configure.ac 71 KB

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  1. dnl Copyright (c) 2001-2004, Roger Dingledine
  2. dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
  3. dnl Copyright (c) 2007-2017, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_PREREQ([2.63])
  6. AC_INIT([tor],[0.3.4.0-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_USE_SYSTEM_EXTENSIONS
  16. AC_CANONICAL_HOST
  17. PKG_PROG_PKG_CONFIG
  18. if test -f "/etc/redhat-release"; then
  19. if test -f "/usr/kerberos/include"; then
  20. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  21. fi
  22. fi
  23. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  24. # the += operator on it in src/or/Makefile.am
  25. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  28. AC_ARG_ENABLE(static-openssl,
  29. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  30. AC_ARG_ENABLE(static-libevent,
  31. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  32. AC_ARG_ENABLE(static-zlib,
  33. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  34. AC_ARG_ENABLE(static-tor,
  35. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  36. AC_ARG_ENABLE(unittests,
  37. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  38. AC_ARG_ENABLE(coverage,
  39. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  40. AC_ARG_ENABLE(asserts-in-tests,
  41. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  42. AC_ARG_ENABLE(system-torrc,
  43. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  44. AC_ARG_ENABLE(libfuzzer,
  45. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  46. AC_ARG_ENABLE(oss-fuzz,
  47. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  48. AC_ARG_ENABLE(memory-sentinels,
  49. AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
  50. AC_ARG_ENABLE(rust,
  51. AS_HELP_STRING(--enable-rust, [enable rust integration]))
  52. AC_ARG_ENABLE(cargo-online-mode,
  53. AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
  54. AC_ARG_ENABLE(restart-debugging,
  55. AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
  56. AC_ARG_ENABLE(zstd-advanced-apis,
  57. AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
  58. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  59. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  60. fi
  61. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  62. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  63. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  64. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  65. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  66. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  67. if test "$enable_static_tor" = "yes"; then
  68. enable_static_libevent="yes";
  69. enable_static_openssl="yes";
  70. enable_static_zlib="yes";
  71. CFLAGS="$CFLAGS -static"
  72. fi
  73. if test "$enable_system_torrc" = "no"; then
  74. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  75. [Defined if we're not going to look for a torrc in SYSCONF])
  76. fi
  77. if test "$enable_memory_sentinels" = "no"; then
  78. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  79. [Defined if we're turning off memory safety code to look for bugs])
  80. fi
  81. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  82. AC_ARG_ENABLE(asciidoc,
  83. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  84. [case "${enableval}" in
  85. "yes") asciidoc=true ;;
  86. "no") asciidoc=false ;;
  87. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  88. esac], [asciidoc=true])
  89. # systemd notify support
  90. AC_ARG_ENABLE(systemd,
  91. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  92. [case "${enableval}" in
  93. "yes") systemd=true ;;
  94. "no") systemd=false ;;
  95. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  96. esac], [systemd=auto])
  97. if test "$enable_restart_debugging" = "yes"; then
  98. AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
  99. [Defined if we're building with support for in-process restart debugging.])
  100. fi
  101. if test "$enable_zstd_advanced_apis" != "no"; then
  102. AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
  103. [Defined if we're going to try to use zstd's "static-only" APIs.])
  104. fi
  105. # systemd support
  106. if test "x$enable_systemd" = "xno"; then
  107. have_systemd=no;
  108. else
  109. PKG_CHECK_MODULES(SYSTEMD,
  110. [libsystemd-daemon],
  111. have_systemd=yes,
  112. have_systemd=no)
  113. if test "x$have_systemd" = "xno"; then
  114. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  115. PKG_CHECK_MODULES(SYSTEMD,
  116. [libsystemd],
  117. have_systemd=yes,
  118. have_systemd=no)
  119. fi
  120. fi
  121. if test "x$have_systemd" = "xyes"; then
  122. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  123. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  124. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  125. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  126. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  127. fi
  128. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  129. AC_SUBST(TOR_SYSTEMD_LIBS)
  130. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  131. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  132. fi
  133. case "$host" in
  134. *-*-solaris* )
  135. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  136. ;;
  137. esac
  138. AC_ARG_ENABLE(gcc-warnings,
  139. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  140. AC_ARG_ENABLE(fatal-warnings,
  141. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  142. AC_ARG_ENABLE(gcc-warnings-advisory,
  143. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  144. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  145. AC_ARG_ENABLE(gcc-hardening,
  146. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  147. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  148. AC_ARG_ENABLE(expensive-hardening,
  149. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  150. AC_ARG_ENABLE(fragile-hardening,
  151. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  152. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  153. fragile_hardening="yes"
  154. fi
  155. dnl Linker hardening options
  156. dnl Currently these options are ELF specific - you can't use this with MacOSX
  157. AC_ARG_ENABLE(linker-hardening,
  158. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  159. AC_ARG_ENABLE(local-appdata,
  160. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  161. if test "$enable_local_appdata" = "yes"; then
  162. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  163. [Defined if we default to host local appdata paths on Windows])
  164. fi
  165. # Tor2web mode flag
  166. AC_ARG_ENABLE(tor2web-mode,
  167. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  168. [if test "x$enableval" = "xyes"; then
  169. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  170. fi])
  171. AC_ARG_ENABLE(tool-name-check,
  172. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  173. AC_ARG_ENABLE(seccomp,
  174. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  175. AC_ARG_ENABLE(libscrypt,
  176. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  177. dnl Enable event tracing which are transformed to debug log statement.
  178. AC_ARG_ENABLE(event-tracing-debug,
  179. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  180. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  181. if test x$enable_event_tracing_debug = xyes; then
  182. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  183. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  184. fi
  185. dnl Enable Android only features.
  186. AC_ARG_ENABLE(android,
  187. AS_HELP_STRING(--enable-android, [build with Android features enabled]))
  188. AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
  189. if test "x$enable_android" = "xyes"; then
  190. AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
  191. dnl Check if the Android log library is available.
  192. AC_CHECK_HEADERS([android/log.h])
  193. AC_SEARCH_LIBS(__android_log_write, [log])
  194. fi
  195. dnl check for the correct "ar" when cross-compiling.
  196. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  197. dnl so kludge up a replacement for the case where it isn't there yet.)
  198. m4_ifdef([AM_PROG_AR],
  199. [AM_PROG_AR],
  200. [AN_MAKEVAR([AR], [AC_PROG_AR])
  201. AN_PROGRAM([ar], [AC_PROG_AR])
  202. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  203. AC_PROG_AR])
  204. dnl Check whether the above macro has settled for a simply named tool even
  205. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  206. dnl because that will find any cc on the system, not only the cross-compiler,
  207. dnl and then verify that a binary built with this compiler runs on the
  208. dnl build system. It will then come to the false conclusion that we're not
  209. dnl cross-compiling.
