configure.ac 73 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],[0.3.3.11-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. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  57. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  58. fi
  59. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  60. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  61. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  62. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  63. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  64. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  65. if test "$enable_static_tor" = "yes"; then
  66. enable_static_libevent="yes";
  67. enable_static_openssl="yes";
  68. enable_static_zlib="yes";
  69. CFLAGS="$CFLAGS -static"
  70. fi
  71. if test "$enable_system_torrc" = "no"; then
  72. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  73. [Defined if we're not going to look for a torrc in SYSCONF])
  74. fi
  75. if test "$enable_memory_sentinels" = "no"; then
  76. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  77. [Defined if we're turning off memory safety code to look for bugs])
  78. fi
  79. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  80. AC_ARG_ENABLE(asciidoc,
  81. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  82. [case "${enableval}" in
  83. "yes") asciidoc=true ;;
  84. "no") asciidoc=false ;;
  85. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  86. esac], [asciidoc=true])
  87. # systemd notify support
  88. AC_ARG_ENABLE(systemd,
  89. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  90. [case "${enableval}" in
  91. "yes") systemd=true ;;
  92. "no") systemd=false ;;
  93. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  94. esac], [systemd=auto])
  95. if test "$enable_restart_debugging" = "yes"; then
  96. AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
  97. [Defined if we're building with support for in-process restart debugging.])
  98. fi
  99. # systemd support
  100. if test "x$enable_systemd" = "xno"; then
  101. have_systemd=no;
  102. else
  103. PKG_CHECK_MODULES(SYSTEMD,
  104. [libsystemd-daemon],
  105. have_systemd=yes,
  106. have_systemd=no)
  107. if test "x$have_systemd" = "xno"; then
  108. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  109. PKG_CHECK_MODULES(SYSTEMD,
  110. [libsystemd],
  111. have_systemd=yes,
  112. have_systemd=no)
  113. fi
  114. fi
  115. if test "x$have_systemd" = "xyes"; then
  116. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  117. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  118. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  119. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  120. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  121. fi
  122. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  123. AC_SUBST(TOR_SYSTEMD_LIBS)
  124. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  125. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  126. fi
  127. case "$host" in
  128. *-*-solaris* )
  129. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  130. ;;
  131. esac
  132. AC_ARG_ENABLE(gcc-warnings,
  133. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  134. AC_ARG_ENABLE(fatal-warnings,
  135. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  136. AC_ARG_ENABLE(gcc-warnings-advisory,
  137. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  138. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  139. AC_ARG_ENABLE(gcc-hardening,
  140. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  141. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  142. AC_ARG_ENABLE(expensive-hardening,
  143. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  144. AC_ARG_ENABLE(fragile-hardening,
  145. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  146. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  147. fragile_hardening="yes"
  148. fi
  149. dnl Linker hardening options
  150. dnl Currently these options are ELF specific - you can't use this with MacOSX
  151. AC_ARG_ENABLE(linker-hardening,
  152. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  153. AC_ARG_ENABLE(local-appdata,
  154. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  155. if test "$enable_local_appdata" = "yes"; then
  156. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  157. [Defined if we default to host local appdata paths on Windows])
  158. fi
  159. # Tor2web mode flag
  160. AC_ARG_ENABLE(tor2web-mode,
  161. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  162. [if test "x$enableval" = "xyes"; then
  163. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  164. fi])
  165. AC_ARG_ENABLE(tool-name-check,
  166. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  167. AC_ARG_ENABLE(seccomp,
  168. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  169. AC_ARG_ENABLE(libscrypt,
  170. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  171. dnl Enable event tracing which are transformed to debug log statement.
  172. AC_ARG_ENABLE(event-tracing-debug,
  173. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  174. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  175. if test x$enable_event_tracing_debug = xyes; then
  176. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  177. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  178. fi
  179. dnl Enable Android only features.
  180. AC_ARG_ENABLE(android,
  181. AS_HELP_STRING(--enable-android, [build with Android features enabled]))
  182. AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
  183. if test "x$enable_android" = "xyes"; then
  184. AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
  185. dnl Check if the Android log library is available.
  186. AC_CHECK_HEADERS([android/log.h])
  187. AC_SEARCH_LIBS(__android_log_write, [log])
  188. fi
  189. dnl check for the correct "ar" when cross-compiling.
  190. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  191. dnl so kludge up a replacement for the case where it isn't there yet.)
  192. m4_ifdef([AM_PROG_AR],
  193. [AM_PROG_AR],
  194. [AN_MAKEVAR([AR], [AC_PROG_AR])
  195. AN_PROGRAM([ar], [AC_PROG_AR])
  196. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  197. AC_PROG_AR])
  198. dnl Check whether the above macro has settled for a simply named tool even
  199. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  200. dnl because that will find any cc on the system, not only the cross-compiler,
  201. dnl and then verify that a binary built with this compiler runs on the
  202. dnl build system. It will then come to the false conclusion that we're not
  203. dnl cross-compiling.
  204. if test "x$enable_tool_name_check" != "xno"; then
  205. if test "x$ac_tool_warned" = "xyes"; then
  206. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  207. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  208. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  209. fi
  210. fi
  211. AC_PROG_CC
  212. AC_PROG_CPP
  213. AC_PROG_MAKE_SET
  214. AC_PROG_RANLIB
  215. AC_PROG_SED
  216. AC_ARG_VAR([PERL], [path to Perl binary])
  217. AC_CHECK_PROGS([PERL], [perl])
  218. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  219. dnl check for asciidoc and a2x
  220. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  221. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  222. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  223. AM_PROG_CC_C_O
  224. AC_PROG_CC_C99
  225. AC_ARG_VAR([PYTHON], [path to Python binary])
  226. AC_CHECK_PROGS(PYTHON, [ \
  227. python3 \
  228. python3.8 python3.7 python3.6 python3.5 python3.4 \
  229. python \
  230. python2 python2.7])
  231. if test "x$PYTHON" = "x"; then
  232. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  233. fi
  234. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  235. dnl List all external rust crates we depend on here. Include the version
  236. rust_crates="libc-0.2.39"
  237. AC_SUBST(rust_crates)
  238. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  239. AC_C_FLEXIBLE_ARRAY_MEMBER
  240. ], [
  241. dnl Maybe we've got an old autoconf...
  242. AC_CACHE_CHECK([for flexible array members],
  243. tor_cv_c_flexarray,
  244. [AC_COMPILE_IFELSE(
  245. AC_LANG_PROGRAM([
  246. struct abc { int a; char b[]; };
  247. ], [
  248. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  249. def->b[0] = 33;
  250. ]),
  251. [tor_cv_c_flexarray=yes],
  252. [tor_cv_c_flexarray=no])])
  253. if test "$tor_cv_flexarray" = "yes"; then
  254. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  255. else
  256. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  257. fi
  258. ])
  259. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  260. tor_cv_c_c99_decl,
  261. [AC_COMPILE_IFELSE(
  262. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  263. [tor_cv_c_c99_decl=yes],
  264. [tor_cv_c_c99_decl=no] )])
  265. if test "$tor_cv_c_c99_decl" != "yes"; then
  266. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  267. fi
  268. AC_CACHE_CHECK([for working C99 designated initializers],
  269. tor_cv_c_c99_designated_init,
  270. [AC_COMPILE_IFELSE(
  271. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  272. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  273. [tor_cv_c_c99_designated_init=yes],
  274. [tor_cv_c_c99_designated_init=no] )])
  275. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  276. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  277. fi
  278. TORUSER=_tor
  279. AC_ARG_WITH(tor-user,
  280. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  281. [
  282. TORUSER=$withval
  283. ]
  284. )
  285. AC_SUBST(TORUSER)
  286. TORGROUP=_tor
  287. AC_ARG_WITH(tor-group,
  288. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  289. [
  290. TORGROUP=$withval
  291. ]
  292. )
  293. AC_SUBST(TORGROUP)
  294. dnl If _WIN32 is defined and non-zero, we are building for win32
  295. AC_MSG_CHECKING([for win32])
  296. AC_RUN_IFELSE([AC_LANG_SOURCE([
  297. int main(int c, char **v) {
  298. #ifdef _WIN32
  299. #if _WIN32
  300. return 0;
  301. #else
  302. return 1;
  303. #endif
  304. #else
  305. return 2;
  306. #endif
  307. }])],
  308. bwin32=true; AC_MSG_RESULT([yes]),
  309. bwin32=false; AC_MSG_RESULT([no]),
  310. bwin32=cross; AC_MSG_RESULT([cross])
  311. )
  312. if test "$bwin32" = "cross"; then
  313. AC_MSG_CHECKING([for win32 (cross)])
  314. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  315. #ifdef _WIN32
  316. int main(int c, char **v) {return 0;}
  317. #else
  318. #error
  319. int main(int c, char **v) {return x(y);}
  320. #endif
  321. ])],
  322. bwin32=true; AC_MSG_RESULT([yes]),
  323. bwin32=false; AC_MSG_RESULT([no]))
  324. fi
  325. AH_BOTTOM([
  326. #ifdef _WIN32
  327. /* Defined to access windows functions and definitions for >=WinXP */
  328. # ifndef WINVER
  329. # define WINVER 0x0501
  330. # endif
  331. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  332. # ifndef _WIN32_WINNT
  333. # define _WIN32_WINNT 0x0501
  334. # endif
  335. /* Defined to avoid including some windows headers as part of Windows.h */
  336. # ifndef WIN32_LEAN_AND_MEAN
  337. # define WIN32_LEAN_AND_MEAN 1
  338. # endif
  339. #endif
  340. ])
  341. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  342. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  343. dnl Enable C99 when compiling with MIPSpro
  344. AC_MSG_CHECKING([for MIPSpro compiler])
  345. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  346. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  347. #error
  348. return x(y);
  349. #endif
  350. ])],
  351. bmipspro=false; AC_MSG_RESULT(no),
  352. bmipspro=true; AC_MSG_RESULT(yes))
  353. if test "$bmipspro" = "true"; then
  354. CFLAGS="$CFLAGS -c99"
  355. fi
  356. AC_C_BIGENDIAN
  357. if test "x$enable_rust" = "xyes"; then
  358. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  359. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  360. if test "x$RUSTC" = "xno"; then
  361. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  362. fi
  363. AC_ARG_VAR([CARGO], [path to the cargo binary])
  364. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  365. if test "x$CARGO" = "xno"; then
  366. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  367. fi
  368. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  369. if test "x$enable_cargo_online_mode" = "xyes"; then
  370. CARGO_ONLINE=
  371. RUST_DL=#
  372. else
  373. CARGO_ONLINE=--frozen
  374. RUST_DL=
  375. dnl When we're not allowed to touch the network, we need crate dependencies
  376. dnl locally available.
