configure.ac 71 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],[0.3.4.0-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$enable_fragile_hardening" = "xyes"; then
  153. fragile_hardening="yes"
  154. fi
  155. dnl Linker hardening options
  156. dnl Currently these options are ELF specific - you can't use this with MacOSX
  157. AC_ARG_ENABLE(linker-hardening,
  158. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  159. AC_ARG_ENABLE(local-appdata,
  160. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  161. if test "$enable_local_appdata" = "yes"; then
  162. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  163. [Defined if we default to host local appdata paths on Windows])
  164. fi
  165. # Tor2web mode flag
  166. AC_ARG_ENABLE(tor2web-mode,
  167. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  168. [if test "x$enableval" = "xyes"; then
  169. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  170. fi])
  171. AC_ARG_ENABLE(tool-name-check,
  172. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  173. AC_ARG_ENABLE(seccomp,
  174. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  175. AC_ARG_ENABLE(libscrypt,
  176. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  177. dnl Enable event tracing which are transformed to debug log statement.
  178. AC_ARG_ENABLE(event-tracing-debug,
  179. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  180. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  181. if test x$enable_event_tracing_debug = xyes; then
  182. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  183. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  184. fi
  185. dnl Enable Android only features.
  186. AC_ARG_ENABLE(android,
  187. AS_HELP_STRING(--enable-android, [build with Android features enabled]))
  188. AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
  189. if test "x$enable_android" = "xyes"; then
  190. AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
  191. dnl Check if the Android log library is available.
  192. AC_CHECK_HEADERS([android/log.h])
  193. AC_SEARCH_LIBS(__android_log_write, [log])
  194. fi
  195. dnl check for the correct "ar" when cross-compiling.
  196. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  197. dnl so kludge up a replacement for the case where it isn't there yet.)
  198. m4_ifdef([AM_PROG_AR],
  199. [AM_PROG_AR],
  200. [AN_MAKEVAR([AR], [AC_PROG_AR])
  201. AN_PROGRAM([ar], [AC_PROG_AR])
  202. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  203. AC_PROG_AR])
  204. dnl Check whether the above macro has settled for a simply named tool even
  205. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  206. dnl because that will find any cc on the system, not only the cross-compiler,
  207. dnl and then verify that a binary built with this compiler runs on the
  208. dnl build system. It will then come to the false conclusion that we're not
  209. dnl cross-compiling.
  210. if test "x$enable_tool_name_check" != "xno"; then
  211. if test "x$ac_tool_warned" = "xyes"; then
  212. 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.)])
  213. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  214. 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.)])
  215. fi
  216. fi
  217. AC_PROG_CC
  218. AC_PROG_CPP
  219. AC_PROG_MAKE_SET
  220. AC_PROG_RANLIB
  221. AC_PROG_SED
  222. AC_ARG_VAR([PERL], [path to Perl binary])
  223. AC_CHECK_PROGS([PERL], [perl])
  224. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  225. dnl check for asciidoc and a2x
  226. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  227. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  228. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  229. AM_PROG_CC_C_O
  230. AC_PROG_CC_C99
  231. AC_ARG_VAR([PYTHON], [path to Python binary])
  232. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  233. if test "x$PYTHON" = "x"; then
  234. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  235. fi
  236. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  237. dnl List all external rust crates we depend on here. Include the version
  238. rust_crates="libc-0.2.39"
  239. AC_SUBST(rust_crates)
  240. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  241. AC_C_FLEXIBLE_ARRAY_MEMBER
  242. ], [
  243. dnl Maybe we've got an old autoconf...
  244. AC_CACHE_CHECK([for flexible array members],
  245. tor_cv_c_flexarray,
  246. [AC_COMPILE_IFELSE(
  247. AC_LANG_PROGRAM([
  248. struct abc { int a; char b[]; };
  249. ], [
  250. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  251. def->b[0] = 33;
  252. ]),
  253. [tor_cv_c_flexarray=yes],
  254. [tor_cv_c_flexarray=no])])
  255. if test "$tor_cv_flexarray" = "yes"; then
  256. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  257. else
  258. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  259. fi
  260. ])
  261. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  262. tor_cv_c_c99_decl,
  263. [AC_COMPILE_IFELSE(
  264. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  265. [tor_cv_c_c99_decl=yes],
  266. [tor_cv_c_c99_decl=no] )])
  267. if test "$tor_cv_c_c99_decl" != "yes"; then
  268. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  269. fi
  270. AC_CACHE_CHECK([for working C99 designated initializers],
  271. tor_cv_c_c99_designated_init,
  272. [AC_COMPILE_IFELSE(
  273. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  274. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  275. [tor_cv_c_c99_designated_init=yes],
  276. [tor_cv_c_c99_designated_init=no] )])
  277. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  278. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  279. fi
  280. TORUSER=_tor
  281. AC_ARG_WITH(tor-user,
  282. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  283. [
  284. TORUSER=$withval
  285. ]
  286. )
  287. AC_SUBST(TORUSER)
  288. TORGROUP=_tor
  289. AC_ARG_WITH(tor-group,
  290. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  291. [
  292. TORGROUP=$withval
  293. ]
  294. )
  295. AC_SUBST(TORGROUP)
  296. dnl If _WIN32 is defined and non-zero, we are building for win32
  297. AC_MSG_CHECKING([for win32])
  298. AC_RUN_IFELSE([AC_LANG_SOURCE([
  299. int main(int c, char **v) {
  300. #ifdef _WIN32
  301. #if _WIN32
  302. return 0;
  303. #else
  304. return 1;
  305. #endif
  306. #else
  307. return 2;
  308. #endif
  309. }])],
  310. bwin32=true; AC_MSG_RESULT([yes]),
  311. bwin32=false; AC_MSG_RESULT([no]),
  312. bwin32=cross; AC_MSG_RESULT([cross])
  313. )
  314. if test "$bwin32" = "cross"; then
  315. AC_MSG_CHECKING([for win32 (cross)])
  316. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  317. #ifdef _WIN32
  318. int main(int c, char **v) {return 0;}
  319. #else
  320. #error
  321. int main(int c, char **v) {return x(y);}
  322. #endif
  323. ])],
  324. bwin32=true; AC_MSG_RESULT([yes]),
  325. bwin32=false; AC_MSG_RESULT([no]))
  326. fi
  327. AH_BOTTOM([
  328. #ifdef _WIN32
  329. /* Defined to access windows functions and definitions for >=WinXP */
  330. # ifndef WINVER
  331. # define WINVER 0x0501
  332. # endif
  333. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  334. # ifndef _WIN32_WINNT
  335. # define _WIN32_WINNT 0x0501
  336. # endif
  337. /* Defined to avoid including some windows headers as part of Windows.h */
  338. # ifndef WIN32_LEAN_AND_MEAN
  339. # define WIN32_LEAN_AND_MEAN 1
  340. # endif
  341. #endif
  342. ])
  343. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  344. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  345. dnl Enable C99 when compiling with MIPSpro
  346. AC_MSG_CHECKING([for MIPSpro compiler])
  347. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  348. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  349. #error
  350. return x(y);
  351. #endif
  352. ])],
  353. bmipspro=false; AC_MSG_RESULT(no),
  354. bmipspro=true; AC_MSG_RESULT(yes))
  355. if test "$bmipspro" = "true"; then
  356. CFLAGS="$CFLAGS -c99"
  357. fi
  358. AC_C_BIGENDIAN
  359. if test "x$enable_rust" = "xyes"; then
  360. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  361. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  362. if test "x$RUSTC" = "xno"; then
  363. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  364. fi
  365. AC_ARG_VAR([CARGO], [path to the cargo binary])
  366. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  367. if test "x$CARGO" = "xno"; then
  368. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  369. fi
  370. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  371. if test "x$enable_cargo_online_mode" = "xyes"; then
  372. CARGO_ONLINE=
  373. RUST_DL=#
  374. else
  375. CARGO_ONLINE=--frozen
  376. RUST_DL=
  377. dnl When we're not allowed to touch the network, we need crate dependencies
  378. dnl locally available.
  379. AC_MSG_CHECKING([rust crate dependencies])
  380. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  381. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  382. TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
  383. fi
  384. dnl Check whether the path exists before we try to cd into it.
  385. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  386. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  387. ERRORED=1
  388. fi
  389. dnl Make the path absolute, since we'll be using it from within a
  390. dnl subdirectory.