  210. if test "x$enable_tool_name_check" != "xno"; then
  211. if test "x$ac_tool_warned" = "xyes"; then
  212. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  213. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  214. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  215. fi
  216. fi
  217. AC_PROG_CC
  218. AC_PROG_CPP
  219. AC_PROG_MAKE_SET
  220. AC_PROG_RANLIB
  221. AC_PROG_SED
  222. AC_ARG_VAR([PERL], [path to Perl binary])
  223. AC_CHECK_PROGS([PERL], [perl])
  224. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  225. dnl check for asciidoc and a2x
  226. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  227. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  228. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  229. AM_PROG_CC_C_O
  230. AC_PROG_CC_C99
  231. AC_ARG_VAR([PYTHON], [path to Python binary])
  232. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  233. if test "x$PYTHON" = "x"; then
  234. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  235. fi
  236. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  237. dnl List all external rust crates we depend on here. Include the version
  238. rust_crates="libc-0.2.22"
  239. AC_SUBST(rust_crates)
  240. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  241. AC_C_FLEXIBLE_ARRAY_MEMBER
  242. ], [
  243. dnl Maybe we've got an old autoconf...
  244. AC_CACHE_CHECK([for flexible array members],
  245. tor_cv_c_flexarray,
  246. [AC_COMPILE_IFELSE(
  247. AC_LANG_PROGRAM([
  248. struct abc { int a; char b[]; };
  249. ], [
  250. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  251. def->b[0] = 33;
  252. ]),
  253. [tor_cv_c_flexarray=yes],
  254. [tor_cv_c_flexarray=no])])
  255. if test "$tor_cv_flexarray" = "yes"; then
  256. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  257. else
  258. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  259. fi
  260. ])
  261. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  262. tor_cv_c_c99_decl,
  263. [AC_COMPILE_IFELSE(
  264. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  265. [tor_cv_c_c99_decl=yes],
  266. [tor_cv_c_c99_decl=no] )])
  267. if test "$tor_cv_c_c99_decl" != "yes"; then
  268. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  269. fi
  270. AC_CACHE_CHECK([for working C99 designated initializers],
  271. tor_cv_c_c99_designated_init,
  272. [AC_COMPILE_IFELSE(
  273. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  274. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  275. [tor_cv_c_c99_designated_init=yes],
  276. [tor_cv_c_c99_designated_init=no] )])
  277. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  278. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  279. fi
  280. TORUSER=_tor
  281. AC_ARG_WITH(tor-user,
  282. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  283. [
  284. TORUSER=$withval
  285. ]
  286. )
  287. AC_SUBST(TORUSER)
  288. TORGROUP=_tor
  289. AC_ARG_WITH(tor-group,
  290. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  291. [
  292. TORGROUP=$withval
  293. ]
  294. )
  295. AC_SUBST(TORGROUP)
  296. dnl If _WIN32 is defined and non-zero, we are building for win32
  297. AC_MSG_CHECKING([for win32])
  298. AC_RUN_IFELSE([AC_LANG_SOURCE([
  299. int main(int c, char **v) {
  300. #ifdef _WIN32
  301. #if _WIN32
  302. return 0;
  303. #else
  304. return 1;
  305. #endif
  306. #else
  307. return 2;
  308. #endif
  309. }])],
  310. bwin32=true; AC_MSG_RESULT([yes]),
  311. bwin32=false; AC_MSG_RESULT([no]),
  312. bwin32=cross; AC_MSG_RESULT([cross])
  313. )
  314. if test "$bwin32" = "cross"; then
  315. AC_MSG_CHECKING([for win32 (cross)])
  316. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  317. #ifdef _WIN32
  318. int main(int c, char **v) {return 0;}
  319. #else
  320. #error
  321. int main(int c, char **v) {return x(y);}
  322. #endif
  323. ])],
  324. bwin32=true; AC_MSG_RESULT([yes]),
  325. bwin32=false; AC_MSG_RESULT([no]))
  326. fi
  327. AH_BOTTOM([
  328. #ifdef _WIN32
  329. /* Defined to access windows functions and definitions for >=WinXP */
  330. # ifndef WINVER
  331. # define WINVER 0x0501
  332. # endif
  333. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  334. # ifndef _WIN32_WINNT
  335. # define _WIN32_WINNT 0x0501
  336. # endif
  337. /* Defined to avoid including some windows headers as part of Windows.h */
  338. # ifndef WIN32_LEAN_AND_MEAN
  339. # define WIN32_LEAN_AND_MEAN 1
  340. # endif
  341. #endif
  342. ])
  343. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  344. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  345. dnl Enable C99 when compiling with MIPSpro
  346. AC_MSG_CHECKING([for MIPSpro compiler])
  347. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  348. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  349. #error
  350. return x(y);
  351. #endif
  352. ])],
  353. bmipspro=false; AC_MSG_RESULT(no),
  354. bmipspro=true; AC_MSG_RESULT(yes))
  355. if test "$bmipspro" = "true"; then
  356. CFLAGS="$CFLAGS -c99"
  357. fi
  358. AC_C_BIGENDIAN
  359. if test "x$enable_rust" = "xyes"; then
  360. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  361. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  362. if test "x$RUSTC" = "xno"; then
  363. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  364. fi
  365. AC_ARG_VAR([CARGO], [path to the cargo binary])
  366. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  367. if test "x$CARGO" = "xno"; then
  368. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  369. fi
  370. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  371. if test "x$enable_cargo_online_mode" = "xyes"; then
  372. CARGO_ONLINE=
  373. RUST_DL=#
  374. else
  375. CARGO_ONLINE=--frozen
  376. RUST_DL=
  377. dnl When we're not allowed to touch the network, we need crate dependencies
  378. dnl locally available.
  379. AC_MSG_CHECKING([rust crate dependencies])
  380. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  381. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  382. TOR_RUST_DEPENDENCIES="$srcdir/src/ext/rust/"
  383. NEED_MOD=1
  384. fi
  385. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  386. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  387. ERRORED=1
  388. fi
  389. for dep in $rust_crates; do
  390. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  391. 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.])
  392. ERRORED=1
  393. fi
  394. done
  395. if test "x$NEED_MOD" = "x1"; then
  396. dnl When looking for dependencies from cargo, pick right directory
  397. TOR_RUST_DEPENDENCIES="../../src/ext/rust"
  398. fi
  399. if test "x$ERRORED" = "x"; then
  400. AC_MSG_RESULT([yes])
  401. fi
  402. fi
  403. dnl This is a workaround for #46797
  404. dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ). Once the
  405. dnl upstream bug is fixed, we can remove this workaround.
