configure.ac 51 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) 2007-2015, The Tor Project, Inc.
Nick Mathewson's avatar
Nick Mathewson committed
4
dnl See LICENSE for licensing information
5

6
AC_INIT([tor],[0.2.8.0-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
16
PKG_PROG_PKG_CONFIG

17
if test -f /etc/redhat-release ; then
18
  if test -f /usr/kerberos/include ; then
19
    CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
20
  fi
21
fi
22

23
24
# 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
25
CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
26

27
#XXXX020 We should make these enabled or not, before 0.2.0.x-final
28
AC_ARG_ENABLE(openbsd-malloc,
29
   AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD.  Linux only]))
30
AC_ARG_ENABLE(instrument-downloads,
31
   AS_HELP_STRING(--enable-instrument-downloads, [instrument downloads of directory resources etc.]))
32
AC_ARG_ENABLE(static-openssl,
33
   AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
34
AC_ARG_ENABLE(static-libevent,
35
   AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
36
AC_ARG_ENABLE(static-zlib,
37
   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
AC_ARG_ENABLE(unittests,
41
   AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
42
AC_ARG_ENABLE(coverage,
43
   AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
44
AC_ARG_ENABLE(system-torrc,
45
   AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
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
61
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

62
AM_CONDITIONAL(USE_OPENBSD_MALLOC, test x$enable_openbsd_malloc = xyes)
63
if test x$enable_instrument_downloads = xyes; then
64
65
66
  AC_DEFINE(INSTRUMENT_DOWNLOADS, 1,
            [Defined if we want to keep track of how much of each kind of resource we download.])
fi
67

68
AC_ARG_ENABLE(transparent,
69
     AS_HELP_STRING(--disable-transparent, [disable transparent proxy support]),
70
71
72
73
74
75
     [case "${enableval}" in
        yes) transparent=true ;;
        no)  transparent=false ;;
        *) AC_MSG_ERROR(bad value for --enable-transparent) ;;
      esac], [transparent=true])

76
AC_ARG_ENABLE(asciidoc,
77
     AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
78
79
80
81
82
83
     [case "${enableval}" in
        yes) asciidoc=true ;;
        no)  asciidoc=false ;;
        *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
      esac], [asciidoc=true])

84
85
# systemd notify support
AC_ARG_ENABLE(systemd,
86
      AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
87
88
89
90
91
92
93
94
95
      [case "${enableval}" in
        yes) systemd=true ;;
        no)  systemd=false ;;
        * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
      esac], [systemd=auto])



# systemd support
96
if test x$enable_systemd = xno ; then
97
98
99
100
101
102
    have_systemd=no;
else
    PKG_CHECK_MODULES(SYSTEMD,
        [libsystemd-daemon],
        have_systemd=yes,
        have_systemd=no)
103
104
105
106
107
108
109
    if test x$have_systemd=xno; then
        AC_MSG_NOTICE([Okay, checking for systemd a different way...])
        PKG_CHECK_MODULES(SYSTEMD,
            [libsystemd],
            have_systemd=yes,
            have_systemd=no)
    fi
110
111
112
113
fi

if test x$have_systemd = xyes; then
    AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
114
    TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
115
    TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
116
    PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
117
         [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
118
fi
119
AC_SUBST(TOR_SYSTEMD_CFLAGS)
120
121
122
123
124
125
AC_SUBST(TOR_SYSTEMD_LIBS)

if test x$enable_systemd = xyes -a x$have_systemd != xyes ; then
    AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
fi

126
127
128
129
130
131
case $host in
   *-*-solaris* )
     AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
     ;;
esac

132
AC_ARG_ENABLE(gcc-warnings,
133
     AS_HELP_STRING(--enable-gcc-warnings, [enable verbose warnings]))
134
135
AC_ARG_ENABLE(gcc-warnings-advisory,
     AS_HELP_STRING(--enable-gcc-warnings-advisory, [enable verbose warnings, excluding -Werror]))
136

137
138
dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
AC_ARG_ENABLE(gcc-hardening,
139
    AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
140

