl_devpkg_redhat="openssl-devel"
tor_openssl_devpkg_debian="libssl-dev"

541
542
543
544
545
546
547
548
549
ALT_openssl_WITHVAL=""
AC_ARG_WITH(ssl-dir,
  [  --with-ssl-dir=PATH    Obsolete alias for --with-openssl-dir ],
  [
      if test "x$withval" != xno && test "x$withval" != "x" ; then
         ALT_openssl_WITHVAL="$withval"
      fi
  ])

550
TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
551
552
    [#include <openssl/rand.h>],
    [void RAND_add(const void *buf, int num, double entropy);],
553
    [RAND_add((void*)0,0,0); exit(0);], [],
554
    [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
555

556
557
dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()

558
559
560
561
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
562
     TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
563
564
   fi
else
565
     TOR_OPENSSL_LIBS="-lssl -lcrypto"
566
567
568
fi
AC_SUBST(TOR_OPENSSL_LIBS)

569
570
571
dnl ------------------------------------------------------
dnl Where do you live, zlib?  And how do we call you?

572
573
574
575
tor_zlib_pkg_redhat="zlib"
tor_zlib_pkg_debian="zlib1g"
tor_zlib_devpkg_redhat="zlib-devel"
tor_zlib_devpkg_debian="zlib1g-dev"
576
577
578
579
580
581
582

TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
    [#include <zlib.h>],
    [const char * zlibVersion(void);],
    [zlibVersion(); exit(0);], [--with-zlib-dir],
    [/opt/zlib])

583
584
585
586
587
588
589
590
591
592
593
594
if test "$enable_static_zlib" = "yes"; then
   if test "$tor_cv_library_zlib_dir" = "(system)"; then
     AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
 using --enable-static-zlib")
   else
     TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
   fi
else
     TOR_ZLIB_LIBS="-lz"
fi
AC_SUBST(TOR_ZLIB_LIBS)

595
596
597
598
599
dnl ---------------------------------------------------------------------
dnl Now that we know about our major libraries, we can check for compiler
dnl and linker hardening options.  We need to do this with the libraries known,
dnl since sometimes the linker will like an option but not be willing to
dnl use it with a build of a library.
600

601
602
603
all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI"

604
605
606
607
608
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
#if !defined(__clang__)
#error
#endif])], have_clang=yes, have_clang=no)

609
610
if test x$enable_gcc_hardening != xno; then
    CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
611
612
613
    if test x$have_clang = xyes; then
        TOR_CHECK_CFLAGS(-Qunused-arguments)
    fi
614
615
616
617
618
619
620
621
622
623
    TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
    AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
    AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
    AS_VAR_IF(can_compile, [yes],
        AS_VAR_IF(can_link, [yes],
                  [],
                  AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
        )
    AS_VAR_POPDEF([can_link])
    AS_VAR_POPDEF([can_compile])
624
625
626
    TOR_CHECK_CFLAGS(-Wstack-protector)
    TOR_CHECK_CFLAGS(-fwrapv)
    TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
627
628
629
630
    if test "$bwin32" = "false"; then
       TOR_CHECK_CFLAGS(-fPIE)
       TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
    fi
631
fi
632

633
634
635
636
637
638
if test x$enable_expensive_hardening = xyes ; then
   TOR_CHECK_CFLAGS([-fsanitize=address])
   TOR_CHECK_CFLAGS([-fsanitize=undefined])
   TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
fi

639
640
641
if test x$enable_linker_hardening != xno; then
    TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
fi
642

643
644
645
# For backtrace support
TOR_CHECK_LDFLAGS(-rdynamic)

646
dnl ------------------------------------------------------
647
648
649
650
dnl Now see if we have a -fomit-frame-pointer compiler option.

saved_CFLAGS="$CFLAGS"
TOR_CHECK_CFLAGS(-fomit-frame-pointer)
651
F_OMIT_FRAME_POINTER=''
652
if test "$saved_CFLAGS" != "$CFLAGS"; then
653
654
655
  if test x$enable_expensive_hardening != xyes ; then
    F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  fi
656
657
658
659
fi
CFLAGS="$saved_CFLAGS"
AC_SUBST(F_OMIT_FRAME_POINTER)