  391. TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
  392. for dep in $rust_crates; do
  393. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  394. 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.])
  395. ERRORED=1
  396. fi
  397. done
  398. if test "x$ERRORED" = "x"; then
  399. AC_MSG_RESULT([yes])
  400. fi
  401. fi
  402. dnl This is a workaround for #46797
  403. dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ). Once the
  404. dnl upstream bug is fixed, we can remove this workaround.
  405. case "$host_os" in
  406. darwin*)
  407. TOR_RUST_EXTRA_LIBS="-lresolv"
  408. ;;
  409. esac
  410. dnl For now both MSVC and MinGW rust libraries will output static libs with
  411. dnl the MSVC naming convention.
  412. if test "$bwin32" = "true"; then
  413. TOR_RUST_STATIC_NAME=tor_rust.lib
  414. else
  415. TOR_RUST_STATIC_NAME=libtor_rust.a
  416. fi
  417. AC_SUBST(TOR_RUST_STATIC_NAME)
  418. AC_SUBST(CARGO_ONLINE)
  419. AC_SUBST(RUST_DL)
  420. dnl Let's check the rustc version, too
  421. AC_MSG_CHECKING([rust version])
  422. RUSTC_VERSION=`$RUSTC --version`
  423. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  424. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  425. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  426. AC_MSG_ERROR([rustc version couldn't be identified])
  427. fi
  428. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  429. AC_MSG_ERROR([rustc must be at least version 1.14])
  430. fi
  431. AC_MSG_RESULT([$RUSTC_VERSION])
  432. fi
  433. AC_SUBST(TOR_RUST_EXTRA_LIBS)
  434. AC_SEARCH_LIBS(socket, [socket network])
  435. AC_SEARCH_LIBS(gethostbyname, [nsl])
  436. AC_SEARCH_LIBS(dlopen, [dl])
  437. AC_SEARCH_LIBS(inet_aton, [resolv])
  438. AC_SEARCH_LIBS(backtrace, [execinfo])
  439. saved_LIBS="$LIBS"
  440. AC_SEARCH_LIBS([clock_gettime], [rt])
  441. if test "$LIBS" != "$saved_LIBS"; then
  442. # Looks like we need -lrt for clock_gettime().
  443. have_rt=yes
  444. fi
  445. AC_SEARCH_LIBS(pthread_create, [pthread])
  446. AC_SEARCH_LIBS(pthread_detach, [pthread])
  447. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  448. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  449. AC_CHECK_FUNCS(
  450. _NSGetEnviron \
  451. RtlSecureZeroMemory \
  452. SecureZeroMemory \
  453. accept4 \
  454. backtrace \
  455. backtrace_symbols_fd \
  456. eventfd \
  457. explicit_bzero \
  458. timingsafe_memcmp \
  459. flock \
  460. ftime \
  461. get_current_dir_name \
  462. getaddrinfo \
  463. getifaddrs \
  464. getpass \
  465. getrlimit \
  466. gettimeofday \
  467. gmtime_r \
  468. gnu_get_libc_version \
  469. htonll \
  470. inet_aton \
  471. ioctl \
  472. issetugid \
  473. llround \
  474. localtime_r \
  475. lround \
  476. mach_approximate_time \
  477. memmem \
  478. memset_s \
  479. mmap \
  480. pipe \
  481. pipe2 \
  482. prctl \
  483. readpassphrase \
  484. rint \
  485. sigaction \
  486. socketpair \
  487. statvfs \
  488. strlcat \
  489. strlcpy \
  490. strnlen \
  491. strptime \
  492. strtok_r \
  493. strtoull \
  494. sysconf \
  495. sysctl \
  496. truncate \
  497. uname \
  498. usleep \
  499. vasprintf \
  500. _vscprintf
  501. )
  502. # Apple messed up when they added two functions functions in Sierra: they
  503. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  504. # checks. So we should only probe for those functions if we are sure that we
  505. # are not targeting OSX 10.11 or earlier.
  506. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  507. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  508. #ifdef __APPLE__
  509. # include <AvailabilityMacros.h>
  510. # ifndef MAC_OS_X_VERSION_10_12
  511. # define MAC_OS_X_VERSION_10_12 101200
  512. # endif
  513. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  514. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  515. # error "Running on Mac OSX 10.11 or earlier"
  516. # endif
  517. # endif
  518. #endif
  519. ]], [[]])],
  520. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  521. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  522. if test "$on_macos_pre_10_12" = "no"; then
  523. AC_CHECK_FUNCS(
  524. clock_gettime \
  525. getentropy \
  526. )
  527. fi
  528. if test "$bwin32" != "true"; then
  529. AC_CHECK_HEADERS(pthread.h)
  530. AC_CHECK_FUNCS(pthread_create)
  531. AC_CHECK_FUNCS(pthread_condattr_setclock)
  532. fi
  533. if test "$bwin32" = "true"; then
  534. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  535. #include <windows.h>
  536. #include <conio.h>
  537. #include <wchar.h>
  538. ])
  539. fi
  540. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  541. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  542. AC_MSG_CHECKING([whether free(NULL) works])
  543. AC_RUN_IFELSE([AC_LANG_PROGRAM([
  544. #include <stdlib.h>
  545. ], [
  546. char *p = NULL;
  547. free(p);
  548. ])],
  549. [free_null_ok=true; AC_MSG_RESULT(yes)],
  550. [free_null_ok=false; AC_MSG_RESULT(no)],
  551. [free_null_ok=cross; AC_MSG_RESULT(cross)])
  552. if test "$free_null_ok" = "false"; then
  553. AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
  554. fi
  555. dnl ------------------------------------------------------
  556. dnl Where do you live, libevent? And how do we call you?
  557. if test "$bwin32" = "true"; then
  558. TOR_LIB_WS32=-lws2_32
  559. TOR_LIB_IPHLPAPI=-liphlpapi
  560. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  561. # think it's actually necessary.
  562. TOR_LIB_GDI=-lgdi32
  563. TOR_LIB_USERENV=-luserenv
  564. else
  565. TOR_LIB_WS32=
  566. TOR_LIB_GDI=
  567. TOR_LIB_USERENV=
  568. fi
  569. AC_SUBST(TOR_LIB_WS32)
  570. AC_SUBST(TOR_LIB_GDI)
  571. AC_SUBST(TOR_LIB_IPHLPAPI)
  572. AC_SUBST(TOR_LIB_USERENV)
  573. tor_libevent_pkg_redhat="libevent"
  574. tor_libevent_pkg_debian="libevent-dev"
  575. tor_libevent_devpkg_redhat="libevent-devel"
  576. tor_libevent_devpkg_debian="libevent-dev"
  577. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  578. dnl linking for static builds.
  579. STATIC_LIBEVENT_FLAGS=""
  580. if test "$enable_static_libevent" = "yes"; then
  581. if test "$have_rt" = "yes"; then
  582. STATIC_LIBEVENT_FLAGS=" -lrt "
  583. fi
  584. fi
  585. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  586. #ifdef _WIN32
  587. #include <winsock2.h>
  588. #endif
  589. #include <sys/time.h>
  590. #include <sys/types.h>
  591. #include <event2/event.h>], [
  592. #ifdef _WIN32
  593. #include <winsock2.h>
  594. #endif
  595. struct event_base;
  596. struct event_base *event_base_new(void);
  597. void event_base_free(struct event_base *);],
  598. [
  599. #ifdef _WIN32
  600. {WSADATA d; WSAStartup(0x101,&d); }
  601. #endif
  602. event_base_free(event_base_new());
  603. ], [--with-libevent-dir], [/opt/libevent])
  604. dnl Determine the incantation needed to link libevent.
  605. save_LIBS="$LIBS"
  606. save_LDFLAGS="$LDFLAGS"
  607. save_CPPFLAGS="$CPPFLAGS"
  608. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  609. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  610. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  611. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  612. if test "$enable_static_libevent" = "yes"; then
  613. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  614. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  615. else
  616. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  617. fi
  618. else
  619. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  620. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  621. 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"))
  622. if test "$ac_cv_search_event_new" != "none required"; then
  623. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  624. fi
  625. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  626. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  627. fi
  628. else
  629. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  630. fi
  631. fi
  632. dnl Now check for particular libevent functions.
