configure.ac 72.7 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) 2007-2017, The Tor Project, Inc.
Nick Mathewson's avatar
Nick Mathewson committed
4
dnl See LICENSE for licensing information
5

6
AC_PREREQ([2.63])
7
AC_INIT([tor],[0.3.4.0-alpha-dev])
Stewart Smith's avatar
Stewart Smith committed
8
AC_CONFIG_SRCDIR([src/or/main.c])
9
AC_CONFIG_MACRO_DIR([m4])
10
11
12
13

# "foreign" means we don't follow GNU package layout standards
# "1.11" means we require automake version 1.11 or newer
# "subdir-objects" means put .o files in the same directory as the .c files
14
AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
15

16
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
17
AC_CONFIG_HEADERS([orconfig.h])
18

19
AC_USE_SYSTEM_EXTENSIONS
20
21
AC_CANONICAL_HOST

22
23
PKG_PROG_PKG_CONFIG

24
25
if test -f "/etc/redhat-release"; then
  if test -f "/usr/kerberos/include"; then
26
    CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
27
  fi
28
fi
29

30
31
# 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
32
CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
33

34
AC_ARG_ENABLE(openbsd-malloc,
35
   AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD.  Linux only]))
36
AC_ARG_ENABLE(static-openssl,
37
   AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
38
AC_ARG_ENABLE(static-libevent,
39
   AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
40
AC_ARG_ENABLE(static-zlib,
41
   AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
42
AC_ARG_ENABLE(static-tor,
43
   AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
44
AC_ARG_ENABLE(unittests,
45
   AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
46
AC_ARG_ENABLE(coverage,
47
   AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
48
49
AC_ARG_ENABLE(asserts-in-tests,
   AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
50
AC_ARG_ENABLE(system-torrc,
51
   AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
Nick Mathewson's avatar
Nick Mathewson committed
52
AC_ARG_ENABLE(libfuzzer,
53
54
55
   AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
AC_ARG_ENABLE(oss-fuzz,
   AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
56
57
AC_ARG_ENABLE(memory-sentinels,
   AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
58
59
AC_ARG_ENABLE(rust,
   AS_HELP_STRING(--enable-rust, [enable rust integration]))
60
61
AC_ARG_ENABLE(cargo-online-mode,
   AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
62
63
AC_ARG_ENABLE(restart-debugging,
   AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
64
65
AC_ARG_ENABLE(zstd-advanced-apis,
   AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
66

67
if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
68
69
70
    AC_MSG_ERROR([Can't disable assertions outside of coverage build])
fi

71
72
73
AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
Nick Mathewson's avatar
Nick Mathewson committed
74
AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
75
AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
76
AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
77

78
79
80
81
82
83
if test "$enable_static_tor" = "yes"; then
  enable_static_libevent="yes";
  enable_static_openssl="yes";
  enable_static_zlib="yes";
  CFLAGS="$CFLAGS -static"
fi
84

85
86
87
88
89
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

90
91
92
93
94
if test "$enable_memory_sentinels" = "no"; then
  AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
           [Defined if we're turning off memory safety code to look for bugs])
fi

95
AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
96

97
AC_ARG_ENABLE(asciidoc,
98
     AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
99
     [case "${enableval}" in
100
101
        "yes") asciidoc=true ;;
        "no")  asciidoc=false ;;
102
103
104
        *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
      esac], [asciidoc=true])

105
106
# systemd notify support
AC_ARG_ENABLE(systemd,
107
      AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
108
      [case "${enableval}" in
109
110
        "yes") systemd=true ;;
        "no")  systemd=false ;;
111
112
113
        * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
      esac], [systemd=auto])

114
115
116
117
if test "$enable_restart_debugging" = "yes"; then
  AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
            [Defined if we're building with support for in-process restart debugging.])
fi
118

119
120
121
122
if test "$enable_zstd_advanced_apis" != "no"; then
   AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
             [Defined if we're going to try to use zstd's "static-only" APIs.])
fi
123
124

