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) 2007-2017, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_PREREQ([2.63])
  6. AC_INIT([tor],[0.3.4.3-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/or/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. if test -f "/etc/redhat-release"; then
  19. if test -f "/usr/kerberos/include"; then
  20. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  21. fi
  22. fi
  23. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  24. # the += operator on it in src/or/Makefile.am
  25. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  28. AC_ARG_ENABLE(static-openssl,
  29. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  30. AC_ARG_ENABLE(static-libevent,
  31. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  32. AC_ARG_ENABLE(static-zlib,
  33. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  34. AC_ARG_ENABLE(static-tor,
  35. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  36. AC_ARG_ENABLE(unittests,
  37. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  38. AC_ARG_ENABLE(coverage,
  39. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  40. AC_ARG_ENABLE(asserts-in-tests,
  41. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  42. AC_ARG_ENABLE(system-torrc,
  43. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  44. AC_ARG_ENABLE(libfuzzer,
  45. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  46. AC_ARG_ENABLE(oss-fuzz,
  47. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  48. AC_ARG_ENABLE(memory-sentinels,
  49. AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
  50. AC_ARG_ENABLE(rust,
  51. AS_HELP_STRING(--enable-rust, [enable rust integration]))
  52. AC_ARG_ENABLE(cargo-online-mode,
  53. AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
  54. AC_ARG_ENABLE(restart-debugging,
  55. AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
  56. AC_ARG_ENABLE(zstd-advanced-apis,
  57. AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
  58. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  59. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  60. fi
  61. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  62. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  63. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  64. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  65. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  66. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  67. if test "$enable_static_tor" = "yes"; then
  68. enable_static_libevent="yes";
  69. enable_static_openssl="yes";
  70. enable_static_zlib="yes";
  71. CFLAGS="$CFLAGS -static"
  72. fi
  73. if test "$enable_system_torrc" = "no"; then
  74. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  75. [Defined if we're not going to look for a torrc in SYSCONF])
  76. fi
  77. if test "$enable_memory_sentinels" = "no"; then
  78. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  79. [Defined if we're turning off memory safety code to look for bugs])
  80. fi
  81. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  82. AC_ARG_ENABLE(asciidoc,
  83. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  84. [case "${enableval}" in
  85. "yes") asciidoc=true ;;
  86. "no") asciidoc=false ;;
  87. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  88. esac], [asciidoc=true])
  89. # systemd notify support
  90. AC_ARG_ENABLE(systemd,
  91. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  92. [case "${enableval}" in
  93. "yes") systemd=true ;;
  94. "no") systemd=false ;;
  95. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  96. esac], [systemd=auto])
  97. if test "$enable_restart_debugging" = "yes"; then
  98. AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
  99. [Defined if we're building with support for in-process restart debugging.])
  100. fi
  101. if test "$enable_zstd_advanced_apis" != "no"; then
  102. AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
  103. [Defined if we're going to try to use zstd's "static-only" APIs.])
  104. fi
  105. # systemd support
  106. if test "x$enable_systemd" = "xno"; then
  107. have_systemd=no;
  108. else
  109. PKG_CHECK_MODULES(SYSTEMD,
  110. [libsystemd-daemon],
  111. have_systemd=yes,
  112. have_systemd=no)
  113. if test "x$have_systemd" = "xno"; then
  114. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  115. PKG_CHECK_MODULES(SYSTEMD,
  116. [libsystemd],
  117. have_systemd=yes,
  118. have_systemd=no)
  119. fi
  120. fi
  121. if test "x$have_systemd" = "xyes"; then
  122. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  123. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  124. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  125. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  126. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  127. fi
  128. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  129. AC_SUBST(TOR_SYSTEMD_LIBS)
  130. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  131. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  132. fi
  133. case "$host" in
  134. *-*-solaris* )
  135. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  136. ;;
  137. esac
  138. AC_ARG_ENABLE(gcc-warnings,
  139. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  140. AC_ARG_ENABLE(fatal-warnings,
  141. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  142. AC_ARG_ENABLE(gcc-warnings-advisory,
  143. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  144. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  145. AC_ARG_ENABLE(gcc-hardening,
  146. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  147. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  148. AC_ARG_ENABLE(expensive-hardening,
  149. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  150. AC_ARG_ENABLE(fragile-hardening,
  151. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  152. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  153. fragile_hardening="yes"
  154. AC_DEFINE(DEBUG_SMARTLIST, 1, [Enable smartlist debugging])
  155. fi
  156. dnl Linker hardening options
  157. dnl Currently these options are ELF specific - you can't use this with MacOSX
  158. AC_ARG_ENABLE(linker-hardening,
  159. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  160. AC_ARG_ENABLE(local-appdata,
  161. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  162. if test "$enable_local_appdata" = "yes"; then
  163. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  164. [Defined if we default to host local appdata paths on Windows])
  165. fi
  166. # Tor2web mode flag
  167. AC_ARG_ENABLE(tor2web-mode,
  168. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  169. [if test "x$enableval" = "xyes"; then
  170. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  171. fi])
  172. AC_ARG_ENABLE(tool-name-check,
  173. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  174. AC_ARG_ENABLE(seccomp,
  175. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  176. AC_ARG_ENABLE(libscrypt,
  177. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  178. dnl Enable event tracing which are transformed to debug log statement.
  179. AC_ARG_ENABLE(event-tracing-debug,
  180. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  181. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  182. if test x$enable_event_tracing_debug = xyes; then
  183. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  184. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  185. fi
  186. dnl Enable Android only features.
  187. AC_ARG_ENABLE(android,
  188. AS_HELP_STRING(--enable-android, [build with Android features enabled]))
  189. AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
  190. if test "x$enable_android" = "xyes"; then
  191. AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
  192. dnl Check if the Android log library is available.
  193. AC_CHECK_HEADERS([android/log.h])
  194. AC_SEARCH_LIBS(__android_log_write, [log])
  195. fi
  196. dnl ---
  197. dnl Tor modules options. These options are namespaced with --disable-module-XXX
  198. dnl ---
  199. dnl All our modules.
  200. m4_define(MODULES, dirauth)
  201. dnl Directory Authority module.
  202. AC_ARG_ENABLE([module-dirauth],
  203. AS_HELP_STRING([--disable-module-dirauth],
  204. [Do not build tor with the dirauth module]),
  205. [], dnl Action if-given
  206. AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
  207. [Compile with Directory Authority feature support]))
  208. AM_CONDITIONAL(BUILD_MODULE_DIRAUTH, [test "x$enable_module_dirauth" != "xno"])
  209. dnl Helper variables.
  210. TOR_MODULES_ALL_ENABLED=
  211. AC_DEFUN([ADD_MODULE], [
  212. MODULE=m4_toupper($1)
  213. TOR_MODULES_ALL_ENABLED="${TOR_MODULES_ALL_ENABLED} -DHAVE_MODULE_${MODULE}=1"
  214. ])
  215. m4_foreach_w([module], MODULES, [ADD_MODULE([module])])
  216. AC_SUBST(TOR_MODULES_ALL_ENABLED)
  217. dnl check for the correct "ar" when cross-compiling.
  218. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  219. dnl so kludge up a replacement for the case where it isn't there yet.)
  220. m4_ifdef([AM_PROG_AR],
  221. [AM_PROG_AR],
  222. [AN_MAKEVAR([AR], [AC_PROG_AR])
  223. AN_PROGRAM([ar], [AC_PROG_AR])
  224. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  225. AC_PROG_AR])
  226. dnl Check whether the above macro has settled for a simply named tool even
  227. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  228. dnl because that will find any cc on the system, not only the cross-compiler,
  229. dnl and then verify that a binary built with this compiler runs on the
  230. dnl build system. It will then come to the false conclusion that we're not
  231. dnl cross-compiling.
  232. if test "x$enable_tool_name_check" != "xno"; then
  233. if test "x$ac_tool_warned" = "xyes"; then
  234. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  235. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  236. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  237. fi
  238. fi
  239. AC_PROG_CC
  240. AC_PROG_CPP
  241. AC_PROG_MAKE_SET
  242. AC_PROG_RANLIB
  243. AC_PROG_SED
  244. AC_ARG_VAR([PERL], [path to Perl binary])
  245. AC_CHECK_PROGS([PERL], [perl])
  246. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  247. dnl check for asciidoc and a2x
  248. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  249. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  250. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  251. AM_PROG_CC_C_O
  252. AC_PROG_CC_C99
  253. AC_ARG_VAR([PYTHON], [path to Python binary])
  254. AC_CHECK_PROGS(PYTHON, [ \
  255. python3 \
  256. python3.8 python3.7 python3.6 python3.5 python3.4 \
  257. python \
  258. python2 python2.7])
  259. if test "x$PYTHON" = "x"; then
  260. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  261. fi
  262. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  263. dnl List all external rust crates we depend on here. Include the version
  264. rust_crates=" \
  265. digest-0.7.2 \
  266. libc-0.2.39 \
  267. "
  268. AC_SUBST(rust_crates)
  269. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  270. AC_C_FLEXIBLE_ARRAY_MEMBER
  271. ], [
  272. dnl Maybe we've got an old autoconf...
