configure.ac 81 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],[0.4.2.5-dev])
  7. AC_CONFIG_SRCDIR([src/app/main/tor_main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # DO NOT EDIT THIS DEFINITION BY HAND UNLESS YOU KNOW WHAT YOU'RE DOING.
  10. #
  11. # The update_versions.py script updates this definition when the
  12. # version number changes. Tor uses it to make sure that it
  13. # only shuts down for missing "required protocols" when those protocols
  14. # are listed as required by a consensus after this date.
  15. AC_DEFINE(APPROX_RELEASE_DATE, ["2019-12-09"], # for 0.4.2.5-dev
  16. [Approximate date when this software was released. (Updated when the version changes.)])
  17. # "foreign" means we don't follow GNU package layout standards
  18. # "1.11" means we require automake version 1.11 or newer
  19. # "subdir-objects" means put .o files in the same directory as the .c files
  20. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  21. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  22. AC_CONFIG_HEADERS([orconfig.h])
  23. AC_USE_SYSTEM_EXTENSIONS
  24. AC_CANONICAL_HOST
  25. PKG_PROG_PKG_CONFIG
  26. if test "x$PKG_CONFIG" = "x" ; then
  27. pkg_config_user_action="install pkg-config, and check the PKG_CONFIG_PATH environment variable"
  28. AC_MSG_NOTICE([Some libraries need pkg-config, including systemd, nss, lzma, zstd, and custom mallocs.])
  29. AC_MSG_NOTICE([To use those libraries, $pkg_config_user_action.])
  30. else
  31. pkg_config_user_action="check the PKG_CONFIG_PATH environment variable"
  32. fi
  33. if test "x$PKG_CONFIG_PATH" = "x" && test "x$prefix" != "xNONE" && test "$host" != "$build"; then
  34. export PKG_CONFIG_PATH=$prefix/lib/pkgconfig
  35. AC_MSG_NOTICE([set PKG_CONFIG_PATH=$PKG_CONFIG_PATH to support cross-compiling])
  36. fi
  37. AC_ARG_ENABLE(openbsd-malloc,
  38. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only. Deprecated: see --with-malloc]))
  39. AC_ARG_ENABLE(static-openssl,
  40. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  41. AC_ARG_ENABLE(static-libevent,
  42. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  43. AC_ARG_ENABLE(static-zlib,
  44. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  45. AC_ARG_ENABLE(static-tor,
  46. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  47. AC_ARG_ENABLE(unittests,
  48. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  49. AC_ARG_ENABLE(coverage,
  50. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  51. AC_ARG_ENABLE(asserts-in-tests,
  52. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  53. AC_ARG_ENABLE(system-torrc,
  54. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  55. AC_ARG_ENABLE(libfuzzer,
  56. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  57. AC_ARG_ENABLE(oss-fuzz,
  58. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  59. AC_ARG_ENABLE(memory-sentinels,
  60. AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
  61. AC_ARG_ENABLE(rust,
  62. AS_HELP_STRING(--enable-rust, [enable rust integration]))
  63. AC_ARG_ENABLE(cargo-online-mode,
  64. AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
  65. AC_ARG_ENABLE(restart-debugging,
  66. AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
  67. AC_ARG_ENABLE(zstd-advanced-apis,
  68. AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
  69. AC_ARG_ENABLE(nss,
  70. AS_HELP_STRING(--enable-nss, [Use Mozilla's NSS TLS library. (EXPERIMENTAL)]))
  71. AC_ARG_ENABLE(pic,
  72. AS_HELP_STRING(--enable-pic, [Build Tor's binaries as position-independent code, suitable to link as a library.]))
  73. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  74. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  75. fi
  76. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  77. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  78. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  79. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  80. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  81. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  82. AM_CONDITIONAL(USE_NSS, test "x$enable_nss" = "xyes")
  83. AM_CONDITIONAL(USE_OPENSSL, test "x$enable_nss" != "xyes")
  84. if test "x$enable_nss" = "xyes"; then
  85. AC_DEFINE(ENABLE_NSS, 1,
  86. [Defined if we're building with NSS.])
  87. else
  88. AC_DEFINE(ENABLE_OPENSSL, 1,
  89. [Defined if we're building with OpenSSL or LibreSSL])
  90. fi
  91. if test "$enable_static_tor" = "yes"; then
  92. enable_static_libevent="yes";
  93. enable_static_openssl="yes";
  94. enable_static_zlib="yes";
  95. CFLAGS="$CFLAGS -static"
  96. fi
  97. if test "$enable_system_torrc" = "no"; then
  98. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  99. [Defined if we're not going to look for a torrc in SYSCONF])
  100. fi
  101. if test "$enable_memory_sentinels" = "no"; then
  102. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  103. [Defined if we're turning off memory safety code to look for bugs])
  104. fi
  105. AC_ARG_ENABLE(manpage,
  106. AS_HELP_STRING(--disable-manpage, [Disable manpage generation.]))
  107. AC_ARG_ENABLE(html-manual,
  108. AS_HELP_STRING(--disable-html-manual, [Disable HTML documentation.]))
  109. AC_ARG_ENABLE(asciidoc,
  110. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  111. [case "${enableval}" in
  112. "yes") asciidoc=true ;;
  113. "no") asciidoc=false ;;
  114. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  115. esac], [asciidoc=true])
  116. # systemd notify support
  117. AC_ARG_ENABLE(systemd,
  118. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  119. [case "${enableval}" in
  120. "yes") systemd=true ;;
  121. "no") systemd=false ;;
  122. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  123. esac], [systemd=auto])
  124. if test "$enable_restart_debugging" = "yes"; then
  125. AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
  126. [Defined if we're building with support for in-process restart debugging.])
  127. fi
  128. if test "$enable_zstd_advanced_apis" != "no"; then
  129. AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
  130. [Defined if we're going to try to use zstd's "static-only" APIs.])
  131. fi
  132. # systemd support
  133. if test "x$enable_systemd" = "xno"; then
  134. have_systemd=no;
  135. else
  136. PKG_CHECK_MODULES(SYSTEMD,
  137. [libsystemd-daemon],
  138. have_systemd=yes,
  139. have_systemd=no)
  140. if test "x$have_systemd" = "xno"; then
  141. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  142. PKG_CHECK_MODULES(SYSTEMD,
  143. [libsystemd],
  144. have_systemd=yes,
  145. have_systemd=no)
  146. fi
  147. fi
  148. if test "x$have_systemd" = "xyes"; then
  149. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  150. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  151. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  152. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  153. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or greater])], [])
  154. fi
  155. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  156. AC_SUBST(TOR_SYSTEMD_LIBS)
  157. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  158. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found, $pkg_config_user_action, or set SYSTEMD_CFLAGS and SYSTEMD_LIBS.])
  159. fi
  160. case "$host" in
  161. *-*-solaris* )
  162. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  163. ;;
  164. esac
  165. AC_ARG_ENABLE(gcc-warnings,
  166. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  167. AC_ARG_ENABLE(fatal-warnings,
  168. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  169. AC_ARG_ENABLE(gcc-warnings-advisory,
  170. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  171. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  172. AC_ARG_ENABLE(gcc-hardening,
  173. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  174. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  175. AC_ARG_ENABLE(expensive-hardening,
  176. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  177. AC_ARG_ENABLE(fragile-hardening,
  178. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  179. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  180. fragile_hardening="yes"
  181. AC_DEFINE(DEBUG_SMARTLIST, 1, [Enable smartlist debugging])
  182. fi
  183. dnl Linker hardening options
  184. dnl Currently these options are ELF specific - you can't use this with MacOSX
  185. AC_ARG_ENABLE(linker-hardening,
  186. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  187. AC_ARG_ENABLE(local-appdata,
  188. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  189. if test "$enable_local_appdata" = "yes"; then
  190. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  191. [Defined if we default to host local appdata paths on Windows])
  192. fi
  193. AC_ARG_ENABLE(tool-name-check,
  194. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  195. AC_ARG_ENABLE(seccomp,
  196. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  197. AC_ARG_ENABLE(libscrypt,
  198. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  199. dnl Enable event tracing which are transformed to debug log statement.
  200. AC_ARG_ENABLE(event-tracing-debug,
  201. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  202. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  203. if test x$enable_event_tracing_debug = xyes; then
  204. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  205. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  206. fi
  207. dnl Enable Android only features.
  208. AC_ARG_ENABLE(android,
  209. AS_HELP_STRING(--enable-android, [build with Android features enabled]))
  210. AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
  211. if test "x$enable_android" = "xyes"; then
  212. AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
  213. dnl Check if the Android log library is available.
  214. AC_CHECK_HEADERS([android/log.h])
  215. AC_SEARCH_LIBS(__android_log_write, [log])
  216. fi
  217. dnl ---
  218. dnl Tor modules options. These options are namespaced with --disable-module-XXX
  219. dnl ---
  220. dnl All our modules.
  221. m4_define(MODULES, dirauth)
  222. dnl Directory Authority module.
  223. AC_ARG_ENABLE([module-dirauth],
  224. AS_HELP_STRING([--disable-module-dirauth],
  225. [Build tor without the Directory Authority module: tor can not run as a directory authority or bridge authority]))
  226. AM_CONDITIONAL(BUILD_MODULE_DIRAUTH,[test "x$enable_module_dirauth" != "xno"])
  227. AM_COND_IF(BUILD_MODULE_DIRAUTH,
  228. AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
  229. [Compile with Directory Authority feature support]))
  230. dnl Helper variables.
  231. TOR_MODULES_ALL_ENABLED=
  232. AC_DEFUN([ADD_MODULE], [
  233. MODULE=m4_toupper($1)
  234. TOR_MODULES_ALL_ENABLED="${TOR_MODULES_ALL_ENABLED} -DHAVE_MODULE_${MODULE}=1"
  235. ])
  236. m4_foreach_w([module], MODULES, [ADD_MODULE([module])])
  237. AC_SUBST(TOR_MODULES_ALL_ENABLED)
  238. dnl check for the correct "ar" when cross-compiling.
  239. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  240. dnl so kludge up a replacement for the case where it isn't there yet.)
  241. m4_ifdef([AM_PROG_AR],
  242. [AM_PROG_AR],
  243. [AN_MAKEVAR([AR], [AC_PROG_AR])
  244. AN_PROGRAM([ar], [AC_PROG_AR])
  245. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  246. AC_PROG_AR])
  247. dnl Check whether the above macro has settled for a simply named tool even
  248. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  249. dnl because that will find any cc on the system, not only the cross-compiler,
  250. dnl and then verify that a binary built with this compiler runs on the
  251. dnl build system. It will then come to the false conclusion that we're not
  252. dnl cross-compiling.
