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. # DO NOT EDIT THIS DEFINITION BY HAND UNLESS YOU KNOW WHAT YOU'RE DOING.
  10. #
  11. # The update_versions.py script updates this definition when the
  12. # version number changes. Tor uses it to make sure that it
  13. # only shuts down for missing "required protocols" when those protocols
  14. # are listed as required by a consensus after this date.
  15. AC_DEFINE(APPROX_RELEASE_DATE, ["2019-01-15"], # for 0.4.0.0-alpha-dev
  16. [Approximate date when this software was released. (Updated when the version changes.)])
  17. # "foreign" means we don't follow GNU package layout standards
  18. # "1.11" means we require automake version 1.11 or newer
  19. # "subdir-objects" means put .o files in the same directory as the .c files
  20. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  21. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  22. AC_CONFIG_HEADERS([orconfig.h])
  23. AC_USE_SYSTEM_EXTENSIONS
  24. AC_CANONICAL_HOST
  25. PKG_PROG_PKG_CONFIG
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only. Deprecated: see --with-malloc]))
  28. AC_ARG_ENABLE(static-openssl,
  29. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  30. AC_ARG_ENABLE(static-libevent,
  31. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  32. AC_ARG_ENABLE(static-zlib,
  33. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  34. AC_ARG_ENABLE(static-tor,
  35. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  36. AC_ARG_ENABLE(unittests,
  37. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  38. AC_ARG_ENABLE(coverage,
  39. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  40. AC_ARG_ENABLE(asserts-in-tests,
  41. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  42. AC_ARG_ENABLE(system-torrc,
  43. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  44. AC_ARG_ENABLE(libfuzzer,
  45. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  46. AC_ARG_ENABLE(oss-fuzz,
  47. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  48. AC_ARG_ENABLE(memory-sentinels,
  49. AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
  50. AC_ARG_ENABLE(rust,
  51. AS_HELP_STRING(--enable-rust, [enable rust integration]))
  52. AC_ARG_ENABLE(cargo-online-mode,
  53. AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
  54. AC_ARG_ENABLE(restart-debugging,
  55. AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
  56. AC_ARG_ENABLE(zstd-advanced-apis,
  57. AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
  58. AC_ARG_ENABLE(nss,
  59. AS_HELP_STRING(--enable-nss, [Use Mozilla's NSS TLS library. (EXPERIMENTAL)]))
  60. AC_ARG_ENABLE(pic,
  61. AS_HELP_STRING(--enable-pic, [Build Tor's binaries as position-independent code, suitable to link as a library.]))
  62. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  63. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  64. fi
  65. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  66. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  67. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  68. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  69. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  70. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  71. AM_CONDITIONAL(USE_NSS, test "x$enable_nss" = "xyes")
  72. AM_CONDITIONAL(USE_OPENSSL, test "x$enable_nss" != "xyes")
  73. if test "x$enable_nss" = "xyes"; then
  74. AC_DEFINE(ENABLE_NSS, 1,
  75. [Defined if we're building with NSS.])
  76. else
  77. AC_DEFINE(ENABLE_OPENSSL, 1,
  78. [Defined if we're building with OpenSSL or LibreSSL])
  79. fi
  80. if test "$enable_static_tor" = "yes"; then
  81. enable_static_libevent="yes";
  82. enable_static_openssl="yes";
  83. enable_static_zlib="yes";
  84. CFLAGS="$CFLAGS -static"
  85. fi
  86. if test "$enable_system_torrc" = "no"; then
  87. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  88. [Defined if we're not going to look for a torrc in SYSCONF])
  89. fi
  90. if test "$enable_memory_sentinels" = "no"; then
  91. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  92. [Defined if we're turning off memory safety code to look for bugs])
  93. fi
  94. AC_ARG_ENABLE(asciidoc,
  95. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  96. [case "${enableval}" in
  97. "yes") asciidoc=true ;;
  98. "no") asciidoc=false ;;
  99. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  100. esac], [asciidoc=true])
  101. # systemd notify support
  102. AC_ARG_ENABLE(systemd,
  103. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  104. [case "${enableval}" in
  105. "yes") systemd=true ;;
  106. "no") systemd=false ;;
  107. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  108. esac], [systemd=auto])
  109. if test "$enable_restart_debugging" = "yes"; then
  110. AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
  111. [Defined if we're building with support for in-process restart debugging.])
  112. fi
  113. if test "$enable_zstd_advanced_apis" != "no"; then
  114. AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
  115. [Defined if we're going to try to use zstd's "static-only" APIs.])
  116. fi
  117. # systemd support
  118. if test "x$enable_systemd" = "xno"; then
  119. have_systemd=no;
  120. else
  121. PKG_CHECK_MODULES(SYSTEMD,
  122. [libsystemd-daemon],
  123. have_systemd=yes,
  124. have_systemd=no)
  125. if test "x$have_systemd" = "xno"; then
  126. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  127. PKG_CHECK_MODULES(SYSTEMD,
  128. [libsystemd],
  129. have_systemd=yes,
  130. have_systemd=no)
  131. fi
  132. fi
  133. if test "x$have_systemd" = "xyes"; then
  134. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  135. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  136. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  137. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  138. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  139. fi
  140. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  141. AC_SUBST(TOR_SYSTEMD_LIBS)
  142. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  143. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  144. fi
  145. case "$host" in
  146. *-*-solaris* )
  147. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  148. ;;
  149. esac
  150. AC_ARG_ENABLE(gcc-warnings,
  151. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  152. AC_ARG_ENABLE(fatal-warnings,
  153. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  154. AC_ARG_ENABLE(gcc-warnings-advisory,
  155. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  156. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  157. AC_ARG_ENABLE(gcc-hardening,
  158. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  159. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  160. AC_ARG_ENABLE(expensive-hardening,
  161. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  162. AC_ARG_ENABLE(fragile-hardening,
  163. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  164. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  165. fragile_hardening="yes"
  166. AC_DEFINE(DEBUG_SMARTLIST, 1, [Enable smartlist debugging])
  167. fi
  168. dnl Linker hardening options
  169. dnl Currently these options are ELF specific - you can't use this with MacOSX
  170. AC_ARG_ENABLE(linker-hardening,
  171. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  172. AC_ARG_ENABLE(local-appdata,
  173. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  174. if test "$enable_local_appdata" = "yes"; then
  175. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  176. [Defined if we default to host local appdata paths on Windows])
  177. fi
  178. AC_ARG_ENABLE(tool-name-check,
  179. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  180. AC_ARG_ENABLE(seccomp,
  181. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  182. AC_ARG_ENABLE(libscrypt,
  183. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  184. dnl Enable event tracing which are transformed to debug log statement.
  185. AC_ARG_ENABLE(event-tracing-debug,
  186. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  187. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  188. if test x$enable_event_tracing_debug = xyes; then
  189. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  190. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  191. fi
  192. dnl Enable Android only features.
  193. AC_ARG_ENABLE(android,
  194. AS_HELP_STRING(--enable-android, [build with Android features enabled]))
  195. AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
  196. if test "x$enable_android" = "xyes"; then
  197. AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
  198. dnl Check if the Android log library is available.
  199. AC_CHECK_HEADERS([android/log.h])
  200. AC_SEARCH_LIBS(__android_log_write, [log])
  201. fi
  202. dnl ---
  203. dnl Tor modules options. These options are namespaced with --disable-module-XXX
  204. dnl ---
  205. dnl All our modules.
  206. m4_define(MODULES, dirauth)
  207. dnl Directory Authority module.
  208. AC_ARG_ENABLE([module-dirauth],
  209. AS_HELP_STRING([--disable-module-dirauth],
  210. [Do not build tor with the dirauth module]),
  211. [], dnl Action if-given
  212. AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
  213. [Compile with Directory Authority feature support]))
  214. AM_CONDITIONAL(BUILD_MODULE_DIRAUTH, [test "x$enable_module_dirauth" != "xno"])
  215. dnl Helper variables.
  216. TOR_MODULES_ALL_ENABLED=
  217. AC_DEFUN([ADD_MODULE], [
  218. MODULE=m4_toupper($1)
  219. TOR_MODULES_ALL_ENABLED="${TOR_MODULES_ALL_ENABLED} -DHAVE_MODULE_${MODULE}=1"
  220. ])
  221. m4_foreach_w([module], MODULES, [ADD_MODULE([module])])
  222. AC_SUBST(TOR_MODULES_ALL_ENABLED)
  223. dnl check for the correct "ar" when cross-compiling.
  224. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  225. dnl so kludge up a replacement for the case where it isn't there yet.)
  226. m4_ifdef([AM_PROG_AR],
  227. [AM_PROG_AR],
  228. [AN_MAKEVAR([AR], [AC_PROG_AR])
  229. AN_PROGRAM([ar], [AC_PROG_AR])
  230. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  231. AC_PROG_AR])
  232. dnl Check whether the above macro has settled for a simply named tool even
  233. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  234. dnl because that will find any cc on the system, not only the cross-compiler,
  235. dnl and then verify that a binary built with this compiler runs on the
  236. dnl build system. It will then come to the false conclusion that we're not
  237. dnl cross-compiling.
  238. if test "x$enable_tool_name_check" != "xno"; then
  239. if test "x$ac_tool_warned" = "xyes"; then
  240. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  241. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  242. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  243. fi
  244. fi
  245. AC_PROG_CC
  246. AC_PROG_CPP
  247. AC_PROG_MAKE_SET
  248. AC_PROG_RANLIB
  249. AC_PROG_SED
  250. AC_ARG_VAR([PERL], [path to Perl binary])
  251. AC_CHECK_PROGS([PERL], [perl])
  252. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  253. dnl check for asciidoc and a2x
  254. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  255. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  256. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  257. AM_PROG_CC_C_O
  258. AC_PROG_CC_C99
  259. AC_ARG_VAR([PYTHON], [path to Python binary])
  260. AC_CHECK_PROGS(PYTHON, [ \
  261. python3 \
  262. python3.8 python3.7 python3.6 python3.5 python3.4 \
  263. python \
  264. python2 python2.7])
  265. if test "x$PYTHON" = "x"; then
  266. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  267. fi
  268. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  269. dnl List all external rust crates we depend on here. Include the version
  270. rust_crates=" \
  271. digest-0.7.2 \
  272. libc-0.2.39 \
  273. "
  274. AC_SUBST(rust_crates)
  275. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  276. AC_C_FLEXIBLE_ARRAY_MEMBER
  277. ], [
  278. dnl Maybe we've got an old autoconf...
