configure.ac 80 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) 2007-2019, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_PREREQ([2.63])
  6. AC_INIT([tor],[0.4.2.1-alpha])
  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, ["2019-09-16"], # for 0.4.2.1-alpha
  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 "$enable_memory_sentinels" = "no"; then
  91. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  92. [Defined if we're turning off memory safety code to look for bugs])
  93. fi
  94. AC_ARG_ENABLE(manpage,
  95. AS_HELP_STRING(--disable-manpage, [Disable manpage generation.]))
  96. AC_ARG_ENABLE(html-manual,
  97. AS_HELP_STRING(--disable-html-manual, [Disable HTML documentation.]))
  98. AC_ARG_ENABLE(asciidoc,
  99. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  100. [case "${enableval}" in
  101. "yes") asciidoc=true ;;
  102. "no") asciidoc=false ;;
  103. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  104. esac], [asciidoc=true])
  105. # systemd notify support
  106. AC_ARG_ENABLE(systemd,
  107. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  108. [case "${enableval}" in
  109. "yes") systemd=true ;;
  110. "no") systemd=false ;;
  111. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  112. esac], [systemd=auto])
  113. if test "$enable_restart_debugging" = "yes"; then
  114. AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
  115. [Defined if we're building with support for in-process restart debugging.])
  116. fi
  117. if test "$enable_zstd_advanced_apis" != "no"; then
  118. AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
  119. [Defined if we're going to try to use zstd's "static-only" APIs.])
  120. fi
  121. # systemd support
  122. if test "x$enable_systemd" = "xno"; then
  123. have_systemd=no;
  124. else
  125. PKG_CHECK_MODULES(SYSTEMD,
  126. [libsystemd-daemon],
  127. have_systemd=yes,
  128. have_systemd=no)
  129. if test "x$have_systemd" = "xno"; then
  130. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  131. PKG_CHECK_MODULES(SYSTEMD,
  132. [libsystemd],
  133. have_systemd=yes,
  134. have_systemd=no)
  135. fi
  136. fi
  137. if test "x$have_systemd" = "xyes"; then
  138. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  139. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  140. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  141. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  142. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  143. fi
  144. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  145. AC_SUBST(TOR_SYSTEMD_LIBS)
  146. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  147. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  148. fi
  149. case "$host" in
  150. *-*-solaris* )
  151. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  152. ;;
  153. esac
  154. AC_ARG_ENABLE(gcc-warnings,
  155. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  156. AC_ARG_ENABLE(fatal-warnings,
  157. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  158. AC_ARG_ENABLE(gcc-warnings-advisory,
  159. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  160. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  161. AC_ARG_ENABLE(gcc-hardening,
  162. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  163. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  164. AC_ARG_ENABLE(expensive-hardening,
  165. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  166. AC_ARG_ENABLE(fragile-hardening,
  167. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  168. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  169. fragile_hardening="yes"
  170. AC_DEFINE(DEBUG_SMARTLIST, 1, [Enable smartlist debugging])
  171. fi
  172. dnl Linker hardening options
  173. dnl Currently these options are ELF specific - you can't use this with MacOSX
  174. AC_ARG_ENABLE(linker-hardening,
  175. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  176. AC_ARG_ENABLE(local-appdata,
  177. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  178. if test "$enable_local_appdata" = "yes"; then
  179. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  180. [Defined if we default to host local appdata paths on Windows])
  181. fi
  182. AC_ARG_ENABLE(tool-name-check,
  183. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  184. AC_ARG_ENABLE(seccomp,
  185. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  186. AC_ARG_ENABLE(libscrypt,
  187. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  188. dnl Enable event tracing which are transformed to debug log statement.
  189. AC_ARG_ENABLE(event-tracing-debug,
  190. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  191. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  192. if test x$enable_event_tracing_debug = xyes; then
  193. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  194. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  195. fi
  196. dnl Enable Android only features.
  197. AC_ARG_ENABLE(android,
  198. AS_HELP_STRING(--enable-android, [build with Android features enabled]))
  199. AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
  200. if test "x$enable_android" = "xyes"; then
  201. AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
  202. dnl Check if the Android log library is available.
  203. AC_CHECK_HEADERS([android/log.h])
  204. AC_SEARCH_LIBS(__android_log_write, [log])
  205. fi
  206. dnl ---
  207. dnl Tor modules options. These options are namespaced with --disable-module-XXX
  208. dnl ---
  209. dnl All our modules.
  210. m4_define(MODULES, dirauth)
  211. dnl Directory Authority module.
  212. AC_ARG_ENABLE([module-dirauth],
  213. AS_HELP_STRING([--disable-module-dirauth],
  214. [Do not build tor with the dirauth module]),
  215. [], dnl Action if-given
  216. AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
  217. [Compile with Directory Authority feature support]))
  218. AM_CONDITIONAL(BUILD_MODULE_DIRAUTH, [test "x$enable_module_dirauth" != "xno"])
  219. dnl Helper variables.
  220. TOR_MODULES_ALL_ENABLED=
  221. AC_DEFUN([ADD_MODULE], [
  222. MODULE=m4_toupper($1)
  223. TOR_MODULES_ALL_ENABLED="${TOR_MODULES_ALL_ENABLED} -DHAVE_MODULE_${MODULE}=1"
  224. ])
  225. m4_foreach_w([module], MODULES, [ADD_MODULE([module])])
  226. AC_SUBST(TOR_MODULES_ALL_ENABLED)
  227. dnl check for the correct "ar" when cross-compiling.
  228. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  229. dnl so kludge up a replacement for the case where it isn't there yet.)
  230. m4_ifdef([AM_PROG_AR],
  231. [AM_PROG_AR],
  232. [AN_MAKEVAR([AR], [AC_PROG_AR])
  233. AN_PROGRAM([ar], [AC_PROG_AR])
  234. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  235. AC_PROG_AR])
  236. dnl Check whether the above macro has settled for a simply named tool even
  237. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  238. dnl because that will find any cc on the system, not only the cross-compiler,
  239. dnl and then verify that a binary built with this compiler runs on the
  240. dnl build system. It will then come to the false conclusion that we're not
  241. dnl cross-compiling.
  242. if test "x$enable_tool_name_check" != "xno"; then
  243. if test "x$ac_tool_warned" = "xyes"; then
  244. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  245. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  246. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  247. fi
  248. fi
  249. AC_PROG_CC
  250. AC_PROG_CPP
  251. AC_PROG_MAKE_SET
  252. AC_PROG_RANLIB
  253. AC_PROG_SED
  254. AC_ARG_VAR([PERL], [path to Perl binary])
  255. AC_CHECK_PROGS([PERL], [perl])
  256. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  257. dnl check for asciidoc and a2x
  258. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  259. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  260. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  261. AM_CONDITIONAL(BUILD_MANPAGE, [test "x$enable_manpage" != "xno"])
  262. AM_CONDITIONAL(BUILD_HTML_DOCS, [test "x$enable_html_manual" != "xno"])
  263. AM_PROG_CC_C_O
  264. AC_PROG_CC_C99
  265. AC_ARG_VAR([PYTHON], [path to Python binary])
  266. AC_CHECK_PROGS(PYTHON, [ \
  267. python3 \
  268. python3.8 python3.7 python3.6 python3.5 python3.4 \
  269. python \
  270. python2 python2.7])
  271. if test "x$PYTHON" = "x"; then
  272. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  273. fi
  274. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  275. dnl List all external rust crates we depend on here. Include the version
  276. rust_crates=" \
  277. digest-0.7.2 \
  278. libc-0.2.39 \
  279. "
  280. AC_SUBST(rust_crates)
  281. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  282. AC_C_FLEXIBLE_ARRAY_MEMBER
  283. ], [
  284. dnl Maybe we've got an old autoconf...
  285. AC_CACHE_CHECK([for flexible array members],
  286. tor_cv_c_flexarray,
  287. [AC_COMPILE_IFELSE(
  288. AC_LANG_PROGRAM([
  289. struct abc { int a; char b[]; };
  290. ], [
  291. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  292. def->b[0] = 33;
  293. ]),
  294. [tor_cv_c_flexarray=yes],
  295. [tor_cv_c_flexarray=no])])
  296. if test "$tor_cv_flexarray" = "yes"; then
  297. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  298. else
  299. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  300. fi
  301. ])
  302. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  303. tor_cv_c_c99_decl,
  304. [AC_COMPILE_IFELSE(
  305. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  306. [tor_cv_c_c99_decl=yes],
  307. [tor_cv_c_c99_decl=no] )])
  308. if test "$tor_cv_c_c99_decl" != "yes"; then
  309. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  310. fi
  311. AC_CACHE_CHECK([for working C99 designated initializers],
  312. tor_cv_c_c99_designated_init,
  313. [AC_COMPILE_IFELSE(
  314. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  315. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  316. [tor_cv_c_c99_designated_init=yes],
  317. [tor_cv_c_c99_designated_init=no] )])
  318. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  319. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  320. fi
  321. TORUSER=_tor
  322. AC_ARG_WITH(tor-user,
  323. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  324. [
  325. TORUSER=$withval
  326. ]
  327. )
  328. AC_SUBST(TORUSER)
  329. TORGROUP=_tor
  330. AC_ARG_WITH(tor-group,
  331. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  332. [
  333. TORGROUP=$withval
  334. ]
  335. )
  336. AC_SUBST(TORGROUP)
  337. dnl If _WIN32 is defined and non-zero, we are building for win32
  338. AC_MSG_CHECKING([for win32])
  339. AC_RUN_IFELSE([AC_LANG_SOURCE([
  340. int main(int c, char **v) {
  341. #ifdef _WIN32
  342. #if _WIN32
  343. return 0;
  344. #else
  345. return 1;
  346. #endif
  347. #else
  348. return 2;
  349. #endif
  350. }])],
  351. bwin32=true; AC_MSG_RESULT([yes]),
  352. bwin32=false; AC_MSG_RESULT([no]),
  353. bwin32=cross; AC_MSG_RESULT([cross])
  354. )
  355. if test "$bwin32" = "cross"; then
  356. AC_MSG_CHECKING([for win32 (cross)])
  357. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  358. #ifdef _WIN32
  359. int main(int c, char **v) {return 0;}
  360. #else
  361. #error
  362. int main(int c, char **v) {return x(y);}
  363. #endif
  364. ])],
  365. bwin32=true; AC_MSG_RESULT([yes]),
  366. bwin32=false; AC_MSG_RESULT([no]))
  367. fi
  368. AH_BOTTOM([
  369. #ifdef _WIN32
  370. /* Defined to access windows functions and definitions for >=WinXP */
  371. # ifndef WINVER
  372. # define WINVER 0x0501
  373. # endif
  374. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  375. # ifndef _WIN32_WINNT
  376. # define _WIN32_WINNT 0x0501
  377. # endif
  378. /* Defined to avoid including some windows headers as part of Windows.h */
  379. # ifndef WIN32_LEAN_AND_MEAN
  380. # define WIN32_LEAN_AND_MEAN 1
  381. # endif
  382. #endif
  383. ])
  384. AM_CONDITIONAL(WIN32, test "x$bwin32" = "xtrue")
  385. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  386. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  387. dnl Enable C99 when compiling with MIPSpro
  388. AC_MSG_CHECKING([for MIPSpro compiler])
  389. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  390. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  391. #error
  392. return x(y);
  393. #endif
  394. ])],
  395. bmipspro=false; AC_MSG_RESULT(no),
  396. bmipspro=true; AC_MSG_RESULT(yes))
  397. if test "$bmipspro" = "true"; then
  398. CFLAGS="$CFLAGS -c99"
  399. fi
  400. AC_C_BIGENDIAN
  401. AC_ARG_VAR([TOR_RUST_TARGET], [Rust target, must be specified when cross-compiling (HOST != BUILD). example: i686-pc-windows-gnu])
  402. if test "x$enable_rust" = "xyes"; then
  403. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  404. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  405. if test "x$RUSTC" = "xno"; then
  406. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  407. fi
  408. AC_ARG_VAR([CARGO], [path to the cargo binary])
  409. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  410. if test "x$CARGO" = "xno"; then
  411. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  412. fi
  413. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  414. if test "x$enable_fatal_warnings" = "xyes"; then
  415. RUST_WARN=
  416. else
  417. RUST_WARN=#
  418. fi
  419. if test "x$enable_cargo_online_mode" = "xyes"; then
  420. CARGO_ONLINE=
  421. RUST_DL=#
  422. else
  423. CARGO_ONLINE=--frozen
  424. RUST_DL=
  425. dnl When we're not allowed to touch the network, we need crate dependencies
  426. dnl locally available.