  377. AC_MSG_CHECKING([rust crate dependencies])
  378. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  379. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  380. TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
  381. fi
  382. dnl Check whether the path exists before we try to cd into it.
  383. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  384. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  385. ERRORED=1
  386. fi
  387. dnl Make the path absolute, since we'll be using it from within a
  388. dnl subdirectory.
  389. TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
  390. for dep in $rust_crates; do
  391. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  392. 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.])
  393. ERRORED=1
  394. fi
  395. done
  396. if test "x$ERRORED" = "x"; then
  397. AC_MSG_RESULT([yes])
  398. fi
  399. fi
  400. dnl This is a workaround for #46797
  401. dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ). Once the
  402. dnl upstream bug is fixed, we can remove this workaround.
  403. case "$host_os" in
  404. darwin*)
  405. TOR_RUST_EXTRA_LIBS="-lresolv"
  406. ;;
  407. esac
  408. dnl For now both MSVC and MinGW rust libraries will output static libs with
  409. dnl the MSVC naming convention.
  410. if test "$bwin32" = "true"; then
  411. TOR_RUST_STATIC_NAME=tor_rust.lib
  412. else
  413. TOR_RUST_STATIC_NAME=libtor_rust.a
  414. fi
  415. AC_SUBST(TOR_RUST_STATIC_NAME)
  416. AC_SUBST(CARGO_ONLINE)
  417. AC_SUBST(RUST_DL)
  418. dnl Let's check the rustc version, too
  419. AC_MSG_CHECKING([rust version])
  420. RUSTC_VERSION=`$RUSTC --version`
  421. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  422. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  423. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  424. AC_MSG_ERROR([rustc version couldn't be identified])
  425. fi
  426. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  427. AC_MSG_ERROR([rustc must be at least version 1.14])
  428. fi
  429. AC_MSG_RESULT([$RUSTC_VERSION])
  430. fi
  431. AC_SUBST(TOR_RUST_EXTRA_LIBS)
  432. AC_SEARCH_LIBS(socket, [socket network])
  433. AC_SEARCH_LIBS(gethostbyname, [nsl])
  434. AC_SEARCH_LIBS(dlopen, [dl])
  435. AC_SEARCH_LIBS(inet_aton, [resolv])
  436. AC_SEARCH_LIBS(backtrace, [execinfo])
  437. saved_LIBS="$LIBS"
  438. AC_SEARCH_LIBS([clock_gettime], [rt])
  439. if test "$LIBS" != "$saved_LIBS"; then
  440. # Looks like we need -lrt for clock_gettime().
  441. have_rt=yes
  442. fi
  443. if test "$bwin32" = "false"; then
  444. AC_SEARCH_LIBS(pthread_create, [pthread])
  445. AC_SEARCH_LIBS(pthread_detach, [pthread])
  446. fi
  447. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  448. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  449. AC_CHECK_FUNCS(
  450. _NSGetEnviron \
  451. RtlSecureZeroMemory \
  452. SecureZeroMemory \
  453. accept4 \
  454. backtrace \
  455. backtrace_symbols_fd \
  456. eventfd \
  457. explicit_bzero \
  458. timingsafe_memcmp \
  459. flock \
  460. ftime \
  461. get_current_dir_name \
  462. getaddrinfo \
  463. getifaddrs \
  464. getpass \
  465. getrlimit \
  466. gettimeofday \
  467. gmtime_r \
  468. gnu_get_libc_version \
  469. htonll \
  470. inet_aton \
  471. ioctl \
  472. issetugid \
  473. llround \
  474. localtime_r \
  475. lround \
  476. memmem \
  477. memset_s \
  478. pipe \
  479. pipe2 \
  480. prctl \
  481. readpassphrase \
  482. rint \
  483. sigaction \
  484. socketpair \
  485. statvfs \
  486. strlcat \
  487. strlcpy \
  488. strnlen \
  489. strptime \
  490. strtok_r \
  491. strtoull \
  492. sysconf \
  493. sysctl \
  494. truncate \
  495. uname \
  496. usleep \
  497. vasprintf \
  498. _vscprintf
  499. )
  500. # Apple messed up when they added some functions: they
  501. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  502. # checks.
  503. # We should only probe for these functions if we are sure that we
  504. # are not targeting OS X 10.9 or earlier.
  505. AC_MSG_CHECKING([for a pre-Yosemite OS X build target])
  506. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  507. #ifdef __APPLE__
  508. # include <AvailabilityMacros.h>
  509. # ifndef MAC_OS_X_VERSION_10_10
  510. # define MAC_OS_X_VERSION_10_10 101000
  511. # endif
  512. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  513. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
  514. # error "Running on Mac OS X 10.9 or earlier"
  515. # endif
  516. # endif
  517. #endif
  518. ]], [[]])],
  519. [on_macos_pre_10_10=no ; AC_MSG_RESULT([no])],
  520. [on_macos_pre_10_10=yes; AC_MSG_RESULT([yes])])
  521. if test "$on_macos_pre_10_10" = "no"; then
  522. AC_CHECK_FUNCS(
  523. mach_approximate_time \
  524. )
  525. fi
  526. # We should only probe for these functions if we are sure that we
  527. # are not targeting OSX 10.11 or earlier.
  528. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  529. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  530. #ifdef __APPLE__
  531. # include <AvailabilityMacros.h>
  532. # ifndef MAC_OS_X_VERSION_10_12
  533. # define MAC_OS_X_VERSION_10_12 101200
  534. # endif
  535. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  536. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  537. # error "Running on Mac OSX 10.11 or earlier"
  538. # endif
  539. # endif
  540. #endif
  541. ]], [[]])],
  542. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  543. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  544. if test "$on_macos_pre_10_12" = "no"; then
  545. AC_CHECK_FUNCS(
  546. clock_gettime \
  547. getentropy \
  548. )
  549. fi
  550. if test "$bwin32" != "true"; then
  551. AC_CHECK_HEADERS(pthread.h)
  552. AC_CHECK_FUNCS(pthread_create)
  553. AC_CHECK_FUNCS(pthread_condattr_setclock)
  554. fi
  555. if test "$bwin32" = "true"; then
  556. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  557. #include <windows.h>
  558. #include <conio.h>
  559. #include <wchar.h>
  560. ])
  561. fi
  562. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  563. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  564. dnl ------------------------------------------------------
  565. dnl Where do you live, libevent? And how do we call you?
  566. if test "$bwin32" = "true"; then
  567. TOR_LIB_WS32=-lws2_32
  568. TOR_LIB_IPHLPAPI=-liphlpapi
  569. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  570. # think it's actually necessary.
  571. TOR_LIB_GDI=-lgdi32
  572. TOR_LIB_USERENV=-luserenv
  573. else
  574. TOR_LIB_WS32=
  575. TOR_LIB_GDI=
  576. TOR_LIB_USERENV=
  577. fi
  578. AC_SUBST(TOR_LIB_WS32)
  579. AC_SUBST(TOR_LIB_GDI)
  580. AC_SUBST(TOR_LIB_IPHLPAPI)
  581. AC_SUBST(TOR_LIB_USERENV)
  582. tor_libevent_pkg_redhat="libevent"
  583. tor_libevent_pkg_debian="libevent-dev"
  584. tor_libevent_devpkg_redhat="libevent-devel"
  585. tor_libevent_devpkg_debian="libevent-dev"
  586. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  587. dnl linking for static builds.
