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],[0.3.3.8-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_USE_SYSTEM_EXTENSIONS
  16. AC_CANONICAL_HOST
  17. PKG_PROG_PKG_CONFIG
  18. if test -f "/etc/redhat-release"; then
  19. if test -f "/usr/kerberos/include"; then
  20. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  21. fi
  22. fi
  23. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  24. # the += operator on it in src/or/Makefile.am
  25. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  28. AC_ARG_ENABLE(static-openssl,
  29. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  30. AC_ARG_ENABLE(static-libevent,
  31. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  32. AC_ARG_ENABLE(static-zlib,
  33. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  34. AC_ARG_ENABLE(static-tor,
  35. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  36. AC_ARG_ENABLE(unittests,
  37. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  38. AC_ARG_ENABLE(coverage,
  39. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  40. AC_ARG_ENABLE(asserts-in-tests,
  41. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  42. AC_ARG_ENABLE(system-torrc,
  43. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  44. AC_ARG_ENABLE(libfuzzer,
  45. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  46. AC_ARG_ENABLE(oss-fuzz,
  47. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  48. AC_ARG_ENABLE(memory-sentinels,
  49. AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
  50. AC_ARG_ENABLE(rust,
  51. AS_HELP_STRING(--enable-rust, [enable rust integration]))
  52. AC_ARG_ENABLE(cargo-online-mode,
  53. AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
  54. AC_ARG_ENABLE(restart-debugging,
  55. AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
  56. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  57. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  58. fi
  59. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  60. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  61. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  62. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  63. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  64. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  65. if test "$enable_static_tor" = "yes"; then
  66. enable_static_libevent="yes";
  67. enable_static_openssl="yes";
  68. enable_static_zlib="yes";
  69. CFLAGS="$CFLAGS -static"
  70. fi
  71. if test "$enable_system_torrc" = "no"; then
  72. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  73. [Defined if we're not going to look for a torrc in SYSCONF])
  74. fi
  75. if test "$enable_memory_sentinels" = "no"; then
  76. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  77. [Defined if we're turning off memory safety code to look for bugs])
  78. fi
  79. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  80. AC_ARG_ENABLE(asciidoc,
  81. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  82. [case "${enableval}" in
  83. "yes") asciidoc=true ;;
  84. "no") asciidoc=false ;;
  85. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  86. esac], [asciidoc=true])
  87. # systemd notify support
  88. AC_ARG_ENABLE(systemd,
  89. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  90. [case "${enableval}" in
  91. "yes") systemd=true ;;
  92. "no") systemd=false ;;
  93. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  94. esac], [systemd=auto])
  95. if test "$enable_restart_debugging" = "yes"; then
  96. AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
  97. [Defined if we're building with support for in-process restart debugging.])
  98. fi
  99. # systemd support
  100. if test "x$enable_systemd" = "xno"; then
  101. have_systemd=no;
  102. else
  103. PKG_CHECK_MODULES(SYSTEMD,
  104. [libsystemd-daemon],
  105. have_systemd=yes,
  106. have_systemd=no)
  107. if test "x$have_systemd" = "xno"; then
  108. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  109. PKG_CHECK_MODULES(SYSTEMD,
  110. [libsystemd],
  111. have_systemd=yes,
  112. have_systemd=no)
  113. fi
  114. fi
  115. if test "x$have_systemd" = "xyes"; then
  116. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  117. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  118. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  119. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  120. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  121. fi
  122. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  123. AC_SUBST(TOR_SYSTEMD_LIBS)
  124. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  125. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  126. fi
  127. case "$host" in
  128. *-*-solaris* )
  129. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  130. ;;
  131. esac
  132. AC_ARG_ENABLE(gcc-warnings,
  133. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  134. AC_ARG_ENABLE(fatal-warnings,
  135. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  136. AC_ARG_ENABLE(gcc-warnings-advisory,
  137. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  138. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  139. AC_ARG_ENABLE(gcc-hardening,
  140. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  141. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  142. AC_ARG_ENABLE(expensive-hardening,
  143. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  144. AC_ARG_ENABLE(fragile-hardening,
  145. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  146. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  147. fragile_hardening="yes"
  148. fi
  149. dnl Linker hardening options
  150. dnl Currently these options are ELF specific - you can't use this with MacOSX
  151. AC_ARG_ENABLE(linker-hardening,
  152. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  153. AC_ARG_ENABLE(local-appdata,
  154. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  155. if test "$enable_local_appdata" = "yes"; then
  156. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  157. [Defined if we default to host local appdata paths on Windows])
  158. fi
  159. # Tor2web mode flag
  160. AC_ARG_ENABLE(tor2web-mode,
  161. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  162. [if test "x$enableval" = "xyes"; then
  163. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  164. fi])
  165. AC_ARG_ENABLE(tool-name-check,
  166. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  167. AC_ARG_ENABLE(seccomp,
  168. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  169. AC_ARG_ENABLE(libscrypt,
  170. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  171. dnl Enable event tracing which are transformed to debug log statement.