  427. AC_MSG_CHECKING([rust crate dependencies])
  428. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  429. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  430. TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
  431. fi
  432. dnl Check whether the path exists before we try to cd into it.
  433. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  434. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  435. ERRORED=1
  436. fi
  437. dnl Make the path absolute, since we'll be using it from within a
  438. dnl subdirectory.
  439. TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
  440. for dep in $rust_crates; do
  441. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  442. 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.])
  443. ERRORED=1
  444. fi
  445. done
  446. if test "x$ERRORED" = "x"; then
  447. AC_MSG_RESULT([yes])
  448. fi
  449. fi
  450. dnl For now both MSVC and MinGW rust libraries will output static libs with
  451. dnl the MSVC naming convention.
  452. if test "$bwin32" = "true"; then
  453. tor_rust_static_name=tor_rust.lib
  454. else
  455. tor_rust_static_name=libtor_rust.a
  456. fi
  457. AC_CANONICAL_BUILD
  458. if test -n "$TOR_RUST_TARGET"; then
  459. if test "$host" = "$build"; then
  460. AC_MSG_ERROR([HOST = BUILD is invalid if TOR_RUST_TARGET is specified, see configure --help for more information.])
  461. fi
  462. RUST_TARGET_PROP="target = '$TOR_RUST_TARGET'"
  463. TOR_RUST_LIB_PATH="src/rust/target/$TOR_RUST_TARGET/release/$tor_rust_static_name"
  464. else
  465. if test "$host" != "$build"; then
  466. AC_MSG_ERROR([TOR_RUST_TARGET must be specified when cross-compiling with Rust enabled.])
  467. fi
  468. RUST_TARGET_PROP=
  469. TOR_RUST_LIB_PATH="src/rust/target/release/$tor_rust_static_name"
  470. fi
  471. AC_SUBST(RUST_TARGET_PROP)
  472. AC_SUBST(TOR_RUST_LIB_PATH)
  473. AC_SUBST(CARGO_ONLINE)
  474. AC_SUBST(RUST_WARN)
  475. AC_SUBST(RUST_DL)
  476. dnl Let's check the rustc version, too
  477. AC_MSG_CHECKING([rust version])
  478. RUSTC_VERSION=`$RUSTC --version`
  479. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  480. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  481. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  482. AC_MSG_ERROR([rustc version couldn't be identified])
  483. fi
  484. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 31; then
  485. AC_MSG_ERROR([rustc must be at least version 1.31.0])
  486. fi
  487. AC_MSG_RESULT([$RUSTC_VERSION])
  488. fi
  489. AC_SEARCH_LIBS(socket, [socket network])
  490. AC_SEARCH_LIBS(gethostbyname, [nsl])
  491. AC_SEARCH_LIBS(dlopen, [dl])
  492. AC_SEARCH_LIBS(inet_aton, [resolv])
  493. AC_SEARCH_LIBS(backtrace, [execinfo])
  494. saved_LIBS="$LIBS"
  495. AC_SEARCH_LIBS([clock_gettime], [rt])
  496. if test "$LIBS" != "$saved_LIBS"; then
  497. # Looks like we need -lrt for clock_gettime().
  498. have_rt=yes
  499. fi
  500. if test "$bwin32" = "false"; then
  501. AC_SEARCH_LIBS(pthread_create, [pthread])
  502. AC_SEARCH_LIBS(pthread_detach, [pthread])
  503. fi
  504. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  505. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  506. AC_CHECK_FUNCS(
  507. _NSGetEnviron \
  508. RtlSecureZeroMemory \
  509. SecureZeroMemory \
  510. accept4 \
  511. backtrace \
  512. backtrace_symbols_fd \
  513. eventfd \
  514. explicit_bzero \
  515. timingsafe_memcmp \
  516. flock \
  517. ftime \
  518. get_current_dir_name \
  519. getaddrinfo \
  520. getdelim \
  521. getifaddrs \
  522. getline \
  523. getpass \
  524. getrlimit \
  525. gettimeofday \
  526. gmtime_r \
  527. gnu_get_libc_version \
  528. htonll \
  529. inet_aton \
  530. ioctl \
  531. issetugid \
  532. llround \
  533. localtime_r \
  534. lround \
  535. madvise \
  536. memmem \
  537. memset_s \
  538. minherit \
  539. mmap \
  540. pipe \
  541. pipe2 \
  542. prctl \
  543. readpassphrase \
  544. rint \
  545. sigaction \
  546. socketpair \
  547. statvfs \
  548. strncasecmp \
  549. strcasecmp \
  550. strlcat \
  551. strlcpy \
  552. strnlen \
  553. strptime \
  554. strtok_r \
  555. strtoull \
  556. sysconf \
  557. sysctl \
  558. truncate \
  559. uname \
  560. usleep \
  561. vasprintf \
  562. _vscprintf
  563. )
  564. # Apple messed up when they added some functions: they
  565. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  566. # checks.
  567. # We should only probe for these functions if we are sure that we
  568. # are not targeting OS X 10.9 or earlier.
  569. AC_MSG_CHECKING([for a pre-Yosemite OS X build target])
  570. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  571. #ifdef __APPLE__
  572. # include <AvailabilityMacros.h>
  573. # ifndef MAC_OS_X_VERSION_10_10
  574. # define MAC_OS_X_VERSION_10_10 101000
  575. # endif
  576. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  577. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
  578. # error "Running on Mac OS X 10.9 or earlier"
  579. # endif
  580. # endif
  581. #endif
  582. ]], [[]])],
  583. [on_macos_pre_10_10=no ; AC_MSG_RESULT([no])],
  584. [on_macos_pre_10_10=yes; AC_MSG_RESULT([yes])])
  585. if test "$on_macos_pre_10_10" = "no"; then
  586. AC_CHECK_FUNCS(
  587. mach_approximate_time \
  588. )
  589. fi
  590. # We should only probe for these functions if we are sure that we
  591. # are not targeting OSX 10.11 or earlier.
  592. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  593. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  594. #ifdef __APPLE__
  595. # include <AvailabilityMacros.h>
  596. # ifndef MAC_OS_X_VERSION_10_12
  597. # define MAC_OS_X_VERSION_10_12 101200
  598. # endif
  599. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  600. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  601. # error "Running on Mac OSX 10.11 or earlier"
  602. # endif
  603. # endif
  604. #endif
  605. ]], [[]])],
  606. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  607. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  608. if test "$on_macos_pre_10_12" = "no"; then
  609. AC_CHECK_FUNCS(
  610. clock_gettime \
  611. getentropy \
  612. )
  613. fi
  614. if test "$bwin32" != "true"; then
  615. AC_CHECK_HEADERS(pthread.h)
  616. AC_CHECK_FUNCS(pthread_create)
  617. AC_CHECK_FUNCS(pthread_condattr_setclock)
  618. fi
  619. if test "$bwin32" = "true"; then
  620. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  621. #include <windows.h>
  622. #include <conio.h>
  623. #include <wchar.h>
  624. ])
  625. fi
  626. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  627. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  628. AC_MSG_CHECKING([whether free(NULL) works])
  629. AC_RUN_IFELSE([AC_LANG_PROGRAM([
  630. #include <stdlib.h>
  631. ], [
  632. char *p = NULL;
  633. free(p);
  634. ])],
  635. [free_null_ok=true; AC_MSG_RESULT(yes)],
  636. [free_null_ok=false; AC_MSG_RESULT(no)],
  637. [free_null_ok=cross; AC_MSG_RESULT(cross)])
  638. if test "$free_null_ok" = "false"; then
  639. AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
  640. fi
  641. dnl ------------------------------------------------------
  642. dnl Where do you live, libevent? And how do we call you?
  643. if test "$bwin32" = "true"; then
  644. TOR_LIB_WS32=-lws2_32
  645. TOR_LIB_IPHLPAPI=-liphlpapi
  646. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  647. # think it's actually necessary.