  633. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  634. evutil_secure_rng_add_bytes \
  635. ])
  636. LIBS="$save_LIBS"
  637. LDFLAGS="$save_LDFLAGS"
  638. CPPFLAGS="$save_CPPFLAGS"
  639. dnl Check that libevent is at least at version 2.0.10, the first stable
  640. dnl release of its series
  641. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  642. AC_MSG_CHECKING([whether Libevent is new enough])
  643. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  644. #include <event2/event.h>
  645. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  646. #error
  647. int x = y(zz);
  648. #else
  649. int x = 1;
  650. #endif
  651. ])], [ AC_MSG_RESULT([yes]) ],
  652. [ AC_MSG_RESULT([no])
  653. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  654. LIBS="$save_LIBS"
  655. LDFLAGS="$save_LDFLAGS"
  656. CPPFLAGS="$save_CPPFLAGS"
  657. AC_SUBST(TOR_LIBEVENT_LIBS)
  658. dnl ------------------------------------------------------
  659. dnl Where do you live, libm?
  660. dnl On some platforms (Haiku/BeOS) the math library is
  661. dnl part of libroot. In which case don't link against lm
  662. TOR_LIB_MATH=""
  663. save_LIBS="$LIBS"
  664. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  665. if test "$ac_cv_search_pow" != "none required"; then
  666. TOR_LIB_MATH="$ac_cv_search_pow"
  667. fi
  668. LIBS="$save_LIBS"
  669. AC_SUBST(TOR_LIB_MATH)
  670. dnl ------------------------------------------------------
  671. dnl Where do you live, openssl? And how do we call you?
  672. tor_openssl_pkg_redhat="openssl"
  673. tor_openssl_pkg_debian="libssl-dev"
  674. tor_openssl_devpkg_redhat="openssl-devel"
  675. tor_openssl_devpkg_debian="libssl-dev"
  676. ALT_openssl_WITHVAL=""
  677. AC_ARG_WITH(ssl-dir,
  678. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  679. [
  680. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  681. ALT_openssl_WITHVAL="$withval"
  682. fi
  683. ])
  684. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  685. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  686. [#include <openssl/ssl.h>],
  687. [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
  688. [TLSv1_1_method();], [],
  689. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  690. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  691. if test "$enable_static_openssl" = "yes"; then
  692. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  693. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  694. else
  695. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  696. fi
  697. else
  698. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  699. fi
  700. AC_SUBST(TOR_OPENSSL_LIBS)
  701. dnl Now check for particular openssl functions.
  702. save_LIBS="$LIBS"
  703. save_LDFLAGS="$LDFLAGS"
  704. save_CPPFLAGS="$CPPFLAGS"
  705. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  706. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  707. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  708. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  709. #include <openssl/opensslv.h>
  710. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  711. #error "too old"
  712. #endif
  713. ]], [[]])],
  714. [ : ],
  715. [ 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.]) ])
  716. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  717. #include <openssl/opensslv.h>
  718. #include <openssl/evp.h>
  719. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  720. #error "no ECC"
  721. #endif
  722. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  723. #error "curves unavailable"
  724. #endif
  725. ]], [[]])],
  726. [ : ],
  727. [ 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.]) ])
  728. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  729. [#include <openssl/ssl.h>
  730. ])
  731. AC_CHECK_FUNCS([ \
  732. SSL_SESSION_get_master_key \
  733. SSL_get_server_random \
  734. SSL_get_client_ciphers \
  735. SSL_get_client_random \
  736. SSL_CIPHER_find \
  737. TLS_method
  738. ])
  739. dnl Check if OpenSSL has scrypt implementation.
  740. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  741. dnl Check if OpenSSL structures are opaque
  742. AC_CHECK_MEMBERS([SSL.state], , ,
  743. [#include <openssl/ssl.h>
  744. ])
  745. AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
  746. #include <openssl/sha.h>
  747. ])
  748. dnl Define the set of checks for KIST scheduler support.
  749. AC_DEFUN([CHECK_KIST_SUPPORT],[
  750. dnl KIST needs struct tcp_info and for certain members to exist.
  751. AC_CHECK_MEMBERS(
  752. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  753. , ,[[#include <netinet/tcp.h>]])
  754. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  755. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  756. #include <linux/sockios.h>
  757. #ifndef SIOCOUTQNSD
  758. #error
  759. #endif
  760. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  761. if test "x$have_siocoutqnsd" = "xyes"; then
  762. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  763. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  764. have_kist_support=yes
  765. fi
  766. fi
  767. fi
  768. ])
  769. dnl Now, trigger the check.
  770. CHECK_KIST_SUPPORT
  771. AS_IF([test "x$have_kist_support" = "xyes"],
  772. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  773. on this system])],
  774. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  775. LIBS="$save_LIBS"
  776. LDFLAGS="$save_LDFLAGS"
  777. CPPFLAGS="$save_CPPFLAGS"
  778. dnl ------------------------------------------------------
  779. dnl Where do you live, zlib? And how do we call you?
  780. tor_zlib_pkg_redhat="zlib"
  781. tor_zlib_pkg_debian="zlib1g"
  782. tor_zlib_devpkg_redhat="zlib-devel"
  783. tor_zlib_devpkg_debian="zlib1g-dev"
  784. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  785. [#include <zlib.h>],
  786. [const char * zlibVersion(void);],
  787. [zlibVersion();], [--with-zlib-dir],
  788. [/opt/zlib])
  789. if test "$enable_static_zlib" = "yes"; then
  790. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  791. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  792. using --enable-static-zlib")
  793. else
  794. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  795. fi
  796. else
  797. TOR_ZLIB_LIBS="-lz"
  798. fi
  799. AC_SUBST(TOR_ZLIB_LIBS)
  800. dnl ------------------------------------------------------
  801. dnl Where we do we find lzma?
  802. AC_ARG_ENABLE(lzma,
  803. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  804. [case "${enableval}" in
  805. "yes") lzma=true ;;
  806. "no") lzma=false ;;
  807. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  808. esac], [lzma=auto])
  809. if test "x$enable_lzma" = "xno"; then
  810. have_lzma=no;
  811. else
  812. PKG_CHECK_MODULES([LZMA],
  813. [liblzma],
  814. have_lzma=yes,
  815. have_lzma=no)
  816. if test "x$have_lzma" = "xno" ; then
  817. AC_MSG_WARN([Unable to find liblzma.])
  818. fi
  819. fi
  820. if test "x$have_lzma" = "xyes"; then
  821. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  822. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  823. TOR_LZMA_LIBS="${LZMA_LIBS}"
  824. fi
  825. AC_SUBST(TOR_LZMA_CFLAGS)
  826. AC_SUBST(TOR_LZMA_LIBS)
  827. dnl ------------------------------------------------------
  828. dnl Where we do we find zstd?
  829. AC_ARG_ENABLE(zstd,
  830. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  831. [case "${enableval}" in
  832. "yes") zstd=true ;;
  833. "no") zstd=false ;;
  834. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  835. esac], [zstd=auto])
  836. if test "x$enable_zstd" = "xno"; then
  837. have_zstd=no;
  838. else
  839. PKG_CHECK_MODULES([ZSTD],
  840. [libzstd >= 1.1],
  841. have_zstd=yes,
  842. have_zstd=no)
  843. if test "x$have_zstd" = "xno" ; then
  844. AC_MSG_WARN([Unable to find libzstd.])
  845. fi
  846. fi
  847. if test "x$have_zstd" = "xyes"; then
  848. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  849. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  850. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  851. dnl now check for zstd functions
  852. save_LIBS="$LIBS"
  853. save_CFLAGS="$CFLAGS"
  854. LIBS="$LIBS $ZSTD_LIBS"
  855. CFLAGS="$CFLAGS $ZSTD_CFLAGS"
  856. AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
  857. ZSTD_estimateDCtxSize)
  858. LIBS="$save_LIBS"
  859. CFLAGS="$save_CFLAGS"
  860. fi
  861. AC_SUBST(TOR_ZSTD_CFLAGS)
  862. AC_SUBST(TOR_ZSTD_LIBS)
  863. dnl ----------------------------------------------------------------------
  864. dnl Check if libcap is available for capabilities.
  865. tor_cap_pkg_debian="libcap2"
  866. tor_cap_pkg_redhat="libcap"
  867. tor_cap_devpkg_debian="libcap-dev"
  868. tor_cap_devpkg_redhat="libcap-devel"
  869. AC_CHECK_LIB([cap], [cap_init], [],
  870. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  871. )
  872. AC_CHECK_FUNCS(cap_set_proc)
  873. dnl ---------------------------------------------------------------------
  874. dnl Now that we know about our major libraries, we can check for compiler
  875. dnl and linker hardening options. We need to do this with the libraries known,
  876. dnl since sometimes the linker will like an option but not be willing to
  877. dnl use it with a build of a library.