  273. AC_CACHE_CHECK([for flexible array members],
  274. tor_cv_c_flexarray,
  275. [AC_COMPILE_IFELSE(
  276. AC_LANG_PROGRAM([
  277. struct abc { int a; char b[]; };
  278. ], [
  279. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  280. def->b[0] = 33;
  281. ]),
  282. [tor_cv_c_flexarray=yes],
  283. [tor_cv_c_flexarray=no])])
  284. if test "$tor_cv_flexarray" = "yes"; then
  285. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  286. else
  287. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  288. fi
  289. ])
  290. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  291. tor_cv_c_c99_decl,
  292. [AC_COMPILE_IFELSE(
  293. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  294. [tor_cv_c_c99_decl=yes],
  295. [tor_cv_c_c99_decl=no] )])
  296. if test "$tor_cv_c_c99_decl" != "yes"; then
  297. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  298. fi
  299. AC_CACHE_CHECK([for working C99 designated initializers],
  300. tor_cv_c_c99_designated_init,
  301. [AC_COMPILE_IFELSE(
  302. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  303. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  304. [tor_cv_c_c99_designated_init=yes],
  305. [tor_cv_c_c99_designated_init=no] )])
  306. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  307. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  308. fi
  309. TORUSER=_tor
  310. AC_ARG_WITH(tor-user,
  311. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  312. [
  313. TORUSER=$withval
  314. ]
  315. )
  316. AC_SUBST(TORUSER)
  317. TORGROUP=_tor
  318. AC_ARG_WITH(tor-group,
  319. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  320. [
  321. TORGROUP=$withval
  322. ]
  323. )
  324. AC_SUBST(TORGROUP)
  325. dnl If _WIN32 is defined and non-zero, we are building for win32
  326. AC_MSG_CHECKING([for win32])
  327. AC_RUN_IFELSE([AC_LANG_SOURCE([
  328. int main(int c, char **v) {
  329. #ifdef _WIN32
  330. #if _WIN32
  331. return 0;
  332. #else
  333. return 1;
  334. #endif
  335. #else
  336. return 2;
  337. #endif
  338. }])],
  339. bwin32=true; AC_MSG_RESULT([yes]),
  340. bwin32=false; AC_MSG_RESULT([no]),
  341. bwin32=cross; AC_MSG_RESULT([cross])
  342. )
  343. if test "$bwin32" = "cross"; then
  344. AC_MSG_CHECKING([for win32 (cross)])
  345. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  346. #ifdef _WIN32
  347. int main(int c, char **v) {return 0;}
  348. #else
  349. #error
  350. int main(int c, char **v) {return x(y);}
  351. #endif
  352. ])],
  353. bwin32=true; AC_MSG_RESULT([yes]),
  354. bwin32=false; AC_MSG_RESULT([no]))
  355. fi
  356. AH_BOTTOM([
  357. #ifdef _WIN32
  358. /* Defined to access windows functions and definitions for >=WinXP */
  359. # ifndef WINVER
  360. # define WINVER 0x0501
  361. # endif
  362. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  363. # ifndef _WIN32_WINNT
  364. # define _WIN32_WINNT 0x0501
  365. # endif
  366. /* Defined to avoid including some windows headers as part of Windows.h */
  367. # ifndef WIN32_LEAN_AND_MEAN
  368. # define WIN32_LEAN_AND_MEAN 1
  369. # endif
  370. #endif
  371. ])
  372. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  373. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  374. dnl Enable C99 when compiling with MIPSpro
  375. AC_MSG_CHECKING([for MIPSpro compiler])
  376. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  377. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  378. #error
  379. return x(y);
  380. #endif
  381. ])],
  382. bmipspro=false; AC_MSG_RESULT(no),
  383. bmipspro=true; AC_MSG_RESULT(yes))
  384. if test "$bmipspro" = "true"; then
  385. CFLAGS="$CFLAGS -c99"
  386. fi
  387. AC_C_BIGENDIAN
  388. if test "x$enable_rust" = "xyes"; then
  389. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  390. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  391. if test "x$RUSTC" = "xno"; then
  392. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  393. fi
  394. AC_ARG_VAR([CARGO], [path to the cargo binary])
  395. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  396. if test "x$CARGO" = "xno"; then
  397. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  398. fi
  399. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  400. if test "x$enable_fatal_warnings" = "xyes"; then
  401. RUST_WARN=
  402. else
  403. RUST_WARN=#
  404. fi
  405. if test "x$enable_cargo_online_mode" = "xyes"; then
  406. CARGO_ONLINE=
  407. RUST_DL=#
  408. else
  409. CARGO_ONLINE=--frozen
  410. RUST_DL=
  411. dnl When we're not allowed to touch the network, we need crate dependencies
  412. dnl locally available.
  413. AC_MSG_CHECKING([rust crate dependencies])
  414. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  415. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  416. TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
  417. fi
  418. dnl Check whether the path exists before we try to cd into it.
  419. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  420. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  421. ERRORED=1
  422. fi
  423. dnl Make the path absolute, since we'll be using it from within a
  424. dnl subdirectory.
  425. TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
  426. for dep in $rust_crates; do
  427. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  428. AC_MSG_ERROR([Failure to find rust dependency $TOR_RUST_DEPENDENCIES/$dep. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  429. ERRORED=1
  430. fi
  431. done
  432. if test "x$ERRORED" = "x"; then
  433. AC_MSG_RESULT([yes])
  434. fi
  435. fi
  436. dnl This is a workaround for #46797
  437. dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ). Once the
  438. dnl upstream bug is fixed, we can remove this workaround.
  439. case "$host_os" in
  440. darwin*)
  441. TOR_RUST_EXTRA_LIBS="-lresolv"
  442. ;;
  443. esac
  444. dnl For now both MSVC and MinGW rust libraries will output static libs with
  445. dnl the MSVC naming convention.
  446. if test "$bwin32" = "true"; then
  447. TOR_RUST_STATIC_NAME=tor_rust.lib
  448. else
  449. TOR_RUST_STATIC_NAME=libtor_rust.a
  450. fi
  451. AC_SUBST(TOR_RUST_STATIC_NAME)
  452. AC_SUBST(CARGO_ONLINE)
  453. AC_SUBST(RUST_WARN)
  454. AC_SUBST(RUST_DL)
  455. dnl Let's check the rustc version, too
  456. AC_MSG_CHECKING([rust version])
  457. RUSTC_VERSION=`$RUSTC --version`
  458. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  459. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  460. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  461. AC_MSG_ERROR([rustc version couldn't be identified])
  462. fi
  463. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  464. AC_MSG_ERROR([rustc must be at least version 1.14])
  465. fi
  466. AC_MSG_RESULT([$RUSTC_VERSION])
  467. fi
  468. AC_SUBST(TOR_RUST_EXTRA_LIBS)
  469. AC_SEARCH_LIBS(socket, [socket network])
  470. AC_SEARCH_LIBS(gethostbyname, [nsl])
  471. AC_SEARCH_LIBS(dlopen, [dl])
  472. AC_SEARCH_LIBS(inet_aton, [resolv])
  473. AC_SEARCH_LIBS(backtrace, [execinfo])
  474. saved_LIBS="$LIBS"
  475. AC_SEARCH_LIBS([clock_gettime], [rt])
  476. if test "$LIBS" != "$saved_LIBS"; then
  477. # Looks like we need -lrt for clock_gettime().
  478. have_rt=yes
  479. fi
  480. AC_SEARCH_LIBS(pthread_create, [pthread])
  481. AC_SEARCH_LIBS(pthread_detach, [pthread])
  482. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  483. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  484. AC_CHECK_FUNCS(
  485. _NSGetEnviron \
  486. RtlSecureZeroMemory \
  487. SecureZeroMemory \
  488. accept4 \
  489. backtrace \
  490. backtrace_symbols_fd \
  491. eventfd \
  492. explicit_bzero \
  493. timingsafe_memcmp \
  494. flock \
  495. ftime \
  496. get_current_dir_name \
  497. getaddrinfo \
  498. getifaddrs \
  499. getpass \
  500. getrlimit \
  501. gettimeofday \
  502. gmtime_r \
  503. gnu_get_libc_version \
  504. htonll \
  505. inet_aton \
  506. ioctl \
  507. issetugid \
  508. llround \
  509. localtime_r \
  510. lround \
  511. mach_approximate_time \
  512. memmem \
  513. memset_s \
  514. mmap \
  515. pipe \
  516. pipe2 \
  517. prctl \
  518. readpassphrase \
  519. rint \
  520. sigaction \
  521. socketpair \
  522. statvfs \
  523. strlcat \
  524. strlcpy \
  525. strnlen \
  526. strptime \
  527. strtok_r \
  528. strtoull \
  529. sysconf \
  530. sysctl \
  531. truncate \
  532. uname \
  533. usleep \
  534. vasprintf \
  535. _vscprintf
  536. )
  537. # Apple messed up when they added two functions functions in Sierra: they
  538. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  539. # checks. So we should only probe for those functions if we are sure that we
  540. # are not targeting OSX 10.11 or earlier.