  253. if test "x$enable_tool_name_check" != "xno"; then
  254. if test "x$ac_tool_warned" = "xyes"; then
  255. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  256. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  257. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  258. fi
  259. fi
  260. AC_PROG_CC
  261. AC_PROG_CPP
  262. AC_PROG_MAKE_SET
  263. AC_PROG_RANLIB
  264. AC_PROG_SED
  265. AC_ARG_VAR([PERL], [path to Perl binary])
  266. AC_CHECK_PROGS([PERL], [perl])
  267. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  268. dnl check for asciidoc and a2x
  269. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  270. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  271. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  272. AM_CONDITIONAL(BUILD_MANPAGE, [test "x$enable_manpage" != "xno"])
  273. AM_CONDITIONAL(BUILD_HTML_DOCS, [test "x$enable_html_manual" != "xno"])
  274. AM_PROG_CC_C_O
  275. AC_PROG_CC_C99
  276. AC_ARG_VAR([PYTHON], [path to Python binary])
  277. AC_CHECK_PROGS(PYTHON, [ \
  278. python3 \
  279. python3.8 python3.7 python3.6 python3.5 python3.4 \
  280. python \
  281. python2 python2.7])
  282. if test "x$PYTHON" = "x"; then
  283. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  284. fi
  285. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  286. dnl List all external rust crates we depend on here. Include the version
  287. rust_crates=" \
  288. digest-0.7.2 \
  289. libc-0.2.39 \
  290. "
  291. AC_SUBST(rust_crates)
  292. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  293. AC_C_FLEXIBLE_ARRAY_MEMBER
  294. ], [
  295. dnl Maybe we've got an old autoconf...
  296. AC_CACHE_CHECK([for flexible array members],
  297. tor_cv_c_flexarray,
  298. [AC_COMPILE_IFELSE(
  299. AC_LANG_PROGRAM([
  300. struct abc { int a; char b[]; };
  301. ], [
  302. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  303. def->b[0] = 33;
  304. ]),
  305. [tor_cv_c_flexarray=yes],
  306. [tor_cv_c_flexarray=no])])
  307. if test "$tor_cv_flexarray" = "yes"; then
  308. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  309. else
  310. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  311. fi
  312. ])
  313. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  314. tor_cv_c_c99_decl,
  315. [AC_COMPILE_IFELSE(
  316. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  317. [tor_cv_c_c99_decl=yes],
  318. [tor_cv_c_c99_decl=no] )])
  319. if test "$tor_cv_c_c99_decl" != "yes"; then
  320. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  321. fi
  322. AC_CACHE_CHECK([for working C99 designated initializers],
  323. tor_cv_c_c99_designated_init,
  324. [AC_COMPILE_IFELSE(
  325. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  326. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  327. [tor_cv_c_c99_designated_init=yes],
  328. [tor_cv_c_c99_designated_init=no] )])
  329. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  330. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  331. fi
  332. TORUSER=_tor
  333. AC_ARG_WITH(tor-user,
  334. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  335. [
  336. TORUSER=$withval
  337. ]
  338. )
  339. AC_SUBST(TORUSER)
  340. TORGROUP=_tor
  341. AC_ARG_WITH(tor-group,
  342. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  343. [
  344. TORGROUP=$withval
  345. ]
  346. )
  347. AC_SUBST(TORGROUP)
  348. dnl If _WIN32 is defined and non-zero, we are building for win32
  349. AC_MSG_CHECKING([for win32])
  350. AC_RUN_IFELSE([AC_LANG_SOURCE([
  351. int main(int c, char **v) {
  352. #ifdef _WIN32
  353. #if _WIN32
  354. return 0;
  355. #else
  356. return 1;
  357. #endif
  358. #else
  359. return 2;
  360. #endif
  361. }])],
  362. bwin32=true; AC_MSG_RESULT([yes]),
  363. bwin32=false; AC_MSG_RESULT([no]),
  364. bwin32=cross; AC_MSG_RESULT([cross])
  365. )
  366. if test "$bwin32" = "cross"; then
  367. AC_MSG_CHECKING([for win32 (cross)])
  368. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  369. #ifdef _WIN32
  370. int main(int c, char **v) {return 0;}
  371. #else
  372. #error
  373. int main(int c, char **v) {return x(y);}
  374. #endif
  375. ])],
  376. bwin32=true; AC_MSG_RESULT([yes]),
  377. bwin32=false; AC_MSG_RESULT([no]))
  378. fi
  379. AH_BOTTOM([
  380. #ifdef _WIN32
  381. /* Defined to access windows functions and definitions for >=WinXP */
  382. # ifndef WINVER
  383. # define WINVER 0x0501
  384. # endif
  385. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  386. # ifndef _WIN32_WINNT
  387. # define _WIN32_WINNT 0x0501
  388. # endif
  389. /* Defined to avoid including some windows headers as part of Windows.h */
  390. # ifndef WIN32_LEAN_AND_MEAN
  391. # define WIN32_LEAN_AND_MEAN 1
  392. # endif
  393. #endif
  394. ])
  395. AM_CONDITIONAL(WIN32, test "x$bwin32" = "xtrue")
  396. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  397. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  398. dnl Enable C99 when compiling with MIPSpro
  399. AC_MSG_CHECKING([for MIPSpro compiler])
  400. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  401. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  402. #error
  403. return x(y);
  404. #endif
  405. ])],
  406. bmipspro=false; AC_MSG_RESULT(no),
  407. bmipspro=true; AC_MSG_RESULT(yes))
  408. if test "$bmipspro" = "true"; then
  409. CFLAGS="$CFLAGS -c99"
  410. fi
  411. AC_C_BIGENDIAN
  412. AC_ARG_VAR([TOR_RUST_TARGET], [Rust target, must be specified when cross-compiling (HOST != BUILD). example: i686-pc-windows-gnu])
  413. if test "x$enable_rust" = "xyes"; then
  414. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  415. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  416. if test "x$RUSTC" = "xno"; then
  417. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  418. fi
  419. AC_ARG_VAR([CARGO], [path to the cargo binary])
  420. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  421. if test "x$CARGO" = "xno"; then
  422. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  423. fi
  424. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  425. if test "x$enable_fatal_warnings" = "xyes"; then
  426. RUST_WARN=
  427. else
  428. RUST_WARN=#
  429. fi
  430. if test "x$enable_cargo_online_mode" = "xyes"; then
  431. CARGO_ONLINE=
  432. RUST_DL=#
  433. else
  434. CARGO_ONLINE=--frozen
  435. RUST_DL=
  436. dnl When we're not allowed to touch the network, we need crate dependencies
  437. dnl locally available.
  438. AC_MSG_CHECKING([rust crate dependencies])
  439. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  440. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  441. TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
  442. fi
  443. dnl Check whether the path exists before we try to cd into it.
  444. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  445. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  446. ERRORED=1
  447. fi
  448. dnl Make the path absolute, since we'll be using it from within a
  449. dnl subdirectory.
  450. TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
  451. for dep in $rust_crates; do
  452. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  453. 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.])
  454. ERRORED=1
  455. fi
  456. done
  457. if test "x$ERRORED" = "x"; then
  458. AC_MSG_RESULT([yes])
  459. fi
  460. fi
  461. dnl For now both MSVC and MinGW rust libraries will output static libs with
  462. dnl the MSVC naming convention.
  463. if test "$bwin32" = "true"; then
  464. tor_rust_static_name=tor_rust.lib
  465. else
  466. tor_rust_static_name=libtor_rust.a
  467. fi
  468. AC_CANONICAL_BUILD
  469. if test -n "$TOR_RUST_TARGET"; then
  470. if test "$host" = "$build"; then
  471. AC_MSG_ERROR([HOST = BUILD is invalid if TOR_RUST_TARGET is specified, see configure --help for more information.])
  472. fi
  473. RUST_TARGET_PROP="target = '$TOR_RUST_TARGET'"
  474. TOR_RUST_LIB_PATH="src/rust/target/$TOR_RUST_TARGET/release/$tor_rust_static_name"
  475. else
  476. if test "$host" != "$build"; then
  477. AC_MSG_ERROR([TOR_RUST_TARGET must be specified when cross-compiling with Rust enabled.])
  478. fi
  479. RUST_TARGET_PROP=
  480. TOR_RUST_LIB_PATH="src/rust/target/release/$tor_rust_static_name"
  481. fi
  482. AC_SUBST(RUST_TARGET_PROP)
  483. AC_SUBST(TOR_RUST_LIB_PATH)
  484. AC_SUBST(CARGO_ONLINE)
  485. AC_SUBST(RUST_WARN)
  486. AC_SUBST(RUST_DL)
  487. dnl Let's check the rustc version, too
  488. AC_MSG_CHECKING([rust version])
  489. RUSTC_VERSION=`$RUSTC --version`
  490. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  491. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  492. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  493. AC_MSG_ERROR([rustc version couldn't be identified])
  494. fi
  495. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 31; then
  496. AC_MSG_ERROR([rustc must be at least version 1.31.0])
  497. fi
  498. AC_MSG_RESULT([$RUSTC_VERSION])
  499. fi
  500. AC_SEARCH_LIBS(socket, [socket network])
  501. AC_SEARCH_LIBS(gethostbyname, [nsl])
  502. AC_SEARCH_LIBS(dlopen, [dl])
  503. AC_SEARCH_LIBS(inet_aton, [resolv])
  504. AC_SEARCH_LIBS(backtrace, [execinfo])
  505. saved_LIBS="$LIBS"
  506. AC_SEARCH_LIBS([clock_gettime], [rt])
  507. if test "$LIBS" != "$saved_LIBS"; then
  508. # Looks like we need -lrt for clock_gettime().
  509. have_rt=yes
  510. fi
  511. if test "$bwin32" = "false"; then
  512. AC_SEARCH_LIBS(pthread_create, [pthread])
  513. AC_SEARCH_LIBS(pthread_detach, [pthread])
  514. fi
  515. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  516. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  517. AC_CHECK_FUNCS(
  518. _NSGetEnviron \
  519. RtlSecureZeroMemory \
  520. SecureZeroMemory \
  521. accept4 \
  522. backtrace \
  523. backtrace_symbols_fd \
  524. eventfd \
  525. explicit_bzero \
  526. timingsafe_memcmp \
  527. flock \
  528. ftime \
  529. get_current_dir_name \
  530. getaddrinfo \
  531. getdelim \
  532. getifaddrs \
  533. getline \
  534. getpass \
  535. getrlimit \
  536. gettimeofday \
  537. gmtime_r \
  538. gnu_get_libc_version \
  539. htonll \
  540. inet_aton \
  541. ioctl \
  542. issetugid \
  543. llround \
  544. localtime_r \
  545. lround \
  546. madvise \
  547. memmem \
  548. memset_s \
  549. minherit \
  550. mmap \
  551. pipe \
  552. pipe2 \
  553. prctl \
  554. readpassphrase \
  555. rint \
  556. sigaction \
  557. socketpair \
  558. statvfs \
  559. strncasecmp \
  560. strcasecmp \
  561. strlcat \
  562. strlcpy \
  563. strnlen \
  564. strptime \
  565. strtok_r \
  566. strtoull \
  567. sysconf \
  568. sysctl \
  569. truncate \
  570. uname \
  571. usleep \
  572. vasprintf \
  573. _vscprintf
  574. )
  575. # Apple messed up when they added some functions: they
  576. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  577. # checks.
