configure.ac 74 KB

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  1. dnl Copyright (c) 2001-2004, Roger Dingledine
  2. dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
  3. dnl Copyright (c) 2007-2018, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_PREREQ([2.63])
  6. AC_INIT([tor],[0.3.5.0-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/app/main/tor_main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_USE_SYSTEM_EXTENSIONS
  16. AC_CANONICAL_HOST
  17. PKG_PROG_PKG_CONFIG
  18. AC_ARG_ENABLE(openbsd-malloc,
  19. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  20. AC_ARG_ENABLE(static-openssl,
  21. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  22. AC_ARG_ENABLE(static-libevent,
  23. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  24. AC_ARG_ENABLE(static-zlib,
  25. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  26. AC_ARG_ENABLE(static-tor,
  27. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  28. AC_ARG_ENABLE(unittests,
  29. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  30. AC_ARG_ENABLE(coverage,
  31. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  32. AC_ARG_ENABLE(asserts-in-tests,
  33. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  34. AC_ARG_ENABLE(system-torrc,
  35. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  36. AC_ARG_ENABLE(libfuzzer,
  37. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  38. AC_ARG_ENABLE(oss-fuzz,
  39. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  40. AC_ARG_ENABLE(memory-sentinels,
  41. AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
  42. AC_ARG_ENABLE(rust,
  43. AS_HELP_STRING(--enable-rust, [enable rust integration]))
  44. AC_ARG_ENABLE(cargo-online-mode,
  45. AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
  46. AC_ARG_ENABLE(restart-debugging,
  47. AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
  48. AC_ARG_ENABLE(zstd-advanced-apis,
  49. AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
  50. AC_ARG_ENABLE(nss,
  51. AS_HELP_STRING(--enable-nss, [Use Mozilla's NSS TLS library. (EXPERIMENTAL)]))
  52. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  53. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  54. fi
  55. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  56. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  57. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  58. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  59. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  60. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  61. AM_CONDITIONAL(USE_NSS, test "x$enable_nss" = "xyes")
  62. AM_CONDITIONAL(USE_OPENSSL, test "x$enable_nss" != "xyes")
  63. if test "x$enable_nss" = "xyes"; then
  64. AC_DEFINE(ENABLE_NSS, 1,
  65. [Defined if we're building with NSS in addition to OpenSSL.])
  66. else
  67. AC_DEFINE(ENABLE_OPENSSL, 1,
  68. [Defined if we're building with OpenSSL or LibreSSL])
  69. fi
  70. if test "$enable_static_tor" = "yes"; then
  71. enable_static_libevent="yes";
  72. enable_static_openssl="yes";
  73. enable_static_zlib="yes";
  74. CFLAGS="$CFLAGS -static"
  75. fi
  76. if test "$enable_system_torrc" = "no"; then
  77. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  78. [Defined if we're not going to look for a torrc in SYSCONF])
  79. fi
  80. if test "$enable_memory_sentinels" = "no"; then
  81. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  82. [Defined if we're turning off memory safety code to look for bugs])
  83. fi
  84. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  85. AC_ARG_ENABLE(asciidoc,
  86. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  87. [case "${enableval}" in
  88. "yes") asciidoc=true ;;
  89. "no") asciidoc=false ;;
  90. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  91. esac], [asciidoc=true])
  92. # systemd notify support
  93. AC_ARG_ENABLE(systemd,
  94. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  95. [case "${enableval}" in
  96. "yes") systemd=true ;;
  97. "no") systemd=false ;;
  98. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  99. esac], [systemd=auto])
  100. if test "$enable_restart_debugging" = "yes"; then
  101. AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
  102. [Defined if we're building with support for in-process restart debugging.])
  103. fi
  104. if test "$enable_zstd_advanced_apis" != "no"; then
  105. AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
  106. [Defined if we're going to try to use zstd's "static-only" APIs.])
  107. fi
  108. # systemd support
  109. if test "x$enable_systemd" = "xno"; then
  110. have_systemd=no;
  111. else
  112. PKG_CHECK_MODULES(SYSTEMD,
  113. [libsystemd-daemon],
  114. have_systemd=yes,
  115. have_systemd=no)
  116. if test "x$have_systemd" = "xno"; then
  117. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  118. PKG_CHECK_MODULES(SYSTEMD,
  119. [libsystemd],
  120. have_systemd=yes,
  121. have_systemd=no)
  122. fi
  123. fi
  124. if test "x$have_systemd" = "xyes"; then
  125. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  126. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  127. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  128. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  129. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  130. fi
  131. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  132. AC_SUBST(TOR_SYSTEMD_LIBS)
  133. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  134. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  135. fi
  136. case "$host" in
  137. *-*-solaris* )
  138. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  139. ;;
  140. esac
  141. AC_ARG_ENABLE(gcc-warnings,
  142. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  143. AC_ARG_ENABLE(fatal-warnings,
  144. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  145. AC_ARG_ENABLE(gcc-warnings-advisory,
  146. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  147. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  148. AC_ARG_ENABLE(gcc-hardening,
  149. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  150. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  151. AC_ARG_ENABLE(expensive-hardening,
  152. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  153. AC_ARG_ENABLE(fragile-hardening,
  154. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  155. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  156. fragile_hardening="yes"
  157. AC_DEFINE(DEBUG_SMARTLIST, 1, [Enable smartlist debugging])
  158. fi
  159. dnl Linker hardening options
  160. dnl Currently these options are ELF specific - you can't use this with MacOSX
  161. AC_ARG_ENABLE(linker-hardening,
  162. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  163. AC_ARG_ENABLE(local-appdata,
  164. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  165. if test "$enable_local_appdata" = "yes"; then
  166. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  167. [Defined if we default to host local appdata paths on Windows])
  168. fi
  169. # Tor2web mode flag
  170. AC_ARG_ENABLE(tor2web-mode,
  171. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  172. [if test "x$enableval" = "xyes"; then
  173. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  174. fi])
  175. AC_ARG_ENABLE(tool-name-check,
  176. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  177. AC_ARG_ENABLE(seccomp,
  178. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  179. AC_ARG_ENABLE(libscrypt,
  180. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  181. dnl Enable event tracing which are transformed to debug log statement.
  182. AC_ARG_ENABLE(event-tracing-debug,
  183. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  184. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  185. if test x$enable_event_tracing_debug = xyes; then
  186. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  187. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  188. fi
  189. dnl Enable Android only features.
  190. AC_ARG_ENABLE(android,
  191. AS_HELP_STRING(--enable-android, [build with Android features enabled]))
  192. AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
  193. if test "x$enable_android" = "xyes"; then
  194. AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
  195. dnl Check if the Android log library is available.
  196. AC_CHECK_HEADERS([android/log.h])
  197. AC_SEARCH_LIBS(__android_log_write, [log])
  198. fi
  199. dnl ---
  200. dnl Tor modules options. These options are namespaced with --disable-module-XXX
  201. dnl ---
  202. dnl All our modules.
  203. m4_define(MODULES, dirauth)
  204. dnl Directory Authority module.
  205. AC_ARG_ENABLE([module-dirauth],
  206. AS_HELP_STRING([--disable-module-dirauth],
  207. [Do not build tor with the dirauth module]),
  208. [], dnl Action if-given
  209. AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
  210. [Compile with Directory Authority feature support]))
  211. AM_CONDITIONAL(BUILD_MODULE_DIRAUTH, [test "x$enable_module_dirauth" != "xno"])
  212. dnl Helper variables.
  213. TOR_MODULES_ALL_ENABLED=
  214. AC_DEFUN([ADD_MODULE], [
  215. MODULE=m4_toupper($1)
  216. TOR_MODULES_ALL_ENABLED="${TOR_MODULES_ALL_ENABLED} -DHAVE_MODULE_${MODULE}=1"
  217. ])
  218. m4_foreach_w([module], MODULES, [ADD_MODULE([module])])
  219. AC_SUBST(TOR_MODULES_ALL_ENABLED)
  220. dnl check for the correct "ar" when cross-compiling.
  221. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  222. dnl so kludge up a replacement for the case where it isn't there yet.)
  223. m4_ifdef([AM_PROG_AR],
  224. [AM_PROG_AR],
  225. [AN_MAKEVAR([AR], [AC_PROG_AR])
  226. AN_PROGRAM([ar], [AC_PROG_AR])
  227. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  228. AC_PROG_AR])
  229. dnl Check whether the above macro has settled for a simply named tool even
  230. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  231. dnl because that will find any cc on the system, not only the cross-compiler,
  232. dnl and then verify that a binary built with this compiler runs on the
  233. dnl build system. It will then come to the false conclusion that we're not
  234. dnl cross-compiling.
  235. if test "x$enable_tool_name_check" != "xno"; then
  236. if test "x$ac_tool_warned" = "xyes"; then
  237. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  238. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  239. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  240. fi
  241. fi
  242. AC_PROG_CC
  243. AC_PROG_CPP
  244. AC_PROG_MAKE_SET
  245. AC_PROG_RANLIB
  246. AC_PROG_SED
  247. AC_ARG_VAR([PERL], [path to Perl binary])
  248. AC_CHECK_PROGS([PERL], [perl])
  249. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  250. dnl check for asciidoc and a2x
  251. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  252. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  253. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  254. AM_PROG_CC_C_O
  255. AC_PROG_CC_C99
  256. AC_ARG_VAR([PYTHON], [path to Python binary])
  257. AC_CHECK_PROGS(PYTHON, [ \
  258. python3 \
  259. python3.8 python3.7 python3.6 python3.5 python3.4 \
  260. python \
  261. python2 python2.7])
  262. if test "x$PYTHON" = "x"; then
  263. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  264. fi
  265. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  266. dnl List all external rust crates we depend on here. Include the version
  267. rust_crates=" \
  268. digest-0.7.2 \
  269. libc-0.2.39 \
  270. "
  271. AC_SUBST(rust_crates)
  272. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  273. AC_C_FLEXIBLE_ARRAY_MEMBER
  274. ], [
  275. dnl Maybe we've got an old autoconf...