  588. STATIC_LIBEVENT_FLAGS=""
  589. if test "$enable_static_libevent" = "yes"; then
  590. if test "$have_rt" = "yes"; then
  591. STATIC_LIBEVENT_FLAGS=" -lrt "
  592. fi
  593. fi
  594. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  595. #ifdef _WIN32
  596. #include <winsock2.h>
  597. #endif
  598. #include <sys/time.h>
  599. #include <sys/types.h>
  600. #include <event2/event.h>], [
  601. #ifdef _WIN32
  602. #include <winsock2.h>
  603. #endif
  604. struct event_base;
  605. struct event_base *event_base_new(void);
  606. void event_base_free(struct event_base *);],
  607. [
  608. #ifdef _WIN32
  609. {WSADATA d; WSAStartup(0x101,&d); }
  610. #endif
  611. event_base_free(event_base_new());
  612. ], [--with-libevent-dir], [/opt/libevent])
  613. dnl Determine the incantation needed to link libevent.
  614. save_LIBS="$LIBS"
  615. save_LDFLAGS="$LDFLAGS"
  616. save_CPPFLAGS="$CPPFLAGS"
  617. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  618. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  619. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  620. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  621. if test "$enable_static_libevent" = "yes"; then
  622. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  623. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  624. else
  625. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  626. fi
  627. else
  628. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  629. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  630. 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"))
  631. if test "$ac_cv_search_event_new" != "none required"; then
  632. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  633. fi
  634. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  635. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  636. fi
  637. else
  638. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  639. fi
  640. fi
  641. dnl Now check for particular libevent functions.
  642. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  643. evutil_secure_rng_add_bytes \
  644. ])
  645. LIBS="$save_LIBS"
  646. LDFLAGS="$save_LDFLAGS"
  647. CPPFLAGS="$save_CPPFLAGS"
  648. dnl Check that libevent is at least at version 2.0.10, the first stable
  649. dnl release of its series
  650. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  651. AC_MSG_CHECKING([whether Libevent is new enough])
  652. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  653. #include <event2/event.h>
  654. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  655. #error
  656. int x = y(zz);
  657. #else
  658. int x = 1;
  659. #endif
  660. ])], [ AC_MSG_RESULT([yes]) ],
  661. [ AC_MSG_RESULT([no])
  662. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  663. LIBS="$save_LIBS"
  664. LDFLAGS="$save_LDFLAGS"
  665. CPPFLAGS="$save_CPPFLAGS"
  666. AC_SUBST(TOR_LIBEVENT_LIBS)
  667. dnl ------------------------------------------------------
  668. dnl Where do you live, libm?
  669. dnl On some platforms (Haiku/BeOS) the math library is
  670. dnl part of libroot. In which case don't link against lm
  671. TOR_LIB_MATH=""
  672. save_LIBS="$LIBS"
  673. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  674. if test "$ac_cv_search_pow" != "none required"; then
  675. TOR_LIB_MATH="$ac_cv_search_pow"
  676. fi
  677. LIBS="$save_LIBS"
  678. AC_SUBST(TOR_LIB_MATH)
  679. dnl ------------------------------------------------------
  680. dnl Where do you live, openssl? And how do we call you?
  681. tor_openssl_pkg_redhat="openssl"
  682. tor_openssl_pkg_debian="libssl-dev"
  683. tor_openssl_devpkg_redhat="openssl-devel"
  684. tor_openssl_devpkg_debian="libssl-dev"
  685. ALT_openssl_WITHVAL=""
  686. AC_ARG_WITH(ssl-dir,
  687. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  688. [
  689. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  690. ALT_openssl_WITHVAL="$withval"
  691. fi
  692. ])
  693. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  694. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  695. [#include <openssl/ssl.h>],
  696. [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
  697. [TLSv1_1_method();], [],
  698. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  699. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  700. if test "$enable_static_openssl" = "yes"; then
  701. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  702. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  703. else
  704. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  705. fi
  706. else
  707. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  708. fi
  709. AC_SUBST(TOR_OPENSSL_LIBS)
  710. dnl Now check for particular openssl functions.
  711. save_LIBS="$LIBS"
  712. save_LDFLAGS="$LDFLAGS"
  713. save_CPPFLAGS="$CPPFLAGS"
  714. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  715. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  716. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  717. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  718. #include <openssl/opensslv.h>
  719. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  720. #error "too old"
  721. #endif
  722. ]], [[]])],
  723. [ : ],
  724. [ 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.]) ])
  725. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  726. #include <openssl/opensslv.h>
  727. #include <openssl/evp.h>
  728. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  729. #error "no ECC"
  730. #endif
  731. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  732. #error "curves unavailable"
  733. #endif
  734. ]], [[]])],
  735. [ : ],
  736. [ 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.]) ])
  737. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  738. [#include <openssl/ssl.h>
  739. ])
  740. AC_CHECK_FUNCS([ \
  741. SSL_SESSION_get_master_key \
  742. SSL_get_server_random \
  743. SSL_get_client_ciphers \
  744. SSL_get_client_random \
  745. SSL_CTX_set1_groups_list \
  746. SSL_CIPHER_find \
  747. SSL_CTX_set_security_level \
  748. TLS_method
  749. ])
  750. dnl Check if OpenSSL has scrypt implementation.
  751. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  752. dnl Check if OpenSSL structures are opaque
  753. AC_CHECK_MEMBERS([SSL.state], , ,
  754. [#include <openssl/ssl.h>
  755. ])
  756. dnl Define the set of checks for KIST scheduler support.
  757. AC_DEFUN([CHECK_KIST_SUPPORT],[
  758. dnl KIST needs struct tcp_info and for certain members to exist.
  759. AC_CHECK_MEMBERS(
  760. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  761. , ,[[#include <netinet/tcp.h>]])
  762. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  763. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  764. #include <linux/sockios.h>
  765. #ifndef SIOCOUTQNSD
  766. #error
  767. #endif
  768. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  769. if test "x$have_siocoutqnsd" = "xyes"; then
  770. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  771. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  772. have_kist_support=yes
  773. fi
  774. fi
  775. fi
  776. ])
  777. dnl Now, trigger the check.
  778. CHECK_KIST_SUPPORT
  779. AS_IF([test "x$have_kist_support" = "xyes"],
  780. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  781. on this system])],
  782. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  783. LIBS="$save_LIBS"
  784. LDFLAGS="$save_LDFLAGS"
  785. CPPFLAGS="$save_CPPFLAGS"
  786. dnl ------------------------------------------------------
  787. dnl Where do you live, zlib? And how do we call you?
  788. tor_zlib_pkg_redhat="zlib"
  789. tor_zlib_pkg_debian="zlib1g"
  790. tor_zlib_devpkg_redhat="zlib-devel"
  791. tor_zlib_devpkg_debian="zlib1g-dev"
  792. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  793. [#include <zlib.h>],
  794. [const char * zlibVersion(void);],
  795. [zlibVersion();], [--with-zlib-dir],
  796. [/opt/zlib])
  797. if test "$enable_static_zlib" = "yes"; then
  798. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  799. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  800. using --enable-static-zlib")
  801. else
  802. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  803. fi
  804. else
  805. TOR_ZLIB_LIBS="-lz"
  806. fi
  807. AC_SUBST(TOR_ZLIB_LIBS)
  808. dnl ------------------------------------------------------
  809. dnl Where we do we find lzma?
  810. AC_ARG_ENABLE(lzma,
  811. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  812. [case "${enableval}" in
  813. "yes") lzma=true ;;
  814. "no") lzma=false ;;
  815. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  816. esac], [lzma=auto])
  817. if test "x$enable_lzma" = "xno"; then
  818. have_lzma=no;
  819. else
  820. PKG_CHECK_MODULES([LZMA],
  821. [liblzma],
  822. have_lzma=yes,
  823. have_lzma=no)
  824. if test "x$have_lzma" = "xno" ; then
  825. AC_MSG_WARN([Unable to find liblzma.])
  826. fi
  827. fi
  828. if test "x$have_lzma" = "xyes"; then
  829. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  830. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  831. TOR_LZMA_LIBS="${LZMA_LIBS}"
  832. fi
  833. AC_SUBST(TOR_LZMA_CFLAGS)
  834. AC_SUBST(TOR_LZMA_LIBS)
  835. dnl ------------------------------------------------------
  836. dnl Where we do we find zstd?