  578. # We should only probe for these functions if we are sure that we
  579. # are not targeting OS X 10.9 or earlier.
  580. AC_MSG_CHECKING([for a pre-Yosemite OS X build target])
  581. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  582. #ifdef __APPLE__
  583. # include <AvailabilityMacros.h>
  584. # ifndef MAC_OS_X_VERSION_10_10
  585. # define MAC_OS_X_VERSION_10_10 101000
  586. # endif
  587. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  588. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
  589. # error "Running on Mac OS X 10.9 or earlier"
  590. # endif
  591. # endif
  592. #endif
  593. ]], [[]])],
  594. [on_macos_pre_10_10=no ; AC_MSG_RESULT([no])],
  595. [on_macos_pre_10_10=yes; AC_MSG_RESULT([yes])])
  596. if test "$on_macos_pre_10_10" = "no"; then
  597. AC_CHECK_FUNCS(
  598. mach_approximate_time \
  599. )
  600. fi
  601. # We should only probe for these functions if we are sure that we
  602. # are not targeting OSX 10.11 or earlier.
  603. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  604. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  605. #ifdef __APPLE__
  606. # include <AvailabilityMacros.h>
  607. # ifndef MAC_OS_X_VERSION_10_12
  608. # define MAC_OS_X_VERSION_10_12 101200
  609. # endif
  610. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  611. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  612. # error "Running on Mac OSX 10.11 or earlier"
  613. # endif
  614. # endif
  615. #endif
  616. ]], [[]])],
  617. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  618. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  619. if test "$on_macos_pre_10_12" = "no"; then
  620. AC_CHECK_FUNCS(
  621. clock_gettime \
  622. getentropy \
  623. )
  624. fi
  625. if test "$bwin32" != "true"; then
  626. AC_CHECK_HEADERS(pthread.h)
  627. AC_CHECK_FUNCS(pthread_create)
  628. AC_CHECK_FUNCS(pthread_condattr_setclock)
  629. fi
  630. if test "$bwin32" = "true"; then
  631. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  632. #include <windows.h>
  633. #include <conio.h>
  634. #include <wchar.h>
  635. ])
  636. fi
  637. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  638. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  639. AC_MSG_CHECKING([whether free(NULL) works])
  640. AC_RUN_IFELSE([AC_LANG_PROGRAM([
  641. #include <stdlib.h>
  642. ], [
  643. char *p = NULL;
  644. free(p);
  645. ])],
  646. [free_null_ok=true; AC_MSG_RESULT(yes)],
  647. [free_null_ok=false; AC_MSG_RESULT(no)],
  648. [free_null_ok=cross; AC_MSG_RESULT(cross)])
  649. if test "$free_null_ok" = "false"; then
  650. AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
  651. fi
  652. dnl ------------------------------------------------------
  653. dnl Where do you live, libevent? And how do we call you?
  654. if test "$bwin32" = "true"; then
  655. TOR_LIB_WS32=-lws2_32
  656. TOR_LIB_IPHLPAPI=-liphlpapi
  657. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  658. # think it's actually necessary.
  659. TOR_LIB_GDI=-lgdi32
  660. TOR_LIB_USERENV=-luserenv
  661. else
  662. TOR_LIB_WS32=
  663. TOR_LIB_GDI=
  664. TOR_LIB_USERENV=
  665. fi
  666. AC_SUBST(TOR_LIB_WS32)
  667. AC_SUBST(TOR_LIB_GDI)
  668. AC_SUBST(TOR_LIB_IPHLPAPI)
  669. AC_SUBST(TOR_LIB_USERENV)
  670. tor_libevent_pkg_redhat="libevent"
  671. tor_libevent_pkg_debian="libevent-dev"
  672. tor_libevent_devpkg_redhat="libevent-devel"
  673. tor_libevent_devpkg_debian="libevent-dev"
  674. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  675. dnl linking for static builds.
  676. STATIC_LIBEVENT_FLAGS=""
  677. if test "$enable_static_libevent" = "yes"; then
  678. if test "$have_rt" = "yes"; then
  679. STATIC_LIBEVENT_FLAGS=" -lrt "
  680. fi
  681. fi
  682. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  683. #ifdef _WIN32
  684. #include <winsock2.h>
  685. #endif
  686. #include <sys/time.h>
  687. #include <sys/types.h>
  688. #include <event2/event.h>], [
  689. #ifdef _WIN32
  690. #include <winsock2.h>
  691. #endif
  692. struct event_base;
  693. struct event_base *event_base_new(void);
  694. void event_base_free(struct event_base *);],
  695. [
  696. #ifdef _WIN32
  697. {WSADATA d; WSAStartup(0x101,&d); }
  698. #endif
  699. event_base_free(event_base_new());
  700. ], [--with-libevent-dir], [/opt/libevent])
  701. dnl Determine the incantation needed to link libevent.
  702. save_LIBS="$LIBS"
  703. save_LDFLAGS="$LDFLAGS"
  704. save_CPPFLAGS="$CPPFLAGS"
  705. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  706. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  707. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  708. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  709. if test "$enable_static_libevent" = "yes"; then
  710. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  711. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  712. else
  713. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  714. fi
  715. else
  716. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  717. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  718. 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"))
  719. if test "$ac_cv_search_event_new" != "none required"; then
  720. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  721. fi
  722. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  723. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  724. fi
  725. else
  726. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  727. fi
  728. fi
  729. dnl Now check for particular libevent functions.
  730. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  731. evutil_secure_rng_add_bytes \
  732. evdns_base_get_nameserver_addr \
  733. ])
  734. LIBS="$save_LIBS"
  735. LDFLAGS="$save_LDFLAGS"
  736. CPPFLAGS="$save_CPPFLAGS"
  737. dnl Check that libevent is at least at version 2.0.10, the first stable
  738. dnl release of its series
  739. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  740. AC_MSG_CHECKING([whether Libevent is new enough])
  741. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  742. #include <event2/event.h>
  743. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  744. #error
  745. int x = y(zz);
  746. #else
  747. int x = 1;
  748. #endif
  749. ])], [ AC_MSG_RESULT([yes]) ],
  750. [ AC_MSG_RESULT([no])
  751. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  752. LIBS="$save_LIBS"
  753. LDFLAGS="$save_LDFLAGS"
  754. CPPFLAGS="$save_CPPFLAGS"
  755. AC_SUBST(TOR_LIBEVENT_LIBS)
  756. dnl ------------------------------------------------------
  757. dnl Where do you live, libm?
  758. dnl On some platforms (Haiku/BeOS) the math library is
  759. dnl part of libroot. In which case don't link against lm
  760. TOR_LIB_MATH=""
  761. save_LIBS="$LIBS"
  762. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  763. if test "$ac_cv_search_pow" != "none required"; then
  764. TOR_LIB_MATH="$ac_cv_search_pow"
  765. fi
  766. LIBS="$save_LIBS"
  767. AC_SUBST(TOR_LIB_MATH)
  768. dnl ------------------------------------------------------
  769. dnl Hello, NSS. You're new around here.
  770. if test "x$enable_nss" = "xyes"; then
  771. PKG_CHECK_MODULES(NSS,
  772. [nss],
  773. [have_nss=yes],
  774. [have_nss=no; AC_MSG_ERROR([You asked for NSS but I can't find it, $pkg_config_user_action, or set NSS_CFLAGS and NSS_LIBS.])])
  775. AC_SUBST(NSS_CFLAGS)
  776. AC_SUBST(NSS_LIBS)
  777. fi
  778. dnl ------------------------------------------------------
  779. dnl Where do you live, openssl? And how do we call you?
  780. if test "x$enable_nss" != "xyes"; then
  781. tor_openssl_pkg_redhat="openssl"
  782. tor_openssl_pkg_debian="libssl-dev"
  783. tor_openssl_devpkg_redhat="openssl-devel"
  784. tor_openssl_devpkg_debian="libssl-dev"
  785. ALT_openssl_WITHVAL=""
  786. AC_ARG_WITH(ssl-dir,
  787. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  788. [
  789. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  790. ALT_openssl_WITHVAL="$withval"
  791. fi
  792. ])
  793. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  794. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  795. [#include <openssl/ssl.h>
  796. char *getenv(const char *);],
  797. [struct ssl_cipher_st;
  798. unsigned SSL_CIPHER_get_id(const struct ssl_cipher_st *);
  799. char *getenv(const char *);],
  800. dnl This funny-looking test program calls getenv, so that the compiler
  801. dnl will neither make code that call SSL_CIPHER_get_id(NULL) [producing
  802. dnl a crash], nor optimize out the call to SSL_CIPHER_get_id().
  803. dnl We look for SSL_cipher_get_id() because it is present in
  804. dnl OpenSSL >=1.0.1, because it is not deprecated, and because Tor
  805. dnl depends on it.
  806. [if (getenv("THIS_SHOULDNT_BE_SET_X201803")) SSL_CIPHER_get_id((void *)0);], [],
  807. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  808. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  809. if test "$enable_static_openssl" = "yes"; then
  810. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  811. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  812. else
  813. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  814. fi
  815. else
  816. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  817. fi
  818. AC_SUBST(TOR_OPENSSL_LIBS)
  819. dnl Now check for particular openssl functions.
  820. save_LIBS="$LIBS"
  821. save_LDFLAGS="$LDFLAGS"
  822. save_CPPFLAGS="$CPPFLAGS"
  823. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  824. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  825. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  826. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  827. #include <openssl/opensslv.h>
  828. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  829. #error "too old"
  830. #endif
  831. ]], [[]])],
  832. [ : ],
  833. [ 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.]) ])
  834. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  835. #include <openssl/opensslv.h>
  836. #include <openssl/evp.h>
  837. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  838. #error "no ECC"
  839. #endif
  840. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  841. #error "curves unavailable"
  842. #endif
  843. ]], [[]])],
  844. [ : ],
  845. [ 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.]) ])
  846. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  847. [#include <openssl/ssl.h>
  848. ])
  849. dnl OpenSSL functions which we might not have. In theory, we could just
  850. dnl check the openssl version number, but in practice that gets pretty
  851. dnl confusing with LibreSSL, OpenSSL, and various distributions' patches
  852. dnl to them.