  276. AC_CACHE_CHECK([for flexible array members],
  277. tor_cv_c_flexarray,
  278. [AC_COMPILE_IFELSE(
  279. AC_LANG_PROGRAM([
  280. struct abc { int a; char b[]; };
  281. ], [
  282. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  283. def->b[0] = 33;
  284. ]),
  285. [tor_cv_c_flexarray=yes],
  286. [tor_cv_c_flexarray=no])])
  287. if test "$tor_cv_flexarray" = "yes"; then
  288. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  289. else
  290. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  291. fi
  292. ])
  293. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  294. tor_cv_c_c99_decl,
  295. [AC_COMPILE_IFELSE(
  296. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  297. [tor_cv_c_c99_decl=yes],
  298. [tor_cv_c_c99_decl=no] )])
  299. if test "$tor_cv_c_c99_decl" != "yes"; then
  300. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  301. fi
  302. AC_CACHE_CHECK([for working C99 designated initializers],
  303. tor_cv_c_c99_designated_init,
  304. [AC_COMPILE_IFELSE(
  305. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  306. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  307. [tor_cv_c_c99_designated_init=yes],
  308. [tor_cv_c_c99_designated_init=no] )])
  309. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  310. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  311. fi
  312. TORUSER=_tor
  313. AC_ARG_WITH(tor-user,
  314. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  315. [
  316. TORUSER=$withval
  317. ]
  318. )
  319. AC_SUBST(TORUSER)
  320. TORGROUP=_tor
  321. AC_ARG_WITH(tor-group,
  322. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  323. [
  324. TORGROUP=$withval
  325. ]
  326. )
  327. AC_SUBST(TORGROUP)
  328. dnl If _WIN32 is defined and non-zero, we are building for win32
  329. AC_MSG_CHECKING([for win32])
  330. AC_RUN_IFELSE([AC_LANG_SOURCE([
  331. int main(int c, char **v) {
  332. #ifdef _WIN32
  333. #if _WIN32
  334. return 0;
  335. #else
  336. return 1;
  337. #endif
  338. #else
  339. return 2;
  340. #endif
  341. }])],
  342. bwin32=true; AC_MSG_RESULT([yes]),
  343. bwin32=false; AC_MSG_RESULT([no]),
  344. bwin32=cross; AC_MSG_RESULT([cross])
  345. )
  346. if test "$bwin32" = "cross"; then
  347. AC_MSG_CHECKING([for win32 (cross)])
  348. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  349. #ifdef _WIN32
  350. int main(int c, char **v) {return 0;}
  351. #else
  352. #error
  353. int main(int c, char **v) {return x(y);}
  354. #endif
  355. ])],
  356. bwin32=true; AC_MSG_RESULT([yes]),
  357. bwin32=false; AC_MSG_RESULT([no]))
  358. fi
  359. AH_BOTTOM([
  360. #ifdef _WIN32
  361. /* Defined to access windows functions and definitions for >=WinXP */
  362. # ifndef WINVER
  363. # define WINVER 0x0501
  364. # endif
  365. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  366. # ifndef _WIN32_WINNT
  367. # define _WIN32_WINNT 0x0501
  368. # endif
  369. /* Defined to avoid including some windows headers as part of Windows.h */
  370. # ifndef WIN32_LEAN_AND_MEAN
  371. # define WIN32_LEAN_AND_MEAN 1
  372. # endif
  373. #endif
  374. ])
  375. AM_CONDITIONAL(WIN32, test "x$bwin32" = "xtrue")
  376. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  377. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  378. dnl Enable C99 when compiling with MIPSpro
  379. AC_MSG_CHECKING([for MIPSpro compiler])
  380. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  381. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  382. #error
  383. return x(y);
  384. #endif
  385. ])],
  386. bmipspro=false; AC_MSG_RESULT(no),
  387. bmipspro=true; AC_MSG_RESULT(yes))
  388. if test "$bmipspro" = "true"; then
  389. CFLAGS="$CFLAGS -c99"
  390. fi
  391. AC_C_BIGENDIAN
  392. AC_ARG_VAR([TOR_RUST_TARGET], [Rust target, must be specified when cross-compiling (HOST != BUILD). example: i686-pc-windows-gnu])
  393. if test "x$enable_rust" = "xyes"; then
  394. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  395. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  396. if test "x$RUSTC" = "xno"; then
  397. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  398. fi
  399. AC_ARG_VAR([CARGO], [path to the cargo binary])
  400. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  401. if test "x$CARGO" = "xno"; then
  402. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  403. fi
  404. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  405. if test "x$enable_fatal_warnings" = "xyes"; then
  406. RUST_WARN=
  407. else
  408. RUST_WARN=#
  409. fi
  410. if test "x$enable_cargo_online_mode" = "xyes"; then
  411. CARGO_ONLINE=
  412. RUST_DL=#
  413. else
  414. CARGO_ONLINE=--frozen
  415. RUST_DL=
  416. dnl When we're not allowed to touch the network, we need crate dependencies
  417. dnl locally available.
  418. AC_MSG_CHECKING([rust crate dependencies])
  419. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  420. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  421. TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
  422. fi
  423. dnl Check whether the path exists before we try to cd into it.
  424. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  425. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  426. ERRORED=1
  427. fi
  428. dnl Make the path absolute, since we'll be using it from within a
  429. dnl subdirectory.
  430. TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
  431. for dep in $rust_crates; do
  432. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  433. 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.])
  434. ERRORED=1
  435. fi
  436. done
  437. if test "x$ERRORED" = "x"; then
  438. AC_MSG_RESULT([yes])
  439. fi
  440. fi
  441. dnl This is a workaround for #46797
  442. dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ). Once the
  443. dnl upstream bug is fixed, we can remove this workaround.
  444. case "$host_os" in
  445. darwin*)
  446. TOR_RUST_EXTRA_LIBS="-lresolv"
  447. ;;
  448. esac
  449. dnl For now both MSVC and MinGW rust libraries will output static libs with
  450. dnl the MSVC naming convention.
  451. if test "$bwin32" = "true"; then
  452. tor_rust_static_name=tor_rust.lib
  453. else
  454. tor_rust_static_name=libtor_rust.a
  455. fi
  456. AC_CANONICAL_BUILD
  457. if test -n "$TOR_RUST_TARGET"; then
  458. if test "$host" = "$build"; then
  459. AC_MSG_ERROR([HOST = BUILD is invalid if TOR_RUST_TARGET is specified, see configure --help for more information.])
  460. fi
  461. RUST_TARGET_PROP="target = '$TOR_RUST_TARGET'"
  462. TOR_RUST_LIB_PATH="src/rust/target/$TOR_RUST_TARGET/release/$tor_rust_static_name"
  463. else
  464. if test "$host" != "$build"; then
  465. AC_MSG_ERROR([TOR_RUST_TARGET must be specified when cross-compiling with Rust enabled.])
  466. fi
  467. RUST_TARGET_PROP=
  468. TOR_RUST_LIB_PATH="src/rust/target/release/$tor_rust_static_name"
  469. fi
  470. AC_SUBST(RUST_TARGET_PROP)
  471. AC_SUBST(TOR_RUST_LIB_PATH)
  472. AC_SUBST(CARGO_ONLINE)
  473. AC_SUBST(RUST_WARN)
  474. AC_SUBST(RUST_DL)
  475. dnl Let's check the rustc version, too
  476. AC_MSG_CHECKING([rust version])
  477. RUSTC_VERSION=`$RUSTC --version`
  478. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  479. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  480. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  481. AC_MSG_ERROR([rustc version couldn't be identified])
  482. fi
  483. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  484. AC_MSG_ERROR([rustc must be at least version 1.14])
  485. fi
  486. AC_MSG_RESULT([$RUSTC_VERSION])
  487. fi
  488. AC_SUBST(TOR_RUST_EXTRA_LIBS)
  489. AC_SEARCH_LIBS(socket, [socket network])
  490. AC_SEARCH_LIBS(gethostbyname, [nsl])
  491. AC_SEARCH_LIBS(dlopen, [dl])
  492. AC_SEARCH_LIBS(inet_aton, [resolv])
  493. AC_SEARCH_LIBS(backtrace, [execinfo])
  494. saved_LIBS="$LIBS"
  495. AC_SEARCH_LIBS([clock_gettime], [rt])
  496. if test "$LIBS" != "$saved_LIBS"; then
  497. # Looks like we need -lrt for clock_gettime().
  498. have_rt=yes
  499. fi
  500. AC_SEARCH_LIBS(pthread_create, [pthread])
  501. AC_SEARCH_LIBS(pthread_detach, [pthread])
  502. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  503. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  504. AC_CHECK_FUNCS(
  505. _NSGetEnviron \
  506. RtlSecureZeroMemory \
  507. SecureZeroMemory \
  508. accept4 \
  509. backtrace \
  510. backtrace_symbols_fd \
  511. eventfd \
  512. explicit_bzero \
  513. timingsafe_memcmp \
  514. flock \
  515. ftime \
  516. get_current_dir_name \
  517. getaddrinfo \
  518. getdelim \
  519. getifaddrs \
  520. getline \
  521. getpass \
  522. getrlimit \
  523. gettimeofday \
  524. gmtime_r \
  525. gnu_get_libc_version \
  526. htonll \
  527. inet_aton \
  528. ioctl \
  529. issetugid \
  530. llround \
  531. localtime_r \
  532. lround \
  533. memmem \
  534. memset_s \
  535. mmap \
  536. pipe \
  537. pipe2 \
  538. prctl \
  539. readpassphrase \
  540. rint \
  541. sigaction \
  542. socketpair \
  543. statvfs \
  544. strncasecmp \
  545. strcasecmp \
  546. strlcat \
  547. strlcpy \
  548. strnlen \
  549. strptime \
  550. strtok_r \
  551. strtoull \
  552. sysconf \
  553. sysctl \
  554. truncate \
  555. uname \
  556. usleep \
  557. vasprintf \
  558. _vscprintf
  559. )
  560. # Apple messed up when they added some functions: they
  561. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  562. # checks.