141
AC_ARG_ENABLE(expensive-hardening,
142
    AS_HELP_STRING(--enable-expensive-hardening, [enable more expensive compiler hardening; makes Tor slower]))
143

144
145
146
dnl Linker hardening options
dnl Currently these options are ELF specific - you can't use this with MacOSX
AC_ARG_ENABLE(linker-hardening,
147
    AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
148

149
AC_ARG_ENABLE(local-appdata,
150
   AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
151
152
153
154
155
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

156
157
# Tor2web mode flag
AC_ARG_ENABLE(tor2web-mode,
158
     AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
159
160
161
162
[if test x$enableval = xyes; then
    CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
fi])

163
AC_ARG_ENABLE(bufferevents,
164
     AS_HELP_STRING(--enable-bufferevents, [use Libevent's buffered IO]))
165

166
AC_ARG_ENABLE(tool-name-check,
167
     AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
168

169
AC_ARG_ENABLE(seccomp,
170
     AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
171

172
AC_ARG_ENABLE(libscrypt,
173
     AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
174

175
176
177
178
179
180
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

181
182
183
184
185
186
187
188
189
190
191
192
193
194
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

195
AC_PROG_CC
196
AC_PROG_CPP
197
198
AC_PROG_MAKE_SET
AC_PROG_RANLIB
199

200
201
AC_PATH_PROG([PERL], [perl])

202
203
dnl autoconf 2.59 appears not to support AC_PROG_SED
AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
204

205
206
dnl check for asciidoc and a2x
AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
207
AC_PATH_PROGS([A2X], [a2x a2x.py], none)
208
209

AM_CONDITIONAL(USE_ASCIIDOC, test x$asciidoc = xtrue)
210

211
212
213
214
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
215
AC_PROG_CC_C99
216

217
AC_ARG_VAR([PYTHON], [path to Python binary])
218
AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
219
220
221
222
223
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"])

224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
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
240
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
241
 else
242
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
243
244
245
 fi
])

246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
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

268
269
TORUSER=_tor
AC_ARG_WITH(tor-user,
270
        AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
271
272
273
274
275
276
277
278
        [
           TORUSER=$withval
        ]
)
AC_SUBST(TORUSER)

TORGROUP=_tor
AC_ARG_WITH(tor-group,
279
        AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
280
281
282
283
284
285
        [
           TORGROUP=$withval
        ]
)
AC_SUBST(TORGROUP)

286

287
dnl If _WIN32 is defined and non-zero, we are building for win32
288
AC_MSG_CHECKING([for win32])
289
AC_RUN_IFELSE([AC_LANG_SOURCE([
290
int main(int c, char **v) {
291
292
#ifdef _WIN32
#if _WIN32
293
294
295
296
297
298
299
  return 0;
#else
  return 1;
#endif
#else
  return 2;
#endif
300
}])],
301
bwin32=true; AC_MSG_RESULT([yes]),
302
303
bwin32=false; AC_MSG_RESULT([no]),
bwin32=cross; AC_MSG_RESULT([cross])
304
305
)

306
if test "$bwin32" = cross; then
307
AC_MSG_CHECKING([for win32 (cross)])
308
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
309
#ifdef _WIN32
310
311
312
313
314
int main(int c, char **v) {return 0;}
#else
#error
int main(int c, char **v) {return x(y);}
#endif
315
])],
316
317
318
319
bwin32=true; AC_MSG_RESULT([yes]),
bwin32=false; AC_MSG_RESULT([no]))
fi

320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
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
])

Nick Mathewson's avatar
Nick Mathewson committed
339

340
AM_CONDITIONAL(BUILD_NT_SERVICES, test x$bwin32 = xtrue)
341

342
343
dnl Enable C99 when compiling with MIPSpro
AC_MSG_CHECKING([for MIPSpro compiler])
344
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
345
346
347
348
#if (defined(__sgi) && defined(_COMPILER_VERSION))
#error
  return x(y);
#endif
349
])],
350
bmipspro=false; AC_MSG_RESULT(no),
351
bmipspro=true; AC_MSG_RESULT(yes))
352

