configure.ac 77 KB

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  1. dnl Copyright (c) 2001-2004, Roger Dingledine
  2. dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
  3. dnl Copyright (c) 2007-2018, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_PREREQ([2.63])
  6. AC_INIT([tor],[0.4.0.0-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/app/main/tor_main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_USE_SYSTEM_EXTENSIONS
  16. AC_CANONICAL_HOST
  17. PKG_PROG_PKG_CONFIG
  18. AC_ARG_ENABLE(openbsd-malloc,
  19. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only. Deprecated: see --with-malloc]))
  20. AC_ARG_ENABLE(static-openssl,
  21. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  22. AC_ARG_ENABLE(static-libevent,
  23. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  24. AC_ARG_ENABLE(static-zlib,
  25. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  26. AC_ARG_ENABLE(static-tor,
  27. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  28. AC_ARG_ENABLE(unittests,
  29. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  30. AC_ARG_ENABLE(coverage,
  31. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  32. AC_ARG_ENABLE(asserts-in-tests,
  33. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  34. AC_ARG_ENABLE(system-torrc,
  35. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  36. AC_ARG_ENABLE(libfuzzer,
  37. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  38. AC_ARG_ENABLE(oss-fuzz,
  39. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  40. AC_ARG_ENABLE(memory-sentinels,
  41. AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
  42. AC_ARG_ENABLE(rust,
  43. AS_HELP_STRING(--enable-rust, [enable rust integration]))
  44. AC_ARG_ENABLE(cargo-online-mode,
  45. AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
  46. AC_ARG_ENABLE(restart-debugging,
  47. AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
  48. AC_ARG_ENABLE(zstd-advanced-apis,
  49. AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
  50. AC_ARG_ENABLE(nss,
  51. AS_HELP_STRING(--enable-nss, [Use Mozilla's NSS TLS library. (EXPERIMENTAL)]))
  52. AC_ARG_ENABLE(pic,
  53. AS_HELP_STRING(--enable-pic, [Build Tor's binaries as position-independent code, suitable to link as a library.]))
  54. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  55. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  56. fi
  57. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  58. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  59. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  60. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  61. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  62. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  63. AM_CONDITIONAL(USE_NSS, test "x$enable_nss" = "xyes")
  64. AM_CONDITIONAL(USE_OPENSSL, test "x$enable_nss" != "xyes")
  65. if test "x$enable_nss" = "xyes"; then
  66. AC_DEFINE(ENABLE_NSS, 1,
  67. [Defined if we're building with NSS.])
  68. else
  69. AC_DEFINE(ENABLE_OPENSSL, 1,
  70. [Defined if we're building with OpenSSL or LibreSSL])
  71. fi
  72. if test "$enable_static_tor" = "yes"; then
  73. enable_static_libevent="yes";
  74. enable_static_openssl="yes";
  75. enable_static_zlib="yes";
  76. CFLAGS="$CFLAGS -static"
  77. fi
  78. if test "$enable_system_torrc" = "no"; then
  79. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  80. [Defined if we're not going to look for a torrc in SYSCONF])
  81. fi
  82. if test "$enable_memory_sentinels" = "no"; then
  83. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  84. [Defined if we're turning off memory safety code to look for bugs])
  85. fi
  86. AC_ARG_ENABLE(asciidoc,
  87. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  88. [case "${enableval}" in
  89. "yes") asciidoc=true ;;
  90. "no") asciidoc=false ;;
  91. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  92. esac], [asciidoc=true])
  93. # systemd notify support
  94. AC_ARG_ENABLE(systemd,
  95. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  96. [case "${enableval}" in
  97. "yes") systemd=true ;;
  98. "no") systemd=false ;;
  99. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  100. esac], [systemd=auto])
  101. if test "$enable_restart_debugging" = "yes"; then
  102. AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
  103. [Defined if we're building with support for in-process restart debugging.])
  104. fi
  105. if test "$enable_zstd_advanced_apis" != "no"; then
  106. AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
  107. [Defined if we're going to try to use zstd's "static-only" APIs.])
  108. fi
  109. # systemd support
  110. if test "x$enable_systemd" = "xno"; then
  111. have_systemd=no;
  112. else
  113. PKG_CHECK_MODULES(SYSTEMD,
  114. [libsystemd-daemon],
  115. have_systemd=yes,
  116. have_systemd=no)
  117. if test "x$have_systemd" = "xno"; then
  118. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  119. PKG_CHECK_MODULES(SYSTEMD,
  120. [libsystemd],
  121. have_systemd=yes,
  122. have_systemd=no)
  123. fi
  124. fi
  125. if test "x$have_systemd" = "xyes"; then
  126. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  127. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  128. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  129. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  130. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  131. fi
  132. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  133. AC_SUBST(TOR_SYSTEMD_LIBS)
  134. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  135. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  136. fi
  137. case "$host" in
  138. *-*-solaris* )
  139. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  140. ;;
  141. esac
  142. AC_ARG_ENABLE(gcc-warnings,
  143. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  144. AC_ARG_ENABLE(fatal-warnings,
  145. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  146. AC_ARG_ENABLE(gcc-warnings-advisory,
  147. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  148. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  149. AC_ARG_ENABLE(gcc-hardening,
  150. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  151. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  152. AC_ARG_ENABLE(expensive-hardening,
  153. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  154. AC_ARG_ENABLE(fragile-hardening,
  155. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  156. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  157. fragile_hardening="yes"
  158. AC_DEFINE(DEBUG_SMARTLIST, 1, [Enable smartlist debugging])
  159. fi
  160. dnl Linker hardening options
  161. dnl Currently these options are ELF specific - you can't use this with MacOSX
  162. AC_ARG_ENABLE(linker-hardening,
  163. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  164. AC_ARG_ENABLE(local-appdata,
  165. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  166. if test "$enable_local_appdata" = "yes"; then
  167. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  168. [Defined if we default to host local appdata paths on Windows])
  169. fi
  170. AC_ARG_ENABLE(tool-name-check,
  171. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  172. AC_ARG_ENABLE(seccomp,
  173. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  174. AC_ARG_ENABLE(libscrypt,
  175. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  176. dnl Enable event tracing which are transformed to debug log statement.
  177. AC_ARG_ENABLE(event-tracing-debug,
  178. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  179. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  180. if test x$enable_event_tracing_debug = xyes; then
  181. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  182. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  183. fi
  184. dnl Enable Android only features.
  185. AC_ARG_ENABLE(android,
  186. AS_HELP_STRING(--enable-android, [build with Android features enabled]))
  187. AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
  188. if test "x$enable_android" = "xyes"; then
  189. AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
  190. dnl Check if the Android log library is available.
  191. AC_CHECK_HEADERS([android/log.h])
  192. AC_SEARCH_LIBS(__android_log_write, [log])
  193. fi
  194. dnl ---
  195. dnl Tor modules options. These options are namespaced with --disable-module-XXX
  196. dnl ---
  197. dnl All our modules.
  198. m4_define(MODULES, dirauth)
  199. dnl Directory Authority module.
  200. AC_ARG_ENABLE([module-dirauth],
  201. AS_HELP_STRING([--disable-module-dirauth],
  202. [Do not build tor with the dirauth module]),
  203. [], dnl Action if-given
  204. AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
  205. [Compile with Directory Authority feature support]))
  206. AM_CONDITIONAL(BUILD_MODULE_DIRAUTH, [test "x$enable_module_dirauth" != "xno"])
  207. dnl Helper variables.
  208. TOR_MODULES_ALL_ENABLED=
  209. AC_DEFUN([ADD_MODULE], [
  210. MODULE=m4_toupper($1)
  211. TOR_MODULES_ALL_ENABLED="${TOR_MODULES_ALL_ENABLED} -DHAVE_MODULE_${MODULE}=1"
  212. ])
  213. m4_foreach_w([module], MODULES, [ADD_MODULE([module])])
  214. AC_SUBST(TOR_MODULES_ALL_ENABLED)
  215. dnl check for the correct "ar" when cross-compiling.
  216. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  217. dnl so kludge up a replacement for the case where it isn't there yet.)
  218. m4_ifdef([AM_PROG_AR],
  219. [AM_PROG_AR],
  220. [AN_MAKEVAR([AR], [AC_PROG_AR])
  221. AN_PROGRAM([ar], [AC_PROG_AR])
  222. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  223. AC_PROG_AR])
  224. dnl Check whether the above macro has settled for a simply named tool even
  225. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  226. dnl because that will find any cc on the system, not only the cross-compiler,
  227. dnl and then verify that a binary built with this compiler runs on the
  228. dnl build system. It will then come to the false conclusion that we're not
  229. dnl cross-compiling.
  230. if test "x$enable_tool_name_check" != "xno"; then
  231. if test "x$ac_tool_warned" = "xyes"; then
  232. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  233. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  234. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  235. fi
  236. fi
  237. AC_PROG_CC
  238. AC_PROG_CPP
  239. AC_PROG_MAKE_SET
  240. AC_PROG_RANLIB
  241. AC_PROG_SED
  242. AC_ARG_VAR([PERL], [path to Perl binary])
  243. AC_CHECK_PROGS([PERL], [perl])
  244. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  245. dnl check for asciidoc and a2x
  246. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  247. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  248. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  249. AM_PROG_CC_C_O
  250. AC_PROG_CC_C99
  251. AC_ARG_VAR([PYTHON], [path to Python binary])
  252. AC_CHECK_PROGS(PYTHON, [ \
  253. python3 \
  254. python3.8 python3.7 python3.6 python3.5 python3.4 \
  255. python \
  256. python2 python2.7])
  257. if test "x$PYTHON" = "x"; then
  258. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  259. fi
  260. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  261. dnl List all external rust crates we depend on here. Include the version
  262. rust_crates=" \
  263. digest-0.7.2 \
  264. libc-0.2.39 \
  265. "
  266. AC_SUBST(rust_crates)
  267. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  268. AC_C_FLEXIBLE_ARRAY_MEMBER
  269. ], [
  270. dnl Maybe we've got an old autoconf...