# systemd support
125
if test "x$enable_systemd" = "xno"; then
126
127
128
129
130
131
    have_systemd=no;
else
    PKG_CHECK_MODULES(SYSTEMD,
        [libsystemd-daemon],
        have_systemd=yes,
        have_systemd=no)
132
    if test "x$have_systemd" = "xno"; then
133
134
135
136
137
138
        AC_MSG_NOTICE([Okay, checking for systemd a different way...])
        PKG_CHECK_MODULES(SYSTEMD,
            [libsystemd],
            have_systemd=yes,
            have_systemd=no)
    fi
139
140
fi

141
if test "x$have_systemd" = "xyes"; then
142
    AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
143
    TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
144
    TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
145
    PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
146
         [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
147
fi
148
AC_SUBST(TOR_SYSTEMD_CFLAGS)
149
150
AC_SUBST(TOR_SYSTEMD_LIBS)

151
if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
152
153
154
    AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
fi

155
case "$host" in
156
157
158
159
160
   *-*-solaris* )
     AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
     ;;
esac

161
AC_ARG_ENABLE(gcc-warnings,
162
163
164
     AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
AC_ARG_ENABLE(fatal-warnings,
     AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
165
AC_ARG_ENABLE(gcc-warnings-advisory,
166
     AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
167

168
169
dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
AC_ARG_ENABLE(gcc-hardening,
170
    AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
171

172
dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
173
AC_ARG_ENABLE(expensive-hardening,
174
175
176
177
178
179
    AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
AC_ARG_ENABLE(fragile-hardening,
    AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  fragile_hardening="yes"
fi
180

181
182
183
dnl Linker hardening options
dnl Currently these options are ELF specific - you can't use this with MacOSX
AC_ARG_ENABLE(linker-hardening,
184
    AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
185

186
AC_ARG_ENABLE(local-appdata,
187
   AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
188
189
190
191
192
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

193
194
# Tor2web mode flag
AC_ARG_ENABLE(tor2web-mode,
195
     AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
196
[if test "x$enableval" = "xyes"; then
197
198
199
    CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
fi])

200
AC_ARG_ENABLE(tool-name-check,
201
     AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
202

203
AC_ARG_ENABLE(seccomp,
204
     AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
205

206
AC_ARG_ENABLE(libscrypt,
207
     AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
208

209
210
211
212
213
214
215
216
217
218
dnl Enable event tracing which are transformed to debug log statement.
AC_ARG_ENABLE(event-tracing-debug,
     AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])

if test x$enable_event_tracing_debug = xyes; then
  AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
fi

219
220
221
222
223
224
225
226
227
228
229
230
231
232
dnl Enable Android only features.
AC_ARG_ENABLE(android,
     AS_HELP_STRING(--enable-android, [build with Android features enabled]))
AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])

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

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

fi

233
234
235
236
dnl ---
dnl Tor modules options. These options are namespaced with --disable-module-XXX
dnl ---

237
238
239
dnl All our modules.
m4_define(MODULES, dirauth)

240
241
242
243
244
245
246
247
248
dnl Directory Authority module.
AC_ARG_ENABLE([module-dirauth],
              AS_HELP_STRING([--disable-module-dirauth],
                             [Do not build tor with the dirauth module]),
              [], dnl Action if-given
              AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
                        [Compile with Directory Authority feature support]))
AM_CONDITIONAL(BUILD_MODULE_DIRAUTH, [test "x$enable_module_dirauth" != "xno"])

249
250
251
252
253
254
255
256
257
dnl Helper variables.
TOR_MODULES_ALL_ENABLED=
AC_DEFUN([ADD_MODULE], [
    MODULE=m4_toupper($1)
    TOR_MODULES_ALL_ENABLED="${TOR_MODULES_ALL_ENABLED} -DHAVE_MODULE_${MODULE}=1"
])
m4_foreach_w([module], MODULES, [ADD_MODULE([module])])
AC_SUBST(TOR_MODULES_ALL_ENABLED)