660
661
662
663
664
665
666
dnl ------------------------------------------------------
dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
dnl for us, as GCC 4.6 and later do at many optimization levels), then
dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
dnl code will work.
TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)

667
668
669
670
671
672
dnl ------------------------------------------------------
dnl Where do you live, libnatpmp?  And how do we call you?
dnl There are no packages for Debian or Redhat as of this patch

if test "$natpmp" = "true"; then
    AC_DEFINE(NAT_PMP, 1, [Define to 1 if we are building with nat-pmp.])
Steven Murdoch's avatar
Steven Murdoch committed
673
    TOR_SEARCH_LIBRARY(libnatpmp, $trylibnatpmpdir, [-lnatpmp $TOR_LIB_WS32 $TOR_LIB_IPHLPAPI],
674
        [#include <natpmp.h>],
675
        [#ifdef _WIN32
Steven Murdoch's avatar
Steven Murdoch committed
676
677
678
         #define STATICLIB
         #endif
         #include <natpmp.h>],
679
680
681
        [   int r;
            natpmp_t natpmp;
            natpmpresp_t response;
682
            r = initnatpmp(&natpmp, 0, 0);],
683
684
685
686
687
688
689
690
691
692
693
694
            [printf("initnatpmp() returned %d (%s)\n", r, r?"FAILED":"SUCCESS");
            exit(0);],
        [--with-libnatpmp-dir],
        [/usr/lib/])
fi


dnl ------------------------------------------------------
dnl Where do you live, libminiupnpc?  And how do we call you?
dnl There are no packages for Debian or Redhat as of this patch

if test "$upnp" = "true"; then
695
    AC_DEFINE(MINIUPNPC, 1, [Define to 1 if we are building with UPnP.])
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723

    dnl Before we call TOR_SEARCH_LIBRARY we'll do a quick compile test
    dnl to see if we have miniupnpc-1.5 or -1.6
    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <miniupnpc/miniupnpc.h>],
        [upnpDiscover(1, 0, 0, 0);exit(0);])],[miniupnpc15="true"],[miniupnpc15="false"])

    if test "$miniupnpc15" = "true" ; then
        AC_DEFINE([MINIUPNPC15],[1],[libminiupnpc version 1.5 found])
        TOR_SEARCH_LIBRARY(libminiupnpc, $trylibminiupnpcdir, [-lminiupnpc $TOR_LIB_WS32 $TOR_LIB_IPHLPAPI],
            [#include <miniupnpc/miniwget.h>
             #include <miniupnpc/miniupnpc.h>
             #include <miniupnpc/upnpcommands.h>],
            [void upnpDiscover(int delay, const char * multicastif,
             const char * minissdpdsock, int sameport);],
            [upnpDiscover(1, 0, 0, 0); exit(0);],
            [--with-libminiupnpc-dir],
            [/usr/lib/])
    else
        TOR_SEARCH_LIBRARY(libminiupnpc, $trylibminiupnpcdir, [-lminiupnpc $TOR_LIB_WS32 $TOR_LIB_IPHLPAPI],
            [#include <miniupnpc/miniwget.h>
             #include <miniupnpc/miniupnpc.h>
             #include <miniupnpc/upnpcommands.h>],
            [void upnpDiscover(int delay, const char * multicastif,
             const char * minissdpdsock, int sameport, int ipv6, int * error);],
            [upnpDiscover(1, 0, 0, 0, 0, 0); exit(0);],
            [--with-libminiupnpc-dir],
            [/usr/lib/])
    fi
724
725
fi

726
727
728
729
730
731
dnl ============================================================
dnl Check for libseccomp

AC_CHECK_HEADERS([seccomp.h])
AC_SEARCH_LIBS(seccomp_init, [seccomp])

732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
dnl ============================================================
dnl We need an implementation of curve25519.