  837. AC_ARG_ENABLE(zstd,
  838. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  839. [case "${enableval}" in
  840. "yes") zstd=true ;;
  841. "no") zstd=false ;;
  842. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  843. esac], [zstd=auto])
  844. if test "x$enable_zstd" = "xno"; then
  845. have_zstd=no;
  846. else
  847. PKG_CHECK_MODULES([ZSTD],
  848. [libzstd >= 1.1],
  849. have_zstd=yes,
  850. have_zstd=no)
  851. if test "x$have_zstd" = "xno" ; then
  852. AC_MSG_WARN([Unable to find libzstd.])
  853. fi
  854. fi
  855. if test "x$have_zstd" = "xyes"; then
  856. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  857. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  858. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  859. fi
  860. AC_SUBST(TOR_ZSTD_CFLAGS)
  861. AC_SUBST(TOR_ZSTD_LIBS)
  862. dnl ----------------------------------------------------------------------
  863. dnl Check if libcap is available for capabilities.
  864. tor_cap_pkg_debian="libcap2"
  865. tor_cap_pkg_redhat="libcap"
  866. tor_cap_devpkg_debian="libcap-dev"
  867. tor_cap_devpkg_redhat="libcap-devel"
  868. AC_CHECK_LIB([cap], [cap_init], [],
  869. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  870. )
  871. AC_CHECK_FUNCS(cap_set_proc)
  872. dnl ---------------------------------------------------------------------
  873. dnl Now that we know about our major libraries, we can check for compiler
  874. dnl and linker hardening options. We need to do this with the libraries known,
  875. dnl since sometimes the linker will like an option but not be willing to
  876. dnl use it with a build of a library.
  877. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  878. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  879. CFLAGS_FTRAPV=
  880. CFLAGS_FWRAPV=
  881. CFLAGS_ASAN=
  882. CFLAGS_UBSAN=
  883. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  884. #if !defined(__clang__)
  885. #error
  886. #endif])], have_clang=yes, have_clang=no)
  887. if test "x$enable_gcc_hardening" != "xno"; then
  888. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  889. if test "x$have_clang" = "xyes"; then
  890. TOR_CHECK_CFLAGS(-Qunused-arguments)
  891. fi
  892. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  893. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  894. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  895. m4_ifdef([AS_VAR_IF],[
  896. AS_VAR_IF(can_compile, [yes],
  897. AS_VAR_IF(can_link, [yes],
  898. [],
  899. 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.)]))
  900. )])
  901. AS_VAR_POPDEF([can_link])
  902. AS_VAR_POPDEF([can_compile])
  903. TOR_CHECK_CFLAGS(-Wstack-protector)
  904. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  905. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  906. TOR_CHECK_CFLAGS(-fPIE)
  907. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  908. fi
  909. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  910. fi
  911. if test "$fragile_hardening" = "yes"; then
  912. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  913. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  914. 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.])
  915. fi
  916. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  917. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  918. fi
  919. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  920. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  921. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  922. fi
  923. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  924. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  925. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  926. fi
  927. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  928. fi
  929. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  930. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  931. mulodi_fixes_ftrapv=no
  932. if test "$have_clang" = "yes"; then
  933. saved_CFLAGS="$CFLAGS"
  934. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  935. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  936. AC_LINK_IFELSE([
  937. AC_LANG_SOURCE([[
  938. #include <stdint.h>
  939. #include <stdlib.h>
  940. int main(int argc, char **argv)
  941. {
  942. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  943. * (int64_t)atoi(argv[3]);
  944. return x == 9;
  945. } ]])],
  946. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  947. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  948. if test "$ftrapv_can_link" = "no"; then
  949. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  950. AC_LINK_IFELSE([
  951. AC_LANG_SOURCE([[
  952. #include <stdint.h>
  953. #include <stdlib.h>
  954. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  955. *overflow=0;
  956. return a;
  957. }
  958. int main(int argc, char **argv)
  959. {
  960. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  961. * (int64_t)atoi(argv[3]);
  962. return x == 9;
  963. } ]])],
  964. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  965. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  966. fi
  967. CFLAGS="$saved_CFLAGS"
  968. fi
  969. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  970. dnl These cflags add bunches of branches, and we haven't been able to
  971. dnl persuade ourselves that they're suitable for code that needs to be
  972. dnl constant time.
  973. AC_SUBST(CFLAGS_BUGTRAP)
  974. dnl These cflags are variant ones sutable for code that needs to be
  975. dnl constant-time.
  976. AC_SUBST(CFLAGS_CONSTTIME)
  977. if test "x$enable_linker_hardening" != "xno"; then
  978. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  979. fi
  980. # For backtrace support
  981. TOR_CHECK_LDFLAGS(-rdynamic)
  982. dnl ------------------------------------------------------
  983. dnl Now see if we have a -fomit-frame-pointer compiler option.
  984. saved_CFLAGS="$CFLAGS"
  985. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  986. F_OMIT_FRAME_POINTER=''
  987. if test "$saved_CFLAGS" != "$CFLAGS"; then
  988. if test "$fragile_hardening" = "yes"; then
  989. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  990. fi
  991. fi
  992. CFLAGS="$saved_CFLAGS"
  993. AC_SUBST(F_OMIT_FRAME_POINTER)
  994. dnl ------------------------------------------------------
  995. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  996. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  997. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  998. dnl code will work.
  999. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  1000. dnl ============================================================
  1001. dnl Check for libseccomp
  1002. if test "x$enable_seccomp" != "xno"; then
  1003. AC_CHECK_HEADERS([seccomp.h])
  1004. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  1005. fi
  1006. dnl ============================================================
  1007. dnl Check for libscrypt
  1008. if test "x$enable_libscrypt" != "xno"; then
  1009. AC_CHECK_HEADERS([libscrypt.h])
  1010. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  1011. AC_CHECK_FUNCS([libscrypt_scrypt])
  1012. fi
  1013. dnl ============================================================
  1014. dnl We need an implementation of curve25519.
  1015. dnl set these defaults.
  1016. build_curve25519_donna=no
  1017. build_curve25519_donna_c64=no
  1018. use_curve25519_donna=no
  1019. use_curve25519_nacl=no
  1020. CURVE25519_LIBS=
  1021. dnl The best choice is using curve25519-donna-c64, but that requires
  1022. dnl that we
  1023. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  1024. tor_cv_can_use_curve25519_donna_c64,
  1025. [AC_RUN_IFELSE(
  1026. [AC_LANG_PROGRAM([dnl
  1027. #include <stdint.h>
  1028. typedef unsigned uint128_t __attribute__((mode(TI)));
  1029. int func(uint64_t a, uint64_t b) {
  1030. uint128_t c = ((uint128_t)a) * b;
  1031. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1032. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1033. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1034. (((uint64_t)(c))&0xffffffffL) == 0;
  1035. return ok;
  1036. }
  1037. ], [dnl
  1038. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1039. ((uint64_t)1234567890) << 24);
  1040. return !ok;
  1041. ])],
  1042. [tor_cv_can_use_curve25519_donna_c64=yes],
  1043. [tor_cv_can_use_curve25519_donna_c64=no],
  1044. [AC_LINK_IFELSE(
  1045. [AC_LANG_PROGRAM([dnl
  1046. #include <stdint.h>
  1047. typedef unsigned uint128_t __attribute__((mode(TI)));
  1048. int func(uint64_t a, uint64_t b) {
  1049. uint128_t c = ((uint128_t)a) * b;
  1050. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1051. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1052. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1053. (((uint64_t)(c))&0xffffffffL) == 0;
  1054. return ok;
  1055. }
  1056. ], [dnl
  1057. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1058. ((uint64_t)1234567890) << 24);
  1059. return !ok;
  1060. ])],
  1061. [tor_cv_can_use_curve25519_donna_c64=cross],
  1062. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1063. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1064. nacl/crypto_scalarmult_curve25519.h])
  1065. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1066. tor_cv_can_use_curve25519_nacl,
  1067. [tor_saved_LIBS="$LIBS"
  1068. LIBS="$LIBS -lnacl"
  1069. AC_LINK_IFELSE(
  1070. [AC_LANG_PROGRAM([dnl
  1071. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1072. #include <crypto_scalarmult_curve25519.h>
  1073. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1074. #include <nacl/crypto_scalarmult_curve25519.h>
  1075. #endif
  1076. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1077. #error Hey, this is the reference implementation! That's not fast.
  1078. #endif
  1079. ], [
  1080. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1081. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1082. [tor_cv_can_use_curve25519_nacl=no])
  1083. LIBS="$tor_saved_LIBS" ])
  1084. dnl Okay, now we need to figure out which one to actually use. Fall back
  1085. dnl to curve25519-donna.c
  1086. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1087. build_curve25519_donna_c64=yes
  1088. use_curve25519_donna=yes
  1089. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1090. use_curve25519_nacl=yes
  1091. CURVE25519_LIBS=-lnacl
  1092. else
  1093. build_curve25519_donna=yes
  1094. use_curve25519_donna=yes
  1095. fi
  1096. if test "x$use_curve25519_donna" = "xyes"; then
  1097. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1098. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1099. fi
  1100. if test "x$use_curve25519_nacl" = "xyes"; then
  1101. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1102. [Defined if we should use a curve25519 from nacl])
  1103. fi
  1104. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1105. test "x$build_curve25519_donna" = "xyes")
  1106. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1107. test "x$build_curve25519_donna_c64" = "xyes")
  1108. AC_SUBST(CURVE25519_LIBS)
  1109. dnl Make sure to enable support for large off_t if available.
