configure.ac 50.3 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],[0.2.5.12])
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
#XXXX020 We should make these enabled or not, before 0.2.0.x-final
AC_ARG_ENABLE(buf-freelists,
27
   AS_HELP_STRING(--enable-buf-freelists, enable freelists for buffer RAM))
28
AC_ARG_ENABLE(mempools,
29
   AS_HELP_STRING(--enable-mempools, enable mempools for relay cells))
30
31
AC_ARG_ENABLE(openbsd-malloc,
   AS_HELP_STRING(--enable-openbsd-malloc, Use malloc code from openbsd.  Linux only))
32
33
AC_ARG_ENABLE(instrument-downloads,
   AS_HELP_STRING(--enable-instrument-downloads, Instrument downloads of directory resources etc.))
34
35
36
37
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))
38
39
AC_ARG_ENABLE(static-zlib,
   AS_HELP_STRING(--enable-static-zlib, Link against a static zlib library. Requires --with-zlib-dir))
40
AC_ARG_ENABLE(static-tor,
41
   AS_HELP_STRING(--enable-static-tor, Create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir))
42
43
AC_ARG_ENABLE(curve25519,
   AS_HELP_STRING(--disable-curve25519, Build Tor with no curve25519 elliptic-curve crypto support))
44
45
AC_ARG_ENABLE(unittests,
   AS_HELP_STRING(--disable-unittests, [Don't build unit tests for Tor. Risky!]))
46
47
AC_ARG_ENABLE(coverage,
   AS_HELP_STRING(--enable-coverage, [Enable coverage support in the unit-test build]))
48

49
50
51
AM_CONDITIONAL(UNITTESTS_ENABLED, test x$enable_unittests != xno)
AM_CONDITIONAL(COVERAGE_ENABLED, test x$enable_coverage = xyes)

52
53
54
55
56
57
if test "$enable_static_tor" = "yes"; then
  enable_static_libevent="yes";
  enable_static_openssl="yes";
  enable_static_zlib="yes";
  CFLAGS="$CFLAGS -static"
fi
58

59
if test x$enable_buf_freelists = xyes; then
60
61
62
  AC_DEFINE(ENABLE_BUF_FREELISTS, 1,
            [Defined if we try to use freelists for buffer RAM chunks])
fi
63

64
65
AM_CONDITIONAL(USE_MEMPOOLS, test x$enable_mempools = xyes)
if test x$enable_mempools = xyes; then
66
67
68
69
  AC_DEFINE(ENABLE_MEMPOOLS, 1,
            [Defined if we try to use mempools for cells being relayed])
fi

70
AM_CONDITIONAL(USE_OPENBSD_MALLOC, test x$enable_openbsd_malloc = xyes)
71
if test x$enable_instrument_downloads = xyes; then
72
73
74
  AC_DEFINE(INSTRUMENT_DOWNLOADS, 1,
            [Defined if we want to keep track of how much of each kind of resource we download.])
fi
75

76
AC_ARG_ENABLE(transparent,
77
     AS_HELP_STRING(--disable-transparent, disable transparent proxy support),
78
79
80
81
82
83
     [case "${enableval}" in
        yes) transparent=true ;;
        no)  transparent=false ;;
        *) AC_MSG_ERROR(bad value for --enable-transparent) ;;
      esac], [transparent=true])

84
85
86
87
88
89
90
91
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])

92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
# 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])

110

Nick Mathewson's avatar
Nick Mathewson committed
111
AC_ARG_ENABLE(threads,
112
     AS_HELP_STRING(--disable-threads, disable multi-threading support))
Nick Mathewson's avatar
Nick Mathewson committed
113
114

if test x$enable_threads = x; then
115
   case $host in
116
117
118
119
120
    *-*-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
121
122
123
124
125
    *)
     enable_threads="yes";;
   esac
fi

