configure.ac 70 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],[0.3.3.4-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. 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$asciidoc" = "xtrue")
  223. AM_PROG_CC_C_O
  224. AC_PROG_CC_C99
  225. AC_ARG_VAR([PYTHON], [path to Python binary])
  226. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  227. if test "x$PYTHON" = "x"; then
  228. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  229. fi
  230. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  231. dnl List all external rust crates we depend on here. Include the version
  232. rust_crates="libc-0.2.39"
  233. AC_SUBST(rust_crates)
  234. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  235. AC_C_FLEXIBLE_ARRAY_MEMBER
  236. ], [
  237. dnl Maybe we've got an old autoconf...
  238. AC_CACHE_CHECK([for flexible array members],
  239. tor_cv_c_flexarray,
  240. [AC_COMPILE_IFELSE(
  241. AC_LANG_PROGRAM([
  242. struct abc { int a; char b[]; };
  243. ], [
  244. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  245. def->b[0] = 33;
  246. ]),
  247. [tor_cv_c_flexarray=yes],
  248. [tor_cv_c_flexarray=no])])
  249. if test "$tor_cv_flexarray" = "yes"; then
  250. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  251. else
  252. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  253. fi
  254. ])
  255. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  256. tor_cv_c_c99_decl,
  257. [AC_COMPILE_IFELSE(
  258. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  259. [tor_cv_c_c99_decl=yes],
  260. [tor_cv_c_c99_decl=no] )])
  261. if test "$tor_cv_c_c99_decl" != "yes"; then
  262. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  263. fi
  264. AC_CACHE_CHECK([for working C99 designated initializers],
  265. tor_cv_c_c99_designated_init,
  266. [AC_COMPILE_IFELSE(
  267. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  268. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  269. [tor_cv_c_c99_designated_init=yes],
  270. [tor_cv_c_c99_designated_init=no] )])
  271. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  272. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  273. fi
  274. TORUSER=_tor
  275. AC_ARG_WITH(tor-user,
  276. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  277. [
  278. TORUSER=$withval
  279. ]
  280. )
  281. AC_SUBST(TORUSER)
  282. TORGROUP=_tor
  283. AC_ARG_WITH(tor-group,
  284. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  285. [
  286. TORGROUP=$withval
  287. ]
  288. )
  289. AC_SUBST(TORGROUP)
  290. dnl If _WIN32 is defined and non-zero, we are building for win32
  291. AC_MSG_CHECKING([for win32])
  292. AC_RUN_IFELSE([AC_LANG_SOURCE([
  293. int main(int c, char **v) {
  294. #ifdef _WIN32
  295. #if _WIN32
  296. return 0;
  297. #else
  298. return 1;
  299. #endif
  300. #else
  301. return 2;
  302. #endif
  303. }])],
  304. bwin32=true; AC_MSG_RESULT([yes]),
  305. bwin32=false; AC_MSG_RESULT([no]),
  306. bwin32=cross; AC_MSG_RESULT([cross])
  307. )
  308. if test "$bwin32" = "cross"; then
  309. AC_MSG_CHECKING([for win32 (cross)])
  310. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  311. #ifdef _WIN32
  312. int main(int c, char **v) {return 0;}
  313. #else
  314. #error
  315. int main(int c, char **v) {return x(y);}
  316. #endif
  317. ])],
  318. bwin32=true; AC_MSG_RESULT([yes]),
  319. bwin32=false; AC_MSG_RESULT([no]))
  320. fi
  321. AH_BOTTOM([
  322. #ifdef _WIN32
  323. /* Defined to access windows functions and definitions for >=WinXP */
  324. # ifndef WINVER
  325. # define WINVER 0x0501
  326. # endif
  327. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  328. # ifndef _WIN32_WINNT
  329. # define _WIN32_WINNT 0x0501
  330. # endif
  331. /* Defined to avoid including some windows headers as part of Windows.h */
  332. # ifndef WIN32_LEAN_AND_MEAN
  333. # define WIN32_LEAN_AND_MEAN 1
  334. # endif
  335. #endif
  336. ])
  337. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  338. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  339. dnl Enable C99 when compiling with MIPSpro
  340. AC_MSG_CHECKING([for MIPSpro compiler])
  341. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  342. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  343. #error
  344. return x(y);
  345. #endif
  346. ])],
  347. bmipspro=false; AC_MSG_RESULT(no),
  348. bmipspro=true; AC_MSG_RESULT(yes))
  349. if test "$bmipspro" = "true"; then
  350. CFLAGS="$CFLAGS -c99"
  351. fi
  352. AC_C_BIGENDIAN
  353. if test "x$enable_rust" = "xyes"; then
  354. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  355. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  356. if test "x$RUSTC" = "xno"; then
  357. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  358. fi
  359. AC_ARG_VAR([CARGO], [path to the cargo binary])
  360. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  361. if test "x$CARGO" = "xno"; then
  362. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  363. fi
  364. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  365. if test "x$enable_cargo_online_mode" = "xyes"; then
  366. CARGO_ONLINE=
  367. RUST_DL=#
  368. else
  369. CARGO_ONLINE=--frozen
  370. RUST_DL=
  371. dnl When we're not allowed to touch the network, we need crate dependencies
  372. dnl locally available.
  373. AC_MSG_CHECKING([rust crate dependencies])
  374. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  375. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  376. TOR_RUST_DEPENDENCIES="$srcdir/src/ext/rust/"
  377. NEED_MOD=1
  378. fi
  379. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  380. 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.])
  381. ERRORED=1
  382. fi
  383. for dep in $rust_crates; do
  384. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  385. 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.])
  386. ERRORED=1
  387. fi
  388. done
  389. if test "x$NEED_MOD" = "x1"; then
  390. dnl When looking for dependencies from cargo, pick right directory
  391. TOR_RUST_DEPENDENCIES="../../src/ext/rust"
  392. fi
  393. if test "x$ERRORED" = "x"; then
  394. AC_MSG_RESULT([yes])
  395. fi
  396. fi
  397. dnl This is a workaround for #46797
  398. dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ). Once the
  399. dnl upstream bug is fixed, we can remove this workaround.
  400. case "$host_os" in
  401. darwin*)
  402. TOR_RUST_EXTRA_LIBS="-lresolv"
  403. ;;
  404. esac
  405. dnl For now both MSVC and MinGW rust libraries will output static libs with
  406. dnl the MSVC naming convention.
  407. if test "$bwin32" = "true"; then
  408. TOR_RUST_STATIC_NAME=tor_rust.lib
  409. else
  410. TOR_RUST_STATIC_NAME=libtor_rust.a
  411. fi
  412. AC_SUBST(TOR_RUST_STATIC_NAME)
  413. AC_SUBST(CARGO_ONLINE)
  414. AC_SUBST(RUST_DL)
  415. dnl Let's check the rustc version, too
  416. AC_MSG_CHECKING([rust version])
  417. RUSTC_VERSION=`$RUSTC --version`
  418. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  419. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  420. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  421. AC_MSG_ERROR([rustc version couldn't be identified])
  422. fi
  423. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  424. AC_MSG_ERROR([rustc must be at least version 1.14])
  425. fi
  426. AC_MSG_RESULT([$RUSTC_VERSION])
  427. fi
  428. AC_SUBST(TOR_RUST_EXTRA_LIBS)
  429. AC_SEARCH_LIBS(socket, [socket network])
  430. AC_SEARCH_LIBS(gethostbyname, [nsl])
  431. AC_SEARCH_LIBS(dlopen, [dl])
  432. AC_SEARCH_LIBS(inet_aton, [resolv])
  433. AC_SEARCH_LIBS(backtrace, [execinfo])
  434. saved_LIBS="$LIBS"
  435. AC_SEARCH_LIBS([clock_gettime], [rt])
  436. if test "$LIBS" != "$saved_LIBS"; then
  437. # Looks like we need -lrt for clock_gettime().