  853. AC_CHECK_FUNCS([ \
  854. ERR_load_KDF_strings \
  855. EVP_PBE_scrypt \
  856. EVP_sha3_256 \
  857. SSL_CIPHER_find \
  858. SSL_CTX_set1_groups_list \
  859. SSL_CTX_set_security_level \
  860. SSL_SESSION_get_master_key \
  861. SSL_get_client_ciphers \
  862. SSL_get_client_random \
  863. SSL_get_server_random \
  864. TLS_method \
  865. ])
  866. dnl Check if OpenSSL structures are opaque
  867. AC_CHECK_MEMBERS([SSL.state], , ,
  868. [#include <openssl/ssl.h>
  869. ])
  870. AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
  871. #include <openssl/sha.h>
  872. ])
  873. fi # enable_nss
  874. dnl We will someday make KECCAK_TINY optional, but for now we still need
  875. dnl it for SHAKE, since OpenSSL's SHAKE can't be squeezed more than
  876. dnl once. See comment in the definition of crypto_xof_t.
  877. dnl AM_CONDITIONAL(BUILD_KECCAK_TINY,
  878. dnl test "x$ac_cv_func_EVP_sha3_256" != "xyes")
  879. AM_CONDITIONAL(BUILD_KECCAK_TINY, true)
  880. dnl ======================================================================
  881. dnl Can we use KIST?
  882. dnl Define the set of checks for KIST scheduler support.
  883. AC_DEFUN([CHECK_KIST_SUPPORT],[
  884. dnl KIST needs struct tcp_info and for certain members to exist.
  885. AC_CHECK_MEMBERS(
  886. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  887. , ,[[#include <netinet/tcp.h>]])
  888. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  889. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  890. #include <linux/sockios.h>
  891. #ifndef SIOCOUTQNSD
  892. #error
  893. #endif
  894. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  895. if test "x$have_siocoutqnsd" = "xyes"; then
  896. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  897. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  898. have_kist_support=yes
  899. fi
  900. fi
  901. fi
  902. ])
  903. dnl Now, trigger the check.
  904. CHECK_KIST_SUPPORT
  905. AS_IF([test "x$have_kist_support" = "xyes"],
  906. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  907. on this system])],
  908. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  909. LIBS="$save_LIBS"
  910. LDFLAGS="$save_LDFLAGS"
  911. CPPFLAGS="$save_CPPFLAGS"
  912. dnl ------------------------------------------------------
  913. dnl Where do you live, zlib? And how do we call you?
  914. tor_zlib_pkg_redhat="zlib"
  915. tor_zlib_pkg_debian="zlib1g"
  916. tor_zlib_devpkg_redhat="zlib-devel"
  917. tor_zlib_devpkg_debian="zlib1g-dev"
  918. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  919. [#include <zlib.h>],
  920. [const char * zlibVersion(void);],
  921. [zlibVersion();], [--with-zlib-dir],
  922. [/opt/zlib])
  923. if test "$enable_static_zlib" = "yes"; then
  924. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  925. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  926. using --enable-static-zlib")
  927. else
  928. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  929. fi
  930. else
  931. TOR_ZLIB_LIBS="-lz"
  932. fi
  933. AC_SUBST(TOR_ZLIB_LIBS)
  934. dnl ------------------------------------------------------
  935. dnl Where we do we find lzma?
  936. AC_ARG_ENABLE(lzma,
  937. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  938. [case "${enableval}" in
  939. "yes") lzma=true ;;
  940. "no") lzma=false ;;
  941. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  942. esac], [lzma=auto])
  943. if test "x$enable_lzma" = "xno"; then
  944. have_lzma=no;
  945. else
  946. PKG_CHECK_MODULES([LZMA],
  947. [liblzma],
  948. have_lzma=yes,
  949. have_lzma=no)
  950. if test "x$have_lzma" = "xno" ; then
  951. AC_MSG_WARN([Unable to find liblzma, $pkg_config_user_action, or set LZMA_CFLAGS and LZMA_LIBS.])
  952. fi
  953. fi
  954. if test "x$have_lzma" = "xyes"; then
  955. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  956. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  957. TOR_LZMA_LIBS="${LZMA_LIBS}"
  958. fi
  959. AC_SUBST(TOR_LZMA_CFLAGS)
  960. AC_SUBST(TOR_LZMA_LIBS)
  961. dnl ------------------------------------------------------
  962. dnl Where we do we find zstd?
  963. AC_ARG_ENABLE(zstd,
  964. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  965. [case "${enableval}" in
  966. "yes") zstd=true ;;
  967. "no") zstd=false ;;
  968. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  969. esac], [zstd=auto])
  970. if test "x$enable_zstd" = "xno"; then
  971. have_zstd=no;
  972. else
  973. PKG_CHECK_MODULES([ZSTD],
  974. [libzstd >= 1.1],
  975. have_zstd=yes,
  976. have_zstd=no)
  977. if test "x$have_zstd" = "xno" ; then
  978. AC_MSG_WARN([Unable to find libzstd, $pkg_config_user_action, or set ZSTD_CFLAGS and ZSTD_LIBS.])
  979. fi
  980. fi
  981. if test "x$have_zstd" = "xyes"; then
  982. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  983. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  984. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  985. dnl now check for zstd functions
  986. save_LIBS="$LIBS"
  987. save_CFLAGS="$CFLAGS"
  988. LIBS="$LIBS $ZSTD_LIBS"
  989. CFLAGS="$CFLAGS $ZSTD_CFLAGS"
  990. AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
  991. ZSTD_estimateDCtxSize)
  992. LIBS="$save_LIBS"
  993. CFLAGS="$save_CFLAGS"
  994. fi
  995. AC_SUBST(TOR_ZSTD_CFLAGS)
  996. AC_SUBST(TOR_ZSTD_LIBS)
  997. dnl ----------------------------------------------------------------------
  998. dnl Check if libcap is available for capabilities.
  999. tor_cap_pkg_debian="libcap2"
  1000. tor_cap_pkg_redhat="libcap"
  1001. tor_cap_devpkg_debian="libcap-dev"
  1002. tor_cap_devpkg_redhat="libcap-devel"
  1003. AC_CHECK_LIB([cap], [cap_init], [],
  1004. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  1005. )
  1006. AC_CHECK_FUNCS(cap_set_proc)
  1007. dnl ---------------------------------------------------------------------
  1008. dnl Now that we know about our major libraries, we can check for compiler
  1009. dnl and linker hardening options. We need to do this with the libraries known,
  1010. dnl since sometimes the linker will like an option but not be willing to
  1011. dnl use it with a build of a library.
  1012. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  1013. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  1014. CFLAGS_FTRAPV=
  1015. CFLAGS_FWRAPV=
  1016. CFLAGS_ASAN=
  1017. CFLAGS_UBSAN=
  1018. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1019. #if !defined(__clang__)
  1020. #error
  1021. #endif])], have_clang=yes, have_clang=no)
  1022. if test "x$enable_pic" = "xyes"; then
  1023. TOR_CHECK_CFLAGS(-fPIC)
  1024. fi
  1025. if test "x$enable_gcc_hardening" != "xno"; then
  1026. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  1027. if test "x$have_clang" = "xyes"; then
  1028. TOR_CHECK_CFLAGS(-Qunused-arguments)
  1029. fi
  1030. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  1031. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  1032. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  1033. m4_ifdef([AS_VAR_IF],[
  1034. AS_VAR_IF(can_compile, [yes],
  1035. AS_VAR_IF(can_link, [yes],
  1036. [],
  1037. AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
  1038. )])
  1039. AS_VAR_POPDEF([can_link])
  1040. AS_VAR_POPDEF([can_compile])
  1041. TOR_CHECK_CFLAGS(-Wstack-protector)
  1042. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  1043. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  1044. if test "$enable_pic" != "yes"; then
  1045. # If we have already enabled -fPIC, then we don't also need to
  1046. # compile with -fPIE...
  1047. TOR_CHECK_CFLAGS(-fPIE)
  1048. fi
  1049. # ... but we want to link our executables with -pie in any case, since
  1050. # they're executables, not a library.
  1051. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  1052. fi
  1053. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  1054. AC_MSG_CHECKING([whether we can run hardened binaries])
  1055. AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0;])],
  1056. [AC_MSG_RESULT([yes])],
  1057. [AC_MSG_RESULT([no])
  1058. AC_MSG_ERROR([dnl
  1059. We can link with compiler hardening options, but we can't run with them.
  1060. That's a bad sign! If you must, you can pass --disable-gcc-hardening to
  1061. configure, but it would be better to figure out what the underlying problem
  1062. is.])],
  1063. [AC_MSG_RESULT([cross])])
  1064. fi
  1065. if test "$fragile_hardening" = "yes"; then
  1066. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  1067. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  1068. 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.])
  1069. fi
  1070. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  1071. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  1072. fi
  1073. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  1074. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1075. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  1076. fi
  1077. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  1078. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1079. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  1080. fi
  1081. TOR_TRY_COMPILE_WITH_CFLAGS([-fno-sanitize=float-divide-by-zero], also_link, CFLAGS_UBSAN="-fno-sanitize=float-divide-by-zero", true)
  1082. if test "$tor_cv_cflags__fno_sanitize_float_divide_by_zero" = "yes" && test "$tor_can_link__fno_sanitize_float_divide_by_zero" != "yes"; then
  1083. AC_MSG_ERROR([The compiler supports -fno-sanitize=float-divide-by-zero, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  1084. fi
  1085. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  1086. fi
  1087. dnl Find the correct libraries to add in order to use the sanitizers.
  1088. dnl
  1089. dnl When building Rust, Cargo will run the linker with the -nodefaultlibs
  1090. dnl option, which will prevent the compiler from linking the sanitizer
  1091. dnl libraries it needs. We need to specify them manually.
  1092. dnl
  1093. dnl What's more, we need to specify them in a linker script rather than
  1094. dnl from build.rs: these options aren't allowed in the cargo:rustc-flags
  1095. dnl variable.
  1096. RUST_LINKER_OPTIONS=""
  1097. if test "x$have_clang" = "xyes"; then
  1098. if test "x$CFLAGS_ASAN" != "x"; then
  1099. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_ASAN -Cdefault-linker-libraries"
  1100. fi
  1101. if test "x$CFLAGS_UBSAN" != "x"; then
  1102. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=$CFLAGS_UBSAN -Cdefault-linker-libraries"
  1103. fi
  1104. else
  1105. if test "x$CFLAGS_ASAN" != "x"; then
  1106. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=address -Cdefault-linker-libraries"
  1107. fi
  1108. if test "x$CFLAGS_UBSAN" != "x"; then
  1109. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -Clink-arg=-fsanitize=undefined -Cdefault-linker-libraries"
  1110. fi
  1111. fi
  1112. AC_SUBST(RUST_LINKER_OPTIONS)
  1113. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  1114. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  1115. mulodi_fixes_ftrapv=no
  1116. if test "$have_clang" = "yes"; then
  1117. saved_CFLAGS="$CFLAGS"
  1118. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  1119. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  1120. AC_LINK_IFELSE([
  1121. AC_LANG_SOURCE([[
  1122. #include <stdint.h>
  1123. #include <stdlib.h>
  1124. int main(int argc, char **argv)
  1125. {
  1126. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1127. * (int64_t)atoi(argv[3]);
  1128. return x == 9;
  1129. } ]])],
  1130. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  1131. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  1132. if test "$ftrapv_can_link" = "no"; then
  1133. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  1134. AC_LINK_IFELSE([
  1135. AC_LANG_SOURCE([[
  1136. #include <stdint.h>
  1137. #include <stdlib.h>
  1138. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  1139. *overflow=0;
  1140. return a;
  1141. }
  1142. int main(int argc, char **argv)
  1143. {
  1144. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1145. * (int64_t)atoi(argv[3]);
  1146. return x == 9;
  1147. } ]])],
  1148. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  1149. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  1150. fi
  1151. CFLAGS="$saved_CFLAGS"
  1152. fi
  1153. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  1154. dnl These cflags add bunches of branches, and we haven't been able to
  1155. dnl persuade ourselves that they're suitable for code that needs to be
  1156. dnl constant time.