  172. AC_ARG_ENABLE(event-tracing-debug,
  173. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  174. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  175. if test x$enable_event_tracing_debug = xyes; then
  176. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  177. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  178. fi
  179. dnl Enable Android only features.
  180. AC_ARG_ENABLE(android,
  181. AS_HELP_STRING(--enable-android, [build with Android features enabled]))
  182. AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
  183. if test "x$enable_android" = "xyes"; then
  184. AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
  185. dnl Check if the Android log library is available.
  186. AC_CHECK_HEADERS([android/log.h])
  187. AC_SEARCH_LIBS(__android_log_write, [log])
  188. fi
  189. dnl check for the correct "ar" when cross-compiling.
  190. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  191. dnl so kludge up a replacement for the case where it isn't there yet.)
  192. m4_ifdef([AM_PROG_AR],
  193. [AM_PROG_AR],
  194. [AN_MAKEVAR([AR], [AC_PROG_AR])
  195. AN_PROGRAM([ar], [AC_PROG_AR])
  196. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  197. AC_PROG_AR])
  198. dnl Check whether the above macro has settled for a simply named tool even
  199. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  200. dnl because that will find any cc on the system, not only the cross-compiler,
  201. dnl and then verify that a binary built with this compiler runs on the
  202. dnl build system. It will then come to the false conclusion that we're not
  203. dnl cross-compiling.
  204. if test "x$enable_tool_name_check" != "xno"; then
  205. if test "x$ac_tool_warned" = "xyes"; then
  206. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  207. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  208. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  209. fi
  210. fi
  211. AC_PROG_CC
  212. AC_PROG_CPP
  213. AC_PROG_MAKE_SET
  214. AC_PROG_RANLIB
  215. AC_PROG_SED
  216. AC_ARG_VAR([PERL], [path to Perl binary])
  217. AC_CHECK_PROGS([PERL], [perl])
  218. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  219. dnl check for asciidoc and a2x
  220. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  221. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  222. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  223. AM_PROG_CC_C_O
  224. AC_PROG_CC_C99
  225. AC_ARG_VAR([PYTHON], [path to Python binary])
  226. AC_CHECK_PROGS(PYTHON, [ \
  227. python3 \
  228. python3.8 python3.7 python3.6 python3.5 python3.4 \
  229. python \
  230. python2 python2.7])
  231. if test "x$PYTHON" = "x"; then
  232. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  233. fi
  234. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  235. dnl List all external rust crates we depend on here. Include the version
  236. rust_crates="libc-0.2.39"
  237. AC_SUBST(rust_crates)
  238. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  239. AC_C_FLEXIBLE_ARRAY_MEMBER
  240. ], [
  241. dnl Maybe we've got an old autoconf...
  242. AC_CACHE_CHECK([for flexible array members],
  243. tor_cv_c_flexarray,
  244. [AC_COMPILE_IFELSE(
  245. AC_LANG_PROGRAM([
  246. struct abc { int a; char b[]; };
  247. ], [
  248. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  249. def->b[0] = 33;
  250. ]),
  251. [tor_cv_c_flexarray=yes],
  252. [tor_cv_c_flexarray=no])])
  253. if test "$tor_cv_flexarray" = "yes"; then
  254. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  255. else
  256. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  257. fi
  258. ])
  259. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  260. tor_cv_c_c99_decl,
  261. [AC_COMPILE_IFELSE(
  262. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  263. [tor_cv_c_c99_decl=yes],
  264. [tor_cv_c_c99_decl=no] )])
  265. if test "$tor_cv_c_c99_decl" != "yes"; then
  266. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  267. fi
  268. AC_CACHE_CHECK([for working C99 designated initializers],
  269. tor_cv_c_c99_designated_init,
  270. [AC_COMPILE_IFELSE(
  271. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  272. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  273. [tor_cv_c_c99_designated_init=yes],
  274. [tor_cv_c_c99_designated_init=no] )])
  275. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  276. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  277. fi
  278. TORUSER=_tor
  279. AC_ARG_WITH(tor-user,
  280. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  281. [
  282. TORUSER=$withval
  283. ]
  284. )
  285. AC_SUBST(TORUSER)
  286. TORGROUP=_tor
  287. AC_ARG_WITH(tor-group,
  288. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  289. [
  290. TORGROUP=$withval
  291. ]
  292. )
  293. AC_SUBST(TORGROUP)
  294. dnl If _WIN32 is defined and non-zero, we are building for win32
  295. AC_MSG_CHECKING([for win32])
  296. AC_RUN_IFELSE([AC_LANG_SOURCE([
  297. int main(int c, char **v) {
  298. #ifdef _WIN32
  299. #if _WIN32
  300. return 0;
  301. #else
  302. return 1;