126
if test "$enable_threads" = "yes"; then
Nick Mathewson's avatar
Nick Mathewson committed
127
128
129
  AC_DEFINE(ENABLE_THREADS, 1, [Defined if we will try to use multithreading])
fi

130
131
132
133
134
135
case $host in
   *-*-solaris* )
     AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
     ;;
esac

136
AC_ARG_ENABLE(gcc-warnings,
137
     AS_HELP_STRING(--enable-gcc-warnings, enable verbose warnings))
138
139
AC_ARG_ENABLE(gcc-warnings-advisory,
     AS_HELP_STRING(--enable-gcc-warnings-advisory, [enable verbose warnings, excluding -Werror]))
140

141
142
dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
AC_ARG_ENABLE(gcc-hardening,
143
    AS_HELP_STRING(--disable-gcc-hardening, disable compiler security checks))
144

145
146
147
AC_ARG_ENABLE(expensive-hardening,
    AS_HELP_STRING(--enable-expensive-hardening, enable more expensive compiler hardening; makes Tor slower))

148
149
150
dnl Linker hardening options
dnl Currently these options are ELF specific - you can't use this with MacOSX
AC_ARG_ENABLE(linker-hardening,
151
    AS_HELP_STRING(--disable-linker-hardening, disable linker security fixups))
152

153
154
155
156
157
158
159
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

160
161
162
163
164
165
166
# 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])

167
168
169
AC_ARG_ENABLE(bufferevents,
     AS_HELP_STRING(--enable-bufferevents, use Libevent's buffered IO.))

170
171
172
AC_ARG_ENABLE(tool-name-check,
     AS_HELP_STRING(--disable-tool-name-check, check for sanely named toolchain when cross-compiling))

173
174
175
AC_ARG_ENABLE(seccomp,
     AS_HELP_STRING(--disable-seccomp, do not attempt to use libseccomp))

176
177
178
179
180
181
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

182
183
184
185
186
187
188
189
190
191
192
193
194
195
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

196
AC_PROG_CC
197
AC_PROG_CPP
198
199
AC_PROG_MAKE_SET
AC_PROG_RANLIB
200
201
202

dnl autoconf 2.59 appears not to support AC_PROG_SED
AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
203

204
205
dnl check for asciidoc and a2x
AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
206
AC_PATH_PROGS([A2X], [a2x a2x.py], none)
207
208

AM_CONDITIONAL(USE_ASCIIDOC, test x$asciidoc = xtrue)
209

210
211
212
213
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
214

215
AC_ARG_VAR(PYTHON)
216
AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
217
218
219
220
221
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"])

222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
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
238
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
239
 else
240
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
241
242
243
 fi
])

244
245
AC_PATH_PROG([SHA1SUM], [sha1sum], none)
AC_PATH_PROG([OPENSSL], [openssl], none)
246

247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
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)

265

266
dnl If _WIN32 is defined and non-zero, we are building for win32
267
AC_MSG_CHECKING([for win32])
268
AC_RUN_IFELSE([AC_LANG_SOURCE([
269
int main(int c, char **v) {
270
271
#ifdef _WIN32
#if _WIN32
272
273
274
275
276
277
278
  return 0;
#else
  return 1;
#endif
#else
  return 2;
#endif
279
}])],
280
bwin32=true; AC_MSG_RESULT([yes]),
281
282
bwin32=false; AC_MSG_RESULT([no]),
bwin32=cross; AC_MSG_RESULT([cross])
283
284
)

285
if test "$bwin32" = cross; then
286
AC_MSG_CHECKING([for win32 (cross)])
287
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
288
#ifdef _WIN32
289
290
291
292
293
int main(int c, char **v) {return 0;}
#else
#error
int main(int c, char **v) {return x(y);}
#endif
294
])],
295
296
297
298
bwin32=true; AC_MSG_RESULT([yes]),
bwin32=false; AC_MSG_RESULT([no]))
fi