353
if test "$bmipspro" = true; then
354
355
356
  CFLAGS="$CFLAGS -c99"
fi

357
358
AC_C_BIGENDIAN

359
AC_SEARCH_LIBS(socket, [socket network])
360
AC_SEARCH_LIBS(gethostbyname, [nsl])
361
AC_SEARCH_LIBS(dlopen, [dl])
362
AC_SEARCH_LIBS(inet_aton, [resolv])
363
AC_SEARCH_LIBS(backtrace, [execinfo])
364
365
366
367
368
369
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
370

371
372
AC_SEARCH_LIBS(pthread_create, [pthread])
AC_SEARCH_LIBS(pthread_detach, [pthread])
373

374
375
AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
376

377
AC_CHECK_FUNCS(
378
        _NSGetEnviron \
Sebastian Hahn's avatar
Sebastian Hahn committed
379
        accept4 \
Nick Mathewson's avatar
Nick Mathewson committed
380
381
        backtrace \
        backtrace_symbols_fd \
Sebastian Hahn's avatar
Sebastian Hahn committed
382
        clock_gettime \
383
	eventfd \
384
385
386
        flock \
        ftime \
        getaddrinfo \
Sebastian Hahn's avatar
Sebastian Hahn committed
387
        getifaddrs \
388
        getpass \
389
390
391
392
        getrlimit \
        gettimeofday \
        gmtime_r \
        inet_aton \
Sebastian Hahn's avatar
Sebastian Hahn committed
393
        ioctl \
394
        issetugid \
395
        llround \
396
        localtime_r \
Sebastian Hahn's avatar
Sebastian Hahn committed
397
        lround \
398
        memmem \
399
400
	pipe \
	pipe2 \
401
        prctl \
402
	readpassphrase \
Sebastian Hahn's avatar
Sebastian Hahn committed
403
        rint \
Nick Mathewson's avatar
Nick Mathewson committed
404
        sigaction \
405
        socketpair \
406
	statvfs \
407
408
        strlcat \
        strlcpy \
409
	strnlen \
410
411
412
413
        strptime \
        strtok_r \
        strtoull \
        sysconf \
414
	sysctl \
415
        uname \
416
	usleep \
417
        vasprintf \
418
	_vscprintf
419
)
420

421
if test "$bwin32" != true; then
422
423
424
425
  AC_CHECK_HEADERS(pthread.h)
  AC_CHECK_FUNCS(pthread_create)
fi

426
427
428
429
430
431
432
433
if test "$bwin32" = true; then
  AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
#include <windows.h>
#include <conio.h>
#include <wchar.h>
                 ])
fi

434
435
AM_CONDITIONAL(BUILD_READPASSPHRASE_C, test x$ac_cv_func_readpassphrase = xno && test $bwin32 = false)

436
dnl ------------------------------------------------------
437
dnl Where do you live, libevent?  And how do we call you?
438

439
if test "$bwin32" = true; then
440
  TOR_LIB_WS32=-lws2_32
441
  TOR_LIB_IPHLPAPI=-liphlpapi
442
443
  # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  # think it's actually necessary.
444
  TOR_LIB_GDI=-lgdi32
Nick Mathewson's avatar
   
Nick Mathewson committed
445
else
446
447
  TOR_LIB_WS32=
  TOR_LIB_GDI=
Nick Mathewson's avatar
   
Nick Mathewson committed
448
fi
449
450
AC_SUBST(TOR_LIB_WS32)
AC_SUBST(TOR_LIB_GDI)
451
AC_SUBST(TOR_LIB_IPHLPAPI)
Nick Mathewson's avatar
   
Nick Mathewson committed
452

453
tor_libevent_pkg_redhat="libevent"
454
tor_libevent_pkg_debian="libevent-dev"
455
456
457
tor_libevent_devpkg_redhat="libevent-devel"
tor_libevent_devpkg_debian="libevent-dev"