  271. AC_CACHE_CHECK([for flexible array members],
  272. tor_cv_c_flexarray,
  273. [AC_COMPILE_IFELSE(
  274. AC_LANG_PROGRAM([
  275. struct abc { int a; char b[]; };
  276. ], [
  277. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  278. def->b[0] = 33;
  279. ]),
  280. [tor_cv_c_flexarray=yes],
  281. [tor_cv_c_flexarray=no])])
  282. if test "$tor_cv_flexarray" = "yes"; then
  283. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  284. else
  285. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  286. fi
  287. ])
  288. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  289. tor_cv_c_c99_decl,
  290. [AC_COMPILE_IFELSE(
  291. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  292. [tor_cv_c_c99_decl=yes],
  293. [tor_cv_c_c99_decl=no] )])
  294. if test "$tor_cv_c_c99_decl" != "yes"; then
  295. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  296. fi
  297. AC_CACHE_CHECK([for working C99 designated initializers],
  298. tor_cv_c_c99_designated_init,
  299. [AC_COMPILE_IFELSE(
  300. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  301. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  302. [tor_cv_c_c99_designated_init=yes],
  303. [tor_cv_c_c99_designated_init=no] )])
  304. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  305. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  306. fi
  307. TORUSER=_tor
  308. AC_ARG_WITH(tor-user,
  309. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  310. [
  311. TORUSER=$withval
  312. ]
  313. )
  314. AC_SUBST(TORUSER)
  315. TORGROUP=_tor
  316. AC_ARG_WITH(tor-group,
  317. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  318. [
  319. TORGROUP=$withval
  320. ]
  321. )
  322. AC_SUBST(TORGROUP)
  323. dnl If _WIN32 is defined and non-zero, we are building for win32
  324. AC_MSG_CHECKING([for win32])
  325. AC_RUN_IFELSE([AC_LANG_SOURCE([
  326. int main(int c, char **v) {
  327. #ifdef _WIN32
  328. #if _WIN32
  329. return 0;
  330. #else
  331. return 1;
  332. #endif
  333. #else
  334. return 2;
  335. #endif
  336. }])],
  337. bwin32=true; AC_MSG_RESULT([yes]),
  338. bwin32=false; AC_MSG_RESULT([no]),
  339. bwin32=cross; AC_MSG_RESULT([cross])
  340. )
  341. if test "$bwin32" = "cross"; then
  342. AC_MSG_CHECKING([for win32 (cross)])
  343. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  344. #ifdef _WIN32
  345. int main(int c, char **v) {return 0;}
  346. #else
  347. #error
  348. int main(int c, char **v) {return x(y);}
  349. #endif
  350. ])],
  351. bwin32=true; AC_MSG_RESULT([yes]),
  352. bwin32=false; AC_MSG_RESULT([no]))
  353. fi
  354. AH_BOTTOM([
  355. #ifdef _WIN32
  356. /* Defined to access windows functions and definitions for >=WinXP */
  357. # ifndef WINVER
  358. # define WINVER 0x0501
  359. # endif
  360. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  361. # ifndef _WIN32_WINNT
  362. # define _WIN32_WINNT 0x0501
  363. # endif
  364. /* Defined to avoid including some windows headers as part of Windows.h */
  365. # ifndef WIN32_LEAN_AND_MEAN
  366. # define WIN32_LEAN_AND_MEAN 1
  367. # endif
  368. #endif
  369. ])
  370. AM_CONDITIONAL(WIN32, test "x$bwin32" = "xtrue")
  371. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  372. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  373. dnl Enable C99 when compiling with MIPSpro
  374. AC_MSG_CHECKING([for MIPSpro compiler])
  375. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  376. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  377. #error
  378. return x(y);
  379. #endif
  380. ])],
  381. bmipspro=false; AC_MSG_RESULT(no),
  382. bmipspro=true; AC_MSG_RESULT(yes))
  383. if test "$bmipspro" = "true"; then
  384. CFLAGS="$CFLAGS -c99"
  385. fi
  386. AC_C_BIGENDIAN
  387. AC_ARG_VAR([TOR_RUST_TARGET], [Rust target, must be specified when cross-compiling (HOST != BUILD). example: i686-pc-windows-gnu])
  388. if test "x$enable_rust" = "xyes"; then
  389. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  390. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  391. if test "x$RUSTC" = "xno"; then
  392. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  393. fi
  394. AC_ARG_VAR([CARGO], [path to the cargo binary])
  395. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  396. if test "x$CARGO" = "xno"; then
  397. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  398. fi
  399. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  400. if test "x$enable_fatal_warnings" = "xyes"; then
  401. RUST_WARN=
  402. else
  403. RUST_WARN=#
  404. fi
  405. if test "x$enable_cargo_online_mode" = "xyes"; then
  406. CARGO_ONLINE=
  407. RUST_DL=#
  408. else
  409. CARGO_ONLINE=--frozen
  410. RUST_DL=
  411. dnl When we're not allowed to touch the network, we need crate dependencies
  412. dnl locally available.
  413. AC_MSG_CHECKING([rust crate dependencies])
  414. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  415. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  416. TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
  417. fi
  418. dnl Check whether the path exists before we try to cd into it.
  419. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  420. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  421. ERRORED=1
  422. fi
  423. dnl Make the path absolute, since we'll be using it from within a
  424. dnl subdirectory.
  425. TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
  426. for dep in $rust_crates; do
  427. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  428. 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.])
  429. ERRORED=1
  430. fi
  431. done
  432. if test "x$ERRORED" = "x"; then
  433. AC_MSG_RESULT([yes])
  434. fi
  435. fi
  436. dnl This is a workaround for #46797
  437. dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ). Once the
  438. dnl upstream bug is fixed, we can remove this workaround.
  439. case "$host_os" in
  440. darwin*)
  441. TOR_RUST_EXTRA_LIBS="-lresolv"
  442. ;;
  443. esac
  444. dnl For now both MSVC and MinGW rust libraries will output static libs with
  445. dnl the MSVC naming convention.
  446. if test "$bwin32" = "true"; then
  447. tor_rust_static_name=tor_rust.lib
  448. else
  449. tor_rust_static_name=libtor_rust.a
  450. fi
  451. AC_CANONICAL_BUILD
  452. if test -n "$TOR_RUST_TARGET"; then
  453. if test "$host" = "$build"; then
  454. AC_MSG_ERROR([HOST = BUILD is invalid if TOR_RUST_TARGET is specified, see configure --help for more information.])
  455. fi
  456. RUST_TARGET_PROP="target = '$TOR_RUST_TARGET'"
  457. TOR_RUST_LIB_PATH="src/rust/target/$TOR_RUST_TARGET/release/$tor_rust_static_name"
  458. else
  459. if test "$host" != "$build"; then
  460. AC_MSG_ERROR([TOR_RUST_TARGET must be specified when cross-compiling with Rust enabled.])
  461. fi
  462. RUST_TARGET_PROP=
  463. TOR_RUST_LIB_PATH="src/rust/target/release/$tor_rust_static_name"
  464. fi
  465. AC_SUBST(RUST_TARGET_PROP)
  466. AC_SUBST(TOR_RUST_LIB_PATH)
  467. AC_SUBST(CARGO_ONLINE)
  468. AC_SUBST(RUST_WARN)
  469. AC_SUBST(RUST_DL)
  470. dnl Let's check the rustc version, too
  471. AC_MSG_CHECKING([rust version])
  472. RUSTC_VERSION=`$RUSTC --version`
  473. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  474. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  475. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  476. AC_MSG_ERROR([rustc version couldn't be identified])
  477. fi
  478. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  479. AC_MSG_ERROR([rustc must be at least version 1.14])
  480. fi
  481. AC_MSG_RESULT([$RUSTC_VERSION])
  482. fi
  483. AC_SUBST(TOR_RUST_EXTRA_LIBS)
  484. AC_SEARCH_LIBS(socket, [socket network])
  485. AC_SEARCH_LIBS(gethostbyname, [nsl])
  486. AC_SEARCH_LIBS(dlopen, [dl])
  487. AC_SEARCH_LIBS(inet_aton, [resolv])
  488. AC_SEARCH_LIBS(backtrace, [execinfo])
  489. saved_LIBS="$LIBS"
  490. AC_SEARCH_LIBS([clock_gettime], [rt])
  491. if test "$LIBS" != "$saved_LIBS"; then
  492. # Looks like we need -lrt for clock_gettime().
  493. have_rt=yes
  494. fi
  495. if test "$bwin32" = "false"; then
  496. AC_SEARCH_LIBS(pthread_create, [pthread])
  497. AC_SEARCH_LIBS(pthread_detach, [pthread])
  498. fi
  499. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  500. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  501. AC_CHECK_FUNCS(
  502. _NSGetEnviron \
  503. RtlSecureZeroMemory \
  504. SecureZeroMemory \
  505. accept4 \
  506. backtrace \
  507. backtrace_symbols_fd \
  508. eventfd \
  509. explicit_bzero \
  510. timingsafe_memcmp \
  511. flock \
  512. ftime \
  513. get_current_dir_name \
  514. getaddrinfo \
  515. getdelim \
  516. getifaddrs \
  517. getline \
  518. getpass \
  519. getrlimit \
  520. gettimeofday \
  521. gmtime_r \
  522. gnu_get_libc_version \
  523. htonll \
  524. inet_aton \
  525. ioctl \
  526. issetugid \
  527. llround \
  528. localtime_r \
  529. lround \
  530. memmem \
  531. memset_s \
  532. mmap \
  533. pipe \
  534. pipe2 \
  535. prctl \
  536. readpassphrase \
  537. rint \
  538. sigaction \
  539. socketpair \
  540. statvfs \
  541. strncasecmp \
  542. strcasecmp \
  543. strlcat \
  544. strlcpy \
  545. strnlen \
  546. strptime \
  547. strtok_r \
  548. strtoull \
  549. sysconf \
  550. sysctl \
  551. truncate \
  552. uname \
  553. usleep \
  554. vasprintf \
  555. _vscprintf
  556. )
  557. # Apple messed up when they added some functions: they
  558. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  559. # checks.
  560. # We should only probe for these functions if we are sure that we
  561. # are not targeting OS X 10.9 or earlier.