  438. have_rt=yes
  439. fi
  440. AC_SEARCH_LIBS(pthread_create, [pthread])
  441. AC_SEARCH_LIBS(pthread_detach, [pthread])
  442. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  443. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  444. AC_CHECK_FUNCS(
  445. _NSGetEnviron \
  446. RtlSecureZeroMemory \
  447. SecureZeroMemory \
  448. accept4 \
  449. backtrace \
  450. backtrace_symbols_fd \
  451. eventfd \
  452. explicit_bzero \
  453. timingsafe_memcmp \
  454. flock \
  455. ftime \
  456. get_current_dir_name \
  457. getaddrinfo \
  458. getifaddrs \
  459. getpass \
  460. getrlimit \
  461. gettimeofday \
  462. gmtime_r \
  463. gnu_get_libc_version \
  464. htonll \
  465. inet_aton \
  466. ioctl \
  467. issetugid \
  468. llround \
  469. localtime_r \
  470. lround \
  471. mach_approximate_time \
  472. memmem \
  473. memset_s \
  474. pipe \
  475. pipe2 \
  476. prctl \
  477. readpassphrase \
  478. rint \
  479. sigaction \
  480. socketpair \
  481. statvfs \
  482. strlcat \
  483. strlcpy \
  484. strnlen \
  485. strptime \
  486. strtok_r \
  487. strtoull \
  488. sysconf \
  489. sysctl \
  490. truncate \
  491. uname \
  492. usleep \
  493. vasprintf \
  494. _vscprintf
  495. )
  496. # Apple messed up when they added two functions functions in Sierra: they
  497. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  498. # checks. So we should only probe for those functions if we are sure that we
  499. # are not targeting OSX 10.11 or earlier.
  500. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  501. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  502. #ifdef __APPLE__
  503. # include <AvailabilityMacros.h>
  504. # ifndef MAC_OS_X_VERSION_10_12
  505. # define MAC_OS_X_VERSION_10_12 101200
  506. # endif
  507. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  508. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  509. # error "Running on Mac OSX 10.11 or earlier"
  510. # endif
  511. # endif
  512. #endif
  513. ]], [[]])],
  514. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  515. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  516. if test "$on_macos_pre_10_12" = "no"; then
  517. AC_CHECK_FUNCS(
  518. clock_gettime \
  519. getentropy \
  520. )
  521. fi
  522. if test "$bwin32" != "true"; then
  523. AC_CHECK_HEADERS(pthread.h)
  524. AC_CHECK_FUNCS(pthread_create)
  525. AC_CHECK_FUNCS(pthread_condattr_setclock)
  526. fi
  527. if test "$bwin32" = "true"; then
  528. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  529. #include <windows.h>
  530. #include <conio.h>
  531. #include <wchar.h>
  532. ])
  533. fi
  534. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  535. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  536. dnl ------------------------------------------------------
  537. dnl Where do you live, libevent? And how do we call you?
  538. if test "$bwin32" = "true"; then
  539. TOR_LIB_WS32=-lws2_32
  540. TOR_LIB_IPHLPAPI=-liphlpapi
  541. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  542. # think it's actually necessary.
  543. TOR_LIB_GDI=-lgdi32
  544. TOR_LIB_USERENV=-luserenv
  545. else
  546. TOR_LIB_WS32=
  547. TOR_LIB_GDI=
  548. TOR_LIB_USERENV=
  549. fi
  550. AC_SUBST(TOR_LIB_WS32)
  551. AC_SUBST(TOR_LIB_GDI)
  552. AC_SUBST(TOR_LIB_IPHLPAPI)
  553. AC_SUBST(TOR_LIB_USERENV)
  554. tor_libevent_pkg_redhat="libevent"
  555. tor_libevent_pkg_debian="libevent-dev"
  556. tor_libevent_devpkg_redhat="libevent-devel"
  557. tor_libevent_devpkg_debian="libevent-dev"
  558. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  559. dnl linking for static builds.
  560. STATIC_LIBEVENT_FLAGS=""
  561. if test "$enable_static_libevent" = "yes"; then
  562. if test "$have_rt" = "yes"; then
  563. STATIC_LIBEVENT_FLAGS=" -lrt "
  564. fi
  565. fi
  566. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  567. #ifdef _WIN32
  568. #include <winsock2.h>
  569. #endif
  570. #include <sys/time.h>
  571. #include <sys/types.h>
  572. #include <event2/event.h>], [
  573. #ifdef _WIN32
  574. #include <winsock2.h>
  575. #endif
  576. struct event_base;
  577. struct event_base *event_base_new(void);
  578. void event_base_free(struct event_base *);],
  579. [
  580. #ifdef _WIN32
  581. {WSADATA d; WSAStartup(0x101,&d); }
  582. #endif
  583. event_base_free(event_base_new());
  584. ], [--with-libevent-dir], [/opt/libevent])
  585. dnl Determine the incantation needed to link libevent.
  586. save_LIBS="$LIBS"
  587. save_LDFLAGS="$LDFLAGS"
  588. save_CPPFLAGS="$CPPFLAGS"
  589. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  590. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  591. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  592. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  593. if test "$enable_static_libevent" = "yes"; then
  594. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  595. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  596. else
  597. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  598. fi
  599. else
  600. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  601. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  602. 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"))
  603. if test "$ac_cv_search_event_new" != "none required"; then
  604. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  605. fi
  606. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  607. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  608. fi
  609. else
  610. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  611. fi
  612. fi
  613. dnl Now check for particular libevent functions.
  614. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  615. evutil_secure_rng_add_bytes \
  616. ])
  617. LIBS="$save_LIBS"
  618. LDFLAGS="$save_LDFLAGS"
  619. CPPFLAGS="$save_CPPFLAGS"
  620. dnl Check that libevent is at least at version 2.0.10, the first stable
  621. dnl release of its series
  622. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  623. AC_MSG_CHECKING([whether Libevent is new enough])
  624. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  625. #include <event2/event.h>
  626. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  627. #error
  628. int x = y(zz);
  629. #else
  630. int x = 1;
  631. #endif
  632. ])], [ AC_MSG_RESULT([yes]) ],
  633. [ AC_MSG_RESULT([no])
  634. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  635. LIBS="$save_LIBS"
  636. LDFLAGS="$save_LDFLAGS"
  637. CPPFLAGS="$save_CPPFLAGS"
  638. AC_SUBST(TOR_LIBEVENT_LIBS)
  639. dnl ------------------------------------------------------
  640. dnl Where do you live, libm?
  641. dnl On some platforms (Haiku/BeOS) the math library is
  642. dnl part of libroot. In which case don't link against lm
  643. TOR_LIB_MATH=""
  644. save_LIBS="$LIBS"
  645. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  646. if test "$ac_cv_search_pow" != "none required"; then
  647. TOR_LIB_MATH="$ac_cv_search_pow"
  648. fi
  649. LIBS="$save_LIBS"
  650. AC_SUBST(TOR_LIB_MATH)
  651. dnl ------------------------------------------------------
  652. dnl Where do you live, openssl? And how do we call you?
  653. tor_openssl_pkg_redhat="openssl"
  654. tor_openssl_pkg_debian="libssl-dev"
  655. tor_openssl_devpkg_redhat="openssl-devel"
  656. tor_openssl_devpkg_debian="libssl-dev"
  657. ALT_openssl_WITHVAL=""
  658. AC_ARG_WITH(ssl-dir,
  659. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  660. [
  661. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  662. ALT_openssl_WITHVAL="$withval"
  663. fi
  664. ])
  665. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  666. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  667. [#include <openssl/ssl.h>],
  668. [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
  669. [TLSv1_1_method();], [],
  670. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  671. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  672. if test "$enable_static_openssl" = "yes"; then
  673. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  674. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  675. else
  676. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  677. fi
  678. else
  679. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  680. fi
  681. AC_SUBST(TOR_OPENSSL_LIBS)
  682. dnl Now check for particular openssl functions.