  878. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  879. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  880. CFLAGS_FTRAPV=
  881. CFLAGS_FWRAPV=
  882. CFLAGS_ASAN=
  883. CFLAGS_UBSAN=
  884. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  885. #if !defined(__clang__)
  886. #error
  887. #endif])], have_clang=yes, have_clang=no)
  888. if test "x$enable_gcc_hardening" != "xno"; then
  889. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  890. if test "x$have_clang" = "xyes"; then
  891. TOR_CHECK_CFLAGS(-Qunused-arguments)
  892. fi
  893. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  894. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  895. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  896. m4_ifdef([AS_VAR_IF],[
  897. AS_VAR_IF(can_compile, [yes],
  898. AS_VAR_IF(can_link, [yes],
  899. [],
  900. 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.)]))
  901. )])
  902. AS_VAR_POPDEF([can_link])
  903. AS_VAR_POPDEF([can_compile])
  904. TOR_CHECK_CFLAGS(-Wstack-protector)
  905. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  906. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  907. TOR_CHECK_CFLAGS(-fPIE)
  908. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  909. fi
  910. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  911. fi
  912. if test "$fragile_hardening" = "yes"; then
  913. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  914. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  915. 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.])
  916. fi
  917. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  918. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  919. fi
  920. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  921. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  922. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  923. fi
  924. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  925. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  926. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  927. fi
  928. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  929. fi
  930. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  931. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  932. mulodi_fixes_ftrapv=no
  933. if test "$have_clang" = "yes"; then
  934. saved_CFLAGS="$CFLAGS"
  935. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  936. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  937. AC_LINK_IFELSE([
  938. AC_LANG_SOURCE([[
  939. #include <stdint.h>
  940. #include <stdlib.h>
  941. int main(int argc, char **argv)
  942. {
  943. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  944. * (int64_t)atoi(argv[3]);
  945. return x == 9;
  946. } ]])],
  947. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  948. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  949. if test "$ftrapv_can_link" = "no"; then
  950. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  951. AC_LINK_IFELSE([
  952. AC_LANG_SOURCE([[
  953. #include <stdint.h>
  954. #include <stdlib.h>
  955. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  956. *overflow=0;
  957. return a;
  958. }
  959. int main(int argc, char **argv)
  960. {
  961. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  962. * (int64_t)atoi(argv[3]);
  963. return x == 9;
  964. } ]])],
  965. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  966. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  967. fi
  968. CFLAGS="$saved_CFLAGS"
  969. fi
  970. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  971. dnl These cflags add bunches of branches, and we haven't been able to
  972. dnl persuade ourselves that they're suitable for code that needs to be
  973. dnl constant time.
  974. AC_SUBST(CFLAGS_BUGTRAP)
  975. dnl These cflags are variant ones sutable for code that needs to be
  976. dnl constant-time.
  977. AC_SUBST(CFLAGS_CONSTTIME)
  978. if test "x$enable_linker_hardening" != "xno"; then
  979. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  980. fi
  981. # For backtrace support
  982. TOR_CHECK_LDFLAGS(-rdynamic)
  983. dnl ------------------------------------------------------
  984. dnl Now see if we have a -fomit-frame-pointer compiler option.
  985. saved_CFLAGS="$CFLAGS"
  986. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  987. F_OMIT_FRAME_POINTER=''
  988. if test "$saved_CFLAGS" != "$CFLAGS"; then
  989. if test "$fragile_hardening" = "yes"; then
  990. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  991. fi
  992. fi
  993. CFLAGS="$saved_CFLAGS"
  994. AC_SUBST(F_OMIT_FRAME_POINTER)
  995. dnl ------------------------------------------------------
  996. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  997. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  998. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  999. dnl code will work.
  1000. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  1001. dnl ============================================================
  1002. dnl Check for libseccomp
  1003. if test "x$enable_seccomp" != "xno"; then
  1004. AC_CHECK_HEADERS([seccomp.h])
  1005. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  1006. fi
  1007. dnl ============================================================
  1008. dnl Check for libscrypt
  1009. if test "x$enable_libscrypt" != "xno"; then
  1010. AC_CHECK_HEADERS([libscrypt.h])
  1011. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  1012. AC_CHECK_FUNCS([libscrypt_scrypt])
  1013. fi
  1014. dnl ============================================================
  1015. dnl We need an implementation of curve25519.
  1016. dnl set these defaults.
  1017. build_curve25519_donna=no
  1018. build_curve25519_donna_c64=no
  1019. use_curve25519_donna=no
  1020. use_curve25519_nacl=no
  1021. CURVE25519_LIBS=
  1022. dnl The best choice is using curve25519-donna-c64, but that requires
  1023. dnl that we
  1024. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  1025. tor_cv_can_use_curve25519_donna_c64,
  1026. [AC_RUN_IFELSE(
  1027. [AC_LANG_PROGRAM([dnl
  1028. #include <stdint.h>
  1029. typedef unsigned uint128_t __attribute__((mode(TI)));
  1030. int func(uint64_t a, uint64_t b) {
  1031. uint128_t c = ((uint128_t)a) * b;
  1032. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1033. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1034. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1035. (((uint64_t)(c))&0xffffffffL) == 0;
  1036. return ok;
  1037. }
  1038. ], [dnl
  1039. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1040. ((uint64_t)1234567890) << 24);
  1041. return !ok;
  1042. ])],
  1043. [tor_cv_can_use_curve25519_donna_c64=yes],
  1044. [tor_cv_can_use_curve25519_donna_c64=no],
  1045. [AC_LINK_IFELSE(
  1046. [AC_LANG_PROGRAM([dnl
  1047. #include <stdint.h>
  1048. typedef unsigned uint128_t __attribute__((mode(TI)));
  1049. int func(uint64_t a, uint64_t b) {
  1050. uint128_t c = ((uint128_t)a) * b;
  1051. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1052. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1053. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1054. (((uint64_t)(c))&0xffffffffL) == 0;
  1055. return ok;
  1056. }
  1057. ], [dnl
  1058. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1059. ((uint64_t)1234567890) << 24);
  1060. return !ok;
  1061. ])],
  1062. [tor_cv_can_use_curve25519_donna_c64=cross],
  1063. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1064. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1065. nacl/crypto_scalarmult_curve25519.h])
  1066. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1067. tor_cv_can_use_curve25519_nacl,
  1068. [tor_saved_LIBS="$LIBS"
  1069. LIBS="$LIBS -lnacl"
  1070. AC_LINK_IFELSE(
  1071. [AC_LANG_PROGRAM([dnl
  1072. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1073. #include <crypto_scalarmult_curve25519.h>
  1074. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1075. #include <nacl/crypto_scalarmult_curve25519.h>
  1076. #endif
  1077. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1078. #error Hey, this is the reference implementation! That's not fast.
  1079. #endif
  1080. ], [
  1081. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1082. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1083. [tor_cv_can_use_curve25519_nacl=no])
  1084. LIBS="$tor_saved_LIBS" ])
  1085. dnl Okay, now we need to figure out which one to actually use. Fall back
  1086. dnl to curve25519-donna.c
  1087. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1088. build_curve25519_donna_c64=yes
  1089. use_curve25519_donna=yes
  1090. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1091. use_curve25519_nacl=yes
  1092. CURVE25519_LIBS=-lnacl
  1093. else
  1094. build_curve25519_donna=yes
  1095. use_curve25519_donna=yes
  1096. fi
  1097. if test "x$use_curve25519_donna" = "xyes"; then
  1098. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1099. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1100. fi
  1101. if test "x$use_curve25519_nacl" = "xyes"; then
  1102. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1103. [Defined if we should use a curve25519 from nacl])
  1104. fi
  1105. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1106. test "x$build_curve25519_donna" = "xyes")
  1107. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1108. test "x$build_curve25519_donna_c64" = "xyes")
  1109. AC_SUBST(CURVE25519_LIBS)
  1110. dnl Make sure to enable support for large off_t if available.