  562. AC_MSG_CHECKING([for a pre-Yosemite OS X build target])
  563. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  564. #ifdef __APPLE__
  565. # include <AvailabilityMacros.h>
  566. # ifndef MAC_OS_X_VERSION_10_10
  567. # define MAC_OS_X_VERSION_10_10 101000
  568. # endif
  569. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  570. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
  571. # error "Running on Mac OS X 10.9 or earlier"
  572. # endif
  573. # endif
  574. #endif
  575. ]], [[]])],
  576. [on_macos_pre_10_10=no ; AC_MSG_RESULT([no])],
  577. [on_macos_pre_10_10=yes; AC_MSG_RESULT([yes])])
  578. if test "$on_macos_pre_10_10" = "no"; then
  579. AC_CHECK_FUNCS(
  580. mach_approximate_time \
  581. )
  582. fi
  583. # We should only probe for these functions if we are sure that we
  584. # are not targeting OSX 10.11 or earlier.
  585. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  586. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  587. #ifdef __APPLE__
  588. # include <AvailabilityMacros.h>
  589. # ifndef MAC_OS_X_VERSION_10_12
  590. # define MAC_OS_X_VERSION_10_12 101200
  591. # endif
  592. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  593. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  594. # error "Running on Mac OSX 10.11 or earlier"
  595. # endif
  596. # endif
  597. #endif
  598. ]], [[]])],
  599. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  600. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  601. if test "$on_macos_pre_10_12" = "no"; then
  602. AC_CHECK_FUNCS(
  603. clock_gettime \
  604. getentropy \
  605. )
  606. fi
  607. if test "$bwin32" != "true"; then
  608. AC_CHECK_HEADERS(pthread.h)
  609. AC_CHECK_FUNCS(pthread_create)
  610. AC_CHECK_FUNCS(pthread_condattr_setclock)
  611. fi
  612. if test "$bwin32" = "true"; then
  613. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  614. #include <windows.h>
  615. #include <conio.h>
  616. #include <wchar.h>
  617. ])
  618. fi
  619. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  620. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  621. AC_MSG_CHECKING([whether free(NULL) works])
  622. AC_RUN_IFELSE([AC_LANG_PROGRAM([
  623. #include <stdlib.h>
  624. ], [
  625. char *p = NULL;
  626. free(p);
  627. ])],
  628. [free_null_ok=true; AC_MSG_RESULT(yes)],
  629. [free_null_ok=false; AC_MSG_RESULT(no)],
  630. [free_null_ok=cross; AC_MSG_RESULT(cross)])
  631. if test "$free_null_ok" = "false"; then
  632. AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
  633. fi
  634. dnl ------------------------------------------------------
  635. dnl Where do you live, libevent? And how do we call you?
  636. if test "$bwin32" = "true"; then
  637. TOR_LIB_WS32=-lws2_32
  638. TOR_LIB_IPHLPAPI=-liphlpapi
  639. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  640. # think it's actually necessary.
  641. TOR_LIB_GDI=-lgdi32
  642. TOR_LIB_USERENV=-luserenv
  643. else
  644. TOR_LIB_WS32=
  645. TOR_LIB_GDI=
  646. TOR_LIB_USERENV=
  647. fi
  648. AC_SUBST(TOR_LIB_WS32)
  649. AC_SUBST(TOR_LIB_GDI)
  650. AC_SUBST(TOR_LIB_IPHLPAPI)
  651. AC_SUBST(TOR_LIB_USERENV)
  652. tor_libevent_pkg_redhat="libevent"
  653. tor_libevent_pkg_debian="libevent-dev"
  654. tor_libevent_devpkg_redhat="libevent-devel"
  655. tor_libevent_devpkg_debian="libevent-dev"
  656. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  657. dnl linking for static builds.
  658. STATIC_LIBEVENT_FLAGS=""
  659. if test "$enable_static_libevent" = "yes"; then
  660. if test "$have_rt" = "yes"; then
  661. STATIC_LIBEVENT_FLAGS=" -lrt "
  662. fi
  663. fi
  664. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  665. #ifdef _WIN32
  666. #include <winsock2.h>
  667. #endif
  668. #include <sys/time.h>
  669. #include <sys/types.h>
  670. #include <event2/event.h>], [
  671. #ifdef _WIN32
  672. #include <winsock2.h>
  673. #endif
  674. struct event_base;
  675. struct event_base *event_base_new(void);
  676. void event_base_free(struct event_base *);],
  677. [
  678. #ifdef _WIN32
  679. {WSADATA d; WSAStartup(0x101,&d); }
  680. #endif
  681. event_base_free(event_base_new());
  682. ], [--with-libevent-dir], [/opt/libevent])
  683. dnl Determine the incantation needed to link libevent.
  684. save_LIBS="$LIBS"
  685. save_LDFLAGS="$LDFLAGS"
  686. save_CPPFLAGS="$CPPFLAGS"
  687. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  688. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  689. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  690. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  691. if test "$enable_static_libevent" = "yes"; then
  692. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  693. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  694. else
  695. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  696. fi
  697. else
  698. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  699. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  700. 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"))
  701. if test "$ac_cv_search_event_new" != "none required"; then
  702. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  703. fi
  704. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  705. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  706. fi
  707. else
  708. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  709. fi
  710. fi
  711. dnl Now check for particular libevent functions.
  712. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  713. evutil_secure_rng_add_bytes \
  714. evdns_base_get_nameserver_addr \
  715. ])
  716. LIBS="$save_LIBS"
  717. LDFLAGS="$save_LDFLAGS"
  718. CPPFLAGS="$save_CPPFLAGS"
  719. dnl Check that libevent is at least at version 2.0.10, the first stable
  720. dnl release of its series
  721. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  722. AC_MSG_CHECKING([whether Libevent is new enough])
  723. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  724. #include <event2/event.h>
  725. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  726. #error
  727. int x = y(zz);
  728. #else
  729. int x = 1;
  730. #endif
  731. ])], [ AC_MSG_RESULT([yes]) ],
  732. [ AC_MSG_RESULT([no])
  733. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  734. LIBS="$save_LIBS"
  735. LDFLAGS="$save_LDFLAGS"
  736. CPPFLAGS="$save_CPPFLAGS"
  737. AC_SUBST(TOR_LIBEVENT_LIBS)
  738. dnl ------------------------------------------------------
  739. dnl Where do you live, libm?
  740. dnl On some platforms (Haiku/BeOS) the math library is
  741. dnl part of libroot. In which case don't link against lm
  742. TOR_LIB_MATH=""
  743. save_LIBS="$LIBS"
  744. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  745. if test "$ac_cv_search_pow" != "none required"; then
  746. TOR_LIB_MATH="$ac_cv_search_pow"
  747. fi
  748. LIBS="$save_LIBS"
  749. AC_SUBST(TOR_LIB_MATH)
  750. dnl ------------------------------------------------------
  751. dnl Hello, NSS. You're new around here.
  752. if test "x$enable_nss" = "xyes"; then
  753. PKG_CHECK_MODULES(NSS,
  754. [nss],
  755. [have_nss=yes],
  756. [have_nss=no; AC_MSG_ERROR([You asked for NSS but I can't find it.])])
  757. AC_SUBST(NSS_CFLAGS)
  758. AC_SUBST(NSS_LIBS)
  759. fi
  760. dnl ------------------------------------------------------
  761. dnl Where do you live, openssl? And how do we call you?
  762. if test "x$enable_nss" != "xyes"; then
  763. tor_openssl_pkg_redhat="openssl"
  764. tor_openssl_pkg_debian="libssl-dev"
  765. tor_openssl_devpkg_redhat="openssl-devel"
  766. tor_openssl_devpkg_debian="libssl-dev"
  767. ALT_openssl_WITHVAL=""
  768. AC_ARG_WITH(ssl-dir,
  769. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  770. [
  771. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  772. ALT_openssl_WITHVAL="$withval"
  773. fi
  774. ])
  775. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  776. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  777. [#include <openssl/ssl.h>
  778. char *getenv(const char *);],
  779. [struct ssl_cipher_st;
  780. unsigned SSL_CIPHER_get_id(const struct ssl_cipher_st *);
  781. char *getenv(const char *);],
  782. dnl This funny-looking test program calls getenv, so that the compiler
  783. dnl will neither make code that call SSL_CIPHER_get_id(NULL) [producing
  784. dnl a crash], nor optimize out the call to SSL_CIPHER_get_id().
  785. dnl We look for SSL_cipher_get_id() because it is present in
  786. dnl OpenSSL >=1.0.1, because it is not deprecated, and because Tor
  787. dnl depends on it.
  788. [if (getenv("THIS_SHOULDNT_BE_SET_X201803")) SSL_CIPHER_get_id((void *)0);], [],
  789. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  790. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  791. if test "$enable_static_openssl" = "yes"; then
  792. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  793. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  794. else
  795. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  796. fi
  797. else
  798. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  799. fi
  800. AC_SUBST(TOR_OPENSSL_LIBS)
  801. dnl Now check for particular openssl functions.
  802. save_LIBS="$LIBS"
  803. save_LDFLAGS="$LDFLAGS"
  804. save_CPPFLAGS="$CPPFLAGS"
  805. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  806. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  807. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  808. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  809. #include <openssl/opensslv.h>
  810. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  811. #error "too old"
  812. #endif
  813. ]], [[]])],
  814. [ : ],
  815. [ 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.]) ])
  816. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  817. #include <openssl/opensslv.h>
  818. #include <openssl/evp.h>
  819. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  820. #error "no ECC"
  821. #endif
  822. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  823. #error "curves unavailable"
  824. #endif
  825. ]], [[]])],
  826. [ : ],
  827. [ 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.]) ])
  828. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  829. [#include <openssl/ssl.h>
  830. ])
  831. AC_CHECK_FUNCS([ \
  832. ERR_load_KDF_strings \
  833. SSL_SESSION_get_master_key \
  834. SSL_get_server_random \
  835. SSL_get_client_ciphers \
  836. SSL_get_client_random \
  837. SSL_CTX_set1_groups_list \
  838. SSL_CIPHER_find \
  839. SSL_CTX_set_security_level \
  840. TLS_method
  841. ])
  842. dnl Check if OpenSSL has scrypt implementation.