  1157. AC_SUBST(CFLAGS_BUGTRAP)
  1158. dnl These cflags are variant ones sutable for code that needs to be
  1159. dnl constant-time.
  1160. AC_SUBST(CFLAGS_CONSTTIME)
  1161. if test "x$enable_linker_hardening" != "xno"; then
  1162. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  1163. fi
  1164. # For backtrace support
  1165. TOR_CHECK_LDFLAGS(-rdynamic)
  1166. dnl ------------------------------------------------------
  1167. dnl Now see if we have a -fomit-frame-pointer compiler option.
  1168. saved_CFLAGS="$CFLAGS"
  1169. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  1170. F_OMIT_FRAME_POINTER=''
  1171. if test "$saved_CFLAGS" != "$CFLAGS"; then
  1172. if test "$fragile_hardening" = "yes"; then
  1173. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  1174. fi
  1175. fi
  1176. CFLAGS="$saved_CFLAGS"
  1177. AC_SUBST(F_OMIT_FRAME_POINTER)
  1178. dnl ------------------------------------------------------
  1179. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  1180. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  1181. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  1182. dnl code will work.
  1183. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  1184. dnl ============================================================
  1185. dnl Check for libseccomp
  1186. if test "x$enable_seccomp" != "xno"; then
  1187. AC_CHECK_HEADERS([seccomp.h])
  1188. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  1189. fi
  1190. dnl ============================================================
  1191. dnl Check for libscrypt
  1192. if test "x$enable_libscrypt" != "xno"; then
  1193. AC_CHECK_HEADERS([libscrypt.h])
  1194. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  1195. AC_CHECK_FUNCS([libscrypt_scrypt])
  1196. fi
  1197. dnl ============================================================
  1198. dnl We need an implementation of curve25519.
  1199. dnl set these defaults.
  1200. build_curve25519_donna=no
  1201. build_curve25519_donna_c64=no
  1202. use_curve25519_donna=no
  1203. use_curve25519_nacl=no
  1204. CURVE25519_LIBS=
  1205. dnl The best choice is using curve25519-donna-c64, but that requires
  1206. dnl that we
  1207. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  1208. tor_cv_can_use_curve25519_donna_c64,
  1209. [AC_RUN_IFELSE(
  1210. [AC_LANG_PROGRAM([dnl
  1211. #include <stdint.h>
  1212. typedef unsigned uint128_t __attribute__((mode(TI)));
  1213. int func(uint64_t a, uint64_t b) {
  1214. uint128_t c = ((uint128_t)a) * b;
  1215. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1216. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1217. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1218. (((uint64_t)(c))&0xffffffffL) == 0;
  1219. return ok;
  1220. }
  1221. ], [dnl
  1222. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1223. ((uint64_t)1234567890) << 24);
  1224. return !ok;
  1225. ])],
  1226. [tor_cv_can_use_curve25519_donna_c64=yes],
  1227. [tor_cv_can_use_curve25519_donna_c64=no],
  1228. [AC_LINK_IFELSE(
  1229. [AC_LANG_PROGRAM([dnl
  1230. #include <stdint.h>
  1231. typedef unsigned uint128_t __attribute__((mode(TI)));
  1232. int func(uint64_t a, uint64_t b) {
  1233. uint128_t c = ((uint128_t)a) * b;
  1234. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1235. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1236. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1237. (((uint64_t)(c))&0xffffffffL) == 0;
  1238. return ok;
  1239. }
  1240. ], [dnl
  1241. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1242. ((uint64_t)1234567890) << 24);
  1243. return !ok;
  1244. ])],
  1245. [tor_cv_can_use_curve25519_donna_c64=cross],
  1246. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1247. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1248. nacl/crypto_scalarmult_curve25519.h])
  1249. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1250. tor_cv_can_use_curve25519_nacl,
  1251. [tor_saved_LIBS="$LIBS"
  1252. LIBS="$LIBS -lnacl"
  1253. AC_LINK_IFELSE(
  1254. [AC_LANG_PROGRAM([dnl
  1255. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1256. #include <crypto_scalarmult_curve25519.h>
  1257. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1258. #include <nacl/crypto_scalarmult_curve25519.h>
  1259. #endif
  1260. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1261. #error Hey, this is the reference implementation! That's not fast.
  1262. #endif
  1263. ], [
  1264. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1265. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1266. [tor_cv_can_use_curve25519_nacl=no])
  1267. LIBS="$tor_saved_LIBS" ])
  1268. dnl Okay, now we need to figure out which one to actually use. Fall back
  1269. dnl to curve25519-donna.c
  1270. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1271. build_curve25519_donna_c64=yes
  1272. use_curve25519_donna=yes
  1273. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1274. use_curve25519_nacl=yes
  1275. CURVE25519_LIBS=-lnacl
  1276. else
  1277. build_curve25519_donna=yes
  1278. use_curve25519_donna=yes
  1279. fi
  1280. if test "x$use_curve25519_donna" = "xyes"; then
  1281. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1282. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1283. fi
  1284. if test "x$use_curve25519_nacl" = "xyes"; then
  1285. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1286. [Defined if we should use a curve25519 from nacl])
  1287. fi
  1288. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1289. test "x$build_curve25519_donna" = "xyes")
  1290. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1291. test "x$build_curve25519_donna_c64" = "xyes")
  1292. AC_SUBST(CURVE25519_LIBS)
  1293. dnl Make sure to enable support for large off_t if available.
  1294. AC_SYS_LARGEFILE
  1295. AC_CHECK_HEADERS([errno.h \
  1296. fcntl.h \
  1297. signal.h \
  1298. string.h \
  1299. sys/capability.h \
  1300. sys/fcntl.h \
  1301. sys/stat.h \
  1302. sys/time.h \
  1303. sys/types.h \
  1304. time.h \
  1305. unistd.h \
  1306. arpa/inet.h \
  1307. crt_externs.h \
  1308. execinfo.h \
  1309. gnu/libc-version.h \
  1310. grp.h \
  1311. ifaddrs.h \
  1312. inttypes.h \
  1313. limits.h \
  1314. linux/types.h \
  1315. mach/vm_inherit.h \
  1316. machine/limits.h \
  1317. malloc.h \
  1318. malloc/malloc.h \
  1319. malloc_np.h \
  1320. netdb.h \
  1321. netinet/in.h \
  1322. netinet/in6.h \
  1323. pwd.h \
  1324. readpassphrase.h \
  1325. stdatomic.h \
  1326. sys/eventfd.h \
  1327. sys/file.h \
  1328. sys/ioctl.h \
  1329. sys/limits.h \
  1330. sys/mman.h \
  1331. sys/param.h \
  1332. sys/prctl.h \
  1333. sys/random.h \
  1334. sys/resource.h \
  1335. sys/select.h \
  1336. sys/socket.h \
  1337. sys/statvfs.h \
  1338. sys/syscall.h \
  1339. sys/sysctl.h \
  1340. sys/syslimits.h \
  1341. sys/time.h \
  1342. sys/types.h \
  1343. sys/un.h \
  1344. sys/utime.h \
  1345. sys/wait.h \
  1346. syslog.h \
  1347. utime.h])
  1348. AC_CHECK_HEADERS(sys/param.h)
  1349. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1350. [#ifdef HAVE_SYS_TYPES_H
  1351. #include <sys/types.h>
  1352. #endif
  1353. #ifdef HAVE_SYS_SOCKET_H
  1354. #include <sys/socket.h>
  1355. #endif])
  1356. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1357. [#ifdef HAVE_SYS_TYPES_H
  1358. #include <sys/types.h>
  1359. #endif
  1360. #ifdef HAVE_SYS_SOCKET_H
  1361. #include <sys/socket.h>
  1362. #endif
  1363. #ifdef HAVE_NET_IF_H
  1364. #include <net/if.h>
  1365. #endif
  1366. #ifdef HAVE_NETINET_IN_H
  1367. #include <netinet/in.h>
  1368. #endif])
  1369. AC_CHECK_HEADERS(linux/if.h,[],[],
  1370. [
  1371. #ifdef HAVE_SYS_SOCKET_H
  1372. #include <sys/socket.h>
  1373. #endif
  1374. ])
  1375. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1376. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1377. [#ifdef HAVE_SYS_TYPES_H
  1378. #include <sys/types.h>
  1379. #endif
  1380. #ifdef HAVE_SYS_SOCKET_H
  1381. #include <sys/socket.h>
  1382. #endif
  1383. #ifdef HAVE_LIMITS_H
  1384. #include <limits.h>
  1385. #endif
  1386. #ifdef HAVE_LINUX_TYPES_H
  1387. #include <linux/types.h>
  1388. #endif
  1389. #ifdef HAVE_NETINET_IN6_H
  1390. #include <netinet/in6.h>
  1391. #endif
  1392. #ifdef HAVE_NETINET_IN_H
  1393. #include <netinet/in.h>
  1394. #endif])
  1395. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1396. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1397. [#ifdef HAVE_SYS_TYPES_H
  1398. #include <sys/types.h>
  1399. #endif
  1400. #ifdef HAVE_SYS_SOCKET_H
  1401. #include <sys/socket.h>
  1402. #endif
  1403. #ifdef HAVE_LIMITS_H
  1404. #include <limits.h>
  1405. #endif
  1406. #ifdef HAVE_LINUX_TYPES_H
  1407. #include <linux/types.h>
  1408. #endif
  1409. #ifdef HAVE_NETINET_IN6_H
  1410. #include <netinet/in6.h>
  1411. #endif
  1412. #ifdef HAVE_NETINET_IN_H
  1413. #include <netinet/in.h>
  1414. #endif
  1415. #ifdef HAVE_LINUX_IF_H
  1416. #include <linux/if.h>
  1417. #endif])
  1418. transparent_ok=0
  1419. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1420. transparent_ok=1
  1421. fi
  1422. if test "x$linux_netfilter_ipv4" = "x1"; then
  1423. transparent_ok=1
  1424. fi
  1425. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1426. transparent_ok=1
  1427. fi
  1428. if test "x$transparent_ok" = "x1"; then
  1429. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1430. else
  1431. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1432. fi
  1433. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1434. [#ifdef HAVE_SYS_TYPES_H
  1435. #include <sys/types.h>
  1436. #endif
  1437. #ifdef HAVE_SYS_TIME_H
  1438. #include <sys/time.h>
  1439. #endif])
  1440. AC_CHECK_SIZEOF(char)
  1441. AC_CHECK_SIZEOF(short)
  1442. AC_CHECK_SIZEOF(int)
  1443. AC_CHECK_SIZEOF(unsigned int)
  1444. AC_CHECK_SIZEOF(long)
  1445. AC_CHECK_SIZEOF(long long)
  1446. AC_CHECK_SIZEOF(__int64)
  1447. AC_CHECK_SIZEOF(void *)
  1448. AC_CHECK_SIZEOF(time_t)
  1449. AC_CHECK_SIZEOF(size_t)
  1450. AC_CHECK_SIZEOF(pid_t)
  1451. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1452. AC_PC_FROM_UCONTEXT([:])
  1453. dnl used to include sockaddr_storage, but everybody has that.