  279. AC_CACHE_CHECK([for flexible array members],
  280. tor_cv_c_flexarray,
  281. [AC_COMPILE_IFELSE(
  282. AC_LANG_PROGRAM([
  283. struct abc { int a; char b[]; };
  284. ], [
  285. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  286. def->b[0] = 33;
  287. ]),
  288. [tor_cv_c_flexarray=yes],
  289. [tor_cv_c_flexarray=no])])
  290. if test "$tor_cv_flexarray" = "yes"; then
  291. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  292. else
  293. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  294. fi
  295. ])
  296. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  297. tor_cv_c_c99_decl,
  298. [AC_COMPILE_IFELSE(
  299. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  300. [tor_cv_c_c99_decl=yes],
  301. [tor_cv_c_c99_decl=no] )])
  302. if test "$tor_cv_c_c99_decl" != "yes"; then
  303. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  304. fi
  305. AC_CACHE_CHECK([for working C99 designated initializers],
  306. tor_cv_c_c99_designated_init,
  307. [AC_COMPILE_IFELSE(
  308. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  309. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  310. [tor_cv_c_c99_designated_init=yes],
  311. [tor_cv_c_c99_designated_init=no] )])
  312. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  313. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  314. fi
  315. TORUSER=_tor
  316. AC_ARG_WITH(tor-user,
  317. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  318. [
  319. TORUSER=$withval
  320. ]
  321. )
  322. AC_SUBST(TORUSER)
  323. TORGROUP=_tor
  324. AC_ARG_WITH(tor-group,
  325. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  326. [
  327. TORGROUP=$withval
  328. ]
  329. )
  330. AC_SUBST(TORGROUP)
  331. dnl If _WIN32 is defined and non-zero, we are building for win32
  332. AC_MSG_CHECKING([for win32])
  333. AC_RUN_IFELSE([AC_LANG_SOURCE([
  334. int main(int c, char **v) {
  335. #ifdef _WIN32
  336. #if _WIN32
  337. return 0;
  338. #else
  339. return 1;
  340. #endif
  341. #else
  342. return 2;
  343. #endif
  344. }])],
  345. bwin32=true; AC_MSG_RESULT([yes]),
  346. bwin32=false; AC_MSG_RESULT([no]),
  347. bwin32=cross; AC_MSG_RESULT([cross])
  348. )
  349. if test "$bwin32" = "cross"; then
  350. AC_MSG_CHECKING([for win32 (cross)])
  351. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  352. #ifdef _WIN32
  353. int main(int c, char **v) {return 0;}
  354. #else
  355. #error
  356. int main(int c, char **v) {return x(y);}
  357. #endif
  358. ])],
  359. bwin32=true; AC_MSG_RESULT([yes]),
  360. bwin32=false; AC_MSG_RESULT([no]))
  361. fi
  362. AH_BOTTOM([
  363. #ifdef _WIN32
  364. /* Defined to access windows functions and definitions for >=WinXP */
  365. # ifndef WINVER
  366. # define WINVER 0x0501
  367. # endif
  368. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  369. # ifndef _WIN32_WINNT
  370. # define _WIN32_WINNT 0x0501
  371. # endif
  372. /* Defined to avoid including some windows headers as part of Windows.h */
  373. # ifndef WIN32_LEAN_AND_MEAN
  374. # define WIN32_LEAN_AND_MEAN 1
  375. # endif
  376. #endif
  377. ])
  378. AM_CONDITIONAL(WIN32, test "x$bwin32" = "xtrue")
  379. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  380. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  381. dnl Enable C99 when compiling with MIPSpro
  382. AC_MSG_CHECKING([for MIPSpro compiler])
  383. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  384. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  385. #error
  386. return x(y);
  387. #endif
  388. ])],
  389. bmipspro=false; AC_MSG_RESULT(no),
  390. bmipspro=true; AC_MSG_RESULT(yes))
  391. if test "$bmipspro" = "true"; then
  392. CFLAGS="$CFLAGS -c99"
  393. fi
  394. AC_C_BIGENDIAN
  395. AC_ARG_VAR([TOR_RUST_TARGET], [Rust target, must be specified when cross-compiling (HOST != BUILD). example: i686-pc-windows-gnu])
  396. if test "x$enable_rust" = "xyes"; then
  397. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  398. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  399. if test "x$RUSTC" = "xno"; then
  400. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  401. fi
  402. AC_ARG_VAR([CARGO], [path to the cargo binary])
  403. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  404. if test "x$CARGO" = "xno"; then
  405. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  406. fi
  407. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  408. if test "x$enable_fatal_warnings" = "xyes"; then
  409. RUST_WARN=
  410. else
  411. RUST_WARN=#
  412. fi
  413. if test "x$enable_cargo_online_mode" = "xyes"; then
  414. CARGO_ONLINE=
  415. RUST_DL=#
  416. else
  417. CARGO_ONLINE=--frozen
  418. RUST_DL=
  419. dnl When we're not allowed to touch the network, we need crate dependencies
  420. dnl locally available.
  421. AC_MSG_CHECKING([rust crate dependencies])
  422. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  423. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  424. TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
  425. fi
  426. dnl Check whether the path exists before we try to cd into it.
  427. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  428. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  429. ERRORED=1
  430. fi
  431. dnl Make the path absolute, since we'll be using it from within a
  432. dnl subdirectory.
  433. TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
  434. for dep in $rust_crates; do
  435. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  436. 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.])
  437. ERRORED=1
  438. fi
  439. done
  440. if test "x$ERRORED" = "x"; then
  441. AC_MSG_RESULT([yes])
  442. fi
  443. fi
  444. dnl For now both MSVC and MinGW rust libraries will output static libs with
  445. dnl the MSVC naming convention.
  446. if test "$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([$RUSTC_VERSION])
  482. fi
  483. AC_SEARCH_LIBS(socket, [socket network])
  484. AC_SEARCH_LIBS(gethostbyname, [nsl])
  485. AC_SEARCH_LIBS(dlopen, [dl])
  486. AC_SEARCH_LIBS(inet_aton, [resolv])
  487. AC_SEARCH_LIBS(backtrace, [execinfo])
  488. saved_LIBS="$LIBS"
  489. AC_SEARCH_LIBS([clock_gettime], [rt])
  490. if test "$LIBS" != "$saved_LIBS"; then
  491. # Looks like we need -lrt for clock_gettime().
  492. have_rt=yes
  493. fi
  494. if test "$bwin32" = "false"; then
  495. AC_SEARCH_LIBS(pthread_create, [pthread])
  496. AC_SEARCH_LIBS(pthread_detach, [pthread])
  497. fi
  498. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  499. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  500. AC_CHECK_FUNCS(
  501. _NSGetEnviron \
  502. RtlSecureZeroMemory \
  503. SecureZeroMemory \
  504. accept4 \
  505. backtrace \
  506. backtrace_symbols_fd \
  507. eventfd \
  508. explicit_bzero \
  509. timingsafe_memcmp \
  510. flock \
  511. ftime \
  512. get_current_dir_name \
  513. getaddrinfo \
  514. getdelim \
  515. getifaddrs \
  516. getline \
  517. getpass \
  518. getrlimit \
  519. gettimeofday \
  520. gmtime_r \
  521. gnu_get_libc_version \
  522. htonll \
  523. inet_aton \
  524. ioctl \
  525. issetugid \
  526. llround \
  527. localtime_r \
  528. lround \
  529. memmem \
  530. memset_s \
  531. mmap \
  532. pipe \
  533. pipe2 \
  534. prctl \
  535. readpassphrase \
  536. rint \
  537. sigaction \
  538. socketpair \
  539. statvfs \
  540. strncasecmp \
  541. strcasecmp \
  542. strlcat \
  543. strlcpy \
  544. strnlen \
  545. strptime \
  546. strtok_r \
  547. strtoull \
  548. sysconf \
  549. sysctl \
  550. truncate \
  551. uname \
  552. usleep \
  553. vasprintf \
  554. _vscprintf
  555. )
  556. # Apple messed up when they added some functions: they
  557. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  558. # checks.
  559. # We should only probe for these functions if we are sure that we
  560. # are not targeting OS X 10.9 or earlier.
  561. AC_MSG_CHECKING([for a pre-Yosemite OS X build target])
  562. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  563. #ifdef __APPLE__
  564. # include <AvailabilityMacros.h>
  565. # ifndef MAC_OS_X_VERSION_10_10
  566. # define MAC_OS_X_VERSION_10_10 101000
  567. # endif
  568. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  569. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
  570. # error "Running on Mac OS X 10.9 or earlier"
  571. # endif
  572. # endif
  573. #endif
  574. ]], [[]])],
  575. [on_macos_pre_10_10=no ; AC_MSG_RESULT([no])],
  576. [on_macos_pre_10_10=yes; AC_MSG_RESULT([yes])])
  577. if test "$on_macos_pre_10_10" = "no"; then
  578. AC_CHECK_FUNCS(
  579. mach_approximate_time \
  580. )
  581. fi
  582. # We should only probe for these functions if we are sure that we
  583. # are not targeting OSX 10.11 or earlier.