  648. TOR_LIB_GDI=-lgdi32
  649. TOR_LIB_USERENV=-luserenv
  650. else
  651. TOR_LIB_WS32=
  652. TOR_LIB_GDI=
  653. TOR_LIB_USERENV=
  654. fi
  655. AC_SUBST(TOR_LIB_WS32)
  656. AC_SUBST(TOR_LIB_GDI)
  657. AC_SUBST(TOR_LIB_IPHLPAPI)
  658. AC_SUBST(TOR_LIB_USERENV)
  659. tor_libevent_pkg_redhat="libevent"
  660. tor_libevent_pkg_debian="libevent-dev"
  661. tor_libevent_devpkg_redhat="libevent-devel"
  662. tor_libevent_devpkg_debian="libevent-dev"
  663. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  664. dnl linking for static builds.
  665. STATIC_LIBEVENT_FLAGS=""
  666. if test "$enable_static_libevent" = "yes"; then
  667. if test "$have_rt" = "yes"; then
  668. STATIC_LIBEVENT_FLAGS=" -lrt "
  669. fi
  670. fi
  671. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  672. #ifdef _WIN32
  673. #include <winsock2.h>
  674. #endif
  675. #include <sys/time.h>
  676. #include <sys/types.h>
  677. #include <event2/event.h>], [
  678. #ifdef _WIN32
  679. #include <winsock2.h>
  680. #endif
  681. struct event_base;
  682. struct event_base *event_base_new(void);
  683. void event_base_free(struct event_base *);],
  684. [
  685. #ifdef _WIN32
  686. {WSADATA d; WSAStartup(0x101,&d); }
  687. #endif
  688. event_base_free(event_base_new());
  689. ], [--with-libevent-dir], [/opt/libevent])
  690. dnl Determine the incantation needed to link libevent.
  691. save_LIBS="$LIBS"
  692. save_LDFLAGS="$LDFLAGS"
  693. save_CPPFLAGS="$CPPFLAGS"
  694. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  695. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  696. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  697. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  698. if test "$enable_static_libevent" = "yes"; then
  699. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  700. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  701. else
  702. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  703. fi
  704. else
  705. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  706. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  707. 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"))
  708. if test "$ac_cv_search_event_new" != "none required"; then
  709. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  710. fi
  711. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  712. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  713. fi
  714. else
  715. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  716. fi
  717. fi
  718. dnl Now check for particular libevent functions.
  719. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  720. evutil_secure_rng_add_bytes \
  721. evdns_base_get_nameserver_addr \
  722. ])
  723. LIBS="$save_LIBS"
  724. LDFLAGS="$save_LDFLAGS"
  725. CPPFLAGS="$save_CPPFLAGS"
  726. dnl Check that libevent is at least at version 2.0.10, the first stable
  727. dnl release of its series
  728. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  729. AC_MSG_CHECKING([whether Libevent is new enough])
  730. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  731. #include <event2/event.h>
  732. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  733. #error
  734. int x = y(zz);
  735. #else
  736. int x = 1;
  737. #endif
  738. ])], [ AC_MSG_RESULT([yes]) ],
  739. [ AC_MSG_RESULT([no])
  740. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  741. LIBS="$save_LIBS"
  742. LDFLAGS="$save_LDFLAGS"
  743. CPPFLAGS="$save_CPPFLAGS"
  744. AC_SUBST(TOR_LIBEVENT_LIBS)
  745. dnl ------------------------------------------------------
  746. dnl Where do you live, libm?
  747. dnl On some platforms (Haiku/BeOS) the math library is
  748. dnl part of libroot. In which case don't link against lm
  749. TOR_LIB_MATH=""
  750. save_LIBS="$LIBS"
  751. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  752. if test "$ac_cv_search_pow" != "none required"; then
  753. TOR_LIB_MATH="$ac_cv_search_pow"
  754. fi
  755. LIBS="$save_LIBS"
  756. AC_SUBST(TOR_LIB_MATH)
  757. dnl ------------------------------------------------------
  758. dnl Hello, NSS. You're new around here.
  759. if test "x$enable_nss" = "xyes"; then
  760. PKG_CHECK_MODULES(NSS,
  761. [nss],
  762. [have_nss=yes],
  763. [have_nss=no; AC_MSG_ERROR([You asked for NSS but I can't find it.])])
  764. AC_SUBST(NSS_CFLAGS)
  765. AC_SUBST(NSS_LIBS)
  766. fi
  767. dnl ------------------------------------------------------
  768. dnl Where do you live, openssl? And how do we call you?
  769. if test "x$enable_nss" != "xyes"; then
  770. tor_openssl_pkg_redhat="openssl"
  771. tor_openssl_pkg_debian="libssl-dev"
  772. tor_openssl_devpkg_redhat="openssl-devel"
  773. tor_openssl_devpkg_debian="libssl-dev"
  774. ALT_openssl_WITHVAL=""
  775. AC_ARG_WITH(ssl-dir,
  776. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  777. [
  778. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  779. ALT_openssl_WITHVAL="$withval"
  780. fi
  781. ])
  782. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  783. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  784. [#include <openssl/ssl.h>
  785. char *getenv(const char *);],
  786. [struct ssl_cipher_st;
  787. unsigned SSL_CIPHER_get_id(const struct ssl_cipher_st *);
  788. char *getenv(const char *);],
  789. dnl This funny-looking test program calls getenv, so that the compiler
  790. dnl will neither make code that call SSL_CIPHER_get_id(NULL) [producing
  791. dnl a crash], nor optimize out the call to SSL_CIPHER_get_id().
  792. dnl We look for SSL_cipher_get_id() because it is present in
  793. dnl OpenSSL >=1.0.1, because it is not deprecated, and because Tor
  794. dnl depends on it.
  795. [if (getenv("THIS_SHOULDNT_BE_SET_X201803")) SSL_CIPHER_get_id((void *)0);], [],
  796. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  797. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  798. if test "$enable_static_openssl" = "yes"; then
  799. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  800. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  801. else
  802. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  803. fi
  804. else
  805. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  806. fi
  807. AC_SUBST(TOR_OPENSSL_LIBS)
  808. dnl Now check for particular openssl functions.
  809. save_LIBS="$LIBS"
  810. save_LDFLAGS="$LDFLAGS"
  811. save_CPPFLAGS="$CPPFLAGS"
  812. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  813. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  814. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  815. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  816. #include <openssl/opensslv.h>
  817. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  818. #error "too old"
  819. #endif
  820. ]], [[]])],
  821. [ : ],
  822. [ 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.]) ])
  823. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  824. #include <openssl/opensslv.h>
  825. #include <openssl/evp.h>
  826. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  827. #error "no ECC"
  828. #endif
  829. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  830. #error "curves unavailable"
  831. #endif
  832. ]], [[]])],
  833. [ : ],
  834. [ 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.]) ])
  835. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  836. [#include <openssl/ssl.h>
  837. ])
  838. dnl OpenSSL functions which we might not have. In theory, we could just
  839. dnl check the openssl version number, but in practice that gets pretty
  840. dnl confusing with LibreSSL, OpenSSL, and various distributions' patches
  841. dnl to them.
  842. AC_CHECK_FUNCS([ \
  843. ERR_load_KDF_strings \
  844. EVP_PBE_scrypt \
  845. EVP_sha3_256 \
  846. SSL_CIPHER_find \
  847. SSL_CTX_set1_groups_list \
  848. SSL_CTX_set_security_level \
  849. SSL_SESSION_get_master_key \
  850. SSL_get_client_ciphers \
  851. SSL_get_client_random \
  852. SSL_get_server_random \
  853. TLS_method \
  854. ])
  855. dnl Check if OpenSSL structures are opaque
  856. AC_CHECK_MEMBERS([SSL.state], , ,
  857. [#include <openssl/ssl.h>
  858. ])
  859. AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
  860. #include <openssl/sha.h>
  861. ])
  862. fi # enable_nss
  863. dnl We will someday make KECCAK_TINY optional, but for now we still need
  864. dnl it for SHAKE, since OpenSSL's SHAKE can't be squeezed more than
  865. dnl once. See comment in the definition of crypto_xof_t.
  866. dnl AM_CONDITIONAL(BUILD_KECCAK_TINY,
  867. dnl test "x$ac_cv_func_EVP_sha3_256" != "xyes")
  868. AM_CONDITIONAL(BUILD_KECCAK_TINY, true)
  869. dnl ======================================================================
  870. dnl Can we use KIST?
  871. dnl Define the set of checks for KIST scheduler support.
  872. AC_DEFUN([CHECK_KIST_SUPPORT],[
  873. dnl KIST needs struct tcp_info and for certain members to exist.
  874. AC_CHECK_MEMBERS(
  875. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  876. , ,[[#include <netinet/tcp.h>]])
  877. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  878. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  879. #include <linux/sockios.h>
  880. #ifndef SIOCOUTQNSD
  881. #error
  882. #endif
  883. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  884. if test "x$have_siocoutqnsd" = "xyes"; then
  885. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  886. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  887. have_kist_support=yes
  888. fi
  889. fi
  890. fi
  891. ])
  892. dnl Now, trigger the check.
  893. CHECK_KIST_SUPPORT
  894. AS_IF([test "x$have_kist_support" = "xyes"],
  895. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  896. on this system])],
  897. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  898. LIBS="$save_LIBS"
  899. LDFLAGS="$save_LDFLAGS"
  900. CPPFLAGS="$save_CPPFLAGS"
  901. dnl ------------------------------------------------------
  902. dnl Where do you live, zlib? And how do we call you?
  903. tor_zlib_pkg_redhat="zlib"
  904. tor_zlib_pkg_debian="zlib1g"
  905. tor_zlib_devpkg_redhat="zlib-devel"
  906. tor_zlib_devpkg_debian="zlib1g-dev"
  907. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  908. [#include <zlib.h>],
  909. [const char * zlibVersion(void);],
  910. [zlibVersion();], [--with-zlib-dir],
  911. [/opt/zlib])
  912. if test "$enable_static_zlib" = "yes"; then
  913. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  914. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  915. using --enable-static-zlib")
  916. else
  917. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  918. fi
  919. else
  920. TOR_ZLIB_LIBS="-lz"
  921. fi
  922. AC_SUBST(TOR_ZLIB_LIBS)
  923. dnl ------------------------------------------------------
  924. dnl Where we do we find lzma?