  1111. AC_SYS_LARGEFILE
  1112. AC_CHECK_HEADERS([assert.h \
  1113. errno.h \
  1114. fcntl.h \
  1115. signal.h \
  1116. string.h \
  1117. sys/capability.h \
  1118. sys/fcntl.h \
  1119. sys/stat.h \
  1120. sys/time.h \
  1121. sys/types.h \
  1122. time.h \
  1123. unistd.h \
  1124. arpa/inet.h \
  1125. crt_externs.h \
  1126. execinfo.h \
  1127. gnu/libc-version.h \
  1128. grp.h \
  1129. ifaddrs.h \
  1130. inttypes.h \
  1131. limits.h \
  1132. linux/types.h \
  1133. machine/limits.h \
  1134. malloc.h \
  1135. malloc/malloc.h \
  1136. malloc_np.h \
  1137. netdb.h \
  1138. netinet/in.h \
  1139. netinet/in6.h \
  1140. pwd.h \
  1141. readpassphrase.h \
  1142. stdint.h \
  1143. stdatomic.h \
  1144. sys/eventfd.h \
  1145. sys/file.h \
  1146. sys/ioctl.h \
  1147. sys/limits.h \
  1148. sys/mman.h \
  1149. sys/param.h \
  1150. sys/prctl.h \
  1151. sys/random.h \
  1152. sys/resource.h \
  1153. sys/select.h \
  1154. sys/socket.h \
  1155. sys/statvfs.h \
  1156. sys/syscall.h \
  1157. sys/sysctl.h \
  1158. sys/syslimits.h \
  1159. sys/time.h \
  1160. sys/types.h \
  1161. sys/un.h \
  1162. sys/utime.h \
  1163. sys/wait.h \
  1164. syslog.h \
  1165. utime.h])
  1166. AC_CHECK_HEADERS(sys/param.h)
  1167. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1168. [#ifdef HAVE_SYS_TYPES_H
  1169. #include <sys/types.h>
  1170. #endif
  1171. #ifdef HAVE_SYS_SOCKET_H
  1172. #include <sys/socket.h>
  1173. #endif])
  1174. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1175. [#ifdef HAVE_SYS_TYPES_H
  1176. #include <sys/types.h>
  1177. #endif
  1178. #ifdef HAVE_SYS_SOCKET_H
  1179. #include <sys/socket.h>
  1180. #endif
  1181. #ifdef HAVE_NET_IF_H
  1182. #include <net/if.h>
  1183. #endif
  1184. #ifdef HAVE_NETINET_IN_H
  1185. #include <netinet/in.h>
  1186. #endif])
  1187. AC_CHECK_HEADERS(linux/if.h,[],[],
  1188. [
  1189. #ifdef HAVE_SYS_SOCKET_H
  1190. #include <sys/socket.h>
  1191. #endif
  1192. ])
  1193. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1194. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1195. [#ifdef HAVE_SYS_TYPES_H
  1196. #include <sys/types.h>
  1197. #endif
  1198. #ifdef HAVE_SYS_SOCKET_H
  1199. #include <sys/socket.h>
  1200. #endif
  1201. #ifdef HAVE_LIMITS_H
  1202. #include <limits.h>
  1203. #endif
  1204. #ifdef HAVE_LINUX_TYPES_H
  1205. #include <linux/types.h>
  1206. #endif
  1207. #ifdef HAVE_NETINET_IN6_H
  1208. #include <netinet/in6.h>
  1209. #endif
  1210. #ifdef HAVE_NETINET_IN_H
  1211. #include <netinet/in.h>
  1212. #endif])
  1213. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1214. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1215. [#ifdef HAVE_SYS_TYPES_H
  1216. #include <sys/types.h>
  1217. #endif
  1218. #ifdef HAVE_SYS_SOCKET_H
  1219. #include <sys/socket.h>
  1220. #endif
  1221. #ifdef HAVE_LIMITS_H
  1222. #include <limits.h>
  1223. #endif
  1224. #ifdef HAVE_LINUX_TYPES_H
  1225. #include <linux/types.h>
  1226. #endif
  1227. #ifdef HAVE_NETINET_IN6_H
  1228. #include <netinet/in6.h>
  1229. #endif
  1230. #ifdef HAVE_NETINET_IN_H
  1231. #include <netinet/in.h>
  1232. #endif
  1233. #ifdef HAVE_LINUX_IF_H
  1234. #include <linux/if.h>
  1235. #endif])
  1236. transparent_ok=0
  1237. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1238. transparent_ok=1
  1239. fi
  1240. if test "x$linux_netfilter_ipv4" = "x1"; then
  1241. transparent_ok=1
  1242. fi
  1243. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1244. transparent_ok=1
  1245. fi
  1246. if test "x$transparent_ok" = "x1"; then
  1247. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1248. else
  1249. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1250. fi
  1251. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1252. [#ifdef HAVE_SYS_TYPES_H
  1253. #include <sys/types.h>
  1254. #endif
  1255. #ifdef HAVE_SYS_TIME_H
  1256. #include <sys/time.h>
  1257. #endif])
  1258. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1259. dnl Watch out.
  1260. AC_CHECK_SIZEOF(int8_t)
  1261. AC_CHECK_SIZEOF(int16_t)
  1262. AC_CHECK_SIZEOF(int32_t)
  1263. AC_CHECK_SIZEOF(int64_t)
  1264. AC_CHECK_SIZEOF(uint8_t)
  1265. AC_CHECK_SIZEOF(uint16_t)
  1266. AC_CHECK_SIZEOF(uint32_t)
  1267. AC_CHECK_SIZEOF(uint64_t)
  1268. AC_CHECK_SIZEOF(intptr_t)
  1269. AC_CHECK_SIZEOF(uintptr_t)
  1270. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1271. AC_CHECK_SIZEOF(char)
  1272. AC_CHECK_SIZEOF(short)
  1273. AC_CHECK_SIZEOF(int)
  1274. AC_CHECK_SIZEOF(long)
  1275. AC_CHECK_SIZEOF(long long)
  1276. AC_CHECK_SIZEOF(__int64)
  1277. AC_CHECK_SIZEOF(void *)
  1278. AC_CHECK_SIZEOF(time_t)
  1279. AC_CHECK_SIZEOF(size_t)
  1280. AC_CHECK_SIZEOF(pid_t)
  1281. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1282. AC_PC_FROM_UCONTEXT([:])
  1283. dnl used to include sockaddr_storage, but everybody has that.
  1284. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1285. [#ifdef HAVE_SYS_TYPES_H
  1286. #include <sys/types.h>
  1287. #endif
  1288. #ifdef HAVE_NETINET_IN_H
  1289. #include <netinet/in.h>
  1290. #endif
  1291. #ifdef HAVE_NETINET_IN6_H
  1292. #include <netinet/in6.h>
  1293. #endif
  1294. #ifdef HAVE_SYS_SOCKET_H
  1295. #include <sys/socket.h>
  1296. #endif
  1297. #ifdef _WIN32
  1298. #define _WIN32_WINNT 0x0501
  1299. #define WIN32_LEAN_AND_MEAN
  1300. #include <winsock2.h>
  1301. #include <ws2tcpip.h>
  1302. #endif
  1303. ])
  1304. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1305. [#ifdef HAVE_SYS_TYPES_H
  1306. #include <sys/types.h>
  1307. #endif
  1308. #ifdef HAVE_NETINET_IN_H
  1309. #include <netinet/in.h>
  1310. #endif
  1311. #ifdef HAVE_NETINET_IN6_H
  1312. #include <netinet/in6.h>
  1313. #endif
  1314. #ifdef HAVE_SYS_SOCKET_H
  1315. #include <sys/socket.h>
  1316. #endif
  1317. #ifdef _WIN32
  1318. #define _WIN32_WINNT 0x0501
  1319. #define WIN32_LEAN_AND_MEAN
  1320. #include <winsock2.h>
  1321. #include <ws2tcpip.h>
  1322. #endif
  1323. ])
  1324. AC_CHECK_TYPES([rlim_t], , ,
  1325. [#ifdef HAVE_SYS_TYPES_H
  1326. #include <sys/types.h>
  1327. #endif
  1328. #ifdef HAVE_SYS_TIME_H
  1329. #include <sys/time.h>
  1330. #endif
  1331. #ifdef HAVE_SYS_RESOURCE_H
  1332. #include <sys/resource.h>
  1333. #endif
  1334. ])
  1335. AX_CHECK_SIGN([time_t],
  1336. [ : ],
  1337. [ : ], [
  1338. #ifdef HAVE_SYS_TYPES_H
  1339. #include <sys/types.h>
  1340. #endif
  1341. #ifdef HAVE_SYS_TIME_H
  1342. #include <sys/time.h>
  1343. #endif
  1344. #ifdef HAVE_TIME_H
  1345. #include <time.h>
  1346. #endif
  1347. ])
  1348. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1349. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1350. fi
  1351. AX_CHECK_SIGN([size_t],
  1352. [ tor_cv_size_t_signed=yes ],
  1353. [ tor_cv_size_t_signed=no ], [
  1354. #ifdef HAVE_SYS_TYPES_H
  1355. #include <sys/types.h>
  1356. #endif
  1357. ])
  1358. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1359. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1360. fi
  1361. AX_CHECK_SIGN([enum always],
  1362. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1363. [ : ], [
  1364. enum always { AAA, BBB, CCC };
  1365. ])
  1366. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1367. #ifdef HAVE_SYS_SOCKET_H
  1368. #include <sys/socket.h>
  1369. #endif
  1370. ])
  1371. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1372. AC_CHECK_SIZEOF(cell_t)
  1373. # Now make sure that NULL can be represented as zero bytes.