  584. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  585. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  586. #ifdef __APPLE__
  587. # include <AvailabilityMacros.h>
  588. # ifndef MAC_OS_X_VERSION_10_12
  589. # define MAC_OS_X_VERSION_10_12 101200
  590. # endif
  591. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  592. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  593. # error "Running on Mac OSX 10.11 or earlier"
  594. # endif
  595. # endif
  596. #endif
  597. ]], [[]])],
  598. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  599. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  600. if test "$on_macos_pre_10_12" = "no"; then
  601. AC_CHECK_FUNCS(
  602. clock_gettime \
  603. getentropy \
  604. )
  605. fi
  606. if test "$bwin32" != "true"; then
  607. AC_CHECK_HEADERS(pthread.h)
  608. AC_CHECK_FUNCS(pthread_create)
  609. AC_CHECK_FUNCS(pthread_condattr_setclock)
  610. fi
  611. if test "$bwin32" = "true"; then
  612. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  613. #include <windows.h>
  614. #include <conio.h>
  615. #include <wchar.h>
  616. ])
  617. fi
  618. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  619. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  620. AC_MSG_CHECKING([whether free(NULL) works])
  621. AC_RUN_IFELSE([AC_LANG_PROGRAM([
  622. #include <stdlib.h>
  623. ], [
  624. char *p = NULL;
  625. free(p);
  626. ])],
  627. [free_null_ok=true; AC_MSG_RESULT(yes)],
  628. [free_null_ok=false; AC_MSG_RESULT(no)],
  629. [free_null_ok=cross; AC_MSG_RESULT(cross)])
  630. if test "$free_null_ok" = "false"; then
  631. AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
  632. fi
  633. dnl ------------------------------------------------------
  634. dnl Where do you live, libevent? And how do we call you?
  635. if test "$bwin32" = "true"; then
  636. TOR_LIB_WS32=-lws2_32
  637. TOR_LIB_IPHLPAPI=-liphlpapi
  638. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  639. # think it's actually necessary.
  640. TOR_LIB_GDI=-lgdi32
  641. TOR_LIB_USERENV=-luserenv
  642. else
  643. TOR_LIB_WS32=
  644. TOR_LIB_GDI=
  645. TOR_LIB_USERENV=
  646. fi
  647. AC_SUBST(TOR_LIB_WS32)
  648. AC_SUBST(TOR_LIB_GDI)
  649. AC_SUBST(TOR_LIB_IPHLPAPI)
  650. AC_SUBST(TOR_LIB_USERENV)
  651. tor_libevent_pkg_redhat="libevent"
  652. tor_libevent_pkg_debian="libevent-dev"
  653. tor_libevent_devpkg_redhat="libevent-devel"
  654. tor_libevent_devpkg_debian="libevent-dev"
  655. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  656. dnl linking for static builds.
  657. STATIC_LIBEVENT_FLAGS=""
  658. if test "$enable_static_libevent" = "yes"; then
  659. if test "$have_rt" = "yes"; then
  660. STATIC_LIBEVENT_FLAGS=" -lrt "
  661. fi
  662. fi
  663. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  664. #ifdef _WIN32
  665. #include <winsock2.h>
  666. #endif
  667. #include <sys/time.h>
  668. #include <sys/types.h>
  669. #include <event2/event.h>], [
  670. #ifdef _WIN32
  671. #include <winsock2.h>
  672. #endif
  673. struct event_base;
  674. struct event_base *event_base_new(void);
  675. void event_base_free(struct event_base *);],
  676. [
  677. #ifdef _WIN32
  678. {WSADATA d; WSAStartup(0x101,&d); }
  679. #endif
  680. event_base_free(event_base_new());
  681. ], [--with-libevent-dir], [/opt/libevent])
  682. dnl Determine the incantation needed to link libevent.
  683. save_LIBS="$LIBS"
  684. save_LDFLAGS="$LDFLAGS"
  685. save_CPPFLAGS="$CPPFLAGS"
  686. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  687. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  688. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  689. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  690. if test "$enable_static_libevent" = "yes"; then
  691. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  692. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  693. else
  694. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  695. fi
  696. else
  697. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  698. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  699. 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"))
  700. if test "$ac_cv_search_event_new" != "none required"; then
  701. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  702. fi
  703. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  704. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  705. fi
  706. else
  707. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  708. fi
  709. fi
  710. dnl Now check for particular libevent functions.
  711. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  712. evutil_secure_rng_add_bytes \
  713. evdns_base_get_nameserver_addr \
  714. ])
  715. LIBS="$save_LIBS"
  716. LDFLAGS="$save_LDFLAGS"
  717. CPPFLAGS="$save_CPPFLAGS"
  718. dnl Check that libevent is at least at version 2.0.10, the first stable
  719. dnl release of its series
  720. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  721. AC_MSG_CHECKING([whether Libevent is new enough])
  722. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  723. #include <event2/event.h>
  724. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  725. #error
  726. int x = y(zz);
  727. #else
  728. int x = 1;
  729. #endif
  730. ])], [ AC_MSG_RESULT([yes]) ],
  731. [ AC_MSG_RESULT([no])
  732. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  733. LIBS="$save_LIBS"
  734. LDFLAGS="$save_LDFLAGS"
  735. CPPFLAGS="$save_CPPFLAGS"
  736. AC_SUBST(TOR_LIBEVENT_LIBS)
  737. dnl ------------------------------------------------------
  738. dnl Where do you live, libm?
  739. dnl On some platforms (Haiku/BeOS) the math library is
  740. dnl part of libroot. In which case don't link against lm
  741. TOR_LIB_MATH=""
  742. save_LIBS="$LIBS"
  743. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  744. if test "$ac_cv_search_pow" != "none required"; then
  745. TOR_LIB_MATH="$ac_cv_search_pow"
  746. fi
  747. LIBS="$save_LIBS"
  748. AC_SUBST(TOR_LIB_MATH)
  749. dnl ------------------------------------------------------
  750. dnl Hello, NSS. You're new around here.
  751. if test "x$enable_nss" = "xyes"; then
  752. PKG_CHECK_MODULES(NSS,
  753. [nss],
  754. [have_nss=yes],
  755. [have_nss=no; AC_MSG_ERROR([You asked for NSS but I can't find it.])])
  756. AC_SUBST(NSS_CFLAGS)
  757. AC_SUBST(NSS_LIBS)
  758. fi
  759. dnl ------------------------------------------------------
  760. dnl Where do you live, openssl? And how do we call you?
  761. if test "x$enable_nss" != "xyes"; then
  762. tor_openssl_pkg_redhat="openssl"
  763. tor_openssl_pkg_debian="libssl-dev"
  764. tor_openssl_devpkg_redhat="openssl-devel"
  765. tor_openssl_devpkg_debian="libssl-dev"
  766. ALT_openssl_WITHVAL=""
  767. AC_ARG_WITH(ssl-dir,
  768. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  769. [
  770. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  771. ALT_openssl_WITHVAL="$withval"
  772. fi
  773. ])
  774. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  775. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  776. [#include <openssl/ssl.h>
  777. char *getenv(const char *);],
  778. [struct ssl_cipher_st;
  779. unsigned SSL_CIPHER_get_id(const struct ssl_cipher_st *);
  780. char *getenv(const char *);],
  781. dnl This funny-looking test program calls getenv, so that the compiler
  782. dnl will neither make code that call SSL_CIPHER_get_id(NULL) [producing
  783. dnl a crash], nor optimize out the call to SSL_CIPHER_get_id().
  784. dnl We look for SSL_cipher_get_id() because it is present in
  785. dnl OpenSSL >=1.0.1, because it is not deprecated, and because Tor
  786. dnl depends on it.
  787. [if (getenv("THIS_SHOULDNT_BE_SET_X201803")) SSL_CIPHER_get_id((void *)0);], [],
  788. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  789. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  790. if test "$enable_static_openssl" = "yes"; then
  791. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  792. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  793. else
  794. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  795. fi
  796. else
  797. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  798. fi
  799. AC_SUBST(TOR_OPENSSL_LIBS)
  800. dnl Now check for particular openssl functions.
  801. save_LIBS="$LIBS"
  802. save_LDFLAGS="$LDFLAGS"
  803. save_CPPFLAGS="$CPPFLAGS"
  804. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  805. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  806. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  807. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  808. #include <openssl/opensslv.h>
  809. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  810. #error "too old"
  811. #endif
  812. ]], [[]])],
  813. [ : ],
  814. [ 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.]) ])
  815. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  816. #include <openssl/opensslv.h>
  817. #include <openssl/evp.h>
  818. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  819. #error "no ECC"
  820. #endif
  821. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  822. #error "curves unavailable"
  823. #endif
  824. ]], [[]])],
  825. [ : ],
  826. [ 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.]) ])
  827. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  828. [#include <openssl/ssl.h>
  829. ])
  830. AC_CHECK_FUNCS([ \
  831. ERR_load_KDF_strings \
  832. SSL_SESSION_get_master_key \
  833. SSL_get_server_random \
  834. SSL_get_client_ciphers \
  835. SSL_get_client_random \
  836. SSL_CTX_set1_groups_list \
  837. SSL_CIPHER_find \
  838. SSL_CTX_set_security_level \
  839. TLS_method
  840. ])
  841. dnl Check if OpenSSL has scrypt implementation.
  842. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  843. dnl Check if OpenSSL structures are opaque
  844. AC_CHECK_MEMBERS([SSL.state], , ,
  845. [#include <openssl/ssl.h>
  846. ])
  847. AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
  848. #include <openssl/sha.h>
  849. ])
  850. fi # enable_nss
  851. dnl ======================================================================
  852. dnl Can we use KIST?
  853. dnl Define the set of checks for KIST scheduler support.
  854. AC_DEFUN([CHECK_KIST_SUPPORT],[
  855. dnl KIST needs struct tcp_info and for certain members to exist.
  856. AC_CHECK_MEMBERS(
  857. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  858. , ,[[#include <netinet/tcp.h>]])
  859. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  860. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  861. #include <linux/sockios.h>
  862. #ifndef SIOCOUTQNSD
  863. #error
  864. #endif
  865. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  866. if test "x$have_siocoutqnsd" = "xyes"; then
  867. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  868. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  869. have_kist_support=yes
  870. fi
  871. fi
  872. fi
  873. ])
  874. dnl Now, trigger the check.