  925. AC_ARG_ENABLE(lzma,
  926. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  927. [case "${enableval}" in
  928. "yes") lzma=true ;;
  929. "no") lzma=false ;;
  930. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  931. esac], [lzma=auto])
  932. if test "x$enable_lzma" = "xno"; then
  933. have_lzma=no;
  934. else
  935. PKG_CHECK_MODULES([LZMA],
  936. [liblzma],
  937. have_lzma=yes,
  938. have_lzma=no)
  939. if test "x$have_lzma" = "xno" ; then
  940. AC_MSG_WARN([Unable to find liblzma.])
  941. fi
  942. fi
  943. if test "x$have_lzma" = "xyes"; then
  944. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  945. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  946. TOR_LZMA_LIBS="${LZMA_LIBS}"
  947. fi
  948. AC_SUBST(TOR_LZMA_CFLAGS)
  949. AC_SUBST(TOR_LZMA_LIBS)
  950. dnl ------------------------------------------------------
  951. dnl Where we do we find zstd?
  952. AC_ARG_ENABLE(zstd,
  953. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  954. [case "${enableval}" in
  955. "yes") zstd=true ;;
  956. "no") zstd=false ;;
  957. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  958. esac], [zstd=auto])
  959. if test "x$enable_zstd" = "xno"; then
  960. have_zstd=no;
  961. else
  962. PKG_CHECK_MODULES([ZSTD],
  963. [libzstd >= 1.1],
  964. have_zstd=yes,
  965. have_zstd=no)
  966. if test "x$have_zstd" = "xno" ; then
  967. AC_MSG_WARN([Unable to find libzstd.])
  968. fi
  969. fi
  970. if test "x$have_zstd" = "xyes"; then
  971. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  972. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  973. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  974. dnl now check for zstd functions
  975. save_LIBS="$LIBS"
  976. save_CFLAGS="$CFLAGS"
  977. LIBS="$LIBS $ZSTD_LIBS"
  978. CFLAGS="$CFLAGS $ZSTD_CFLAGS"
  979. AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
  980. ZSTD_estimateDCtxSize)
  981. LIBS="$save_LIBS"
  982. CFLAGS="$save_CFLAGS"
  983. fi
  984. AC_SUBST(TOR_ZSTD_CFLAGS)
  985. AC_SUBST(TOR_ZSTD_LIBS)
  986. dnl ----------------------------------------------------------------------
  987. dnl Check if libcap is available for capabilities.
  988. tor_cap_pkg_debian="libcap2"
  989. tor_cap_pkg_redhat="libcap"
  990. tor_cap_devpkg_debian="libcap-dev"
  991. tor_cap_devpkg_redhat="libcap-devel"
  992. AC_CHECK_LIB([cap], [cap_init], [],
  993. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  994. )
  995. AC_CHECK_FUNCS(cap_set_proc)
  996. dnl ---------------------------------------------------------------------
  997. dnl Now that we know about our major libraries, we can check for compiler
  998. dnl and linker hardening options. We need to do this with the libraries known,
  999. dnl since sometimes the linker will like an option but not be willing to
  1000. dnl use it with a build of a library.
  1001. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  1002. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  1003. CFLAGS_FTRAPV=
  1004. CFLAGS_FWRAPV=
  1005. CFLAGS_ASAN=
  1006. CFLAGS_UBSAN=
  1007. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1008. #if !defined(__clang__)
  1009. #error
  1010. #endif])], have_clang=yes, have_clang=no)
  1011. if test "x$enable_pic" = "xyes"; then
  1012. TOR_CHECK_CFLAGS(-fPIC)
  1013. fi
  1014. if test "x$enable_gcc_hardening" != "xno"; then
  1015. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  1016. if test "x$have_clang" = "xyes"; then
  1017. TOR_CHECK_CFLAGS(-Qunused-arguments)
  1018. fi
  1019. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  1020. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  1021. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  1022. m4_ifdef([AS_VAR_IF],[
  1023. AS_VAR_IF(can_compile, [yes],
  1024. AS_VAR_IF(can_link, [yes],
  1025. [],
  1026. AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
  1027. )])
  1028. AS_VAR_POPDEF([can_link])
  1029. AS_VAR_POPDEF([can_compile])
  1030. TOR_CHECK_CFLAGS(-Wstack-protector)
  1031. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  1032. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  1033. if test "$enable_pic" != "yes"; then
  1034. # If we have already enabled -fPIC, then we don't also need to
  1035. # compile with -fPIE...
  1036. TOR_CHECK_CFLAGS(-fPIE)
  1037. fi
  1038. # ... but we want to link our executables with -pie in any case, since
  1039. # they're executables, not a library.
  1040. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  1041. fi
  1042. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  1043. AC_MSG_CHECKING([whether we can run hardened binaries])
  1044. AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
  1045. [AC_MSG_RESULT([yes])],
  1046. [AC_MSG_RESULT([no])
  1047. AC_MSG_ERROR([dnl
  1048. We can link with compiler hardening options, but we can't run with them.
  1049. That's a bad sign! If you must, you can pass --disable-gcc-hardening to
  1050. configure, but it would be better to figure out what the underlying problem
  1051. is.])],
  1052. [AC_MSG_RESULT([cross])])
  1053. fi
  1054. if test "$fragile_hardening" = "yes"; then
  1055. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  1056. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  1057. 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.])
  1058. fi
  1059. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  1060. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  1061. fi
  1062. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  1063. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1064. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  1065. fi
  1066. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  1067. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1068. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  1069. fi
  1070. TOR_TRY_COMPILE_WITH_CFLAGS([-fno-sanitize=float-divide-by-zero], also_link, CFLAGS_UBSAN="-fno-sanitize=float-divide-by-zero", true)
  1071. if test "$tor_cv_cflags__fno_sanitize_float_divide_by_zero" = "yes" && test "$tor_can_link__fno_sanitize_float_divide_by_zero" != "yes"; then
  1072. AC_MSG_ERROR([The compiler supports -fno-sanitize=float-divide-by-zero, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  1073. fi
  1074. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  1075. fi
  1076. dnl Find the correct libraries to add in order to use the sanitizers.
  1077. dnl
  1078. dnl When building Rust, Cargo will run the linker with the -nodefaultlibs
  1079. dnl option, which will prevent the compiler from linking the sanitizer
  1080. dnl libraries it needs. We need to specify them manually.
  1081. dnl
  1082. dnl What's more, we need to specify them in a linker script rather than
  1083. dnl from build.rs: these options aren't allowed in the cargo:rustc-flags
  1084. dnl variable.
  1085. RUST_LINKER_OPTIONS=""
  1086. if test "x$have_clang" = "xyes"; then
  1087. if test "x$CFLAGS_ASAN" != "x"; then
  1088. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_ASAN -Cdefault-linker-libraries"
  1089. fi
  1090. if test "x$CFLAGS_UBSAN" != "x"; then
  1091. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_UBSAN -Cdefault-linker-libraries"
  1092. fi
  1093. else
  1094. if test "x$CFLAGS_ASAN" != "x"; then
  1095. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=address -Cdefault-linker-libraries"
  1096. fi
  1097. if test "x$CFLAGS_UBSAN" != "x"; then
  1098. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=undefined -Cdefault-linker-libraries"
  1099. fi
  1100. fi
  1101. AC_SUBST(RUST_LINKER_OPTIONS)
  1102. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  1103. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  1104. mulodi_fixes_ftrapv=no
  1105. if test "$have_clang" = "yes"; then
  1106. saved_CFLAGS="$CFLAGS"
  1107. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  1108. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  1109. AC_LINK_IFELSE([
  1110. AC_LANG_SOURCE([[
  1111. #include <stdint.h>
  1112. #include <stdlib.h>
  1113. int main(int argc, char **argv)
  1114. {
  1115. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1116. * (int64_t)atoi(argv[3]);
  1117. return x == 9;
  1118. } ]])],
  1119. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  1120. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  1121. if test "$ftrapv_can_link" = "no"; then
  1122. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  1123. AC_LINK_IFELSE([
  1124. AC_LANG_SOURCE([[
  1125. #include <stdint.h>
  1126. #include <stdlib.h>
  1127. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  1128. *overflow=0;
  1129. return a;
  1130. }
  1131. int main(int argc, char **argv)
  1132. {
  1133. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1134. * (int64_t)atoi(argv[3]);
  1135. return x == 9;
  1136. } ]])],
  1137. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  1138. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  1139. fi
  1140. CFLAGS="$saved_CFLAGS"
  1141. fi
  1142. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  1143. dnl These cflags add bunches of branches, and we haven't been able to
  1144. dnl persuade ourselves that they're suitable for code that needs to be
  1145. dnl constant time.
  1146. AC_SUBST(CFLAGS_BUGTRAP)
  1147. dnl These cflags are variant ones sutable for code that needs to be
  1148. dnl constant-time.
  1149. AC_SUBST(CFLAGS_CONSTTIME)
  1150. if test "x$enable_linker_hardening" != "xno"; then
  1151. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  1152. fi
  1153. # For backtrace support
  1154. TOR_CHECK_LDFLAGS(-rdynamic)
  1155. dnl ------------------------------------------------------
  1156. dnl Now see if we have a -fomit-frame-pointer compiler option.
  1157. saved_CFLAGS="$CFLAGS"
  1158. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  1159. F_OMIT_FRAME_POINTER=''
  1160. if test "$saved_CFLAGS" != "$CFLAGS"; then
  1161. if test "$fragile_hardening" = "yes"; then
  1162. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  1163. fi
  1164. fi
  1165. CFLAGS="$saved_CFLAGS"
  1166. AC_SUBST(F_OMIT_FRAME_POINTER)
  1167. dnl ------------------------------------------------------
  1168. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  1169. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  1170. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  1171. dnl code will work.
  1172. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  1173. dnl ============================================================
  1174. dnl Check for libseccomp
  1175. if test "x$enable_seccomp" != "xno"; then
  1176. AC_CHECK_HEADERS([seccomp.h])
  1177. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  1178. fi
  1179. dnl ============================================================
  1180. dnl Check for libscrypt
  1181. if test "x$enable_libscrypt" != "xno"; then
  1182. AC_CHECK_HEADERS([libscrypt.h])
  1183. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  1184. AC_CHECK_FUNCS([libscrypt_scrypt])
  1185. fi
  1186. dnl ============================================================
  1187. dnl We need an implementation of curve25519.