458
459
460
461
462
463
464
465
466
467
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], [
468
#ifdef _WIN32
469
470
#include <winsock2.h>
#endif
471
#include <stdlib.h>
472
#include <sys/time.h>
Roger Dingledine's avatar
Roger Dingledine committed
473
#include <sys/types.h>
474
#include <event.h>], [
475
#ifdef _WIN32
476
477
478
#include <winsock2.h>
#endif
void exit(int); void *event_init(void);],
479
    [
480
#ifdef _WIN32
481
{WSADATA d; WSAStartup(0x101,&d); }
482
483
484
#endif
event_init(); exit(0);
], [--with-libevent-dir], [/opt/libevent])
485

486
dnl Now check for particular libevent functions.
487
488
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
489
save_CPPFLAGS="$CPPFLAGS"
490
LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
491
LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
492
CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
493
AC_CHECK_FUNCS([event_get_version_number \
494
                evutil_secure_rng_set_urandom_device_file \
495
                evutil_secure_rng_init \
496
               ])
497
498
499
500
AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
[#include <event.h>
])

501
AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
502

503
LIBS="$save_LIBS"
504

505
506
AM_CONDITIONAL(USE_EXTERNAL_EVDNS, test x$ac_cv_header_event2_dns_h = xyes)

507
508
509
510
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
511
     TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
512
513
   fi
else
514
515
516
517
518
519
520
521
522
523
524
525
526
     if test x$ac_cv_header_event2_event_h = "xyes"; then
       AC_SEARCH_LIBS(event_new, [event event_core])
       AC_SEARCH_LIBS(evdns_base_new, [event event_extra])

       if test $ac_cv_search_event_new != "none required"; then
         TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
       fi
       if test $ac_cv_search_evdns_base_new != "none required"; then
         TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
       fi
     else
       TOR_LIBEVENT_LIBS="-levent"
     fi
527
528
fi

529
530
531
532
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

533
534
dnl This isn't the best test for Libevent 2.0.3-alpha.  Once it's released,
dnl we can do much better.
535
536
if test "$enable_bufferevents" = "yes" ; then
  if test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes" ; then
537
    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.])
538
539
540
541
542
543
  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])
544
    AC_COMPILE_IFELSE([AC_LANG_SOURCE([
545
546
547
548
549
550
551
#include <event2/event.h>
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 10
#error
int x = y(zz);
#else
int x = 1;
#endif
552
  ])], [event_version_number_works=yes; AC_MSG_RESULT([yes]) ],
553
554
555
556
557
     [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])
558
      AC_COMPILE_IFELSE([AC_LANG_SOURCE([
559
#include <event2/event.h>
560
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000d00
561
562
563
564
565
#error
int x = y(zz);
#else
int x = 1;
#endif
566
   ])], [ AC_MSG_RESULT([yes]) ],
567
      [ AC_MSG_RESULT([no])
568
        AC_MSG_ERROR([Libevent does not seem new enough to support bufferevents.  We require 2.0.13-stable or later]) ] )
569
570
    fi
  fi
571
572
fi

573
574
575
576
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

577
578
AM_CONDITIONAL(USE_BUFFEREVENTS, test "$enable_bufferevents" = "yes")
if test "$enable_bufferevents" = "yes"; then
579
580
581
582
583
584
  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
585
fi
586
AC_SUBST(TOR_LIBEVENT_LIBS)
587

588
589
590
591
592
593
594
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="$LIBS"
595
596
597
AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
if test "$ac_cv_search_pow" != "none required"; then
    TOR_LIB_MATH="$ac_cv_search_pow"
598
599
600
601
fi
LIBS="$save_LIBS"
AC_SUBST(TOR_LIB_MATH)

602
dnl ------------------------------------------------------
603
dnl Where do you live, openssl?  And how do we call you?
604

605
tor_openssl_pkg_redhat="openssl"
606
tor_openssl_pkg_debian="libssl-dev"
607
608
609
tor_openssl_devpkg_redhat="openssl-devel"
tor_openssl_devpkg_debian="libssl-dev"

610
611
ALT_openssl_WITHVAL=""
AC_ARG_WITH(ssl-dir,
612
  AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
613
614
615
616
617
618
  [
      if test "x$withval" != xno && test "x$withval" != "x" ; then
         ALT_openssl_WITHVAL="$withval"
      fi
  ])