258
259
260
261
262
263
264
265
266
dnl check for the correct "ar" when cross-compiling.
dnl   (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
dnl    so kludge up a replacement for the case where it isn't there yet.)
m4_ifdef([AM_PROG_AR],
         [AM_PROG_AR],
         [AN_MAKEVAR([AR], [AC_PROG_AR])
          AN_PROGRAM([ar], [AC_PROG_AR])
          AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
          AC_PROG_AR])
267

268
269
270
271
272
273
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.
274
275
if test "x$enable_tool_name_check" != "xno"; then
    if test "x$ac_tool_warned" = "xyes"; then
276
        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.)])
277
	elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
278
279
280
281
		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

282
AC_PROG_CC
283
AC_PROG_CPP
284
285
AC_PROG_MAKE_SET
AC_PROG_RANLIB
286
AC_PROG_SED
287

288
289
290
AC_ARG_VAR([PERL], [path to Perl binary])
AC_CHECK_PROGS([PERL], [perl])
AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
291

292
293
dnl check for asciidoc and a2x
AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
294
AC_PATH_PROGS([A2X], [a2x a2x.py], none)
295

296
AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
297

298
AM_PROG_CC_C_O
299
AC_PROG_CC_C99
300

301
AC_ARG_VAR([PYTHON], [path to Python binary])
302
AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
303
304
305
306
307
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"])

308
dnl List all external rust crates we depend on here. Include the version
309
rust_crates="libc-0.2.39"
310
AC_SUBST(rust_crates)
311

312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
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])])
327
 if test "$tor_cv_flexarray" = "yes"; then
328
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
329
 else
330
   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
331
332
333
 fi
])

334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
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

356
357
TORUSER=_tor
AC_ARG_WITH(tor-user,
358
        AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
359
360
361
362
363
364
365
366
        [
           TORUSER=$withval
        ]
)
AC_SUBST(TORUSER)

TORGROUP=_tor
AC_ARG_WITH(tor-group,
367
        AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
368
369
370
371
372
373
        [
           TORGROUP=$withval
        ]
)
AC_SUBST(TORGROUP)

374

375
dnl If _WIN32 is defined and non-zero, we are building for win32
376
AC_MSG_CHECKING([for win32])
377
AC_RUN_IFELSE([AC_LANG_SOURCE([
378
int main(int c, char **v) {
379
380
#ifdef _WIN32
#if _WIN32
381
382
383
384
385
386
387
  return 0;
#else
  return 1;
#endif
#else
  return 2;
#endif
388
}])],
389
bwin32=true; AC_MSG_RESULT([yes]),
390
391
bwin32=false; AC_MSG_RESULT([no]),
bwin32=cross; AC_MSG_RESULT([cross])
392
393
)

394
if test "$bwin32" = "cross"; then
395
AC_MSG_CHECKING([for win32 (cross)])
396
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
397
#ifdef _WIN32
398
399
400
401
402
int main(int c, char **v) {return 0;}
#else
#error
int main(int c, char **v) {return x(y);}
#endif
403
])],
404
405
406
407
bwin32=true; AC_MSG_RESULT([yes]),
bwin32=false; AC_MSG_RESULT([no]))
fi

408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
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
427

428
AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
429
AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
430

431
432
dnl Enable C99 when compiling with MIPSpro
AC_MSG_CHECKING([for MIPSpro compiler])
433
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
434
435
436
437
#if (defined(__sgi) && defined(_COMPILER_VERSION))
#error
  return x(y);
#endif
438
])],
439
bmipspro=false; AC_MSG_RESULT(no),
440
bmipspro=true; AC_MSG_RESULT(yes))
441

442
if test "$bmipspro" = "true"; then
443
444
445
  CFLAGS="$CFLAGS -c99"
fi

446
447
AC_C_BIGENDIAN

448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
if test "x$enable_rust" = "xyes"; then
  AC_ARG_VAR([RUSTC], [path to the rustc binary])
  AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  if test "x$RUSTC" = "xno"; then
    AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  fi