299
AM_CONDITIONAL(BUILD_NT_SERVICES, test x$bwin32 = xtrue)
300

301
302
dnl Enable C99 when compiling with MIPSpro
AC_MSG_CHECKING([for MIPSpro compiler])
303
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
304
305
306
307
#if (defined(__sgi) && defined(_COMPILER_VERSION))
#error
  return x(y);
#endif
308
])],
309
bmipspro=false; AC_MSG_RESULT(no),
310
bmipspro=true; AC_MSG_RESULT(yes))
311

312
if test "$bmipspro" = true; then
313
314
315
  CFLAGS="$CFLAGS -c99"
fi

316
317
AC_C_BIGENDIAN

318
AC_SEARCH_LIBS(socket, [socket network])
319
AC_SEARCH_LIBS(gethostbyname, [nsl])
320
AC_SEARCH_LIBS(dlopen, [dl])
321
AC_SEARCH_LIBS(inet_aton, [resolv])
322
323
324
325
326
327
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
328

329
if test "$enable_threads" = "yes"; then
330
331
332
  AC_SEARCH_LIBS(pthread_create, [pthread])
  AC_SEARCH_LIBS(pthread_detach, [pthread])
fi
333

334
335
336
337
dnl -------------------------------------------------------------------
dnl Check for functions before libevent, since libevent-1.2 apparently
dnl exports strlcpy without defining it in a header.

338
AC_CHECK_FUNCS(
339
        _NSGetEnviron \
Sebastian Hahn's avatar
Sebastian Hahn committed
340
        accept4 \
Nick Mathewson's avatar
Nick Mathewson committed
341
342
        backtrace \
        backtrace_symbols_fd \
Sebastian Hahn's avatar
Sebastian Hahn committed
343
        clock_gettime \
344
345
346
        flock \
        ftime \
        getaddrinfo \
Sebastian Hahn's avatar
Sebastian Hahn committed
347
        getifaddrs \
348
349
350
351
        getrlimit \
        gettimeofday \
        gmtime_r \
        inet_aton \
Sebastian Hahn's avatar
Sebastian Hahn committed
352
        ioctl \
353
        issetugid \
354
        llround \
355
        localtime_r \
Sebastian Hahn's avatar
Sebastian Hahn committed
356
        lround \
357
358
        memmem \
        prctl \
Sebastian Hahn's avatar
Sebastian Hahn committed
359
        rint \
Nick Mathewson's avatar
Nick Mathewson committed
360
        sigaction \
361
362
363
364
365
366
367
        socketpair \
        strlcat \
        strlcpy \
        strptime \
        strtok_r \
        strtoull \
        sysconf \
368
	sysctl \
369
        uname \
370
        usleep \
371
        vasprintf \
372
	_vscprintf
373
)
374

375
if test "$enable_threads" = "yes"; then
376
377
378
379
  AC_CHECK_HEADERS(pthread.h)
  AC_CHECK_FUNCS(pthread_create)
fi

380
dnl ------------------------------------------------------
381
dnl Where do you live, libevent?  And how do we call you?
382

383
if test "$bwin32" = true; then
384
  TOR_LIB_WS32=-lws2_32
385
  TOR_LIB_IPHLPAPI=-liphlpapi
386
387
  # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  # think it's actually necessary.
388
  TOR_LIB_GDI=-lgdi32
Nick Mathewson's avatar
   
Nick Mathewson committed
389
else
390
391
  TOR_LIB_WS32=
  TOR_LIB_GDI=
Nick Mathewson's avatar
   
Nick Mathewson committed
392
fi
393
394
AC_SUBST(TOR_LIB_WS32)
AC_SUBST(TOR_LIB_GDI)
395
AC_SUBST(TOR_LIB_IPHLPAPI)
Nick Mathewson's avatar
   
Nick Mathewson committed
396

397
398
399
400
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.
401
402
403
404
405
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)

406
tor_libevent_pkg_redhat="libevent"
407
tor_libevent_pkg_debian="libevent-dev"
408
409
410
tor_libevent_devpkg_redhat="libevent-devel"
tor_libevent_devpkg_debian="libevent-dev"