  683. save_LIBS="$LIBS"
  684. save_LDFLAGS="$LDFLAGS"
  685. save_CPPFLAGS="$CPPFLAGS"
  686. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  687. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  688. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  689. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  690. #include <openssl/opensslv.h>
  691. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  692. #error "too old"
  693. #endif
  694. ]], [[]])],
  695. [ : ],
  696. [ 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.]) ])
  697. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  698. #include <openssl/opensslv.h>
  699. #include <openssl/evp.h>
  700. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  701. #error "no ECC"
  702. #endif
  703. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  704. #error "curves unavailable"
  705. #endif
  706. ]], [[]])],
  707. [ : ],
  708. [ 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.]) ])
  709. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  710. [#include <openssl/ssl.h>
  711. ])
  712. AC_CHECK_FUNCS([ \
  713. SSL_SESSION_get_master_key \
  714. SSL_get_server_random \
  715. SSL_get_client_ciphers \
  716. SSL_get_client_random \
  717. SSL_CIPHER_find \
  718. TLS_method
  719. ])
  720. dnl Check if OpenSSL has scrypt implementation.
  721. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  722. dnl Check if OpenSSL structures are opaque
  723. AC_CHECK_MEMBERS([SSL.state], , ,
  724. [#include <openssl/ssl.h>
  725. ])
  726. dnl Define the set of checks for KIST scheduler support.
  727. AC_DEFUN([CHECK_KIST_SUPPORT],[
  728. dnl KIST needs struct tcp_info and for certain members to exist.
  729. AC_CHECK_MEMBERS(
  730. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  731. , ,[[#include <netinet/tcp.h>]])
  732. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  733. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  734. #include <linux/sockios.h>
  735. #ifndef SIOCOUTQNSD
  736. #error
  737. #endif
  738. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  739. if test "x$have_siocoutqnsd" = "xyes"; then
  740. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  741. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  742. have_kist_support=yes
  743. fi
  744. fi
  745. fi
  746. ])
  747. dnl Now, trigger the check.
  748. CHECK_KIST_SUPPORT
  749. AS_IF([test "x$have_kist_support" = "xyes"],
  750. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  751. on this system])],
  752. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  753. LIBS="$save_LIBS"
  754. LDFLAGS="$save_LDFLAGS"
  755. CPPFLAGS="$save_CPPFLAGS"
  756. dnl ------------------------------------------------------
  757. dnl Where do you live, zlib? And how do we call you?
  758. tor_zlib_pkg_redhat="zlib"
  759. tor_zlib_pkg_debian="zlib1g"
  760. tor_zlib_devpkg_redhat="zlib-devel"
  761. tor_zlib_devpkg_debian="zlib1g-dev"
  762. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  763. [#include <zlib.h>],
  764. [const char * zlibVersion(void);],
  765. [zlibVersion();], [--with-zlib-dir],
  766. [/opt/zlib])
  767. if test "$enable_static_zlib" = "yes"; then
  768. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  769. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  770. using --enable-static-zlib")
  771. else
  772. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  773. fi
  774. else
  775. TOR_ZLIB_LIBS="-lz"
  776. fi
  777. AC_SUBST(TOR_ZLIB_LIBS)
  778. dnl ------------------------------------------------------
  779. dnl Where we do we find lzma?
  780. AC_ARG_ENABLE(lzma,
  781. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  782. [case "${enableval}" in
  783. "yes") lzma=true ;;
  784. "no") lzma=false ;;
  785. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  786. esac], [lzma=auto])
  787. if test "x$enable_lzma" = "xno"; then
  788. have_lzma=no;
  789. else
  790. PKG_CHECK_MODULES([LZMA],
  791. [liblzma],
  792. have_lzma=yes,
  793. have_lzma=no)
  794. if test "x$have_lzma" = "xno" ; then
  795. AC_MSG_WARN([Unable to find liblzma.])
  796. fi
  797. fi
  798. if test "x$have_lzma" = "xyes"; then
  799. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  800. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  801. TOR_LZMA_LIBS="${LZMA_LIBS}"
  802. fi
  803. AC_SUBST(TOR_LZMA_CFLAGS)
  804. AC_SUBST(TOR_LZMA_LIBS)
  805. dnl ------------------------------------------------------
  806. dnl Where we do we find zstd?
  807. AC_ARG_ENABLE(zstd,
  808. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  809. [case "${enableval}" in
  810. "yes") zstd=true ;;
  811. "no") zstd=false ;;
  812. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  813. esac], [zstd=auto])
  814. if test "x$enable_zstd" = "xno"; then
  815. have_zstd=no;
  816. else
  817. PKG_CHECK_MODULES([ZSTD],
  818. [libzstd >= 1.1],
  819. have_zstd=yes,
  820. have_zstd=no)
  821. if test "x$have_zstd" = "xno" ; then
  822. AC_MSG_WARN([Unable to find libzstd.])
  823. fi
  824. fi
  825. if test "x$have_zstd" = "xyes"; then
  826. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  827. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  828. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  829. fi
  830. AC_SUBST(TOR_ZSTD_CFLAGS)
  831. AC_SUBST(TOR_ZSTD_LIBS)
  832. dnl ----------------------------------------------------------------------
  833. dnl Check if libcap is available for capabilities.
  834. tor_cap_pkg_debian="libcap2"
  835. tor_cap_pkg_redhat="libcap"
  836. tor_cap_devpkg_debian="libcap-dev"
  837. tor_cap_devpkg_redhat="libcap-devel"
  838. AC_CHECK_LIB([cap], [cap_init], [],
  839. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  840. )
  841. AC_CHECK_FUNCS(cap_set_proc)
  842. dnl ---------------------------------------------------------------------
  843. dnl Now that we know about our major libraries, we can check for compiler
  844. dnl and linker hardening options. We need to do this with the libraries known,
  845. dnl since sometimes the linker will like an option but not be willing to
  846. dnl use it with a build of a library.
  847. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  848. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  849. CFLAGS_FTRAPV=
  850. CFLAGS_FWRAPV=
  851. CFLAGS_ASAN=
  852. CFLAGS_UBSAN=
  853. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  854. #if !defined(__clang__)
  855. #error
  856. #endif])], have_clang=yes, have_clang=no)
  857. if test "x$enable_gcc_hardening" != "xno"; then
  858. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  859. if test "x$have_clang" = "xyes"; then
  860. TOR_CHECK_CFLAGS(-Qunused-arguments)
  861. fi
  862. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  863. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  864. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  865. m4_ifdef([AS_VAR_IF],[
  866. AS_VAR_IF(can_compile, [yes],
  867. AS_VAR_IF(can_link, [yes],
  868. [],
  869. 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.)]))
  870. )])
  871. AS_VAR_POPDEF([can_link])
  872. AS_VAR_POPDEF([can_compile])
  873. TOR_CHECK_CFLAGS(-Wstack-protector)
  874. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  875. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  876. TOR_CHECK_CFLAGS(-fPIE)
  877. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  878. fi
  879. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  880. fi
  881. if test "$fragile_hardening" = "yes"; then
  882. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  883. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  884. 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.])
  885. fi
  886. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  887. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  888. fi
  889. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  890. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  891. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  892. fi
  893. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  894. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  895. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  896. fi
  897. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  898. fi
  899. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  900. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  901. mulodi_fixes_ftrapv=no
  902. if test "$have_clang" = "yes"; then
  903. saved_CFLAGS="$CFLAGS"
  904. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  905. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  906. AC_LINK_IFELSE([
  907. AC_LANG_SOURCE([[
  908. #include <stdint.h>
  909. #include <stdlib.h>
  910. int main(int argc, char **argv)
  911. {
  912. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  913. * (int64_t)atoi(argv[3]);
  914. return x == 9;
  915. } ]])],
  916. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  917. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  918. if test "$ftrapv_can_link" = "no"; then
  919. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  920. AC_LINK_IFELSE([
  921. AC_LANG_SOURCE([[
  922. #include <stdint.h>
  923. #include <stdlib.h>
  924. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  925. *overflow=0;
  926. return a;
  927. }
  928. int main(int argc, char **argv)
  929. {
  930. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  931. * (int64_t)atoi(argv[3]);
  932. return x == 9;
  933. } ]])],
  934. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  935. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  936. fi
  937. CFLAGS="$saved_CFLAGS"
  938. fi
  939. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  940. dnl These cflags add bunches of branches, and we haven't been able to
  941. dnl persuade ourselves that they're suitable for code that needs to be
  942. dnl constant time.