  843. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  844. dnl Check if OpenSSL structures are opaque
  845. AC_CHECK_MEMBERS([SSL.state], , ,
  846. [#include <openssl/ssl.h>
  847. ])
  848. AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
  849. #include <openssl/sha.h>
  850. ])
  851. fi # enable_nss
  852. dnl ======================================================================
  853. dnl Can we use KIST?
  854. dnl Define the set of checks for KIST scheduler support.
  855. AC_DEFUN([CHECK_KIST_SUPPORT],[
  856. dnl KIST needs struct tcp_info and for certain members to exist.
  857. AC_CHECK_MEMBERS(
  858. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  859. , ,[[#include <netinet/tcp.h>]])
  860. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  861. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  862. #include <linux/sockios.h>
  863. #ifndef SIOCOUTQNSD
  864. #error
  865. #endif
  866. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  867. if test "x$have_siocoutqnsd" = "xyes"; then
  868. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  869. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  870. have_kist_support=yes
  871. fi
  872. fi
  873. fi
  874. ])
  875. dnl Now, trigger the check.
  876. CHECK_KIST_SUPPORT
  877. AS_IF([test "x$have_kist_support" = "xyes"],
  878. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  879. on this system])],
  880. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  881. LIBS="$save_LIBS"
  882. LDFLAGS="$save_LDFLAGS"
  883. CPPFLAGS="$save_CPPFLAGS"
  884. dnl ------------------------------------------------------
  885. dnl Where do you live, zlib? And how do we call you?
  886. tor_zlib_pkg_redhat="zlib"
  887. tor_zlib_pkg_debian="zlib1g"
  888. tor_zlib_devpkg_redhat="zlib-devel"
  889. tor_zlib_devpkg_debian="zlib1g-dev"
  890. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  891. [#include <zlib.h>],
  892. [const char * zlibVersion(void);],
  893. [zlibVersion();], [--with-zlib-dir],
  894. [/opt/zlib])
  895. if test "$enable_static_zlib" = "yes"; then
  896. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  897. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  898. using --enable-static-zlib")
  899. else
  900. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  901. fi
  902. else
  903. TOR_ZLIB_LIBS="-lz"
  904. fi
  905. AC_SUBST(TOR_ZLIB_LIBS)
  906. dnl ------------------------------------------------------
  907. dnl Where we do we find lzma?
  908. AC_ARG_ENABLE(lzma,
  909. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  910. [case "${enableval}" in
  911. "yes") lzma=true ;;
  912. "no") lzma=false ;;
  913. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  914. esac], [lzma=auto])
  915. if test "x$enable_lzma" = "xno"; then
  916. have_lzma=no;
  917. else
  918. PKG_CHECK_MODULES([LZMA],
  919. [liblzma],
  920. have_lzma=yes,
  921. have_lzma=no)
  922. if test "x$have_lzma" = "xno" ; then
  923. AC_MSG_WARN([Unable to find liblzma.])
  924. fi
  925. fi
  926. if test "x$have_lzma" = "xyes"; then
  927. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  928. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  929. TOR_LZMA_LIBS="${LZMA_LIBS}"
  930. fi
  931. AC_SUBST(TOR_LZMA_CFLAGS)
  932. AC_SUBST(TOR_LZMA_LIBS)
  933. dnl ------------------------------------------------------
  934. dnl Where we do we find zstd?
  935. AC_ARG_ENABLE(zstd,
  936. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  937. [case "${enableval}" in
  938. "yes") zstd=true ;;
  939. "no") zstd=false ;;
  940. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  941. esac], [zstd=auto])
  942. if test "x$enable_zstd" = "xno"; then
  943. have_zstd=no;
  944. else
  945. PKG_CHECK_MODULES([ZSTD],
  946. [libzstd >= 1.1],
  947. have_zstd=yes,
  948. have_zstd=no)
  949. if test "x$have_zstd" = "xno" ; then
  950. AC_MSG_WARN([Unable to find libzstd.])
  951. fi
  952. fi
  953. if test "x$have_zstd" = "xyes"; then
  954. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  955. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  956. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  957. dnl now check for zstd functions
  958. save_LIBS="$LIBS"
  959. save_CFLAGS="$CFLAGS"
  960. LIBS="$LIBS $ZSTD_LIBS"
  961. CFLAGS="$CFLAGS $ZSTD_CFLAGS"
  962. AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
  963. ZSTD_estimateDCtxSize)
  964. LIBS="$save_LIBS"
  965. CFLAGS="$save_CFLAGS"
  966. fi
  967. AC_SUBST(TOR_ZSTD_CFLAGS)
  968. AC_SUBST(TOR_ZSTD_LIBS)
  969. dnl ----------------------------------------------------------------------
  970. dnl Check if libcap is available for capabilities.
  971. tor_cap_pkg_debian="libcap2"
  972. tor_cap_pkg_redhat="libcap"
  973. tor_cap_devpkg_debian="libcap-dev"
  974. tor_cap_devpkg_redhat="libcap-devel"
  975. AC_CHECK_LIB([cap], [cap_init], [],
  976. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  977. )
  978. AC_CHECK_FUNCS(cap_set_proc)
  979. dnl ---------------------------------------------------------------------
  980. dnl Now that we know about our major libraries, we can check for compiler
  981. dnl and linker hardening options. We need to do this with the libraries known,
  982. dnl since sometimes the linker will like an option but not be willing to
  983. dnl use it with a build of a library.
  984. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  985. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  986. CFLAGS_FTRAPV=
  987. CFLAGS_FWRAPV=
  988. CFLAGS_ASAN=
  989. CFLAGS_UBSAN=
  990. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  991. #if !defined(__clang__)
  992. #error
  993. #endif])], have_clang=yes, have_clang=no)
  994. if test "x$enable_pic" = "xyes"; then
  995. TOR_CHECK_CFLAGS(-fPIC)
  996. fi
  997. if test "x$enable_gcc_hardening" != "xno"; then
  998. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  999. if test "x$have_clang" = "xyes"; then
  1000. TOR_CHECK_CFLAGS(-Qunused-arguments)
  1001. fi
  1002. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  1003. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  1004. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  1005. m4_ifdef([AS_VAR_IF],[
  1006. AS_VAR_IF(can_compile, [yes],
  1007. AS_VAR_IF(can_link, [yes],
  1008. [],
  1009. AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
  1010. )])
  1011. AS_VAR_POPDEF([can_link])
  1012. AS_VAR_POPDEF([can_compile])
  1013. TOR_CHECK_CFLAGS(-Wstack-protector)
  1014. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  1015. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  1016. if test "$enable_pic" != "yes"; then
  1017. # If we have already enabled -fPIC, then we don't also need to
  1018. # compile with -fPIE...
  1019. TOR_CHECK_CFLAGS(-fPIE)
  1020. fi
  1021. # ... but we want to link our executables with -pie in any case, since
  1022. # they're executables, not a library.
  1023. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  1024. fi
  1025. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  1026. fi
  1027. if test "$fragile_hardening" = "yes"; then
  1028. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  1029. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  1030. 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.])
  1031. fi
  1032. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  1033. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  1034. fi
  1035. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  1036. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1037. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  1038. fi
  1039. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  1040. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1041. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  1042. fi
  1043. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  1044. fi
  1045. dnl Find the correct libraries to add in order to use the sanitizers.
  1046. dnl
  1047. dnl When building Rust, Cargo will run the linker with the -nodefaultlibs
  1048. dnl option, which will prevent the compiler from linking the sanitizer
  1049. dnl libraries it needs. We need to specify them manually.
  1050. dnl
  1051. dnl What's more, we need to specify them in a linker script rather than
  1052. dnl from build.rs: these options aren't allowed in the cargo:rustc-flags
  1053. dnl variable.
  1054. RUST_LINKER_OPTIONS=""
  1055. if test "x$have_clang" = "xyes"; then
  1056. if test "x$CFLAGS_ASAN" != "x"; then
  1057. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_ASAN -Cdefault-linker-libraries"
  1058. fi
  1059. if test "x$CFLAGS_UBSAN" != "x"; then
  1060. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_UBSAN -Cdefault-linker-libraries"
  1061. fi
  1062. else
  1063. if test "x$CFLAGS_ASAN" != "x"; then
  1064. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=address -Cdefault-linker-libraries"
  1065. fi
  1066. if test "x$CFLAGS_UBSAN" != "x"; then
  1067. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=undefined -Cdefault-linker-libraries"
  1068. fi
  1069. fi
  1070. AC_SUBST(RUST_LINKER_OPTIONS)
  1071. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  1072. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  1073. mulodi_fixes_ftrapv=no
  1074. if test "$have_clang" = "yes"; then
  1075. saved_CFLAGS="$CFLAGS"
  1076. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  1077. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  1078. AC_LINK_IFELSE([
  1079. AC_LANG_SOURCE([[
  1080. #include <stdint.h>
  1081. #include <stdlib.h>
  1082. int main(int argc, char **argv)
  1083. {
  1084. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1085. * (int64_t)atoi(argv[3]);
  1086. return x == 9;
  1087. } ]])],
  1088. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  1089. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  1090. if test "$ftrapv_can_link" = "no"; then
  1091. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  1092. AC_LINK_IFELSE([
  1093. AC_LANG_SOURCE([[
  1094. #include <stdint.h>
  1095. #include <stdlib.h>
  1096. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  1097. *overflow=0;
  1098. return a;
  1099. }
  1100. int main(int argc, char **argv)
  1101. {
  1102. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1103. * (int64_t)atoi(argv[3]);
  1104. return x == 9;
  1105. } ]])],
  1106. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  1107. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  1108. fi
  1109. CFLAGS="$saved_CFLAGS"
  1110. fi
  1111. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  1112. dnl These cflags add bunches of branches, and we haven't been able to
  1113. dnl persuade ourselves that they're suitable for code that needs to be
  1114. dnl constant time.
  1115. AC_SUBST(CFLAGS_BUGTRAP)
  1116. dnl These cflags are variant ones sutable for code that needs to be
  1117. dnl constant-time.
  1118. AC_SUBST(CFLAGS_CONSTTIME)
  1119. if test "x$enable_linker_hardening" != "xno"; then
  1120. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  1121. fi
  1122. # For backtrace support
  1123. TOR_CHECK_LDFLAGS(-rdynamic)
  1124. dnl ------------------------------------------------------
  1125. dnl Now see if we have a -fomit-frame-pointer compiler option.