  1110. AC_SYS_LARGEFILE
  1111. AC_CHECK_HEADERS([assert.h \
  1112. errno.h \
  1113. fcntl.h \
  1114. signal.h \
  1115. string.h \
  1116. sys/capability.h \
  1117. sys/fcntl.h \
  1118. sys/stat.h \
  1119. sys/time.h \
  1120. sys/types.h \
  1121. time.h \
  1122. unistd.h \
  1123. arpa/inet.h \
  1124. crt_externs.h \
  1125. execinfo.h \
  1126. gnu/libc-version.h \
  1127. grp.h \
  1128. ifaddrs.h \
  1129. inttypes.h \
  1130. limits.h \
  1131. linux/types.h \
  1132. machine/limits.h \
  1133. malloc.h \
  1134. malloc/malloc.h \
  1135. malloc_np.h \
  1136. netdb.h \
  1137. netinet/in.h \
  1138. netinet/in6.h \
  1139. pwd.h \
  1140. readpassphrase.h \
  1141. stdint.h \
  1142. stdatomic.h \
  1143. sys/eventfd.h \
  1144. sys/file.h \
  1145. sys/ioctl.h \
  1146. sys/limits.h \
  1147. sys/mman.h \
  1148. sys/param.h \
  1149. sys/prctl.h \
  1150. sys/random.h \
  1151. sys/resource.h \
  1152. sys/select.h \
  1153. sys/socket.h \
  1154. sys/statvfs.h \
  1155. sys/syscall.h \
  1156. sys/sysctl.h \
  1157. sys/syslimits.h \
  1158. sys/time.h \
  1159. sys/types.h \
  1160. sys/un.h \
  1161. sys/utime.h \
  1162. sys/wait.h \
  1163. syslog.h \
  1164. utime.h])
  1165. AC_CHECK_HEADERS(sys/param.h)
  1166. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1167. [#ifdef HAVE_SYS_TYPES_H
  1168. #include <sys/types.h>
  1169. #endif
  1170. #ifdef HAVE_SYS_SOCKET_H
  1171. #include <sys/socket.h>
  1172. #endif])
  1173. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1174. [#ifdef HAVE_SYS_TYPES_H
  1175. #include <sys/types.h>
  1176. #endif
  1177. #ifdef HAVE_SYS_SOCKET_H
  1178. #include <sys/socket.h>
  1179. #endif
  1180. #ifdef HAVE_NET_IF_H
  1181. #include <net/if.h>
  1182. #endif
  1183. #ifdef HAVE_NETINET_IN_H
  1184. #include <netinet/in.h>
  1185. #endif])
  1186. AC_CHECK_HEADERS(linux/if.h,[],[],
  1187. [
  1188. #ifdef HAVE_SYS_SOCKET_H
  1189. #include <sys/socket.h>
  1190. #endif
  1191. ])
  1192. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1193. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1194. [#ifdef HAVE_SYS_TYPES_H
  1195. #include <sys/types.h>
  1196. #endif
  1197. #ifdef HAVE_SYS_SOCKET_H
  1198. #include <sys/socket.h>
  1199. #endif
  1200. #ifdef HAVE_LIMITS_H
  1201. #include <limits.h>
  1202. #endif
  1203. #ifdef HAVE_LINUX_TYPES_H
  1204. #include <linux/types.h>
  1205. #endif
  1206. #ifdef HAVE_NETINET_IN6_H
  1207. #include <netinet/in6.h>
  1208. #endif
  1209. #ifdef HAVE_NETINET_IN_H
  1210. #include <netinet/in.h>
  1211. #endif])
  1212. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1213. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1214. [#ifdef HAVE_SYS_TYPES_H
  1215. #include <sys/types.h>
  1216. #endif
  1217. #ifdef HAVE_SYS_SOCKET_H
  1218. #include <sys/socket.h>
  1219. #endif
  1220. #ifdef HAVE_LIMITS_H
  1221. #include <limits.h>
  1222. #endif
  1223. #ifdef HAVE_LINUX_TYPES_H
  1224. #include <linux/types.h>
  1225. #endif
  1226. #ifdef HAVE_NETINET_IN6_H
  1227. #include <netinet/in6.h>
  1228. #endif
  1229. #ifdef HAVE_NETINET_IN_H
  1230. #include <netinet/in.h>
  1231. #endif
  1232. #ifdef HAVE_LINUX_IF_H
  1233. #include <linux/if.h>
  1234. #endif])
  1235. transparent_ok=0
  1236. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1237. transparent_ok=1
  1238. fi
  1239. if test "x$linux_netfilter_ipv4" = "x1"; then
  1240. transparent_ok=1
  1241. fi
  1242. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1243. transparent_ok=1
  1244. fi
  1245. if test "x$transparent_ok" = "x1"; then
  1246. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1247. else
  1248. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1249. fi
  1250. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1251. [#ifdef HAVE_SYS_TYPES_H
  1252. #include <sys/types.h>
  1253. #endif
  1254. #ifdef HAVE_SYS_TIME_H
  1255. #include <sys/time.h>
  1256. #endif])
  1257. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1258. dnl Watch out.
  1259. AC_CHECK_SIZEOF(int8_t)
  1260. AC_CHECK_SIZEOF(int16_t)
  1261. AC_CHECK_SIZEOF(int32_t)
  1262. AC_CHECK_SIZEOF(int64_t)
  1263. AC_CHECK_SIZEOF(uint8_t)
  1264. AC_CHECK_SIZEOF(uint16_t)
  1265. AC_CHECK_SIZEOF(uint32_t)
  1266. AC_CHECK_SIZEOF(uint64_t)
  1267. AC_CHECK_SIZEOF(intptr_t)
  1268. AC_CHECK_SIZEOF(uintptr_t)
  1269. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1270. AC_CHECK_SIZEOF(char)
  1271. AC_CHECK_SIZEOF(short)
  1272. AC_CHECK_SIZEOF(int)
  1273. AC_CHECK_SIZEOF(long)
  1274. AC_CHECK_SIZEOF(long long)
  1275. AC_CHECK_SIZEOF(__int64)
  1276. AC_CHECK_SIZEOF(void *)
  1277. AC_CHECK_SIZEOF(time_t)
  1278. AC_CHECK_SIZEOF(size_t)
  1279. AC_CHECK_SIZEOF(pid_t)
  1280. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1281. AC_PC_FROM_UCONTEXT([:])
  1282. dnl used to include sockaddr_storage, but everybody has that.
  1283. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1284. [#ifdef HAVE_SYS_TYPES_H
  1285. #include <sys/types.h>
  1286. #endif
  1287. #ifdef HAVE_NETINET_IN_H
  1288. #include <netinet/in.h>
  1289. #endif
  1290. #ifdef HAVE_NETINET_IN6_H
  1291. #include <netinet/in6.h>
  1292. #endif
  1293. #ifdef HAVE_SYS_SOCKET_H
  1294. #include <sys/socket.h>
  1295. #endif
  1296. #ifdef _WIN32
  1297. #define _WIN32_WINNT 0x0501
  1298. #define WIN32_LEAN_AND_MEAN
  1299. #include <winsock2.h>
  1300. #include <ws2tcpip.h>
  1301. #endif
  1302. ])
  1303. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1304. [#ifdef HAVE_SYS_TYPES_H
  1305. #include <sys/types.h>
  1306. #endif
  1307. #ifdef HAVE_NETINET_IN_H
  1308. #include <netinet/in.h>
  1309. #endif
  1310. #ifdef HAVE_NETINET_IN6_H
  1311. #include <netinet/in6.h>
  1312. #endif
  1313. #ifdef HAVE_SYS_SOCKET_H
  1314. #include <sys/socket.h>
  1315. #endif
  1316. #ifdef _WIN32
  1317. #define _WIN32_WINNT 0x0501
  1318. #define WIN32_LEAN_AND_MEAN
  1319. #include <winsock2.h>
  1320. #include <ws2tcpip.h>
  1321. #endif
  1322. ])
  1323. AC_CHECK_TYPES([rlim_t], , ,
  1324. [#ifdef HAVE_SYS_TYPES_H
  1325. #include <sys/types.h>
  1326. #endif
  1327. #ifdef HAVE_SYS_TIME_H
  1328. #include <sys/time.h>
  1329. #endif
  1330. #ifdef HAVE_SYS_RESOURCE_H
  1331. #include <sys/resource.h>
  1332. #endif
  1333. ])
  1334. AX_CHECK_SIGN([time_t],
  1335. [ : ],
  1336. [ : ], [
  1337. #ifdef HAVE_SYS_TYPES_H
  1338. #include <sys/types.h>
  1339. #endif
  1340. #ifdef HAVE_SYS_TIME_H
  1341. #include <sys/time.h>
  1342. #endif
  1343. #ifdef HAVE_TIME_H
  1344. #include <time.h>
  1345. #endif
  1346. ])
  1347. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1348. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1349. fi
  1350. AX_CHECK_SIGN([size_t],
  1351. [ tor_cv_size_t_signed=yes ],
  1352. [ tor_cv_size_t_signed=no ], [
  1353. #ifdef HAVE_SYS_TYPES_H
  1354. #include <sys/types.h>
  1355. #endif
  1356. ])
  1357. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1358. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1359. fi
  1360. AX_CHECK_SIGN([enum always],
  1361. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1362. [ : ], [
  1363. enum always { AAA, BBB, CCC };
  1364. ])
  1365. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1366. #ifdef HAVE_SYS_SOCKET_H
  1367. #include <sys/socket.h>
  1368. #endif
  1369. ])
  1370. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1371. AC_CHECK_SIZEOF(cell_t)
  1372. # Let's see if stdatomic works. (There are some debian clangs that screw it
  1373. # up; see Tor bug #26779 and debian bug 903709.)