  1188. dnl set these defaults.
  1189. build_curve25519_donna=no
  1190. build_curve25519_donna_c64=no
  1191. use_curve25519_donna=no
  1192. use_curve25519_nacl=no
  1193. CURVE25519_LIBS=
  1194. dnl The best choice is using curve25519-donna-c64, but that requires
  1195. dnl that we
  1196. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  1197. tor_cv_can_use_curve25519_donna_c64,
  1198. [AC_RUN_IFELSE(
  1199. [AC_LANG_PROGRAM([dnl
  1200. #include <stdint.h>
  1201. typedef unsigned uint128_t __attribute__((mode(TI)));
  1202. int func(uint64_t a, uint64_t b) {
  1203. uint128_t c = ((uint128_t)a) * b;
  1204. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1205. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1206. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1207. (((uint64_t)(c))&0xffffffffL) == 0;
  1208. return ok;
  1209. }
  1210. ], [dnl
  1211. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1212. ((uint64_t)1234567890) << 24);
  1213. return !ok;
  1214. ])],
  1215. [tor_cv_can_use_curve25519_donna_c64=yes],
  1216. [tor_cv_can_use_curve25519_donna_c64=no],
  1217. [AC_LINK_IFELSE(
  1218. [AC_LANG_PROGRAM([dnl
  1219. #include <stdint.h>
  1220. typedef unsigned uint128_t __attribute__((mode(TI)));
  1221. int func(uint64_t a, uint64_t b) {
  1222. uint128_t c = ((uint128_t)a) * b;
  1223. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1224. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1225. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1226. (((uint64_t)(c))&0xffffffffL) == 0;
  1227. return ok;
  1228. }
  1229. ], [dnl
  1230. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1231. ((uint64_t)1234567890) << 24);
  1232. return !ok;
  1233. ])],
  1234. [tor_cv_can_use_curve25519_donna_c64=cross],
  1235. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1236. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1237. nacl/crypto_scalarmult_curve25519.h])
  1238. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1239. tor_cv_can_use_curve25519_nacl,
  1240. [tor_saved_LIBS="$LIBS"
  1241. LIBS="$LIBS -lnacl"
  1242. AC_LINK_IFELSE(
  1243. [AC_LANG_PROGRAM([dnl
  1244. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1245. #include <crypto_scalarmult_curve25519.h>
  1246. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1247. #include <nacl/crypto_scalarmult_curve25519.h>
  1248. #endif
  1249. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1250. #error Hey, this is the reference implementation! That's not fast.
  1251. #endif
  1252. ], [
  1253. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1254. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1255. [tor_cv_can_use_curve25519_nacl=no])
  1256. LIBS="$tor_saved_LIBS" ])
  1257. dnl Okay, now we need to figure out which one to actually use. Fall back
  1258. dnl to curve25519-donna.c
  1259. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1260. build_curve25519_donna_c64=yes
  1261. use_curve25519_donna=yes
  1262. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1263. use_curve25519_nacl=yes
  1264. CURVE25519_LIBS=-lnacl
  1265. else
  1266. build_curve25519_donna=yes
  1267. use_curve25519_donna=yes
  1268. fi
  1269. if test "x$use_curve25519_donna" = "xyes"; then
  1270. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1271. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1272. fi
  1273. if test "x$use_curve25519_nacl" = "xyes"; then
  1274. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1275. [Defined if we should use a curve25519 from nacl])
  1276. fi
  1277. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1278. test "x$build_curve25519_donna" = "xyes")
  1279. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1280. test "x$build_curve25519_donna_c64" = "xyes")
  1281. AC_SUBST(CURVE25519_LIBS)
  1282. dnl Make sure to enable support for large off_t if available.
  1283. AC_SYS_LARGEFILE
  1284. AC_CHECK_HEADERS([errno.h \
  1285. fcntl.h \
  1286. signal.h \
  1287. string.h \
  1288. sys/capability.h \
  1289. sys/fcntl.h \
  1290. sys/stat.h \
  1291. sys/time.h \
  1292. sys/types.h \
  1293. time.h \
  1294. unistd.h \
  1295. arpa/inet.h \
  1296. crt_externs.h \
  1297. execinfo.h \
  1298. gnu/libc-version.h \
  1299. grp.h \
  1300. ifaddrs.h \
  1301. inttypes.h \
  1302. limits.h \
  1303. linux/types.h \
  1304. mach/vm_inherit.h \
  1305. machine/limits.h \
  1306. malloc.h \
  1307. malloc/malloc.h \
  1308. malloc_np.h \
  1309. netdb.h \
  1310. netinet/in.h \
  1311. netinet/in6.h \
  1312. pwd.h \
  1313. readpassphrase.h \
  1314. stdatomic.h \
  1315. sys/eventfd.h \
  1316. sys/file.h \
  1317. sys/ioctl.h \
  1318. sys/limits.h \
  1319. sys/mman.h \
  1320. sys/param.h \
  1321. sys/prctl.h \
  1322. sys/random.h \
  1323. sys/resource.h \
  1324. sys/select.h \
  1325. sys/socket.h \
  1326. sys/statvfs.h \
  1327. sys/syscall.h \
  1328. sys/sysctl.h \
  1329. sys/syslimits.h \
  1330. sys/time.h \
  1331. sys/types.h \
  1332. sys/un.h \
  1333. sys/utime.h \
  1334. sys/wait.h \
  1335. syslog.h \
  1336. utime.h])
  1337. AC_CHECK_HEADERS(sys/param.h)
  1338. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1339. [#ifdef HAVE_SYS_TYPES_H
  1340. #include <sys/types.h>
  1341. #endif
  1342. #ifdef HAVE_SYS_SOCKET_H
  1343. #include <sys/socket.h>
  1344. #endif])
  1345. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1346. [#ifdef HAVE_SYS_TYPES_H
  1347. #include <sys/types.h>
  1348. #endif
  1349. #ifdef HAVE_SYS_SOCKET_H
  1350. #include <sys/socket.h>
  1351. #endif
  1352. #ifdef HAVE_NET_IF_H
  1353. #include <net/if.h>
  1354. #endif
  1355. #ifdef HAVE_NETINET_IN_H
  1356. #include <netinet/in.h>
  1357. #endif])
  1358. AC_CHECK_HEADERS(linux/if.h,[],[],
  1359. [
  1360. #ifdef HAVE_SYS_SOCKET_H
  1361. #include <sys/socket.h>
  1362. #endif
  1363. ])
  1364. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1365. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1366. [#ifdef HAVE_SYS_TYPES_H
  1367. #include <sys/types.h>
  1368. #endif
  1369. #ifdef HAVE_SYS_SOCKET_H
  1370. #include <sys/socket.h>
  1371. #endif
  1372. #ifdef HAVE_LIMITS_H
  1373. #include <limits.h>
  1374. #endif
  1375. #ifdef HAVE_LINUX_TYPES_H
  1376. #include <linux/types.h>
  1377. #endif
  1378. #ifdef HAVE_NETINET_IN6_H
  1379. #include <netinet/in6.h>
  1380. #endif
  1381. #ifdef HAVE_NETINET_IN_H
  1382. #include <netinet/in.h>
  1383. #endif])
  1384. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1385. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1386. [#ifdef HAVE_SYS_TYPES_H
  1387. #include <sys/types.h>
  1388. #endif
  1389. #ifdef HAVE_SYS_SOCKET_H
  1390. #include <sys/socket.h>
  1391. #endif
  1392. #ifdef HAVE_LIMITS_H
  1393. #include <limits.h>
  1394. #endif
  1395. #ifdef HAVE_LINUX_TYPES_H
  1396. #include <linux/types.h>
  1397. #endif
  1398. #ifdef HAVE_NETINET_IN6_H
  1399. #include <netinet/in6.h>
  1400. #endif
  1401. #ifdef HAVE_NETINET_IN_H
  1402. #include <netinet/in.h>
  1403. #endif
  1404. #ifdef HAVE_LINUX_IF_H
  1405. #include <linux/if.h>
  1406. #endif])
  1407. transparent_ok=0
  1408. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1409. transparent_ok=1
  1410. fi
  1411. if test "x$linux_netfilter_ipv4" = "x1"; then
  1412. transparent_ok=1
  1413. fi
  1414. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1415. transparent_ok=1
  1416. fi
  1417. if test "x$transparent_ok" = "x1"; then
  1418. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1419. else
  1420. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1421. fi
  1422. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1423. [#ifdef HAVE_SYS_TYPES_H
  1424. #include <sys/types.h>
  1425. #endif
  1426. #ifdef HAVE_SYS_TIME_H
  1427. #include <sys/time.h>
  1428. #endif])
  1429. AC_CHECK_SIZEOF(char)
  1430. AC_CHECK_SIZEOF(short)
  1431. AC_CHECK_SIZEOF(int)
  1432. AC_CHECK_SIZEOF(unsigned int)
  1433. AC_CHECK_SIZEOF(long)
  1434. AC_CHECK_SIZEOF(long long)
  1435. AC_CHECK_SIZEOF(__int64)
  1436. AC_CHECK_SIZEOF(void *)
  1437. AC_CHECK_SIZEOF(time_t)
  1438. AC_CHECK_SIZEOF(size_t)
  1439. AC_CHECK_SIZEOF(pid_t)
  1440. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1441. AC_PC_FROM_UCONTEXT([:])
  1442. dnl used to include sockaddr_storage, but everybody has that.