  1126. saved_CFLAGS="$CFLAGS"
  1127. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  1128. F_OMIT_FRAME_POINTER=''
  1129. if test "$saved_CFLAGS" != "$CFLAGS"; then
  1130. if test "$fragile_hardening" = "yes"; then
  1131. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  1132. fi
  1133. fi
  1134. CFLAGS="$saved_CFLAGS"
  1135. AC_SUBST(F_OMIT_FRAME_POINTER)
  1136. dnl ------------------------------------------------------
  1137. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  1138. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  1139. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  1140. dnl code will work.
  1141. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  1142. dnl ============================================================
  1143. dnl Check for libseccomp
  1144. if test "x$enable_seccomp" != "xno"; then
  1145. AC_CHECK_HEADERS([seccomp.h])
  1146. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  1147. fi
  1148. dnl ============================================================
  1149. dnl Check for libscrypt
  1150. if test "x$enable_libscrypt" != "xno"; then
  1151. AC_CHECK_HEADERS([libscrypt.h])
  1152. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  1153. AC_CHECK_FUNCS([libscrypt_scrypt])
  1154. fi
  1155. dnl ============================================================
  1156. dnl We need an implementation of curve25519.
  1157. dnl set these defaults.
  1158. build_curve25519_donna=no
  1159. build_curve25519_donna_c64=no
  1160. use_curve25519_donna=no
  1161. use_curve25519_nacl=no
  1162. CURVE25519_LIBS=
  1163. dnl The best choice is using curve25519-donna-c64, but that requires
  1164. dnl that we
  1165. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  1166. tor_cv_can_use_curve25519_donna_c64,
  1167. [AC_RUN_IFELSE(
  1168. [AC_LANG_PROGRAM([dnl
  1169. #include <stdint.h>
  1170. typedef unsigned uint128_t __attribute__((mode(TI)));
  1171. int func(uint64_t a, uint64_t b) {
  1172. uint128_t c = ((uint128_t)a) * b;
  1173. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1174. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1175. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1176. (((uint64_t)(c))&0xffffffffL) == 0;
  1177. return ok;
  1178. }
  1179. ], [dnl
  1180. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1181. ((uint64_t)1234567890) << 24);
  1182. return !ok;
  1183. ])],
  1184. [tor_cv_can_use_curve25519_donna_c64=yes],
  1185. [tor_cv_can_use_curve25519_donna_c64=no],
  1186. [AC_LINK_IFELSE(
  1187. [AC_LANG_PROGRAM([dnl
  1188. #include <stdint.h>
  1189. typedef unsigned uint128_t __attribute__((mode(TI)));
  1190. int func(uint64_t a, uint64_t b) {
  1191. uint128_t c = ((uint128_t)a) * b;
  1192. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1193. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1194. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1195. (((uint64_t)(c))&0xffffffffL) == 0;
  1196. return ok;
  1197. }
  1198. ], [dnl
  1199. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1200. ((uint64_t)1234567890) << 24);
  1201. return !ok;
  1202. ])],
  1203. [tor_cv_can_use_curve25519_donna_c64=cross],
  1204. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1205. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1206. nacl/crypto_scalarmult_curve25519.h])
  1207. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1208. tor_cv_can_use_curve25519_nacl,
  1209. [tor_saved_LIBS="$LIBS"
  1210. LIBS="$LIBS -lnacl"
  1211. AC_LINK_IFELSE(
  1212. [AC_LANG_PROGRAM([dnl
  1213. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1214. #include <crypto_scalarmult_curve25519.h>
  1215. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1216. #include <nacl/crypto_scalarmult_curve25519.h>
  1217. #endif
  1218. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1219. #error Hey, this is the reference implementation! That's not fast.
  1220. #endif
  1221. ], [
  1222. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1223. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1224. [tor_cv_can_use_curve25519_nacl=no])
  1225. LIBS="$tor_saved_LIBS" ])
  1226. dnl Okay, now we need to figure out which one to actually use. Fall back
  1227. dnl to curve25519-donna.c
  1228. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1229. build_curve25519_donna_c64=yes
  1230. use_curve25519_donna=yes
  1231. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1232. use_curve25519_nacl=yes
  1233. CURVE25519_LIBS=-lnacl
  1234. else
  1235. build_curve25519_donna=yes
  1236. use_curve25519_donna=yes
  1237. fi
  1238. if test "x$use_curve25519_donna" = "xyes"; then
  1239. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1240. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1241. fi
  1242. if test "x$use_curve25519_nacl" = "xyes"; then
  1243. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1244. [Defined if we should use a curve25519 from nacl])
  1245. fi
  1246. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1247. test "x$build_curve25519_donna" = "xyes")
  1248. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1249. test "x$build_curve25519_donna_c64" = "xyes")
  1250. AC_SUBST(CURVE25519_LIBS)
  1251. dnl Make sure to enable support for large off_t if available.
  1252. AC_SYS_LARGEFILE
  1253. AC_CHECK_HEADERS([errno.h \
  1254. fcntl.h \
  1255. signal.h \
  1256. string.h \
  1257. sys/capability.h \
  1258. sys/fcntl.h \
  1259. sys/stat.h \
  1260. sys/time.h \
  1261. sys/types.h \
  1262. time.h \
  1263. unistd.h \
  1264. arpa/inet.h \
  1265. crt_externs.h \
  1266. execinfo.h \
  1267. gnu/libc-version.h \
  1268. grp.h \
  1269. ifaddrs.h \
  1270. inttypes.h \
  1271. limits.h \
  1272. linux/types.h \
  1273. machine/limits.h \
  1274. malloc.h \
  1275. malloc/malloc.h \
  1276. malloc_np.h \
  1277. netdb.h \
  1278. netinet/in.h \
  1279. netinet/in6.h \
  1280. pwd.h \
  1281. readpassphrase.h \
  1282. stdatomic.h \
  1283. sys/eventfd.h \
  1284. sys/file.h \
  1285. sys/ioctl.h \
  1286. sys/limits.h \
  1287. sys/mman.h \
  1288. sys/param.h \
  1289. sys/prctl.h \
  1290. sys/random.h \
  1291. sys/resource.h \
  1292. sys/select.h \
  1293. sys/socket.h \
  1294. sys/statvfs.h \
  1295. sys/syscall.h \
  1296. sys/sysctl.h \
  1297. sys/syslimits.h \
  1298. sys/time.h \
  1299. sys/types.h \
  1300. sys/un.h \
  1301. sys/utime.h \
  1302. sys/wait.h \
  1303. syslog.h \
  1304. utime.h])
  1305. AC_CHECK_HEADERS(sys/param.h)
  1306. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1307. [#ifdef HAVE_SYS_TYPES_H
  1308. #include <sys/types.h>
  1309. #endif
  1310. #ifdef HAVE_SYS_SOCKET_H
  1311. #include <sys/socket.h>
  1312. #endif])
  1313. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1314. [#ifdef HAVE_SYS_TYPES_H
  1315. #include <sys/types.h>
  1316. #endif
  1317. #ifdef HAVE_SYS_SOCKET_H
  1318. #include <sys/socket.h>
  1319. #endif
  1320. #ifdef HAVE_NET_IF_H
  1321. #include <net/if.h>
  1322. #endif
  1323. #ifdef HAVE_NETINET_IN_H
  1324. #include <netinet/in.h>
  1325. #endif])
  1326. AC_CHECK_HEADERS(linux/if.h,[],[],
  1327. [
  1328. #ifdef HAVE_SYS_SOCKET_H
  1329. #include <sys/socket.h>
  1330. #endif
  1331. ])
  1332. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1333. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1334. [#ifdef HAVE_SYS_TYPES_H
  1335. #include <sys/types.h>
  1336. #endif
  1337. #ifdef HAVE_SYS_SOCKET_H
  1338. #include <sys/socket.h>
  1339. #endif
  1340. #ifdef HAVE_LIMITS_H
  1341. #include <limits.h>
  1342. #endif
  1343. #ifdef HAVE_LINUX_TYPES_H
  1344. #include <linux/types.h>
  1345. #endif
  1346. #ifdef HAVE_NETINET_IN6_H
  1347. #include <netinet/in6.h>
  1348. #endif
  1349. #ifdef HAVE_NETINET_IN_H
  1350. #include <netinet/in.h>
  1351. #endif])
  1352. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1353. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1354. [#ifdef HAVE_SYS_TYPES_H
  1355. #include <sys/types.h>
  1356. #endif
  1357. #ifdef HAVE_SYS_SOCKET_H
  1358. #include <sys/socket.h>
  1359. #endif
  1360. #ifdef HAVE_LIMITS_H
  1361. #include <limits.h>
  1362. #endif
  1363. #ifdef HAVE_LINUX_TYPES_H
  1364. #include <linux/types.h>
  1365. #endif
  1366. #ifdef HAVE_NETINET_IN6_H
  1367. #include <netinet/in6.h>
  1368. #endif
  1369. #ifdef HAVE_NETINET_IN_H
  1370. #include <netinet/in.h>
  1371. #endif
  1372. #ifdef HAVE_LINUX_IF_H
  1373. #include <linux/if.h>
  1374. #endif])
  1375. transparent_ok=0
  1376. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1377. transparent_ok=1
  1378. fi
  1379. if test "x$linux_netfilter_ipv4" = "x1"; then
  1380. transparent_ok=1
  1381. fi
  1382. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1383. transparent_ok=1
  1384. fi
  1385. if test "x$transparent_ok" = "x1"; then
  1386. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1387. else
  1388. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1389. fi
  1390. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1391. [#ifdef HAVE_SYS_TYPES_H
  1392. #include <sys/types.h>
  1393. #endif
  1394. #ifdef HAVE_SYS_TIME_H
  1395. #include <sys/time.h>
  1396. #endif])
  1397. AC_CHECK_SIZEOF(char)
  1398. AC_CHECK_SIZEOF(short)
  1399. AC_CHECK_SIZEOF(int)
  1400. AC_CHECK_SIZEOF(long)
  1401. AC_CHECK_SIZEOF(long long)
  1402. AC_CHECK_SIZEOF(__int64)
  1403. AC_CHECK_SIZEOF(void *)
  1404. AC_CHECK_SIZEOF(time_t)
  1405. AC_CHECK_SIZEOF(size_t)
  1406. AC_CHECK_SIZEOF(pid_t)
  1407. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1408. AC_PC_FROM_UCONTEXT([:])
  1409. dnl used to include sockaddr_storage, but everybody has that.