  563. # We should only probe for these functions if we are sure that we
  564. # are not targeting OS X 10.9 or earlier.
  565. AC_MSG_CHECKING([for a pre-Yosemite OS X build target])
  566. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  567. #ifdef __APPLE__
  568. # include <AvailabilityMacros.h>
  569. # ifndef MAC_OS_X_VERSION_10_10
  570. # define MAC_OS_X_VERSION_10_10 101000
  571. # endif
  572. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  573. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
  574. # error "Running on Mac OS X 10.9 or earlier"
  575. # endif
  576. # endif
  577. #endif
  578. ]], [[]])],
  579. [on_macos_pre_10_10=no ; AC_MSG_RESULT([no])],
  580. [on_macos_pre_10_10=yes; AC_MSG_RESULT([yes])])
  581. if test "$on_macos_pre_10_10" = "no"; then
  582. AC_CHECK_FUNCS(
  583. mach_approximate_time \
  584. )
  585. fi
  586. # We should only probe for these functions if we are sure that we
  587. # are not targeting OSX 10.11 or earlier.
  588. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  589. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  590. #ifdef __APPLE__
  591. # include <AvailabilityMacros.h>
  592. # ifndef MAC_OS_X_VERSION_10_12
  593. # define MAC_OS_X_VERSION_10_12 101200
  594. # endif
  595. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  596. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  597. # error "Running on Mac OSX 10.11 or earlier"
  598. # endif
  599. # endif
  600. #endif
  601. ]], [[]])],
  602. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  603. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  604. if test "$on_macos_pre_10_12" = "no"; then
  605. AC_CHECK_FUNCS(
  606. clock_gettime \
  607. getentropy \
  608. )
  609. fi
  610. if test "$bwin32" != "true"; then
  611. AC_CHECK_HEADERS(pthread.h)
  612. AC_CHECK_FUNCS(pthread_create)
  613. AC_CHECK_FUNCS(pthread_condattr_setclock)
  614. fi
  615. if test "$bwin32" = "true"; then
  616. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  617. #include <windows.h>
  618. #include <conio.h>
  619. #include <wchar.h>
  620. ])
  621. fi
  622. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  623. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  624. AC_MSG_CHECKING([whether free(NULL) works])
  625. AC_RUN_IFELSE([AC_LANG_PROGRAM([
  626. #include <stdlib.h>
  627. ], [
  628. char *p = NULL;
  629. free(p);
  630. ])],
  631. [free_null_ok=true; AC_MSG_RESULT(yes)],
  632. [free_null_ok=false; AC_MSG_RESULT(no)],
  633. [free_null_ok=cross; AC_MSG_RESULT(cross)])
  634. if test "$free_null_ok" = "false"; then
  635. AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
  636. fi
  637. dnl ------------------------------------------------------
  638. dnl Where do you live, libevent? And how do we call you?
  639. if test "$bwin32" = "true"; then
  640. TOR_LIB_WS32=-lws2_32
  641. TOR_LIB_IPHLPAPI=-liphlpapi
  642. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  643. # think it's actually necessary.
  644. TOR_LIB_GDI=-lgdi32
  645. TOR_LIB_USERENV=-luserenv
  646. else
  647. TOR_LIB_WS32=
  648. TOR_LIB_GDI=
  649. TOR_LIB_USERENV=
  650. fi
  651. AC_SUBST(TOR_LIB_WS32)
  652. AC_SUBST(TOR_LIB_GDI)
  653. AC_SUBST(TOR_LIB_IPHLPAPI)
  654. AC_SUBST(TOR_LIB_USERENV)
  655. tor_libevent_pkg_redhat="libevent"
  656. tor_libevent_pkg_debian="libevent-dev"
  657. tor_libevent_devpkg_redhat="libevent-devel"
  658. tor_libevent_devpkg_debian="libevent-dev"
  659. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  660. dnl linking for static builds.
  661. STATIC_LIBEVENT_FLAGS=""
  662. if test "$enable_static_libevent" = "yes"; then
  663. if test "$have_rt" = "yes"; then
  664. STATIC_LIBEVENT_FLAGS=" -lrt "
  665. fi
  666. fi
  667. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  668. #ifdef _WIN32
  669. #include <winsock2.h>
  670. #endif
  671. #include <sys/time.h>
  672. #include <sys/types.h>
  673. #include <event2/event.h>], [
  674. #ifdef _WIN32
  675. #include <winsock2.h>
  676. #endif
  677. struct event_base;
  678. struct event_base *event_base_new(void);
  679. void event_base_free(struct event_base *);],
  680. [
  681. #ifdef _WIN32
  682. {WSADATA d; WSAStartup(0x101,&d); }
  683. #endif
  684. event_base_free(event_base_new());
  685. ], [--with-libevent-dir], [/opt/libevent])
  686. dnl Determine the incantation needed to link libevent.
  687. save_LIBS="$LIBS"
  688. save_LDFLAGS="$LDFLAGS"
  689. save_CPPFLAGS="$CPPFLAGS"
  690. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  691. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  692. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  693. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  694. if test "$enable_static_libevent" = "yes"; then
  695. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  696. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  697. else
  698. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  699. fi
  700. else
  701. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  702. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  703. 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"))
  704. if test "$ac_cv_search_event_new" != "none required"; then
  705. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  706. fi
  707. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  708. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  709. fi
  710. else
  711. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  712. fi
  713. fi
  714. dnl Now check for particular libevent functions.
  715. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  716. evutil_secure_rng_add_bytes \
  717. ])
  718. LIBS="$save_LIBS"
  719. LDFLAGS="$save_LDFLAGS"
  720. CPPFLAGS="$save_CPPFLAGS"
  721. dnl Check that libevent is at least at version 2.0.10, the first stable
  722. dnl release of its series
  723. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  724. AC_MSG_CHECKING([whether Libevent is new enough])
  725. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  726. #include <event2/event.h>
  727. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  728. #error
  729. int x = y(zz);
  730. #else
  731. int x = 1;
  732. #endif
  733. ])], [ AC_MSG_RESULT([yes]) ],
  734. [ AC_MSG_RESULT([no])
  735. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  736. LIBS="$save_LIBS"
  737. LDFLAGS="$save_LDFLAGS"
  738. CPPFLAGS="$save_CPPFLAGS"
  739. AC_SUBST(TOR_LIBEVENT_LIBS)
  740. dnl ------------------------------------------------------
  741. dnl Where do you live, libm?
  742. dnl On some platforms (Haiku/BeOS) the math library is
  743. dnl part of libroot. In which case don't link against lm
  744. TOR_LIB_MATH=""
  745. save_LIBS="$LIBS"
  746. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  747. if test "$ac_cv_search_pow" != "none required"; then
  748. TOR_LIB_MATH="$ac_cv_search_pow"
  749. fi
  750. LIBS="$save_LIBS"
  751. AC_SUBST(TOR_LIB_MATH)
  752. dnl ------------------------------------------------------
  753. dnl Hello, NSS. You're new around here.
  754. if test "x$enable_nss" = "xyes"; then
  755. PKG_CHECK_MODULES(NSS,
  756. [nss],
  757. [have_nss=yes],
  758. [have_nss=no; AC_MSG_ERROR([You asked for NSS but I can't find it.])])
  759. AC_SUBST(NSS_CFLAGS)
  760. AC_SUBST(NSS_LIBS)
  761. fi
  762. dnl ------------------------------------------------------
  763. dnl Where do you live, openssl? And how do we call you?
  764. if test "x$enable_nss" != "xyes"; then
  765. tor_openssl_pkg_redhat="openssl"
  766. tor_openssl_pkg_debian="libssl-dev"
  767. tor_openssl_devpkg_redhat="openssl-devel"
  768. tor_openssl_devpkg_debian="libssl-dev"
  769. ALT_openssl_WITHVAL=""
  770. AC_ARG_WITH(ssl-dir,
  771. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  772. [
  773. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  774. ALT_openssl_WITHVAL="$withval"
  775. fi
  776. ])
  777. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  778. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  779. [#include <openssl/ssl.h>
  780. char *getenv(const char *);],
  781. [struct ssl_cipher_st;
  782. unsigned SSL_CIPHER_get_id(const struct ssl_cipher_st *);
  783. char *getenv(const char *);],
  784. dnl This funny-looking test program calls getenv, so that the compiler
  785. dnl will neither make code that call SSL_CIPHER_get_id(NULL) [producing
  786. dnl a crash], nor optimize out the call to SSL_CIPHER_get_id().
  787. dnl We look for SSL_cipher_get_id() because it is present in
  788. dnl OpenSSL >=1.0.1, because it is not deprecated, and because Tor
  789. dnl depends on it.
  790. [if (getenv("THIS_SHOULDNT_BE_SET_X201803")) SSL_CIPHER_get_id((void *)0);], [],
  791. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  792. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  793. if test "$enable_static_openssl" = "yes"; then
  794. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  795. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  796. else
  797. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  798. fi
  799. else
  800. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  801. fi
  802. AC_SUBST(TOR_OPENSSL_LIBS)
  803. dnl Now check for particular openssl functions.