  303. #endif
  304. #else
  305. return 2;
  306. #endif
  307. }])],
  308. bwin32=true; AC_MSG_RESULT([yes]),
  309. bwin32=false; AC_MSG_RESULT([no]),
  310. bwin32=cross; AC_MSG_RESULT([cross])
  311. )
  312. if test "$bwin32" = "cross"; then
  313. AC_MSG_CHECKING([for win32 (cross)])
  314. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  315. #ifdef _WIN32
  316. int main(int c, char **v) {return 0;}
  317. #else
  318. #error
  319. int main(int c, char **v) {return x(y);}
  320. #endif
  321. ])],
  322. bwin32=true; AC_MSG_RESULT([yes]),
  323. bwin32=false; AC_MSG_RESULT([no]))
  324. fi
  325. AH_BOTTOM([
  326. #ifdef _WIN32
  327. /* Defined to access windows functions and definitions for >=WinXP */
  328. # ifndef WINVER
  329. # define WINVER 0x0501
  330. # endif
  331. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  332. # ifndef _WIN32_WINNT
  333. # define _WIN32_WINNT 0x0501
  334. # endif
  335. /* Defined to avoid including some windows headers as part of Windows.h */
  336. # ifndef WIN32_LEAN_AND_MEAN
  337. # define WIN32_LEAN_AND_MEAN 1
  338. # endif
  339. #endif
  340. ])
  341. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  342. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  343. dnl Enable C99 when compiling with MIPSpro
  344. AC_MSG_CHECKING([for MIPSpro compiler])
  345. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  346. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  347. #error
  348. return x(y);
  349. #endif
  350. ])],
  351. bmipspro=false; AC_MSG_RESULT(no),
  352. bmipspro=true; AC_MSG_RESULT(yes))
  353. if test "$bmipspro" = "true"; then
  354. CFLAGS="$CFLAGS -c99"
  355. fi
  356. AC_C_BIGENDIAN
  357. if test "x$enable_rust" = "xyes"; then
  358. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  359. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  360. if test "x$RUSTC" = "xno"; then
  361. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  362. fi
  363. AC_ARG_VAR([CARGO], [path to the cargo binary])
  364. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  365. if test "x$CARGO" = "xno"; then
  366. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  367. fi
  368. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  369. if test "x$enable_cargo_online_mode" = "xyes"; then
  370. CARGO_ONLINE=
  371. RUST_DL=#
  372. else
  373. CARGO_ONLINE=--frozen
  374. RUST_DL=
  375. dnl When we're not allowed to touch the network, we need crate dependencies
  376. dnl locally available.
  377. AC_MSG_CHECKING([rust crate dependencies])
  378. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  379. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  380. TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
  381. fi
  382. dnl Check whether the path exists before we try to cd into it.
  383. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  384. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  385. ERRORED=1
  386. fi
  387. dnl Make the path absolute, since we'll be using it from within a
  388. dnl subdirectory.
  389. TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
  390. for dep in $rust_crates; do
  391. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  392. AC_MSG_ERROR([Failure to find rust dependency $TOR_RUST_DEPENDENCIES/$dep. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  393. ERRORED=1
  394. fi
  395. done
  396. if test "x$ERRORED" = "x"; then
  397. AC_MSG_RESULT([yes])
  398. fi
  399. fi
  400. dnl This is a workaround for #46797
  401. dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ). Once the
  402. dnl upstream bug is fixed, we can remove this workaround.
  403. case "$host_os" in
  404. darwin*)
  405. TOR_RUST_EXTRA_LIBS="-lresolv"
  406. ;;
  407. esac
  408. dnl For now both MSVC and MinGW rust libraries will output static libs with
  409. dnl the MSVC naming convention.
  410. if test "$bwin32" = "true"; then
  411. TOR_RUST_STATIC_NAME=tor_rust.lib
  412. else
  413. TOR_RUST_STATIC_NAME=libtor_rust.a
  414. fi
  415. AC_SUBST(TOR_RUST_STATIC_NAME)
  416. AC_SUBST(CARGO_ONLINE)
  417. AC_SUBST(RUST_DL)
  418. dnl Let's check the rustc version, too
  419. AC_MSG_CHECKING([rust version])
  420. RUSTC_VERSION=`$RUSTC --version`
  421. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  422. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  423. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  424. AC_MSG_ERROR([rustc version couldn't be identified])
  425. fi
  426. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  427. AC_MSG_ERROR([rustc must be at least version 1.14])
  428. fi
  429. AC_MSG_RESULT([$RUSTC_VERSION])
  430. fi
  431. AC_SUBST(TOR_RUST_EXTRA_LIBS)
  432. AC_SEARCH_LIBS(socket, [socket network])
  433. AC_SEARCH_LIBS(gethostbyname, [nsl])
  434. AC_SEARCH_LIBS(dlopen, [dl])
  435. AC_SEARCH_LIBS(inet_aton, [resolv])
  436. AC_SEARCH_LIBS(backtrace, [execinfo])
  437. saved_LIBS="$LIBS"
  438. AC_SEARCH_LIBS([clock_gettime], [rt])
  439. if test "$LIBS" != "$saved_LIBS"; then
  440. # Looks like we need -lrt for clock_gettime().