  541. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  542. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  543. #ifdef __APPLE__
  544. # include <AvailabilityMacros.h>
  545. # ifndef MAC_OS_X_VERSION_10_12
  546. # define MAC_OS_X_VERSION_10_12 101200
  547. # endif
  548. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  549. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  550. # error "Running on Mac OSX 10.11 or earlier"
  551. # endif
  552. # endif
  553. #endif
  554. ]], [[]])],
  555. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  556. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  557. if test "$on_macos_pre_10_12" = "no"; then
  558. AC_CHECK_FUNCS(
  559. clock_gettime \
  560. getentropy \
  561. )
  562. fi
  563. if test "$bwin32" != "true"; then
  564. AC_CHECK_HEADERS(pthread.h)
  565. AC_CHECK_FUNCS(pthread_create)
  566. AC_CHECK_FUNCS(pthread_condattr_setclock)
  567. fi
  568. if test "$bwin32" = "true"; then
  569. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  570. #include <windows.h>
  571. #include <conio.h>
  572. #include <wchar.h>
  573. ])
  574. fi
  575. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  576. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  577. AC_MSG_CHECKING([whether free(NULL) works])
  578. AC_RUN_IFELSE([AC_LANG_PROGRAM([
  579. #include <stdlib.h>
  580. ], [
  581. char *p = NULL;
  582. free(p);
  583. ])],
  584. [free_null_ok=true; AC_MSG_RESULT(yes)],
  585. [free_null_ok=false; AC_MSG_RESULT(no)],
  586. [free_null_ok=cross; AC_MSG_RESULT(cross)])
  587. if test "$free_null_ok" = "false"; then
  588. AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
  589. fi
  590. dnl ------------------------------------------------------
  591. dnl Where do you live, libevent? And how do we call you?
  592. if test "$bwin32" = "true"; then
  593. TOR_LIB_WS32=-lws2_32
  594. TOR_LIB_IPHLPAPI=-liphlpapi
  595. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  596. # think it's actually necessary.
  597. TOR_LIB_GDI=-lgdi32
  598. TOR_LIB_USERENV=-luserenv
  599. else
  600. TOR_LIB_WS32=
  601. TOR_LIB_GDI=
  602. TOR_LIB_USERENV=
  603. fi
  604. AC_SUBST(TOR_LIB_WS32)
  605. AC_SUBST(TOR_LIB_GDI)
  606. AC_SUBST(TOR_LIB_IPHLPAPI)
  607. AC_SUBST(TOR_LIB_USERENV)
  608. tor_libevent_pkg_redhat="libevent"
  609. tor_libevent_pkg_debian="libevent-dev"
  610. tor_libevent_devpkg_redhat="libevent-devel"
  611. tor_libevent_devpkg_debian="libevent-dev"
  612. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  613. dnl linking for static builds.
  614. STATIC_LIBEVENT_FLAGS=""
  615. if test "$enable_static_libevent" = "yes"; then
  616. if test "$have_rt" = "yes"; then
  617. STATIC_LIBEVENT_FLAGS=" -lrt "
  618. fi
  619. fi
  620. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  621. #ifdef _WIN32
  622. #include <winsock2.h>
  623. #endif
  624. #include <sys/time.h>
  625. #include <sys/types.h>
  626. #include <event2/event.h>], [
  627. #ifdef _WIN32
  628. #include <winsock2.h>
  629. #endif
  630. struct event_base;
  631. struct event_base *event_base_new(void);
  632. void event_base_free(struct event_base *);],
  633. [
  634. #ifdef _WIN32
  635. {WSADATA d; WSAStartup(0x101,&d); }
  636. #endif
  637. event_base_free(event_base_new());
  638. ], [--with-libevent-dir], [/opt/libevent])
  639. dnl Determine the incantation needed to link libevent.
  640. save_LIBS="$LIBS"
  641. save_LDFLAGS="$LDFLAGS"
  642. save_CPPFLAGS="$CPPFLAGS"
  643. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  644. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  645. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  646. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  647. if test "$enable_static_libevent" = "yes"; then
  648. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  649. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  650. else
  651. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  652. fi
  653. else
  654. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  655. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  656. 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"))
  657. if test "$ac_cv_search_event_new" != "none required"; then
  658. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  659. fi
  660. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  661. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  662. fi
  663. else
  664. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  665. fi
  666. fi
  667. dnl Now check for particular libevent functions.
  668. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  669. evutil_secure_rng_add_bytes \
  670. ])
  671. LIBS="$save_LIBS"
  672. LDFLAGS="$save_LDFLAGS"
  673. CPPFLAGS="$save_CPPFLAGS"
  674. dnl Check that libevent is at least at version 2.0.10, the first stable
  675. dnl release of its series
  676. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  677. AC_MSG_CHECKING([whether Libevent is new enough])
  678. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  679. #include <event2/event.h>
  680. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  681. #error
  682. int x = y(zz);
  683. #else
  684. int x = 1;
  685. #endif
  686. ])], [ AC_MSG_RESULT([yes]) ],
  687. [ AC_MSG_RESULT([no])
  688. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  689. LIBS="$save_LIBS"
  690. LDFLAGS="$save_LDFLAGS"
  691. CPPFLAGS="$save_CPPFLAGS"
  692. AC_SUBST(TOR_LIBEVENT_LIBS)
  693. dnl ------------------------------------------------------
  694. dnl Where do you live, libm?
  695. dnl On some platforms (Haiku/BeOS) the math library is
  696. dnl part of libroot. In which case don't link against lm
  697. TOR_LIB_MATH=""
  698. save_LIBS="$LIBS"
  699. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  700. if test "$ac_cv_search_pow" != "none required"; then
  701. TOR_LIB_MATH="$ac_cv_search_pow"
  702. fi
  703. LIBS="$save_LIBS"
  704. AC_SUBST(TOR_LIB_MATH)
  705. dnl ------------------------------------------------------
  706. dnl Where do you live, openssl? And how do we call you?
  707. tor_openssl_pkg_redhat="openssl"
  708. tor_openssl_pkg_debian="libssl-dev"
  709. tor_openssl_devpkg_redhat="openssl-devel"
  710. tor_openssl_devpkg_debian="libssl-dev"
  711. ALT_openssl_WITHVAL=""
  712. AC_ARG_WITH(ssl-dir,
  713. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  714. [
  715. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  716. ALT_openssl_WITHVAL="$withval"
  717. fi
  718. ])
  719. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  720. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  721. [#include <openssl/ssl.h>
  722. char *getenv(const char *);],
  723. [struct ssl_cipher_st;
  724. unsigned SSL_CIPHER_get_id(const struct ssl_cipher_st *);
  725. char *getenv(const char *);],
  726. dnl This funny-looking test program calls getenv, so that the compiler
  727. dnl will neither make code that call SSL_CIPHER_get_id(NULL) [producing
  728. dnl a crash], nor optimize out the call to SSL_CIPHER_get_id().
  729. dnl We look for SSL_cipher_get_id() because it is present in
  730. dnl OpenSSL >=1.0.1, because it is not deprecated, and because Tor
  731. dnl depends on it.
  732. [if (getenv("THIS_SHOULDNT_BE_SET_X201803")) SSL_CIPHER_get_id((void *)0);], [],
  733. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  734. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  735. if test "$enable_static_openssl" = "yes"; then
  736. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  737. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  738. else
  739. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  740. fi
  741. else
  742. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  743. fi
  744. AC_SUBST(TOR_OPENSSL_LIBS)
  745. dnl Now check for particular openssl functions.
  746. save_LIBS="$LIBS"
  747. save_LDFLAGS="$LDFLAGS"
  748. save_CPPFLAGS="$CPPFLAGS"
  749. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  750. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  751. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  752. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  753. #include <openssl/opensslv.h>
  754. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  755. #error "too old"
  756. #endif
  757. ]], [[]])],
  758. [ : ],
  759. [ 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.]) ])
  760. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  761. #include <openssl/opensslv.h>
  762. #include <openssl/evp.h>
  763. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  764. #error "no ECC"
  765. #endif
  766. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  767. #error "curves unavailable"
  768. #endif
  769. ]], [[]])],
  770. [ : ],
  771. [ 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.]) ])
  772. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  773. [#include <openssl/ssl.h>
  774. ])
  775. AC_CHECK_FUNCS([ \
  776. SSL_SESSION_get_master_key \
  777. SSL_get_server_random \
  778. SSL_get_client_ciphers \
  779. SSL_get_client_random \
  780. SSL_CIPHER_find \
  781. TLS_method
  782. ])
  783. dnl Check if OpenSSL has scrypt implementation.
  784. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  785. dnl Check if OpenSSL structures are opaque
  786. AC_CHECK_MEMBERS([SSL.state], , ,
  787. [#include <openssl/ssl.h>
  788. ])
  789. AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
  790. #include <openssl/sha.h>
  791. ])
  792. dnl Define the set of checks for KIST scheduler support.
  793. AC_DEFUN([CHECK_KIST_SUPPORT],[
  794. dnl KIST needs struct tcp_info and for certain members to exist.
  795. AC_CHECK_MEMBERS(
  796. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  797. , ,[[#include <netinet/tcp.h>]])
  798. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  799. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  800. #include <linux/sockios.h>
  801. #ifndef SIOCOUTQNSD
  802. #error
  803. #endif
  804. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  805. if test "x$have_siocoutqnsd" = "xyes"; then
  806. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  807. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  808. have_kist_support=yes
  809. fi
  810. fi
  811. fi
  812. ])
  813. dnl Now, trigger the check.
  814. CHECK_KIST_SUPPORT
  815. AS_IF([test "x$have_kist_support" = "xyes"],
  816. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  817. on this system])],
  818. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  819. LIBS="$save_LIBS"
  820. LDFLAGS="$save_LDFLAGS"
  821. CPPFLAGS="$save_CPPFLAGS"
  822. dnl ------------------------------------------------------
  823. dnl Where do you live, zlib? And how do we call you?