  1374. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1375. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1376. [[#include <stdlib.h>
  1377. #include <string.h>
  1378. #include <stdio.h>
  1379. #ifdef HAVE_STDDEF_H
  1380. #include <stddef.h>
  1381. #endif
  1382. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1383. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1384. [tor_cv_null_is_zero=yes],
  1385. [tor_cv_null_is_zero=no],
  1386. [tor_cv_null_is_zero=cross])])
  1387. if test "$tor_cv_null_is_zero" = "cross"; then
  1388. # Cross-compiling; let's hope that the target isn't raving mad.
  1389. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1390. fi
  1391. if test "$tor_cv_null_is_zero" != "no"; then
  1392. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1393. [Define to 1 iff memset(0) sets pointers to NULL])
  1394. fi
  1395. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1396. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1397. [[#include <stdlib.h>
  1398. #include <string.h>
  1399. #include <stdio.h>
  1400. #ifdef HAVE_STDDEF_H
  1401. #include <stddef.h>
  1402. #endif
  1403. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1404. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1405. [tor_cv_dbl0_is_zero=yes],
  1406. [tor_cv_dbl0_is_zero=no],
  1407. [tor_cv_dbl0_is_zero=cross])])
  1408. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1409. # Cross-compiling; let's hope that the target isn't raving mad.
  1410. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1411. fi
  1412. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1413. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1414. [Define to 1 iff memset(0) sets doubles to 0.0])
  1415. fi
  1416. # And what happens when we malloc zero?
  1417. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1418. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1419. [[#include <stdlib.h>
  1420. #include <string.h>
  1421. #include <stdio.h>
  1422. #ifdef HAVE_STDDEF_H
  1423. #include <stddef.h>
  1424. #endif
  1425. int main () { return malloc(0)?0:1; }]])],
  1426. [tor_cv_malloc_zero_works=yes],
  1427. [tor_cv_malloc_zero_works=no],
  1428. [tor_cv_malloc_zero_works=cross])])
  1429. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1430. # Cross-compiling; let's hope that the target isn't raving mad.
  1431. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1432. fi
  1433. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1434. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1435. [Define to 1 iff malloc(0) returns a pointer])
  1436. fi
  1437. # whether we seem to be in a 2s-complement world.
  1438. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1439. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1440. [[int main () { int problem = ((-99) != (~99)+1);
  1441. return problem ? 1 : 0; }]])],
  1442. [tor_cv_twos_complement=yes],
  1443. [tor_cv_twos_complement=no],
  1444. [tor_cv_twos_complement=cross])])
  1445. if test "$tor_cv_twos_complement" = "cross"; then
  1446. # Cross-compiling; let's hope that the target isn't raving mad.
  1447. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1448. fi
  1449. if test "$tor_cv_twos_complement" != "no"; then
  1450. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1451. [Define to 1 iff we represent negative integers with
  1452. two's complement])
  1453. fi
  1454. # What does shifting a negative value do?
  1455. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1456. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1457. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1458. [tor_cv_sign_extend=yes],
  1459. [tor_cv_sign_extend=no],
  1460. [tor_cv_sign_extend=cross])])
  1461. if test "$tor_cv_sign_extend" = "cross"; then
  1462. # Cross-compiling; let's hope that the target isn't raving mad.
  1463. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1464. fi
  1465. if test "$tor_cv_sign_extend" != "no"; then
  1466. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1467. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1468. fi
  1469. # Is uint8_t the same type as unsigned char?
  1470. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1471. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1472. #include <stdint.h>
  1473. extern uint8_t c;
  1474. unsigned char c;]])],
  1475. [tor_cv_uint8_uchar=yes],
  1476. [tor_cv_uint8_uchar=no],
  1477. [tor_cv_uint8_uchar=cross])])
  1478. if test "$tor_cv_uint8_uchar" = "cross"; then
  1479. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1480. fi
  1481. if test "$tor_cv_uint8_uchar" = "no"; then
  1482. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1483. fi
  1484. # Whether we should use the dmalloc memory allocation debugging library.
  1485. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1486. AC_ARG_WITH(dmalloc,
  1487. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1488. [if [[ "$withval" = "yes" ]]; then
  1489. dmalloc=1
  1490. AC_MSG_RESULT(yes)
  1491. else
  1492. dmalloc=1
  1493. AC_MSG_RESULT(no)
  1494. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1495. )
  1496. if [[ $dmalloc -eq 1 ]]; then
  1497. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1498. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1499. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1500. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1501. fi
  1502. AC_ARG_WITH(tcmalloc,
  1503. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1504. [ tcmalloc=yes ], [ tcmalloc=no ])
  1505. if test "x$tcmalloc" = "xyes"; then
  1506. LDFLAGS="-ltcmalloc $LDFLAGS"
  1507. fi
  1508. using_custom_malloc=no
  1509. if test "x$enable_openbsd_malloc" = "xyes"; then
  1510. using_custom_malloc=yes
  1511. fi
  1512. if test "x$tcmalloc" = "xyes"; then
  1513. using_custom_malloc=yes
  1514. fi
  1515. if test "$using_custom_malloc" = "no"; then
  1516. AC_CHECK_FUNCS(mallinfo)
  1517. fi
  1518. # By default, we're going to assume we don't have mlockall()
  1519. # bionic and other platforms have various broken mlockall subsystems.
  1520. # Some systems don't have a working mlockall, some aren't linkable,
  1521. # and some have it but don't declare it.
  1522. AC_CHECK_FUNCS(mlockall)
  1523. AC_CHECK_DECLS([mlockall], , , [
  1524. #ifdef HAVE_SYS_MMAN_H
  1525. #include <sys/mman.h>
  1526. #endif])
  1527. # Allow user to specify an alternate syslog facility
  1528. AC_ARG_WITH(syslog-facility,
  1529. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1530. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1531. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1532. AC_SUBST(LOGFACILITY)
  1533. # Check if we have getresuid and getresgid
  1534. AC_CHECK_FUNCS(getresuid getresgid)
  1535. # Check for gethostbyname_r in all its glorious incompatible versions.