  406. case "$host_os" in
  407. darwin*)
  408. TOR_RUST_EXTRA_LIBS="-lresolv"
  409. ;;
  410. esac
  411. dnl For now both MSVC and MinGW rust libraries will output static libs with
  412. dnl the MSVC naming convention.
  413. if test "$bwin32" = "true"; then
  414. TOR_RUST_STATIC_NAME=tor_rust.lib
  415. else
  416. TOR_RUST_STATIC_NAME=libtor_rust.a
  417. fi
  418. AC_SUBST(TOR_RUST_STATIC_NAME)
  419. AC_SUBST(CARGO_ONLINE)
  420. AC_SUBST(RUST_DL)
  421. dnl Let's check the rustc version, too
  422. AC_MSG_CHECKING([rust version])
  423. RUSTC_VERSION=`$RUSTC --version`
  424. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  425. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  426. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  427. AC_MSG_ERROR([rustc version couldn't be identified])
  428. fi
  429. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  430. AC_MSG_ERROR([rustc must be at least version 1.14])
  431. fi
  432. AC_MSG_RESULT([$RUSTC_VERSION])
  433. fi
  434. AC_SUBST(TOR_RUST_EXTRA_LIBS)
  435. AC_SEARCH_LIBS(socket, [socket network])
  436. AC_SEARCH_LIBS(gethostbyname, [nsl])
  437. AC_SEARCH_LIBS(dlopen, [dl])
  438. AC_SEARCH_LIBS(inet_aton, [resolv])
  439. AC_SEARCH_LIBS(backtrace, [execinfo])
  440. saved_LIBS="$LIBS"
  441. AC_SEARCH_LIBS([clock_gettime], [rt])
  442. if test "$LIBS" != "$saved_LIBS"; then
  443. # Looks like we need -lrt for clock_gettime().
  444. have_rt=yes
  445. fi
  446. AC_SEARCH_LIBS(pthread_create, [pthread])
  447. AC_SEARCH_LIBS(pthread_detach, [pthread])
  448. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  449. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  450. AC_CHECK_FUNCS(
  451. _NSGetEnviron \
  452. RtlSecureZeroMemory \
  453. SecureZeroMemory \
  454. accept4 \
  455. backtrace \
  456. backtrace_symbols_fd \
  457. eventfd \
  458. explicit_bzero \
  459. timingsafe_memcmp \
  460. flock \
  461. ftime \
  462. get_current_dir_name \
  463. getaddrinfo \
  464. getifaddrs \
  465. getpass \
  466. getrlimit \
  467. gettimeofday \
  468. gmtime_r \
  469. gnu_get_libc_version \
  470. htonll \
  471. inet_aton \
  472. ioctl \
  473. issetugid \
  474. llround \
  475. localtime_r \
  476. lround \
  477. mach_approximate_time \
  478. memmem \
  479. memset_s \
  480. pipe \
  481. pipe2 \
  482. prctl \
  483. readpassphrase \
  484. rint \
  485. sigaction \
  486. socketpair \
  487. statvfs \
  488. strlcat \
  489. strlcpy \
  490. strnlen \
  491. strptime \
  492. strtok_r \
  493. strtoull \
  494. sysconf \
  495. sysctl \
  496. truncate \
  497. uname \
  498. usleep \
  499. vasprintf \
  500. _vscprintf
  501. )
  502. # Apple messed up when they added two functions functions in Sierra: they
  503. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  504. # checks. So we should only probe for those functions if we are sure that we
  505. # are not targeting OSX 10.11 or earlier.
  506. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  507. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  508. #ifdef __APPLE__
  509. # include <AvailabilityMacros.h>
  510. # ifndef MAC_OS_X_VERSION_10_12
  511. # define MAC_OS_X_VERSION_10_12 101200
  512. # endif
  513. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  514. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  515. # error "Running on Mac OSX 10.11 or earlier"
  516. # endif
  517. # endif
  518. #endif
  519. ]], [[]])],
  520. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  521. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  522. if test "$on_macos_pre_10_12" = "no"; then
  523. AC_CHECK_FUNCS(
  524. clock_gettime \
  525. getentropy \
  526. )
  527. fi
  528. if test "$bwin32" != "true"; then
  529. AC_CHECK_HEADERS(pthread.h)
  530. AC_CHECK_FUNCS(pthread_create)
  531. AC_CHECK_FUNCS(pthread_condattr_setclock)
  532. fi
  533. if test "$bwin32" = "true"; then
  534. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  535. #include <windows.h>
  536. #include <conio.h>
  537. #include <wchar.h>
  538. ])
  539. fi
  540. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  541. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  542. AC_MSG_CHECKING([whether free(NULL) works])
  543. AC_RUN_IFELSE([AC_LANG_PROGRAM([
  544. #include <stdlib.h>
  545. ], [
  546. char *p = NULL;
  547. free(p);
  548. ])],
  549. [free_null_ok=true; AC_MSG_RESULT(yes)],
  550. [free_null_ok=false; AC_MSG_RESULT(no)],
  551. [free_null_ok=cross; AC_MSG_RESULT(cross)])
  552. if test "$free_null_ok" = "false"; then
  553. AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
  554. fi
  555. dnl ------------------------------------------------------
  556. dnl Where do you live, libevent? And how do we call you?
  557. if test "$bwin32" = "true"; then
  558. TOR_LIB_WS32=-lws2_32
  559. TOR_LIB_IPHLPAPI=-liphlpapi
  560. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  561. # think it's actually necessary.
  562. TOR_LIB_GDI=-lgdi32
  563. TOR_LIB_USERENV=-luserenv
  564. else
  565. TOR_LIB_WS32=
  566. TOR_LIB_GDI=
  567. TOR_LIB_USERENV=
  568. fi
  569. AC_SUBST(TOR_LIB_WS32)
  570. AC_SUBST(TOR_LIB_GDI)
  571. AC_SUBST(TOR_LIB_IPHLPAPI)
  572. AC_SUBST(TOR_LIB_USERENV)
  573. tor_libevent_pkg_redhat="libevent"
  574. tor_libevent_pkg_debian="libevent-dev"
  575. tor_libevent_devpkg_redhat="libevent-devel"
  576. tor_libevent_devpkg_debian="libevent-dev"
  577. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  578. dnl linking for static builds.
  579. STATIC_LIBEVENT_FLAGS=""
  580. if test "$enable_static_libevent" = "yes"; then
  581. if test "$have_rt" = "yes"; then
  582. STATIC_LIBEVENT_FLAGS=" -lrt "
  583. fi
  584. fi
  585. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  586. #ifdef _WIN32
  587. #include <winsock2.h>
  588. #endif
  589. #include <sys/time.h>
  590. #include <sys/types.h>
  591. #include <event2/event.h>], [
  592. #ifdef _WIN32
  593. #include <winsock2.h>
  594. #endif
  595. struct event_base;
  596. struct event_base *event_base_new(void);],
  597. [
  598. #ifdef _WIN32
  599. {WSADATA d; WSAStartup(0x101,&d); }
  600. #endif
  601. event_base_free(event_base_new());
  602. ], [--with-libevent-dir], [/opt/libevent])
  603. dnl Determine the incantation needed to link libevent.