  824. tor_zlib_pkg_redhat="zlib"
  825. tor_zlib_pkg_debian="zlib1g"
  826. tor_zlib_devpkg_redhat="zlib-devel"
  827. tor_zlib_devpkg_debian="zlib1g-dev"
  828. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  829. [#include <zlib.h>],
  830. [const char * zlibVersion(void);],
  831. [zlibVersion();], [--with-zlib-dir],
  832. [/opt/zlib])
  833. if test "$enable_static_zlib" = "yes"; then
  834. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  835. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  836. using --enable-static-zlib")
  837. else
  838. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  839. fi
  840. else
  841. TOR_ZLIB_LIBS="-lz"
  842. fi
  843. AC_SUBST(TOR_ZLIB_LIBS)
  844. dnl ------------------------------------------------------
  845. dnl Where we do we find lzma?
  846. AC_ARG_ENABLE(lzma,
  847. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  848. [case "${enableval}" in
  849. "yes") lzma=true ;;
  850. "no") lzma=false ;;
  851. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  852. esac], [lzma=auto])
  853. if test "x$enable_lzma" = "xno"; then
  854. have_lzma=no;
  855. else
  856. PKG_CHECK_MODULES([LZMA],
  857. [liblzma],
  858. have_lzma=yes,
  859. have_lzma=no)
  860. if test "x$have_lzma" = "xno" ; then
  861. AC_MSG_WARN([Unable to find liblzma.])
  862. fi
  863. fi
  864. if test "x$have_lzma" = "xyes"; then
  865. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  866. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  867. TOR_LZMA_LIBS="${LZMA_LIBS}"
  868. fi
  869. AC_SUBST(TOR_LZMA_CFLAGS)
  870. AC_SUBST(TOR_LZMA_LIBS)
  871. dnl ------------------------------------------------------
  872. dnl Where we do we find zstd?
  873. AC_ARG_ENABLE(zstd,
  874. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  875. [case "${enableval}" in
  876. "yes") zstd=true ;;
  877. "no") zstd=false ;;
  878. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  879. esac], [zstd=auto])
  880. if test "x$enable_zstd" = "xno"; then
  881. have_zstd=no;
  882. else
  883. PKG_CHECK_MODULES([ZSTD],
  884. [libzstd >= 1.1],
  885. have_zstd=yes,
  886. have_zstd=no)
  887. if test "x$have_zstd" = "xno" ; then
  888. AC_MSG_WARN([Unable to find libzstd.])
  889. fi
  890. fi
  891. if test "x$have_zstd" = "xyes"; then
  892. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  893. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  894. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  895. dnl now check for zstd functions
  896. save_LIBS="$LIBS"
  897. save_CFLAGS="$CFLAGS"
  898. LIBS="$LIBS $ZSTD_LIBS"
  899. CFLAGS="$CFLAGS $ZSTD_CFLAGS"
  900. AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
  901. ZSTD_estimateDCtxSize)
  902. LIBS="$save_LIBS"
  903. CFLAGS="$save_CFLAGS"
  904. fi
  905. AC_SUBST(TOR_ZSTD_CFLAGS)
  906. AC_SUBST(TOR_ZSTD_LIBS)
  907. dnl ----------------------------------------------------------------------
  908. dnl Check if libcap is available for capabilities.
  909. tor_cap_pkg_debian="libcap2"
  910. tor_cap_pkg_redhat="libcap"
  911. tor_cap_devpkg_debian="libcap-dev"
  912. tor_cap_devpkg_redhat="libcap-devel"
  913. AC_CHECK_LIB([cap], [cap_init], [],
  914. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  915. )
  916. AC_CHECK_FUNCS(cap_set_proc)
  917. dnl ---------------------------------------------------------------------
  918. dnl Now that we know about our major libraries, we can check for compiler
  919. dnl and linker hardening options. We need to do this with the libraries known,
  920. dnl since sometimes the linker will like an option but not be willing to
  921. dnl use it with a build of a library.
  922. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  923. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  924. CFLAGS_FTRAPV=
  925. CFLAGS_FWRAPV=
  926. CFLAGS_ASAN=
  927. CFLAGS_UBSAN=
  928. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  929. #if !defined(__clang__)
  930. #error
  931. #endif])], have_clang=yes, have_clang=no)
  932. if test "x$enable_gcc_hardening" != "xno"; then
  933. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  934. if test "x$have_clang" = "xyes"; then
  935. TOR_CHECK_CFLAGS(-Qunused-arguments)
  936. fi
  937. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  938. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  939. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  940. m4_ifdef([AS_VAR_IF],[
  941. AS_VAR_IF(can_compile, [yes],
  942. AS_VAR_IF(can_link, [yes],
  943. [],
  944. 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.)]))
  945. )])
  946. AS_VAR_POPDEF([can_link])
  947. AS_VAR_POPDEF([can_compile])
  948. TOR_CHECK_CFLAGS(-Wstack-protector)
  949. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  950. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  951. TOR_CHECK_CFLAGS(-fPIE)
  952. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  953. fi
  954. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  955. fi
  956. if test "$fragile_hardening" = "yes"; then
  957. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  958. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  959. 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.])
  960. fi
  961. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  962. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  963. fi
  964. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  965. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  966. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  967. fi
  968. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  969. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  970. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  971. fi
  972. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  973. fi
  974. dnl Find the correct libraries to add in order to use the sanitizers.
  975. dnl
  976. dnl When building Rust, Cargo will run the linker with the -nodefaultlibs
  977. dnl option, which will prevent the compiler from linking the sanitizer
  978. dnl libraries it needs. We need to specify them manually.
  979. dnl
  980. dnl What's more, we need to specify them in a linker script rather than
  981. dnl from build.rs: these options aren't allowed in the cargo:rustc-flags
  982. dnl variable.
  983. RUST_LINKER_OPTIONS=""
  984. if test "x$have_clang" = "xyes"; then
  985. if test "x$CFLAGS_ASAN" != "x"; then
  986. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS $CFLAGS_ASAN"
  987. fi
  988. if test "x$CFLAGS_UBSAN" != "x"; then
  989. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS $CFLAGS_UBSAN"
  990. fi
  991. else
  992. if test "x$CFLAGS_ASAN" != "x"; then
  993. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -lasan"
  994. fi
  995. if test "x$CFLAGS_UBSAN" != "x"; then
  996. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -lubsan"
  997. fi
  998. fi
  999. AC_SUBST(RUST_LINKER_OPTIONS)
  1000. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  1001. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  1002. mulodi_fixes_ftrapv=no
  1003. if test "$have_clang" = "yes"; then
  1004. saved_CFLAGS="$CFLAGS"
  1005. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  1006. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  1007. AC_LINK_IFELSE([
  1008. AC_LANG_SOURCE([[
  1009. #include <stdint.h>
  1010. #include <stdlib.h>
  1011. int main(int argc, char **argv)
  1012. {
  1013. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1014. * (int64_t)atoi(argv[3]);
  1015. return x == 9;
  1016. } ]])],
  1017. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  1018. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  1019. if test "$ftrapv_can_link" = "no"; then
  1020. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  1021. AC_LINK_IFELSE([
  1022. AC_LANG_SOURCE([[
  1023. #include <stdint.h>
  1024. #include <stdlib.h>
  1025. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  1026. *overflow=0;
  1027. return a;
  1028. }
  1029. int main(int argc, char **argv)
  1030. {
  1031. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1032. * (int64_t)atoi(argv[3]);
  1033. return x == 9;
  1034. } ]])],
  1035. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  1036. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  1037. fi
  1038. CFLAGS="$saved_CFLAGS"
  1039. fi
  1040. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  1041. dnl These cflags add bunches of branches, and we haven't been able to
  1042. dnl persuade ourselves that they're suitable for code that needs to be
  1043. dnl constant time.
  1044. AC_SUBST(CFLAGS_BUGTRAP)
  1045. dnl These cflags are variant ones sutable for code that needs to be
  1046. dnl constant-time.
  1047. AC_SUBST(CFLAGS_CONSTTIME)
  1048. if test "x$enable_linker_hardening" != "xno"; then
  1049. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  1050. fi
  1051. # For backtrace support
  1052. TOR_CHECK_LDFLAGS(-rdynamic)
  1053. dnl ------------------------------------------------------
  1054. dnl Now see if we have a -fomit-frame-pointer compiler option.
  1055. saved_CFLAGS="$CFLAGS"
  1056. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  1057. F_OMIT_FRAME_POINTER=''
  1058. if test "$saved_CFLAGS" != "$CFLAGS"; then
  1059. if test "$fragile_hardening" = "yes"; then
  1060. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  1061. fi
  1062. fi
  1063. CFLAGS="$saved_CFLAGS"
  1064. AC_SUBST(F_OMIT_FRAME_POINTER)
  1065. dnl ------------------------------------------------------
  1066. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  1067. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  1068. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  1069. dnl code will work.
  1070. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  1071. dnl ============================================================
  1072. dnl Check for libseccomp
  1073. if test "x$enable_seccomp" != "xno"; then
  1074. AC_CHECK_HEADERS([seccomp.h])
  1075. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  1076. fi
  1077. dnl ============================================================
  1078. dnl Check for libscrypt
  1079. if test "x$enable_libscrypt" != "xno"; then
  1080. AC_CHECK_HEADERS([libscrypt.h])
  1081. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  1082. AC_CHECK_FUNCS([libscrypt_scrypt])
  1083. fi
  1084. dnl ============================================================
  1085. dnl We need an implementation of curve25519.