  1454. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1455. [#ifdef HAVE_SYS_TYPES_H
  1456. #include <sys/types.h>
  1457. #endif
  1458. #ifdef HAVE_NETINET_IN_H
  1459. #include <netinet/in.h>
  1460. #endif
  1461. #ifdef HAVE_NETINET_IN6_H
  1462. #include <netinet/in6.h>
  1463. #endif
  1464. #ifdef HAVE_SYS_SOCKET_H
  1465. #include <sys/socket.h>
  1466. #endif
  1467. #ifdef _WIN32
  1468. #define _WIN32_WINNT 0x0501
  1469. #define WIN32_LEAN_AND_MEAN
  1470. #include <winsock2.h>
  1471. #include <ws2tcpip.h>
  1472. #endif
  1473. ])
  1474. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1475. [#ifdef HAVE_SYS_TYPES_H
  1476. #include <sys/types.h>
  1477. #endif
  1478. #ifdef HAVE_NETINET_IN_H
  1479. #include <netinet/in.h>
  1480. #endif
  1481. #ifdef HAVE_NETINET_IN6_H
  1482. #include <netinet/in6.h>
  1483. #endif
  1484. #ifdef HAVE_SYS_SOCKET_H
  1485. #include <sys/socket.h>
  1486. #endif
  1487. #ifdef _WIN32
  1488. #define _WIN32_WINNT 0x0501
  1489. #define WIN32_LEAN_AND_MEAN
  1490. #include <winsock2.h>
  1491. #include <ws2tcpip.h>
  1492. #endif
  1493. ])
  1494. AC_CHECK_TYPES([rlim_t], , ,
  1495. [#ifdef HAVE_SYS_TYPES_H
  1496. #include <sys/types.h>
  1497. #endif
  1498. #ifdef HAVE_SYS_TIME_H
  1499. #include <sys/time.h>
  1500. #endif
  1501. #ifdef HAVE_SYS_RESOURCE_H
  1502. #include <sys/resource.h>
  1503. #endif
  1504. ])
  1505. AX_CHECK_SIGN([time_t],
  1506. [ : ],
  1507. [ : ], [
  1508. #ifdef HAVE_SYS_TYPES_H
  1509. #include <sys/types.h>
  1510. #endif
  1511. #ifdef HAVE_SYS_TIME_H
  1512. #include <sys/time.h>
  1513. #endif
  1514. #ifdef HAVE_TIME_H
  1515. #include <time.h>
  1516. #endif
  1517. ])
  1518. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1519. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1520. fi
  1521. AX_CHECK_SIGN([size_t],
  1522. [ tor_cv_size_t_signed=yes ],
  1523. [ tor_cv_size_t_signed=no ], [
  1524. #ifdef HAVE_SYS_TYPES_H
  1525. #include <sys/types.h>
  1526. #endif
  1527. ])
  1528. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1529. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1530. fi
  1531. AX_CHECK_SIGN([enum always],
  1532. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1533. [ : ], [
  1534. enum always { AAA, BBB, CCC };
  1535. ])
  1536. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1537. #ifdef HAVE_SYS_SOCKET_H
  1538. #include <sys/socket.h>
  1539. #endif
  1540. ])
  1541. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1542. AC_CHECK_SIZEOF(cell_t)
  1543. # Let's see if stdatomic works. (There are some debian clangs that screw it
  1544. # up; see Tor bug #26779 and debian bug 903709.)
  1545. AC_CACHE_CHECK([whether C11 stdatomic.h actually works],
  1546. tor_cv_stdatomic_works,
  1547. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1548. #include <stdatomic.h>
  1549. struct x { atomic_size_t y; };
  1550. void try_atomic_init(struct x *xx)
  1551. {
  1552. atomic_init(&xx->y, 99);
  1553. atomic_fetch_add(&xx->y, 1);
  1554. }
  1555. ]])], [tor_cv_stdatomic_works=yes], [tor_cv_stdatomic_works=no])])
  1556. if test "$tor_cv_stdatomic_works" = "yes"; then
  1557. AC_DEFINE(STDATOMIC_WORKS, 1, [Set to 1 if we can compile a simple stdatomic example.])
  1558. elif test "$ac_cv_header_stdatomic_h" = "yes"; then
  1559. 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 ])
  1560. fi
  1561. # Now make sure that NULL can be represented as zero bytes.
  1562. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1563. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1564. [[#include <stdlib.h>
  1565. #include <string.h>
  1566. #include <stdio.h>
  1567. #ifdef HAVE_STDDEF_H
  1568. #include <stddef.h>
  1569. #endif
  1570. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1571. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1572. [tor_cv_null_is_zero=yes],
  1573. [tor_cv_null_is_zero=no],
  1574. [tor_cv_null_is_zero=cross])])
  1575. if test "$tor_cv_null_is_zero" = "cross"; then
  1576. # Cross-compiling; let's hope that the target isn't raving mad.
  1577. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1578. fi
  1579. if test "$tor_cv_null_is_zero" != "no"; then
  1580. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1581. [Define to 1 iff memset(0) sets pointers to NULL])
  1582. fi
  1583. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1584. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1585. [[#include <stdlib.h>
  1586. #include <string.h>
  1587. #include <stdio.h>
  1588. #ifdef HAVE_STDDEF_H
  1589. #include <stddef.h>
  1590. #endif
  1591. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1592. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1593. [tor_cv_dbl0_is_zero=yes],
  1594. [tor_cv_dbl0_is_zero=no],
  1595. [tor_cv_dbl0_is_zero=cross])])
  1596. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1597. # Cross-compiling; let's hope that the target isn't raving mad.
  1598. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1599. fi
  1600. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1601. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1602. [Define to 1 iff memset(0) sets doubles to 0.0])
  1603. fi
  1604. # And what happens when we malloc zero?
  1605. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1606. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1607. [[#include <stdlib.h>
  1608. #include <string.h>
  1609. #include <stdio.h>
  1610. #ifdef HAVE_STDDEF_H
  1611. #include <stddef.h>
  1612. #endif
  1613. int main () { return malloc(0)?0:1; }]])],
  1614. [tor_cv_malloc_zero_works=yes],
  1615. [tor_cv_malloc_zero_works=no],
  1616. [tor_cv_malloc_zero_works=cross])])
  1617. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1618. # Cross-compiling; let's hope that the target isn't raving mad.
  1619. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1620. fi
  1621. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1622. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1623. [Define to 1 iff malloc(0) returns a pointer])
  1624. fi
  1625. # whether we seem to be in a 2s-complement world.
  1626. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1627. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1628. [[int main () { int problem = ((-99) != (~99)+1);
  1629. return problem ? 1 : 0; }]])],
  1630. [tor_cv_twos_complement=yes],
  1631. [tor_cv_twos_complement=no],
  1632. [tor_cv_twos_complement=cross])])
  1633. if test "$tor_cv_twos_complement" = "cross"; then
  1634. # Cross-compiling; let's hope that the target isn't raving mad.
  1635. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1636. fi
  1637. if test "$tor_cv_twos_complement" != "no"; then
  1638. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1639. [Define to 1 iff we represent negative integers with
  1640. two's complement])
  1641. fi
  1642. # What does shifting a negative value do?
  1643. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1644. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1645. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1646. [tor_cv_sign_extend=yes],
  1647. [tor_cv_sign_extend=no],
  1648. [tor_cv_sign_extend=cross])])
  1649. if test "$tor_cv_sign_extend" = "cross"; then
  1650. # Cross-compiling; let's hope that the target isn't raving mad.
  1651. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1652. fi
  1653. if test "$tor_cv_sign_extend" != "no"; then
  1654. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1655. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1656. fi
  1657. # Is uint8_t the same type as unsigned char?
  1658. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1659. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1660. #include <stdint.h>
  1661. extern uint8_t c;
  1662. unsigned char c;]])],
  1663. [tor_cv_uint8_uchar=yes],
  1664. [tor_cv_uint8_uchar=no],
  1665. [tor_cv_uint8_uchar=cross])])
  1666. if test "$tor_cv_uint8_uchar" = "cross"; then
  1667. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1668. fi
  1669. if test "$tor_cv_uint8_uchar" = "no"; then
  1670. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1671. fi
  1672. AC_ARG_WITH(tcmalloc,
  1673. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library. Deprecated; see --with-malloc]))
  1674. default_malloc=system
  1675. if test "x$enable_openbsd_malloc" = "xyes" ; then
  1676. AC_MSG_NOTICE([The --enable-openbsd-malloc argument is deprecated; use --with-malloc=openbsd instead.])
  1677. default_malloc=openbsd
  1678. fi
  1679. if test "x$with_tcmalloc" = "xyes"; then
  1680. AC_MSG_NOTICE([The --with-tcmalloc argument is deprecated; use --with-malloc=tcmalloc instead.])
  1681. default_malloc=tcmalloc
  1682. fi
  1683. AC_ARG_WITH(malloc,
  1684. AS_HELP_STRING([--with-malloc=[system,jemalloc,tcmalloc,openbsd]],
  1685. [select special malloc implementation [system]]),
  1686. [ malloc="$with_malloc" ], [ malloc="$default_malloc" ])
  1687. AS_CASE([$malloc],
  1688. [tcmalloc], [
  1689. PKG_CHECK_MODULES([TCMALLOC],
  1690. [libtcmalloc],
  1691. have_tcmalloc=yes,
  1692. have_tcmalloc=no)
  1693. if test "x$have_tcmalloc" = "xno" ; then
  1694. AC_MSG_ERROR([Unable to find tcmalloc requested by --with-malloc, $pkg_config_user_action, or set TCMALLOC_CFLAGS and TCMALLOC_LIBS.])