  875. CHECK_KIST_SUPPORT
  876. AS_IF([test "x$have_kist_support" = "xyes"],
  877. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  878. on this system])],
  879. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  880. LIBS="$save_LIBS"
  881. LDFLAGS="$save_LDFLAGS"
  882. CPPFLAGS="$save_CPPFLAGS"
  883. dnl ------------------------------------------------------
  884. dnl Where do you live, zlib? And how do we call you?
  885. tor_zlib_pkg_redhat="zlib"
  886. tor_zlib_pkg_debian="zlib1g"
  887. tor_zlib_devpkg_redhat="zlib-devel"
  888. tor_zlib_devpkg_debian="zlib1g-dev"
  889. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  890. [#include <zlib.h>],
  891. [const char * zlibVersion(void);],
  892. [zlibVersion();], [--with-zlib-dir],
  893. [/opt/zlib])
  894. if test "$enable_static_zlib" = "yes"; then
  895. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  896. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  897. using --enable-static-zlib")
  898. else
  899. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  900. fi
  901. else
  902. TOR_ZLIB_LIBS="-lz"
  903. fi
  904. AC_SUBST(TOR_ZLIB_LIBS)
  905. dnl ------------------------------------------------------
  906. dnl Where we do we find lzma?
  907. AC_ARG_ENABLE(lzma,
  908. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  909. [case "${enableval}" in
  910. "yes") lzma=true ;;
  911. "no") lzma=false ;;
  912. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  913. esac], [lzma=auto])
  914. if test "x$enable_lzma" = "xno"; then
  915. have_lzma=no;
  916. else
  917. PKG_CHECK_MODULES([LZMA],
  918. [liblzma],
  919. have_lzma=yes,
  920. have_lzma=no)
  921. if test "x$have_lzma" = "xno" ; then
  922. AC_MSG_WARN([Unable to find liblzma.])
  923. fi
  924. fi
  925. if test "x$have_lzma" = "xyes"; then
  926. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  927. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  928. TOR_LZMA_LIBS="${LZMA_LIBS}"
  929. fi
  930. AC_SUBST(TOR_LZMA_CFLAGS)
  931. AC_SUBST(TOR_LZMA_LIBS)
  932. dnl ------------------------------------------------------
  933. dnl Where we do we find zstd?
  934. AC_ARG_ENABLE(zstd,
  935. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  936. [case "${enableval}" in
  937. "yes") zstd=true ;;
  938. "no") zstd=false ;;
  939. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  940. esac], [zstd=auto])
  941. if test "x$enable_zstd" = "xno"; then
  942. have_zstd=no;
  943. else
  944. PKG_CHECK_MODULES([ZSTD],
  945. [libzstd >= 1.1],
  946. have_zstd=yes,
  947. have_zstd=no)
  948. if test "x$have_zstd" = "xno" ; then
  949. AC_MSG_WARN([Unable to find libzstd.])
  950. fi
  951. fi
  952. if test "x$have_zstd" = "xyes"; then
  953. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  954. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  955. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  956. dnl now check for zstd functions
  957. save_LIBS="$LIBS"
  958. save_CFLAGS="$CFLAGS"
  959. LIBS="$LIBS $ZSTD_LIBS"
  960. CFLAGS="$CFLAGS $ZSTD_CFLAGS"
  961. AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
  962. ZSTD_estimateDCtxSize)
  963. LIBS="$save_LIBS"
  964. CFLAGS="$save_CFLAGS"
  965. fi
  966. AC_SUBST(TOR_ZSTD_CFLAGS)
  967. AC_SUBST(TOR_ZSTD_LIBS)
  968. dnl ----------------------------------------------------------------------
  969. dnl Check if libcap is available for capabilities.
  970. tor_cap_pkg_debian="libcap2"
  971. tor_cap_pkg_redhat="libcap"
  972. tor_cap_devpkg_debian="libcap-dev"
  973. tor_cap_devpkg_redhat="libcap-devel"
  974. AC_CHECK_LIB([cap], [cap_init], [],
  975. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  976. )
  977. AC_CHECK_FUNCS(cap_set_proc)
  978. dnl ---------------------------------------------------------------------
  979. dnl Now that we know about our major libraries, we can check for compiler
  980. dnl and linker hardening options. We need to do this with the libraries known,
  981. dnl since sometimes the linker will like an option but not be willing to
  982. dnl use it with a build of a library.
  983. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  984. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  985. CFLAGS_FTRAPV=
  986. CFLAGS_FWRAPV=
  987. CFLAGS_ASAN=
  988. CFLAGS_UBSAN=
  989. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  990. #if !defined(__clang__)
  991. #error
  992. #endif])], have_clang=yes, have_clang=no)
  993. if test "x$enable_pic" = "xyes"; then
  994. TOR_CHECK_CFLAGS(-fPIC)
  995. fi
  996. if test "x$enable_gcc_hardening" != "xno"; then
  997. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  998. if test "x$have_clang" = "xyes"; then
  999. TOR_CHECK_CFLAGS(-Qunused-arguments)
  1000. fi
  1001. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  1002. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  1003. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  1004. m4_ifdef([AS_VAR_IF],[
  1005. AS_VAR_IF(can_compile, [yes],
  1006. AS_VAR_IF(can_link, [yes],
  1007. [],
  1008. AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
  1009. )])
  1010. AS_VAR_POPDEF([can_link])
  1011. AS_VAR_POPDEF([can_compile])
  1012. TOR_CHECK_CFLAGS(-Wstack-protector)
  1013. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  1014. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  1015. if test "$enable_pic" != "yes"; then
  1016. # If we have already enabled -fPIC, then we don't also need to
  1017. # compile with -fPIE...
  1018. TOR_CHECK_CFLAGS(-fPIE)
  1019. fi
  1020. # ... but we want to link our executables with -pie in any case, since
  1021. # they're executables, not a library.
  1022. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  1023. fi
  1024. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  1025. fi
  1026. if test "$fragile_hardening" = "yes"; then
  1027. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  1028. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  1029. 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.])
  1030. fi
  1031. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  1032. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  1033. fi
  1034. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  1035. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1036. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  1037. fi
  1038. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  1039. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1040. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  1041. fi
  1042. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  1043. fi
  1044. dnl Find the correct libraries to add in order to use the sanitizers.
  1045. dnl
  1046. dnl When building Rust, Cargo will run the linker with the -nodefaultlibs
  1047. dnl option, which will prevent the compiler from linking the sanitizer
  1048. dnl libraries it needs. We need to specify them manually.
  1049. dnl
  1050. dnl What's more, we need to specify them in a linker script rather than
  1051. dnl from build.rs: these options aren't allowed in the cargo:rustc-flags
  1052. dnl variable.
  1053. RUST_LINKER_OPTIONS=""
  1054. if test "x$have_clang" = "xyes"; then
  1055. if test "x$CFLAGS_ASAN" != "x"; then
  1056. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_ASAN -Cdefault-linker-libraries"
  1057. fi
  1058. if test "x$CFLAGS_UBSAN" != "x"; then
  1059. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_UBSAN -Cdefault-linker-libraries"
  1060. fi
  1061. else
  1062. if test "x$CFLAGS_ASAN" != "x"; then
  1063. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=address -Cdefault-linker-libraries"
  1064. fi
  1065. if test "x$CFLAGS_UBSAN" != "x"; then
  1066. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=undefined -Cdefault-linker-libraries"
  1067. fi
  1068. fi
  1069. AC_SUBST(RUST_LINKER_OPTIONS)
  1070. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  1071. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  1072. mulodi_fixes_ftrapv=no
  1073. if test "$have_clang" = "yes"; then
  1074. saved_CFLAGS="$CFLAGS"
  1075. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  1076. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  1077. AC_LINK_IFELSE([
  1078. AC_LANG_SOURCE([[
  1079. #include <stdint.h>
  1080. #include <stdlib.h>
  1081. int main(int argc, char **argv)
  1082. {
  1083. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1084. * (int64_t)atoi(argv[3]);
  1085. return x == 9;
  1086. } ]])],
  1087. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  1088. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  1089. if test "$ftrapv_can_link" = "no"; then
  1090. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  1091. AC_LINK_IFELSE([
  1092. AC_LANG_SOURCE([[
  1093. #include <stdint.h>
  1094. #include <stdlib.h>
  1095. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  1096. *overflow=0;
  1097. return a;
  1098. }
  1099. int main(int argc, char **argv)
  1100. {
  1101. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1102. * (int64_t)atoi(argv[3]);
  1103. return x == 9;
  1104. } ]])],
  1105. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  1106. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  1107. fi
  1108. CFLAGS="$saved_CFLAGS"
  1109. fi
  1110. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  1111. dnl These cflags add bunches of branches, and we haven't been able to
  1112. dnl persuade ourselves that they're suitable for code that needs to be
  1113. dnl constant time.
  1114. AC_SUBST(CFLAGS_BUGTRAP)
  1115. dnl These cflags are variant ones sutable for code that needs to be
  1116. dnl constant-time.
  1117. AC_SUBST(CFLAGS_CONSTTIME)
  1118. if test "x$enable_linker_hardening" != "xno"; then
  1119. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  1120. fi
  1121. # For backtrace support
  1122. TOR_CHECK_LDFLAGS(-rdynamic)
  1123. dnl ------------------------------------------------------
  1124. dnl Now see if we have a -fomit-frame-pointer compiler option.
  1125. saved_CFLAGS="$CFLAGS"
  1126. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  1127. F_OMIT_FRAME_POINTER=''
  1128. if test "$saved_CFLAGS" != "$CFLAGS"; then
  1129. if test "$fragile_hardening" = "yes"; then
  1130. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  1131. fi
  1132. fi
  1133. CFLAGS="$saved_CFLAGS"
  1134. AC_SUBST(F_OMIT_FRAME_POINTER)
  1135. dnl ------------------------------------------------------
  1136. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  1137. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  1138. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  1139. dnl code will work.