  604. save_LIBS="$LIBS"
  605. save_LDFLAGS="$LDFLAGS"
  606. save_CPPFLAGS="$CPPFLAGS"
  607. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  608. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  609. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  610. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  611. if test "$enable_static_libevent" = "yes"; then
  612. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  613. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  614. else
  615. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  616. fi
  617. else
  618. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  619. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  620. 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"))
  621. if test "$ac_cv_search_event_new" != "none required"; then
  622. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  623. fi
  624. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  625. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  626. fi
  627. else
  628. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  629. fi
  630. fi
  631. dnl Now check for particular libevent functions.
  632. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  633. evutil_secure_rng_add_bytes \
  634. ])
  635. LIBS="$save_LIBS"
  636. LDFLAGS="$save_LDFLAGS"
  637. CPPFLAGS="$save_CPPFLAGS"
  638. dnl Check that libevent is at least at version 2.0.10, the first stable
  639. dnl release of its series
  640. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  641. AC_MSG_CHECKING([whether Libevent is new enough])
  642. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  643. #include <event2/event.h>
  644. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  645. #error
  646. int x = y(zz);
  647. #else
  648. int x = 1;
  649. #endif
  650. ])], [ AC_MSG_RESULT([yes]) ],
  651. [ AC_MSG_RESULT([no])
  652. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  653. LIBS="$save_LIBS"
  654. LDFLAGS="$save_LDFLAGS"
  655. CPPFLAGS="$save_CPPFLAGS"
  656. AC_SUBST(TOR_LIBEVENT_LIBS)
  657. dnl ------------------------------------------------------
  658. dnl Where do you live, libm?
  659. dnl On some platforms (Haiku/BeOS) the math library is
  660. dnl part of libroot. In which case don't link against lm
  661. TOR_LIB_MATH=""
  662. save_LIBS="$LIBS"
  663. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  664. if test "$ac_cv_search_pow" != "none required"; then
  665. TOR_LIB_MATH="$ac_cv_search_pow"
  666. fi
  667. LIBS="$save_LIBS"
  668. AC_SUBST(TOR_LIB_MATH)
  669. dnl ------------------------------------------------------
  670. dnl Where do you live, openssl? And how do we call you?
  671. tor_openssl_pkg_redhat="openssl"
  672. tor_openssl_pkg_debian="libssl-dev"
  673. tor_openssl_devpkg_redhat="openssl-devel"
  674. tor_openssl_devpkg_debian="libssl-dev"
  675. ALT_openssl_WITHVAL=""
  676. AC_ARG_WITH(ssl-dir,
  677. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  678. [
  679. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  680. ALT_openssl_WITHVAL="$withval"
  681. fi
  682. ])
  683. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  684. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  685. [#include <openssl/ssl.h>],
  686. [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
  687. [TLSv1_1_method();], [],
  688. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  689. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  690. if test "$enable_static_openssl" = "yes"; then
  691. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  692. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  693. else
  694. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  695. fi
  696. else
  697. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  698. fi
  699. AC_SUBST(TOR_OPENSSL_LIBS)
  700. dnl Now check for particular openssl functions.
  701. save_LIBS="$LIBS"
  702. save_LDFLAGS="$LDFLAGS"
  703. save_CPPFLAGS="$CPPFLAGS"
  704. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  705. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  706. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  707. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  708. #include <openssl/opensslv.h>
  709. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  710. #error "too old"
  711. #endif
  712. ]], [[]])],
  713. [ : ],
  714. [ 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.]) ])
  715. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  716. #include <openssl/opensslv.h>
  717. #include <openssl/evp.h>
  718. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  719. #error "no ECC"
  720. #endif
  721. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  722. #error "curves unavailable"
  723. #endif
  724. ]], [[]])],
  725. [ : ],
  726. [ 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.]) ])
  727. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  728. [#include <openssl/ssl.h>
  729. ])
  730. AC_CHECK_FUNCS([ \
  731. SSL_SESSION_get_master_key \
  732. SSL_get_server_random \
  733. SSL_get_client_ciphers \
  734. SSL_get_client_random \
  735. SSL_CIPHER_find \
  736. TLS_method
  737. ])
  738. dnl Check if OpenSSL has scrypt implementation.
  739. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  740. dnl Check if OpenSSL structures are opaque
  741. AC_CHECK_MEMBERS([SSL.state], , ,
  742. [#include <openssl/ssl.h>
  743. ])
  744. AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
  745. #include <openssl/sha.h>
  746. ])
  747. dnl Define the set of checks for KIST scheduler support.
  748. AC_DEFUN([CHECK_KIST_SUPPORT],[
  749. dnl KIST needs struct tcp_info and for certain members to exist.
  750. AC_CHECK_MEMBERS(
  751. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  752. , ,[[#include <netinet/tcp.h>]])
  753. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  754. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  755. #include <linux/sockios.h>
  756. #ifndef SIOCOUTQNSD
  757. #error
  758. #endif
  759. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  760. if test "x$have_siocoutqnsd" = "xyes"; then
  761. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  762. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  763. have_kist_support=yes
  764. fi
  765. fi
  766. fi
  767. ])
  768. dnl Now, trigger the check.
  769. CHECK_KIST_SUPPORT
  770. AS_IF([test "x$have_kist_support" = "xyes"],
  771. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  772. on this system])],
  773. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  774. LIBS="$save_LIBS"
  775. LDFLAGS="$save_LDFLAGS"
  776. CPPFLAGS="$save_CPPFLAGS"
  777. dnl ------------------------------------------------------
  778. dnl Where do you live, zlib? And how do we call you?
  779. tor_zlib_pkg_redhat="zlib"
  780. tor_zlib_pkg_debian="zlib1g"
  781. tor_zlib_devpkg_redhat="zlib-devel"
  782. tor_zlib_devpkg_debian="zlib1g-dev"
  783. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  784. [#include <zlib.h>],
  785. [const char * zlibVersion(void);],
  786. [zlibVersion();], [--with-zlib-dir],
  787. [/opt/zlib])
  788. if test "$enable_static_zlib" = "yes"; then
  789. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  790. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  791. using --enable-static-zlib")
  792. else
  793. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  794. fi
  795. else
  796. TOR_ZLIB_LIBS="-lz"
  797. fi
  798. AC_SUBST(TOR_ZLIB_LIBS)
  799. dnl ------------------------------------------------------
  800. dnl Where we do we find lzma?