  1695. fi
  1696. CFLAGS="$CFLAGS $TCMALLOC_CFLAGS"
  1697. LIBS="$TCMALLOC_LIBS $LIBS"
  1698. ],
  1699. [jemalloc], [
  1700. PKG_CHECK_MODULES([JEMALLOC],
  1701. [jemalloc],
  1702. have_jemalloc=yes,
  1703. have_jemalloc=no)
  1704. if test "x$have_jemalloc" = "xno" ; then
  1705. AC_MSG_ERROR([Unable to find jemalloc requested by --with-malloc, $pkg_config_user_action, or set JEMALLOC_CFLAGS and JEMALLOC_LIBS.])
  1706. fi
  1707. CFLAGS="$CFLAGS $JEMALLOC_CFLAGS"
  1708. LIBS="$JEMALLOC_LIBS $LIBS"
  1709. using_custom_malloc=yes
  1710. ],
  1711. [openbsd], [
  1712. AC_MSG_WARN([The openbsd malloc port is deprecated in Tor 0.3.5 and will be removed in a future version.])
  1713. enable_openbsd_malloc=yes
  1714. ],
  1715. [system], [
  1716. # handle this later, including the jemalloc fallback
  1717. AC_CHECK_FUNCS(mallinfo)
  1718. ],
  1719. [AC_MSG_ERROR([--with-malloc=`$with_malloc' not supported, see --help])
  1720. ])
  1721. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  1722. if test "$malloc" != "system"; then
  1723. # Tell the C compiler not to use the system allocator functions.
  1724. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1725. fi
  1726. if test "$using_custom_malloc" = "yes"; then
  1727. # Tell the C compiler not to use the system allocator functions.
  1728. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1729. fi
  1730. # By default, we're going to assume we don't have mlockall()
  1731. # bionic and other platforms have various broken mlockall subsystems.
  1732. # Some systems don't have a working mlockall, some aren't linkable,
  1733. # and some have it but don't declare it.
  1734. AC_CHECK_FUNCS(mlockall)
  1735. AC_CHECK_DECLS([mlockall], , , [
  1736. #ifdef HAVE_SYS_MMAN_H
  1737. #include <sys/mman.h>
  1738. #endif])
  1739. # Allow user to specify an alternate syslog facility
  1740. AC_ARG_WITH(syslog-facility,
  1741. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1742. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1743. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1744. AC_SUBST(LOGFACILITY)
  1745. # Check if we have getresuid and getresgid
  1746. AC_CHECK_FUNCS(getresuid getresgid)
  1747. # Check for gethostbyname_r in all its glorious incompatible versions.
  1748. # (This logic is based on that in Python's configure.in)
  1749. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1750. [Define this if you have any gethostbyname_r()])
  1751. AC_CHECK_FUNC(gethostbyname_r, [
  1752. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1753. OLD_CFLAGS=$CFLAGS
  1754. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1755. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1756. #include <netdb.h>
  1757. ]], [[
  1758. char *cp1, *cp2;
  1759. struct hostent *h1, *h2;
  1760. int i1, i2;
  1761. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1762. ]])],[
  1763. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1764. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1765. [Define this if gethostbyname_r takes 6 arguments])
  1766. AC_MSG_RESULT(6)
  1767. ], [
  1768. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1769. #include <netdb.h>
  1770. ]], [[
  1771. char *cp1, *cp2;
  1772. struct hostent *h1;
  1773. int i1, i2;
  1774. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1775. ]])], [
  1776. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1777. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1778. [Define this if gethostbyname_r takes 5 arguments])
  1779. AC_MSG_RESULT(5)
  1780. ], [
  1781. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1782. #include <netdb.h>
  1783. ]], [[
  1784. char *cp1;
  1785. struct hostent *h1;
  1786. struct hostent_data hd;
  1787. (void) gethostbyname_r(cp1,h1,&hd);
  1788. ]])], [
  1789. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1790. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1791. [Define this if gethostbyname_r takes 3 arguments])
  1792. AC_MSG_RESULT(3)
  1793. ], [
  1794. AC_MSG_RESULT(0)
  1795. ])
  1796. ])
  1797. ])
  1798. CFLAGS=$OLD_CFLAGS
  1799. ])
  1800. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1801. tor_cv_have_func_macro,
  1802. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1803. #include <stdio.h>
  1804. int main(int c, char **v) { puts(__func__); }])],
  1805. tor_cv_have_func_macro=yes,
  1806. tor_cv_have_func_macro=no))
  1807. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1808. tor_cv_have_FUNC_macro,
  1809. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1810. #include <stdio.h>
  1811. int main(int c, char **v) { puts(__FUNC__); }])],
  1812. tor_cv_have_FUNC_macro=yes,
  1813. tor_cv_have_FUNC_macro=no))
  1814. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1815. tor_cv_have_FUNCTION_macro,
  1816. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1817. #include <stdio.h>
  1818. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1819. tor_cv_have_FUNCTION_macro=yes,
  1820. tor_cv_have_FUNCTION_macro=no))
  1821. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1822. tor_cv_have_environ_declared,
  1823. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1824. #ifdef HAVE_UNISTD_H
  1825. #include <unistd.h>
  1826. #endif
  1827. #include <stdlib.h>
  1828. int main(int c, char **v) { char **t = environ; }])],
  1829. tor_cv_have_environ_declared=yes,
  1830. tor_cv_have_environ_declared=no))
  1831. if test "$tor_cv_have_func_macro" = "yes"; then
  1832. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1833. fi
  1834. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1835. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1836. fi
  1837. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1838. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1839. [Defined if the compiler supports __FUNCTION__])
  1840. fi
  1841. if test "$tor_cv_have_environ_declared" = "yes"; then
  1842. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1843. [Defined if we have extern char **environ already declared])
  1844. fi
  1845. # $prefix stores the value of the --prefix command line option, or
  1846. # NONE if the option wasn't set. In the case that it wasn't set, make
  1847. # it be the default, so that we can use it to expand directories now.
  1848. if test "x$prefix" = "xNONE"; then
  1849. prefix=$ac_default_prefix
  1850. fi
  1851. # and similarly for $exec_prefix
  1852. if test "x$exec_prefix" = "xNONE"; then
  1853. exec_prefix=$prefix
  1854. fi
  1855. if test "x$BUILDDIR" = "x"; then
  1856. BUILDDIR=`pwd`
  1857. fi
  1858. AC_SUBST(BUILDDIR)
  1859. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1860. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1861. if test "x$SRCDIR" = "x"; then
  1862. SRCDIR=$(cd "$srcdir"; pwd)
  1863. fi
  1864. AH_TEMPLATE([SRCDIR],[tor's sourcedir directory])
  1865. AC_DEFINE_UNQUOTED(SRCDIR,"$SRCDIR")
  1866. if test "x$CONFDIR" = "x"; then
  1867. CONFDIR=`eval echo $sysconfdir/tor`
  1868. fi
  1869. AC_SUBST(CONFDIR)
  1870. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1871. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1872. BINDIR=`eval echo $bindir`
  1873. AC_SUBST(BINDIR)
  1874. LOCALSTATEDIR=`eval echo $localstatedir`
  1875. AC_SUBST(LOCALSTATEDIR)
  1876. if test "$bwin32" = "true"; then
  1877. # Test if the linker supports the --nxcompat and --dynamicbase options
  1878. # for Windows
  1879. save_LDFLAGS="$LDFLAGS"
  1880. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1881. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1882. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1883. [AC_MSG_RESULT([yes])]
  1884. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1885. [AC_MSG_RESULT([no])]
  1886. )
  1887. LDFLAGS="$save_LDFLAGS"
  1888. fi
  1889. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1890. # than autoconf's macros like.
  1891. if test "$GCC" = "yes"; then
  1892. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1893. # accident waiting to happen.
  1894. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1895. else
  1896. # Override optimization level for non-gcc compilers
  1897. CFLAGS="$CFLAGS -O"
  1898. enable_gcc_warnings=no
  1899. enable_gcc_warnings_advisory=no
  1900. fi
  1901. # Warnings implies advisory-warnings and -Werror.
  1902. if test "$enable_gcc_warnings" = "yes"; then
  1903. enable_gcc_warnings_advisory=yes
  1904. enable_fatal_warnings=yes
  1905. fi
  1906. # OS X Lion started deprecating the system openssl. Let's just disable
  1907. # all deprecation warnings on OS X. Also, to potentially make the binary
  1908. # a little smaller, let's enable dead_strip.
  1909. case "$host_os" in
  1910. darwin*)
  1911. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1912. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1913. esac
  1914. TOR_WARNING_FLAGS=""
  1915. # Add some more warnings which we use in development but not in the
  1916. # released versions. (Some relevant gcc versions can't handle these.)
  1917. #
  1918. # Note that we have to do this near the end of the autoconf process, or
  1919. # else we may run into problems when these warnings hit on the testing C
  1920. # programs that autoconf wants to build.
  1921. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1922. case "$host" in
  1923. *-*-openbsd* | *-*-bitrig*)
  1924. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1925. # That's fine, except that the headers don't pass -Wredundant-decls.
  1926. # Therefore, let's disable -Wsystem-headers when we're building
  1927. # with maximal warnings on OpenBSD.
  1928. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1929. esac
  1930. CFLAGS_NOWARNINGS="$CFLAGS"
  1931. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1932. # have it work better.