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

  AC_DEFINE([HAVE_RUST], 1, [have Rust])
  if test "x$enable_cargo_online_mode" = "xyes"; then
    CARGO_ONLINE=
    RUST_DL=#
  else
    CARGO_ONLINE=--frozen
    RUST_DL=

    dnl When we're not allowed to touch the network, we need crate dependencies
    dnl locally available.
    AC_MSG_CHECKING([rust crate dependencies])
472
473
    AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
    if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
474
      TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
475
    fi
476
    dnl Check whether the path exists before we try to cd into it.
477
478
    if test ! -d "$TOR_RUST_DEPENDENCIES"; then
      AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
479
      ERRORED=1
480
    fi
481
482
483
484
    dnl Make the path absolute, since we'll be using it from within a
    dnl subdirectory.
    TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)

485
    for dep in $rust_crates; do
486
487
      if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
        AC_MSG_ERROR([Failure to find rust dependency $TOR_RUST_DEPENDENCIES/$dep. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
488
        ERRORED=1
489
490
      fi
    done
491
492
493
    if test "x$ERRORED" = "x"; then
      AC_MSG_RESULT([yes])
    fi
494
495
  fi

496
497
498
499
500
501
502
503
504
  dnl This is a workaround for #46797
  dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ).  Once the
  dnl upstream bug is fixed, we can remove this workaround.
  case "$host_os" in
      darwin*)
        TOR_RUST_EXTRA_LIBS="-lresolv"
	;;
  esac

505
506
507
  dnl For now both MSVC and MinGW rust libraries will output static libs with
  dnl the MSVC naming convention.
  if test "$bwin32" = "true"; then
508
    TOR_RUST_STATIC_NAME=tor_rust.lib
509
  else
510
    TOR_RUST_STATIC_NAME=libtor_rust.a
511
512
  fi

513
  AC_SUBST(TOR_RUST_STATIC_NAME)
514
515
516
517
518
  AC_SUBST(CARGO_ONLINE)
  AC_SUBST(RUST_DL)

  dnl Let's check the rustc version, too
  AC_MSG_CHECKING([rust version])
519
  RUSTC_VERSION=`$RUSTC --version`
520
521
522
523
524
525
526
527
  RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
    AC_MSG_ERROR([rustc version couldn't be identified])
  fi
  if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
    AC_MSG_ERROR([rustc must be at least version 1.14])
  fi
528
  AC_MSG_RESULT([$RUSTC_VERSION])
529
530
fi

531
532
AC_SUBST(TOR_RUST_EXTRA_LIBS)

533
AC_SEARCH_LIBS(socket, [socket network])
534
AC_SEARCH_LIBS(gethostbyname, [nsl])
535
AC_SEARCH_LIBS(dlopen, [dl])
536
AC_SEARCH_LIBS(inet_aton, [resolv])
537
AC_SEARCH_LIBS(backtrace, [execinfo])
538
539
540
541
542
543
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
544

545
546
AC_SEARCH_LIBS(pthread_create, [pthread])
AC_SEARCH_LIBS(pthread_detach, [pthread])
547

548
549
AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
550

551
AC_CHECK_FUNCS(
552
        _NSGetEnviron \
553
554
	RtlSecureZeroMemory \
	SecureZeroMemory \
Sebastian Hahn's avatar
Sebastian Hahn committed
555
        accept4 \
Nick Mathewson's avatar
Nick Mathewson committed
556
557
        backtrace \
        backtrace_symbols_fd \
558
	eventfd \
559
	explicit_bzero \
560
	timingsafe_memcmp \
561
562
        flock \
        ftime \
563
        get_current_dir_name \
564
        getaddrinfo \
Sebastian Hahn's avatar
Sebastian Hahn committed
565
        getifaddrs \
566
        getpass \
567
568
569
        getrlimit \
        gettimeofday \
        gmtime_r \
570
	gnu_get_libc_version \
571
	htonll \
572
        inet_aton \
Sebastian Hahn's avatar
Sebastian Hahn committed
573
        ioctl \
574
        issetugid \
575
        llround \
576
        localtime_r \
Sebastian Hahn's avatar
Sebastian Hahn committed
577
        lround \
578
	mach_approximate_time \
579
        memmem \
580
        memset_s \
581
        mmap \
582
583
	pipe \
	pipe2 \
584
        prctl \
585
	readpassphrase \
Sebastian Hahn's avatar
Sebastian Hahn committed
586
        rint \
Nick Mathewson's avatar
Nick Mathewson committed
587
        sigaction \
588
        socketpair \
589
	statvfs \
590
591
        strlcat \
        strlcpy \
592
	strnlen \
593
594
595
596
        strptime \
        strtok_r \
        strtoull \
        sysconf \
597
	sysctl \
Nick Mathewson's avatar
Nick Mathewson committed
598
	truncate \
599
        uname \
600
	usleep \
601
        vasprintf \
602
	_vscprintf
603
)
604