411
412
413
414
415
416
417
418
419
420
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], [
421
#ifdef _WIN32
422
423
#include <winsock2.h>
#endif
424
#include <stdlib.h>
425
#include <sys/time.h>
Roger Dingledine's avatar
Roger Dingledine committed
426
#include <sys/types.h>
427
#include <event.h>], [
428
#ifdef _WIN32
429
430
431
#include <winsock2.h>
#endif
void exit(int); void *event_init(void);],
432
    [
433
#ifdef _WIN32
434
{WSADATA d; WSAStartup(0x101,&d); }
435
436
437
#endif
event_init(); exit(0);
], [--with-libevent-dir], [/opt/libevent])
438

439
dnl Now check for particular libevent functions.
440
441
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
442
save_CPPFLAGS="$CPPFLAGS"
443
LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
444
LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
445
CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
446
447
448
449
AC_CHECK_FUNCS([event_get_version \
                event_get_version_number \
                event_get_method \
                event_set_log_callback \
450
                evutil_secure_rng_set_urandom_device_file \
451
                evutil_secure_rng_init \
452
                event_base_loopexit])
453
454
455
456
AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
[#include <event.h>
])

457
AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
458

459
460
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
461
CPPFLAGS="$save_CPPFLAGS"
462

463

464
465
AM_CONDITIONAL(USE_EXTERNAL_EVDNS, test x$ac_cv_header_event2_dns_h = xyes)

466
467
468
469
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
470
     TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
471
472
473
474
475
   fi
else
     TOR_LIBEVENT_LIBS="-levent"
fi

476
477
dnl This isn't the best test for Libevent 2.0.3-alpha.  Once it's released,
dnl we can do much better.
478
479
if test "$enable_bufferevents" = "yes" ; then
  if test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes" ; then
480
    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.])
481
482
483
484
485
486
  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])
487
    AC_COMPILE_IFELSE([AC_LANG_SOURCE([
488
489
490
491
492
493
494
#include <event2/event.h>
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 10
#error
int x = y(zz);
#else
int x = 1;
#endif
495
  ])], [event_version_number_works=yes; AC_MSG_RESULT([yes]) ],
496
497
498
499
500
     [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])
501
      AC_COMPILE_IFELSE([AC_LANG_SOURCE([
502
#include <event2/event.h>
503
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000d00
504
505
506
507
508
#error
int x = y(zz);
#else
int x = 1;
#endif
509
   ])], [ AC_MSG_RESULT([yes]) ],
510
      [ AC_MSG_RESULT([no])
511
        AC_MSG_ERROR([Libevent does not seem new enough to support bufferevents.  We require 2.0.13-stable or later]) ] )
512
513
    fi
  fi
514
515
fi

516
517
518
519
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

520
521
AM_CONDITIONAL(USE_BUFFEREVENTS, test "$enable_bufferevents" = "yes")
if test "$enable_bufferevents" = "yes"; then
522
523
524
525
526
527
  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
528
fi
529
AC_SUBST(TOR_LIBEVENT_LIBS)
530

531
532
533
534
535
536
537
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="$LIBS"
538
539
540
AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
if test "$ac_cv_search_pow" != "none required"; then
    TOR_LIB_MATH="$ac_cv_search_pow"
541
542
543
544
fi
LIBS="$save_LIBS"
AC_SUBST(TOR_LIB_MATH)

545
dnl ------------------------------------------------------
546
dnl Where do you live, openssl?  And how do we call you?
547

548
tor_openssl_pkg_redhat="openssl"
549
tor_openssl_pkg_debian="libssl-dev"
550
551
552
tor_openssl_devpkg_redhat="openssl-devel"
tor_openssl_devpkg_debian="libssl-dev"

553
554
555
556
557
558
559
560
561
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
  ])

562
TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
563
564
    [#include <openssl/rand.h>],
    [void RAND_add(const void *buf, int num, double entropy);],
565
    [RAND_add((void*)0,0,0); exit(0);], [],
566
    [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
567

568
569
dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()

570
571
572
573
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
574
     TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
575
576
   fi
else
577
     TOR_OPENSSL_LIBS="-lssl -lcrypto"
578
579
580
fi
AC_SUBST(TOR_OPENSSL_LIBS)

581
582
583
584
AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
[#include <openssl/ssl.h>
])

585
586
587
dnl ------------------------------------------------------
dnl Where do you live, zlib?  And how do we call you?