  1933. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1934. # This warning was added in gcc 4.3, but it appears to generate
  1935. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1936. #CFLAGS="$CFLAGS -Wlogical-op"
  1937. m4_foreach_w([warning_flag], [
  1938. -Waddress
  1939. -Waddress-of-array-temporary
  1940. -Waddress-of-temporary
  1941. -Wambiguous-macro
  1942. -Wanonymous-pack-parens
  1943. -Warc
  1944. -Warc-abi
  1945. -Warc-bridge-casts-disallowed-in-nonarc
  1946. -Warc-maybe-repeated-use-of-weak
  1947. -Warc-performSelector-leaks
  1948. -Warc-repeated-use-of-weak
  1949. -Warray-bounds
  1950. -Warray-bounds-pointer-arithmetic
  1951. -Wasm
  1952. -Wasm-operand-widths
  1953. -Watomic-properties
  1954. -Watomic-property-with-user-defined-accessor
  1955. -Wauto-import
  1956. -Wauto-storage-class
  1957. -Wauto-var-id
  1958. -Wavailability
  1959. -Wbackslash-newline-escape
  1960. -Wbad-array-new-length
  1961. -Wbind-to-temporary-copy
  1962. -Wbitfield-constant-conversion
  1963. -Wbool-conversion
  1964. -Wbool-conversions
  1965. -Wbuiltin-requires-header
  1966. -Wchar-align
  1967. -Wcompare-distinct-pointer-types
  1968. -Wcomplex-component-init
  1969. -Wconditional-type-mismatch
  1970. -Wconfig-macros
  1971. -Wconstant-conversion
  1972. -Wconstant-logical-operand
  1973. -Wconstexpr-not-const
  1974. -Wcustom-atomic-properties
  1975. -Wdangling-field
  1976. -Wdangling-initializer-list
  1977. -Wdate-time
  1978. -Wdelegating-ctor-cycles
  1979. -Wdeprecated-implementations
  1980. -Wdeprecated-register
  1981. -Wdirect-ivar-access
  1982. -Wdiscard-qual
  1983. -Wdistributed-object-modifiers
  1984. -Wdivision-by-zero
  1985. -Wdollar-in-identifier-extension
  1986. -Wdouble-promotion
  1987. -Wduplicate-decl-specifier
  1988. -Wduplicate-enum
  1989. -Wduplicate-method-arg
  1990. -Wduplicate-method-match
  1991. -Wduplicated-cond
  1992. -Wdynamic-class-memaccess
  1993. -Wembedded-directive
  1994. -Wempty-translation-unit
  1995. -Wenum-conversion
  1996. -Wexit-time-destructors
  1997. -Wexplicit-ownership-type
  1998. -Wextern-initializer
  1999. -Wextra
  2000. -Wextra-semi
  2001. -Wextra-tokens
  2002. -Wflexible-array-extensions
  2003. -Wfloat-conversion
  2004. -Wformat-non-iso
  2005. -Wfour-char-constants
  2006. -Wgcc-compat
  2007. -Wglobal-constructors
  2008. -Wgnu-array-member-paren-init
  2009. -Wgnu-designator
  2010. -Wgnu-static-float-init
  2011. -Wheader-guard
  2012. -Wheader-hygiene
  2013. -Widiomatic-parentheses
  2014. -Wignored-attributes
  2015. -Wimplicit-atomic-properties
  2016. -Wimplicit-conversion-floating-point-to-bool
  2017. -Wimplicit-exception-spec-mismatch
  2018. -Wimplicit-fallthrough
  2019. -Wimplicit-fallthrough-per-function
  2020. -Wimplicit-retain-self
  2021. -Wimport-preprocessor-directive-pedantic
  2022. -Wincompatible-library-redeclaration
  2023. -Wincompatible-pointer-types-discards-qualifiers
  2024. -Wincomplete-implementation
  2025. -Wincomplete-module
  2026. -Wincomplete-umbrella
  2027. -Winit-self
  2028. -Wint-conversions
  2029. -Wint-to-void-pointer-cast
  2030. -Winteger-overflow
  2031. -Winvalid-constexpr
  2032. -Winvalid-iboutlet
  2033. -Winvalid-noreturn
  2034. -Winvalid-pp-token
  2035. -Winvalid-source-encoding
  2036. -Winvalid-token-paste
  2037. -Wknr-promoted-parameter
  2038. -Wlarge-by-value-copy
  2039. -Wliteral-conversion
  2040. -Wliteral-range
  2041. -Wlocal-type-template-args
  2042. -Wlogical-op
  2043. -Wloop-analysis
  2044. -Wmain-return-type
  2045. -Wmalformed-warning-check
  2046. -Wmethod-signatures
  2047. -Wmicrosoft
  2048. -Wmicrosoft-exists
  2049. -Wmismatched-parameter-types
  2050. -Wmismatched-return-types
  2051. -Wmissing-field-initializers
  2052. -Wmissing-format-attribute
  2053. -Wmissing-noreturn
  2054. -Wmissing-selector-name
  2055. -Wmissing-sysroot
  2056. -Wmissing-variable-declarations
  2057. -Wmodule-conflict
  2058. -Wnested-anon-types
  2059. -Wnewline-eof
  2060. -Wnon-literal-null-conversion
  2061. -Wnon-pod-varargs
  2062. -Wnonportable-cfstrings
  2063. -Wnormalized=nfkc
  2064. -Wnull-arithmetic
  2065. -Wnull-character
  2066. -Wnull-conversion
  2067. -Wnull-dereference
  2068. -Wout-of-line-declaration
  2069. -Wover-aligned
  2070. -Woverlength-strings
  2071. -Woverride-init
  2072. -Woverriding-method-mismatch
  2073. -Wpointer-type-mismatch
  2074. -Wpredefined-identifier-outside-function
  2075. -Wprotocol-property-synthesis-ambiguity
  2076. -Wreadonly-iboutlet-property
  2077. -Wreadonly-setter-attrs
  2078. -Wreceiver-expr
  2079. -Wreceiver-forward-class
  2080. -Wreceiver-is-weak
  2081. -Wreinterpret-base-class
  2082. -Wrequires-super-attribute
  2083. -Wreserved-user-defined-literal
  2084. -Wreturn-stack-address
  2085. -Wsection
  2086. -Wselector-type-mismatch
  2087. -Wsentinel
  2088. -Wserialized-diagnostics
  2089. -Wshadow
  2090. -Wshift-count-negative
  2091. -Wshift-count-overflow
  2092. -Wshift-negative-value
  2093. -Wshift-overflow=2
  2094. -Wshift-sign-overflow
  2095. -Wshorten-64-to-32
  2096. -Wsizeof-array-argument
  2097. -Wsource-uses-openmp
  2098. -Wstatic-float-init
  2099. -Wstatic-in-inline
  2100. -Wstatic-local-in-inline
  2101. -Wstrict-overflow=1
  2102. -Wstring-compare
  2103. -Wstring-conversion
  2104. -Wstrlcpy-strlcat-size
  2105. -Wstrncat-size
  2106. -Wsuggest-attribute=format
  2107. -Wsuggest-attribute=noreturn
  2108. -Wsuper-class-method-mismatch
  2109. -Wswitch-bool
  2110. -Wsync-nand
  2111. -Wtautological-constant-out-of-range-compare
  2112. -Wtentative-definition-incomplete-type
  2113. -Wtrampolines
  2114. -Wtype-safety
  2115. -Wtypedef-redefinition
  2116. -Wtypename-missing
  2117. -Wundefined-inline
  2118. -Wundefined-internal
  2119. -Wundefined-reinterpret-cast
  2120. -Wunicode
  2121. -Wunicode-whitespace
  2122. -Wunknown-warning-option
  2123. -Wunnamed-type-template-args
  2124. -Wunneeded-member-function
  2125. -Wunsequenced
  2126. -Wunsupported-visibility
  2127. -Wunused-but-set-parameter
  2128. -Wunused-but-set-variable
  2129. -Wunused-command-line-argument
  2130. -Wunused-const-variable=2
  2131. -Wunused-exception-parameter
  2132. -Wunused-local-typedefs
  2133. -Wunused-member-function
  2134. -Wunused-sanitize-argument
  2135. -Wunused-volatile-lvalue
  2136. -Wuser-defined-literals
  2137. -Wvariadic-macros
  2138. -Wvector-conversion
  2139. -Wvector-conversions
  2140. -Wvexing-parse
  2141. -Wvisibility
  2142. -Wvla-extension
  2143. -Wzero-length-array
  2144. ], [ TOR_TRY_COMPILE_WITH_CFLAGS(warning_flag, [],
  2145. [TOR_WARNING_FLAGS="$TOR_WARNING_FLAGS warning_flag" CFLAGS="$CFLAGS warning_flag"], true)
  2146. ])
  2147. dnl We should re-enable this in some later version. Clang doesn't
  2148. dnl mind, but it causes trouble with GCC.
  2149. dnl -Wstrict-overflow=2
  2150. dnl These seem to require annotations that we don't currently use,
  2151. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  2152. dnl -Wthread-safety
  2153. dnl -Wthread-safety-analysis
  2154. dnl -Wthread-safety-attributes
  2155. dnl -Wthread-safety-beta
  2156. dnl -Wthread-safety-precise
  2157. W_FLAGS="$W_FLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  2158. W_FLAGS="$W_FLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  2159. W_FLAGS="$W_FLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  2160. W_FLAGS="$W_FLAGS -Wwrite-strings"
  2161. W_FLAGS="$W_FLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  2162. W_FLAGS="$W_FLAGS -Waggregate-return -Wpacked -Wunused"
  2163. W_FLAGS="$W_FLAGS -Wunused-parameter "
  2164. # These interfere with building main() { return 0; }, which autoconf
  2165. # likes to use as its default program.
  2166. W_FLAGS="$W_FLAGS -Wold-style-definition -Wmissing-declarations"
  2167. TOR_WARNING_FLAGS="$TOR_WARNING_FLAGS $W_FLAGS"
  2168. CFLAGS="$CFLAGS $W_FLAGS"
  2169. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  2170. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  2171. fi
  2172. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  2173. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  2174. fi
  2175. if test "$tor_cv_cflags__warn_unused_const_variable_2" = "yes"; then
  2176. AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
  2177. fi
  2178. CFLAGS="$CFLAGS_NOWARNINGS"
  2179. if test "x$enable_fatal_warnings" = "xyes"; then
  2180. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  2181. # default autoconf programs are full of errors.
  2182. CFLAGS="$CFLAGS -Werror"
  2183. fi
  2184. fi
  2185. AC_SUBST(TOR_WARNING_FLAGS)
  2186. echo "$TOR_WARNING_FLAGS">warning_flags
  2187. TOR_TRY_COMPILE_WITH_CFLAGS([@warning_flags], [],
  2188. CFLAGS="$CFLAGS @warning_flags",
  2189. CFLAGS="$CFLAGS $TOR_WARNING_FLAGS")
  2190. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  2191. case "$host_os" in
  2192. darwin*)
  2193. 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.])
  2194. esac
  2195. fi
  2196. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  2197. AC_CONFIG_FILES([
  2198. Doxyfile
  2199. Makefile
  2200. config.rust
  2201. contrib/operator-tools/tor.logrotate
  2202. contrib/dist/tor.service
  2203. src/config/torrc.sample
  2204. src/config/torrc.minimal
  2205. src/rust/.cargo/config
  2206. scripts/maint/checkOptionDocs.pl
  2207. warning_flags
  2208. ])
  2209. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  2210. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  2211. for file in $regular_mans ; do
  2212. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  2213. echo "==================================";
  2214. echo;
  2215. echo "Building Tor has failed since manpages cannot be built.";
  2216. echo;
  2217. echo "You need asciidoc installed to be able to build the manpages.";
  2218. echo "To build without manpages, use the --disable-asciidoc argument";
  2219. echo "when calling configure.";
  2220. echo;
  2221. echo "==================================";
  2222. exit 1;
  2223. fi
  2224. done
  2225. fi
  2226. if test "$fragile_hardening" = "yes"; then
  2227. AC_MSG_WARN([
  2228. ============
  2229. Warning! Building Tor with --enable-fragile-hardening (also known as
  2230. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  2231. other kinds of attacks easier. A Tor instance build with this option will be
  2232. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  2233. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  2234. denial of service attacks. For more information, see
  2235. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  2236. ============
  2237. ])
  2238. fi
  2239. AC_OUTPUT