  943. AC_SUBST(CFLAGS_BUGTRAP)
  944. dnl These cflags are variant ones sutable for code that needs to be
  945. dnl constant-time.
  946. AC_SUBST(CFLAGS_CONSTTIME)
  947. if test "x$enable_linker_hardening" != "xno"; then
  948. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  949. fi
  950. # For backtrace support
  951. TOR_CHECK_LDFLAGS(-rdynamic)
  952. dnl ------------------------------------------------------
  953. dnl Now see if we have a -fomit-frame-pointer compiler option.
  954. saved_CFLAGS="$CFLAGS"
  955. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  956. F_OMIT_FRAME_POINTER=''
  957. if test "$saved_CFLAGS" != "$CFLAGS"; then
  958. if test "$fragile_hardening" = "yes"; then
  959. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  960. fi
  961. fi
  962. CFLAGS="$saved_CFLAGS"
  963. AC_SUBST(F_OMIT_FRAME_POINTER)
  964. dnl ------------------------------------------------------
  965. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  966. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  967. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  968. dnl code will work.
  969. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  970. dnl ============================================================
  971. dnl Check for libseccomp
  972. if test "x$enable_seccomp" != "xno"; then
  973. AC_CHECK_HEADERS([seccomp.h])
  974. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  975. fi
  976. dnl ============================================================
  977. dnl Check for libscrypt
  978. if test "x$enable_libscrypt" != "xno"; then
  979. AC_CHECK_HEADERS([libscrypt.h])
  980. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  981. AC_CHECK_FUNCS([libscrypt_scrypt])
  982. fi
  983. dnl ============================================================
  984. dnl We need an implementation of curve25519.
  985. dnl set these defaults.
  986. build_curve25519_donna=no
  987. build_curve25519_donna_c64=no
  988. use_curve25519_donna=no
  989. use_curve25519_nacl=no
  990. CURVE25519_LIBS=
  991. dnl The best choice is using curve25519-donna-c64, but that requires
  992. dnl that we
  993. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  994. tor_cv_can_use_curve25519_donna_c64,
  995. [AC_RUN_IFELSE(
  996. [AC_LANG_PROGRAM([dnl
  997. #include <stdint.h>
  998. typedef unsigned uint128_t __attribute__((mode(TI)));
  999. int func(uint64_t a, uint64_t b) {
  1000. uint128_t c = ((uint128_t)a) * b;
  1001. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1002. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1003. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1004. (((uint64_t)(c))&0xffffffffL) == 0;
  1005. return ok;
  1006. }
  1007. ], [dnl
  1008. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1009. ((uint64_t)1234567890) << 24);
  1010. return !ok;
  1011. ])],
  1012. [tor_cv_can_use_curve25519_donna_c64=yes],
  1013. [tor_cv_can_use_curve25519_donna_c64=no],
  1014. [AC_LINK_IFELSE(
  1015. [AC_LANG_PROGRAM([dnl
  1016. #include <stdint.h>
  1017. typedef unsigned uint128_t __attribute__((mode(TI)));
  1018. int func(uint64_t a, uint64_t b) {
  1019. uint128_t c = ((uint128_t)a) * b;
  1020. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1021. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1022. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1023. (((uint64_t)(c))&0xffffffffL) == 0;
  1024. return ok;
  1025. }
  1026. ], [dnl
  1027. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1028. ((uint64_t)1234567890) << 24);
  1029. return !ok;
  1030. ])],
  1031. [tor_cv_can_use_curve25519_donna_c64=cross],
  1032. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1033. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1034. nacl/crypto_scalarmult_curve25519.h])
  1035. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1036. tor_cv_can_use_curve25519_nacl,
  1037. [tor_saved_LIBS="$LIBS"
  1038. LIBS="$LIBS -lnacl"
  1039. AC_LINK_IFELSE(
  1040. [AC_LANG_PROGRAM([dnl
  1041. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1042. #include <crypto_scalarmult_curve25519.h>
  1043. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1044. #include <nacl/crypto_scalarmult_curve25519.h>
  1045. #endif
  1046. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1047. #error Hey, this is the reference implementation! That's not fast.
  1048. #endif
  1049. ], [
  1050. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1051. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1052. [tor_cv_can_use_curve25519_nacl=no])
  1053. LIBS="$tor_saved_LIBS" ])
  1054. dnl Okay, now we need to figure out which one to actually use. Fall back
  1055. dnl to curve25519-donna.c
  1056. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1057. build_curve25519_donna_c64=yes
  1058. use_curve25519_donna=yes
  1059. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1060. use_curve25519_nacl=yes
  1061. CURVE25519_LIBS=-lnacl
  1062. else
  1063. build_curve25519_donna=yes
  1064. use_curve25519_donna=yes
  1065. fi
  1066. if test "x$use_curve25519_donna" = "xyes"; then
  1067. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1068. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1069. fi
  1070. if test "x$use_curve25519_nacl" = "xyes"; then
  1071. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1072. [Defined if we should use a curve25519 from nacl])
  1073. fi
  1074. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1075. test "x$build_curve25519_donna" = "xyes")
  1076. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1077. test "x$build_curve25519_donna_c64" = "xyes")
  1078. AC_SUBST(CURVE25519_LIBS)
  1079. dnl Make sure to enable support for large off_t if available.