  1443. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1444. [#ifdef HAVE_SYS_TYPES_H
  1445. #include <sys/types.h>
  1446. #endif
  1447. #ifdef HAVE_NETINET_IN_H
  1448. #include <netinet/in.h>
  1449. #endif
  1450. #ifdef HAVE_NETINET_IN6_H
  1451. #include <netinet/in6.h>
  1452. #endif
  1453. #ifdef HAVE_SYS_SOCKET_H
  1454. #include <sys/socket.h>
  1455. #endif
  1456. #ifdef _WIN32
  1457. #define _WIN32_WINNT 0x0501
  1458. #define WIN32_LEAN_AND_MEAN
  1459. #include <winsock2.h>
  1460. #include <ws2tcpip.h>
  1461. #endif
  1462. ])
  1463. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1464. [#ifdef HAVE_SYS_TYPES_H
  1465. #include <sys/types.h>
  1466. #endif
  1467. #ifdef HAVE_NETINET_IN_H
  1468. #include <netinet/in.h>
  1469. #endif
  1470. #ifdef HAVE_NETINET_IN6_H
  1471. #include <netinet/in6.h>
  1472. #endif
  1473. #ifdef HAVE_SYS_SOCKET_H
  1474. #include <sys/socket.h>
  1475. #endif
  1476. #ifdef _WIN32
  1477. #define _WIN32_WINNT 0x0501
  1478. #define WIN32_LEAN_AND_MEAN
  1479. #include <winsock2.h>
  1480. #include <ws2tcpip.h>
  1481. #endif
  1482. ])
  1483. AC_CHECK_TYPES([rlim_t], , ,
  1484. [#ifdef HAVE_SYS_TYPES_H
  1485. #include <sys/types.h>
  1486. #endif
  1487. #ifdef HAVE_SYS_TIME_H
  1488. #include <sys/time.h>
  1489. #endif
  1490. #ifdef HAVE_SYS_RESOURCE_H
  1491. #include <sys/resource.h>
  1492. #endif
  1493. ])
  1494. AX_CHECK_SIGN([time_t],
  1495. [ : ],
  1496. [ : ], [
  1497. #ifdef HAVE_SYS_TYPES_H
  1498. #include <sys/types.h>
  1499. #endif
  1500. #ifdef HAVE_SYS_TIME_H
  1501. #include <sys/time.h>
  1502. #endif
  1503. #ifdef HAVE_TIME_H
  1504. #include <time.h>
  1505. #endif
  1506. ])
  1507. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1508. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1509. fi
  1510. AX_CHECK_SIGN([size_t],
  1511. [ tor_cv_size_t_signed=yes ],
  1512. [ tor_cv_size_t_signed=no ], [
  1513. #ifdef HAVE_SYS_TYPES_H
  1514. #include <sys/types.h>
  1515. #endif
  1516. ])
  1517. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1518. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1519. fi
  1520. AX_CHECK_SIGN([enum always],
  1521. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1522. [ : ], [
  1523. enum always { AAA, BBB, CCC };
  1524. ])
  1525. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1526. #ifdef HAVE_SYS_SOCKET_H
  1527. #include <sys/socket.h>
  1528. #endif
  1529. ])
  1530. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1531. AC_CHECK_SIZEOF(cell_t)
  1532. # Let's see if stdatomic works. (There are some debian clangs that screw it
  1533. # up; see Tor bug #26779 and debian bug 903709.)
  1534. AC_CACHE_CHECK([whether C11 stdatomic.h actually works],
  1535. tor_cv_stdatomic_works,
  1536. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1537. #include <stdatomic.h>
  1538. struct x { atomic_size_t y; };
  1539. void try_atomic_init(struct x *xx)
  1540. {
  1541. atomic_init(&xx->y, 99);
  1542. atomic_fetch_add(&xx->y, 1);
  1543. }
  1544. ]])], [tor_cv_stdatomic_works=yes], [tor_cv_stdatomic_works=no])])
  1545. if test "$tor_cv_stdatomic_works" = "yes"; then
  1546. AC_DEFINE(STDATOMIC_WORKS, 1, [Set to 1 if we can compile a simple stdatomic example.])
  1547. elif test "$ac_cv_header_stdatomic_h" = "yes"; then
  1548. 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 ])
  1549. fi
  1550. # Now make sure that NULL can be represented as zero bytes.
  1551. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1552. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1553. [[#include <stdlib.h>
  1554. #include <string.h>
  1555. #include <stdio.h>
  1556. #ifdef HAVE_STDDEF_H
  1557. #include <stddef.h>
  1558. #endif
  1559. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1560. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1561. [tor_cv_null_is_zero=yes],
  1562. [tor_cv_null_is_zero=no],
  1563. [tor_cv_null_is_zero=cross])])
  1564. if test "$tor_cv_null_is_zero" = "cross"; then
  1565. # Cross-compiling; let's hope that the target isn't raving mad.
  1566. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1567. fi
  1568. if test "$tor_cv_null_is_zero" != "no"; then
  1569. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1570. [Define to 1 iff memset(0) sets pointers to NULL])
  1571. fi
  1572. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1573. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1574. [[#include <stdlib.h>
  1575. #include <string.h>
  1576. #include <stdio.h>
  1577. #ifdef HAVE_STDDEF_H
  1578. #include <stddef.h>
  1579. #endif
  1580. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1581. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1582. [tor_cv_dbl0_is_zero=yes],
  1583. [tor_cv_dbl0_is_zero=no],
  1584. [tor_cv_dbl0_is_zero=cross])])
  1585. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1586. # Cross-compiling; let's hope that the target isn't raving mad.
  1587. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1588. fi
  1589. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1590. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1591. [Define to 1 iff memset(0) sets doubles to 0.0])
  1592. fi
  1593. # And what happens when we malloc zero?
  1594. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1595. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1596. [[#include <stdlib.h>
  1597. #include <string.h>
  1598. #include <stdio.h>
  1599. #ifdef HAVE_STDDEF_H
  1600. #include <stddef.h>
  1601. #endif
  1602. int main () { return malloc(0)?0:1; }]])],
  1603. [tor_cv_malloc_zero_works=yes],
  1604. [tor_cv_malloc_zero_works=no],
  1605. [tor_cv_malloc_zero_works=cross])])
  1606. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1607. # Cross-compiling; let's hope that the target isn't raving mad.
  1608. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1609. fi
  1610. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1611. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1612. [Define to 1 iff malloc(0) returns a pointer])
  1613. fi
  1614. # whether we seem to be in a 2s-complement world.
  1615. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1616. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1617. [[int main () { int problem = ((-99) != (~99)+1);
  1618. return problem ? 1 : 0; }]])],
  1619. [tor_cv_twos_complement=yes],
  1620. [tor_cv_twos_complement=no],
  1621. [tor_cv_twos_complement=cross])])
  1622. if test "$tor_cv_twos_complement" = "cross"; then
  1623. # Cross-compiling; let's hope that the target isn't raving mad.
  1624. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1625. fi
  1626. if test "$tor_cv_twos_complement" != "no"; then
  1627. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1628. [Define to 1 iff we represent negative integers with
  1629. two's complement])
  1630. fi
  1631. # What does shifting a negative value do?
  1632. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1633. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1634. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1635. [tor_cv_sign_extend=yes],
  1636. [tor_cv_sign_extend=no],
  1637. [tor_cv_sign_extend=cross])])
  1638. if test "$tor_cv_sign_extend" = "cross"; then
  1639. # Cross-compiling; let's hope that the target isn't raving mad.
  1640. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1641. fi
  1642. if test "$tor_cv_sign_extend" != "no"; then
  1643. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1644. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1645. fi
  1646. # Is uint8_t the same type as unsigned char?
  1647. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1648. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1649. #include <stdint.h>
  1650. extern uint8_t c;
  1651. unsigned char c;]])],
  1652. [tor_cv_uint8_uchar=yes],
  1653. [tor_cv_uint8_uchar=no],
  1654. [tor_cv_uint8_uchar=cross])])
  1655. if test "$tor_cv_uint8_uchar" = "cross"; then
  1656. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1657. fi
  1658. if test "$tor_cv_uint8_uchar" = "no"; then
  1659. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1660. fi
  1661. AC_ARG_WITH(tcmalloc,
  1662. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library. Deprecated; see --with-malloc]),
  1663. [ tcmalloc=yes ], [ tcmalloc=no ])
  1664. default_malloc=system
  1665. if test "x$enable_openbsd_malloc" = "xyes" ; then
  1666. AC_MSG_NOTICE([The --enable-openbsd-malloc argument is deprecated; use --with-malloc=openbsd instead.])
  1667. default_malloc=openbsd
  1668. fi
  1669. if test "x$tcmalloc" = "xyes"; then
  1670. AC_MSG_NOTICE([The --with-tcmalloc argument is deprecated; use --with-malloc=tcmalloc instead.])
  1671. default_malloc=tcmalloc
  1672. fi
  1673. AC_ARG_WITH(malloc,
  1674. AS_HELP_STRING([--with-malloc=[system,jemalloc,tcmalloc,openbsd]],
  1675. [select special malloc implementation [system]]),
  1676. [ malloc="$with_malloc" ], [ malloc="$default_malloc" ])
  1677. AS_CASE([$malloc],
  1678. [tcmalloc], [
  1679. PKG_CHECK_MODULES([TCMALLOC],
  1680. [libtcmalloc],
  1681. have_tcmalloc=yes,
  1682. have_tcmalloc=no)
  1683. if test "x$have_tcmalloc" = "xno" ; then
  1684. AC_MSG_ERROR([Unable to find tcmalloc requested by --with-malloc.])
  1685. fi
  1686. CFLAGS="$CFLAGS $TCMALLOC_CFLAGS"
  1687. LIBS="$TCMALLOC_LIBS $LIBS"
  1688. ],
  1689. [jemalloc], [
  1690. PKG_CHECK_MODULES([JEMALLOC],
  1691. [jemalloc],
  1692. have_jemalloc=yes,
  1693. have_jemalloc=no)
  1694. if test "x$have_tcmalloc" = "xno" ; then
  1695. AC_MSG_ERROR([Unable to find jemalloc requested by --with-malloc.])
  1696. fi
  1697. CFLAGS="$CFLAGS $JEMALLOC_CFLAGS"
  1698. LIBS="$JEMALLOC_LIBS $LIBS"
  1699. using_custom_malloc=yes
  1700. ],
  1701. [openbsd], [
  1702. AC_MSG_WARN([The openbsd malloc port is deprecated in Tor 0.3.5 and will be removed in a future version.])
  1703. enable_openbsd_malloc=yes
  1704. ],
  1705. [system], [
  1706. # handle this later, including the jemalloc fallback
  1707. AC_CHECK_FUNCS(mallinfo)
  1708. ],
  1709. [AC_MSG_ERROR([--with-malloc=`$with_malloc' not supported, see --help])
  1710. ])
  1711. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  1712. if test "$malloc" != "system"; then
  1713. # Tell the C compiler not to use the system allocator functions.