  801. AC_ARG_ENABLE(lzma,
  802. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  803. [case "${enableval}" in
  804. "yes") lzma=true ;;
  805. "no") lzma=false ;;
  806. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  807. esac], [lzma=auto])
  808. if test "x$enable_lzma" = "xno"; then
  809. have_lzma=no;
  810. else
  811. PKG_CHECK_MODULES([LZMA],
  812. [liblzma],
  813. have_lzma=yes,
  814. have_lzma=no)
  815. if test "x$have_lzma" = "xno" ; then
  816. AC_MSG_WARN([Unable to find liblzma.])
  817. fi
  818. fi
  819. if test "x$have_lzma" = "xyes"; then
  820. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  821. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  822. TOR_LZMA_LIBS="${LZMA_LIBS}"
  823. fi
  824. AC_SUBST(TOR_LZMA_CFLAGS)
  825. AC_SUBST(TOR_LZMA_LIBS)
  826. dnl ------------------------------------------------------
  827. dnl Where we do we find zstd?
  828. AC_ARG_ENABLE(zstd,
  829. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  830. [case "${enableval}" in
  831. "yes") zstd=true ;;
  832. "no") zstd=false ;;
  833. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  834. esac], [zstd=auto])
  835. if test "x$enable_zstd" = "xno"; then
  836. have_zstd=no;
  837. else
  838. PKG_CHECK_MODULES([ZSTD],
  839. [libzstd >= 1.1],
  840. have_zstd=yes,
  841. have_zstd=no)
  842. if test "x$have_zstd" = "xno" ; then
  843. AC_MSG_WARN([Unable to find libzstd.])
  844. fi
  845. fi
  846. if test "x$have_zstd" = "xyes"; then
  847. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  848. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  849. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  850. dnl now check for zstd functions
  851. save_LIBS="$LIBS"
  852. save_CFLAGS="$CFLAGS"
  853. LIBS="$LIBS $ZSTD_LIBS"
  854. CFLAGS="$CFLAGS $ZSTD_CFLAGS"
  855. AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
  856. ZSTD_estimateDCtxSize)
  857. LIBS="$save_LIBS"
  858. CFLAGS="$save_CFLAGS"
  859. fi
  860. AC_SUBST(TOR_ZSTD_CFLAGS)
  861. AC_SUBST(TOR_ZSTD_LIBS)
  862. dnl ----------------------------------------------------------------------
  863. dnl Check if libcap is available for capabilities.
  864. tor_cap_pkg_debian="libcap2"
  865. tor_cap_pkg_redhat="libcap"
  866. tor_cap_devpkg_debian="libcap-dev"
  867. tor_cap_devpkg_redhat="libcap-devel"
  868. AC_CHECK_LIB([cap], [cap_init], [],
  869. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  870. )
  871. AC_CHECK_FUNCS(cap_set_proc)
  872. dnl ---------------------------------------------------------------------
  873. dnl Now that we know about our major libraries, we can check for compiler
  874. dnl and linker hardening options. We need to do this with the libraries known,
  875. dnl since sometimes the linker will like an option but not be willing to
  876. dnl use it with a build of a library.
  877. all_ldflags_for_check="$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. # Now make sure that NULL can be represented as zero bytes.
  1373. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1374. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1375. [[#include <stdlib.h>
  1376. #include <string.h>
  1377. #include <stdio.h>
  1378. #ifdef HAVE_STDDEF_H
  1379. #include <stddef.h>
  1380. #endif
  1381. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1382. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1383. [tor_cv_null_is_zero=yes],
  1384. [tor_cv_null_is_zero=no],
  1385. [tor_cv_null_is_zero=cross])])
  1386. if test "$tor_cv_null_is_zero" = "cross"; then
  1387. # Cross-compiling; let's hope that the target isn't raving mad.
  1388. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1389. fi
  1390. if test "$tor_cv_null_is_zero" != "no"; then
  1391. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1392. [Define to 1 iff memset(0) sets pointers to NULL])
  1393. fi
  1394. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1395. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1396. [[#include <stdlib.h>
  1397. #include <string.h>
  1398. #include <stdio.h>
  1399. #ifdef HAVE_STDDEF_H
  1400. #include <stddef.h>
  1401. #endif
  1402. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1403. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1404. [tor_cv_dbl0_is_zero=yes],
  1405. [tor_cv_dbl0_is_zero=no],
  1406. [tor_cv_dbl0_is_zero=cross])])
  1407. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1408. # Cross-compiling; let's hope that the target isn't raving mad.
  1409. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1410. fi
  1411. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1412. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1413. [Define to 1 iff memset(0) sets doubles to 0.0])
  1414. fi
  1415. # And what happens when we malloc zero?
  1416. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1417. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1418. [[#include <stdlib.h>
  1419. #include <string.h>
  1420. #include <stdio.h>
  1421. #ifdef HAVE_STDDEF_H
  1422. #include <stddef.h>
  1423. #endif
  1424. int main () { return malloc(0)?0:1; }]])],
  1425. [tor_cv_malloc_zero_works=yes],
  1426. [tor_cv_malloc_zero_works=no],
  1427. [tor_cv_malloc_zero_works=cross])])
  1428. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1429. # Cross-compiling; let's hope that the target isn't raving mad.
  1430. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1431. fi
  1432. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1433. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1434. [Define to 1 iff malloc(0) returns a pointer])
  1435. fi
  1436. # whether we seem to be in a 2s-complement world.
  1437. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1438. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1439. [[int main () { int problem = ((-99) != (~99)+1);
  1440. return problem ? 1 : 0; }]])],
  1441. [tor_cv_twos_complement=yes],
  1442. [tor_cv_twos_complement=no],
  1443. [tor_cv_twos_complement=cross])])
  1444. if test "$tor_cv_twos_complement" = "cross"; then
  1445. # Cross-compiling; let's hope that the target isn't raving mad.
  1446. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1447. fi
  1448. if test "$tor_cv_twos_complement" != "no"; then
  1449. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1450. [Define to 1 iff we represent negative integers with
  1451. two's complement])
  1452. fi
  1453. # What does shifting a negative value do?
  1454. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1455. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1456. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1457. [tor_cv_sign_extend=yes],
  1458. [tor_cv_sign_extend=no],
  1459. [tor_cv_sign_extend=cross])])
  1460. if test "$tor_cv_sign_extend" = "cross"; then
  1461. # Cross-compiling; let's hope that the target isn't raving mad.
  1462. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1463. fi
  1464. if test "$tor_cv_sign_extend" != "no"; then
  1465. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1466. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1467. fi
  1468. # Is uint8_t the same type as unsigned char?