  1536. # (This logic is based on that in Python's configure.in)
  1537. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1538. [Define this if you have any gethostbyname_r()])
  1539. AC_CHECK_FUNC(gethostbyname_r, [
  1540. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1541. OLD_CFLAGS=$CFLAGS
  1542. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1543. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1544. #include <netdb.h>
  1545. ]], [[
  1546. char *cp1, *cp2;
  1547. struct hostent *h1, *h2;
  1548. int i1, i2;
  1549. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1550. ]])],[
  1551. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1552. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1553. [Define this if gethostbyname_r takes 6 arguments])
  1554. AC_MSG_RESULT(6)
  1555. ], [
  1556. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1557. #include <netdb.h>
  1558. ]], [[
  1559. char *cp1, *cp2;
  1560. struct hostent *h1;
  1561. int i1, i2;
  1562. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1563. ]])], [
  1564. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1565. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1566. [Define this if gethostbyname_r takes 5 arguments])
  1567. AC_MSG_RESULT(5)
  1568. ], [
  1569. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1570. #include <netdb.h>
  1571. ]], [[
  1572. char *cp1;
  1573. struct hostent *h1;
  1574. struct hostent_data hd;
  1575. (void) gethostbyname_r(cp1,h1,&hd);
  1576. ]])], [
  1577. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1578. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1579. [Define this if gethostbyname_r takes 3 arguments])
  1580. AC_MSG_RESULT(3)
  1581. ], [
  1582. AC_MSG_RESULT(0)
  1583. ])
  1584. ])
  1585. ])
  1586. CFLAGS=$OLD_CFLAGS
  1587. ])
  1588. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1589. tor_cv_have_func_macro,
  1590. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1591. #include <stdio.h>
  1592. int main(int c, char **v) { puts(__func__); }])],
  1593. tor_cv_have_func_macro=yes,
  1594. tor_cv_have_func_macro=no))
  1595. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1596. tor_cv_have_FUNC_macro,
  1597. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1598. #include <stdio.h>
  1599. int main(int c, char **v) { puts(__FUNC__); }])],
  1600. tor_cv_have_FUNC_macro=yes,
  1601. tor_cv_have_FUNC_macro=no))
  1602. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1603. tor_cv_have_FUNCTION_macro,
  1604. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1605. #include <stdio.h>
  1606. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1607. tor_cv_have_FUNCTION_macro=yes,
  1608. tor_cv_have_FUNCTION_macro=no))
  1609. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1610. tor_cv_have_environ_declared,
  1611. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1612. #ifdef HAVE_UNISTD_H
  1613. #include <unistd.h>
  1614. #endif
  1615. #include <stdlib.h>
  1616. int main(int c, char **v) { char **t = environ; }])],
  1617. tor_cv_have_environ_declared=yes,
  1618. tor_cv_have_environ_declared=no))
  1619. if test "$tor_cv_have_func_macro" = "yes"; then
  1620. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1621. fi
  1622. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1623. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1624. fi
  1625. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1626. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1627. [Defined if the compiler supports __FUNCTION__])
  1628. fi
  1629. if test "$tor_cv_have_environ_declared" = "yes"; then
  1630. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1631. [Defined if we have extern char **environ already declared])
  1632. fi
  1633. # $prefix stores the value of the --prefix command line option, or
  1634. # NONE if the option wasn't set. In the case that it wasn't set, make
  1635. # it be the default, so that we can use it to expand directories now.
  1636. if test "x$prefix" = "xNONE"; then
  1637. prefix=$ac_default_prefix
  1638. fi
  1639. # and similarly for $exec_prefix
  1640. if test "x$exec_prefix" = "xNONE"; then
  1641. exec_prefix=$prefix
  1642. fi
  1643. if test "x$BUILDDIR" = "x"; then
  1644. BUILDDIR=`pwd`
  1645. fi
  1646. AC_SUBST(BUILDDIR)
  1647. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1648. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1649. if test "x$SRCDIR" = "x"; then
  1650. SRCDIR=$(cd "$srcdir"; pwd)
  1651. fi
  1652. AH_TEMPLATE([SRCDIR],[tor's sourcedir directory])
  1653. AC_DEFINE_UNQUOTED(SRCDIR,"$SRCDIR")
  1654. if test "x$CONFDIR" = "x"; then
  1655. CONFDIR=`eval echo $sysconfdir/tor`
  1656. fi
  1657. AC_SUBST(CONFDIR)
  1658. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1659. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1660. BINDIR=`eval echo $bindir`
  1661. AC_SUBST(BINDIR)
  1662. LOCALSTATEDIR=`eval echo $localstatedir`
  1663. AC_SUBST(LOCALSTATEDIR)
  1664. if test "$bwin32" = "true"; then
  1665. # Test if the linker supports the --nxcompat and --dynamicbase options
  1666. # for Windows
  1667. save_LDFLAGS="$LDFLAGS"
  1668. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1669. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1670. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1671. [AC_MSG_RESULT([yes])]
  1672. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1673. [AC_MSG_RESULT([no])]
  1674. )
  1675. LDFLAGS="$save_LDFLAGS"
  1676. fi
  1677. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1678. # than autoconf's macros like.
  1679. if test "$GCC" = "yes"; then
  1680. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1681. # accident waiting to happen.
  1682. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1683. else
  1684. # Override optimization level for non-gcc compilers
  1685. CFLAGS="$CFLAGS -O"
  1686. enable_gcc_warnings=no
  1687. enable_gcc_warnings_advisory=no
  1688. fi
  1689. # Warnings implies advisory-warnings and -Werror.
  1690. if test "$enable_gcc_warnings" = "yes"; then
  1691. enable_gcc_warnings_advisory=yes
  1692. enable_fatal_warnings=yes
  1693. fi
  1694. # OS X Lion started deprecating the system openssl. Let's just disable
  1695. # all deprecation warnings on OS X. Also, to potentially make the binary
  1696. # a little smaller, let's enable dead_strip.
  1697. case "$host_os" in
  1698. darwin*)
  1699. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1700. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1701. esac
  1702. # Add some more warnings which we use in development but not in the
  1703. # released versions. (Some relevant gcc versions can't handle these.)
  1704. #
  1705. # Note that we have to do this near the end of the autoconf process, or
  1706. # else we may run into problems when these warnings hit on the testing C
  1707. # programs that autoconf wants to build.
  1708. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1709. case "$host" in
  1710. *-*-openbsd* | *-*-bitrig*)
  1711. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1712. # That's fine, except that the headers don't pass -Wredundant-decls.
  1713. # Therefore, let's disable -Wsystem-headers when we're building
  1714. # with maximal warnings on OpenBSD.
  1715. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1716. esac
  1717. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1718. # have it work better.
  1719. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1720. # This warning was added in gcc 4.3, but it appears to generate
  1721. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1722. #CFLAGS="$CFLAGS -Wlogical-op"
  1723. m4_foreach_w([warning_flag], [
  1724. -Waddress
  1725. -Waddress-of-array-temporary
  1726. -Waddress-of-temporary
  1727. -Wambiguous-macro
  1728. -Wanonymous-pack-parens
  1729. -Warc
  1730. -Warc-abi
  1731. -Warc-bridge-casts-disallowed-in-nonarc
  1732. -Warc-maybe-repeated-use-of-weak
  1733. -Warc-performSelector-leaks
  1734. -Warc-repeated-use-of-weak
  1735. -Warray-bounds
  1736. -Warray-bounds-pointer-arithmetic
  1737. -Wasm
  1738. -Wasm-operand-widths
  1739. -Watomic-properties
  1740. -Watomic-property-with-user-defined-accessor
  1741. -Wauto-import
  1742. -Wauto-storage-class
  1743. -Wauto-var-id
  1744. -Wavailability
  1745. -Wbackslash-newline-escape
  1746. -Wbad-array-new-length
  1747. -Wbind-to-temporary-copy
  1748. -Wbitfield-constant-conversion
  1749. -Wbool-conversion
  1750. -Wbool-conversions
  1751. -Wbuiltin-requires-header
  1752. -Wchar-align
  1753. -Wcompare-distinct-pointer-types
  1754. -Wcomplex-component-init
  1755. -Wconditional-type-mismatch
  1756. -Wconfig-macros