  1714. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1715. fi
  1716. if test "$using_custom_malloc" = "yes"; then
  1717. # Tell the C compiler not to use the system allocator functions.
  1718. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1719. fi
  1720. # By default, we're going to assume we don't have mlockall()
  1721. # bionic and other platforms have various broken mlockall subsystems.
  1722. # Some systems don't have a working mlockall, some aren't linkable,
  1723. # and some have it but don't declare it.
  1724. AC_CHECK_FUNCS(mlockall)
  1725. AC_CHECK_DECLS([mlockall], , , [
  1726. #ifdef HAVE_SYS_MMAN_H
  1727. #include <sys/mman.h>
  1728. #endif])
  1729. # Allow user to specify an alternate syslog facility
  1730. AC_ARG_WITH(syslog-facility,
  1731. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1732. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1733. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1734. AC_SUBST(LOGFACILITY)
  1735. # Check if we have getresuid and getresgid
  1736. AC_CHECK_FUNCS(getresuid getresgid)
  1737. # Check for gethostbyname_r in all its glorious incompatible versions.
  1738. # (This logic is based on that in Python's configure.in)
  1739. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1740. [Define this if you have any gethostbyname_r()])
  1741. AC_CHECK_FUNC(gethostbyname_r, [
  1742. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1743. OLD_CFLAGS=$CFLAGS
  1744. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1745. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1746. #include <netdb.h>
  1747. ]], [[
  1748. char *cp1, *cp2;
  1749. struct hostent *h1, *h2;
  1750. int i1, i2;
  1751. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1752. ]])],[
  1753. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1754. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1755. [Define this if gethostbyname_r takes 6 arguments])
  1756. AC_MSG_RESULT(6)
  1757. ], [
  1758. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1759. #include <netdb.h>
  1760. ]], [[
  1761. char *cp1, *cp2;
  1762. struct hostent *h1;
  1763. int i1, i2;
  1764. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1765. ]])], [
  1766. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1767. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1768. [Define this if gethostbyname_r takes 5 arguments])
  1769. AC_MSG_RESULT(5)
  1770. ], [
  1771. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1772. #include <netdb.h>
  1773. ]], [[
  1774. char *cp1;
  1775. struct hostent *h1;
  1776. struct hostent_data hd;
  1777. (void) gethostbyname_r(cp1,h1,&hd);
  1778. ]])], [
  1779. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1780. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1781. [Define this if gethostbyname_r takes 3 arguments])
  1782. AC_MSG_RESULT(3)
  1783. ], [
  1784. AC_MSG_RESULT(0)
  1785. ])
  1786. ])
  1787. ])
  1788. CFLAGS=$OLD_CFLAGS
  1789. ])
  1790. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1791. tor_cv_have_func_macro,
  1792. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1793. #include <stdio.h>
  1794. int main(int c, char **v) { puts(__func__); }])],
  1795. tor_cv_have_func_macro=yes,
  1796. tor_cv_have_func_macro=no))
  1797. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1798. tor_cv_have_FUNC_macro,
  1799. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1800. #include <stdio.h>
  1801. int main(int c, char **v) { puts(__FUNC__); }])],
  1802. tor_cv_have_FUNC_macro=yes,
  1803. tor_cv_have_FUNC_macro=no))
  1804. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1805. tor_cv_have_FUNCTION_macro,
  1806. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1807. #include <stdio.h>
  1808. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1809. tor_cv_have_FUNCTION_macro=yes,
  1810. tor_cv_have_FUNCTION_macro=no))
  1811. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1812. tor_cv_have_environ_declared,
  1813. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1814. #ifdef HAVE_UNISTD_H
  1815. #include <unistd.h>
  1816. #endif
  1817. #include <stdlib.h>
  1818. int main(int c, char **v) { char **t = environ; }])],
  1819. tor_cv_have_environ_declared=yes,
  1820. tor_cv_have_environ_declared=no))
  1821. if test "$tor_cv_have_func_macro" = "yes"; then
  1822. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1823. fi
  1824. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1825. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1826. fi
  1827. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1828. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1829. [Defined if the compiler supports __FUNCTION__])
  1830. fi
  1831. if test "$tor_cv_have_environ_declared" = "yes"; then
  1832. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1833. [Defined if we have extern char **environ already declared])
  1834. fi
  1835. # $prefix stores the value of the --prefix command line option, or
  1836. # NONE if the option wasn't set. In the case that it wasn't set, make
  1837. # it be the default, so that we can use it to expand directories now.
  1838. if test "x$prefix" = "xNONE"; then
  1839. prefix=$ac_default_prefix
  1840. fi
  1841. # and similarly for $exec_prefix
  1842. if test "x$exec_prefix" = "xNONE"; then
  1843. exec_prefix=$prefix
  1844. fi
  1845. if test "x$BUILDDIR" = "x"; then
  1846. BUILDDIR=`pwd`
  1847. fi
  1848. AC_SUBST(BUILDDIR)
  1849. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1850. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1851. if test "x$SRCDIR" = "x"; then
  1852. SRCDIR=$(cd "$srcdir"; pwd)
  1853. fi
  1854. AH_TEMPLATE([SRCDIR],[tor's sourcedir directory])
  1855. AC_DEFINE_UNQUOTED(SRCDIR,"$SRCDIR")
  1856. if test "x$CONFDIR" = "x"; then
  1857. CONFDIR=`eval echo $sysconfdir/tor`
  1858. fi
  1859. AC_SUBST(CONFDIR)
  1860. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1861. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1862. BINDIR=`eval echo $bindir`
  1863. AC_SUBST(BINDIR)
  1864. LOCALSTATEDIR=`eval echo $localstatedir`
  1865. AC_SUBST(LOCALSTATEDIR)
  1866. if test "$bwin32" = "true"; then
  1867. # Test if the linker supports the --nxcompat and --dynamicbase options
  1868. # for Windows
  1869. save_LDFLAGS="$LDFLAGS"
  1870. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1871. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1872. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1873. [AC_MSG_RESULT([yes])]
  1874. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1875. [AC_MSG_RESULT([no])]
  1876. )
  1877. LDFLAGS="$save_LDFLAGS"
  1878. fi
  1879. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1880. # than autoconf's macros like.
  1881. if test "$GCC" = "yes"; then
  1882. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1883. # accident waiting to happen.
  1884. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1885. else
  1886. # Override optimization level for non-gcc compilers
  1887. CFLAGS="$CFLAGS -O"
  1888. enable_gcc_warnings=no
  1889. enable_gcc_warnings_advisory=no
  1890. fi
  1891. # Warnings implies advisory-warnings and -Werror.
  1892. if test "$enable_gcc_warnings" = "yes"; then
  1893. enable_gcc_warnings_advisory=yes
  1894. enable_fatal_warnings=yes
  1895. fi
  1896. # OS X Lion started deprecating the system openssl. Let's just disable
  1897. # all deprecation warnings on OS X. Also, to potentially make the binary
  1898. # a little smaller, let's enable dead_strip.
  1899. case "$host_os" in
  1900. darwin*)
  1901. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1902. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1903. esac
  1904. TOR_WARNING_FLAGS=""
  1905. # Add some more warnings which we use in development but not in the
  1906. # released versions. (Some relevant gcc versions can't handle these.)
  1907. #
  1908. # Note that we have to do this near the end of the autoconf process, or
  1909. # else we may run into problems when these warnings hit on the testing C
  1910. # programs that autoconf wants to build.
  1911. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1912. case "$host" in
  1913. *-*-openbsd* | *-*-bitrig*)
  1914. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1915. # That's fine, except that the headers don't pass -Wredundant-decls.
  1916. # Therefore, let's disable -Wsystem-headers when we're building
  1917. # with maximal warnings on OpenBSD.
  1918. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1919. esac
  1920. CFLAGS_NOWARNINGS="$CFLAGS"
  1921. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1922. # have it work better.