  441. have_rt=yes
  442. fi
  443. AC_SEARCH_LIBS(pthread_create, [pthread])
  444. AC_SEARCH_LIBS(pthread_detach, [pthread])
  445. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  446. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  447. AC_CHECK_FUNCS(
  448. _NSGetEnviron \
  449. RtlSecureZeroMemory \
  450. SecureZeroMemory \
  451. accept4 \
  452. backtrace \
  453. backtrace_symbols_fd \
  454. eventfd \
  455. explicit_bzero \
  456. timingsafe_memcmp \
  457. flock \
  458. ftime \
  459. get_current_dir_name \
  460. getaddrinfo \
  461. getifaddrs \
  462. getpass \
  463. getrlimit \
  464. gettimeofday \
  465. gmtime_r \
  466. gnu_get_libc_version \
  467. htonll \
  468. inet_aton \
  469. ioctl \
  470. issetugid \
  471. llround \
  472. localtime_r \
  473. lround \
  474. memmem \
  475. memset_s \
  476. pipe \
  477. pipe2 \
  478. prctl \
  479. readpassphrase \
  480. rint \
  481. sigaction \
  482. socketpair \
  483. statvfs \
  484. strlcat \
  485. strlcpy \
  486. strnlen \
  487. strptime \
  488. strtok_r \
  489. strtoull \
  490. sysconf \
  491. sysctl \
  492. truncate \
  493. uname \
  494. usleep \
  495. vasprintf \
  496. _vscprintf
  497. )
  498. # Apple messed up when they added some functions: they
  499. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  500. # checks.
  501. # We should only probe for these functions if we are sure that we
  502. # are not targeting OS X 10.9 or earlier.
  503. AC_MSG_CHECKING([for a pre-Yosemite OS X build target])
  504. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  505. #ifdef __APPLE__
  506. # include <AvailabilityMacros.h>
  507. # ifndef MAC_OS_X_VERSION_10_10
  508. # define MAC_OS_X_VERSION_10_10 101000
  509. # endif
  510. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  511. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
  512. # error "Running on Mac OS X 10.9 or earlier"
  513. # endif
  514. # endif
  515. #endif
  516. ]], [[]])],
  517. [on_macos_pre_10_10=no ; AC_MSG_RESULT([no])],
  518. [on_macos_pre_10_10=yes; AC_MSG_RESULT([yes])])
  519. if test "$on_macos_pre_10_10" = "no"; then
  520. AC_CHECK_FUNCS(
  521. mach_approximate_time \
  522. )
  523. fi
  524. # We should only probe for these functions if we are sure that we
  525. # are not targeting OSX 10.11 or earlier.
  526. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  527. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  528. #ifdef __APPLE__
  529. # include <AvailabilityMacros.h>
  530. # ifndef MAC_OS_X_VERSION_10_12
  531. # define MAC_OS_X_VERSION_10_12 101200
  532. # endif
  533. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  534. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  535. # error "Running on Mac OSX 10.11 or earlier"
  536. # endif
  537. # endif
  538. #endif
  539. ]], [[]])],
  540. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  541. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  542. if test "$on_macos_pre_10_12" = "no"; then
  543. AC_CHECK_FUNCS(
  544. clock_gettime \
  545. getentropy \
  546. )
  547. fi
  548. if test "$bwin32" != "true"; then
  549. AC_CHECK_HEADERS(pthread.h)
  550. AC_CHECK_FUNCS(pthread_create)
  551. AC_CHECK_FUNCS(pthread_condattr_setclock)
  552. fi
  553. if test "$bwin32" = "true"; then
  554. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  555. #include <windows.h>
  556. #include <conio.h>
  557. #include <wchar.h>
  558. ])
  559. fi
  560. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  561. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  562. dnl ------------------------------------------------------
  563. dnl Where do you live, libevent? And how do we call you?
  564. if test "$bwin32" = "true"; then
  565. TOR_LIB_WS32=-lws2_32
  566. TOR_LIB_IPHLPAPI=-liphlpapi
  567. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  568. # think it's actually necessary.