619
TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
620
621
    [#include <openssl/rand.h>],
    [void RAND_add(const void *buf, int num, double entropy);],
622
    [RAND_add((void*)0,0,0); exit(0);], [],
623
    [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
624

625
626
dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()

627
628
629
630
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
631
     TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
632
633
   fi
else
634
     TOR_OPENSSL_LIBS="-lssl -lcrypto"
635
636
637
fi
AC_SUBST(TOR_OPENSSL_LIBS)

638
639
640
641
642
643
644
dnl Now check for particular openssl functions.
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
save_CPPFLAGS="$CPPFLAGS"
LIBS="$TOR_OPENSSL_LIBS $LIBS"
LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
645
646
647
648
649
650
651

AC_TRY_COMPILE([
#include <openssl/opensslv.h>
#if OPENSSL_VERSION_NUMBER < 0x1000000fL
#error "too old"
#endif
   ], [],
652
   [ : ],
653
654
   [ AC_ERROR([OpenSSL is too old. We require 1.0.0 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])

655
656
657
658
659
660
661
662
663
664
665
666
667
AC_TRY_COMPILE([
#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
   ], [],
   [ : ],
   [ AC_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.]) ])

668
669
670
671
AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
[#include <openssl/ssl.h>
])

672
673
674
675
676
AC_CHECK_FUNCS([ \
		SSL_SESSION_get_master_key \
		SSL_get_server_random \
                SSL_get_client_ciphers \
                SSL_get_client_random \
677
		SSL_CIPHER_find \
678
		TLS_method
679
	       ])
rl1987's avatar
rl1987 committed
680
681
682
683

dnl Check if OpenSSL has scrypt implementation.
AC_CHECK_FUNCS([ EVP_PBE_scrypt ])

684
685
686
687
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

688
689
690
dnl ------------------------------------------------------
dnl Where do you live, zlib?  And how do we call you?

691
692
693
694
tor_zlib_pkg_redhat="zlib"
tor_zlib_pkg_debian="zlib1g"
tor_zlib_devpkg_redhat="zlib-devel"
tor_zlib_devpkg_debian="zlib1g-dev"
695
696
697
698
699
700
701

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

702
703
704
705
706
707
708
709
710
711
712
713
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)

714
715
716
717
718
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.
719

720
all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
721
all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI"
722

723
724
725
726
727
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
#if !defined(__clang__)
#error
#endif])], have_clang=yes, have_clang=no)

728
729
if test x$enable_gcc_hardening != xno; then
    CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
730
731
732
    if test x$have_clang = xyes; then
        TOR_CHECK_CFLAGS(-Qunused-arguments)
    fi
733
734
735
    TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
    AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
    AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
736
m4_ifdef([AS_VAR_IF],[
737
738
739
740
    AS_VAR_IF(can_compile, [yes],
        AS_VAR_IF(can_link, [yes],
                  [],
                  AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
741
        )])
742
743
    AS_VAR_POPDEF([can_link])
    AS_VAR_POPDEF([can_compile])
744
745
746
    TOR_CHECK_CFLAGS(-Wstack-protector)
    TOR_CHECK_CFLAGS(-fwrapv)
    TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
747
748
749
750
    if test "$bwin32" = "false"; then
       TOR_CHECK_CFLAGS(-fPIE)
       TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
    fi
751
fi
752

753
754
755
756
757
758
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

759
760
761
if test x$enable_linker_hardening != xno; then
    TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
fi
762

763
764
765
# For backtrace support
TOR_CHECK_LDFLAGS(-rdynamic)

766
dnl ------------------------------------------------------
767
768
769
770
dnl Now see if we have a -fomit-frame-pointer compiler option.

saved_CFLAGS="$CFLAGS"
TOR_CHECK_CFLAGS(-fomit-frame-pointer)
771
F_OMIT_FRAME_POINTER=''
772
if test "$saved_CFLAGS" != "$CFLAGS"; then
773
774
775
  if test x$enable_expensive_hardening != xyes ; then
    F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  fi
776
777
778
779
fi
CFLAGS="$saved_CFLAGS"
AC_SUBST(F_OMIT_FRAME_POINTER)