  1080. AC_SYS_LARGEFILE
  1081. AC_CHECK_HEADERS([assert.h \
  1082. errno.h \
  1083. fcntl.h \
  1084. signal.h \
  1085. string.h \
  1086. sys/capability.h \
  1087. sys/fcntl.h \
  1088. sys/stat.h \
  1089. sys/time.h \
  1090. sys/types.h \
  1091. time.h \
  1092. unistd.h \
  1093. arpa/inet.h \
  1094. crt_externs.h \
  1095. execinfo.h \
  1096. gnu/libc-version.h \
  1097. grp.h \
  1098. ifaddrs.h \
  1099. inttypes.h \
  1100. limits.h \
  1101. linux/types.h \
  1102. machine/limits.h \
  1103. malloc.h \
  1104. malloc/malloc.h \
  1105. malloc_np.h \
  1106. netdb.h \
  1107. netinet/in.h \
  1108. netinet/in6.h \
  1109. pwd.h \
  1110. readpassphrase.h \
  1111. stdint.h \
  1112. stdatomic.h \
  1113. sys/eventfd.h \
  1114. sys/file.h \
  1115. sys/ioctl.h \
  1116. sys/limits.h \
  1117. sys/mman.h \
  1118. sys/param.h \
  1119. sys/prctl.h \
  1120. sys/random.h \
  1121. sys/resource.h \
  1122. sys/select.h \
  1123. sys/socket.h \
  1124. sys/statvfs.h \
  1125. sys/syscall.h \
  1126. sys/sysctl.h \
  1127. sys/syslimits.h \
  1128. sys/time.h \
  1129. sys/types.h \
  1130. sys/un.h \
  1131. sys/utime.h \
  1132. sys/wait.h \
  1133. syslog.h \
  1134. utime.h])
  1135. AC_CHECK_HEADERS(sys/param.h)
  1136. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1137. [#ifdef HAVE_SYS_TYPES_H
  1138. #include <sys/types.h>
  1139. #endif
  1140. #ifdef HAVE_SYS_SOCKET_H
  1141. #include <sys/socket.h>
  1142. #endif])
  1143. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1144. [#ifdef HAVE_SYS_TYPES_H
  1145. #include <sys/types.h>
  1146. #endif
  1147. #ifdef HAVE_SYS_SOCKET_H
  1148. #include <sys/socket.h>
  1149. #endif
  1150. #ifdef HAVE_NET_IF_H
  1151. #include <net/if.h>
  1152. #endif
  1153. #ifdef HAVE_NETINET_IN_H
  1154. #include <netinet/in.h>
  1155. #endif])
  1156. AC_CHECK_HEADERS(linux/if.h,[],[],
  1157. [
  1158. #ifdef HAVE_SYS_SOCKET_H
  1159. #include <sys/socket.h>
  1160. #endif
  1161. ])
  1162. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1163. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1164. [#ifdef HAVE_SYS_TYPES_H
  1165. #include <sys/types.h>
  1166. #endif
  1167. #ifdef HAVE_SYS_SOCKET_H
  1168. #include <sys/socket.h>
  1169. #endif
  1170. #ifdef HAVE_LIMITS_H
  1171. #include <limits.h>
  1172. #endif
  1173. #ifdef HAVE_LINUX_TYPES_H
  1174. #include <linux/types.h>
  1175. #endif
  1176. #ifdef HAVE_NETINET_IN6_H
  1177. #include <netinet/in6.h>
  1178. #endif
  1179. #ifdef HAVE_NETINET_IN_H
  1180. #include <netinet/in.h>
  1181. #endif])
  1182. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1183. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1184. [#ifdef HAVE_SYS_TYPES_H
  1185. #include <sys/types.h>
  1186. #endif
  1187. #ifdef HAVE_SYS_SOCKET_H
  1188. #include <sys/socket.h>
  1189. #endif
  1190. #ifdef HAVE_LIMITS_H
  1191. #include <limits.h>
  1192. #endif
  1193. #ifdef HAVE_LINUX_TYPES_H
  1194. #include <linux/types.h>
  1195. #endif
  1196. #ifdef HAVE_NETINET_IN6_H
  1197. #include <netinet/in6.h>
  1198. #endif
  1199. #ifdef HAVE_NETINET_IN_H
  1200. #include <netinet/in.h>
  1201. #endif
  1202. #ifdef HAVE_LINUX_IF_H
  1203. #include <linux/if.h>
  1204. #endif])
  1205. transparent_ok=0
  1206. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1207. transparent_ok=1
  1208. fi
  1209. if test "x$linux_netfilter_ipv4" = "x1"; then
  1210. transparent_ok=1
  1211. fi
  1212. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1213. transparent_ok=1
  1214. fi
  1215. if test "x$transparent_ok" = "x1"; then
  1216. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1217. else
  1218. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1219. fi
  1220. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1221. [#ifdef HAVE_SYS_TYPES_H
  1222. #include <sys/types.h>
  1223. #endif
  1224. #ifdef HAVE_SYS_TIME_H
  1225. #include <sys/time.h>
  1226. #endif])
  1227. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1228. dnl Watch out.
  1229. AC_CHECK_SIZEOF(int8_t)
  1230. AC_CHECK_SIZEOF(int16_t)
  1231. AC_CHECK_SIZEOF(int32_t)
  1232. AC_CHECK_SIZEOF(int64_t)
  1233. AC_CHECK_SIZEOF(uint8_t)
  1234. AC_CHECK_SIZEOF(uint16_t)
  1235. AC_CHECK_SIZEOF(uint32_t)
  1236. AC_CHECK_SIZEOF(uint64_t)
  1237. AC_CHECK_SIZEOF(intptr_t)
  1238. AC_CHECK_SIZEOF(uintptr_t)
  1239. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1240. AC_CHECK_SIZEOF(char)
  1241. AC_CHECK_SIZEOF(short)
  1242. AC_CHECK_SIZEOF(int)
  1243. AC_CHECK_SIZEOF(long)
  1244. AC_CHECK_SIZEOF(long long)
  1245. AC_CHECK_SIZEOF(__int64)
  1246. AC_CHECK_SIZEOF(void *)
  1247. AC_CHECK_SIZEOF(time_t)
  1248. AC_CHECK_SIZEOF(size_t)
  1249. AC_CHECK_SIZEOF(pid_t)
  1250. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1251. AC_PC_FROM_UCONTEXT([:])
  1252. dnl used to include sockaddr_storage, but everybody has that.
  1253. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1254. [#ifdef HAVE_SYS_TYPES_H
  1255. #include <sys/types.h>
  1256. #endif
  1257. #ifdef HAVE_NETINET_IN_H
  1258. #include <netinet/in.h>
  1259. #endif
  1260. #ifdef HAVE_NETINET_IN6_H
  1261. #include <netinet/in6.h>
  1262. #endif
  1263. #ifdef HAVE_SYS_SOCKET_H
  1264. #include <sys/socket.h>
  1265. #endif
  1266. #ifdef _WIN32
  1267. #define _WIN32_WINNT 0x0501
  1268. #define WIN32_LEAN_AND_MEAN
  1269. #include <winsock2.h>
  1270. #include <ws2tcpip.h>
  1271. #endif
  1272. ])
  1273. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1274. [#ifdef HAVE_SYS_TYPES_H
  1275. #include <sys/types.h>
  1276. #endif
  1277. #ifdef HAVE_NETINET_IN_H
  1278. #include <netinet/in.h>
  1279. #endif
  1280. #ifdef HAVE_NETINET_IN6_H
  1281. #include <netinet/in6.h>
  1282. #endif
  1283. #ifdef HAVE_SYS_SOCKET_H
  1284. #include <sys/socket.h>
  1285. #endif
  1286. #ifdef _WIN32
  1287. #define _WIN32_WINNT 0x0501
  1288. #define WIN32_LEAN_AND_MEAN
  1289. #include <winsock2.h>
  1290. #include <ws2tcpip.h>
  1291. #endif
  1292. ])
  1293. AC_CHECK_TYPES([rlim_t], , ,
  1294. [#ifdef HAVE_SYS_TYPES_H
  1295. #include <sys/types.h>
  1296. #endif
  1297. #ifdef HAVE_SYS_TIME_H
  1298. #include <sys/time.h>
  1299. #endif
  1300. #ifdef HAVE_SYS_RESOURCE_H
  1301. #include <sys/resource.h>
  1302. #endif
  1303. ])
  1304. AX_CHECK_SIGN([time_t],
  1305. [ : ],
  1306. [ : ], [
  1307. #ifdef HAVE_SYS_TYPES_H
  1308. #include <sys/types.h>
  1309. #endif
  1310. #ifdef HAVE_SYS_TIME_H
  1311. #include <sys/time.h>
  1312. #endif
  1313. #ifdef HAVE_TIME_H
  1314. #include <time.h>
  1315. #endif
  1316. ])
  1317. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1318. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1319. fi
  1320. AX_CHECK_SIGN([size_t],
  1321. [ tor_cv_size_t_signed=yes ],
  1322. [ tor_cv_size_t_signed=no ], [
  1323. #ifdef HAVE_SYS_TYPES_H
  1324. #include <sys/types.h>
  1325. #endif
  1326. ])
  1327. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1328. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1329. fi
  1330. AX_CHECK_SIGN([enum always],
  1331. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1332. [ : ], [
  1333. enum always { AAA, BBB, CCC };
  1334. ])
  1335. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1336. #ifdef HAVE_SYS_SOCKET_H
  1337. #include <sys/socket.h>
  1338. #endif
  1339. ])
  1340. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1341. AC_CHECK_SIZEOF(cell_t)
  1342. # Now make sure that NULL can be represented as zero bytes.