  569. TOR_LIB_GDI=-lgdi32
  570. TOR_LIB_USERENV=-luserenv
  571. else
  572. TOR_LIB_WS32=
  573. TOR_LIB_GDI=
  574. TOR_LIB_USERENV=
  575. fi
  576. AC_SUBST(TOR_LIB_WS32)
  577. AC_SUBST(TOR_LIB_GDI)
  578. AC_SUBST(TOR_LIB_IPHLPAPI)
  579. AC_SUBST(TOR_LIB_USERENV)
  580. tor_libevent_pkg_redhat="libevent"
  581. tor_libevent_pkg_debian="libevent-dev"
  582. tor_libevent_devpkg_redhat="libevent-devel"
  583. tor_libevent_devpkg_debian="libevent-dev"
  584. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  585. dnl linking for static builds.
  586. STATIC_LIBEVENT_FLAGS=""
  587. if test "$enable_static_libevent" = "yes"; then
  588. if test "$have_rt" = "yes"; then
  589. STATIC_LIBEVENT_FLAGS=" -lrt "
  590. fi
  591. fi
  592. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  593. #ifdef _WIN32
  594. #include <winsock2.h>
  595. #endif
  596. #include <sys/time.h>
  597. #include <sys/types.h>
  598. #include <event2/event.h>], [
  599. #ifdef _WIN32
  600. #include <winsock2.h>
  601. #endif
  602. struct event_base;
  603. struct event_base *event_base_new(void);
  604. void event_base_free(struct event_base *);],
  605. [
  606. #ifdef _WIN32
  607. {WSADATA d; WSAStartup(0x101,&d); }
  608. #endif
  609. event_base_free(event_base_new());
  610. ], [--with-libevent-dir], [/opt/libevent])
  611. dnl Determine the incantation needed to link libevent.
  612. save_LIBS="$LIBS"
  613. save_LDFLAGS="$LDFLAGS"
  614. save_CPPFLAGS="$CPPFLAGS"
  615. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  616. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  617. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  618. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  619. if test "$enable_static_libevent" = "yes"; then
  620. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  621. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  622. else
  623. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  624. fi
  625. else
  626. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  627. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  628. 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"))
  629. if test "$ac_cv_search_event_new" != "none required"; then
  630. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  631. fi
  632. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  633. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  634. fi
  635. else
  636. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  637. fi
  638. fi
  639. dnl Now check for particular libevent functions.
  640. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  641. evutil_secure_rng_add_bytes \
  642. ])
  643. LIBS="$save_LIBS"
  644. LDFLAGS="$save_LDFLAGS"
  645. CPPFLAGS="$save_CPPFLAGS"
  646. dnl Check that libevent is at least at version 2.0.10, the first stable
  647. dnl release of its series
  648. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  649. AC_MSG_CHECKING([whether Libevent is new enough])
  650. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  651. #include <event2/event.h>
  652. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  653. #error
  654. int x = y(zz);
  655. #else
  656. int x = 1;
  657. #endif
  658. ])], [ AC_MSG_RESULT([yes]) ],
  659. [ AC_MSG_RESULT([no])
  660. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  661. LIBS="$save_LIBS"
  662. LDFLAGS="$save_LDFLAGS"
  663. CPPFLAGS="$save_CPPFLAGS"
  664. AC_SUBST(TOR_LIBEVENT_LIBS)
  665. dnl ------------------------------------------------------
  666. dnl Where do you live, libm?
  667. dnl On some platforms (Haiku/BeOS) the math library is
  668. dnl part of libroot. In which case don't link against lm
  669. TOR_LIB_MATH=""
  670. save_LIBS="$LIBS"
  671. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  672. if test "$ac_cv_search_pow" != "none required"; then
  673. TOR_LIB_MATH="$ac_cv_search_pow"
  674. fi
  675. LIBS="$save_LIBS"
  676. AC_SUBST(TOR_LIB_MATH)
  677. dnl ------------------------------------------------------
  678. dnl Where do you live, openssl? And how do we call you?
  679. tor_openssl_pkg_redhat="openssl"
  680. tor_openssl_pkg_debian="libssl-dev"
  681. tor_openssl_devpkg_redhat="openssl-devel"
  682. tor_openssl_devpkg_debian="libssl-dev"
  683. ALT_openssl_WITHVAL=""
  684. AC_ARG_WITH(ssl-dir,
  685. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  686. [
  687. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  688. ALT_openssl_WITHVAL="$withval"
  689. fi
  690. ])
  691. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  692. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  693. [#include <openssl/ssl.h>],
  694. [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
  695. [TLSv1_1_method();], [],
  696. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  697. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  698. if test "$enable_static_openssl" = "yes"; then
  699. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  700. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  701. else
  702. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  703. fi
  704. else
  705. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  706. fi
  707. AC_SUBST(TOR_OPENSSL_LIBS)
  708. dnl Now check for particular openssl functions.