dnl set these defaults.
have_a_curve25519=no
build_curve25519_donna=no
build_curve25519_donna_c64=no
use_curve25519_donna=no
use_curve25519_nacl=no
CURVE25519_LIBS=

if test x$enable_curve25519 != xno; then

  dnl The best choice is using curve25519-donna-c64, but that requires
  dnl that we
  AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
    tor_cv_can_use_curve25519_donna_c64,
    [AC_RUN_IFELSE(
      [AC_LANG_PROGRAM([dnl
        #include <stdint.h>
        typedef unsigned uint128_t __attribute__((mode(TI)));
753
754
755
	int func(uint64_t a, uint64_t b) {
  	     uint128_t c = ((uint128_t)a) * b;
             int ok = ((uint64_t)(c>>96)) == 522859 &&
756
757
758
	           (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
                   (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
                   (((uint64_t)(c))&0xffffffffL) == 0;
759
760
             return ok;
        }
761
	], [dnl
762
763
	  int ok = func( ((uint64_t)2000000000) * 1000000000,
	  	         ((uint64_t)1234567890) << 24);
764
          return !ok;
765
766
767
768
769
        ])],
	[tor_cv_can_use_curve25519_donna_c64=yes],
        [tor_cv_can_use_curve25519_donna_c64=no],
	[AC_COMPILE_IFELSE(
          [AC_LANG_PROGRAM([dnl
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
        #include <stdint.h>
        typedef unsigned uint128_t __attribute__((mode(TI)));
	int func(uint64_t a, uint64_t b) {
  	     uint128_t c = ((uint128_t)a) * b;
             int ok = ((uint64_t)(c>>96)) == 522859 &&
	           (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
                   (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
                   (((uint64_t)(c))&0xffffffffL) == 0;
             return ok;
        }
	], [dnl
	  int ok = func( ((uint64_t)2000000000) * 1000000000,
	  	         ((uint64_t)1234567890) << 24);
          return !ok;
        ])],
785
786
787
            [tor_cv_can_use_curve25519_donna_c64=cross],
	    [tor_cv_can_use_curve25519_donna_c64=no])])])

788
789
790
  AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
                    nacl/crypto_scalarmult_curve25519.h])

791
  AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
792
793
794
795
796
    tor_cv_can_use_curve25519_nacl,
    [tor_saved_LIBS="$LIBS"
     LIBS="$LIBS -lnacl"
     AC_LINK_IFELSE(
       [AC_LANG_PROGRAM([dnl
797
         #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
798
         #include <crypto_scalarmult_curve25519.h>
799
800
801
	 #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
	 #include <nacl/crypto_scalarmult_curve25519.h>
	 #endif
802
         #ifdef crypto_scalarmult_curve25519_ref_BYTES
803
	 #error Hey, this is the reference implementation! That's not fast.
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
	 #endif
       ], [
	 unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
       ])], [tor_cv_can_use_curve25519_nacl=yes],
       [tor_cv_can_use_curve25519_nacl=no])
     LIBS="$tor_saved_LIBS" ])

   dnl Okay, now we need to figure out which one to actually use. Fall back
   dnl to curve25519-donna.c

   if test x$tor_cv_can_use_curve25519_donna_c64 != xno; then
     build_curve25519_donna_c64=yes
     use_curve25519_donna=yes
   elif test x$tor_cv_can_use_curve25519_nacl = xyes; then
     use_curve25519_nacl=yes
     CURVE25519_LIBS=-lnacl
   else
     build_curve25519_donna=yes
     use_curve25519_donna=yes
   fi
   have_a_curve25519=yes
fi

if test x$have_a_curve25519 = xyes; then
  AC_DEFINE(CURVE25519_ENABLED, 1,
            [Defined if we have a curve25519 implementation])
fi
if test x$use_curve25519_donna = xyes; then
  AC_DEFINE(USE_CURVE25519_DONNA, 1,
            [Defined if we should use an internal curve25519_donna{,_c64} implementation])
fi
if test x$use_curve25519_nacl = xyes; then
  AC_DEFINE(USE_CURVE25519_NACL, 1,
            [Defined if we should use a curve25519 from nacl])
fi
AM_CONDITIONAL(BUILD_CURVE25519_DONNA, test x$build_curve25519_donna = xyes)
AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64, test x$build_curve25519_donna_c64 = xyes)
AM_CONDITIONAL(CURVE25519_ENABLED, test x$have_a_curve25519 = xyes)
AC_SUBST(CURVE25519_LIBS)