  1086. dnl set these defaults.
  1087. build_curve25519_donna=no
  1088. build_curve25519_donna_c64=no
  1089. use_curve25519_donna=no
  1090. use_curve25519_nacl=no
  1091. CURVE25519_LIBS=
  1092. dnl The best choice is using curve25519-donna-c64, but that requires
  1093. dnl that we
  1094. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  1095. tor_cv_can_use_curve25519_donna_c64,
  1096. [AC_RUN_IFELSE(
  1097. [AC_LANG_PROGRAM([dnl
  1098. #include <stdint.h>
  1099. typedef unsigned uint128_t __attribute__((mode(TI)));
  1100. int func(uint64_t a, uint64_t b) {
  1101. uint128_t c = ((uint128_t)a) * b;
  1102. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1103. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1104. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1105. (((uint64_t)(c))&0xffffffffL) == 0;
  1106. return ok;
  1107. }
  1108. ], [dnl
  1109. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1110. ((uint64_t)1234567890) << 24);
  1111. return !ok;
  1112. ])],
  1113. [tor_cv_can_use_curve25519_donna_c64=yes],
  1114. [tor_cv_can_use_curve25519_donna_c64=no],
  1115. [AC_LINK_IFELSE(
  1116. [AC_LANG_PROGRAM([dnl
  1117. #include <stdint.h>
  1118. typedef unsigned uint128_t __attribute__((mode(TI)));
  1119. int func(uint64_t a, uint64_t b) {
  1120. uint128_t c = ((uint128_t)a) * b;
  1121. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1122. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1123. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1124. (((uint64_t)(c))&0xffffffffL) == 0;
  1125. return ok;
  1126. }
  1127. ], [dnl
  1128. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1129. ((uint64_t)1234567890) << 24);
  1130. return !ok;
  1131. ])],
  1132. [tor_cv_can_use_curve25519_donna_c64=cross],
  1133. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1134. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1135. nacl/crypto_scalarmult_curve25519.h])
  1136. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1137. tor_cv_can_use_curve25519_nacl,
  1138. [tor_saved_LIBS="$LIBS"
  1139. LIBS="$LIBS -lnacl"
  1140. AC_LINK_IFELSE(
  1141. [AC_LANG_PROGRAM([dnl
  1142. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1143. #include <crypto_scalarmult_curve25519.h>
  1144. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1145. #include <nacl/crypto_scalarmult_curve25519.h>
  1146. #endif
  1147. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1148. #error Hey, this is the reference implementation! That's not fast.
  1149. #endif
  1150. ], [
  1151. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1152. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1153. [tor_cv_can_use_curve25519_nacl=no])
  1154. LIBS="$tor_saved_LIBS" ])
  1155. dnl Okay, now we need to figure out which one to actually use. Fall back
  1156. dnl to curve25519-donna.c
  1157. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1158. build_curve25519_donna_c64=yes
  1159. use_curve25519_donna=yes
  1160. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1161. use_curve25519_nacl=yes
  1162. CURVE25519_LIBS=-lnacl
  1163. else
  1164. build_curve25519_donna=yes
  1165. use_curve25519_donna=yes
  1166. fi
  1167. if test "x$use_curve25519_donna" = "xyes"; then
  1168. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1169. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1170. fi
  1171. if test "x$use_curve25519_nacl" = "xyes"; then
  1172. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1173. [Defined if we should use a curve25519 from nacl])
  1174. fi
  1175. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1176. test "x$build_curve25519_donna" = "xyes")
  1177. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1178. test "x$build_curve25519_donna_c64" = "xyes")
  1179. AC_SUBST(CURVE25519_LIBS)
  1180. dnl Make sure to enable support for large off_t if available.
  1181. AC_SYS_LARGEFILE
  1182. AC_CHECK_HEADERS([assert.h \
  1183. errno.h \
  1184. fcntl.h \
  1185. signal.h \
  1186. string.h \
  1187. sys/capability.h \
  1188. sys/fcntl.h \
  1189. sys/stat.h \
  1190. sys/time.h \
  1191. sys/types.h \
  1192. time.h \
  1193. unistd.h \
  1194. arpa/inet.h \
  1195. crt_externs.h \
  1196. execinfo.h \
  1197. gnu/libc-version.h \
  1198. grp.h \
  1199. ifaddrs.h \
  1200. inttypes.h \
  1201. limits.h \
  1202. linux/types.h \
  1203. machine/limits.h \
  1204. malloc.h \
  1205. malloc/malloc.h \
  1206. malloc_np.h \
  1207. netdb.h \
  1208. netinet/in.h \
  1209. netinet/in6.h \
  1210. pwd.h \
  1211. readpassphrase.h \
  1212. stdint.h \
  1213. stdatomic.h \
  1214. sys/eventfd.h \
  1215. sys/file.h \
  1216. sys/ioctl.h \
  1217. sys/limits.h \
  1218. sys/mman.h \
  1219. sys/param.h \
  1220. sys/prctl.h \
  1221. sys/random.h \
  1222. sys/resource.h \
  1223. sys/select.h \
  1224. sys/socket.h \
  1225. sys/statvfs.h \
  1226. sys/syscall.h \
  1227. sys/sysctl.h \
  1228. sys/syslimits.h \
  1229. sys/time.h \
  1230. sys/types.h \
  1231. sys/un.h \
  1232. sys/utime.h \
  1233. sys/wait.h \
  1234. syslog.h \
  1235. utime.h])
  1236. AC_CHECK_HEADERS(sys/param.h)
  1237. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1238. [#ifdef HAVE_SYS_TYPES_H
  1239. #include <sys/types.h>
  1240. #endif
  1241. #ifdef HAVE_SYS_SOCKET_H
  1242. #include <sys/socket.h>
  1243. #endif])
  1244. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1245. [#ifdef HAVE_SYS_TYPES_H
  1246. #include <sys/types.h>
  1247. #endif
  1248. #ifdef HAVE_SYS_SOCKET_H
  1249. #include <sys/socket.h>
  1250. #endif
  1251. #ifdef HAVE_NET_IF_H
  1252. #include <net/if.h>
  1253. #endif
  1254. #ifdef HAVE_NETINET_IN_H
  1255. #include <netinet/in.h>
  1256. #endif])
  1257. AC_CHECK_HEADERS(linux/if.h,[],[],
  1258. [
  1259. #ifdef HAVE_SYS_SOCKET_H
  1260. #include <sys/socket.h>
  1261. #endif
  1262. ])
  1263. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1264. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1265. [#ifdef HAVE_SYS_TYPES_H
  1266. #include <sys/types.h>
  1267. #endif
  1268. #ifdef HAVE_SYS_SOCKET_H
  1269. #include <sys/socket.h>
  1270. #endif
  1271. #ifdef HAVE_LIMITS_H
  1272. #include <limits.h>
  1273. #endif
  1274. #ifdef HAVE_LINUX_TYPES_H
  1275. #include <linux/types.h>
  1276. #endif
  1277. #ifdef HAVE_NETINET_IN6_H
  1278. #include <netinet/in6.h>
  1279. #endif
  1280. #ifdef HAVE_NETINET_IN_H
  1281. #include <netinet/in.h>
  1282. #endif])
  1283. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1284. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1285. [#ifdef HAVE_SYS_TYPES_H
  1286. #include <sys/types.h>
  1287. #endif
  1288. #ifdef HAVE_SYS_SOCKET_H
  1289. #include <sys/socket.h>
  1290. #endif
  1291. #ifdef HAVE_LIMITS_H
  1292. #include <limits.h>
  1293. #endif
  1294. #ifdef HAVE_LINUX_TYPES_H
  1295. #include <linux/types.h>
  1296. #endif
  1297. #ifdef HAVE_NETINET_IN6_H
  1298. #include <netinet/in6.h>
  1299. #endif
  1300. #ifdef HAVE_NETINET_IN_H
  1301. #include <netinet/in.h>
  1302. #endif
  1303. #ifdef HAVE_LINUX_IF_H
  1304. #include <linux/if.h>
  1305. #endif])
  1306. transparent_ok=0
  1307. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1308. transparent_ok=1
  1309. fi
  1310. if test "x$linux_netfilter_ipv4" = "x1"; then
  1311. transparent_ok=1
  1312. fi
  1313. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1314. transparent_ok=1
  1315. fi
  1316. if test "x$transparent_ok" = "x1"; then
  1317. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1318. else
  1319. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1320. fi
  1321. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1322. [#ifdef HAVE_SYS_TYPES_H
  1323. #include <sys/types.h>
  1324. #endif
  1325. #ifdef HAVE_SYS_TIME_H
  1326. #include <sys/time.h>
  1327. #endif])
  1328. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1329. dnl Watch out.