  1374. AC_CACHE_CHECK([whether C11 stdatomic.h actually works],
  1375. tor_cv_stdatomic_works,
  1376. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1377. #include <stdatomic.h>
  1378. struct x { atomic_size_t y; };
  1379. void try_atomic_init(struct x *xx)
  1380. {
  1381. atomic_init(&xx->y, 99);
  1382. atomic_fetch_add(&xx->y, 1);
  1383. }
  1384. ]])], [tor_cv_stdatomic_works=yes], [tor_cv_stdatomic_works=no])])
  1385. if test "$tor_cv_stdatomic_works" = "yes"; then
  1386. AC_DEFINE(STDATOMIC_WORKS, 1, [Set to 1 if we can compile a simple stdatomic example.])
  1387. elif test "$ac_cv_header_stdatomic_h" = "yes"; then
  1388. AC_MSG_WARN([Your compiler provides the stdatomic.h header, but it doesn't seem to work. I'll pretend it isn't there. If you are using Clang on Debian, maybe this is because of https://bugs.debian.org/903709 ])
  1389. fi
  1390. # Now make sure that NULL can be represented as zero bytes.
  1391. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1392. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1393. [[#include <stdlib.h>
  1394. #include <string.h>
  1395. #include <stdio.h>
  1396. #ifdef HAVE_STDDEF_H
  1397. #include <stddef.h>
  1398. #endif
  1399. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1400. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1401. [tor_cv_null_is_zero=yes],
  1402. [tor_cv_null_is_zero=no],
  1403. [tor_cv_null_is_zero=cross])])
  1404. if test "$tor_cv_null_is_zero" = "cross"; then
  1405. # Cross-compiling; let's hope that the target isn't raving mad.
  1406. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1407. fi
  1408. if test "$tor_cv_null_is_zero" != "no"; then
  1409. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1410. [Define to 1 iff memset(0) sets pointers to NULL])
  1411. fi
  1412. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1413. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1414. [[#include <stdlib.h>
  1415. #include <string.h>
  1416. #include <stdio.h>
  1417. #ifdef HAVE_STDDEF_H
  1418. #include <stddef.h>
  1419. #endif
  1420. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1421. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1422. [tor_cv_dbl0_is_zero=yes],
  1423. [tor_cv_dbl0_is_zero=no],
  1424. [tor_cv_dbl0_is_zero=cross])])
  1425. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1426. # Cross-compiling; let's hope that the target isn't raving mad.
  1427. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1428. fi
  1429. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1430. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1431. [Define to 1 iff memset(0) sets doubles to 0.0])
  1432. fi
  1433. # And what happens when we malloc zero?
  1434. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1435. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1436. [[#include <stdlib.h>
  1437. #include <string.h>
  1438. #include <stdio.h>
  1439. #ifdef HAVE_STDDEF_H
  1440. #include <stddef.h>
  1441. #endif
  1442. int main () { return malloc(0)?0:1; }]])],
  1443. [tor_cv_malloc_zero_works=yes],
  1444. [tor_cv_malloc_zero_works=no],
  1445. [tor_cv_malloc_zero_works=cross])])
  1446. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1447. # Cross-compiling; let's hope that the target isn't raving mad.
  1448. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1449. fi
  1450. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1451. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1452. [Define to 1 iff malloc(0) returns a pointer])
  1453. fi
  1454. # whether we seem to be in a 2s-complement world.
  1455. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1456. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1457. [[int main () { int problem = ((-99) != (~99)+1);
  1458. return problem ? 1 : 0; }]])],
  1459. [tor_cv_twos_complement=yes],
  1460. [tor_cv_twos_complement=no],
  1461. [tor_cv_twos_complement=cross])])
  1462. if test "$tor_cv_twos_complement" = "cross"; then
  1463. # Cross-compiling; let's hope that the target isn't raving mad.
  1464. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1465. fi
  1466. if test "$tor_cv_twos_complement" != "no"; then
  1467. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1468. [Define to 1 iff we represent negative integers with
  1469. two's complement])
  1470. fi
  1471. # What does shifting a negative value do?
  1472. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1473. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1474. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1475. [tor_cv_sign_extend=yes],
  1476. [tor_cv_sign_extend=no],
  1477. [tor_cv_sign_extend=cross])])
  1478. if test "$tor_cv_sign_extend" = "cross"; then
  1479. # Cross-compiling; let's hope that the target isn't raving mad.
  1480. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1481. fi
  1482. if test "$tor_cv_sign_extend" != "no"; then
  1483. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1484. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1485. fi
  1486. # Is uint8_t the same type as unsigned char?
  1487. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1488. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1489. #include <stdint.h>
  1490. extern uint8_t c;
  1491. unsigned char c;]])],
  1492. [tor_cv_uint8_uchar=yes],
  1493. [tor_cv_uint8_uchar=no],
  1494. [tor_cv_uint8_uchar=cross])])
  1495. if test "$tor_cv_uint8_uchar" = "cross"; then
  1496. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1497. fi
  1498. if test "$tor_cv_uint8_uchar" = "no"; then
  1499. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1500. fi
  1501. # Whether we should use the dmalloc memory allocation debugging library.
  1502. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1503. AC_ARG_WITH(dmalloc,
  1504. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1505. [if [[ "$withval" = "yes" ]]; then
  1506. dmalloc=1
  1507. AC_MSG_RESULT(yes)
  1508. else
  1509. dmalloc=1
  1510. AC_MSG_RESULT(no)
  1511. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1512. )
  1513. if [[ $dmalloc -eq 1 ]]; then
  1514. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1515. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1516. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1517. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1518. fi
  1519. AC_ARG_WITH(tcmalloc,
  1520. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1521. [ tcmalloc=yes ], [ tcmalloc=no ])
  1522. if test "x$tcmalloc" = "xyes"; then
  1523. LDFLAGS="-ltcmalloc $LDFLAGS"
  1524. fi
  1525. using_custom_malloc=no
  1526. if test "x$enable_openbsd_malloc" = "xyes"; then
  1527. using_custom_malloc=yes
  1528. fi
  1529. if test "x$tcmalloc" = "xyes"; then
  1530. using_custom_malloc=yes
  1531. fi
  1532. if test "$using_custom_malloc" = "no"; then
  1533. AC_CHECK_FUNCS(mallinfo)
  1534. fi
  1535. if test "$using_custom_malloc" = "yes"; then
  1536. # Tell the C compiler not to use the system allocator functions.
  1537. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1538. fi
  1539. # By default, we're going to assume we don't have mlockall()
  1540. # bionic and other platforms have various broken mlockall subsystems.
  1541. # Some systems don't have a working mlockall, some aren't linkable,
  1542. # and some have it but don't declare it.
  1543. AC_CHECK_FUNCS(mlockall)
  1544. AC_CHECK_DECLS([mlockall], , , [
  1545. #ifdef HAVE_SYS_MMAN_H
  1546. #include <sys/mman.h>
  1547. #endif])
  1548. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1549. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1550. # using macros
  1551. AC_CHECK_DECLS([getpagesize], , , [
  1552. #ifdef HAVE_UNISTD_H
  1553. #include <unistd.h>
  1554. #endif])
  1555. # Allow user to specify an alternate syslog facility
  1556. AC_ARG_WITH(syslog-facility,
  1557. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1558. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1559. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1560. AC_SUBST(LOGFACILITY)
  1561. # Check if we have getresuid and getresgid
  1562. AC_CHECK_FUNCS(getresuid getresgid)
  1563. # Check for gethostbyname_r in all its glorious incompatible versions.