  1410. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1411. [#ifdef HAVE_SYS_TYPES_H
  1412. #include <sys/types.h>
  1413. #endif
  1414. #ifdef HAVE_NETINET_IN_H
  1415. #include <netinet/in.h>
  1416. #endif
  1417. #ifdef HAVE_NETINET_IN6_H
  1418. #include <netinet/in6.h>
  1419. #endif
  1420. #ifdef HAVE_SYS_SOCKET_H
  1421. #include <sys/socket.h>
  1422. #endif
  1423. #ifdef _WIN32
  1424. #define _WIN32_WINNT 0x0501
  1425. #define WIN32_LEAN_AND_MEAN
  1426. #include <winsock2.h>
  1427. #include <ws2tcpip.h>
  1428. #endif
  1429. ])
  1430. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1431. [#ifdef HAVE_SYS_TYPES_H
  1432. #include <sys/types.h>
  1433. #endif
  1434. #ifdef HAVE_NETINET_IN_H
  1435. #include <netinet/in.h>
  1436. #endif
  1437. #ifdef HAVE_NETINET_IN6_H
  1438. #include <netinet/in6.h>
  1439. #endif
  1440. #ifdef HAVE_SYS_SOCKET_H
  1441. #include <sys/socket.h>
  1442. #endif
  1443. #ifdef _WIN32
  1444. #define _WIN32_WINNT 0x0501
  1445. #define WIN32_LEAN_AND_MEAN
  1446. #include <winsock2.h>
  1447. #include <ws2tcpip.h>
  1448. #endif
  1449. ])
  1450. AC_CHECK_TYPES([rlim_t], , ,
  1451. [#ifdef HAVE_SYS_TYPES_H
  1452. #include <sys/types.h>
  1453. #endif
  1454. #ifdef HAVE_SYS_TIME_H
  1455. #include <sys/time.h>
  1456. #endif
  1457. #ifdef HAVE_SYS_RESOURCE_H
  1458. #include <sys/resource.h>
  1459. #endif
  1460. ])
  1461. AX_CHECK_SIGN([time_t],
  1462. [ : ],
  1463. [ : ], [
  1464. #ifdef HAVE_SYS_TYPES_H
  1465. #include <sys/types.h>
  1466. #endif
  1467. #ifdef HAVE_SYS_TIME_H
  1468. #include <sys/time.h>
  1469. #endif
  1470. #ifdef HAVE_TIME_H
  1471. #include <time.h>
  1472. #endif
  1473. ])
  1474. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1475. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1476. fi
  1477. AX_CHECK_SIGN([size_t],
  1478. [ tor_cv_size_t_signed=yes ],
  1479. [ tor_cv_size_t_signed=no ], [
  1480. #ifdef HAVE_SYS_TYPES_H
  1481. #include <sys/types.h>
  1482. #endif
  1483. ])
  1484. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1485. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1486. fi
  1487. AX_CHECK_SIGN([enum always],
  1488. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1489. [ : ], [
  1490. enum always { AAA, BBB, CCC };
  1491. ])
  1492. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1493. #ifdef HAVE_SYS_SOCKET_H
  1494. #include <sys/socket.h>
  1495. #endif
  1496. ])
  1497. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1498. AC_CHECK_SIZEOF(cell_t)
  1499. # Let's see if stdatomic works. (There are some debian clangs that screw it
  1500. # up; see Tor bug #26779 and debian bug 903709.)
  1501. AC_CACHE_CHECK([whether C11 stdatomic.h actually works],
  1502. tor_cv_stdatomic_works,
  1503. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1504. #include <stdatomic.h>
  1505. struct x { atomic_size_t y; };
  1506. void try_atomic_init(struct x *xx)
  1507. {
  1508. atomic_init(&xx->y, 99);
  1509. atomic_fetch_add(&xx->y, 1);
  1510. }
  1511. ]])], [tor_cv_stdatomic_works=yes], [tor_cv_stdatomic_works=no])])
  1512. if test "$tor_cv_stdatomic_works" = "yes"; then
  1513. AC_DEFINE(STDATOMIC_WORKS, 1, [Set to 1 if we can compile a simple stdatomic example.])
  1514. elif test "$ac_cv_header_stdatomic_h" = "yes"; then
  1515. AC_MSG_WARN([Your compiler provides the stdatomic.h header, but it doesn't seem to work. I'll pretend it isn't there. If you are using Clang on Debian, maybe this is because of https://bugs.debian.org/903709 ])
  1516. fi
  1517. # Now make sure that NULL can be represented as zero bytes.
  1518. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1519. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1520. [[#include <stdlib.h>
  1521. #include <string.h>
  1522. #include <stdio.h>
  1523. #ifdef HAVE_STDDEF_H
  1524. #include <stddef.h>
  1525. #endif
  1526. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1527. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1528. [tor_cv_null_is_zero=yes],
  1529. [tor_cv_null_is_zero=no],
  1530. [tor_cv_null_is_zero=cross])])
  1531. if test "$tor_cv_null_is_zero" = "cross"; then
  1532. # Cross-compiling; let's hope that the target isn't raving mad.
  1533. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1534. fi
  1535. if test "$tor_cv_null_is_zero" != "no"; then
  1536. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1537. [Define to 1 iff memset(0) sets pointers to NULL])
  1538. fi
  1539. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1540. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1541. [[#include <stdlib.h>
  1542. #include <string.h>
  1543. #include <stdio.h>
  1544. #ifdef HAVE_STDDEF_H
  1545. #include <stddef.h>
  1546. #endif
  1547. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1548. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1549. [tor_cv_dbl0_is_zero=yes],
  1550. [tor_cv_dbl0_is_zero=no],
  1551. [tor_cv_dbl0_is_zero=cross])])
  1552. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1553. # Cross-compiling; let's hope that the target isn't raving mad.
  1554. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1555. fi
  1556. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1557. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1558. [Define to 1 iff memset(0) sets doubles to 0.0])
  1559. fi
  1560. # And what happens when we malloc zero?
  1561. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1562. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1563. [[#include <stdlib.h>
  1564. #include <string.h>
  1565. #include <stdio.h>
  1566. #ifdef HAVE_STDDEF_H
  1567. #include <stddef.h>
  1568. #endif
  1569. int main () { return malloc(0)?0:1; }]])],
  1570. [tor_cv_malloc_zero_works=yes],
  1571. [tor_cv_malloc_zero_works=no],
  1572. [tor_cv_malloc_zero_works=cross])])
  1573. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1574. # Cross-compiling; let's hope that the target isn't raving mad.
  1575. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1576. fi
  1577. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1578. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1579. [Define to 1 iff malloc(0) returns a pointer])
  1580. fi
  1581. # whether we seem to be in a 2s-complement world.
  1582. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1583. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1584. [[int main () { int problem = ((-99) != (~99)+1);
  1585. return problem ? 1 : 0; }]])],
  1586. [tor_cv_twos_complement=yes],
  1587. [tor_cv_twos_complement=no],
  1588. [tor_cv_twos_complement=cross])])
  1589. if test "$tor_cv_twos_complement" = "cross"; then
  1590. # Cross-compiling; let's hope that the target isn't raving mad.
  1591. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1592. fi
  1593. if test "$tor_cv_twos_complement" != "no"; then
  1594. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1595. [Define to 1 iff we represent negative integers with
  1596. two's complement])
  1597. fi
  1598. # What does shifting a negative value do?
  1599. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1600. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1601. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1602. [tor_cv_sign_extend=yes],
  1603. [tor_cv_sign_extend=no],
  1604. [tor_cv_sign_extend=cross])])
  1605. if test "$tor_cv_sign_extend" = "cross"; then
  1606. # Cross-compiling; let's hope that the target isn't raving mad.
  1607. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1608. fi
  1609. if test "$tor_cv_sign_extend" != "no"; then
  1610. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1611. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1612. fi
  1613. # Is uint8_t the same type as unsigned char?
  1614. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1615. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1616. #include <stdint.h>
  1617. extern uint8_t c;
  1618. unsigned char c;]])],
  1619. [tor_cv_uint8_uchar=yes],
  1620. [tor_cv_uint8_uchar=no],
  1621. [tor_cv_uint8_uchar=cross])])
  1622. if test "$tor_cv_uint8_uchar" = "cross"; then
  1623. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1624. fi
  1625. if test "$tor_cv_uint8_uchar" = "no"; then
  1626. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1627. fi
  1628. AC_ARG_WITH(tcmalloc,
  1629. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library. Deprecated; see --with-malloc]),
  1630. [ tcmalloc=yes ], [ tcmalloc=no ])
  1631. default_malloc=system
  1632. if test "x$enable_openbsd_malloc" = "xyes" ; then
  1633. AC_MSG_NOTICE([The --enable-openbsd-malloc argument is deprecated; use --with-malloc=openbsd instead.])
  1634. default_malloc=openbsd
  1635. fi
  1636. if test "x$tcmalloc" = "xyes"; then
  1637. AC_MSG_NOTICE([The --with-tcmalloc argument is deprecated; use --with-malloc=tcmalloc instead.])
  1638. default_malloc=tcmalloc
  1639. fi
  1640. AC_ARG_WITH(malloc,
  1641. AS_HELP_STRING([--with-malloc=[system,jemalloc,tcmalloc,openbsd]],
  1642. [select special malloc implementation [system]]),
  1643. [ malloc="$with_malloc" ], [ malloc="$default_malloc" ])
  1644. AS_CASE([$malloc],
  1645. [tcmalloc], [
  1646. PKG_CHECK_MODULES([TCMALLOC],
  1647. [libtcmalloc],
  1648. have_tcmalloc=yes,
  1649. have_tcmalloc=no)
  1650. if test "x$have_tcmalloc" = "xno" ; then
  1651. AC_MSG_ERROR([Unable to find tcmalloc requested by --with-malloc.])
  1652. fi
  1653. CFLAGS="$CFLAGS $TCMALLOC_CFLAGS"
  1654. LIBS="$TCMALLOC_LIBS $LIBS"
  1655. ],
  1656. [jemalloc], [
  1657. PKG_CHECK_MODULES([JEMALLOC],
  1658. [jemalloc],
  1659. have_jemalloc=yes,
  1660. have_jemalloc=no)
  1661. if test "x$have_tcmalloc" = "xno" ; then
  1662. AC_MSG_ERROR([Unable to find jemalloc requested by --with-malloc.])
  1663. fi
  1664. CFLAGS="$CFLAGS $JEMALLOC_CFLAGS"
  1665. LIBS="$JEMALLOC_LIBS $LIBS"
  1666. using_custom_malloc=yes
  1667. ],
  1668. [openbsd], [
  1669. AC_MSG_WARN([The openbsd malloc port is deprecated in Tor 0.3.5 and will be removed in a future version.])
  1670. enable_openbsd_malloc=yes
  1671. ],
  1672. [system], [
  1673. # handle this later, including the jemalloc fallback
  1674. AC_CHECK_FUNCS(mallinfo)
  1675. ],
  1676. [AC_MSG_ERROR([--with-malloc=`$with_malloc' not supported, see --help])
  1677. ])
  1678. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  1679. if test "$malloc" != "system"; then
  1680. # Tell the C compiler not to use the system allocator functions.