  1757. -Wconstant-conversion
  1758. -Wconstant-logical-operand
  1759. -Wconstexpr-not-const
  1760. -Wcustom-atomic-properties
  1761. -Wdangling-field
  1762. -Wdangling-initializer-list
  1763. -Wdate-time
  1764. -Wdelegating-ctor-cycles
  1765. -Wdeprecated-implementations
  1766. -Wdeprecated-register
  1767. -Wdirect-ivar-access
  1768. -Wdiscard-qual
  1769. -Wdistributed-object-modifiers
  1770. -Wdivision-by-zero
  1771. -Wdollar-in-identifier-extension
  1772. -Wdouble-promotion
  1773. -Wduplicate-decl-specifier
  1774. -Wduplicate-enum
  1775. -Wduplicate-method-arg
  1776. -Wduplicate-method-match
  1777. -Wduplicated-cond
  1778. -Wdynamic-class-memaccess
  1779. -Wembedded-directive
  1780. -Wempty-translation-unit
  1781. -Wenum-conversion
  1782. -Wexit-time-destructors
  1783. -Wexplicit-ownership-type
  1784. -Wextern-initializer
  1785. -Wextra
  1786. -Wextra-semi
  1787. -Wextra-tokens
  1788. -Wflexible-array-extensions
  1789. -Wfloat-conversion
  1790. -Wformat-non-iso
  1791. -Wfour-char-constants
  1792. -Wgcc-compat
  1793. -Wglobal-constructors
  1794. -Wgnu-array-member-paren-init
  1795. -Wgnu-designator
  1796. -Wgnu-static-float-init
  1797. -Wheader-guard
  1798. -Wheader-hygiene
  1799. -Widiomatic-parentheses
  1800. -Wignored-attributes
  1801. -Wimplicit-atomic-properties
  1802. -Wimplicit-conversion-floating-point-to-bool
  1803. -Wimplicit-exception-spec-mismatch
  1804. -Wimplicit-fallthrough
  1805. -Wimplicit-fallthrough-per-function
  1806. -Wimplicit-retain-self
  1807. -Wimport-preprocessor-directive-pedantic
  1808. -Wincompatible-library-redeclaration
  1809. -Wincompatible-pointer-types-discards-qualifiers
  1810. -Wincomplete-implementation
  1811. -Wincomplete-module
  1812. -Wincomplete-umbrella
  1813. -Winit-self
  1814. -Wint-conversions
  1815. -Wint-to-void-pointer-cast
  1816. -Winteger-overflow
  1817. -Winvalid-constexpr
  1818. -Winvalid-iboutlet
  1819. -Winvalid-noreturn
  1820. -Winvalid-pp-token
  1821. -Winvalid-source-encoding
  1822. -Winvalid-token-paste
  1823. -Wknr-promoted-parameter
  1824. -Wlarge-by-value-copy
  1825. -Wliteral-conversion
  1826. -Wliteral-range
  1827. -Wlocal-type-template-args
  1828. -Wlogical-op
  1829. -Wloop-analysis
  1830. -Wmain-return-type
  1831. -Wmalformed-warning-check
  1832. -Wmethod-signatures
  1833. -Wmicrosoft
  1834. -Wmicrosoft-exists
  1835. -Wmismatched-parameter-types
  1836. -Wmismatched-return-types
  1837. -Wmissing-field-initializers
  1838. -Wmissing-format-attribute
  1839. -Wmissing-noreturn
  1840. -Wmissing-selector-name
  1841. -Wmissing-sysroot
  1842. -Wmissing-variable-declarations
  1843. -Wmodule-conflict
  1844. -Wnested-anon-types
  1845. -Wnewline-eof
  1846. -Wnon-literal-null-conversion
  1847. -Wnon-pod-varargs
  1848. -Wnonportable-cfstrings
  1849. -Wnormalized=nfkc
  1850. -Wnull-arithmetic
  1851. -Wnull-character
  1852. -Wnull-conversion
  1853. -Wnull-dereference
  1854. -Wout-of-line-declaration
  1855. -Wover-aligned
  1856. -Woverlength-strings
  1857. -Woverride-init
  1858. -Woverriding-method-mismatch
  1859. -Wpointer-type-mismatch
  1860. -Wpredefined-identifier-outside-function
  1861. -Wprotocol-property-synthesis-ambiguity
  1862. -Wreadonly-iboutlet-property
  1863. -Wreadonly-setter-attrs
  1864. -Wreceiver-expr
  1865. -Wreceiver-forward-class
  1866. -Wreceiver-is-weak
  1867. -Wreinterpret-base-class
  1868. -Wrequires-super-attribute
  1869. -Wreserved-user-defined-literal
  1870. -Wreturn-stack-address
  1871. -Wsection
  1872. -Wselector-type-mismatch
  1873. -Wsentinel
  1874. -Wserialized-diagnostics
  1875. -Wshadow
  1876. -Wshift-count-negative
  1877. -Wshift-count-overflow
  1878. -Wshift-negative-value
  1879. -Wshift-overflow=2
  1880. -Wshift-sign-overflow
  1881. -Wshorten-64-to-32
  1882. -Wsizeof-array-argument
  1883. -Wsource-uses-openmp
  1884. -Wstatic-float-init
  1885. -Wstatic-in-inline
  1886. -Wstatic-local-in-inline
  1887. -Wstrict-overflow=1
  1888. -Wstring-compare
  1889. -Wstring-conversion
  1890. -Wstrlcpy-strlcat-size
  1891. -Wstrncat-size
  1892. -Wsuggest-attribute=format
  1893. -Wsuggest-attribute=noreturn
  1894. -Wsuper-class-method-mismatch
  1895. -Wswitch-bool
  1896. -Wsync-nand
  1897. -Wtautological-constant-out-of-range-compare
  1898. -Wtentative-definition-incomplete-type
  1899. -Wtrampolines
  1900. -Wtype-safety
  1901. -Wtypedef-redefinition
  1902. -Wtypename-missing
  1903. -Wundefined-inline
  1904. -Wundefined-internal
  1905. -Wundefined-reinterpret-cast
  1906. -Wunicode
  1907. -Wunicode-whitespace
  1908. -Wunknown-warning-option
  1909. -Wunnamed-type-template-args
  1910. -Wunneeded-member-function
  1911. -Wunsequenced
  1912. -Wunsupported-visibility
  1913. -Wunused-but-set-parameter
  1914. -Wunused-but-set-variable
  1915. -Wunused-command-line-argument
  1916. -Wunused-const-variable=2
  1917. -Wunused-exception-parameter
  1918. -Wunused-local-typedefs
  1919. -Wunused-member-function
  1920. -Wunused-sanitize-argument
  1921. -Wunused-volatile-lvalue
  1922. -Wuser-defined-literals
  1923. -Wvariadic-macros
  1924. -Wvector-conversion
  1925. -Wvector-conversions
  1926. -Wvexing-parse
  1927. -Wvisibility
  1928. -Wvla-extension
  1929. -Wzero-length-array
  1930. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1931. dnl We should re-enable this in some later version. Clang doesn't
  1932. dnl mind, but it causes trouble with GCC.
  1933. dnl -Wstrict-overflow=2
  1934. dnl These seem to require annotations that we don't currently use,
  1935. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1936. dnl -Wthread-safety
  1937. dnl -Wthread-safety-analysis
  1938. dnl -Wthread-safety-attributes
  1939. dnl -Wthread-safety-beta
  1940. dnl -Wthread-safety-precise
  1941. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1942. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1943. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1944. CFLAGS="$CFLAGS -Wwrite-strings"
  1945. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1946. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1947. CFLAGS="$CFLAGS -Wunused-parameter "
  1948. # These interfere with building main() { return 0; }, which autoconf
  1949. # likes to use as its default program.
  1950. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1951. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1952. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1953. fi
  1954. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1955. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1956. fi
  1957. if test "x$enable_fatal_warnings" = "xyes"; then
  1958. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1959. # default autoconf programs are full of errors.
  1960. CFLAGS="$CFLAGS -Werror"
  1961. fi
  1962. fi
  1963. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1964. case "$host_os" in
  1965. darwin*)
  1966. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1967. esac
  1968. fi
  1969. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1970. AC_CONFIG_FILES([
  1971. Doxyfile
  1972. Makefile
  1973. contrib/dist/suse/tor.sh
  1974. contrib/operator-tools/tor.logrotate
  1975. contrib/dist/tor.sh
  1976. contrib/dist/torctl
  1977. contrib/dist/tor.service
  1978. src/config/torrc.sample
  1979. src/config/torrc.minimal
  1980. src/rust/.cargo/config
  1981. scripts/maint/checkOptionDocs.pl
  1982. scripts/maint/updateVersions.pl
  1983. ])
  1984. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1985. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1986. for file in $regular_mans ; do
  1987. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1988. echo "==================================";
  1989. echo;
  1990. echo "Building Tor has failed since manpages cannot be built.";
  1991. echo;
  1992. echo "You need asciidoc installed to be able to build the manpages.";
  1993. echo "To build without manpages, use the --disable-asciidoc argument";
  1994. echo "when calling configure.";
  1995. echo;
  1996. echo "==================================";
  1997. exit 1;
  1998. fi
  1999. done
  2000. fi
  2001. if test "$fragile_hardening" = "yes"; then
  2002. AC_MSG_WARN([
  2003. ============
  2004. Warning! Building Tor with --enable-fragile-hardening (also known as
  2005. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  2006. other kinds of attacks easier. A Tor instance build with this option will be
  2007. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  2008. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  2009. denial of service attacks. For more information, see
  2010. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  2011. ============
  2012. ])
  2013. fi
  2014. AC_OUTPUT