  1330. AC_CHECK_SIZEOF(int8_t)
  1331. AC_CHECK_SIZEOF(int16_t)
  1332. AC_CHECK_SIZEOF(int32_t)
  1333. AC_CHECK_SIZEOF(int64_t)
  1334. AC_CHECK_SIZEOF(uint8_t)
  1335. AC_CHECK_SIZEOF(uint16_t)
  1336. AC_CHECK_SIZEOF(uint32_t)
  1337. AC_CHECK_SIZEOF(uint64_t)
  1338. AC_CHECK_SIZEOF(intptr_t)
  1339. AC_CHECK_SIZEOF(uintptr_t)
  1340. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1341. AC_CHECK_SIZEOF(char)
  1342. AC_CHECK_SIZEOF(short)
  1343. AC_CHECK_SIZEOF(int)
  1344. AC_CHECK_SIZEOF(long)
  1345. AC_CHECK_SIZEOF(long long)
  1346. AC_CHECK_SIZEOF(__int64)
  1347. AC_CHECK_SIZEOF(void *)
  1348. AC_CHECK_SIZEOF(time_t)
  1349. AC_CHECK_SIZEOF(size_t)
  1350. AC_CHECK_SIZEOF(pid_t)
  1351. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1352. AC_PC_FROM_UCONTEXT([:])
  1353. dnl used to include sockaddr_storage, but everybody has that.
  1354. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1355. [#ifdef HAVE_SYS_TYPES_H
  1356. #include <sys/types.h>
  1357. #endif
  1358. #ifdef HAVE_NETINET_IN_H
  1359. #include <netinet/in.h>
  1360. #endif
  1361. #ifdef HAVE_NETINET_IN6_H
  1362. #include <netinet/in6.h>
  1363. #endif
  1364. #ifdef HAVE_SYS_SOCKET_H
  1365. #include <sys/socket.h>
  1366. #endif
  1367. #ifdef _WIN32
  1368. #define _WIN32_WINNT 0x0501
  1369. #define WIN32_LEAN_AND_MEAN
  1370. #include <winsock2.h>
  1371. #include <ws2tcpip.h>
  1372. #endif
  1373. ])
  1374. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1375. [#ifdef HAVE_SYS_TYPES_H
  1376. #include <sys/types.h>
  1377. #endif
  1378. #ifdef HAVE_NETINET_IN_H
  1379. #include <netinet/in.h>
  1380. #endif
  1381. #ifdef HAVE_NETINET_IN6_H
  1382. #include <netinet/in6.h>
  1383. #endif
  1384. #ifdef HAVE_SYS_SOCKET_H
  1385. #include <sys/socket.h>
  1386. #endif
  1387. #ifdef _WIN32
  1388. #define _WIN32_WINNT 0x0501
  1389. #define WIN32_LEAN_AND_MEAN
  1390. #include <winsock2.h>
  1391. #include <ws2tcpip.h>
  1392. #endif
  1393. ])
  1394. AC_CHECK_TYPES([rlim_t], , ,
  1395. [#ifdef HAVE_SYS_TYPES_H
  1396. #include <sys/types.h>
  1397. #endif
  1398. #ifdef HAVE_SYS_TIME_H
  1399. #include <sys/time.h>
  1400. #endif
  1401. #ifdef HAVE_SYS_RESOURCE_H
  1402. #include <sys/resource.h>
  1403. #endif
  1404. ])
  1405. AX_CHECK_SIGN([time_t],
  1406. [ : ],
  1407. [ : ], [
  1408. #ifdef HAVE_SYS_TYPES_H
  1409. #include <sys/types.h>
  1410. #endif
  1411. #ifdef HAVE_SYS_TIME_H
  1412. #include <sys/time.h>
  1413. #endif
  1414. #ifdef HAVE_TIME_H
  1415. #include <time.h>
  1416. #endif
  1417. ])
  1418. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1419. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1420. fi
  1421. AX_CHECK_SIGN([size_t],
  1422. [ tor_cv_size_t_signed=yes ],
  1423. [ tor_cv_size_t_signed=no ], [
  1424. #ifdef HAVE_SYS_TYPES_H
  1425. #include <sys/types.h>
  1426. #endif
  1427. ])
  1428. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1429. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1430. fi
  1431. AX_CHECK_SIGN([enum always],
  1432. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1433. [ : ], [
  1434. enum always { AAA, BBB, CCC };
  1435. ])
  1436. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1437. #ifdef HAVE_SYS_SOCKET_H
  1438. #include <sys/socket.h>
  1439. #endif
  1440. ])
  1441. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1442. AC_CHECK_SIZEOF(cell_t)
  1443. # Now make sure that NULL can be represented as zero bytes.
  1444. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1445. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1446. [[#include <stdlib.h>
  1447. #include <string.h>
  1448. #include <stdio.h>
  1449. #ifdef HAVE_STDDEF_H
  1450. #include <stddef.h>
  1451. #endif
  1452. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1453. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1454. [tor_cv_null_is_zero=yes],
  1455. [tor_cv_null_is_zero=no],
  1456. [tor_cv_null_is_zero=cross])])
  1457. if test "$tor_cv_null_is_zero" = "cross"; then
  1458. # Cross-compiling; let's hope that the target isn't raving mad.
  1459. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1460. fi
  1461. if test "$tor_cv_null_is_zero" != "no"; then
  1462. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1463. [Define to 1 iff memset(0) sets pointers to NULL])
  1464. fi
  1465. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1466. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1467. [[#include <stdlib.h>
  1468. #include <string.h>
  1469. #include <stdio.h>
  1470. #ifdef HAVE_STDDEF_H
  1471. #include <stddef.h>
  1472. #endif
  1473. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1474. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1475. [tor_cv_dbl0_is_zero=yes],
  1476. [tor_cv_dbl0_is_zero=no],
  1477. [tor_cv_dbl0_is_zero=cross])])
  1478. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1479. # Cross-compiling; let's hope that the target isn't raving mad.
  1480. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1481. fi
  1482. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1483. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1484. [Define to 1 iff memset(0) sets doubles to 0.0])
  1485. fi
  1486. # And what happens when we malloc zero?
  1487. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1488. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1489. [[#include <stdlib.h>
  1490. #include <string.h>
  1491. #include <stdio.h>
  1492. #ifdef HAVE_STDDEF_H
  1493. #include <stddef.h>
  1494. #endif
  1495. int main () { return malloc(0)?0:1; }]])],
  1496. [tor_cv_malloc_zero_works=yes],
  1497. [tor_cv_malloc_zero_works=no],
  1498. [tor_cv_malloc_zero_works=cross])])
  1499. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1500. # Cross-compiling; let's hope that the target isn't raving mad.
  1501. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1502. fi
  1503. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1504. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1505. [Define to 1 iff malloc(0) returns a pointer])
  1506. fi
  1507. # whether we seem to be in a 2s-complement world.
  1508. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1509. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1510. [[int main () { int problem = ((-99) != (~99)+1);
  1511. return problem ? 1 : 0; }]])],
  1512. [tor_cv_twos_complement=yes],
  1513. [tor_cv_twos_complement=no],
  1514. [tor_cv_twos_complement=cross])])
  1515. if test "$tor_cv_twos_complement" = "cross"; then
  1516. # Cross-compiling; let's hope that the target isn't raving mad.
  1517. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1518. fi
  1519. if test "$tor_cv_twos_complement" != "no"; then
  1520. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1521. [Define to 1 iff we represent negative integers with
  1522. two's complement])
  1523. fi
  1524. # What does shifting a negative value do?
  1525. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1526. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1527. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1528. [tor_cv_sign_extend=yes],
  1529. [tor_cv_sign_extend=no],
  1530. [tor_cv_sign_extend=cross])])
  1531. if test "$tor_cv_sign_extend" = "cross"; then
  1532. # Cross-compiling; let's hope that the target isn't raving mad.
  1533. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1534. fi
  1535. if test "$tor_cv_sign_extend" != "no"; then
  1536. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1537. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1538. fi
  1539. # Is uint8_t the same type as unsigned char?
  1540. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1541. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1542. #include <stdint.h>
  1543. extern uint8_t c;
  1544. unsigned char c;]])],
  1545. [tor_cv_uint8_uchar=yes],
  1546. [tor_cv_uint8_uchar=no],
  1547. [tor_cv_uint8_uchar=cross])])
  1548. if test "$tor_cv_uint8_uchar" = "cross"; then
  1549. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1550. fi
  1551. if test "$tor_cv_uint8_uchar" = "no"; then
  1552. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1553. fi
  1554. # Whether we should use the dmalloc memory allocation debugging library.
  1555. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1556. AC_ARG_WITH(dmalloc,
  1557. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1558. [if [[ "$withval" = "yes" ]]; then
  1559. dmalloc=1
  1560. AC_MSG_RESULT(yes)
  1561. else
  1562. dmalloc=1
  1563. AC_MSG_RESULT(no)
  1564. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1565. )
  1566. if [[ $dmalloc -eq 1 ]]; then
  1567. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1568. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1569. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1570. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1571. fi
  1572. AC_ARG_WITH(tcmalloc,
  1573. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1574. [ tcmalloc=yes ], [ tcmalloc=no ])
  1575. if test "x$tcmalloc" = "xyes"; then
  1576. LDFLAGS="-ltcmalloc $LDFLAGS"
  1577. fi
  1578. using_custom_malloc=no
  1579. if test "x$enable_openbsd_malloc" = "xyes"; then
  1580. using_custom_malloc=yes
  1581. fi
  1582. if test "x$tcmalloc" = "xyes"; then
  1583. using_custom_malloc=yes
  1584. fi
  1585. if test "$using_custom_malloc" = "no"; then
  1586. AC_CHECK_FUNCS(mallinfo)
  1587. fi
  1588. # By default, we're going to assume we don't have mlockall()
  1589. # bionic and other platforms have various broken mlockall subsystems.