  804. save_LIBS="$LIBS"
  805. save_LDFLAGS="$LDFLAGS"
  806. save_CPPFLAGS="$CPPFLAGS"
  807. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  808. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  809. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  810. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  811. #include <openssl/opensslv.h>
  812. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  813. #error "too old"
  814. #endif
  815. ]], [[]])],
  816. [ : ],
  817. [ 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.]) ])
  818. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  819. #include <openssl/opensslv.h>
  820. #include <openssl/evp.h>
  821. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  822. #error "no ECC"
  823. #endif
  824. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  825. #error "curves unavailable"
  826. #endif
  827. ]], [[]])],
  828. [ : ],
  829. [ 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.]) ])
  830. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  831. [#include <openssl/ssl.h>
  832. ])
  833. AC_CHECK_FUNCS([ \
  834. ERR_load_KDF_strings \
  835. SSL_SESSION_get_master_key \
  836. SSL_get_server_random \
  837. SSL_get_client_ciphers \
  838. SSL_get_client_random \
  839. SSL_CIPHER_find \
  840. TLS_method
  841. ])
  842. dnl Check if OpenSSL has scrypt implementation.
  843. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  844. dnl Check if OpenSSL structures are opaque
  845. AC_CHECK_MEMBERS([SSL.state], , ,
  846. [#include <openssl/ssl.h>
  847. ])
  848. AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
  849. #include <openssl/sha.h>
  850. ])
  851. fi # enable_nss
  852. dnl ======================================================================
  853. dnl Can we use KIST?
  854. dnl Define the set of checks for KIST scheduler support.
  855. AC_DEFUN([CHECK_KIST_SUPPORT],[
  856. dnl KIST needs struct tcp_info and for certain members to exist.
  857. AC_CHECK_MEMBERS(
  858. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  859. , ,[[#include <netinet/tcp.h>]])
  860. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  861. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  862. #include <linux/sockios.h>
  863. #ifndef SIOCOUTQNSD
  864. #error
  865. #endif
  866. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  867. if test "x$have_siocoutqnsd" = "xyes"; then
  868. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  869. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  870. have_kist_support=yes
  871. fi
  872. fi
  873. fi
  874. ])
  875. dnl Now, trigger the check.
  876. CHECK_KIST_SUPPORT
  877. AS_IF([test "x$have_kist_support" = "xyes"],
  878. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  879. on this system])],
  880. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  881. LIBS="$save_LIBS"
  882. LDFLAGS="$save_LDFLAGS"
  883. CPPFLAGS="$save_CPPFLAGS"
  884. dnl ------------------------------------------------------
  885. dnl Where do you live, zlib? And how do we call you?
  886. tor_zlib_pkg_redhat="zlib"
  887. tor_zlib_pkg_debian="zlib1g"
  888. tor_zlib_devpkg_redhat="zlib-devel"
  889. tor_zlib_devpkg_debian="zlib1g-dev"
  890. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  891. [#include <zlib.h>],
  892. [const char * zlibVersion(void);],
  893. [zlibVersion();], [--with-zlib-dir],
  894. [/opt/zlib])
  895. if test "$enable_static_zlib" = "yes"; then
  896. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  897. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  898. using --enable-static-zlib")
  899. else
  900. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  901. fi
  902. else
  903. TOR_ZLIB_LIBS="-lz"
  904. fi
  905. AC_SUBST(TOR_ZLIB_LIBS)
  906. dnl ------------------------------------------------------
  907. dnl Where we do we find lzma?
  908. AC_ARG_ENABLE(lzma,
  909. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  910. [case "${enableval}" in
  911. "yes") lzma=true ;;
  912. "no") lzma=false ;;
  913. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  914. esac], [lzma=auto])
  915. if test "x$enable_lzma" = "xno"; then
  916. have_lzma=no;
  917. else
  918. PKG_CHECK_MODULES([LZMA],
  919. [liblzma],
  920. have_lzma=yes,
  921. have_lzma=no)
  922. if test "x$have_lzma" = "xno" ; then
  923. AC_MSG_WARN([Unable to find liblzma.])
  924. fi
  925. fi
  926. if test "x$have_lzma" = "xyes"; then
  927. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  928. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  929. TOR_LZMA_LIBS="${LZMA_LIBS}"
  930. fi
  931. AC_SUBST(TOR_LZMA_CFLAGS)
  932. AC_SUBST(TOR_LZMA_LIBS)
  933. dnl ------------------------------------------------------
  934. dnl Where we do we find zstd?
  935. AC_ARG_ENABLE(zstd,
  936. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  937. [case "${enableval}" in
  938. "yes") zstd=true ;;
  939. "no") zstd=false ;;
  940. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  941. esac], [zstd=auto])
  942. if test "x$enable_zstd" = "xno"; then
  943. have_zstd=no;
  944. else
  945. PKG_CHECK_MODULES([ZSTD],
  946. [libzstd >= 1.1],
  947. have_zstd=yes,
  948. have_zstd=no)
  949. if test "x$have_zstd" = "xno" ; then
  950. AC_MSG_WARN([Unable to find libzstd.])
  951. fi
  952. fi
  953. if test "x$have_zstd" = "xyes"; then
  954. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  955. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  956. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  957. dnl now check for zstd functions
  958. save_LIBS="$LIBS"
  959. save_CFLAGS="$CFLAGS"
  960. LIBS="$LIBS $ZSTD_LIBS"
  961. CFLAGS="$CFLAGS $ZSTD_CFLAGS"
  962. AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
  963. ZSTD_estimateDCtxSize)
  964. LIBS="$save_LIBS"
  965. CFLAGS="$save_CFLAGS"
  966. fi
  967. AC_SUBST(TOR_ZSTD_CFLAGS)
  968. AC_SUBST(TOR_ZSTD_LIBS)
  969. dnl ----------------------------------------------------------------------
  970. dnl Check if libcap is available for capabilities.
  971. tor_cap_pkg_debian="libcap2"
  972. tor_cap_pkg_redhat="libcap"
  973. tor_cap_devpkg_debian="libcap-dev"
  974. tor_cap_devpkg_redhat="libcap-devel"
  975. AC_CHECK_LIB([cap], [cap_init], [],
  976. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  977. )
  978. AC_CHECK_FUNCS(cap_set_proc)
  979. dnl ---------------------------------------------------------------------
  980. dnl Now that we know about our major libraries, we can check for compiler
  981. dnl and linker hardening options. We need to do this with the libraries known,
  982. dnl since sometimes the linker will like an option but not be willing to
  983. dnl use it with a build of a library.
  984. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  985. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  986. CFLAGS_FTRAPV=
  987. CFLAGS_FWRAPV=
  988. CFLAGS_ASAN=
  989. CFLAGS_UBSAN=
  990. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  991. #if !defined(__clang__)
  992. #error
  993. #endif])], have_clang=yes, have_clang=no)
  994. if test "x$enable_gcc_hardening" != "xno"; then
  995. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  996. if test "x$have_clang" = "xyes"; then
  997. TOR_CHECK_CFLAGS(-Qunused-arguments)
  998. fi
  999. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  1000. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  1001. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  1002. m4_ifdef([AS_VAR_IF],[
  1003. AS_VAR_IF(can_compile, [yes],
  1004. AS_VAR_IF(can_link, [yes],
  1005. [],
  1006. 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.)]))
  1007. )])
  1008. AS_VAR_POPDEF([can_link])
  1009. AS_VAR_POPDEF([can_compile])
  1010. TOR_CHECK_CFLAGS(-Wstack-protector)
  1011. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  1012. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  1013. TOR_CHECK_CFLAGS(-fPIE)
  1014. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  1015. fi
  1016. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  1017. fi
  1018. if test "$fragile_hardening" = "yes"; then
  1019. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  1020. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  1021. 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.])
  1022. fi
  1023. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  1024. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  1025. fi
  1026. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  1027. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1028. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  1029. fi
  1030. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  1031. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1032. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  1033. fi
  1034. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  1035. fi
  1036. dnl Find the correct libraries to add in order to use the sanitizers.
  1037. dnl
  1038. dnl When building Rust, Cargo will run the linker with the -nodefaultlibs
  1039. dnl option, which will prevent the compiler from linking the sanitizer
  1040. dnl libraries it needs. We need to specify them manually.
  1041. dnl
  1042. dnl What's more, we need to specify them in a linker script rather than
  1043. dnl from build.rs: these options aren't allowed in the cargo:rustc-flags
  1044. dnl variable.
  1045. RUST_LINKER_OPTIONS=""
  1046. if test "x$have_clang" = "xyes"; then
  1047. if test "x$CFLAGS_ASAN" != "x"; then
  1048. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS $CFLAGS_ASAN"
  1049. fi
  1050. if test "x$CFLAGS_UBSAN" != "x"; then
  1051. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS $CFLAGS_UBSAN"
  1052. fi
  1053. else
  1054. if test "x$CFLAGS_ASAN" != "x"; then
  1055. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -lasan"
  1056. fi
  1057. if test "x$CFLAGS_UBSAN" != "x"; then
  1058. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -lubsan"
  1059. fi
  1060. fi
  1061. AC_SUBST(RUST_LINKER_OPTIONS)
  1062. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  1063. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  1064. mulodi_fixes_ftrapv=no
  1065. if test "$have_clang" = "yes"; then
  1066. saved_CFLAGS="$CFLAGS"
  1067. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  1068. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  1069. AC_LINK_IFELSE([
  1070. AC_LANG_SOURCE([[
  1071. #include <stdint.h>
  1072. #include <stdlib.h>
  1073. int main(int argc, char **argv)
  1074. {
  1075. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1076. * (int64_t)atoi(argv[3]);
  1077. return x == 9;
  1078. } ]])],
  1079. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  1080. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  1081. if test "$ftrapv_can_link" = "no"; then
  1082. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  1083. AC_LINK_IFELSE([
  1084. AC_LANG_SOURCE([[
  1085. #include <stdint.h>
  1086. #include <stdlib.h>
  1087. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  1088. *overflow=0;
  1089. return a;
  1090. }
  1091. int main(int argc, char **argv)
  1092. {
  1093. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1094. * (int64_t)atoi(argv[3]);
  1095. return x == 9;
  1096. } ]])],
  1097. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  1098. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  1099. fi
  1100. CFLAGS="$saved_CFLAGS"
  1101. fi
  1102. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  1103. dnl These cflags add bunches of branches, and we haven't been able to
  1104. dnl persuade ourselves that they're suitable for code that needs to be
  1105. dnl constant time.