  709. save_LIBS="$LIBS"
  710. save_LDFLAGS="$LDFLAGS"
  711. save_CPPFLAGS="$CPPFLAGS"
  712. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  713. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  714. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  715. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  716. #include <openssl/opensslv.h>
  717. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  718. #error "too old"
  719. #endif
  720. ]], [[]])],
  721. [ : ],
  722. [ 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.]) ])
  723. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  724. #include <openssl/opensslv.h>
  725. #include <openssl/evp.h>
  726. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  727. #error "no ECC"
  728. #endif
  729. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  730. #error "curves unavailable"
  731. #endif
  732. ]], [[]])],
  733. [ : ],
  734. [ 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.]) ])
  735. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  736. [#include <openssl/ssl.h>
  737. ])
  738. AC_CHECK_FUNCS([ \
  739. SSL_SESSION_get_master_key \
  740. SSL_get_server_random \
  741. SSL_get_client_ciphers \
  742. SSL_get_client_random \
  743. SSL_CIPHER_find \
  744. TLS_method
  745. ])
  746. dnl Check if OpenSSL has scrypt implementation.
  747. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  748. dnl Check if OpenSSL structures are opaque
  749. AC_CHECK_MEMBERS([SSL.state], , ,
  750. [#include <openssl/ssl.h>
  751. ])
  752. dnl Define the set of checks for KIST scheduler support.
  753. AC_DEFUN([CHECK_KIST_SUPPORT],[
  754. dnl KIST needs struct tcp_info and for certain members to exist.
  755. AC_CHECK_MEMBERS(
  756. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  757. , ,[[#include <netinet/tcp.h>]])
  758. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  759. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  760. #include <linux/sockios.h>
  761. #ifndef SIOCOUTQNSD
  762. #error
  763. #endif
  764. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  765. if test "x$have_siocoutqnsd" = "xyes"; then
  766. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  767. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  768. have_kist_support=yes
  769. fi
  770. fi
  771. fi
  772. ])
  773. dnl Now, trigger the check.
  774. CHECK_KIST_SUPPORT
  775. AS_IF([test "x$have_kist_support" = "xyes"],
  776. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  777. on this system])],
  778. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  779. LIBS="$save_LIBS"
  780. LDFLAGS="$save_LDFLAGS"
  781. CPPFLAGS="$save_CPPFLAGS"
  782. dnl ------------------------------------------------------
  783. dnl Where do you live, zlib? And how do we call you?
  784. tor_zlib_pkg_redhat="zlib"
  785. tor_zlib_pkg_debian="zlib1g"
  786. tor_zlib_devpkg_redhat="zlib-devel"
  787. tor_zlib_devpkg_debian="zlib1g-dev"
  788. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  789. [#include <zlib.h>],
  790. [const char * zlibVersion(void);],
  791. [zlibVersion();], [--with-zlib-dir],
  792. [/opt/zlib])
  793. if test "$enable_static_zlib" = "yes"; then
  794. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  795. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  796. using --enable-static-zlib")
  797. else
  798. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  799. fi
  800. else
  801. TOR_ZLIB_LIBS="-lz"
  802. fi
  803. AC_SUBST(TOR_ZLIB_LIBS)
  804. dnl ------------------------------------------------------
  805. dnl Where we do we find lzma?
  806. AC_ARG_ENABLE(lzma,
  807. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  808. [case "${enableval}" in
  809. "yes") lzma=true ;;
  810. "no") lzma=false ;;
  811. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  812. esac], [lzma=auto])
  813. if test "x$enable_lzma" = "xno"; then
  814. have_lzma=no;
  815. else
  816. PKG_CHECK_MODULES([LZMA],
  817. [liblzma],
  818. have_lzma=yes,
  819. have_lzma=no)
  820. if test "x$have_lzma" = "xno" ; then
  821. AC_MSG_WARN([Unable to find liblzma.])
  822. fi
  823. fi
  824. if test "x$have_lzma" = "xyes"; then
  825. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  826. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  827. TOR_LZMA_LIBS="${LZMA_LIBS}"
  828. fi
  829. AC_SUBST(TOR_LZMA_CFLAGS)
  830. AC_SUBST(TOR_LZMA_LIBS)
  831. dnl ------------------------------------------------------
  832. dnl Where we do we find zstd?
  833. AC_ARG_ENABLE(zstd,
  834. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  835. [case "${enableval}" in
  836. "yes") zstd=true ;;
  837. "no") zstd=false ;;
  838. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  839. esac], [zstd=auto])
  840. if test "x$enable_zstd" = "xno"; then
  841. have_zstd=no;
  842. else
  843. PKG_CHECK_MODULES([ZSTD],
  844. [libzstd >= 1.1],
  845. have_zstd=yes,
  846. have_zstd=no)
  847. if test "x$have_zstd" = "xno" ; then
  848. AC_MSG_WARN([Unable to find libzstd.])
  849. fi
  850. fi
  851. if test "x$have_zstd" = "xyes"; then
  852. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  853. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  854. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  855. fi
  856. AC_SUBST(TOR_ZSTD_CFLAGS)
  857. AC_SUBST(TOR_ZSTD_LIBS)
  858. dnl ----------------------------------------------------------------------
  859. dnl Check if libcap is available for capabilities.