780
781
782
783
784
785
786
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)

787
788
789
dnl ============================================================
dnl Check for libseccomp

790
791
792
793
if test "x$enable_seccomp" != "xno"; then
  AC_CHECK_HEADERS([seccomp.h])
  AC_SEARCH_LIBS(seccomp_init, [seccomp])
fi
794

795
796
797
798
799
800
801
802
dnl ============================================================
dnl Check for libscrypt

if test "x$enable_libscrypt" != "xno"; then
  AC_CHECK_HEADERS([libscrypt.h])
  AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
fi

803
804
805
806
807
808
809
810
811
812
dnl ============================================================
dnl We need an implementation of curve25519.

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

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
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
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)));
  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;
      ])],
  [tor_cv_can_use_curve25519_donna_c64=yes],
      [tor_cv_can_use_curve25519_donna_c64=no],
  [AC_LINK_IFELSE(
        [AC_LANG_PROGRAM([dnl
      #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;
      ])],
          [tor_cv_can_use_curve25519_donna_c64=cross],
      [tor_cv_can_use_curve25519_donna_c64=no])])])

AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
                  nacl/crypto_scalarmult_curve25519.h])

AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  tor_cv_can_use_curve25519_nacl,
  [tor_saved_LIBS="$LIBS"
   LIBS="$LIBS -lnacl"
   AC_LINK_IFELSE(
     [AC_LANG_PROGRAM([dnl
       #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
       #include <crypto_scalarmult_curve25519.h>
   #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
   #include <nacl/crypto_scalarmult_curve25519.h>
   #endif
       #ifdef crypto_scalarmult_curve25519_ref_BYTES
   #error Hey, this is the reference implementation! That's not fast.
   #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
892
893
894
895
896
897
898
899
900
901
902
903
904

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)
AC_SUBST(CURVE25519_LIBS)

905
dnl Make sure to enable support for large off_t if available.
906
907
AC_SYS_LARGEFILE

908
909
910
911
912
913
914
915
916
917
918
919
920
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.))
921

922
923
dnl These headers are not essential

924
925
AC_CHECK_HEADERS(
        arpa/inet.h \
926
        crt_externs.h \
Nick Mathewson's avatar
Nick Mathewson committed
927
        execinfo.h \
928
        grp.h \
Sebastian Hahn's avatar
Sebastian Hahn committed
929
        ifaddrs.h \
930
931
932
933
934
935
936
937
938
939
940
        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 \
941
	readpassphrase.h \
942
        stdint.h \
943
	sys/eventfd.h \
944
945
946
947
948
949
950
        sys/file.h \
        sys/ioctl.h \
        sys/limits.h \
        sys/mman.h \
        sys/param.h \
        sys/prctl.h \
        sys/resource.h \
951
        sys/select.h \
952
        sys/socket.h \
953
	sys/statvfs.h \
954
	sys/sysctl.h \
955
956
957
958
959
960
961
962
963
        sys/syslimits.h \
        sys/time.h \
        sys/types.h \
        sys/un.h \
        sys/utime.h \
        sys/wait.h \
        syslog.h \
        utime.h
)
964

965
966
AC_CHECK_HEADERS(sys/param.h)

967
AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
968
969
970
971
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
972
973
#include <sys/socket.h>
#endif])
974
AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
975
976
977
978
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
979
#include <sys/socket.h>
980
981
982
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
983
984
985
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
986
#endif])
987
988
989
990
991
992
993
994

AC_CHECK_HEADERS(linux/if.h,[],[],
[
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
])

995
AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
996
        linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
997
998
999
1000
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
1001
#include <sys/socket.h>
1002
#endif
1003
1004
1005
1006
1007
1008
1009
1010
1011
#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
1012
1013
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
1014
#endif])
1015

1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
        linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#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
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_LINUX_IF_H
#include <linux/if.h>
#endif])