  1106. AC_SUBST(CFLAGS_BUGTRAP)
  1107. dnl These cflags are variant ones sutable for code that needs to be
  1108. dnl constant-time.
  1109. AC_SUBST(CFLAGS_CONSTTIME)
  1110. if test "x$enable_linker_hardening" != "xno"; then
  1111. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  1112. fi
  1113. # For backtrace support
  1114. TOR_CHECK_LDFLAGS(-rdynamic)
  1115. dnl ------------------------------------------------------
  1116. dnl Now see if we have a -fomit-frame-pointer compiler option.
  1117. saved_CFLAGS="$CFLAGS"
  1118. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  1119. F_OMIT_FRAME_POINTER=''
  1120. if test "$saved_CFLAGS" != "$CFLAGS"; then
  1121. if test "$fragile_hardening" = "yes"; then
  1122. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  1123. fi
  1124. fi
  1125. CFLAGS="$saved_CFLAGS"
  1126. AC_SUBST(F_OMIT_FRAME_POINTER)
  1127. dnl ------------------------------------------------------
  1128. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  1129. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  1130. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  1131. dnl code will work.
  1132. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  1133. dnl ============================================================
  1134. dnl Check for libseccomp
  1135. if test "x$enable_seccomp" != "xno"; then
  1136. AC_CHECK_HEADERS([seccomp.h])
  1137. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  1138. fi
  1139. dnl ============================================================
  1140. dnl Check for libscrypt
  1141. if test "x$enable_libscrypt" != "xno"; then
  1142. AC_CHECK_HEADERS([libscrypt.h])
  1143. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  1144. AC_CHECK_FUNCS([libscrypt_scrypt])
  1145. fi
  1146. dnl ============================================================
  1147. dnl We need an implementation of curve25519.
  1148. dnl set these defaults.
  1149. build_curve25519_donna=no
  1150. build_curve25519_donna_c64=no
  1151. use_curve25519_donna=no
  1152. use_curve25519_nacl=no
  1153. CURVE25519_LIBS=
  1154. dnl The best choice is using curve25519-donna-c64, but that requires
  1155. dnl that we
  1156. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  1157. tor_cv_can_use_curve25519_donna_c64,
  1158. [AC_RUN_IFELSE(
  1159. [AC_LANG_PROGRAM([dnl
  1160. #include <stdint.h>
  1161. typedef unsigned uint128_t __attribute__((mode(TI)));
  1162. int func(uint64_t a, uint64_t b) {
  1163. uint128_t c = ((uint128_t)a) * b;
  1164. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1165. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1166. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1167. (((uint64_t)(c))&0xffffffffL) == 0;
  1168. return ok;
  1169. }
  1170. ], [dnl
  1171. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1172. ((uint64_t)1234567890) << 24);
  1173. return !ok;
  1174. ])],
  1175. [tor_cv_can_use_curve25519_donna_c64=yes],
  1176. [tor_cv_can_use_curve25519_donna_c64=no],
  1177. [AC_LINK_IFELSE(
  1178. [AC_LANG_PROGRAM([dnl
  1179. #include <stdint.h>
  1180. typedef unsigned uint128_t __attribute__((mode(TI)));
  1181. int func(uint64_t a, uint64_t b) {
  1182. uint128_t c = ((uint128_t)a) * b;
  1183. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1184. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1185. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1186. (((uint64_t)(c))&0xffffffffL) == 0;
  1187. return ok;
  1188. }
  1189. ], [dnl
  1190. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1191. ((uint64_t)1234567890) << 24);
  1192. return !ok;
  1193. ])],
  1194. [tor_cv_can_use_curve25519_donna_c64=cross],
  1195. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1196. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1197. nacl/crypto_scalarmult_curve25519.h])
  1198. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1199. tor_cv_can_use_curve25519_nacl,
  1200. [tor_saved_LIBS="$LIBS"
  1201. LIBS="$LIBS -lnacl"
  1202. AC_LINK_IFELSE(
  1203. [AC_LANG_PROGRAM([dnl
  1204. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1205. #include <crypto_scalarmult_curve25519.h>
  1206. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1207. #include <nacl/crypto_scalarmult_curve25519.h>
  1208. #endif
  1209. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1210. #error Hey, this is the reference implementation! That's not fast.
  1211. #endif
  1212. ], [
  1213. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1214. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1215. [tor_cv_can_use_curve25519_nacl=no])
  1216. LIBS="$tor_saved_LIBS" ])
  1217. dnl Okay, now we need to figure out which one to actually use. Fall back
  1218. dnl to curve25519-donna.c
  1219. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1220. build_curve25519_donna_c64=yes
  1221. use_curve25519_donna=yes
  1222. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1223. use_curve25519_nacl=yes
  1224. CURVE25519_LIBS=-lnacl
  1225. else
  1226. build_curve25519_donna=yes
  1227. use_curve25519_donna=yes
  1228. fi
  1229. if test "x$use_curve25519_donna" = "xyes"; then
  1230. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1231. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1232. fi
  1233. if test "x$use_curve25519_nacl" = "xyes"; then
  1234. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1235. [Defined if we should use a curve25519 from nacl])
  1236. fi
  1237. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1238. test "x$build_curve25519_donna" = "xyes")
  1239. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1240. test "x$build_curve25519_donna_c64" = "xyes")
  1241. AC_SUBST(CURVE25519_LIBS)
  1242. dnl Make sure to enable support for large off_t if available.
  1243. AC_SYS_LARGEFILE
  1244. AC_CHECK_HEADERS([errno.h \
  1245. fcntl.h \
  1246. signal.h \
  1247. string.h \
  1248. sys/capability.h \
  1249. sys/fcntl.h \
  1250. sys/stat.h \
  1251. sys/time.h \
  1252. sys/types.h \
  1253. time.h \
  1254. unistd.h \
  1255. arpa/inet.h \
  1256. crt_externs.h \
  1257. execinfo.h \
  1258. gnu/libc-version.h \
  1259. grp.h \
  1260. ifaddrs.h \
  1261. inttypes.h \
  1262. limits.h \
  1263. linux/types.h \
  1264. machine/limits.h \
  1265. malloc.h \
  1266. malloc/malloc.h \
  1267. malloc_np.h \
  1268. netdb.h \
  1269. netinet/in.h \
  1270. netinet/in6.h \
  1271. pwd.h \
  1272. readpassphrase.h \
  1273. stdatomic.h \
  1274. sys/eventfd.h \
  1275. sys/file.h \
  1276. sys/ioctl.h \
  1277. sys/limits.h \
  1278. sys/mman.h \
  1279. sys/param.h \
  1280. sys/prctl.h \
  1281. sys/random.h \
  1282. sys/resource.h \
  1283. sys/select.h \
  1284. sys/socket.h \
  1285. sys/statvfs.h \
  1286. sys/syscall.h \
  1287. sys/sysctl.h \
  1288. sys/syslimits.h \
  1289. sys/time.h \
  1290. sys/types.h \
  1291. sys/un.h \
  1292. sys/utime.h \
  1293. sys/wait.h \
  1294. syslog.h \
  1295. utime.h])
  1296. AC_CHECK_HEADERS(sys/param.h)
  1297. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1298. [#ifdef HAVE_SYS_TYPES_H
  1299. #include <sys/types.h>
  1300. #endif
  1301. #ifdef HAVE_SYS_SOCKET_H
  1302. #include <sys/socket.h>
  1303. #endif])
  1304. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1305. [#ifdef HAVE_SYS_TYPES_H
  1306. #include <sys/types.h>
  1307. #endif
  1308. #ifdef HAVE_SYS_SOCKET_H
  1309. #include <sys/socket.h>
  1310. #endif
  1311. #ifdef HAVE_NET_IF_H
  1312. #include <net/if.h>
  1313. #endif
  1314. #ifdef HAVE_NETINET_IN_H
  1315. #include <netinet/in.h>
  1316. #endif])
  1317. AC_CHECK_HEADERS(linux/if.h,[],[],
  1318. [
  1319. #ifdef HAVE_SYS_SOCKET_H
  1320. #include <sys/socket.h>
  1321. #endif
  1322. ])
  1323. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1324. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1325. [#ifdef HAVE_SYS_TYPES_H
  1326. #include <sys/types.h>
  1327. #endif
  1328. #ifdef HAVE_SYS_SOCKET_H
  1329. #include <sys/socket.h>
  1330. #endif
  1331. #ifdef HAVE_LIMITS_H
  1332. #include <limits.h>
  1333. #endif
  1334. #ifdef HAVE_LINUX_TYPES_H
  1335. #include <linux/types.h>
  1336. #endif
  1337. #ifdef HAVE_NETINET_IN6_H
  1338. #include <netinet/in6.h>
  1339. #endif
  1340. #ifdef HAVE_NETINET_IN_H
  1341. #include <netinet/in.h>
  1342. #endif])
  1343. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1344. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1345. [#ifdef HAVE_SYS_TYPES_H
  1346. #include <sys/types.h>
  1347. #endif
  1348. #ifdef HAVE_SYS_SOCKET_H
  1349. #include <sys/socket.h>
  1350. #endif
  1351. #ifdef HAVE_LIMITS_H
  1352. #include <limits.h>
  1353. #endif
  1354. #ifdef HAVE_LINUX_TYPES_H
  1355. #include <linux/types.h>
  1356. #endif
  1357. #ifdef HAVE_NETINET_IN6_H
  1358. #include <netinet/in6.h>
  1359. #endif
  1360. #ifdef HAVE_NETINET_IN_H
  1361. #include <netinet/in.h>
  1362. #endif
  1363. #ifdef HAVE_LINUX_IF_H
  1364. #include <linux/if.h>
  1365. #endif])
  1366. transparent_ok=0
  1367. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1368. transparent_ok=1
  1369. fi
  1370. if test "x$linux_netfilter_ipv4" = "x1"; then
  1371. transparent_ok=1
  1372. fi
  1373. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1374. transparent_ok=1
  1375. fi
  1376. if test "x$transparent_ok" = "x1"; then
  1377. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1378. else
  1379. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1380. fi
  1381. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1382. [#ifdef HAVE_SYS_TYPES_H
  1383. #include <sys/types.h>
  1384. #endif
  1385. #ifdef HAVE_SYS_TIME_H
  1386. #include <sys/time.h>
  1387. #endif])
  1388. AC_CHECK_SIZEOF(char)
  1389. AC_CHECK_SIZEOF(short)
  1390. AC_CHECK_SIZEOF(int)
  1391. AC_CHECK_SIZEOF(long)
  1392. AC_CHECK_SIZEOF(long long)
  1393. AC_CHECK_SIZEOF(__int64)
  1394. AC_CHECK_SIZEOF(void *)
  1395. AC_CHECK_SIZEOF(time_t)
  1396. AC_CHECK_SIZEOF(size_t)
  1397. AC_CHECK_SIZEOF(pid_t)
  1398. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1399. AC_PC_FROM_UCONTEXT([:])
  1400. dnl used to include sockaddr_storage, but everybody has that.