  1469. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1470. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1471. #include <stdint.h>
  1472. extern uint8_t c;
  1473. unsigned char c;]])],
  1474. [tor_cv_uint8_uchar=yes],
  1475. [tor_cv_uint8_uchar=no],
  1476. [tor_cv_uint8_uchar=cross])])
  1477. if test "$tor_cv_uint8_uchar" = "cross"; then
  1478. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1479. fi
  1480. if test "$tor_cv_uint8_uchar" = "no"; then
  1481. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1482. fi
  1483. # Whether we should use the dmalloc memory allocation debugging library.
  1484. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1485. AC_ARG_WITH(dmalloc,
  1486. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1487. [if [[ "$withval" = "yes" ]]; then
  1488. dmalloc=1
  1489. AC_MSG_RESULT(yes)
  1490. else
  1491. dmalloc=1
  1492. AC_MSG_RESULT(no)
  1493. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1494. )
  1495. if [[ $dmalloc -eq 1 ]]; then
  1496. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1497. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1498. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1499. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1500. fi
  1501. AC_ARG_WITH(tcmalloc,
  1502. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1503. [ tcmalloc=yes ], [ tcmalloc=no ])
  1504. if test "x$tcmalloc" = "xyes"; then
  1505. LDFLAGS="-ltcmalloc $LDFLAGS"
  1506. fi
  1507. using_custom_malloc=no
  1508. if test "x$enable_openbsd_malloc" = "xyes"; then
  1509. using_custom_malloc=yes
  1510. fi
  1511. if test "x$tcmalloc" = "xyes"; then
  1512. using_custom_malloc=yes
  1513. fi
  1514. if test "$using_custom_malloc" = "no"; then
  1515. AC_CHECK_FUNCS(mallinfo)
  1516. fi
  1517. # By default, we're going to assume we don't have mlockall()
  1518. # bionic and other platforms have various broken mlockall subsystems.
  1519. # Some systems don't have a working mlockall, some aren't linkable,
  1520. # and some have it but don't declare it.
  1521. AC_CHECK_FUNCS(mlockall)
  1522. AC_CHECK_DECLS([mlockall], , , [
  1523. #ifdef HAVE_SYS_MMAN_H
  1524. #include <sys/mman.h>
  1525. #endif])
  1526. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1527. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1528. # using macros
  1529. AC_CHECK_DECLS([getpagesize], , , [
  1530. #ifdef HAVE_UNISTD_H
  1531. #include <unistd.h>
  1532. #endif])
  1533. # Allow user to specify an alternate syslog facility
  1534. AC_ARG_WITH(syslog-facility,
  1535. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1536. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1537. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1538. AC_SUBST(LOGFACILITY)
  1539. # Check if we have getresuid and getresgid
  1540. AC_CHECK_FUNCS(getresuid getresgid)
  1541. # Check for gethostbyname_r in all its glorious incompatible versions.
  1542. # (This logic is based on that in Python's configure.in)
  1543. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1544. [Define this if you have any gethostbyname_r()])
  1545. AC_CHECK_FUNC(gethostbyname_r, [
  1546. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1547. OLD_CFLAGS=$CFLAGS
  1548. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1549. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1550. #include <netdb.h>
  1551. ]], [[
  1552. char *cp1, *cp2;
  1553. struct hostent *h1, *h2;
  1554. int i1, i2;
  1555. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1556. ]])],[
  1557. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1558. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1559. [Define this if gethostbyname_r takes 6 arguments])
  1560. AC_MSG_RESULT(6)
  1561. ], [
  1562. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1563. #include <netdb.h>
  1564. ]], [[
  1565. char *cp1, *cp2;
  1566. struct hostent *h1;
  1567. int i1, i2;
  1568. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1569. ]])], [
  1570. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1571. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1572. [Define this if gethostbyname_r takes 5 arguments])
  1573. AC_MSG_RESULT(5)
  1574. ], [
  1575. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1576. #include <netdb.h>
  1577. ]], [[
  1578. char *cp1;
  1579. struct hostent *h1;
  1580. struct hostent_data hd;
  1581. (void) gethostbyname_r(cp1,h1,&hd);
  1582. ]])], [
  1583. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1584. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1585. [Define this if gethostbyname_r takes 3 arguments])
  1586. AC_MSG_RESULT(3)
  1587. ], [
  1588. AC_MSG_RESULT(0)
  1589. ])
  1590. ])
  1591. ])
  1592. CFLAGS=$OLD_CFLAGS
  1593. ])
  1594. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1595. tor_cv_have_func_macro,
  1596. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1597. #include <stdio.h>
  1598. int main(int c, char **v) { puts(__func__); }])],
  1599. tor_cv_have_func_macro=yes,
  1600. tor_cv_have_func_macro=no))
  1601. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1602. tor_cv_have_FUNC_macro,
  1603. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1604. #include <stdio.h>
  1605. int main(int c, char **v) { puts(__FUNC__); }])],
  1606. tor_cv_have_FUNC_macro=yes,
  1607. tor_cv_have_FUNC_macro=no))
  1608. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1609. tor_cv_have_FUNCTION_macro,
  1610. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1611. #include <stdio.h>
  1612. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1613. tor_cv_have_FUNCTION_macro=yes,
  1614. tor_cv_have_FUNCTION_macro=no))
  1615. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1616. tor_cv_have_environ_declared,
  1617. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1618. #ifdef HAVE_UNISTD_H
  1619. #include <unistd.h>
  1620. #endif
  1621. #include <stdlib.h>
  1622. int main(int c, char **v) { char **t = environ; }])],
  1623. tor_cv_have_environ_declared=yes,
  1624. tor_cv_have_environ_declared=no))
  1625. if test "$tor_cv_have_func_macro" = "yes"; then
  1626. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1627. fi
  1628. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1629. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1630. fi
  1631. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1632. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1633. [Defined if the compiler supports __FUNCTION__])
  1634. fi
  1635. if test "$tor_cv_have_environ_declared" = "yes"; then
  1636. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1637. [Defined if we have extern char **environ already declared])
  1638. fi
  1639. # $prefix stores the value of the --prefix command line option, or
  1640. # NONE if the option wasn't set. In the case that it wasn't set, make
  1641. # it be the default, so that we can use it to expand directories now.
  1642. if test "x$prefix" = "xNONE"; then
  1643. prefix=$ac_default_prefix
  1644. fi
  1645. # and similarly for $exec_prefix
  1646. if test "x$exec_prefix" = "xNONE"; then
  1647. exec_prefix=$prefix
  1648. fi
  1649. if test "x$BUILDDIR" = "x"; then
  1650. BUILDDIR=`pwd`
  1651. fi
  1652. AC_SUBST(BUILDDIR)
  1653. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1654. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1655. if test "x$CONFDIR" = "x"; then
  1656. CONFDIR=`eval echo $sysconfdir/tor`
  1657. fi
  1658. AC_SUBST(CONFDIR)
  1659. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1660. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1661. BINDIR=`eval echo $bindir`
  1662. AC_SUBST(BINDIR)
  1663. LOCALSTATEDIR=`eval echo $localstatedir`
  1664. AC_SUBST(LOCALSTATEDIR)
  1665. if test "$bwin32" = "true"; then
  1666. # Test if the linker supports the --nxcompat and --dynamicbase options
  1667. # for Windows
  1668. save_LDFLAGS="$LDFLAGS"
  1669. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1670. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1671. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1672. [AC_MSG_RESULT([yes])]
  1673. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1674. [AC_MSG_RESULT([no])]
  1675. )
  1676. LDFLAGS="$save_LDFLAGS"
  1677. fi
  1678. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1679. # than autoconf's macros like.