605
606
607
# Apple messed up when they added two functions functions in Sierra: they
# forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
# checks. So we should only probe for those functions if we are sure that we
608
# are not targeting OSX 10.11 or earlier.
609
AC_MSG_CHECKING([for a pre-Sierra OSX build target])
610
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
611
612
#ifdef __APPLE__
#  include <AvailabilityMacros.h>
613
614
#  ifndef MAC_OS_X_VERSION_10_12
#    define MAC_OS_X_VERSION_10_12 101200
615
616
#  endif
#  if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
617
#    if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
618
619
620
621
#      error "Running on Mac OSX 10.11 or earlier"
#    endif
#  endif
#endif
622
]], [[]])],
623
624
625
626
627
628
629
630
631
632
   [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
   [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])

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

633
if test "$bwin32" != "true"; then
634
635
  AC_CHECK_HEADERS(pthread.h)
  AC_CHECK_FUNCS(pthread_create)
636
  AC_CHECK_FUNCS(pthread_condattr_setclock)
637
638
fi

639
if test "$bwin32" = "true"; then
640
641
642
643
644
645
646
  AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
#include <windows.h>
#include <conio.h>
#include <wchar.h>
                 ])
fi

647
648
AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
649

650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
AC_MSG_CHECKING([whether free(NULL) works])
AC_RUN_IFELSE([AC_LANG_PROGRAM([
  #include <stdlib.h>
], [
char *p = NULL;
free(p);
])],
[free_null_ok=true; AC_MSG_RESULT(yes)],
[free_null_ok=false; AC_MSG_RESULT(no)],
[free_null_ok=cross; AC_MSG_RESULT(cross)])

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

665
dnl ------------------------------------------------------
666
dnl Where do you live, libevent?  And how do we call you?
667

668
if test "$bwin32" = "true"; then
669
  TOR_LIB_WS32=-lws2_32
670
  TOR_LIB_IPHLPAPI=-liphlpapi
671
672
  # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  # think it's actually necessary.
673
  TOR_LIB_GDI=-lgdi32
674
  TOR_LIB_USERENV=-luserenv
Nick Mathewson's avatar
   
Nick Mathewson committed
675
else
676
677
  TOR_LIB_WS32=
  TOR_LIB_GDI=
678
  TOR_LIB_USERENV=
Nick Mathewson's avatar
   
Nick Mathewson committed
679
fi
680
681
AC_SUBST(TOR_LIB_WS32)
AC_SUBST(TOR_LIB_GDI)
682
AC_SUBST(TOR_LIB_IPHLPAPI)
683
AC_SUBST(TOR_LIB_USERENV)
Nick Mathewson's avatar
   
Nick Mathewson committed
684

685
tor_libevent_pkg_redhat="libevent"
686
tor_libevent_pkg_debian="libevent-dev"
687
688
689
tor_libevent_devpkg_redhat="libevent-devel"
tor_libevent_devpkg_debian="libevent-dev"

690
691
692
693
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 "$enable_static_libevent" = "yes"; then
694
    if test "$have_rt" = "yes"; then
695
696
697
698
699
      STATIC_LIBEVENT_FLAGS=" -lrt "
    fi
fi

TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
700
#ifdef _WIN32
701
702
#include <winsock2.h>
#endif
703
#include <sys/time.h>
Roger Dingledine's avatar
Roger Dingledine committed
704
#include <sys/types.h>
705
#include <event2/event.h>], [
706
#ifdef _WIN32
707
708
#include <winsock2.h>
#endif
709
struct event_base;
710
711
struct event_base *event_base_new(void);
void event_base_free(struct event_base *);],
712
    [
713
#ifdef _WIN32
714
{WSADATA d; WSAStartup(0x101,&d); }
715
#endif
Alex Xu's avatar
Alex Xu committed
716
event_base_free(event_base_new());
717
], [--with-libevent-dir], [/opt/libevent])
718

719
dnl Determine the incantation needed to link libevent.
720
721
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
722
save_CPPFLAGS="$CPPFLAGS"
723
724

LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
725
LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
726
CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
727

728
729
AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)

730
731
732
733
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
734
     TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
735
736
   fi
else
737
     if test "x$ac_cv_header_event2_event_h" = "xyes"; then
Nick Mathewson's avatar
Nick Mathewson committed
738
739
       AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
       AC_SEARCH_LIBS(evdns_base_new, [event event_extra], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for evdns_base_new"))
740

741
       if test "$ac_cv_search_event_new" != "none required"; then
742
743
         TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
       fi
744
       if test "$ac_cv_search_evdns_base_new" != "none required"; then
745
746
747
         TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
       fi
     else
748
       AC_MSG_ERROR("libevent2 is required but the headers could not be found")
749
     fi
750
751
fi

752
753
754
755
756
dnl Now check for particular libevent functions.
AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
                evutil_secure_rng_add_bytes \
])

757
758
759
760
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

761
762
763
764
765
dnl Check that libevent is at least at version 2.0.10, the first stable
dnl release of its series
CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
AC_MSG_CHECKING([whether Libevent is new enough])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
766
#include <event2/event.h>
767
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
768
769
770
771
772
#error
int x = y(zz);
#else
int x = 1;
#endif
773
774
775
776
777
778
779
780
])], [ AC_MSG_RESULT([yes]) ],
   [ AC_MSG_RESULT([no])
     AC_MSG_ERROR([Libevent is not new enough.  We require 2.0.10-stable or later]) ] )

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

781
AC_SUBST(TOR_LIBEVENT_LIBS)
782

783
784
785
786
787
788
789
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="$LIBS"
790
791
792
AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
if test "$ac_cv_search_pow" != "none required"; then
    TOR_LIB_MATH="$ac_cv_search_pow"
793
794
795
796
fi
LIBS="$save_LIBS"
AC_SUBST(TOR_LIB_MATH)

797
dnl ------------------------------------------------------
798
dnl Where do you live, openssl?  And how do we call you?
799

800
tor_openssl_pkg_redhat="openssl"
801
tor_openssl_pkg_debian="libssl-dev"
802
803
804
tor_openssl_devpkg_redhat="openssl-devel"
tor_openssl_devpkg_debian="libssl-dev"

805
806
ALT_openssl_WITHVAL=""
AC_ARG_WITH(ssl-dir,
807
  AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
808
  [
809
      if test "x$withval" != "xno" && test "x$withval" != "x"; then
810
811
812
813
         ALT_openssl_WITHVAL="$withval"
      fi
  ])

814
AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
815
TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
816
817
818
819
820
821
822
823
824
825
826
827
    [#include <openssl/ssl.h>
     char *getenv(const char *);],
    [struct ssl_cipher_st;
     unsigned SSL_CIPHER_get_id(const struct ssl_cipher_st *);
     char *getenv(const char *);],
    dnl This funny-looking test program calls getenv, so that the compiler
    dnl will neither make code that call SSL_CIPHER_get_id(NULL) [producing
    dnl a crash], nor optimize out the call to SSL_CIPHER_get_id().
    dnl We look for SSL_cipher_get_id() because it is present in
    dnl OpenSSL >=1.0.1, because it is not deprecated, and because Tor
    dnl depends on it.
    [if (getenv("THIS_SHOULDNT_BE_SET_X201803")) SSL_CIPHER_get_id((void *)0);], [],
828
    [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
829