588
589
590
591
tor_zlib_pkg_redhat="zlib"
tor_zlib_pkg_debian="zlib1g"
tor_zlib_devpkg_redhat="zlib-devel"
tor_zlib_devpkg_debian="zlib1g-dev"
592
593
594
595
596
597
598

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

599
600
601
602
603
604
605
606
607
608
609
610
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)

611
612
613
614
615
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.
616

617
618
619
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"

620
621
622
623
624
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
#if !defined(__clang__)
#error
#endif])], have_clang=yes, have_clang=no)

625
626
if test x$enable_gcc_hardening != xno; then
    CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
627
628
629
    if test x$have_clang = xyes; then
        TOR_CHECK_CFLAGS(-Qunused-arguments)
    fi
630
631
632
633
634
635
636
637
638
639
    TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
    AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
    AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
    AS_VAR_IF(can_compile, [yes],
        AS_VAR_IF(can_link, [yes],
                  [],
                  AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
        )
    AS_VAR_POPDEF([can_link])
    AS_VAR_POPDEF([can_compile])
640
641
642
    TOR_CHECK_CFLAGS(-Wstack-protector)
    TOR_CHECK_CFLAGS(-fwrapv)
    TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
643
644
645
646
    if test "$bwin32" = "false"; then
       TOR_CHECK_CFLAGS(-fPIE)
       TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
    fi
647
fi
648

649
650
651
652
653
654
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

655
656
657
if test x$enable_linker_hardening != xno; then
    TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
fi
658

659
660
661
# For backtrace support
TOR_CHECK_LDFLAGS(-rdynamic)

662
dnl ------------------------------------------------------
663
664
665
666
dnl Now see if we have a -fomit-frame-pointer compiler option.

saved_CFLAGS="$CFLAGS"
TOR_CHECK_CFLAGS(-fomit-frame-pointer)
667
F_OMIT_FRAME_POINTER=''
668
if test "$saved_CFLAGS" != "$CFLAGS"; then
669
670
671
  if test x$enable_expensive_hardening != xyes ; then
    F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  fi
672
673
674
675
fi
CFLAGS="$saved_CFLAGS"
AC_SUBST(F_OMIT_FRAME_POINTER)

676
677
678
679
680
681
682
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)

683
684
685
686
687
688
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
689
    TOR_SEARCH_LIBRARY(libnatpmp, $trylibnatpmpdir, [-lnatpmp $TOR_LIB_WS32 $TOR_LIB_IPHLPAPI],
690
        [#include <natpmp.h>],
691
        [#ifdef _WIN32
Steven Murdoch's avatar
Steven Murdoch committed
692
693
694
         #define STATICLIB
         #endif
         #include <natpmp.h>],
695
696
697
        [   int r;
            natpmp_t natpmp;
            natpmpresp_t response;
698
            r = initnatpmp(&natpmp, 0, 0);],
699
700
701
702
703
704
705
706
707
708
709
710
            [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
711
    AC_DEFINE(MINIUPNPC, 1, [Define to 1 if we are building with UPnP.])
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739

    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
740
741
fi

742
743
744
dnl ============================================================
dnl Check for libseccomp

745
746
747
748
if test "x$enable_seccomp" != "xno"; then
  AC_CHECK_HEADERS([seccomp.h])
  AC_SEARCH_LIBS(seccomp_init, [seccomp])
fi
749