  1140. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  1141. dnl ============================================================
  1142. dnl Check for libseccomp
  1143. if test "x$enable_seccomp" != "xno"; then
  1144. AC_CHECK_HEADERS([seccomp.h])
  1145. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  1146. fi
  1147. dnl ============================================================
  1148. dnl Check for libscrypt
  1149. if test "x$enable_libscrypt" != "xno"; then
  1150. AC_CHECK_HEADERS([libscrypt.h])
  1151. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  1152. AC_CHECK_FUNCS([libscrypt_scrypt])
  1153. fi
  1154. dnl ============================================================
  1155. dnl We need an implementation of curve25519.
  1156. dnl set these defaults.
  1157. build_curve25519_donna=no
  1158. build_curve25519_donna_c64=no
  1159. use_curve25519_donna=no
  1160. use_curve25519_nacl=no
  1161. CURVE25519_LIBS=
  1162. dnl The best choice is using curve25519-donna-c64, but that requires
  1163. dnl that we
  1164. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  1165. tor_cv_can_use_curve25519_donna_c64,
  1166. [AC_RUN_IFELSE(
  1167. [AC_LANG_PROGRAM([dnl
  1168. #include <stdint.h>
  1169. typedef unsigned uint128_t __attribute__((mode(TI)));
  1170. int func(uint64_t a, uint64_t b) {
  1171. uint128_t c = ((uint128_t)a) * b;
  1172. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1173. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1174. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1175. (((uint64_t)(c))&0xffffffffL) == 0;
  1176. return ok;
  1177. }
  1178. ], [dnl
  1179. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1180. ((uint64_t)1234567890) << 24);
  1181. return !ok;
  1182. ])],
  1183. [tor_cv_can_use_curve25519_donna_c64=yes],
  1184. [tor_cv_can_use_curve25519_donna_c64=no],
  1185. [AC_LINK_IFELSE(
  1186. [AC_LANG_PROGRAM([dnl
  1187. #include <stdint.h>
  1188. typedef unsigned uint128_t __attribute__((mode(TI)));
  1189. int func(uint64_t a, uint64_t b) {
  1190. uint128_t c = ((uint128_t)a) * b;
  1191. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1192. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1193. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1194. (((uint64_t)(c))&0xffffffffL) == 0;
  1195. return ok;
  1196. }
  1197. ], [dnl
  1198. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1199. ((uint64_t)1234567890) << 24);
  1200. return !ok;
  1201. ])],
  1202. [tor_cv_can_use_curve25519_donna_c64=cross],
  1203. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1204. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1205. nacl/crypto_scalarmult_curve25519.h])
  1206. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1207. tor_cv_can_use_curve25519_nacl,
  1208. [tor_saved_LIBS="$LIBS"
  1209. LIBS="$LIBS -lnacl"
  1210. AC_LINK_IFELSE(
  1211. [AC_LANG_PROGRAM([dnl
  1212. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1213. #include <crypto_scalarmult_curve25519.h>
  1214. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1215. #include <nacl/crypto_scalarmult_curve25519.h>
  1216. #endif
  1217. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1218. #error Hey, this is the reference implementation! That's not fast.
  1219. #endif
  1220. ], [
  1221. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1222. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1223. [tor_cv_can_use_curve25519_nacl=no])
  1224. LIBS="$tor_saved_LIBS" ])
  1225. dnl Okay, now we need to figure out which one to actually use. Fall back
  1226. dnl to curve25519-donna.c
  1227. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1228. build_curve25519_donna_c64=yes
  1229. use_curve25519_donna=yes
  1230. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1231. use_curve25519_nacl=yes
  1232. CURVE25519_LIBS=-lnacl
  1233. else
  1234. build_curve25519_donna=yes
  1235. use_curve25519_donna=yes
  1236. fi
  1237. if test "x$use_curve25519_donna" = "xyes"; then
  1238. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1239. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1240. fi
  1241. if test "x$use_curve25519_nacl" = "xyes"; then
  1242. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1243. [Defined if we should use a curve25519 from nacl])
  1244. fi
  1245. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1246. test "x$build_curve25519_donna" = "xyes")
  1247. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1248. test "x$build_curve25519_donna_c64" = "xyes")
  1249. AC_SUBST(CURVE25519_LIBS)
  1250. dnl Make sure to enable support for large off_t if available.
  1251. AC_SYS_LARGEFILE
  1252. AC_CHECK_HEADERS([errno.h \
  1253. fcntl.h \
  1254. signal.h \
  1255. string.h \
  1256. sys/capability.h \
  1257. sys/fcntl.h \
  1258. sys/stat.h \
  1259. sys/time.h \
  1260. sys/types.h \
  1261. time.h \
  1262. unistd.h \
  1263. arpa/inet.h \
  1264. crt_externs.h \
  1265. execinfo.h \
  1266. gnu/libc-version.h \
  1267. grp.h \
  1268. ifaddrs.h \
  1269. inttypes.h \
  1270. limits.h \
  1271. linux/types.h \
  1272. machine/limits.h \
  1273. malloc.h \
  1274. malloc/malloc.h \
  1275. malloc_np.h \
  1276. netdb.h \
  1277. netinet/in.h \
  1278. netinet/in6.h \
  1279. pwd.h \
  1280. readpassphrase.h \
  1281. stdatomic.h \
  1282. sys/eventfd.h \
  1283. sys/file.h \
  1284. sys/ioctl.h \
  1285. sys/limits.h \
  1286. sys/mman.h \
  1287. sys/param.h \
  1288. sys/prctl.h \
  1289. sys/random.h \
  1290. sys/resource.h \
  1291. sys/select.h \
  1292. sys/socket.h \
  1293. sys/statvfs.h \
  1294. sys/syscall.h \
  1295. sys/sysctl.h \
  1296. sys/syslimits.h \
  1297. sys/time.h \
  1298. sys/types.h \
  1299. sys/un.h \
  1300. sys/utime.h \
  1301. sys/wait.h \
  1302. syslog.h \
  1303. utime.h])
  1304. AC_CHECK_HEADERS(sys/param.h)
  1305. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1306. [#ifdef HAVE_SYS_TYPES_H
  1307. #include <sys/types.h>
  1308. #endif
  1309. #ifdef HAVE_SYS_SOCKET_H
  1310. #include <sys/socket.h>
  1311. #endif])
  1312. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1313. [#ifdef HAVE_SYS_TYPES_H
  1314. #include <sys/types.h>
  1315. #endif
  1316. #ifdef HAVE_SYS_SOCKET_H
  1317. #include <sys/socket.h>
  1318. #endif
  1319. #ifdef HAVE_NET_IF_H
  1320. #include <net/if.h>
  1321. #endif
  1322. #ifdef HAVE_NETINET_IN_H
  1323. #include <netinet/in.h>
  1324. #endif])
  1325. AC_CHECK_HEADERS(linux/if.h,[],[],
  1326. [
  1327. #ifdef HAVE_SYS_SOCKET_H
  1328. #include <sys/socket.h>
  1329. #endif
  1330. ])
  1331. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1332. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1333. [#ifdef HAVE_SYS_TYPES_H
  1334. #include <sys/types.h>
  1335. #endif
  1336. #ifdef HAVE_SYS_SOCKET_H
  1337. #include <sys/socket.h>
  1338. #endif
  1339. #ifdef HAVE_LIMITS_H
  1340. #include <limits.h>
  1341. #endif
  1342. #ifdef HAVE_LINUX_TYPES_H
  1343. #include <linux/types.h>
  1344. #endif
  1345. #ifdef HAVE_NETINET_IN6_H
  1346. #include <netinet/in6.h>
  1347. #endif
  1348. #ifdef HAVE_NETINET_IN_H
  1349. #include <netinet/in.h>
  1350. #endif])
  1351. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1352. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1353. [#ifdef HAVE_SYS_TYPES_H
  1354. #include <sys/types.h>
  1355. #endif
  1356. #ifdef HAVE_SYS_SOCKET_H
  1357. #include <sys/socket.h>
  1358. #endif
  1359. #ifdef HAVE_LIMITS_H
  1360. #include <limits.h>
  1361. #endif
  1362. #ifdef HAVE_LINUX_TYPES_H
  1363. #include <linux/types.h>
  1364. #endif
  1365. #ifdef HAVE_NETINET_IN6_H
  1366. #include <netinet/in6.h>
  1367. #endif
  1368. #ifdef HAVE_NETINET_IN_H
  1369. #include <netinet/in.h>
  1370. #endif
  1371. #ifdef HAVE_LINUX_IF_H
  1372. #include <linux/if.h>
  1373. #endif])
  1374. transparent_ok=0
  1375. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1376. transparent_ok=1
  1377. fi
  1378. if test "x$linux_netfilter_ipv4" = "x1"; then
  1379. transparent_ok=1
  1380. fi
  1381. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1382. transparent_ok=1
  1383. fi
  1384. if test "x$transparent_ok" = "x1"; then
  1385. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1386. else
  1387. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1388. fi
  1389. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1390. [#ifdef HAVE_SYS_TYPES_H
  1391. #include <sys/types.h>
  1392. #endif
  1393. #ifdef HAVE_SYS_TIME_H
  1394. #include <sys/time.h>
  1395. #endif])
  1396. AC_CHECK_SIZEOF(char)
  1397. AC_CHECK_SIZEOF(short)
  1398. AC_CHECK_SIZEOF(int)
  1399. AC_CHECK_SIZEOF(long)
  1400. AC_CHECK_SIZEOF(long long)
  1401. AC_CHECK_SIZEOF(__int64)
  1402. AC_CHECK_SIZEOF(void *)
  1403. AC_CHECK_SIZEOF(time_t)
  1404. AC_CHECK_SIZEOF(size_t)
  1405. AC_CHECK_SIZEOF(pid_t)
  1406. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1407. AC_PC_FROM_UCONTEXT([:])
  1408. dnl used to include sockaddr_storage, but everybody has that.