  1680. if test "$GCC" = "yes"; then
  1681. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1682. # accident waiting to happen.
  1683. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1684. else
  1685. # Override optimization level for non-gcc compilers
  1686. CFLAGS="$CFLAGS -O"
  1687. enable_gcc_warnings=no
  1688. enable_gcc_warnings_advisory=no
  1689. fi
  1690. # Warnings implies advisory-warnings and -Werror.
  1691. if test "$enable_gcc_warnings" = "yes"; then
  1692. enable_gcc_warnings_advisory=yes
  1693. enable_fatal_warnings=yes
  1694. fi
  1695. # OS X Lion started deprecating the system openssl. Let's just disable
  1696. # all deprecation warnings on OS X. Also, to potentially make the binary
  1697. # a little smaller, let's enable dead_strip.
  1698. case "$host_os" in
  1699. darwin*)
  1700. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1701. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1702. esac
  1703. # Add some more warnings which we use in development but not in the
  1704. # released versions. (Some relevant gcc versions can't handle these.)
  1705. #
  1706. # Note that we have to do this near the end of the autoconf process, or
  1707. # else we may run into problems when these warnings hit on the testing C
  1708. # programs that autoconf wants to build.
  1709. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1710. case "$host" in
  1711. *-*-openbsd* | *-*-bitrig*)
  1712. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1713. # That's fine, except that the headers don't pass -Wredundant-decls.
  1714. # Therefore, let's disable -Wsystem-headers when we're building
  1715. # with maximal warnings on OpenBSD.
  1716. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1717. esac
  1718. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1719. # have it work better.
  1720. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1721. # This warning was added in gcc 4.3, but it appears to generate
  1722. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1723. #CFLAGS="$CFLAGS -Wlogical-op"
  1724. m4_foreach_w([warning_flag], [
  1725. -Waddress
  1726. -Waddress-of-array-temporary
  1727. -Waddress-of-temporary
  1728. -Wambiguous-macro
  1729. -Wanonymous-pack-parens
  1730. -Warc
  1731. -Warc-abi
  1732. -Warc-bridge-casts-disallowed-in-nonarc
  1733. -Warc-maybe-repeated-use-of-weak
  1734. -Warc-performSelector-leaks
  1735. -Warc-repeated-use-of-weak
  1736. -Warray-bounds
  1737. -Warray-bounds-pointer-arithmetic
  1738. -Wasm
  1739. -Wasm-operand-widths
  1740. -Watomic-properties
  1741. -Watomic-property-with-user-defined-accessor
  1742. -Wauto-import
  1743. -Wauto-storage-class
  1744. -Wauto-var-id
  1745. -Wavailability
  1746. -Wbackslash-newline-escape
  1747. -Wbad-array-new-length
  1748. -Wbind-to-temporary-copy
  1749. -Wbitfield-constant-conversion
  1750. -Wbool-conversion
  1751. -Wbool-conversions
  1752. -Wbuiltin-requires-header
  1753. -Wchar-align
  1754. -Wcompare-distinct-pointer-types
  1755. -Wcomplex-component-init
  1756. -Wconditional-type-mismatch
  1757. -Wconfig-macros
  1758. -Wconstant-conversion
  1759. -Wconstant-logical-operand
  1760. -Wconstexpr-not-const
  1761. -Wcustom-atomic-properties
  1762. -Wdangling-field
  1763. -Wdangling-initializer-list
  1764. -Wdate-time
  1765. -Wdelegating-ctor-cycles
  1766. -Wdeprecated-implementations
  1767. -Wdeprecated-register
  1768. -Wdirect-ivar-access
  1769. -Wdiscard-qual
  1770. -Wdistributed-object-modifiers
  1771. -Wdivision-by-zero
  1772. -Wdollar-in-identifier-extension
  1773. -Wdouble-promotion
  1774. -Wduplicate-decl-specifier
  1775. -Wduplicate-enum
  1776. -Wduplicate-method-arg
  1777. -Wduplicate-method-match
  1778. -Wduplicated-cond
  1779. -Wdynamic-class-memaccess
  1780. -Wembedded-directive
  1781. -Wempty-translation-unit
  1782. -Wenum-conversion
  1783. -Wexit-time-destructors
  1784. -Wexplicit-ownership-type
  1785. -Wextern-initializer
  1786. -Wextra
  1787. -Wextra-semi
  1788. -Wextra-tokens
  1789. -Wflexible-array-extensions
  1790. -Wfloat-conversion
  1791. -Wformat-non-iso
  1792. -Wfour-char-constants
  1793. -Wgcc-compat
  1794. -Wglobal-constructors
  1795. -Wgnu-array-member-paren-init
  1796. -Wgnu-designator
  1797. -Wgnu-static-float-init
  1798. -Wheader-guard
  1799. -Wheader-hygiene
  1800. -Widiomatic-parentheses
  1801. -Wignored-attributes
  1802. -Wimplicit-atomic-properties
  1803. -Wimplicit-conversion-floating-point-to-bool
  1804. -Wimplicit-exception-spec-mismatch
  1805. -Wimplicit-fallthrough
  1806. -Wimplicit-fallthrough-per-function
  1807. -Wimplicit-retain-self
  1808. -Wimport-preprocessor-directive-pedantic
  1809. -Wincompatible-library-redeclaration
  1810. -Wincompatible-pointer-types-discards-qualifiers
  1811. -Wincomplete-implementation
  1812. -Wincomplete-module
  1813. -Wincomplete-umbrella
  1814. -Winit-self
  1815. -Wint-conversions
  1816. -Wint-to-void-pointer-cast
  1817. -Winteger-overflow
  1818. -Winvalid-constexpr
  1819. -Winvalid-iboutlet
  1820. -Winvalid-noreturn
  1821. -Winvalid-pp-token
  1822. -Winvalid-source-encoding
  1823. -Winvalid-token-paste
  1824. -Wknr-promoted-parameter
  1825. -Wlarge-by-value-copy
  1826. -Wliteral-conversion
  1827. -Wliteral-range
  1828. -Wlocal-type-template-args
  1829. -Wlogical-op
  1830. -Wloop-analysis
  1831. -Wmain-return-type
  1832. -Wmalformed-warning-check
  1833. -Wmethod-signatures
  1834. -Wmicrosoft
  1835. -Wmicrosoft-exists
  1836. -Wmismatched-parameter-types
  1837. -Wmismatched-return-types
  1838. -Wmissing-field-initializers
  1839. -Wmissing-format-attribute
  1840. -Wmissing-noreturn
  1841. -Wmissing-selector-name
  1842. -Wmissing-sysroot
  1843. -Wmissing-variable-declarations
  1844. -Wmodule-conflict
  1845. -Wnested-anon-types
  1846. -Wnewline-eof
  1847. -Wnon-literal-null-conversion
  1848. -Wnon-pod-varargs
  1849. -Wnonportable-cfstrings