  1923. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1924. # This warning was added in gcc 4.3, but it appears to generate
  1925. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1926. #CFLAGS="$CFLAGS -Wlogical-op"
  1927. m4_foreach_w([warning_flag], [
  1928. -Waddress
  1929. -Waddress-of-array-temporary
  1930. -Waddress-of-temporary
  1931. -Wambiguous-macro
  1932. -Wanonymous-pack-parens
  1933. -Warc
  1934. -Warc-abi
  1935. -Warc-bridge-casts-disallowed-in-nonarc
  1936. -Warc-maybe-repeated-use-of-weak
  1937. -Warc-performSelector-leaks
  1938. -Warc-repeated-use-of-weak
  1939. -Warray-bounds
  1940. -Warray-bounds-pointer-arithmetic
  1941. -Wasm
  1942. -Wasm-operand-widths
  1943. -Watomic-properties
  1944. -Watomic-property-with-user-defined-accessor
  1945. -Wauto-import
  1946. -Wauto-storage-class
  1947. -Wauto-var-id
  1948. -Wavailability
  1949. -Wbackslash-newline-escape
  1950. -Wbad-array-new-length
  1951. -Wbind-to-temporary-copy
  1952. -Wbitfield-constant-conversion
  1953. -Wbool-conversion
  1954. -Wbool-conversions
  1955. -Wbuiltin-requires-header
  1956. -Wchar-align
  1957. -Wcompare-distinct-pointer-types
  1958. -Wcomplex-component-init
  1959. -Wconditional-type-mismatch
  1960. -Wconfig-macros
  1961. -Wconstant-conversion
  1962. -Wconstant-logical-operand
  1963. -Wconstexpr-not-const
  1964. -Wcustom-atomic-properties
  1965. -Wdangling-field
  1966. -Wdangling-initializer-list
  1967. -Wdate-time
  1968. -Wdelegating-ctor-cycles
  1969. -Wdeprecated-implementations
  1970. -Wdeprecated-register
  1971. -Wdirect-ivar-access
  1972. -Wdiscard-qual
  1973. -Wdistributed-object-modifiers
  1974. -Wdivision-by-zero
  1975. -Wdollar-in-identifier-extension
  1976. -Wdouble-promotion
  1977. -Wduplicate-decl-specifier
  1978. -Wduplicate-enum
  1979. -Wduplicate-method-arg
  1980. -Wduplicate-method-match
  1981. -Wduplicated-cond
  1982. -Wdynamic-class-memaccess
  1983. -Wembedded-directive
  1984. -Wempty-translation-unit
  1985. -Wenum-conversion
  1986. -Wexit-time-destructors
  1987. -Wexplicit-ownership-type
  1988. -Wextern-initializer
  1989. -Wextra
  1990. -Wextra-semi
  1991. -Wextra-tokens
  1992. -Wflexible-array-extensions
  1993. -Wfloat-conversion
  1994. -Wformat-non-iso
  1995. -Wfour-char-constants
  1996. -Wgcc-compat
  1997. -Wglobal-constructors
  1998. -Wgnu-array-member-paren-init
  1999. -Wgnu-designator
  2000. -Wgnu-static-float-init
  2001. -Wheader-guard
  2002. -Wheader-hygiene
  2003. -Widiomatic-parentheses
  2004. -Wignored-attributes
  2005. -Wimplicit-atomic-properties
  2006. -Wimplicit-conversion-floating-point-to-bool
  2007. -Wimplicit-exception-spec-mismatch
  2008. -Wimplicit-fallthrough
  2009. -Wimplicit-fallthrough-per-function
  2010. -Wimplicit-retain-self
  2011. -Wimport-preprocessor-directive-pedantic
  2012. -Wincompatible-library-redeclaration
  2013. -Wincompatible-pointer-types-discards-qualifiers
  2014. -Wincomplete-implementation
  2015. -Wincomplete-module
  2016. -Wincomplete-umbrella
  2017. -Winit-self
  2018. -Wint-conversions
  2019. -Wint-to-void-pointer-cast
  2020. -Winteger-overflow
  2021. -Winvalid-constexpr
  2022. -Winvalid-iboutlet
  2023. -Winvalid-noreturn
  2024. -Winvalid-pp-token
  2025. -Winvalid-source-encoding
  2026. -Winvalid-token-paste
  2027. -Wknr-promoted-parameter
  2028. -Wlarge-by-value-copy
  2029. -Wliteral-conversion
  2030. -Wliteral-range
  2031. -Wlocal-type-template-args
  2032. -Wlogical-op
  2033. -Wloop-analysis
  2034. -Wmain-return-type
  2035. -Wmalformed-warning-check
  2036. -Wmethod-signatures
  2037. -Wmicrosoft
  2038. -Wmicrosoft-exists
  2039. -Wmismatched-parameter-types
  2040. -Wmismatched-return-types
  2041. -Wmissing-field-initializers
  2042. -Wmissing-format-attribute
  2043. -Wmissing-noreturn
  2044. -Wmissing-selector-name
  2045. -Wmissing-sysroot
  2046. -Wmissing-variable-declarations
  2047. -Wmodule-conflict
  2048. -Wnested-anon-types
  2049. -Wnewline-eof
  2050. -Wnon-literal-null-conversion
  2051. -Wnon-pod-varargs
  2052. -Wnonportable-cfstrings
  2053. -Wnormalized=nfkc
  2054. -Wnull-arithmetic
  2055. -Wnull-character
  2056. -Wnull-conversion
  2057. -Wnull-dereference
  2058. -Wout-of-line-declaration
  2059. -Wover-aligned
  2060. -Woverlength-strings
  2061. -Woverride-init
  2062. -Woverriding-method-mismatch
  2063. -Wpointer-type-mismatch
  2064. -Wpredefined-identifier-outside-function
  2065. -Wprotocol-property-synthesis-ambiguity
  2066. -Wreadonly-iboutlet-property
  2067. -Wreadonly-setter-attrs
  2068. -Wreceiver-expr
  2069. -Wreceiver-forward-class
  2070. -Wreceiver-is-weak
  2071. -Wreinterpret-base-class
  2072. -Wrequires-super-attribute
  2073. -Wreserved-user-defined-literal
  2074. -Wreturn-stack-address
  2075. -Wsection
  2076. -Wselector-type-mismatch
  2077. -Wsentinel
  2078. -Wserialized-diagnostics
  2079. -Wshadow
  2080. -Wshift-count-negative
  2081. -Wshift-count-overflow
  2082. -Wshift-negative-value
  2083. -Wshift-overflow=2
  2084. -Wshift-sign-overflow
  2085. -Wshorten-64-to-32
  2086. -Wsizeof-array-argument
  2087. -Wsource-uses-openmp
  2088. -Wstatic-float-init
  2089. -Wstatic-in-inline
  2090. -Wstatic-local-in-inline
  2091. -Wstrict-overflow=1
  2092. -Wstring-compare
  2093. -Wstring-conversion
  2094. -Wstrlcpy-strlcat-size
  2095. -Wstrncat-size
  2096. -Wsuggest-attribute=format
  2097. -Wsuggest-attribute=noreturn
  2098. -Wsuper-class-method-mismatch
  2099. -Wswitch-bool
  2100. -Wsync-nand
  2101. -Wtautological-constant-out-of-range-compare
  2102. -Wtentative-definition-incomplete-type
  2103. -Wtrampolines
  2104. -Wtype-safety
  2105. -Wtypedef-redefinition
  2106. -Wtypename-missing
  2107. -Wundefined-inline
  2108. -Wundefined-internal
  2109. -Wundefined-reinterpret-cast
  2110. -Wunicode
  2111. -Wunicode-whitespace
  2112. -Wunknown-warning-option
  2113. -Wunnamed-type-template-args
  2114. -Wunneeded-member-function
  2115. -Wunsequenced
  2116. -Wunsupported-visibility
  2117. -Wunused-but-set-parameter
  2118. -Wunused-but-set-variable
  2119. -Wunused-command-line-argument
  2120. -Wunused-const-variable=2
  2121. -Wunused-exception-parameter
  2122. -Wunused-local-typedefs
  2123. -Wunused-member-function
  2124. -Wunused-sanitize-argument
  2125. -Wunused-volatile-lvalue
  2126. -Wuser-defined-literals
  2127. -Wvariadic-macros
  2128. -Wvector-conversion
  2129. -Wvector-conversions
  2130. -Wvexing-parse
  2131. -Wvisibility
  2132. -Wvla-extension
  2133. -Wzero-length-array
  2134. ], [ TOR_TRY_COMPILE_WITH_CFLAGS(warning_flag, [],
  2135. [TOR_WARNING_FLAGS="$TOR_WARNING_FLAGS warning_flag" CFLAGS="$CFLAGS warning_flag"], true)
  2136. ])
  2137. dnl We should re-enable this in some later version. Clang doesn't
  2138. dnl mind, but it causes trouble with GCC.
  2139. dnl -Wstrict-overflow=2
  2140. dnl These seem to require annotations that we don't currently use,
  2141. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  2142. dnl -Wthread-safety
  2143. dnl -Wthread-safety-analysis
  2144. dnl -Wthread-safety-attributes
  2145. dnl -Wthread-safety-beta
  2146. dnl -Wthread-safety-precise
  2147. W_FLAGS="$W_FLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  2148. W_FLAGS="$W_FLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  2149. W_FLAGS="$W_FLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  2150. W_FLAGS="$W_FLAGS -Wwrite-strings"
  2151. W_FLAGS="$W_FLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  2152. W_FLAGS="$W_FLAGS -Waggregate-return -Wpacked -Wunused"
  2153. W_FLAGS="$W_FLAGS -Wunused-parameter "
  2154. # These interfere with building main() { return 0; }, which autoconf
  2155. # likes to use as its default program.
  2156. W_FLAGS="$W_FLAGS -Wold-style-definition -Wmissing-declarations"
  2157. TOR_WARNING_FLAGS="$TOR_WARNING_FLAGS $W_FLAGS"
  2158. CFLAGS="$CFLAGS $W_FLAGS"
  2159. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  2160. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  2161. fi
  2162. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  2163. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  2164. fi
  2165. if test "$tor_cv_cflags__warn_unused_const_variable_2" = "yes"; then
  2166. AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
  2167. fi
  2168. CFLAGS="$CFLAGS_NOWARNINGS"
  2169. if test "x$enable_fatal_warnings" = "xyes"; then
  2170. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  2171. # default autoconf programs are full of errors.
  2172. CFLAGS="$CFLAGS -Werror"
  2173. fi
  2174. fi
  2175. AC_SUBST(TOR_WARNING_FLAGS)
  2176. echo "$TOR_WARNING_FLAGS">warning_flags
  2177. TOR_TRY_COMPILE_WITH_CFLAGS([@warning_flags], [],
  2178. CFLAGS="$CFLAGS @warning_flags",
  2179. CFLAGS="$CFLAGS $TOR_WARNING_FLAGS")
  2180. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  2181. case "$host_os" in
  2182. darwin*)
  2183. 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.])
  2184. esac
  2185. fi
  2186. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  2187. AC_CONFIG_FILES([
  2188. Doxyfile
  2189. Makefile
  2190. config.rust
  2191. contrib/operator-tools/tor.logrotate
  2192. contrib/dist/tor.service
  2193. src/config/torrc.sample
  2194. src/config/torrc.minimal
  2195. src/rust/.cargo/config
  2196. scripts/maint/checkOptionDocs.pl
  2197. warning_flags
  2198. ])
  2199. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  2200. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  2201. for file in $regular_mans ; do
  2202. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  2203. echo "==================================";
  2204. echo;
  2205. echo "Building Tor has failed since manpages cannot be built.";
  2206. echo;
  2207. echo "You need asciidoc installed to be able to build the manpages.";
  2208. echo "To build without manpages, use the --disable-asciidoc argument";
  2209. echo "when calling configure.";
  2210. echo;
  2211. echo "==================================";
  2212. exit 1;
  2213. fi
  2214. done
  2215. fi
  2216. if test "$fragile_hardening" = "yes"; then
  2217. AC_MSG_WARN([
  2218. ============
  2219. Warning! Building Tor with --enable-fragile-hardening (also known as
  2220. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  2221. other kinds of attacks easier. A Tor instance build with this option will be
  2222. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  2223. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  2224. denial of service attacks. For more information, see
  2225. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  2226. ============
  2227. ])
  2228. fi
  2229. AC_OUTPUT