830
831
dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()

832
833
834
835
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
836
     TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
837
838
   fi
else
839
     TOR_OPENSSL_LIBS="-lssl -lcrypto"
840
841
842
fi
AC_SUBST(TOR_OPENSSL_LIBS)

843
844
845
846
847
848
849
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"
850

851
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
852
#include <openssl/opensslv.h>
853
#if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
854
855
#error "too old"
#endif
856
   ]], [[]])],
857
   [ : ],
858
   [ AC_MSG_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
859

860
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
861
862
863
864
865
866
867
868
#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
869
   ]], [[]])],
870
   [ : ],
871
   [ AC_MSG_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
872

873
874
875
876
AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
[#include <openssl/ssl.h>
])

877
878
879
880
881
AC_CHECK_FUNCS([ \
		SSL_SESSION_get_master_key \
		SSL_get_server_random \
                SSL_get_client_ciphers \
                SSL_get_client_random \
882
		SSL_CIPHER_find \
883
		TLS_method
884
	       ])
rl1987's avatar
rl1987 committed
885
886
887
888

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

889
890
891
892
893
dnl Check if OpenSSL structures are opaque
AC_CHECK_MEMBERS([SSL.state], , ,
[#include <openssl/ssl.h>
])

894
895
896
897
AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
#include <openssl/sha.h>
])

898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
dnl Define the set of checks for KIST scheduler support.
AC_DEFUN([CHECK_KIST_SUPPORT],[
  dnl KIST needs struct tcp_info and for certain members to exist.
  AC_CHECK_MEMBERS(
    [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
    , ,[[#include <netinet/tcp.h>]])
  dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
                     #include <linux/sockios.h>
                     #ifndef SIOCOUTQNSD
                     #error
                     #endif
                     ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  if test "x$have_siocoutqnsd" = "xyes"; then
    if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
      if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
        have_kist_support=yes
      fi
    fi
  fi
])
dnl Now, trigger the check.
CHECK_KIST_SUPPORT
AS_IF([test "x$have_kist_support" = "xyes"],
      [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
                                        on this system])],
      [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])

926
927
928
929
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

930
931
932
dnl ------------------------------------------------------
dnl Where do you live, zlib?  And how do we call you?

933
934
935
936
tor_zlib_pkg_redhat="zlib"
tor_zlib_pkg_debian="zlib1g"
tor_zlib_devpkg_redhat="zlib-devel"
tor_zlib_devpkg_debian="zlib1g-dev"
937
938
939
940

TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
    [#include <zlib.h>],
    [const char * zlibVersion(void);],
941
    [zlibVersion();], [--with-zlib-dir],
942
943
    [/opt/zlib])

944
945
946
947
948
949
950
951
952
953
954
955
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)

956
957
958
959
dnl ------------------------------------------------------
dnl Where we do we find lzma?

AC_ARG_ENABLE(lzma,
Taylor Yu's avatar
Taylor Yu committed
960
      AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
      [case "${enableval}" in
        "yes") lzma=true ;;
        "no")  lzma=false ;;
        * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
      esac], [lzma=auto])

if test "x$enable_lzma" = "xno"; then
    have_lzma=no;
else
    PKG_CHECK_MODULES([LZMA],
                      [liblzma],
                      have_lzma=yes,
                      have_lzma=no)

    if test "x$have_lzma" = "xno" ; then
        AC_MSG_WARN([Unable to find liblzma.])
    fi
fi

if test "x$have_lzma" = "xyes"; then
    AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
    TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
    TOR_LZMA_LIBS="${LZMA_LIBS}"
fi
AC_SUBST(TOR_LZMA_CFLAGS)
AC_SUBST(TOR_LZMA_LIBS)

988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
dnl ------------------------------------------------------
dnl Where we do we find zstd?