  1564. # (This logic is based on that in Python's configure.in)
  1565. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1566. [Define this if you have any gethostbyname_r()])
  1567. AC_CHECK_FUNC(gethostbyname_r, [
  1568. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1569. OLD_CFLAGS=$CFLAGS
  1570. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1571. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1572. #include <netdb.h>
  1573. ]], [[
  1574. char *cp1, *cp2;
  1575. struct hostent *h1, *h2;
  1576. int i1, i2;
  1577. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1578. ]])],[
  1579. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1580. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1581. [Define this if gethostbyname_r takes 6 arguments])
  1582. AC_MSG_RESULT(6)
  1583. ], [
  1584. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1585. #include <netdb.h>
  1586. ]], [[
  1587. char *cp1, *cp2;
  1588. struct hostent *h1;
  1589. int i1, i2;
  1590. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1591. ]])], [
  1592. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1593. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1594. [Define this if gethostbyname_r takes 5 arguments])
  1595. AC_MSG_RESULT(5)
  1596. ], [
  1597. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1598. #include <netdb.h>
  1599. ]], [[
  1600. char *cp1;
  1601. struct hostent *h1;
  1602. struct hostent_data hd;
  1603. (void) gethostbyname_r(cp1,h1,&hd);
  1604. ]])], [
  1605. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1606. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1607. [Define this if gethostbyname_r takes 3 arguments])
  1608. AC_MSG_RESULT(3)
  1609. ], [
  1610. AC_MSG_RESULT(0)
  1611. ])
  1612. ])
  1613. ])
  1614. CFLAGS=$OLD_CFLAGS
  1615. ])
  1616. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1617. tor_cv_have_func_macro,
  1618. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1619. #include <stdio.h>
  1620. int main(int c, char **v) { puts(__func__); }])],
  1621. tor_cv_have_func_macro=yes,
  1622. tor_cv_have_func_macro=no))
  1623. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1624. tor_cv_have_FUNC_macro,
  1625. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1626. #include <stdio.h>
  1627. int main(int c, char **v) { puts(__FUNC__); }])],
  1628. tor_cv_have_FUNC_macro=yes,
  1629. tor_cv_have_FUNC_macro=no))
  1630. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1631. tor_cv_have_FUNCTION_macro,
  1632. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1633. #include <stdio.h>
  1634. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1635. tor_cv_have_FUNCTION_macro=yes,
  1636. tor_cv_have_FUNCTION_macro=no))
  1637. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1638. tor_cv_have_environ_declared,
  1639. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1640. #ifdef HAVE_UNISTD_H
  1641. #include <unistd.h>
  1642. #endif
  1643. #include <stdlib.h>
  1644. int main(int c, char **v) { char **t = environ; }])],
  1645. tor_cv_have_environ_declared=yes,
  1646. tor_cv_have_environ_declared=no))
  1647. if test "$tor_cv_have_func_macro" = "yes"; then
  1648. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1649. fi
  1650. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1651. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1652. fi
  1653. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1654. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1655. [Defined if the compiler supports __FUNCTION__])
  1656. fi
  1657. if test "$tor_cv_have_environ_declared" = "yes"; then
  1658. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1659. [Defined if we have extern char **environ already declared])
  1660. fi
  1661. # $prefix stores the value of the --prefix command line option, or
  1662. # NONE if the option wasn't set. In the case that it wasn't set, make
  1663. # it be the default, so that we can use it to expand directories now.
  1664. if test "x$prefix" = "xNONE"; then
  1665. prefix=$ac_default_prefix
  1666. fi
  1667. # and similarly for $exec_prefix
  1668. if test "x$exec_prefix" = "xNONE"; then
  1669. exec_prefix=$prefix
  1670. fi
  1671. if test "x$BUILDDIR" = "x"; then
  1672. BUILDDIR=`pwd`
  1673. fi
  1674. AC_SUBST(BUILDDIR)
  1675. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1676. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1677. if test "x$CONFDIR" = "x"; then
  1678. CONFDIR=`eval echo $sysconfdir/tor`
  1679. fi
  1680. AC_SUBST(CONFDIR)
  1681. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1682. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1683. BINDIR=`eval echo $bindir`
  1684. AC_SUBST(BINDIR)
  1685. LOCALSTATEDIR=`eval echo $localstatedir`
  1686. AC_SUBST(LOCALSTATEDIR)
  1687. if test "$bwin32" = "true"; then
  1688. # Test if the linker supports the --nxcompat and --dynamicbase options
  1689. # for Windows
  1690. save_LDFLAGS="$LDFLAGS"
  1691. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1692. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1693. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1694. [AC_MSG_RESULT([yes])]
  1695. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1696. [AC_MSG_RESULT([no])]
  1697. )
  1698. LDFLAGS="$save_LDFLAGS"
  1699. fi
  1700. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1701. # than autoconf's macros like.
  1702. if test "$GCC" = "yes"; then
  1703. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1704. # accident waiting to happen.
  1705. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1706. else
  1707. # Override optimization level for non-gcc compilers
  1708. CFLAGS="$CFLAGS -O"
  1709. enable_gcc_warnings=no
  1710. enable_gcc_warnings_advisory=no
  1711. fi
  1712. # Warnings implies advisory-warnings and -Werror.
  1713. if test "$enable_gcc_warnings" = "yes"; then
  1714. enable_gcc_warnings_advisory=yes
  1715. enable_fatal_warnings=yes
  1716. fi
  1717. # OS X Lion started deprecating the system openssl. Let's just disable
  1718. # all deprecation warnings on OS X. Also, to potentially make the binary
  1719. # a little smaller, let's enable dead_strip.
  1720. case "$host_os" in
  1721. darwin*)
  1722. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1723. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1724. esac
  1725. # Add some more warnings which we use in development but not in the
  1726. # released versions. (Some relevant gcc versions can't handle these.)
  1727. #
  1728. # Note that we have to do this near the end of the autoconf process, or
  1729. # else we may run into problems when these warnings hit on the testing C
  1730. # programs that autoconf wants to build.
  1731. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1732. case "$host" in
  1733. *-*-openbsd* | *-*-bitrig*)
  1734. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1735. # That's fine, except that the headers don't pass -Wredundant-decls.
  1736. # Therefore, let's disable -Wsystem-headers when we're building
  1737. # with maximal warnings on OpenBSD.
  1738. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1739. esac
  1740. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1741. # have it work better.