1040
1041
if test x$transparent = xtrue ; then
   transparent_ok=0
1042
   if test x$net_if_found = x1 && test x$net_pfvar_found = x1 ; then
1043
1044
1045
1046
1047
     transparent_ok=1
   fi
   if test x$linux_netfilter_ipv4 = x1 ; then
     transparent_ok=1
   fi
1048
1049
1050
   if test x$linux_netfilter_ipv6_ip6_tables = x1 ; then
     transparent_ok=1
   fi
1051
   if test x$transparent_ok = x1 ; then
1052
1053
     AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
     case $host in
1054
       *-*-openbsd* | *-*-bitrig*)
1055
1056
1057
1058
1059
1060
1061
         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

1062
1063
1064
1065
1066
1067
1068
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])
1069

1070
1071
1072
dnl In case we aren't given a working stdint.h, we'll need to grow our own.
dnl Watch out.

1073
1074
1075
1076
1077
1078
1079
1080
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)
1081
1082
AC_CHECK_SIZEOF(intptr_t)
AC_CHECK_SIZEOF(uintptr_t)
1083

1084
dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
1085

1086
1087
1088
1089
1090
1091
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)
1092
AC_CHECK_SIZEOF(void *)
1093
AC_CHECK_SIZEOF(time_t)
1094
AC_CHECK_SIZEOF(size_t)
1095
AC_CHECK_SIZEOF(pid_t)
1096

1097
AC_CHECK_TYPES([uint, u_char, ssize_t])
1098

1099
AC_PC_FROM_UCONTEXT([:])
1100

1101
1102
dnl used to include sockaddr_storage, but everybody has that.
AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
1103
1104
1105
1106
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
1107
1108
1109
1110
1111
1112
1113
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
1114
#endif
1115
#ifdef _WIN32
1116
#define _WIN32_WINNT 0x0501
1117
1118
1119
1120
1121
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
])
1122
AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
1135
#ifdef _WIN32
1136
#define _WIN32_WINNT 0x0501
1137
1138
1139
1140
1141
1142
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#endif
])
1143

1144
AC_CHECK_TYPES([rlim_t], , ,
1145
1146
1147
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
1148
1149
1150
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
1151
#ifdef HAVE_SYS_RESOURCE_H
1152
1153
1154
1155
#include <sys/resource.h>
#endif
])

1156
1157
1158
AX_CHECK_SIGN([time_t],
       [ AC_DEFINE(TIME_T_IS_SIGNED, 1, [Define if time_t is signed]) ],
       [ : ], [
1159
1160
1161
1162
1163
1164
1165
1166
1167
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_TIME_H
#include <time.h>
#endif
1168
])
1169

1170
1171
1172
1173
if test "$ax_cv_decl_time_t_signed" = no; then
  AC_MSG_WARN([You have an unsigned time_t; some things will probably break. Please tell the Tor developers about your interesting platform.])
fi

1174
1175
1176
AX_CHECK_SIGN([size_t],
       [ tor_cv_size_t_signed=yes ],
       [ tor_cv_size_t_signed=no ], [
1177
1178
1179
1180
1181
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
])

1182
if test "$ax_cv_decl_size_t_signed" = yes; then
1183
1184
1185
  AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
fi

1186
1187
1188
1189
1190
1191
AX_CHECK_SIGN([enum always],
       [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
       [ : ], [
 enum always { AAA, BBB, CCC };
])

1192
1193
1194
1195
1196
AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
])
1197

1198
1199
1200
1201
# We want to make sure that we _don't_ have a cell_t defined, like IRIX does.

AC_CHECK_SIZEOF(cell_t)

1202
1203
1204
1205
# Now make sure that NULL can be represented as zero bytes.
AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
[AC_RUN_IFELSE([AC_LANG_SOURCE(
[[#include <stdlib.h>
1206
#include <string.h>
1207
1208
1209
1210
#include <stdio.h>
#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif
1211
int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
1212
return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
1213
1214
1215
1216
       [tor_cv_null_is_zero=yes],
       [tor_cv_null_is_zero=no],
       [tor_cv_null_is_zero=cross])])

1217
if test "$tor_cv_null_is_zero" = cross ; then
1218
1219
1220
1221
  # Cross-compiling; let's hope that the target isn't raving mad.
  AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
fi