844
dnl Make sure to enable support for large off_t if available.
845
846
AC_SYS_LARGEFILE

847
848
849
850
851
852
853
854
855
856
857
858
859
AC_CHECK_HEADERS(
        assert.h \
        errno.h \
        fcntl.h \
        signal.h \
        string.h \
        sys/fcntl.h \
        sys/stat.h \
        sys/time.h \
        sys/types.h \
        time.h \
        unistd.h
 , , AC_MSG_WARN(Some headers were not found, compilation may fail.  If compilation succeeds, please send your orconfig.h to the developers so we can fix this warning.))
860

861
862
dnl These headers are not essential

863
864
AC_CHECK_HEADERS(
        arpa/inet.h \
865
        crt_externs.h \
Nick Mathewson's avatar
Nick Mathewson committed
866
        execinfo.h \
867
        grp.h \
Sebastian Hahn's avatar
Sebastian Hahn committed
868
        ifaddrs.h \
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
        inttypes.h \
        limits.h \
        linux/types.h \
        machine/limits.h \
        malloc.h \
        malloc/malloc.h \
        malloc_np.h \
        netdb.h \
        netinet/in.h \
        netinet/in6.h \
        pwd.h \
        stdint.h \
        sys/file.h \
        sys/ioctl.h \
        sys/limits.h \
        sys/mman.h \
        sys/param.h \
        sys/prctl.h \
        sys/resource.h \
        sys/socket.h \
889
	sys/sysctl.h \
890
891
892
893
894
895
896
897
898
        sys/syslimits.h \
        sys/time.h \
        sys/types.h \
        sys/un.h \
        sys/utime.h \
        sys/wait.h \
        syslog.h \
        utime.h
)
899

900
901
AC_CHECK_HEADERS(sys/param.h)

902
AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
903
904
905
906
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
907
908
#include <sys/socket.h>
#endif])
909
AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
910
911
912
913
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
914
#include <sys/socket.h>
915
916
917
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
918
#endif])
919
AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
920
        linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
921
922
923
924
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
925
#include <sys/socket.h>
926
#endif
927
928
929
930
931
932
933
934
935
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifdef HAVE_LINUX_TYPES_H
#include <linux/types.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
936
937
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
938
#endif])
939
940
941

if test x$transparent = xtrue ; then
   transparent_ok=0
942
   if test x$net_if_found = x1 && test x$net_pfvar_found = x1 ; then
943
944
945
946
947
     transparent_ok=1
   fi
   if test x$linux_netfilter_ipv4 = x1 ; then
     transparent_ok=1
   fi
948
   if test x$transparent_ok = x1 ; then
949
950
     AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
     case $host in
951
       *-*-openbsd* | *-*-bitrig*)
952
953
954
955
956
957
958
         AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
     esac
   else
     AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
   fi
fi

959
960
961
962
963
964
965
AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif])
966

967
968
969
dnl In case we aren't given a working stdint.h, we'll need to grow our own.
dnl Watch out.

970
971
972
973
974
975
976
977
AC_CHECK_SIZEOF(int8_t)
AC_CHECK_SIZEOF(int16_t)
AC_CHECK_SIZEOF(int32_t)
AC_CHECK_SIZEOF(int64_t)
AC_CHECK_SIZEOF(uint8_t)
AC_CHECK_SIZEOF(uint16_t)
AC_CHECK_SIZEOF(uint32_t)
AC_CHECK_SIZEOF(uint64_t)
978
979
AC_CHECK_SIZEOF(intptr_t)
AC_CHECK_SIZEOF(uintptr_t)
980

981
dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
982

983
984
985
986
987
988
AC_CHECK_SIZEOF(char)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)
AC_CHECK_SIZEOF(__int64)
989
AC_CHECK_SIZEOF(void *)
990
AC_CHECK_SIZEOF(time_t)
991
AC_CHECK_SIZEOF(size_t)
992
AC_CHECK_SIZEOF(pid_t)
993

994
AC_CHECK_TYPES([uint, u_char, ssize_t])
995

996
997
AC_PC_FROM_UCONTEXT([/bin/true])

998
999
dnl used to include sockaddr_storage, but everybody has that.
AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
1000
[#ifdef HAVE_SYS_TYPES_H