  1343. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1344. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1345. [[#include <stdlib.h>
  1346. #include <string.h>
  1347. #include <stdio.h>
  1348. #ifdef HAVE_STDDEF_H
  1349. #include <stddef.h>
  1350. #endif
  1351. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1352. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1353. [tor_cv_null_is_zero=yes],
  1354. [tor_cv_null_is_zero=no],
  1355. [tor_cv_null_is_zero=cross])])
  1356. if test "$tor_cv_null_is_zero" = "cross"; then
  1357. # Cross-compiling; let's hope that the target isn't raving mad.
  1358. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1359. fi
  1360. if test "$tor_cv_null_is_zero" != "no"; then
  1361. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1362. [Define to 1 iff memset(0) sets pointers to NULL])
  1363. fi
  1364. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1365. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1366. [[#include <stdlib.h>
  1367. #include <string.h>
  1368. #include <stdio.h>
  1369. #ifdef HAVE_STDDEF_H
  1370. #include <stddef.h>
  1371. #endif
  1372. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1373. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1374. [tor_cv_dbl0_is_zero=yes],
  1375. [tor_cv_dbl0_is_zero=no],
  1376. [tor_cv_dbl0_is_zero=cross])])
  1377. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1378. # Cross-compiling; let's hope that the target isn't raving mad.
  1379. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1380. fi
  1381. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1382. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1383. [Define to 1 iff memset(0) sets doubles to 0.0])
  1384. fi
  1385. # And what happens when we malloc zero?
  1386. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1387. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1388. [[#include <stdlib.h>
  1389. #include <string.h>
  1390. #include <stdio.h>
  1391. #ifdef HAVE_STDDEF_H
  1392. #include <stddef.h>
  1393. #endif
  1394. int main () { return malloc(0)?0:1; }]])],
  1395. [tor_cv_malloc_zero_works=yes],
  1396. [tor_cv_malloc_zero_works=no],
  1397. [tor_cv_malloc_zero_works=cross])])
  1398. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1399. # Cross-compiling; let's hope that the target isn't raving mad.
  1400. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1401. fi
  1402. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1403. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1404. [Define to 1 iff malloc(0) returns a pointer])
  1405. fi
  1406. # whether we seem to be in a 2s-complement world.
  1407. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1408. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1409. [[int main () { int problem = ((-99) != (~99)+1);
  1410. return problem ? 1 : 0; }]])],
  1411. [tor_cv_twos_complement=yes],
  1412. [tor_cv_twos_complement=no],
  1413. [tor_cv_twos_complement=cross])])
  1414. if test "$tor_cv_twos_complement" = "cross"; then
  1415. # Cross-compiling; let's hope that the target isn't raving mad.
  1416. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1417. fi
  1418. if test "$tor_cv_twos_complement" != "no"; then
  1419. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1420. [Define to 1 iff we represent negative integers with
  1421. two's complement])
  1422. fi
  1423. # What does shifting a negative value do?
  1424. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1425. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1426. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1427. [tor_cv_sign_extend=yes],
  1428. [tor_cv_sign_extend=no],
  1429. [tor_cv_sign_extend=cross])])
  1430. if test "$tor_cv_sign_extend" = "cross"; then
  1431. # Cross-compiling; let's hope that the target isn't raving mad.
  1432. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1433. fi
  1434. if test "$tor_cv_sign_extend" != "no"; then
  1435. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1436. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1437. fi
  1438. # Is uint8_t the same type as unsigned char?
  1439. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1440. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1441. #include <stdint.h>
  1442. extern uint8_t c;
  1443. unsigned char c;]])],
  1444. [tor_cv_uint8_uchar=yes],
  1445. [tor_cv_uint8_uchar=no],
  1446. [tor_cv_uint8_uchar=cross])])
  1447. if test "$tor_cv_uint8_uchar" = "cross"; then
  1448. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1449. fi
  1450. if test "$tor_cv_uint8_uchar" = "no"; then
  1451. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1452. fi
  1453. # Whether we should use the dmalloc memory allocation debugging library.
  1454. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1455. AC_ARG_WITH(dmalloc,
  1456. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1457. [if [[ "$withval" = "yes" ]]; then
  1458. dmalloc=1
  1459. AC_MSG_RESULT(yes)
  1460. else
  1461. dmalloc=1
  1462. AC_MSG_RESULT(no)
  1463. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1464. )
  1465. if [[ $dmalloc -eq 1 ]]; then
  1466. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1467. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1468. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1469. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1470. fi
  1471. AC_ARG_WITH(tcmalloc,
  1472. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1473. [ tcmalloc=yes ], [ tcmalloc=no ])
  1474. if test "x$tcmalloc" = "xyes"; then
  1475. LDFLAGS="-ltcmalloc $LDFLAGS"
  1476. fi
  1477. using_custom_malloc=no
  1478. if test "x$enable_openbsd_malloc" = "xyes"; then
  1479. using_custom_malloc=yes
  1480. fi
  1481. if test "x$tcmalloc" = "xyes"; then
  1482. using_custom_malloc=yes
  1483. fi
  1484. if test "$using_custom_malloc" = "no"; then
  1485. AC_CHECK_FUNCS(mallinfo)
  1486. fi
  1487. # By default, we're going to assume we don't have mlockall()
  1488. # bionic and other platforms have various broken mlockall subsystems.
  1489. # Some systems don't have a working mlockall, some aren't linkable,
  1490. # and some have it but don't declare it.
  1491. AC_CHECK_FUNCS(mlockall)
  1492. AC_CHECK_DECLS([mlockall], , , [
  1493. #ifdef HAVE_SYS_MMAN_H
  1494. #include <sys/mman.h>
  1495. #endif])
  1496. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1497. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1498. # using macros
  1499. AC_CHECK_DECLS([getpagesize], , , [
  1500. #ifdef HAVE_UNISTD_H
  1501. #include <unistd.h>
  1502. #endif])
  1503. # Allow user to specify an alternate syslog facility
  1504. AC_ARG_WITH(syslog-facility,
  1505. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1506. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1507. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1508. AC_SUBST(LOGFACILITY)
  1509. # Check if we have getresuid and getresgid
  1510. AC_CHECK_FUNCS(getresuid getresgid)
  1511. # Check for gethostbyname_r in all its glorious incompatible versions.
  1512. # (This logic is based on that in Python's configure.in)
  1513. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1514. [Define this if you have any gethostbyname_r()])
  1515. AC_CHECK_FUNC(gethostbyname_r, [
  1516. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1517. OLD_CFLAGS=$CFLAGS
  1518. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1519. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1520. #include <netdb.h>
  1521. ]], [[
  1522. char *cp1, *cp2;
  1523. struct hostent *h1, *h2;
  1524. int i1, i2;
  1525. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1526. ]])],[
  1527. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1528. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1529. [Define this if gethostbyname_r takes 6 arguments])
  1530. AC_MSG_RESULT(6)
  1531. ], [
  1532. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1533. #include <netdb.h>
  1534. ]], [[
  1535. char *cp1, *cp2;
  1536. struct hostent *h1;
  1537. int i1, i2;
  1538. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1539. ]])], [
  1540. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1541. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1542. [Define this if gethostbyname_r takes 5 arguments])
  1543. AC_MSG_RESULT(5)
  1544. ], [
  1545. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1546. #include <netdb.h>
  1547. ]], [[
  1548. char *cp1;
  1549. struct hostent *h1;
  1550. struct hostent_data hd;
  1551. (void) gethostbyname_r(cp1,h1,&hd);
  1552. ]])], [
  1553. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1554. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1555. [Define this if gethostbyname_r takes 3 arguments])
  1556. AC_MSG_RESULT(3)
  1557. ], [
  1558. AC_MSG_RESULT(0)
  1559. ])
  1560. ])
  1561. ])
  1562. CFLAGS=$OLD_CFLAGS
  1563. ])
  1564. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1565. tor_cv_have_func_macro,
  1566. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1567. #include <stdio.h>
  1568. int main(int c, char **v) { puts(__func__); }])],
  1569. tor_cv_have_func_macro=yes,
  1570. tor_cv_have_func_macro=no))
  1571. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1572. tor_cv_have_FUNC_macro,
  1573. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1574. #include <stdio.h>
  1575. int main(int c, char **v) { puts(__FUNC__); }])],
  1576. tor_cv_have_FUNC_macro=yes,
  1577. tor_cv_have_FUNC_macro=no))
  1578. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1579. tor_cv_have_FUNCTION_macro,
  1580. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1581. #include <stdio.h>
  1582. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1583. tor_cv_have_FUNCTION_macro=yes,
  1584. tor_cv_have_FUNCTION_macro=no))
  1585. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1586. tor_cv_have_environ_declared,
  1587. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1588. #ifdef HAVE_UNISTD_H
  1589. #include <unistd.h>
  1590. #endif
  1591. #include <stdlib.h>
  1592. int main(int c, char **v) { char **t = environ; }])],
  1593. tor_cv_have_environ_declared=yes,
  1594. tor_cv_have_environ_declared=no))
  1595. if test "$tor_cv_have_func_macro" = "yes"; then
  1596. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1597. fi
  1598. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1599. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1600. fi
  1601. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1602. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1603. [Defined if the compiler supports __FUNCTION__])
  1604. fi
  1605. if test "$tor_cv_have_environ_declared" = "yes"; then
  1606. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1607. [Defined if we have extern char **environ already declared])
  1608. fi
  1609. # $prefix stores the value of the --prefix command line option, or
  1610. # NONE if the option wasn't set. In the case that it wasn't set, make
  1611. # it be the default, so that we can use it to expand directories now.