  1409. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1410. [#ifdef HAVE_SYS_TYPES_H
  1411. #include <sys/types.h>
  1412. #endif
  1413. #ifdef HAVE_NETINET_IN_H
  1414. #include <netinet/in.h>
  1415. #endif
  1416. #ifdef HAVE_NETINET_IN6_H
  1417. #include <netinet/in6.h>
  1418. #endif
  1419. #ifdef HAVE_SYS_SOCKET_H
  1420. #include <sys/socket.h>
  1421. #endif
  1422. #ifdef _WIN32
  1423. #define _WIN32_WINNT 0x0501
  1424. #define WIN32_LEAN_AND_MEAN
  1425. #include <winsock2.h>
  1426. #include <ws2tcpip.h>
  1427. #endif
  1428. ])
  1429. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1430. [#ifdef HAVE_SYS_TYPES_H
  1431. #include <sys/types.h>
  1432. #endif
  1433. #ifdef HAVE_NETINET_IN_H
  1434. #include <netinet/in.h>
  1435. #endif
  1436. #ifdef HAVE_NETINET_IN6_H
  1437. #include <netinet/in6.h>
  1438. #endif
  1439. #ifdef HAVE_SYS_SOCKET_H
  1440. #include <sys/socket.h>
  1441. #endif
  1442. #ifdef _WIN32
  1443. #define _WIN32_WINNT 0x0501
  1444. #define WIN32_LEAN_AND_MEAN
  1445. #include <winsock2.h>
  1446. #include <ws2tcpip.h>
  1447. #endif
  1448. ])
  1449. AC_CHECK_TYPES([rlim_t], , ,
  1450. [#ifdef HAVE_SYS_TYPES_H
  1451. #include <sys/types.h>
  1452. #endif
  1453. #ifdef HAVE_SYS_TIME_H
  1454. #include <sys/time.h>
  1455. #endif
  1456. #ifdef HAVE_SYS_RESOURCE_H
  1457. #include <sys/resource.h>
  1458. #endif
  1459. ])
  1460. AX_CHECK_SIGN([time_t],
  1461. [ : ],
  1462. [ : ], [
  1463. #ifdef HAVE_SYS_TYPES_H
  1464. #include <sys/types.h>
  1465. #endif
  1466. #ifdef HAVE_SYS_TIME_H
  1467. #include <sys/time.h>
  1468. #endif
  1469. #ifdef HAVE_TIME_H
  1470. #include <time.h>
  1471. #endif
  1472. ])
  1473. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1474. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1475. fi
  1476. AX_CHECK_SIGN([size_t],
  1477. [ tor_cv_size_t_signed=yes ],
  1478. [ tor_cv_size_t_signed=no ], [
  1479. #ifdef HAVE_SYS_TYPES_H
  1480. #include <sys/types.h>
  1481. #endif
  1482. ])
  1483. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1484. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1485. fi
  1486. AX_CHECK_SIGN([enum always],
  1487. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1488. [ : ], [
  1489. enum always { AAA, BBB, CCC };
  1490. ])
  1491. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1492. #ifdef HAVE_SYS_SOCKET_H
  1493. #include <sys/socket.h>
  1494. #endif
  1495. ])
  1496. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1497. AC_CHECK_SIZEOF(cell_t)
  1498. # Let's see if stdatomic works. (There are some debian clangs that screw it
  1499. # up; see Tor bug #26779 and debian bug 903709.)
  1500. AC_CACHE_CHECK([whether C11 stdatomic.h actually works],
  1501. tor_cv_stdatomic_works,
  1502. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1503. #include <stdatomic.h>
  1504. struct x { atomic_size_t y; };
  1505. void try_atomic_init(struct x *xx)
  1506. {
  1507. atomic_init(&xx->y, 99);
  1508. atomic_fetch_add(&xx->y, 1);
  1509. }
  1510. ]])], [tor_cv_stdatomic_works=yes], [tor_cv_stdatomic_works=no])])
  1511. if test "$tor_cv_stdatomic_works" = "yes"; then
  1512. AC_DEFINE(STDATOMIC_WORKS, 1, [Set to 1 if we can compile a simple stdatomic example.])
  1513. elif test "$ac_cv_header_stdatomic_h" = "yes"; then
  1514. 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 ])
  1515. fi
  1516. # Now make sure that NULL can be represented as zero bytes.
  1517. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1518. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1519. [[#include <stdlib.h>
  1520. #include <string.h>
  1521. #include <stdio.h>
  1522. #ifdef HAVE_STDDEF_H
  1523. #include <stddef.h>
  1524. #endif
  1525. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1526. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1527. [tor_cv_null_is_zero=yes],
  1528. [tor_cv_null_is_zero=no],
  1529. [tor_cv_null_is_zero=cross])])
  1530. if test "$tor_cv_null_is_zero" = "cross"; then
  1531. # Cross-compiling; let's hope that the target isn't raving mad.
  1532. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1533. fi
  1534. if test "$tor_cv_null_is_zero" != "no"; then
  1535. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1536. [Define to 1 iff memset(0) sets pointers to NULL])
  1537. fi
  1538. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1539. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1540. [[#include <stdlib.h>
  1541. #include <string.h>
  1542. #include <stdio.h>
  1543. #ifdef HAVE_STDDEF_H
  1544. #include <stddef.h>
  1545. #endif
  1546. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1547. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1548. [tor_cv_dbl0_is_zero=yes],
  1549. [tor_cv_dbl0_is_zero=no],
  1550. [tor_cv_dbl0_is_zero=cross])])
  1551. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1552. # Cross-compiling; let's hope that the target isn't raving mad.
  1553. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1554. fi
  1555. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1556. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1557. [Define to 1 iff memset(0) sets doubles to 0.0])
  1558. fi
  1559. # And what happens when we malloc zero?
  1560. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1561. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1562. [[#include <stdlib.h>
  1563. #include <string.h>
  1564. #include <stdio.h>
  1565. #ifdef HAVE_STDDEF_H
  1566. #include <stddef.h>
  1567. #endif
  1568. int main () { return malloc(0)?0:1; }]])],
  1569. [tor_cv_malloc_zero_works=yes],
  1570. [tor_cv_malloc_zero_works=no],
  1571. [tor_cv_malloc_zero_works=cross])])
  1572. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1573. # Cross-compiling; let's hope that the target isn't raving mad.
  1574. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1575. fi
  1576. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1577. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1578. [Define to 1 iff malloc(0) returns a pointer])
  1579. fi
  1580. # whether we seem to be in a 2s-complement world.
  1581. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1582. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1583. [[int main () { int problem = ((-99) != (~99)+1);
  1584. return problem ? 1 : 0; }]])],
  1585. [tor_cv_twos_complement=yes],
  1586. [tor_cv_twos_complement=no],
  1587. [tor_cv_twos_complement=cross])])
  1588. if test "$tor_cv_twos_complement" = "cross"; then
  1589. # Cross-compiling; let's hope that the target isn't raving mad.
  1590. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1591. fi
  1592. if test "$tor_cv_twos_complement" != "no"; then
  1593. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1594. [Define to 1 iff we represent negative integers with
  1595. two's complement])
  1596. fi
  1597. # What does shifting a negative value do?
  1598. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1599. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1600. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1601. [tor_cv_sign_extend=yes],
  1602. [tor_cv_sign_extend=no],
  1603. [tor_cv_sign_extend=cross])])
  1604. if test "$tor_cv_sign_extend" = "cross"; then
  1605. # Cross-compiling; let's hope that the target isn't raving mad.
  1606. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1607. fi
  1608. if test "$tor_cv_sign_extend" != "no"; then
  1609. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1610. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1611. fi
  1612. # Is uint8_t the same type as unsigned char?
  1613. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1614. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1615. #include <stdint.h>
  1616. extern uint8_t c;
  1617. unsigned char c;]])],
  1618. [tor_cv_uint8_uchar=yes],
  1619. [tor_cv_uint8_uchar=no],
  1620. [tor_cv_uint8_uchar=cross])])
  1621. if test "$tor_cv_uint8_uchar" = "cross"; then
  1622. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1623. fi
  1624. if test "$tor_cv_uint8_uchar" = "no"; then
  1625. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1626. fi
  1627. AC_ARG_WITH(tcmalloc,
  1628. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library. Deprecated; see --with-malloc]),
  1629. [ tcmalloc=yes ], [ tcmalloc=no ])
  1630. default_malloc=system
  1631. if test "x$enable_openbsd_malloc" = "xyes" ; then
  1632. AC_MSG_NOTICE([The --enable-openbsd-malloc argument is deprecated; use --with-malloc=openbsd instead.])
  1633. default_malloc=openbsd
  1634. fi
  1635. if test "x$tcmalloc" = "xyes"; then
  1636. AC_MSG_NOTICE([The --with-tcmalloc argument is deprecated; use --with-malloc=tcmalloc instead.])
  1637. default_malloc=tcmalloc
  1638. fi
  1639. AC_ARG_WITH(malloc,
  1640. AS_HELP_STRING([--with-malloc=[system,jemalloc,tcmalloc,openbsd]],
  1641. [select special malloc implementation [system]]),
  1642. [ malloc="$with_malloc" ], [ malloc="$default_malloc" ])
  1643. AS_CASE([$malloc],
  1644. [tcmalloc], [
  1645. PKG_CHECK_MODULES([TCMALLOC],
  1646. [libtcmalloc],
  1647. have_tcmalloc=yes,
  1648. have_tcmalloc=no)
  1649. if test "x$have_tcmalloc" = "xno" ; then
  1650. AC_MSG_ERROR([Unable to find tcmalloc requested by --with-malloc.])
  1651. fi
  1652. CFLAGS="$CFLAGS $TCMALLOC_CFLAGS"
  1653. LIBS="$TCMALLOC_LIBS $LIBS"
  1654. ],
  1655. [jemalloc], [
  1656. PKG_CHECK_MODULES([JEMALLOC],
  1657. [jemalloc],
  1658. have_jemalloc=yes,
  1659. have_jemalloc=no)
  1660. if test "x$have_tcmalloc" = "xno" ; then
  1661. AC_MSG_ERROR([Unable to find jemalloc requested by --with-malloc.])
  1662. fi
  1663. CFLAGS="$CFLAGS $JEMALLOC_CFLAGS"
  1664. LIBS="$JEMALLOC_LIBS $LIBS"
  1665. using_custom_malloc=yes
  1666. ],
  1667. [openbsd], [
  1668. AC_MSG_WARN([The openbsd malloc port is deprecated in Tor 0.3.5 and will be removed in a future version.])
  1669. enable_openbsd_malloc=yes
  1670. ],
  1671. [system], [
  1672. # handle this later, including the jemalloc fallback
  1673. AC_CHECK_FUNCS(mallinfo)
  1674. ],
  1675. [AC_MSG_ERROR([--with-malloc=`$with_malloc' not supported, see --help])
  1676. ])
  1677. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  1678. if test "$malloc" != "system"; then
  1679. # Tell the C compiler not to use the system allocator functions.