  860. tor_cap_pkg_debian="libcap2"
  861. tor_cap_pkg_redhat="libcap"
  862. tor_cap_devpkg_debian="libcap-dev"
  863. tor_cap_devpkg_redhat="libcap-devel"
  864. AC_CHECK_LIB([cap], [cap_init], [],
  865. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  866. )
  867. AC_CHECK_FUNCS(cap_set_proc)
  868. dnl ---------------------------------------------------------------------
  869. dnl Now that we know about our major libraries, we can check for compiler
  870. dnl and linker hardening options. We need to do this with the libraries known,
  871. dnl since sometimes the linker will like an option but not be willing to
  872. dnl use it with a build of a library.
  873. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  874. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  875. CFLAGS_FTRAPV=
  876. CFLAGS_FWRAPV=
  877. CFLAGS_ASAN=
  878. CFLAGS_UBSAN=
  879. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  880. #if !defined(__clang__)
  881. #error
  882. #endif])], have_clang=yes, have_clang=no)
  883. if test "x$enable_gcc_hardening" != "xno"; then
  884. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  885. if test "x$have_clang" = "xyes"; then
  886. TOR_CHECK_CFLAGS(-Qunused-arguments)
  887. fi
  888. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  889. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  890. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  891. m4_ifdef([AS_VAR_IF],[
  892. AS_VAR_IF(can_compile, [yes],
  893. AS_VAR_IF(can_link, [yes],
  894. [],
  895. 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.)]))
  896. )])
  897. AS_VAR_POPDEF([can_link])
  898. AS_VAR_POPDEF([can_compile])
  899. TOR_CHECK_CFLAGS(-Wstack-protector)
  900. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  901. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  902. TOR_CHECK_CFLAGS(-fPIE)
  903. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  904. fi
  905. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  906. fi
  907. if test "$fragile_hardening" = "yes"; then
  908. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  909. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  910. 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.])
  911. fi
  912. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  913. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  914. fi
  915. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  916. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  917. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  918. fi
  919. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  920. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  921. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  922. fi
  923. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  924. fi
  925. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  926. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  927. mulodi_fixes_ftrapv=no
  928. if test "$have_clang" = "yes"; then
  929. saved_CFLAGS="$CFLAGS"
  930. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  931. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  932. AC_LINK_IFELSE([
  933. AC_LANG_SOURCE([[
  934. #include <stdint.h>
  935. #include <stdlib.h>
  936. int main(int argc, char **argv)
  937. {
  938. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  939. * (int64_t)atoi(argv[3]);
  940. return x == 9;
  941. } ]])],
  942. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  943. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  944. if test "$ftrapv_can_link" = "no"; then
  945. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  946. AC_LINK_IFELSE([
  947. AC_LANG_SOURCE([[
  948. #include <stdint.h>
  949. #include <stdlib.h>
  950. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  951. *overflow=0;
  952. return a;
  953. }
  954. int main(int argc, char **argv)
  955. {
  956. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  957. * (int64_t)atoi(argv[3]);
  958. return x == 9;
  959. } ]])],
  960. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  961. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  962. fi
  963. CFLAGS="$saved_CFLAGS"
  964. fi
  965. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  966. dnl These cflags add bunches of branches, and we haven't been able to
  967. dnl persuade ourselves that they're suitable for code that needs to be
  968. dnl constant time.
  969. AC_SUBST(CFLAGS_BUGTRAP)
  970. dnl These cflags are variant ones sutable for code that needs to be
  971. dnl constant-time.
  972. AC_SUBST(CFLAGS_CONSTTIME)
  973. if test "x$enable_linker_hardening" != "xno"; then
  974. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  975. fi
  976. # For backtrace support
  977. TOR_CHECK_LDFLAGS(-rdynamic)
  978. dnl ------------------------------------------------------
  979. dnl Now see if we have a -fomit-frame-pointer compiler option.
  980. saved_CFLAGS="$CFLAGS"
  981. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  982. F_OMIT_FRAME_POINTER=''
  983. if test "$saved_CFLAGS" != "$CFLAGS"; then
  984. if test "$fragile_hardening" = "yes"; then
  985. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  986. fi
  987. fi
  988. CFLAGS="$saved_CFLAGS"
  989. AC_SUBST(F_OMIT_FRAME_POINTER)
  990. dnl ------------------------------------------------------
  991. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  992. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  993. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  994. dnl code will work.