  1612. if test "x$prefix" = "xNONE"; then
  1613. prefix=$ac_default_prefix
  1614. fi
  1615. # and similarly for $exec_prefix
  1616. if test "x$exec_prefix" = "xNONE"; then
  1617. exec_prefix=$prefix
  1618. fi
  1619. if test "x$BUILDDIR" = "x"; then
  1620. BUILDDIR=`pwd`
  1621. fi
  1622. AC_SUBST(BUILDDIR)
  1623. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1624. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1625. if test "x$CONFDIR" = "x"; then
  1626. CONFDIR=`eval echo $sysconfdir/tor`
  1627. fi
  1628. AC_SUBST(CONFDIR)
  1629. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1630. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1631. BINDIR=`eval echo $bindir`
  1632. AC_SUBST(BINDIR)
  1633. LOCALSTATEDIR=`eval echo $localstatedir`
  1634. AC_SUBST(LOCALSTATEDIR)
  1635. if test "$bwin32" = "true"; then
  1636. # Test if the linker supports the --nxcompat and --dynamicbase options
  1637. # for Windows
  1638. save_LDFLAGS="$LDFLAGS"
  1639. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1640. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1641. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1642. [AC_MSG_RESULT([yes])]
  1643. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1644. [AC_MSG_RESULT([no])]
  1645. )
  1646. LDFLAGS="$save_LDFLAGS"
  1647. fi
  1648. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1649. # than autoconf's macros like.
  1650. if test "$GCC" = "yes"; then
  1651. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1652. # accident waiting to happen.
  1653. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1654. else
  1655. # Override optimization level for non-gcc compilers
  1656. CFLAGS="$CFLAGS -O"
  1657. enable_gcc_warnings=no
  1658. enable_gcc_warnings_advisory=no
  1659. fi
  1660. # Warnings implies advisory-warnings and -Werror.
  1661. if test "$enable_gcc_warnings" = "yes"; then
  1662. enable_gcc_warnings_advisory=yes
  1663. enable_fatal_warnings=yes
  1664. fi
  1665. # OS X Lion started deprecating the system openssl. Let's just disable
  1666. # all deprecation warnings on OS X. Also, to potentially make the binary
  1667. # a little smaller, let's enable dead_strip.
  1668. case "$host_os" in
  1669. darwin*)
  1670. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1671. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1672. esac
  1673. # Add some more warnings which we use in development but not in the
  1674. # released versions. (Some relevant gcc versions can't handle these.)
  1675. #
  1676. # Note that we have to do this near the end of the autoconf process, or
  1677. # else we may run into problems when these warnings hit on the testing C
  1678. # programs that autoconf wants to build.
  1679. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1680. case "$host" in
  1681. *-*-openbsd* | *-*-bitrig*)
  1682. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1683. # That's fine, except that the headers don't pass -Wredundant-decls.
  1684. # Therefore, let's disable -Wsystem-headers when we're building
  1685. # with maximal warnings on OpenBSD.
  1686. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1687. esac
  1688. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1689. # have it work better.
  1690. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1691. # This warning was added in gcc 4.3, but it appears to generate
  1692. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1693. #CFLAGS="$CFLAGS -Wlogical-op"
  1694. m4_foreach_w([warning_flag], [
  1695. -Waddress
  1696. -Waddress-of-array-temporary
  1697. -Waddress-of-temporary
  1698. -Wambiguous-macro
  1699. -Wanonymous-pack-parens
  1700. -Warc
  1701. -Warc-abi
  1702. -Warc-bridge-casts-disallowed-in-nonarc
  1703. -Warc-maybe-repeated-use-of-weak
  1704. -Warc-performSelector-leaks
  1705. -Warc-repeated-use-of-weak
  1706. -Warray-bounds
  1707. -Warray-bounds-pointer-arithmetic
  1708. -Wasm
  1709. -Wasm-operand-widths
  1710. -Watomic-properties
  1711. -Watomic-property-with-user-defined-accessor
  1712. -Wauto-import
  1713. -Wauto-storage-class
  1714. -Wauto-var-id
  1715. -Wavailability
  1716. -Wbackslash-newline-escape
  1717. -Wbad-array-new-length
  1718. -Wbind-to-temporary-copy
  1719. -Wbitfield-constant-conversion
  1720. -Wbool-conversion
  1721. -Wbool-conversions
  1722. -Wbuiltin-requires-header
  1723. -Wchar-align
  1724. -Wcompare-distinct-pointer-types
  1725. -Wcomplex-component-init
  1726. -Wconditional-type-mismatch
  1727. -Wconfig-macros
  1728. -Wconstant-conversion
  1729. -Wconstant-logical-operand
  1730. -Wconstexpr-not-const
  1731. -Wcustom-atomic-properties
  1732. -Wdangling-field
  1733. -Wdangling-initializer-list
  1734. -Wdate-time
  1735. -Wdelegating-ctor-cycles
  1736. -Wdeprecated-implementations
  1737. -Wdeprecated-register
  1738. -Wdirect-ivar-access
  1739. -Wdiscard-qual
  1740. -Wdistributed-object-modifiers
  1741. -Wdivision-by-zero
  1742. -Wdollar-in-identifier-extension
  1743. -Wdouble-promotion
  1744. -Wduplicate-decl-specifier
  1745. -Wduplicate-enum
  1746. -Wduplicate-method-arg
  1747. -Wduplicate-method-match
  1748. -Wduplicated-cond
  1749. -Wdynamic-class-memaccess
  1750. -Wembedded-directive
  1751. -Wempty-translation-unit
  1752. -Wenum-conversion
  1753. -Wexit-time-destructors
  1754. -Wexplicit-ownership-type
  1755. -Wextern-initializer
  1756. -Wextra
  1757. -Wextra-semi
  1758. -Wextra-tokens
  1759. -Wflexible-array-extensions
  1760. -Wfloat-conversion
  1761. -Wformat-non-iso
  1762. -Wfour-char-constants
  1763. -Wgcc-compat
  1764. -Wglobal-constructors
  1765. -Wgnu-array-member-paren-init
  1766. -Wgnu-designator
  1767. -Wgnu-static-float-init
  1768. -Wheader-guard
  1769. -Wheader-hygiene
  1770. -Widiomatic-parentheses
  1771. -Wignored-attributes
  1772. -Wimplicit-atomic-properties
  1773. -Wimplicit-conversion-floating-point-to-bool
  1774. -Wimplicit-exception-spec-mismatch
  1775. -Wimplicit-fallthrough
  1776. -Wimplicit-fallthrough-per-function
  1777. -Wimplicit-retain-self
  1778. -Wimport-preprocessor-directive-pedantic
  1779. -Wincompatible-library-redeclaration
  1780. -Wincompatible-pointer-types-discards-qualifiers
  1781. -Wincomplete-implementation
  1782. -Wincomplete-module
  1783. -Wincomplete-umbrella
  1784. -Winit-self
  1785. -Wint-conversions
  1786. -Wint-to-void-pointer-cast
  1787. -Winteger-overflow
  1788. -Winvalid-constexpr
  1789. -Winvalid-iboutlet
  1790. -Winvalid-noreturn
  1791. -Winvalid-pp-token
  1792. -Winvalid-source-encoding
  1793. -Winvalid-token-paste
  1794. -Wknr-promoted-parameter
  1795. -Wlarge-by-value-copy