AC_ARG_ENABLE(zstd,
      AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
      [case "${enableval}" in
        "yes") zstd=true ;;
        "no")  zstd=false ;;
        * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
      esac], [zstd=auto])

if test "x$enable_zstd" = "xno"; then
    have_zstd=no;
else
    PKG_CHECK_MODULES([ZSTD],
Taylor Yu's avatar
Taylor Yu committed
1003
                      [libzstd >= 1.1],
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
                      have_zstd=yes,
                      have_zstd=no)

    if test "x$have_zstd" = "xno" ; then
        AC_MSG_WARN([Unable to find libzstd.])
    fi
fi

if test "x$have_zstd" = "xyes"; then
    AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
    TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
    TOR_ZSTD_LIBS="${ZSTD_LIBS}"
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025

    dnl now check for zstd functions
    save_LIBS="$LIBS"
    save_CFLAGS="$CFLAGS"
    LIBS="$LIBS $ZSTD_LIBS"
    CFLAGS="$CFLAGS $ZSTD_CFLAGS"
    AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
                   ZSTD_estimateDCtxSize)
    LIBS="$save_LIBS"
    CFLAGS="$save_CFLAGS"
1026
1027
1028
1029
fi
AC_SUBST(TOR_ZSTD_CFLAGS)
AC_SUBST(TOR_ZSTD_LIBS)

1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
dnl ----------------------------------------------------------------------
dnl Check if libcap is available for capabilities.

tor_cap_pkg_debian="libcap2"
tor_cap_pkg_redhat="libcap"
tor_cap_devpkg_debian="libcap-dev"
tor_cap_devpkg_redhat="libcap-devel"

AC_CHECK_LIB([cap], [cap_init], [],
  AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
)
AC_CHECK_FUNCS(cap_set_proc)

1043
1044
1045
1046
1047
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.
1048

1049
all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
1050
all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
1051

1052
1053
1054
1055
1056
CFLAGS_FTRAPV=
CFLAGS_FWRAPV=
CFLAGS_ASAN=
CFLAGS_UBSAN=

Nick Mathewson's avatar
Nick Mathewson committed
1057

1058
1059
1060
1061
1062
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
#if !defined(__clang__)
#error
#endif])], have_clang=yes, have_clang=no)

1063
if test "x$enable_gcc_hardening" != "xno"; then
1064
    CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
1065
    if test "x$have_clang" = "xyes"; then
1066
1067
        TOR_CHECK_CFLAGS(-Qunused-arguments)
    fi
1068
1069
1070
    TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
    AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
    AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
1071
m4_ifdef([AS_VAR_IF],[
1072
1073
1074
1075
    AS_VAR_IF(can_compile, [yes],
        AS_VAR_IF(can_link, [yes],
                  [],
                  AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
1076
        )])
1077
1078
    AS_VAR_POPDEF([can_link])
    AS_VAR_POPDEF([can_compile])
1079
1080
    TOR_CHECK_CFLAGS(-Wstack-protector)
    TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
Nick Mathewson's avatar
Nick Mathewson committed
1081
    if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
1082
1083
1084
       TOR_CHECK_CFLAGS(-fPIE)
       TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
    fi
1085
    TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
1086
fi
1087

1088
if test "$fragile_hardening" = "yes"; then
1089
1090
1091
1092
1093
    TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
   if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
      AC_MSG_WARN([The compiler supports -ftrapv, but for some reason I was not able to link with -ftrapv. Are you missing run-time support? Run-time hardening will not work as well as it should.])
   fi

1094
   if test "$tor_cv_cflags__ftrapv" != "yes"; then
1095
     AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
1096
1097
1098
1099
   fi

   TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
    if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
1100
      AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
1101
1102
1103
1104
    fi

   TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
    if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
1105
      AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
1106
1107
1108
    fi

TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
1109
1110
fi

1111
1112
1113
CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"

1114
mulodi_fixes_ftrapv=no
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
if test "$have_clang" = "yes"; then
  saved_CFLAGS="$CFLAGS"