  1680. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1681. fi
  1682. if test "$using_custom_malloc" = "yes"; then
  1683. # Tell the C compiler not to use the system allocator functions.
  1684. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1685. fi
  1686. # By default, we're going to assume we don't have mlockall()
  1687. # bionic and other platforms have various broken mlockall subsystems.
  1688. # Some systems don't have a working mlockall, some aren't linkable,
  1689. # and some have it but don't declare it.
  1690. AC_CHECK_FUNCS(mlockall)
  1691. AC_CHECK_DECLS([mlockall], , , [
  1692. #ifdef HAVE_SYS_MMAN_H
  1693. #include <sys/mman.h>
  1694. #endif])
  1695. # Allow user to specify an alternate syslog facility
  1696. AC_ARG_WITH(syslog-facility,
  1697. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1698. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1699. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1700. AC_SUBST(LOGFACILITY)
  1701. # Check if we have getresuid and getresgid
  1702. AC_CHECK_FUNCS(getresuid getresgid)
  1703. # Check for gethostbyname_r in all its glorious incompatible versions.
  1704. # (This logic is based on that in Python's configure.in)
  1705. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1706. [Define this if you have any gethostbyname_r()])
  1707. AC_CHECK_FUNC(gethostbyname_r, [
  1708. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1709. OLD_CFLAGS=$CFLAGS
  1710. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1711. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1712. #include <netdb.h>
  1713. ]], [[
  1714. char *cp1, *cp2;
  1715. struct hostent *h1, *h2;
  1716. int i1, i2;
  1717. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1718. ]])],[
  1719. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1720. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1721. [Define this if gethostbyname_r takes 6 arguments])
  1722. AC_MSG_RESULT(6)
  1723. ], [
  1724. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1725. #include <netdb.h>
  1726. ]], [[
  1727. char *cp1, *cp2;
  1728. struct hostent *h1;
  1729. int i1, i2;
  1730. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1731. ]])], [
  1732. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1733. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1734. [Define this if gethostbyname_r takes 5 arguments])
  1735. AC_MSG_RESULT(5)
  1736. ], [
  1737. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1738. #include <netdb.h>
  1739. ]], [[
  1740. char *cp1;
  1741. struct hostent *h1;
  1742. struct hostent_data hd;
  1743. (void) gethostbyname_r(cp1,h1,&hd);
  1744. ]])], [
  1745. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1746. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1747. [Define this if gethostbyname_r takes 3 arguments])
  1748. AC_MSG_RESULT(3)
  1749. ], [
  1750. AC_MSG_RESULT(0)
  1751. ])
  1752. ])
  1753. ])
  1754. CFLAGS=$OLD_CFLAGS
  1755. ])
  1756. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1757. tor_cv_have_func_macro,
  1758. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1759. #include <stdio.h>
  1760. int main(int c, char **v) { puts(__func__); }])],
  1761. tor_cv_have_func_macro=yes,
  1762. tor_cv_have_func_macro=no))
  1763. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1764. tor_cv_have_FUNC_macro,
  1765. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1766. #include <stdio.h>
  1767. int main(int c, char **v) { puts(__FUNC__); }])],
  1768. tor_cv_have_FUNC_macro=yes,
  1769. tor_cv_have_FUNC_macro=no))
  1770. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1771. tor_cv_have_FUNCTION_macro,
  1772. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1773. #include <stdio.h>
  1774. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1775. tor_cv_have_FUNCTION_macro=yes,
  1776. tor_cv_have_FUNCTION_macro=no))
  1777. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1778. tor_cv_have_environ_declared,
  1779. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1780. #ifdef HAVE_UNISTD_H
  1781. #include <unistd.h>
  1782. #endif
  1783. #include <stdlib.h>
  1784. int main(int c, char **v) { char **t = environ; }])],
  1785. tor_cv_have_environ_declared=yes,
  1786. tor_cv_have_environ_declared=no))
  1787. if test "$tor_cv_have_func_macro" = "yes"; then
  1788. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1789. fi
  1790. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1791. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1792. fi
  1793. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1794. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1795. [Defined if the compiler supports __FUNCTION__])
  1796. fi
  1797. if test "$tor_cv_have_environ_declared" = "yes"; then
  1798. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1799. [Defined if we have extern char **environ already declared])
  1800. fi
  1801. # $prefix stores the value of the --prefix command line option, or
  1802. # NONE if the option wasn't set. In the case that it wasn't set, make
  1803. # it be the default, so that we can use it to expand directories now.
  1804. if test "x$prefix" = "xNONE"; then
  1805. prefix=$ac_default_prefix
  1806. fi
  1807. # and similarly for $exec_prefix
  1808. if test "x$exec_prefix" = "xNONE"; then
  1809. exec_prefix=$prefix
  1810. fi
  1811. if test "x$BUILDDIR" = "x"; then
  1812. BUILDDIR=`pwd`
  1813. fi
  1814. AC_SUBST(BUILDDIR)
  1815. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1816. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1817. if test "x$SRCDIR" = "x"; then
  1818. SRCDIR=$(cd "$srcdir"; pwd)
  1819. fi
  1820. AH_TEMPLATE([SRCDIR],[tor's sourcedir directory])
  1821. AC_DEFINE_UNQUOTED(SRCDIR,"$SRCDIR")
  1822. if test "x$CONFDIR" = "x"; then
  1823. CONFDIR=`eval echo $sysconfdir/tor`
  1824. fi
  1825. AC_SUBST(CONFDIR)
  1826. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1827. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1828. BINDIR=`eval echo $bindir`
  1829. AC_SUBST(BINDIR)
  1830. LOCALSTATEDIR=`eval echo $localstatedir`
  1831. AC_SUBST(LOCALSTATEDIR)
  1832. if test "$bwin32" = "true"; then
  1833. # Test if the linker supports the --nxcompat and --dynamicbase options
  1834. # for Windows
  1835. save_LDFLAGS="$LDFLAGS"
  1836. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1837. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1838. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1839. [AC_MSG_RESULT([yes])]
  1840. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1841. [AC_MSG_RESULT([no])]
  1842. )
  1843. LDFLAGS="$save_LDFLAGS"
  1844. fi
  1845. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1846. # than autoconf's macros like.
  1847. if test "$GCC" = "yes"; then
  1848. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1849. # accident waiting to happen.
  1850. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1851. else
  1852. # Override optimization level for non-gcc compilers
  1853. CFLAGS="$CFLAGS -O"
  1854. enable_gcc_warnings=no
  1855. enable_gcc_warnings_advisory=no
  1856. fi
  1857. # Warnings implies advisory-warnings and -Werror.
  1858. if test "$enable_gcc_warnings" = "yes"; then
  1859. enable_gcc_warnings_advisory=yes
  1860. enable_fatal_warnings=yes
  1861. fi
  1862. # OS X Lion started deprecating the system openssl. Let's just disable
  1863. # all deprecation warnings on OS X. Also, to potentially make the binary
  1864. # a little smaller, let's enable dead_strip.
  1865. case "$host_os" in
  1866. darwin*)
  1867. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1868. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1869. esac
  1870. # Add some more warnings which we use in development but not in the
  1871. # released versions. (Some relevant gcc versions can't handle these.)
  1872. #
  1873. # Note that we have to do this near the end of the autoconf process, or
  1874. # else we may run into problems when these warnings hit on the testing C
  1875. # programs that autoconf wants to build.
  1876. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1877. case "$host" in
  1878. *-*-openbsd* | *-*-bitrig*)
  1879. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1880. # That's fine, except that the headers don't pass -Wredundant-decls.
  1881. # Therefore, let's disable -Wsystem-headers when we're building
  1882. # with maximal warnings on OpenBSD.
  1883. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1884. esac
  1885. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1886. # have it work better.