  1590. # Some systems don't have a working mlockall, some aren't linkable,
  1591. # and some have it but don't declare it.
  1592. AC_CHECK_FUNCS(mlockall)
  1593. AC_CHECK_DECLS([mlockall], , , [
  1594. #ifdef HAVE_SYS_MMAN_H
  1595. #include <sys/mman.h>
  1596. #endif])
  1597. # Allow user to specify an alternate syslog facility
  1598. AC_ARG_WITH(syslog-facility,
  1599. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1600. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1601. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1602. AC_SUBST(LOGFACILITY)
  1603. # Check if we have getresuid and getresgid
  1604. AC_CHECK_FUNCS(getresuid getresgid)
  1605. # Check for gethostbyname_r in all its glorious incompatible versions.
  1606. # (This logic is based on that in Python's configure.in)
  1607. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1608. [Define this if you have any gethostbyname_r()])
  1609. AC_CHECK_FUNC(gethostbyname_r, [
  1610. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1611. OLD_CFLAGS=$CFLAGS
  1612. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1613. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1614. #include <netdb.h>
  1615. ]], [[
  1616. char *cp1, *cp2;
  1617. struct hostent *h1, *h2;
  1618. int i1, i2;
  1619. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1620. ]])],[
  1621. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1622. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1623. [Define this if gethostbyname_r takes 6 arguments])
  1624. AC_MSG_RESULT(6)
  1625. ], [
  1626. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1627. #include <netdb.h>
  1628. ]], [[
  1629. char *cp1, *cp2;
  1630. struct hostent *h1;
  1631. int i1, i2;
  1632. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1633. ]])], [
  1634. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1635. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1636. [Define this if gethostbyname_r takes 5 arguments])
  1637. AC_MSG_RESULT(5)
  1638. ], [
  1639. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1640. #include <netdb.h>
  1641. ]], [[
  1642. char *cp1;
  1643. struct hostent *h1;
  1644. struct hostent_data hd;
  1645. (void) gethostbyname_r(cp1,h1,&hd);
  1646. ]])], [
  1647. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1648. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1649. [Define this if gethostbyname_r takes 3 arguments])
  1650. AC_MSG_RESULT(3)
  1651. ], [
  1652. AC_MSG_RESULT(0)
  1653. ])
  1654. ])
  1655. ])
  1656. CFLAGS=$OLD_CFLAGS
  1657. ])
  1658. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1659. tor_cv_have_func_macro,
  1660. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1661. #include <stdio.h>
  1662. int main(int c, char **v) { puts(__func__); }])],
  1663. tor_cv_have_func_macro=yes,
  1664. tor_cv_have_func_macro=no))
  1665. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1666. tor_cv_have_FUNC_macro,
  1667. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1668. #include <stdio.h>
  1669. int main(int c, char **v) { puts(__FUNC__); }])],
  1670. tor_cv_have_FUNC_macro=yes,
  1671. tor_cv_have_FUNC_macro=no))
  1672. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1673. tor_cv_have_FUNCTION_macro,
  1674. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1675. #include <stdio.h>
  1676. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1677. tor_cv_have_FUNCTION_macro=yes,
  1678. tor_cv_have_FUNCTION_macro=no))
  1679. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1680. tor_cv_have_environ_declared,
  1681. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1682. #ifdef HAVE_UNISTD_H
  1683. #include <unistd.h>
  1684. #endif
  1685. #include <stdlib.h>
  1686. int main(int c, char **v) { char **t = environ; }])],
  1687. tor_cv_have_environ_declared=yes,
  1688. tor_cv_have_environ_declared=no))
  1689. if test "$tor_cv_have_func_macro" = "yes"; then
  1690. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1691. fi
  1692. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1693. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1694. fi
  1695. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1696. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1697. [Defined if the compiler supports __FUNCTION__])
  1698. fi
  1699. if test "$tor_cv_have_environ_declared" = "yes"; then
  1700. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1701. [Defined if we have extern char **environ already declared])
  1702. fi
  1703. # $prefix stores the value of the --prefix command line option, or
  1704. # NONE if the option wasn't set. In the case that it wasn't set, make
  1705. # it be the default, so that we can use it to expand directories now.
  1706. if test "x$prefix" = "xNONE"; then
  1707. prefix=$ac_default_prefix
  1708. fi
  1709. # and similarly for $exec_prefix
  1710. if test "x$exec_prefix" = "xNONE"; then
  1711. exec_prefix=$prefix
  1712. fi
  1713. if test "x$BUILDDIR" = "x"; then
  1714. BUILDDIR=`pwd`
  1715. fi
  1716. AC_SUBST(BUILDDIR)
  1717. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1718. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1719. if test "x$SRCDIR" = "x"; then
  1720. SRCDIR=$(cd "$srcdir"; pwd)
  1721. fi
  1722. AH_TEMPLATE([SRCDIR],[tor's sourcedir directory])
  1723. AC_DEFINE_UNQUOTED(SRCDIR,"$SRCDIR")
  1724. if test "x$CONFDIR" = "x"; then
  1725. CONFDIR=`eval echo $sysconfdir/tor`
  1726. fi
  1727. AC_SUBST(CONFDIR)
  1728. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1729. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1730. BINDIR=`eval echo $bindir`
  1731. AC_SUBST(BINDIR)
  1732. LOCALSTATEDIR=`eval echo $localstatedir`
  1733. AC_SUBST(LOCALSTATEDIR)
  1734. if test "$bwin32" = "true"; then
  1735. # Test if the linker supports the --nxcompat and --dynamicbase options
  1736. # for Windows
  1737. save_LDFLAGS="$LDFLAGS"
  1738. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1739. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1740. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1741. [AC_MSG_RESULT([yes])]
  1742. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1743. [AC_MSG_RESULT([no])]
  1744. )
  1745. LDFLAGS="$save_LDFLAGS"
  1746. fi
  1747. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1748. # than autoconf's macros like.
  1749. if test "$GCC" = "yes"; then
  1750. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1751. # accident waiting to happen.
  1752. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1753. else
  1754. # Override optimization level for non-gcc compilers
  1755. CFLAGS="$CFLAGS -O"
  1756. enable_gcc_warnings=no
  1757. enable_gcc_warnings_advisory=no
  1758. fi
  1759. # Warnings implies advisory-warnings and -Werror.
  1760. if test "$enable_gcc_warnings" = "yes"; then
  1761. enable_gcc_warnings_advisory=yes
  1762. enable_fatal_warnings=yes
  1763. fi
  1764. # OS X Lion started deprecating the system openssl. Let's just disable
  1765. # all deprecation warnings on OS X. Also, to potentially make the binary
  1766. # a little smaller, let's enable dead_strip.
  1767. case "$host_os" in
  1768. darwin*)
  1769. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1770. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1771. esac
  1772. # Add some more warnings which we use in development but not in the
  1773. # released versions. (Some relevant gcc versions can't handle these.)
  1774. #
  1775. # Note that we have to do this near the end of the autoconf process, or
  1776. # else we may run into problems when these warnings hit on the testing C
  1777. # programs that autoconf wants to build.
  1778. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1779. case "$host" in
  1780. *-*-openbsd* | *-*-bitrig*)
  1781. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1782. # That's fine, except that the headers don't pass -Wredundant-decls.
  1783. # Therefore, let's disable -Wsystem-headers when we're building
  1784. # with maximal warnings on OpenBSD.
  1785. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1786. esac
  1787. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1788. # have it work better.