  1681. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1682. fi
  1683. if test "$using_custom_malloc" = "yes"; then
  1684. # Tell the C compiler not to use the system allocator functions.
  1685. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1686. fi
  1687. # By default, we're going to assume we don't have mlockall()
  1688. # bionic and other platforms have various broken mlockall subsystems.
  1689. # Some systems don't have a working mlockall, some aren't linkable,
  1690. # and some have it but don't declare it.
  1691. AC_CHECK_FUNCS(mlockall)
  1692. AC_CHECK_DECLS([mlockall], , , [
  1693. #ifdef HAVE_SYS_MMAN_H
  1694. #include <sys/mman.h>
  1695. #endif])
  1696. # Allow user to specify an alternate syslog facility
  1697. AC_ARG_WITH(syslog-facility,
  1698. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1699. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1700. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1701. AC_SUBST(LOGFACILITY)
  1702. # Check if we have getresuid and getresgid
  1703. AC_CHECK_FUNCS(getresuid getresgid)
  1704. # Check for gethostbyname_r in all its glorious incompatible versions.
  1705. # (This logic is based on that in Python's configure.in)
  1706. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1707. [Define this if you have any gethostbyname_r()])
  1708. AC_CHECK_FUNC(gethostbyname_r, [
  1709. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1710. OLD_CFLAGS=$CFLAGS
  1711. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1712. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1713. #include <netdb.h>
  1714. ]], [[
  1715. char *cp1, *cp2;
  1716. struct hostent *h1, *h2;
  1717. int i1, i2;
  1718. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1719. ]])],[
  1720. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1721. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1722. [Define this if gethostbyname_r takes 6 arguments])
  1723. AC_MSG_RESULT(6)
  1724. ], [
  1725. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1726. #include <netdb.h>
  1727. ]], [[
  1728. char *cp1, *cp2;
  1729. struct hostent *h1;
  1730. int i1, i2;
  1731. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1732. ]])], [
  1733. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1734. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1735. [Define this if gethostbyname_r takes 5 arguments])
  1736. AC_MSG_RESULT(5)
  1737. ], [
  1738. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1739. #include <netdb.h>
  1740. ]], [[
  1741. char *cp1;
  1742. struct hostent *h1;
  1743. struct hostent_data hd;
  1744. (void) gethostbyname_r(cp1,h1,&hd);
  1745. ]])], [
  1746. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1747. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1748. [Define this if gethostbyname_r takes 3 arguments])
  1749. AC_MSG_RESULT(3)
  1750. ], [
  1751. AC_MSG_RESULT(0)
  1752. ])
  1753. ])
  1754. ])
  1755. CFLAGS=$OLD_CFLAGS
  1756. ])
  1757. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1758. tor_cv_have_func_macro,
  1759. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1760. #include <stdio.h>
  1761. int main(int c, char **v) { puts(__func__); }])],
  1762. tor_cv_have_func_macro=yes,
  1763. tor_cv_have_func_macro=no))
  1764. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1765. tor_cv_have_FUNC_macro,
  1766. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1767. #include <stdio.h>
  1768. int main(int c, char **v) { puts(__FUNC__); }])],
  1769. tor_cv_have_FUNC_macro=yes,
  1770. tor_cv_have_FUNC_macro=no))
  1771. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1772. tor_cv_have_FUNCTION_macro,
  1773. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1774. #include <stdio.h>
  1775. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1776. tor_cv_have_FUNCTION_macro=yes,
  1777. tor_cv_have_FUNCTION_macro=no))
  1778. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1779. tor_cv_have_environ_declared,
  1780. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1781. #ifdef HAVE_UNISTD_H
  1782. #include <unistd.h>
  1783. #endif
  1784. #include <stdlib.h>
  1785. int main(int c, char **v) { char **t = environ; }])],
  1786. tor_cv_have_environ_declared=yes,
  1787. tor_cv_have_environ_declared=no))
  1788. if test "$tor_cv_have_func_macro" = "yes"; then
  1789. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1790. fi
  1791. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1792. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1793. fi
  1794. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1795. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1796. [Defined if the compiler supports __FUNCTION__])
  1797. fi
  1798. if test "$tor_cv_have_environ_declared" = "yes"; then
  1799. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1800. [Defined if we have extern char **environ already declared])
  1801. fi
  1802. # $prefix stores the value of the --prefix command line option, or
  1803. # NONE if the option wasn't set. In the case that it wasn't set, make
  1804. # it be the default, so that we can use it to expand directories now.
  1805. if test "x$prefix" = "xNONE"; then
  1806. prefix=$ac_default_prefix
  1807. fi
  1808. # and similarly for $exec_prefix
  1809. if test "x$exec_prefix" = "xNONE"; then
  1810. exec_prefix=$prefix
  1811. fi
  1812. if test "x$BUILDDIR" = "x"; then
  1813. BUILDDIR=`pwd`
  1814. fi
  1815. AC_SUBST(BUILDDIR)
  1816. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1817. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1818. if test "x$SRCDIR" = "x"; then
  1819. SRCDIR=$(cd "$srcdir"; pwd)
  1820. fi
  1821. AH_TEMPLATE([SRCDIR],[tor's sourcedir directory])
  1822. AC_DEFINE_UNQUOTED(SRCDIR,"$SRCDIR")
  1823. if test "x$CONFDIR" = "x"; then
  1824. CONFDIR=`eval echo $sysconfdir/tor`
  1825. fi
  1826. AC_SUBST(CONFDIR)
  1827. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1828. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1829. BINDIR=`eval echo $bindir`
  1830. AC_SUBST(BINDIR)
  1831. LOCALSTATEDIR=`eval echo $localstatedir`
  1832. AC_SUBST(LOCALSTATEDIR)
  1833. if test "$bwin32" = "true"; then
  1834. # Test if the linker supports the --nxcompat and --dynamicbase options
  1835. # for Windows
  1836. save_LDFLAGS="$LDFLAGS"
  1837. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1838. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1839. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1840. [AC_MSG_RESULT([yes])]
  1841. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1842. [AC_MSG_RESULT([no])]
  1843. )
  1844. LDFLAGS="$save_LDFLAGS"
  1845. fi
  1846. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1847. # than autoconf's macros like.
  1848. if test "$GCC" = "yes"; then
  1849. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1850. # accident waiting to happen.
  1851. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1852. else
  1853. # Override optimization level for non-gcc compilers
  1854. CFLAGS="$CFLAGS -O"
  1855. enable_gcc_warnings=no
  1856. enable_gcc_warnings_advisory=no
  1857. fi
  1858. # Warnings implies advisory-warnings and -Werror.
  1859. if test "$enable_gcc_warnings" = "yes"; then
  1860. enable_gcc_warnings_advisory=yes
  1861. enable_fatal_warnings=yes
  1862. fi
  1863. # OS X Lion started deprecating the system openssl. Let's just disable
  1864. # all deprecation warnings on OS X. Also, to potentially make the binary
  1865. # a little smaller, let's enable dead_strip.
  1866. case "$host_os" in
  1867. darwin*)
  1868. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1869. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1870. esac
  1871. # Add some more warnings which we use in development but not in the
  1872. # released versions. (Some relevant gcc versions can't handle these.)
  1873. #
  1874. # Note that we have to do this near the end of the autoconf process, or
  1875. # else we may run into problems when these warnings hit on the testing C
  1876. # programs that autoconf wants to build.
  1877. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1878. case "$host" in
  1879. *-*-openbsd* | *-*-bitrig*)
  1880. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1881. # That's fine, except that the headers don't pass -Wredundant-decls.
  1882. # Therefore, let's disable -Wsystem-headers when we're building
  1883. # with maximal warnings on OpenBSD.
  1884. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1885. esac
  1886. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1887. # have it work better.