  1401. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1402. [#ifdef HAVE_SYS_TYPES_H
  1403. #include <sys/types.h>
  1404. #endif
  1405. #ifdef HAVE_NETINET_IN_H
  1406. #include <netinet/in.h>
  1407. #endif
  1408. #ifdef HAVE_NETINET_IN6_H
  1409. #include <netinet/in6.h>
  1410. #endif
  1411. #ifdef HAVE_SYS_SOCKET_H
  1412. #include <sys/socket.h>
  1413. #endif
  1414. #ifdef _WIN32
  1415. #define _WIN32_WINNT 0x0501
  1416. #define WIN32_LEAN_AND_MEAN
  1417. #include <winsock2.h>
  1418. #include <ws2tcpip.h>
  1419. #endif
  1420. ])
  1421. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1422. [#ifdef HAVE_SYS_TYPES_H
  1423. #include <sys/types.h>
  1424. #endif
  1425. #ifdef HAVE_NETINET_IN_H
  1426. #include <netinet/in.h>
  1427. #endif
  1428. #ifdef HAVE_NETINET_IN6_H
  1429. #include <netinet/in6.h>
  1430. #endif
  1431. #ifdef HAVE_SYS_SOCKET_H
  1432. #include <sys/socket.h>
  1433. #endif
  1434. #ifdef _WIN32
  1435. #define _WIN32_WINNT 0x0501
  1436. #define WIN32_LEAN_AND_MEAN
  1437. #include <winsock2.h>
  1438. #include <ws2tcpip.h>
  1439. #endif
  1440. ])
  1441. AC_CHECK_TYPES([rlim_t], , ,
  1442. [#ifdef HAVE_SYS_TYPES_H
  1443. #include <sys/types.h>
  1444. #endif
  1445. #ifdef HAVE_SYS_TIME_H
  1446. #include <sys/time.h>
  1447. #endif
  1448. #ifdef HAVE_SYS_RESOURCE_H
  1449. #include <sys/resource.h>
  1450. #endif
  1451. ])
  1452. AX_CHECK_SIGN([time_t],
  1453. [ : ],
  1454. [ : ], [
  1455. #ifdef HAVE_SYS_TYPES_H
  1456. #include <sys/types.h>
  1457. #endif
  1458. #ifdef HAVE_SYS_TIME_H
  1459. #include <sys/time.h>
  1460. #endif
  1461. #ifdef HAVE_TIME_H
  1462. #include <time.h>
  1463. #endif
  1464. ])
  1465. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1466. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1467. fi
  1468. AX_CHECK_SIGN([size_t],
  1469. [ tor_cv_size_t_signed=yes ],
  1470. [ tor_cv_size_t_signed=no ], [
  1471. #ifdef HAVE_SYS_TYPES_H
  1472. #include <sys/types.h>
  1473. #endif
  1474. ])
  1475. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1476. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1477. fi
  1478. AX_CHECK_SIGN([enum always],
  1479. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1480. [ : ], [
  1481. enum always { AAA, BBB, CCC };
  1482. ])
  1483. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1484. #ifdef HAVE_SYS_SOCKET_H
  1485. #include <sys/socket.h>
  1486. #endif
  1487. ])
  1488. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1489. AC_CHECK_SIZEOF(cell_t)
  1490. # Now make sure that NULL can be represented as zero bytes.
  1491. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1492. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1493. [[#include <stdlib.h>
  1494. #include <string.h>
  1495. #include <stdio.h>
  1496. #ifdef HAVE_STDDEF_H
  1497. #include <stddef.h>
  1498. #endif
  1499. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1500. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1501. [tor_cv_null_is_zero=yes],
  1502. [tor_cv_null_is_zero=no],
  1503. [tor_cv_null_is_zero=cross])])
  1504. if test "$tor_cv_null_is_zero" = "cross"; then
  1505. # Cross-compiling; let's hope that the target isn't raving mad.
  1506. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1507. fi
  1508. if test "$tor_cv_null_is_zero" != "no"; then
  1509. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1510. [Define to 1 iff memset(0) sets pointers to NULL])
  1511. fi
  1512. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1513. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1514. [[#include <stdlib.h>
  1515. #include <string.h>
  1516. #include <stdio.h>
  1517. #ifdef HAVE_STDDEF_H
  1518. #include <stddef.h>
  1519. #endif
  1520. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1521. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1522. [tor_cv_dbl0_is_zero=yes],
  1523. [tor_cv_dbl0_is_zero=no],
  1524. [tor_cv_dbl0_is_zero=cross])])
  1525. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1526. # Cross-compiling; let's hope that the target isn't raving mad.
  1527. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1528. fi
  1529. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1530. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1531. [Define to 1 iff memset(0) sets doubles to 0.0])
  1532. fi
  1533. # And what happens when we malloc zero?
  1534. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1535. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1536. [[#include <stdlib.h>
  1537. #include <string.h>
  1538. #include <stdio.h>
  1539. #ifdef HAVE_STDDEF_H
  1540. #include <stddef.h>
  1541. #endif
  1542. int main () { return malloc(0)?0:1; }]])],
  1543. [tor_cv_malloc_zero_works=yes],
  1544. [tor_cv_malloc_zero_works=no],
  1545. [tor_cv_malloc_zero_works=cross])])
  1546. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1547. # Cross-compiling; let's hope that the target isn't raving mad.
  1548. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1549. fi
  1550. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1551. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1552. [Define to 1 iff malloc(0) returns a pointer])
  1553. fi
  1554. # whether we seem to be in a 2s-complement world.
  1555. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1556. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1557. [[int main () { int problem = ((-99) != (~99)+1);
  1558. return problem ? 1 : 0; }]])],
  1559. [tor_cv_twos_complement=yes],
  1560. [tor_cv_twos_complement=no],
  1561. [tor_cv_twos_complement=cross])])
  1562. if test "$tor_cv_twos_complement" = "cross"; then
  1563. # Cross-compiling; let's hope that the target isn't raving mad.
  1564. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1565. fi
  1566. if test "$tor_cv_twos_complement" != "no"; then
  1567. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1568. [Define to 1 iff we represent negative integers with
  1569. two's complement])
  1570. fi
  1571. # What does shifting a negative value do?
  1572. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1573. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1574. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1575. [tor_cv_sign_extend=yes],
  1576. [tor_cv_sign_extend=no],
  1577. [tor_cv_sign_extend=cross])])
  1578. if test "$tor_cv_sign_extend" = "cross"; then
  1579. # Cross-compiling; let's hope that the target isn't raving mad.
  1580. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1581. fi
  1582. if test "$tor_cv_sign_extend" != "no"; then
  1583. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1584. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1585. fi
  1586. # Is uint8_t the same type as unsigned char?
  1587. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1588. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1589. #include <stdint.h>
  1590. extern uint8_t c;
  1591. unsigned char c;]])],
  1592. [tor_cv_uint8_uchar=yes],
  1593. [tor_cv_uint8_uchar=no],
  1594. [tor_cv_uint8_uchar=cross])])
  1595. if test "$tor_cv_uint8_uchar" = "cross"; then
  1596. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1597. fi
  1598. if test "$tor_cv_uint8_uchar" = "no"; then
  1599. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1600. fi
  1601. AC_ARG_WITH(tcmalloc,
  1602. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1603. [ tcmalloc=yes ], [ tcmalloc=no ])
  1604. if test "x$tcmalloc" = "xyes"; then
  1605. LDFLAGS="-ltcmalloc $LDFLAGS"
  1606. fi
  1607. using_custom_malloc=no
  1608. if test "x$enable_openbsd_malloc" = "xyes"; then
  1609. using_custom_malloc=yes
  1610. fi
  1611. if test "x$tcmalloc" = "xyes"; then
  1612. using_custom_malloc=yes
  1613. fi
  1614. if test "$using_custom_malloc" = "no"; then
  1615. AC_CHECK_FUNCS(mallinfo)
  1616. fi
  1617. # By default, we're going to assume we don't have mlockall()
  1618. # bionic and other platforms have various broken mlockall subsystems.