  1789. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1790. # This warning was added in gcc 4.3, but it appears to generate
  1791. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1792. #CFLAGS="$CFLAGS -Wlogical-op"
  1793. m4_foreach_w([warning_flag], [
  1794. -Waddress
  1795. -Waddress-of-array-temporary
  1796. -Waddress-of-temporary
  1797. -Wambiguous-macro
  1798. -Wanonymous-pack-parens
  1799. -Warc
  1800. -Warc-abi
  1801. -Warc-bridge-casts-disallowed-in-nonarc
  1802. -Warc-maybe-repeated-use-of-weak
  1803. -Warc-performSelector-leaks
  1804. -Warc-repeated-use-of-weak
  1805. -Warray-bounds
  1806. -Warray-bounds-pointer-arithmetic
  1807. -Wasm
  1808. -Wasm-operand-widths
  1809. -Watomic-properties
  1810. -Watomic-property-with-user-defined-accessor
  1811. -Wauto-import
  1812. -Wauto-storage-class
  1813. -Wauto-var-id
  1814. -Wavailability
  1815. -Wbackslash-newline-escape
  1816. -Wbad-array-new-length
  1817. -Wbind-to-temporary-copy
  1818. -Wbitfield-constant-conversion
  1819. -Wbool-conversion
  1820. -Wbool-conversions
  1821. -Wbuiltin-requires-header
  1822. -Wchar-align
  1823. -Wcompare-distinct-pointer-types
  1824. -Wcomplex-component-init
  1825. -Wconditional-type-mismatch
  1826. -Wconfig-macros
  1827. -Wconstant-conversion
  1828. -Wconstant-logical-operand
  1829. -Wconstexpr-not-const
  1830. -Wcustom-atomic-properties
  1831. -Wdangling-field
  1832. -Wdangling-initializer-list
  1833. -Wdate-time
  1834. -Wdelegating-ctor-cycles
  1835. -Wdeprecated-implementations
  1836. -Wdeprecated-register
  1837. -Wdirect-ivar-access
  1838. -Wdiscard-qual
  1839. -Wdistributed-object-modifiers
  1840. -Wdivision-by-zero
  1841. -Wdollar-in-identifier-extension
  1842. -Wdouble-promotion
  1843. -Wduplicate-decl-specifier
  1844. -Wduplicate-enum
  1845. -Wduplicate-method-arg
  1846. -Wduplicate-method-match
  1847. -Wduplicated-cond
  1848. -Wdynamic-class-memaccess
  1849. -Wembedded-directive
  1850. -Wempty-translation-unit
  1851. -Wenum-conversion
  1852. -Wexit-time-destructors
  1853. -Wexplicit-ownership-type
  1854. -Wextern-initializer
  1855. -Wextra
  1856. -Wextra-semi
  1857. -Wextra-tokens
  1858. -Wflexible-array-extensions
  1859. -Wfloat-conversion
  1860. -Wformat-non-iso
  1861. -Wfour-char-constants
  1862. -Wgcc-compat
  1863. -Wglobal-constructors
  1864. -Wgnu-array-member-paren-init
  1865. -Wgnu-designator
  1866. -Wgnu-static-float-init
  1867. -Wheader-guard
  1868. -Wheader-hygiene
  1869. -Widiomatic-parentheses
  1870. -Wignored-attributes
  1871. -Wimplicit-atomic-properties
  1872. -Wimplicit-conversion-floating-point-to-bool
  1873. -Wimplicit-exception-spec-mismatch
  1874. -Wimplicit-fallthrough
  1875. -Wimplicit-fallthrough-per-function
  1876. -Wimplicit-retain-self
  1877. -Wimport-preprocessor-directive-pedantic
  1878. -Wincompatible-library-redeclaration
  1879. -Wincompatible-pointer-types-discards-qualifiers
  1880. -Wincomplete-implementation
  1881. -Wincomplete-module
  1882. -Wincomplete-umbrella
  1883. -Winit-self
  1884. -Wint-conversions
  1885. -Wint-to-void-pointer-cast
  1886. -Winteger-overflow
  1887. -Winvalid-constexpr
  1888. -Winvalid-iboutlet
  1889. -Winvalid-noreturn
  1890. -Winvalid-pp-token
  1891. -Winvalid-source-encoding
  1892. -Winvalid-token-paste
  1893. -Wknr-promoted-parameter
  1894. -Wlarge-by-value-copy
  1895. -Wliteral-conversion
  1896. -Wliteral-range
  1897. -Wlocal-type-template-args
  1898. -Wlogical-op
  1899. -Wloop-analysis
  1900. -Wmain-return-type
  1901. -Wmalformed-warning-check
  1902. -Wmethod-signatures
  1903. -Wmicrosoft
  1904. -Wmicrosoft-exists
  1905. -Wmismatched-parameter-types
  1906. -Wmismatched-return-types
  1907. -Wmissing-field-initializers
  1908. -Wmissing-format-attribute
  1909. -Wmissing-noreturn
  1910. -Wmissing-selector-name
  1911. -Wmissing-sysroot
  1912. -Wmissing-variable-declarations
  1913. -Wmodule-conflict
  1914. -Wnested-anon-types
  1915. -Wnewline-eof
  1916. -Wnon-literal-null-conversion
  1917. -Wnon-pod-varargs
  1918. -Wnonportable-cfstrings
  1919. -Wnormalized=nfkc
  1920. -Wnull-arithmetic
  1921. -Wnull-character
  1922. -Wnull-conversion
  1923. -Wnull-dereference
  1924. -Wout-of-line-declaration
  1925. -Wover-aligned
  1926. -Woverlength-strings
  1927. -Woverride-init
  1928. -Woverriding-method-mismatch
  1929. -Wpointer-type-mismatch
  1930. -Wpredefined-identifier-outside-function
  1931. -Wprotocol-property-synthesis-ambiguity
  1932. -Wreadonly-iboutlet-property
  1933. -Wreadonly-setter-attrs
  1934. -Wreceiver-expr
  1935. -Wreceiver-forward-class
  1936. -Wreceiver-is-weak
  1937. -Wreinterpret-base-class
  1938. -Wrequires-super-attribute
  1939. -Wreserved-user-defined-literal
  1940. -Wreturn-stack-address
  1941. -Wsection
  1942. -Wselector-type-mismatch
  1943. -Wsentinel
  1944. -Wserialized-diagnostics
  1945. -Wshadow
  1946. -Wshift-count-negative
  1947. -Wshift-count-overflow
  1948. -Wshift-negative-value
  1949. -Wshift-overflow=2
  1950. -Wshift-sign-overflow
  1951. -Wshorten-64-to-32
  1952. -Wsizeof-array-argument
  1953. -Wsource-uses-openmp
  1954. -Wstatic-float-init
  1955. -Wstatic-in-inline
  1956. -Wstatic-local-in-inline
  1957. -Wstrict-overflow=1
  1958. -Wstring-compare
  1959. -Wstring-conversion
  1960. -Wstrlcpy-strlcat-size
  1961. -Wstrncat-size
  1962. -Wsuggest-attribute=format
  1963. -Wsuggest-attribute=noreturn
  1964. -Wsuper-class-method-mismatch
  1965. -Wswitch-bool
  1966. -Wsync-nand
  1967. -Wtautological-constant-out-of-range-compare
  1968. -Wtentative-definition-incomplete-type
  1969. -Wtrampolines
  1970. -Wtype-safety
  1971. -Wtypedef-redefinition
  1972. -Wtypename-missing
  1973. -Wundefined-inline
  1974. -Wundefined-internal
  1975. -Wundefined-reinterpret-cast
  1976. -Wunicode
  1977. -Wunicode-whitespace
  1978. -Wunknown-warning-option
  1979. -Wunnamed-type-template-args
  1980. -Wunneeded-member-function
  1981. -Wunsequenced
  1982. -Wunsupported-visibility
  1983. -Wunused-but-set-parameter
  1984. -Wunused-but-set-variable
  1985. -Wunused-command-line-argument
  1986. -Wunused-const-variable=2
  1987. -Wunused-exception-parameter
  1988. -Wunused-local-typedefs
  1989. -Wunused-member-function
  1990. -Wunused-sanitize-argument
  1991. -Wunused-volatile-lvalue
  1992. -Wuser-defined-literals
  1993. -Wvariadic-macros
  1994. -Wvector-conversion
  1995. -Wvector-conversions
  1996. -Wvexing-parse
  1997. -Wvisibility
  1998. -Wvla-extension
  1999. -Wzero-length-array
  2000. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  2001. dnl We should re-enable this in some later version. Clang doesn't
  2002. dnl mind, but it causes trouble with GCC.
  2003. dnl -Wstrict-overflow=2
  2004. dnl These seem to require annotations that we don't currently use,
  2005. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  2006. dnl -Wthread-safety
  2007. dnl -Wthread-safety-analysis
  2008. dnl -Wthread-safety-attributes
  2009. dnl -Wthread-safety-beta
  2010. dnl -Wthread-safety-precise
  2011. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  2012. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  2013. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  2014. CFLAGS="$CFLAGS -Wwrite-strings"
  2015. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  2016. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  2017. CFLAGS="$CFLAGS -Wunused-parameter "
  2018. # These interfere with building main() { return 0; }, which autoconf
  2019. # likes to use as its default program.
  2020. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  2021. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  2022. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  2023. fi
  2024. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  2025. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  2026. fi
  2027. if test "x$enable_fatal_warnings" = "xyes"; then
  2028. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  2029. # default autoconf programs are full of errors.
  2030. CFLAGS="$CFLAGS -Werror"
  2031. fi
  2032. fi
  2033. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  2034. case "$host_os" in
  2035. darwin*)
  2036. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  2037. esac
  2038. fi
  2039. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  2040. AC_CONFIG_FILES([
  2041. Doxyfile
  2042. Makefile
  2043. config.rust
  2044. link_rust.sh
  2045. contrib/dist/suse/tor.sh
  2046. contrib/operator-tools/tor.logrotate
  2047. contrib/dist/tor.sh
  2048. contrib/dist/torctl
  2049. contrib/dist/tor.service
  2050. src/config/torrc.sample
  2051. src/config/torrc.minimal
  2052. src/rust/.cargo/config
  2053. scripts/maint/checkOptionDocs.pl
  2054. scripts/maint/updateVersions.pl
  2055. ])
  2056. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  2057. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  2058. for file in $regular_mans ; do
  2059. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  2060. echo "==================================";
  2061. echo;
  2062. echo "Building Tor has failed since manpages cannot be built.";
  2063. echo;
  2064. echo "You need asciidoc installed to be able to build the manpages.";
  2065. echo "To build without manpages, use the --disable-asciidoc argument";
  2066. echo "when calling configure.";
  2067. echo;
  2068. echo "==================================";
  2069. exit 1;
  2070. fi
  2071. done
  2072. fi
  2073. if test "$fragile_hardening" = "yes"; then
  2074. AC_MSG_WARN([
  2075. ============
  2076. Warning! Building Tor with --enable-fragile-hardening (also known as
  2077. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  2078. other kinds of attacks easier. A Tor instance build with this option will be
  2079. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  2080. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  2081. denial of service attacks. For more information, see
  2082. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  2083. ============
  2084. ])
  2085. fi
  2086. AC_OUTPUT