  1888. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1889. # This warning was added in gcc 4.3, but it appears to generate
  1890. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1891. #CFLAGS="$CFLAGS -Wlogical-op"
  1892. m4_foreach_w([warning_flag], [
  1893. -Waddress
  1894. -Waddress-of-array-temporary
  1895. -Waddress-of-temporary
  1896. -Wambiguous-macro
  1897. -Wanonymous-pack-parens
  1898. -Warc
  1899. -Warc-abi
  1900. -Warc-bridge-casts-disallowed-in-nonarc
  1901. -Warc-maybe-repeated-use-of-weak
  1902. -Warc-performSelector-leaks
  1903. -Warc-repeated-use-of-weak
  1904. -Warray-bounds
  1905. -Warray-bounds-pointer-arithmetic
  1906. -Wasm
  1907. -Wasm-operand-widths
  1908. -Watomic-properties
  1909. -Watomic-property-with-user-defined-accessor
  1910. -Wauto-import
  1911. -Wauto-storage-class
  1912. -Wauto-var-id
  1913. -Wavailability
  1914. -Wbackslash-newline-escape
  1915. -Wbad-array-new-length
  1916. -Wbind-to-temporary-copy
  1917. -Wbitfield-constant-conversion
  1918. -Wbool-conversion
  1919. -Wbool-conversions
  1920. -Wbuiltin-requires-header
  1921. -Wchar-align
  1922. -Wcompare-distinct-pointer-types
  1923. -Wcomplex-component-init
  1924. -Wconditional-type-mismatch
  1925. -Wconfig-macros
  1926. -Wconstant-conversion
  1927. -Wconstant-logical-operand
  1928. -Wconstexpr-not-const
  1929. -Wcustom-atomic-properties
  1930. -Wdangling-field
  1931. -Wdangling-initializer-list
  1932. -Wdate-time
  1933. -Wdelegating-ctor-cycles
  1934. -Wdeprecated-implementations
  1935. -Wdeprecated-register
  1936. -Wdirect-ivar-access
  1937. -Wdiscard-qual
  1938. -Wdistributed-object-modifiers
  1939. -Wdivision-by-zero
  1940. -Wdollar-in-identifier-extension
  1941. -Wdouble-promotion
  1942. -Wduplicate-decl-specifier
  1943. -Wduplicate-enum
  1944. -Wduplicate-method-arg
  1945. -Wduplicate-method-match
  1946. -Wduplicated-cond
  1947. -Wdynamic-class-memaccess
  1948. -Wembedded-directive
  1949. -Wempty-translation-unit
  1950. -Wenum-conversion
  1951. -Wexit-time-destructors
  1952. -Wexplicit-ownership-type
  1953. -Wextern-initializer
  1954. -Wextra
  1955. -Wextra-semi
  1956. -Wextra-tokens
  1957. -Wflexible-array-extensions
  1958. -Wfloat-conversion
  1959. -Wformat-non-iso
  1960. -Wfour-char-constants
  1961. -Wgcc-compat
  1962. -Wglobal-constructors
  1963. -Wgnu-array-member-paren-init
  1964. -Wgnu-designator
  1965. -Wgnu-static-float-init
  1966. -Wheader-guard
  1967. -Wheader-hygiene
  1968. -Widiomatic-parentheses
  1969. -Wignored-attributes
  1970. -Wimplicit-atomic-properties
  1971. -Wimplicit-conversion-floating-point-to-bool
  1972. -Wimplicit-exception-spec-mismatch
  1973. -Wimplicit-fallthrough
  1974. -Wimplicit-fallthrough-per-function
  1975. -Wimplicit-retain-self
  1976. -Wimport-preprocessor-directive-pedantic
  1977. -Wincompatible-library-redeclaration
  1978. -Wincompatible-pointer-types-discards-qualifiers
  1979. -Wincomplete-implementation
  1980. -Wincomplete-module
  1981. -Wincomplete-umbrella
  1982. -Winit-self
  1983. -Wint-conversions
  1984. -Wint-to-void-pointer-cast
  1985. -Winteger-overflow
  1986. -Winvalid-constexpr
  1987. -Winvalid-iboutlet
  1988. -Winvalid-noreturn
  1989. -Winvalid-pp-token
  1990. -Winvalid-source-encoding
  1991. -Winvalid-token-paste
  1992. -Wknr-promoted-parameter
  1993. -Wlarge-by-value-copy
  1994. -Wliteral-conversion
  1995. -Wliteral-range
  1996. -Wlocal-type-template-args
  1997. -Wlogical-op
  1998. -Wloop-analysis
  1999. -Wmain-return-type
  2000. -Wmalformed-warning-check
  2001. -Wmethod-signatures
  2002. -Wmicrosoft
  2003. -Wmicrosoft-exists
  2004. -Wmismatched-parameter-types
  2005. -Wmismatched-return-types
  2006. -Wmissing-field-initializers
  2007. -Wmissing-format-attribute
  2008. -Wmissing-noreturn
  2009. -Wmissing-selector-name
  2010. -Wmissing-sysroot
  2011. -Wmissing-variable-declarations
  2012. -Wmodule-conflict
  2013. -Wnested-anon-types
  2014. -Wnewline-eof
  2015. -Wnon-literal-null-conversion
  2016. -Wnon-pod-varargs
  2017. -Wnonportable-cfstrings
  2018. -Wnormalized=nfkc
  2019. -Wnull-arithmetic
  2020. -Wnull-character
  2021. -Wnull-conversion
  2022. -Wnull-dereference
  2023. -Wout-of-line-declaration
  2024. -Wover-aligned
  2025. -Woverlength-strings
  2026. -Woverride-init
  2027. -Woverriding-method-mismatch
  2028. -Wpointer-type-mismatch
  2029. -Wpredefined-identifier-outside-function
  2030. -Wprotocol-property-synthesis-ambiguity
  2031. -Wreadonly-iboutlet-property
  2032. -Wreadonly-setter-attrs
  2033. -Wreceiver-expr
  2034. -Wreceiver-forward-class
  2035. -Wreceiver-is-weak
  2036. -Wreinterpret-base-class
  2037. -Wrequires-super-attribute
  2038. -Wreserved-user-defined-literal
  2039. -Wreturn-stack-address
  2040. -Wsection
  2041. -Wselector-type-mismatch
  2042. -Wsentinel
  2043. -Wserialized-diagnostics
  2044. -Wshadow
  2045. -Wshift-count-negative
  2046. -Wshift-count-overflow
  2047. -Wshift-negative-value
  2048. -Wshift-overflow=2
  2049. -Wshift-sign-overflow
  2050. -Wshorten-64-to-32
  2051. -Wsizeof-array-argument
  2052. -Wsource-uses-openmp
  2053. -Wstatic-float-init
  2054. -Wstatic-in-inline
  2055. -Wstatic-local-in-inline
  2056. -Wstrict-overflow=1
  2057. -Wstring-compare
  2058. -Wstring-conversion
  2059. -Wstrlcpy-strlcat-size
  2060. -Wstrncat-size
  2061. -Wsuggest-attribute=format
  2062. -Wsuggest-attribute=noreturn
  2063. -Wsuper-class-method-mismatch
  2064. -Wswitch-bool
  2065. -Wsync-nand
  2066. -Wtautological-constant-out-of-range-compare
  2067. -Wtentative-definition-incomplete-type
  2068. -Wtrampolines
  2069. -Wtype-safety
  2070. -Wtypedef-redefinition
  2071. -Wtypename-missing
  2072. -Wundefined-inline
  2073. -Wundefined-internal
  2074. -Wundefined-reinterpret-cast
  2075. -Wunicode
  2076. -Wunicode-whitespace
  2077. -Wunknown-warning-option
  2078. -Wunnamed-type-template-args
  2079. -Wunneeded-member-function
  2080. -Wunsequenced
  2081. -Wunsupported-visibility
  2082. -Wunused-but-set-parameter
  2083. -Wunused-but-set-variable
  2084. -Wunused-command-line-argument
  2085. -Wunused-const-variable=2
  2086. -Wunused-exception-parameter
  2087. -Wunused-local-typedefs
  2088. -Wunused-member-function
  2089. -Wunused-sanitize-argument
  2090. -Wunused-volatile-lvalue
  2091. -Wuser-defined-literals
  2092. -Wvariadic-macros
  2093. -Wvector-conversion
  2094. -Wvector-conversions
  2095. -Wvexing-parse
  2096. -Wvisibility
  2097. -Wvla-extension
  2098. -Wzero-length-array
  2099. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  2100. dnl We should re-enable this in some later version. Clang doesn't
  2101. dnl mind, but it causes trouble with GCC.
  2102. dnl -Wstrict-overflow=2
  2103. dnl These seem to require annotations that we don't currently use,
  2104. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  2105. dnl -Wthread-safety
  2106. dnl -Wthread-safety-analysis
  2107. dnl -Wthread-safety-attributes
  2108. dnl -Wthread-safety-beta
  2109. dnl -Wthread-safety-precise
  2110. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  2111. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  2112. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  2113. CFLAGS="$CFLAGS -Wwrite-strings"
  2114. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  2115. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  2116. CFLAGS="$CFLAGS -Wunused-parameter "
  2117. # These interfere with building main() { return 0; }, which autoconf
  2118. # likes to use as its default program.
  2119. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  2120. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  2121. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  2122. fi
  2123. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  2124. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  2125. fi
  2126. if test "$tor_cv_cflags__warn_unused_const_variable_2" = "yes"; then
  2127. AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
  2128. fi
  2129. if test "x$enable_fatal_warnings" = "xyes"; then
  2130. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  2131. # default autoconf programs are full of errors.
  2132. CFLAGS="$CFLAGS -Werror"
  2133. fi
  2134. fi
  2135. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  2136. case "$host_os" in
  2137. darwin*)
  2138. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  2139. esac
  2140. fi
  2141. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  2142. AC_CONFIG_FILES([
  2143. Doxyfile
  2144. Makefile
  2145. config.rust
  2146. contrib/dist/suse/tor.sh
  2147. contrib/operator-tools/tor.logrotate
  2148. contrib/dist/tor.sh
  2149. contrib/dist/torctl
  2150. contrib/dist/tor.service
  2151. src/config/torrc.sample
  2152. src/config/torrc.minimal
  2153. src/rust/.cargo/config
  2154. scripts/maint/checkOptionDocs.pl
  2155. scripts/maint/updateVersions.pl
  2156. ])
  2157. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  2158. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  2159. for file in $regular_mans ; do
  2160. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  2161. echo "==================================";
  2162. echo;
  2163. echo "Building Tor has failed since manpages cannot be built.";
  2164. echo;
  2165. echo "You need asciidoc installed to be able to build the manpages.";
  2166. echo "To build without manpages, use the --disable-asciidoc argument";
  2167. echo "when calling configure.";
  2168. echo;
  2169. echo "==================================";
  2170. exit 1;
  2171. fi
  2172. done
  2173. fi
  2174. if test "$fragile_hardening" = "yes"; then
  2175. AC_MSG_WARN([
  2176. ============
  2177. Warning! Building Tor with --enable-fragile-hardening (also known as
  2178. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  2179. other kinds of attacks easier. A Tor instance build with this option will be
  2180. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  2181. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  2182. denial of service attacks. For more information, see
  2183. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  2184. ============
  2185. ])
  2186. fi
  2187. AC_OUTPUT