  1619. # Some systems don't have a working mlockall, some aren't linkable,
  1620. # and some have it but don't declare it.
  1621. AC_CHECK_FUNCS(mlockall)
  1622. AC_CHECK_DECLS([mlockall], , , [
  1623. #ifdef HAVE_SYS_MMAN_H
  1624. #include <sys/mman.h>
  1625. #endif])
  1626. # Allow user to specify an alternate syslog facility
  1627. AC_ARG_WITH(syslog-facility,
  1628. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1629. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1630. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1631. AC_SUBST(LOGFACILITY)
  1632. # Check if we have getresuid and getresgid
  1633. AC_CHECK_FUNCS(getresuid getresgid)
  1634. # Check for gethostbyname_r in all its glorious incompatible versions.
  1635. # (This logic is based on that in Python's configure.in)
  1636. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1637. [Define this if you have any gethostbyname_r()])
  1638. AC_CHECK_FUNC(gethostbyname_r, [
  1639. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1640. OLD_CFLAGS=$CFLAGS
  1641. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1642. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1643. #include <netdb.h>
  1644. ]], [[
  1645. char *cp1, *cp2;
  1646. struct hostent *h1, *h2;
  1647. int i1, i2;
  1648. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1649. ]])],[
  1650. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1651. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1652. [Define this if gethostbyname_r takes 6 arguments])
  1653. AC_MSG_RESULT(6)
  1654. ], [
  1655. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1656. #include <netdb.h>
  1657. ]], [[
  1658. char *cp1, *cp2;
  1659. struct hostent *h1;
  1660. int i1, i2;
  1661. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1662. ]])], [
  1663. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1664. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1665. [Define this if gethostbyname_r takes 5 arguments])
  1666. AC_MSG_RESULT(5)
  1667. ], [
  1668. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1669. #include <netdb.h>
  1670. ]], [[
  1671. char *cp1;
  1672. struct hostent *h1;
  1673. struct hostent_data hd;
  1674. (void) gethostbyname_r(cp1,h1,&hd);
  1675. ]])], [
  1676. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1677. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1678. [Define this if gethostbyname_r takes 3 arguments])
  1679. AC_MSG_RESULT(3)
  1680. ], [
  1681. AC_MSG_RESULT(0)
  1682. ])
  1683. ])
  1684. ])
  1685. CFLAGS=$OLD_CFLAGS
  1686. ])
  1687. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1688. tor_cv_have_func_macro,
  1689. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1690. #include <stdio.h>
  1691. int main(int c, char **v) { puts(__func__); }])],
  1692. tor_cv_have_func_macro=yes,
  1693. tor_cv_have_func_macro=no))
  1694. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1695. tor_cv_have_FUNC_macro,
  1696. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1697. #include <stdio.h>
  1698. int main(int c, char **v) { puts(__FUNC__); }])],
  1699. tor_cv_have_FUNC_macro=yes,
  1700. tor_cv_have_FUNC_macro=no))
  1701. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1702. tor_cv_have_FUNCTION_macro,
  1703. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1704. #include <stdio.h>
  1705. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1706. tor_cv_have_FUNCTION_macro=yes,
  1707. tor_cv_have_FUNCTION_macro=no))
  1708. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1709. tor_cv_have_environ_declared,
  1710. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1711. #ifdef HAVE_UNISTD_H
  1712. #include <unistd.h>
  1713. #endif
  1714. #include <stdlib.h>
  1715. int main(int c, char **v) { char **t = environ; }])],
  1716. tor_cv_have_environ_declared=yes,
  1717. tor_cv_have_environ_declared=no))
  1718. if test "$tor_cv_have_func_macro" = "yes"; then
  1719. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1720. fi
  1721. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1722. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1723. fi
  1724. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1725. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1726. [Defined if the compiler supports __FUNCTION__])
  1727. fi
  1728. if test "$tor_cv_have_environ_declared" = "yes"; then
  1729. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1730. [Defined if we have extern char **environ already declared])
  1731. fi
  1732. # $prefix stores the value of the --prefix command line option, or
  1733. # NONE if the option wasn't set. In the case that it wasn't set, make
  1734. # it be the default, so that we can use it to expand directories now.
  1735. if test "x$prefix" = "xNONE"; then
  1736. prefix=$ac_default_prefix
  1737. fi
  1738. # and similarly for $exec_prefix
  1739. if test "x$exec_prefix" = "xNONE"; then
  1740. exec_prefix=$prefix
  1741. fi
  1742. if test "x$BUILDDIR" = "x"; then
  1743. BUILDDIR=`pwd`
  1744. fi
  1745. AC_SUBST(BUILDDIR)
  1746. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1747. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1748. if test "x$SRCDIR" = "x"; then
  1749. SRCDIR=$(cd "$srcdir"; pwd)
  1750. fi
  1751. AH_TEMPLATE([SRCDIR],[tor's sourcedir directory])
  1752. AC_DEFINE_UNQUOTED(SRCDIR,"$SRCDIR")
  1753. if test "x$CONFDIR" = "x"; then
  1754. CONFDIR=`eval echo $sysconfdir/tor`
  1755. fi
  1756. AC_SUBST(CONFDIR)
  1757. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1758. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1759. BINDIR=`eval echo $bindir`
  1760. AC_SUBST(BINDIR)
  1761. LOCALSTATEDIR=`eval echo $localstatedir`
  1762. AC_SUBST(LOCALSTATEDIR)
  1763. if test "$bwin32" = "true"; then
  1764. # Test if the linker supports the --nxcompat and --dynamicbase options
  1765. # for Windows
  1766. save_LDFLAGS="$LDFLAGS"
  1767. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1768. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1769. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1770. [AC_MSG_RESULT([yes])]
  1771. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1772. [AC_MSG_RESULT([no])]
  1773. )
  1774. LDFLAGS="$save_LDFLAGS"
  1775. fi
  1776. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1777. # than autoconf's macros like.
  1778. if test "$GCC" = "yes"; then
  1779. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1780. # accident waiting to happen.
  1781. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1782. else
  1783. # Override optimization level for non-gcc compilers
  1784. CFLAGS="$CFLAGS -O"
  1785. enable_gcc_warnings=no
  1786. enable_gcc_warnings_advisory=no
  1787. fi
  1788. # Warnings implies advisory-warnings and -Werror.
  1789. if test "$enable_gcc_warnings" = "yes"; then
  1790. enable_gcc_warnings_advisory=yes
  1791. enable_fatal_warnings=yes
  1792. fi
  1793. # OS X Lion started deprecating the system openssl. Let's just disable
  1794. # all deprecation warnings on OS X. Also, to potentially make the binary
  1795. # a little smaller, let's enable dead_strip.
  1796. case "$host_os" in
  1797. darwin*)
  1798. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1799. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1800. esac
  1801. # Add some more warnings which we use in development but not in the
  1802. # released versions. (Some relevant gcc versions can't handle these.)
  1803. #
  1804. # Note that we have to do this near the end of the autoconf process, or
  1805. # else we may run into problems when these warnings hit on the testing C
  1806. # programs that autoconf wants to build.
  1807. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1808. case "$host" in
  1809. *-*-openbsd* | *-*-bitrig*)
  1810. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1811. # That's fine, except that the headers don't pass -Wredundant-decls.
  1812. # Therefore, let's disable -Wsystem-headers when we're building
  1813. # with maximal warnings on OpenBSD.
  1814. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1815. esac
  1816. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1817. # have it work better.