  1850. -Wnormalized=nfkc
  1851. -Wnull-arithmetic
  1852. -Wnull-character
  1853. -Wnull-conversion
  1854. -Wnull-dereference
  1855. -Wout-of-line-declaration
  1856. -Wover-aligned
  1857. -Woverlength-strings
  1858. -Woverride-init
  1859. -Woverriding-method-mismatch
  1860. -Wpointer-type-mismatch
  1861. -Wpredefined-identifier-outside-function
  1862. -Wprotocol-property-synthesis-ambiguity
  1863. -Wreadonly-iboutlet-property
  1864. -Wreadonly-setter-attrs
  1865. -Wreceiver-expr
  1866. -Wreceiver-forward-class
  1867. -Wreceiver-is-weak
  1868. -Wreinterpret-base-class
  1869. -Wrequires-super-attribute
  1870. -Wreserved-user-defined-literal
  1871. -Wreturn-stack-address
  1872. -Wsection
  1873. -Wselector-type-mismatch
  1874. -Wsentinel
  1875. -Wserialized-diagnostics
  1876. -Wshadow
  1877. -Wshift-count-negative
  1878. -Wshift-count-overflow
  1879. -Wshift-negative-value
  1880. -Wshift-overflow=2
  1881. -Wshift-sign-overflow
  1882. -Wshorten-64-to-32
  1883. -Wsizeof-array-argument
  1884. -Wsource-uses-openmp
  1885. -Wstatic-float-init
  1886. -Wstatic-in-inline
  1887. -Wstatic-local-in-inline
  1888. -Wstrict-overflow=1
  1889. -Wstring-compare
  1890. -Wstring-conversion
  1891. -Wstrlcpy-strlcat-size
  1892. -Wstrncat-size
  1893. -Wsuggest-attribute=format
  1894. -Wsuggest-attribute=noreturn
  1895. -Wsuper-class-method-mismatch
  1896. -Wswitch-bool
  1897. -Wsync-nand
  1898. -Wtautological-constant-out-of-range-compare
  1899. -Wtentative-definition-incomplete-type
  1900. -Wtrampolines
  1901. -Wtype-safety
  1902. -Wtypedef-redefinition
  1903. -Wtypename-missing
  1904. -Wundefined-inline
  1905. -Wundefined-internal
  1906. -Wundefined-reinterpret-cast
  1907. -Wunicode
  1908. -Wunicode-whitespace
  1909. -Wunknown-warning-option
  1910. -Wunnamed-type-template-args
  1911. -Wunneeded-member-function
  1912. -Wunsequenced
  1913. -Wunsupported-visibility
  1914. -Wunused-but-set-parameter
  1915. -Wunused-but-set-variable
  1916. -Wunused-command-line-argument
  1917. -Wunused-const-variable=2
  1918. -Wunused-exception-parameter
  1919. -Wunused-local-typedefs
  1920. -Wunused-member-function
  1921. -Wunused-sanitize-argument
  1922. -Wunused-volatile-lvalue
  1923. -Wuser-defined-literals
  1924. -Wvariadic-macros
  1925. -Wvector-conversion
  1926. -Wvector-conversions
  1927. -Wvexing-parse
  1928. -Wvisibility
  1929. -Wvla-extension
  1930. -Wzero-length-array
  1931. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1932. dnl We should re-enable this in some later version. Clang doesn't
  1933. dnl mind, but it causes trouble with GCC.
  1934. dnl -Wstrict-overflow=2
  1935. dnl These seem to require annotations that we don't currently use,
  1936. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1937. dnl -Wthread-safety
  1938. dnl -Wthread-safety-analysis
  1939. dnl -Wthread-safety-attributes
  1940. dnl -Wthread-safety-beta
  1941. dnl -Wthread-safety-precise
  1942. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1943. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1944. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1945. CFLAGS="$CFLAGS -Wwrite-strings"
  1946. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1947. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1948. CFLAGS="$CFLAGS -Wunused-parameter "
  1949. # These interfere with building main() { return 0; }, which autoconf
  1950. # likes to use as its default program.
  1951. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1952. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1953. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1954. fi
  1955. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1956. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1957. fi
  1958. if test "x$enable_fatal_warnings" = "xyes"; then
  1959. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1960. # default autoconf programs are full of errors.
  1961. CFLAGS="$CFLAGS -Werror"
  1962. fi
  1963. fi
  1964. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1965. case "$host_os" in
  1966. darwin*)
  1967. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1968. esac
  1969. fi
  1970. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1971. AC_CONFIG_FILES([
  1972. Doxyfile
  1973. Makefile
  1974. contrib/dist/suse/tor.sh
  1975. contrib/operator-tools/tor.logrotate
  1976. contrib/dist/tor.sh
  1977. contrib/dist/torctl
  1978. contrib/dist/tor.service
  1979. src/config/torrc.sample
  1980. src/config/torrc.minimal
  1981. src/rust/.cargo/config
  1982. scripts/maint/checkOptionDocs.pl
  1983. scripts/maint/updateVersions.pl
  1984. ])
  1985. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1986. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1987. for file in $regular_mans ; do
  1988. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1989. echo "==================================";
  1990. echo;
  1991. echo "Building Tor has failed since manpages cannot be built.";
  1992. echo;
  1993. echo "You need asciidoc installed to be able to build the manpages.";
  1994. echo "To build without manpages, use the --disable-asciidoc argument";
  1995. echo "when calling configure.";
  1996. echo;
  1997. echo "==================================";
  1998. exit 1;
  1999. fi
  2000. done
  2001. fi
  2002. if test "$fragile_hardening" = "yes"; then
  2003. AC_MSG_WARN([
  2004. ============
  2005. Warning! Building Tor with --enable-fragile-hardening (also known as
  2006. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  2007. other kinds of attacks easier. A Tor instance build with this option will be
  2008. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  2009. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  2010. denial of service attacks. For more information, see
  2011. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  2012. ============
  2013. ])
  2014. fi
  2015. AC_OUTPUT