750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
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)));
771
772
773
	int func(uint64_t a, uint64_t b) {
  	     uint128_t c = ((uint128_t)a) * b;
             int ok = ((uint64_t)(c>>96)) == 522859 &&
774
775
776
	           (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
                   (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
                   (((uint64_t)(c))&0xffffffffL) == 0;
777
778
             return ok;
        }
779
	], [dnl
780
781
	  int ok = func( ((uint64_t)2000000000) * 1000000000,
	  	         ((uint64_t)1234567890) << 24);
782
          return !ok;
783
784
785
        ])],
	[tor_cv_can_use_curve25519_donna_c64=yes],
        [tor_cv_can_use_curve25519_donna_c64=no],
786
	[AC_LINK_IFELSE(
787
          [AC_LANG_PROGRAM([dnl
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
        #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;
        ])],
803
804
805
            [tor_cv_can_use_curve25519_donna_c64=cross],
	    [tor_cv_can_use_curve25519_donna_c64=no])])])

806
807
808
  AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
                    nacl/crypto_scalarmult_curve25519.h])

809
  AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
810
811
812
813
814
    tor_cv_can_use_curve25519_nacl,
    [tor_saved_LIBS="$LIBS"
     LIBS="$LIBS -lnacl"
     AC_LINK_IFELSE(
       [AC_LANG_PROGRAM([dnl
815
         #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
816
         #include <crypto_scalarmult_curve25519.h>
817
818
819
	 #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
	 #include <nacl/crypto_scalarmult_curve25519.h>
	 #endif
820
         #ifdef crypto_scalarmult_curve25519_ref_BYTES
821
	 #error Hey, this is the reference implementation! That's not fast.
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
	 #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)

862
dnl Make sure to enable support for large off_t if available.
863
864
AC_SYS_LARGEFILE

865
866
867
868
869
870
871
872
873
874
875
876
877
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.))
878

879
880
dnl These headers are not essential

881
882
AC_CHECK_HEADERS(
        arpa/inet.h \
883
        crt_externs.h \
Nick Mathewson's avatar
Nick Mathewson committed
884
        execinfo.h \
885
        grp.h \
Sebastian Hahn's avatar
Sebastian Hahn committed
886
        ifaddrs.h \
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
        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 \
906
        sys/select.h \
907
        sys/socket.h \
908
	sys/sysctl.h \
909
910
911
912
913
914
915
916
917
        sys/syslimits.h \
        sys/time.h \
        sys/types.h \
        sys/un.h \
        sys/utime.h \
        sys/wait.h \
        syslog.h \
        utime.h
)
918

919
920
AC_CHECK_HEADERS(sys/param.h)

921
AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
922
923
924
925
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
926
927
#include <sys/socket.h>
#endif])
928
AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
929
930
931
932
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
933
#include <sys/socket.h>
934
935
936
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
937
#endif])
938
AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
939
        linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
940
941
942
943
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
944
#include <sys/socket.h>
945
#endif
946
947
948
949
950
951
952
953
954
#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
955
956
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
957
#endif])
958
959
960

if test x$transparent = xtrue ; then
   transparent_ok=0
961
   if test x$net_if_found = x1 && test x$net_pfvar_found = x1 ; then
962
963
964
965
966
     transparent_ok=1
   fi
   if test x$linux_netfilter_ipv4 = x1 ; then
     transparent_ok=1
   fi
967
   if test x$transparent_ok = x1 ; then
968
969
     AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
     case $host in
970
       *-*-openbsd* | *-*-bitrig*)
971
972
973
974
975
976
977
         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

978
979
980
981
982
983
984
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])
985

986
987
988
dnl In case we aren't given a working stdint.h, we'll need to grow our own.
dnl Watch out.

989
990
991
992
993
994
995
996
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)
997
998
AC_CHECK_SIZEOF(intptr_t)
AC_CHECK_SIZEOF(uintptr_t)
999

1000
dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])