  1818. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1819. # This warning was added in gcc 4.3, but it appears to generate
  1820. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1821. #CFLAGS="$CFLAGS -Wlogical-op"
  1822. m4_foreach_w([warning_flag], [
  1823. -Waddress
  1824. -Waddress-of-array-temporary
  1825. -Waddress-of-temporary
  1826. -Wambiguous-macro
  1827. -Wanonymous-pack-parens
  1828. -Warc
  1829. -Warc-abi
  1830. -Warc-bridge-casts-disallowed-in-nonarc
  1831. -Warc-maybe-repeated-use-of-weak
  1832. -Warc-performSelector-leaks
  1833. -Warc-repeated-use-of-weak
  1834. -Warray-bounds
  1835. -Warray-bounds-pointer-arithmetic
  1836. -Wasm
  1837. -Wasm-operand-widths
  1838. -Watomic-properties
  1839. -Watomic-property-with-user-defined-accessor
  1840. -Wauto-import
  1841. -Wauto-storage-class
  1842. -Wauto-var-id
  1843. -Wavailability
  1844. -Wbackslash-newline-escape
  1845. -Wbad-array-new-length
  1846. -Wbind-to-temporary-copy
  1847. -Wbitfield-constant-conversion
  1848. -Wbool-conversion
  1849. -Wbool-conversions
  1850. -Wbuiltin-requires-header
  1851. -Wchar-align
  1852. -Wcompare-distinct-pointer-types
  1853. -Wcomplex-component-init
  1854. -Wconditional-type-mismatch
  1855. -Wconfig-macros
  1856. -Wconstant-conversion
  1857. -Wconstant-logical-operand
  1858. -Wconstexpr-not-const
  1859. -Wcustom-atomic-properties
  1860. -Wdangling-field
  1861. -Wdangling-initializer-list
  1862. -Wdate-time
  1863. -Wdelegating-ctor-cycles
  1864. -Wdeprecated-implementations
  1865. -Wdeprecated-register
  1866. -Wdirect-ivar-access
  1867. -Wdiscard-qual
  1868. -Wdistributed-object-modifiers
  1869. -Wdivision-by-zero
  1870. -Wdollar-in-identifier-extension
  1871. -Wdouble-promotion
  1872. -Wduplicate-decl-specifier
  1873. -Wduplicate-enum
  1874. -Wduplicate-method-arg
  1875. -Wduplicate-method-match
  1876. -Wduplicated-cond
  1877. -Wdynamic-class-memaccess
  1878. -Wembedded-directive
  1879. -Wempty-translation-unit
  1880. -Wenum-conversion
  1881. -Wexit-time-destructors
  1882. -Wexplicit-ownership-type
  1883. -Wextern-initializer
  1884. -Wextra
  1885. -Wextra-semi
  1886. -Wextra-tokens
  1887. -Wflexible-array-extensions
  1888. -Wfloat-conversion
  1889. -Wformat-non-iso
  1890. -Wfour-char-constants
  1891. -Wgcc-compat
  1892. -Wglobal-constructors
  1893. -Wgnu-array-member-paren-init
  1894. -Wgnu-designator
  1895. -Wgnu-static-float-init
  1896. -Wheader-guard
  1897. -Wheader-hygiene
  1898. -Widiomatic-parentheses
  1899. -Wignored-attributes
  1900. -Wimplicit-atomic-properties
  1901. -Wimplicit-conversion-floating-point-to-bool
  1902. -Wimplicit-exception-spec-mismatch
  1903. -Wimplicit-fallthrough
  1904. -Wimplicit-fallthrough-per-function
  1905. -Wimplicit-retain-self
  1906. -Wimport-preprocessor-directive-pedantic
  1907. -Wincompatible-library-redeclaration
  1908. -Wincompatible-pointer-types-discards-qualifiers
  1909. -Wincomplete-implementation
  1910. -Wincomplete-module
  1911. -Wincomplete-umbrella
  1912. -Winit-self
  1913. -Wint-conversions
  1914. -Wint-to-void-pointer-cast
  1915. -Winteger-overflow
  1916. -Winvalid-constexpr
  1917. -Winvalid-iboutlet
  1918. -Winvalid-noreturn
  1919. -Winvalid-pp-token
  1920. -Winvalid-source-encoding
  1921. -Winvalid-token-paste
  1922. -Wknr-promoted-parameter
  1923. -Wlarge-by-value-copy
  1924. -Wliteral-conversion
  1925. -Wliteral-range
  1926. -Wlocal-type-template-args
  1927. -Wlogical-op
  1928. -Wloop-analysis
  1929. -Wmain-return-type
  1930. -Wmalformed-warning-check
  1931. -Wmethod-signatures
  1932. -Wmicrosoft
  1933. -Wmicrosoft-exists
  1934. -Wmismatched-parameter-types
  1935. -Wmismatched-return-types
  1936. -Wmissing-field-initializers
  1937. -Wmissing-format-attribute
  1938. -Wmissing-noreturn
  1939. -Wmissing-selector-name
  1940. -Wmissing-sysroot
  1941. -Wmissing-variable-declarations
  1942. -Wmodule-conflict
  1943. -Wnested-anon-types
  1944. -Wnewline-eof
  1945. -Wnon-literal-null-conversion
  1946. -Wnon-pod-varargs
  1947. -Wnonportable-cfstrings
  1948. -Wnormalized=nfkc
  1949. -Wnull-arithmetic
  1950. -Wnull-character
  1951. -Wnull-conversion
  1952. -Wnull-dereference
  1953. -Wout-of-line-declaration
  1954. -Wover-aligned
  1955. -Woverlength-strings
  1956. -Woverride-init
  1957. -Woverriding-method-mismatch
  1958. -Wpointer-type-mismatch
  1959. -Wpredefined-identifier-outside-function
  1960. -Wprotocol-property-synthesis-ambiguity
  1961. -Wreadonly-iboutlet-property
  1962. -Wreadonly-setter-attrs
  1963. -Wreceiver-expr
  1964. -Wreceiver-forward-class
  1965. -Wreceiver-is-weak
  1966. -Wreinterpret-base-class
  1967. -Wrequires-super-attribute
  1968. -Wreserved-user-defined-literal
  1969. -Wreturn-stack-address
  1970. -Wsection
  1971. -Wselector-type-mismatch
  1972. -Wsentinel
  1973. -Wserialized-diagnostics
  1974. -Wshadow
  1975. -Wshift-count-negative
  1976. -Wshift-count-overflow
  1977. -Wshift-negative-value
  1978. -Wshift-overflow=2
  1979. -Wshift-sign-overflow
  1980. -Wshorten-64-to-32
  1981. -Wsizeof-array-argument
  1982. -Wsource-uses-openmp
  1983. -Wstatic-float-init
  1984. -Wstatic-in-inline
  1985. -Wstatic-local-in-inline
  1986. -Wstrict-overflow=1
  1987. -Wstring-compare
  1988. -Wstring-conversion
  1989. -Wstrlcpy-strlcat-size
  1990. -Wstrncat-size
  1991. -Wsuggest-attribute=format
  1992. -Wsuggest-attribute=noreturn
  1993. -Wsuper-class-method-mismatch
  1994. -Wswitch-bool
  1995. -Wsync-nand
  1996. -Wtautological-constant-out-of-range-compare
  1997. -Wtentative-definition-incomplete-type
  1998. -Wtrampolines
  1999. -Wtype-safety
  2000. -Wtypedef-redefinition
  2001. -Wtypename-missing
  2002. -Wundefined-inline
  2003. -Wundefined-internal
  2004. -Wundefined-reinterpret-cast
  2005. -Wunicode
  2006. -Wunicode-whitespace
  2007. -Wunknown-warning-option
  2008. -Wunnamed-type-template-args
  2009. -Wunneeded-member-function
  2010. -Wunsequenced
  2011. -Wunsupported-visibility
  2012. -Wunused-but-set-parameter
  2013. -Wunused-but-set-variable
  2014. -Wunused-command-line-argument
  2015. -Wunused-const-variable=2
  2016. -Wunused-exception-parameter
  2017. -Wunused-local-typedefs
  2018. -Wunused-member-function
  2019. -Wunused-sanitize-argument
  2020. -Wunused-volatile-lvalue
  2021. -Wuser-defined-literals
  2022. -Wvariadic-macros
  2023. -Wvector-conversion
  2024. -Wvector-conversions
  2025. -Wvexing-parse
  2026. -Wvisibility
  2027. -Wvla-extension
  2028. -Wzero-length-array
  2029. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  2030. dnl We should re-enable this in some later version. Clang doesn't
  2031. dnl mind, but it causes trouble with GCC.
  2032. dnl -Wstrict-overflow=2
  2033. dnl These seem to require annotations that we don't currently use,
  2034. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  2035. dnl -Wthread-safety
  2036. dnl -Wthread-safety-analysis
  2037. dnl -Wthread-safety-attributes
  2038. dnl -Wthread-safety-beta
  2039. dnl -Wthread-safety-precise
  2040. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  2041. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  2042. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  2043. CFLAGS="$CFLAGS -Wwrite-strings"
  2044. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  2045. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  2046. CFLAGS="$CFLAGS -Wunused-parameter "
  2047. # These interfere with building main() { return 0; }, which autoconf
  2048. # likes to use as its default program.
  2049. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  2050. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  2051. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  2052. fi
  2053. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  2054. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  2055. fi
  2056. if test "$tor_cv_cflags__warn_unused_const_variable_2" = "yes"; then
  2057. AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
  2058. fi
  2059. if test "x$enable_fatal_warnings" = "xyes"; then
  2060. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  2061. # default autoconf programs are full of errors.
  2062. CFLAGS="$CFLAGS -Werror"
  2063. fi
  2064. fi
  2065. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  2066. case "$host_os" in
  2067. darwin*)
  2068. 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.])
  2069. esac
  2070. fi
  2071. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  2072. AC_CONFIG_FILES([
  2073. Doxyfile
  2074. Makefile
  2075. config.rust
  2076. link_rust.sh
  2077. contrib/dist/suse/tor.sh
  2078. contrib/operator-tools/tor.logrotate
  2079. contrib/dist/tor.sh
  2080. contrib/dist/torctl
  2081. contrib/dist/tor.service
  2082. src/config/torrc.sample
  2083. src/config/torrc.minimal
  2084. src/rust/.cargo/config
  2085. scripts/maint/checkOptionDocs.pl
  2086. scripts/maint/updateVersions.pl
  2087. ])
  2088. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  2089. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  2090. for file in $regular_mans ; do
  2091. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  2092. echo "==================================";
  2093. echo;
  2094. echo "Building Tor has failed since manpages cannot be built.";
  2095. echo;
  2096. echo "You need asciidoc installed to be able to build the manpages.";
  2097. echo "To build without manpages, use the --disable-asciidoc argument";
  2098. echo "when calling configure.";
  2099. echo;
  2100. echo "==================================";
  2101. exit 1;
  2102. fi
  2103. done
  2104. fi
  2105. if test "$fragile_hardening" = "yes"; then
  2106. AC_MSG_WARN([
  2107. ============
  2108. Warning! Building Tor with --enable-fragile-hardening (also known as
  2109. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  2110. other kinds of attacks easier. A Tor instance build with this option will be
  2111. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  2112. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  2113. denial of service attacks. For more information, see
  2114. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  2115. ============
  2116. ])
  2117. fi
  2118. AC_OUTPUT