  1742. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1743. # This warning was added in gcc 4.3, but it appears to generate
  1744. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1745. #CFLAGS="$CFLAGS -Wlogical-op"
  1746. m4_foreach_w([warning_flag], [
  1747. -Waddress
  1748. -Waddress-of-array-temporary
  1749. -Waddress-of-temporary
  1750. -Wambiguous-macro
  1751. -Wanonymous-pack-parens
  1752. -Warc
  1753. -Warc-abi
  1754. -Warc-bridge-casts-disallowed-in-nonarc
  1755. -Warc-maybe-repeated-use-of-weak
  1756. -Warc-performSelector-leaks
  1757. -Warc-repeated-use-of-weak
  1758. -Warray-bounds
  1759. -Warray-bounds-pointer-arithmetic
  1760. -Wasm
  1761. -Wasm-operand-widths
  1762. -Watomic-properties
  1763. -Watomic-property-with-user-defined-accessor
  1764. -Wauto-import
  1765. -Wauto-storage-class
  1766. -Wauto-var-id
  1767. -Wavailability
  1768. -Wbackslash-newline-escape
  1769. -Wbad-array-new-length
  1770. -Wbind-to-temporary-copy
  1771. -Wbitfield-constant-conversion
  1772. -Wbool-conversion
  1773. -Wbool-conversions
  1774. -Wbuiltin-requires-header
  1775. -Wchar-align
  1776. -Wcompare-distinct-pointer-types
  1777. -Wcomplex-component-init
  1778. -Wconditional-type-mismatch
  1779. -Wconfig-macros
  1780. -Wconstant-conversion
  1781. -Wconstant-logical-operand
  1782. -Wconstexpr-not-const
  1783. -Wcustom-atomic-properties
  1784. -Wdangling-field
  1785. -Wdangling-initializer-list
  1786. -Wdate-time
  1787. -Wdelegating-ctor-cycles
  1788. -Wdeprecated-implementations
  1789. -Wdeprecated-register
  1790. -Wdirect-ivar-access
  1791. -Wdiscard-qual
  1792. -Wdistributed-object-modifiers
  1793. -Wdivision-by-zero
  1794. -Wdollar-in-identifier-extension
  1795. -Wdouble-promotion
  1796. -Wduplicate-decl-specifier
  1797. -Wduplicate-enum
  1798. -Wduplicate-method-arg
  1799. -Wduplicate-method-match
  1800. -Wduplicated-cond
  1801. -Wdynamic-class-memaccess
  1802. -Wembedded-directive
  1803. -Wempty-translation-unit
  1804. -Wenum-conversion
  1805. -Wexit-time-destructors
  1806. -Wexplicit-ownership-type
  1807. -Wextern-initializer
  1808. -Wextra
  1809. -Wextra-semi
  1810. -Wextra-tokens
  1811. -Wflexible-array-extensions
  1812. -Wfloat-conversion
  1813. -Wformat-non-iso
  1814. -Wfour-char-constants
  1815. -Wgcc-compat
  1816. -Wglobal-constructors
  1817. -Wgnu-array-member-paren-init
  1818. -Wgnu-designator
  1819. -Wgnu-static-float-init
  1820. -Wheader-guard
  1821. -Wheader-hygiene
  1822. -Widiomatic-parentheses
  1823. -Wignored-attributes
  1824. -Wimplicit-atomic-properties
  1825. -Wimplicit-conversion-floating-point-to-bool
  1826. -Wimplicit-exception-spec-mismatch
  1827. -Wimplicit-fallthrough
  1828. -Wimplicit-fallthrough-per-function
  1829. -Wimplicit-retain-self
  1830. -Wimport-preprocessor-directive-pedantic
  1831. -Wincompatible-library-redeclaration
  1832. -Wincompatible-pointer-types-discards-qualifiers
  1833. -Wincomplete-implementation
  1834. -Wincomplete-module
  1835. -Wincomplete-umbrella
  1836. -Winit-self
  1837. -Wint-conversions
  1838. -Wint-to-void-pointer-cast
  1839. -Winteger-overflow
  1840. -Winvalid-constexpr
  1841. -Winvalid-iboutlet
  1842. -Winvalid-noreturn
  1843. -Winvalid-pp-token
  1844. -Winvalid-source-encoding
  1845. -Winvalid-token-paste
  1846. -Wknr-promoted-parameter
  1847. -Wlarge-by-value-copy
  1848. -Wliteral-conversion
  1849. -Wliteral-range
  1850. -Wlocal-type-template-args
  1851. -Wlogical-op
  1852. -Wloop-analysis
  1853. -Wmain-return-type
  1854. -Wmalformed-warning-check
  1855. -Wmethod-signatures
  1856. -Wmicrosoft
  1857. -Wmicrosoft-exists
  1858. -Wmismatched-parameter-types
  1859. -Wmismatched-return-types
  1860. -Wmissing-field-initializers
  1861. -Wmissing-format-attribute
  1862. -Wmissing-noreturn
  1863. -Wmissing-selector-name
  1864. -Wmissing-sysroot
  1865. -Wmissing-variable-declarations
  1866. -Wmodule-conflict
  1867. -Wnested-anon-types
  1868. -Wnewline-eof
  1869. -Wnon-literal-null-conversion
  1870. -Wnon-pod-varargs
  1871. -Wnonportable-cfstrings
  1872. -Wnormalized=nfkc
  1873. -Wnull-arithmetic
  1874. -Wnull-character
  1875. -Wnull-conversion
  1876. -Wnull-dereference
  1877. -Wout-of-line-declaration
  1878. -Wover-aligned
  1879. -Woverlength-strings
  1880. -Woverride-init
  1881. -Woverriding-method-mismatch
  1882. -Wpointer-type-mismatch
  1883. -Wpredefined-identifier-outside-function
  1884. -Wprotocol-property-synthesis-ambiguity
  1885. -Wreadonly-iboutlet-property
  1886. -Wreadonly-setter-attrs
  1887. -Wreceiver-expr
  1888. -Wreceiver-forward-class
  1889. -Wreceiver-is-weak
  1890. -Wreinterpret-base-class
  1891. -Wrequires-super-attribute
  1892. -Wreserved-user-defined-literal
  1893. -Wreturn-stack-address
  1894. -Wsection
  1895. -Wselector-type-mismatch
  1896. -Wsentinel
  1897. -Wserialized-diagnostics
  1898. -Wshadow
  1899. -Wshift-count-negative
  1900. -Wshift-count-overflow
  1901. -Wshift-negative-value
  1902. -Wshift-overflow=2
  1903. -Wshift-sign-overflow
  1904. -Wshorten-64-to-32
  1905. -Wsizeof-array-argument
  1906. -Wsource-uses-openmp
  1907. -Wstatic-float-init
  1908. -Wstatic-in-inline
  1909. -Wstatic-local-in-inline
  1910. -Wstrict-overflow=1
  1911. -Wstring-compare
  1912. -Wstring-conversion
  1913. -Wstrlcpy-strlcat-size
  1914. -Wstrncat-size
  1915. -Wsuggest-attribute=format
  1916. -Wsuggest-attribute=noreturn
  1917. -Wsuper-class-method-mismatch
  1918. -Wswitch-bool
  1919. -Wsync-nand
  1920. -Wtautological-constant-out-of-range-compare
  1921. -Wtentative-definition-incomplete-type
  1922. -Wtrampolines
  1923. -Wtype-safety
  1924. -Wtypedef-redefinition
  1925. -Wtypename-missing
  1926. -Wundefined-inline
  1927. -Wundefined-internal
  1928. -Wundefined-reinterpret-cast
  1929. -Wunicode
  1930. -Wunicode-whitespace
  1931. -Wunknown-warning-option
  1932. -Wunnamed-type-template-args
  1933. -Wunneeded-member-function
  1934. -Wunsequenced
  1935. -Wunsupported-visibility
  1936. -Wunused-but-set-parameter
  1937. -Wunused-but-set-variable
  1938. -Wunused-command-line-argument
  1939. -Wunused-const-variable=2
  1940. -Wunused-exception-parameter
  1941. -Wunused-local-typedefs
  1942. -Wunused-member-function
  1943. -Wunused-sanitize-argument
  1944. -Wunused-volatile-lvalue
  1945. -Wuser-defined-literals
  1946. -Wvariadic-macros
  1947. -Wvector-conversion
  1948. -Wvector-conversions
  1949. -Wvexing-parse
  1950. -Wvisibility
  1951. -Wvla-extension
  1952. -Wzero-length-array
  1953. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1954. dnl We should re-enable this in some later version. Clang doesn't
  1955. dnl mind, but it causes trouble with GCC.
  1956. dnl -Wstrict-overflow=2
  1957. dnl These seem to require annotations that we don't currently use,
  1958. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1959. dnl -Wthread-safety
  1960. dnl -Wthread-safety-analysis
  1961. dnl -Wthread-safety-attributes
  1962. dnl -Wthread-safety-beta
  1963. dnl -Wthread-safety-precise
  1964. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1965. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1966. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1967. CFLAGS="$CFLAGS -Wwrite-strings"
  1968. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1969. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1970. CFLAGS="$CFLAGS -Wunused-parameter "
  1971. # These interfere with building main() { return 0; }, which autoconf
  1972. # likes to use as its default program.
  1973. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1974. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1975. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1976. fi
  1977. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1978. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1979. fi
  1980. if test "$tor_cv_cflags__warn_unused_const_variable_2" = "yes"; then
  1981. AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
  1982. fi
  1983. if test "x$enable_fatal_warnings" = "xyes"; then
  1984. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1985. # default autoconf programs are full of errors.
  1986. CFLAGS="$CFLAGS -Werror"
  1987. fi
  1988. fi
  1989. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1990. case "$host_os" in
  1991. darwin*)
  1992. 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.])
  1993. esac
  1994. fi
  1995. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1996. AC_CONFIG_FILES([
  1997. Doxyfile
  1998. Makefile
  1999. contrib/dist/suse/tor.sh
  2000. contrib/operator-tools/tor.logrotate
  2001. contrib/dist/tor.sh
  2002. contrib/dist/torctl
  2003. contrib/dist/tor.service
  2004. src/config/torrc.sample
  2005. src/config/torrc.minimal
  2006. src/rust/.cargo/config
  2007. scripts/maint/checkOptionDocs.pl
  2008. scripts/maint/updateVersions.pl
  2009. ])
  2010. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  2011. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  2012. for file in $regular_mans ; do
  2013. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  2014. echo "==================================";
  2015. echo;
  2016. echo "Building Tor has failed since manpages cannot be built.";
  2017. echo;
  2018. echo "You need asciidoc installed to be able to build the manpages.";
  2019. echo "To build without manpages, use the --disable-asciidoc argument";
  2020. echo "when calling configure.";
  2021. echo;
  2022. echo "==================================";
  2023. exit 1;
  2024. fi
  2025. done
  2026. fi
  2027. if test "$fragile_hardening" = "yes"; then
  2028. AC_MSG_WARN([
  2029. ============
  2030. Warning! Building Tor with --enable-fragile-hardening (also known as
  2031. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  2032. other kinds of attacks easier. A Tor instance build with this option will be
  2033. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  2034. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  2035. denial of service attacks. For more information, see
  2036. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  2037. ============
  2038. ])
  2039. fi
  2040. AC_OUTPUT