  1796. -Wliteral-conversion
  1797. -Wliteral-range
  1798. -Wlocal-type-template-args
  1799. -Wlogical-op
  1800. -Wloop-analysis
  1801. -Wmain-return-type
  1802. -Wmalformed-warning-check
  1803. -Wmethod-signatures
  1804. -Wmicrosoft
  1805. -Wmicrosoft-exists
  1806. -Wmismatched-parameter-types
  1807. -Wmismatched-return-types
  1808. -Wmissing-field-initializers
  1809. -Wmissing-format-attribute
  1810. -Wmissing-noreturn
  1811. -Wmissing-selector-name
  1812. -Wmissing-sysroot
  1813. -Wmissing-variable-declarations
  1814. -Wmodule-conflict
  1815. -Wnested-anon-types
  1816. -Wnewline-eof
  1817. -Wnon-literal-null-conversion
  1818. -Wnon-pod-varargs
  1819. -Wnonportable-cfstrings
  1820. -Wnormalized=nfkc
  1821. -Wnull-arithmetic
  1822. -Wnull-character
  1823. -Wnull-conversion
  1824. -Wnull-dereference
  1825. -Wout-of-line-declaration
  1826. -Wover-aligned
  1827. -Woverlength-strings
  1828. -Woverride-init
  1829. -Woverriding-method-mismatch
  1830. -Wpointer-type-mismatch
  1831. -Wpredefined-identifier-outside-function
  1832. -Wprotocol-property-synthesis-ambiguity
  1833. -Wreadonly-iboutlet-property
  1834. -Wreadonly-setter-attrs
  1835. -Wreceiver-expr
  1836. -Wreceiver-forward-class
  1837. -Wreceiver-is-weak
  1838. -Wreinterpret-base-class
  1839. -Wrequires-super-attribute
  1840. -Wreserved-user-defined-literal
  1841. -Wreturn-stack-address
  1842. -Wsection
  1843. -Wselector-type-mismatch
  1844. -Wsentinel
  1845. -Wserialized-diagnostics
  1846. -Wshadow
  1847. -Wshift-count-negative
  1848. -Wshift-count-overflow
  1849. -Wshift-negative-value
  1850. -Wshift-overflow=2
  1851. -Wshift-sign-overflow
  1852. -Wshorten-64-to-32
  1853. -Wsizeof-array-argument
  1854. -Wsource-uses-openmp
  1855. -Wstatic-float-init
  1856. -Wstatic-in-inline
  1857. -Wstatic-local-in-inline
  1858. -Wstrict-overflow=1
  1859. -Wstring-compare
  1860. -Wstring-conversion
  1861. -Wstrlcpy-strlcat-size
  1862. -Wstrncat-size
  1863. -Wsuggest-attribute=format
  1864. -Wsuggest-attribute=noreturn
  1865. -Wsuper-class-method-mismatch
  1866. -Wswitch-bool
  1867. -Wsync-nand
  1868. -Wtautological-constant-out-of-range-compare
  1869. -Wtentative-definition-incomplete-type
  1870. -Wtrampolines
  1871. -Wtype-safety
  1872. -Wtypedef-redefinition
  1873. -Wtypename-missing
  1874. -Wundefined-inline
  1875. -Wundefined-internal
  1876. -Wundefined-reinterpret-cast
  1877. -Wunicode
  1878. -Wunicode-whitespace
  1879. -Wunknown-warning-option
  1880. -Wunnamed-type-template-args
  1881. -Wunneeded-member-function
  1882. -Wunsequenced
  1883. -Wunsupported-visibility
  1884. -Wunused-but-set-parameter
  1885. -Wunused-but-set-variable
  1886. -Wunused-command-line-argument
  1887. -Wunused-const-variable=2
  1888. -Wunused-exception-parameter
  1889. -Wunused-local-typedefs
  1890. -Wunused-member-function
  1891. -Wunused-sanitize-argument
  1892. -Wunused-volatile-lvalue
  1893. -Wuser-defined-literals
  1894. -Wvariadic-macros
  1895. -Wvector-conversion
  1896. -Wvector-conversions
  1897. -Wvexing-parse
  1898. -Wvisibility
  1899. -Wvla-extension
  1900. -Wzero-length-array
  1901. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1902. dnl We should re-enable this in some later version. Clang doesn't
  1903. dnl mind, but it causes trouble with GCC.
  1904. dnl -Wstrict-overflow=2
  1905. dnl These seem to require annotations that we don't currently use,
  1906. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1907. dnl -Wthread-safety
  1908. dnl -Wthread-safety-analysis
  1909. dnl -Wthread-safety-attributes
  1910. dnl -Wthread-safety-beta
  1911. dnl -Wthread-safety-precise
  1912. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1913. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1914. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1915. CFLAGS="$CFLAGS -Wwrite-strings"
  1916. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1917. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1918. CFLAGS="$CFLAGS -Wunused-parameter "
  1919. # These interfere with building main() { return 0; }, which autoconf
  1920. # likes to use as its default program.
  1921. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1922. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1923. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1924. fi
  1925. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1926. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1927. fi
  1928. if test "x$enable_fatal_warnings" = "xyes"; then
  1929. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1930. # default autoconf programs are full of errors.
  1931. CFLAGS="$CFLAGS -Werror"
  1932. fi
  1933. fi
  1934. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1935. case "$host_os" in
  1936. darwin*)
  1937. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1938. esac
  1939. fi
  1940. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1941. AC_CONFIG_FILES([
  1942. Doxyfile
  1943. Makefile
  1944. contrib/dist/suse/tor.sh
  1945. contrib/operator-tools/tor.logrotate
  1946. contrib/dist/tor.sh
  1947. contrib/dist/torctl
  1948. contrib/dist/tor.service
  1949. src/config/torrc.sample
  1950. src/config/torrc.minimal
  1951. src/rust/.cargo/config
  1952. scripts/maint/checkOptionDocs.pl
  1953. scripts/maint/updateVersions.pl
  1954. ])
  1955. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1956. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1957. for file in $regular_mans ; do
  1958. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1959. echo "==================================";
  1960. echo;
  1961. echo "Building Tor has failed since manpages cannot be built.";
  1962. echo;
  1963. echo "You need asciidoc installed to be able to build the manpages.";
  1964. echo "To build without manpages, use the --disable-asciidoc argument";
  1965. echo "when calling configure.";
  1966. echo;
  1967. echo "==================================";
  1968. exit 1;
  1969. fi
  1970. done
  1971. fi
  1972. if test "$fragile_hardening" = "yes"; then
  1973. AC_MSG_WARN([
  1974. ============
  1975. Warning! Building Tor with --enable-fragile-hardening (also known as
  1976. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  1977. other kinds of attacks easier. A Tor instance build with this option will be
  1978. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  1979. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  1980. denial of service attacks. For more information, see
  1981. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  1982. ============
  1983. ])
  1984. fi
  1985. AC_OUTPUT