  1887. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1888. # This warning was added in gcc 4.3, but it appears to generate
  1889. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1890. #CFLAGS="$CFLAGS -Wlogical-op"
  1891. m4_foreach_w([warning_flag], [
  1892. -Waddress
  1893. -Waddress-of-array-temporary
  1894. -Waddress-of-temporary
  1895. -Wambiguous-macro
  1896. -Wanonymous-pack-parens
  1897. -Warc
  1898. -Warc-abi
  1899. -Warc-bridge-casts-disallowed-in-nonarc
  1900. -Warc-maybe-repeated-use-of-weak
  1901. -Warc-performSelector-leaks
  1902. -Warc-repeated-use-of-weak
  1903. -Warray-bounds
  1904. -Warray-bounds-pointer-arithmetic
  1905. -Wasm
  1906. -Wasm-operand-widths
  1907. -Watomic-properties
  1908. -Watomic-property-with-user-defined-accessor
  1909. -Wauto-import
  1910. -Wauto-storage-class
  1911. -Wauto-var-id
  1912. -Wavailability
  1913. -Wbackslash-newline-escape
  1914. -Wbad-array-new-length
  1915. -Wbind-to-temporary-copy
  1916. -Wbitfield-constant-conversion
  1917. -Wbool-conversion
  1918. -Wbool-conversions
  1919. -Wbuiltin-requires-header
  1920. -Wchar-align
  1921. -Wcompare-distinct-pointer-types
  1922. -Wcomplex-component-init
  1923. -Wconditional-type-mismatch
  1924. -Wconfig-macros
  1925. -Wconstant-conversion
  1926. -Wconstant-logical-operand
  1927. -Wconstexpr-not-const
  1928. -Wcustom-atomic-properties
  1929. -Wdangling-field
  1930. -Wdangling-initializer-list
  1931. -Wdate-time
  1932. -Wdelegating-ctor-cycles
  1933. -Wdeprecated-implementations
  1934. -Wdeprecated-register
  1935. -Wdirect-ivar-access
  1936. -Wdiscard-qual
  1937. -Wdistributed-object-modifiers
  1938. -Wdivision-by-zero
  1939. -Wdollar-in-identifier-extension
  1940. -Wdouble-promotion
  1941. -Wduplicate-decl-specifier
  1942. -Wduplicate-enum
  1943. -Wduplicate-method-arg
  1944. -Wduplicate-method-match
  1945. -Wduplicated-cond
  1946. -Wdynamic-class-memaccess
  1947. -Wembedded-directive
  1948. -Wempty-translation-unit
  1949. -Wenum-conversion
  1950. -Wexit-time-destructors
  1951. -Wexplicit-ownership-type
  1952. -Wextern-initializer
  1953. -Wextra
  1954. -Wextra-semi
  1955. -Wextra-tokens
  1956. -Wflexible-array-extensions
  1957. -Wfloat-conversion
  1958. -Wformat-non-iso
  1959. -Wfour-char-constants
  1960. -Wgcc-compat
  1961. -Wglobal-constructors
  1962. -Wgnu-array-member-paren-init
  1963. -Wgnu-designator
  1964. -Wgnu-static-float-init
  1965. -Wheader-guard
  1966. -Wheader-hygiene
  1967. -Widiomatic-parentheses
  1968. -Wignored-attributes
  1969. -Wimplicit-atomic-properties
  1970. -Wimplicit-conversion-floating-point-to-bool
  1971. -Wimplicit-exception-spec-mismatch
  1972. -Wimplicit-fallthrough
  1973. -Wimplicit-fallthrough-per-function
  1974. -Wimplicit-retain-self
  1975. -Wimport-preprocessor-directive-pedantic
  1976. -Wincompatible-library-redeclaration
  1977. -Wincompatible-pointer-types-discards-qualifiers
  1978. -Wincomplete-implementation
  1979. -Wincomplete-module
  1980. -Wincomplete-umbrella
  1981. -Winit-self
  1982. -Wint-conversions
  1983. -Wint-to-void-pointer-cast
  1984. -Winteger-overflow
  1985. -Winvalid-constexpr
  1986. -Winvalid-iboutlet
  1987. -Winvalid-noreturn
  1988. -Winvalid-pp-token
  1989. -Winvalid-source-encoding
  1990. -Winvalid-token-paste
  1991. -Wknr-promoted-parameter
  1992. -Wlarge-by-value-copy
  1993. -Wliteral-conversion
  1994. -Wliteral-range
  1995. -Wlocal-type-template-args
  1996. -Wlogical-op
  1997. -Wloop-analysis
  1998. -Wmain-return-type
  1999. -Wmalformed-warning-check
  2000. -Wmethod-signatures
  2001. -Wmicrosoft
  2002. -Wmicrosoft-exists
  2003. -Wmismatched-parameter-types
  2004. -Wmismatched-return-types
  2005. -Wmissing-field-initializers
  2006. -Wmissing-format-attribute
  2007. -Wmissing-noreturn
  2008. -Wmissing-selector-name
  2009. -Wmissing-sysroot
  2010. -Wmissing-variable-declarations
  2011. -Wmodule-conflict
  2012. -Wnested-anon-types
  2013. -Wnewline-eof
  2014. -Wnon-literal-null-conversion
  2015. -Wnon-pod-varargs
  2016. -Wnonportable-cfstrings
  2017. -Wnormalized=nfkc
  2018. -Wnull-arithmetic
  2019. -Wnull-character
  2020. -Wnull-conversion
  2021. -Wnull-dereference
  2022. -Wout-of-line-declaration
  2023. -Wover-aligned
  2024. -Woverlength-strings
  2025. -Woverride-init
  2026. -Woverriding-method-mismatch
  2027. -Wpointer-type-mismatch
  2028. -Wpredefined-identifier-outside-function
  2029. -Wprotocol-property-synthesis-ambiguity
  2030. -Wreadonly-iboutlet-property
  2031. -Wreadonly-setter-attrs
  2032. -Wreceiver-expr
  2033. -Wreceiver-forward-class
  2034. -Wreceiver-is-weak
  2035. -Wreinterpret-base-class
  2036. -Wrequires-super-attribute
  2037. -Wreserved-user-defined-literal
  2038. -Wreturn-stack-address
  2039. -Wsection
  2040. -Wselector-type-mismatch
  2041. -Wsentinel
  2042. -Wserialized-diagnostics
  2043. -Wshadow
  2044. -Wshift-count-negative
  2045. -Wshift-count-overflow
  2046. -Wshift-negative-value
  2047. -Wshift-overflow=2
  2048. -Wshift-sign-overflow
  2049. -Wshorten-64-to-32
  2050. -Wsizeof-array-argument
  2051. -Wsource-uses-openmp
  2052. -Wstatic-float-init
  2053. -Wstatic-in-inline
  2054. -Wstatic-local-in-inline
  2055. -Wstrict-overflow=1
  2056. -Wstring-compare
  2057. -Wstring-conversion
  2058. -Wstrlcpy-strlcat-size
  2059. -Wstrncat-size
  2060. -Wsuggest-attribute=format
  2061. -Wsuggest-attribute=noreturn
  2062. -Wsuper-class-method-mismatch
  2063. -Wswitch-bool
  2064. -Wsync-nand
  2065. -Wtautological-constant-out-of-range-compare
  2066. -Wtentative-definition-incomplete-type
  2067. -Wtrampolines
  2068. -Wtype-safety
  2069. -Wtypedef-redefinition
  2070. -Wtypename-missing
  2071. -Wundefined-inline
  2072. -Wundefined-internal
  2073. -Wundefined-reinterpret-cast
  2074. -Wunicode
  2075. -Wunicode-whitespace
  2076. -Wunknown-warning-option
  2077. -Wunnamed-type-template-args
  2078. -Wunneeded-member-function
  2079. -Wunsequenced
  2080. -Wunsupported-visibility
  2081. -Wunused-but-set-parameter
  2082. -Wunused-but-set-variable
  2083. -Wunused-command-line-argument
  2084. -Wunused-const-variable=2
  2085. -Wunused-exception-parameter
  2086. -Wunused-local-typedefs
  2087. -Wunused-member-function
  2088. -Wunused-sanitize-argument
  2089. -Wunused-volatile-lvalue
  2090. -Wuser-defined-literals
  2091. -Wvariadic-macros
  2092. -Wvector-conversion
  2093. -Wvector-conversions
  2094. -Wvexing-parse
  2095. -Wvisibility
  2096. -Wvla-extension
  2097. -Wzero-length-array
  2098. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  2099. dnl We should re-enable this in some later version. Clang doesn't
  2100. dnl mind, but it causes trouble with GCC.
  2101. dnl -Wstrict-overflow=2
  2102. dnl These seem to require annotations that we don't currently use,
  2103. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  2104. dnl -Wthread-safety
  2105. dnl -Wthread-safety-analysis
  2106. dnl -Wthread-safety-attributes
  2107. dnl -Wthread-safety-beta
  2108. dnl -Wthread-safety-precise
  2109. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  2110. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  2111. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  2112. CFLAGS="$CFLAGS -Wwrite-strings"
  2113. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  2114. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  2115. CFLAGS="$CFLAGS -Wunused-parameter "
  2116. # These interfere with building main() { return 0; }, which autoconf
  2117. # likes to use as its default program.
  2118. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  2119. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  2120. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  2121. fi
  2122. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  2123. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  2124. fi
  2125. if test "$tor_cv_cflags__warn_unused_const_variable_2" = "yes"; then
  2126. AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
  2127. fi
  2128. if test "x$enable_fatal_warnings" = "xyes"; then
  2129. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  2130. # default autoconf programs are full of errors.
  2131. CFLAGS="$CFLAGS -Werror"
  2132. fi
  2133. fi
  2134. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  2135. case "$host_os" in
  2136. darwin*)
  2137. 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.])
  2138. esac
  2139. fi
  2140. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  2141. AC_CONFIG_FILES([
  2142. Doxyfile
  2143. Makefile
  2144. config.rust
  2145. contrib/dist/suse/tor.sh
  2146. contrib/operator-tools/tor.logrotate
  2147. contrib/dist/tor.sh
  2148. contrib/dist/torctl
  2149. contrib/dist/tor.service
  2150. src/config/torrc.sample
  2151. src/config/torrc.minimal
  2152. src/rust/.cargo/config
  2153. scripts/maint/checkOptionDocs.pl
  2154. ])
  2155. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  2156. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  2157. for file in $regular_mans ; do
  2158. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  2159. echo "==================================";
  2160. echo;
  2161. echo "Building Tor has failed since manpages cannot be built.";
  2162. echo;
  2163. echo "You need asciidoc installed to be able to build the manpages.";
  2164. echo "To build without manpages, use the --disable-asciidoc argument";
  2165. echo "when calling configure.";
  2166. echo;
  2167. echo "==================================";
  2168. exit 1;
  2169. fi
  2170. done
  2171. fi
  2172. if test "$fragile_hardening" = "yes"; then
  2173. AC_MSG_WARN([
  2174. ============
  2175. Warning! Building Tor with --enable-fragile-hardening (also known as
  2176. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  2177. other kinds of attacks easier. A Tor instance build with this option will be
  2178. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  2179. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  2180. denial of service attacks. For more information, see
  2181. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  2182. ============
  2183. ])
  2184. fi
  2185. AC_OUTPUT