  995. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  996. dnl ============================================================
  997. dnl Check for libseccomp
  998. if test "x$enable_seccomp" != "xno"; then
  999. AC_CHECK_HEADERS([seccomp.h])
  1000. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  1001. fi
  1002. dnl ============================================================
  1003. dnl Check for libscrypt
  1004. if test "x$enable_libscrypt" != "xno"; then
  1005. AC_CHECK_HEADERS([libscrypt.h])
  1006. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  1007. AC_CHECK_FUNCS([libscrypt_scrypt])
  1008. fi
  1009. dnl ============================================================
  1010. dnl We need an implementation of curve25519.
  1011. dnl set these defaults.
  1012. build_curve25519_donna=no
  1013. build_curve25519_donna_c64=no
  1014. use_curve25519_donna=no
  1015. use_curve25519_nacl=no
  1016. CURVE25519_LIBS=
  1017. dnl The best choice is using curve25519-donna-c64, but that requires
  1018. dnl that we
  1019. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  1020. tor_cv_can_use_curve25519_donna_c64,
  1021. [AC_RUN_IFELSE(
  1022. [AC_LANG_PROGRAM([dnl
  1023. #include <stdint.h>
  1024. typedef unsigned uint128_t __attribute__((mode(TI)));
  1025. int func(uint64_t a, uint64_t b) {
  1026. uint128_t c = ((uint128_t)a) * b;
  1027. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1028. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1029. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1030. (((uint64_t)(c))&0xffffffffL) == 0;
  1031. return ok;
  1032. }
  1033. ], [dnl
  1034. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1035. ((uint64_t)1234567890) << 24);
  1036. return !ok;
  1037. ])],
  1038. [tor_cv_can_use_curve25519_donna_c64=yes],
  1039. [tor_cv_can_use_curve25519_donna_c64=no],
  1040. [AC_LINK_IFELSE(
  1041. [AC_LANG_PROGRAM([dnl
  1042. #include <stdint.h>
  1043. typedef unsigned uint128_t __attribute__((mode(TI)));
  1044. int func(uint64_t a, uint64_t b) {
  1045. uint128_t c = ((uint128_t)a) * b;
  1046. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1047. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1048. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1049. (((uint64_t)(c))&0xffffffffL) == 0;
  1050. return ok;
  1051. }
  1052. ], [dnl
  1053. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1054. ((uint64_t)1234567890) << 24);
  1055. return !ok;
  1056. ])],
  1057. [tor_cv_can_use_curve25519_donna_c64=cross],
  1058. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1059. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1060. nacl/crypto_scalarmult_curve25519.h])
  1061. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1062. tor_cv_can_use_curve25519_nacl,
  1063. [tor_saved_LIBS="$LIBS"
  1064. LIBS="$LIBS -lnacl"
  1065. AC_LINK_IFELSE(
  1066. [AC_LANG_PROGRAM([dnl
  1067. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1068. #include <crypto_scalarmult_curve25519.h>
  1069. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1070. #include <nacl/crypto_scalarmult_curve25519.h>
  1071. #endif
  1072. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1073. #error Hey, this is the reference implementation! That's not fast.
  1074. #endif
  1075. ], [
  1076. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1077. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1078. [tor_cv_can_use_curve25519_nacl=no])
  1079. LIBS="$tor_saved_LIBS" ])
  1080. dnl Okay, now we need to figure out which one to actually use. Fall back
  1081. dnl to curve25519-donna.c
  1082. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1083. build_curve25519_donna_c64=yes
  1084. use_curve25519_donna=yes
  1085. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1086. use_curve25519_nacl=yes
  1087. CURVE25519_LIBS=-lnacl
  1088. else
  1089. build_curve25519_donna=yes
  1090. use_curve25519_donna=yes
  1091. fi
  1092. if test "x$use_curve25519_donna" = "xyes"; then
  1093. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1094. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1095. fi
  1096. if test "x$use_curve25519_nacl" = "xyes"; then
  1097. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1098. [Defined if we should use a curve25519 from nacl])
  1099. fi
  1100. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1101. test "x$build_curve25519_donna" = "xyes")
  1102. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1103. test "x$build_curve25519_donna_c64" = "xyes")
  1104. AC_SUBST(CURVE25519_LIBS)
  1105. dnl Make sure to enable support for large off_t if available.
  1106. AC_SYS_LARGEFILE
  1107. AC_CHECK_HEADERS([assert.h \
  1108. errno.h \
  1109. fcntl.h \
  1110. signal.h \
  1111. string.h \
  1112. sys/capability.h \
  1113. sys/fcntl.h \
  1114. sys/stat.h \
  1115. sys/time.h \
  1116. sys/types.h \
  1117. time.h \
  1118. unistd.h \
  1119. arpa/inet.h \
  1120. crt_externs.h \
  1121. execinfo.h \
  1122. gnu/libc-version.h \
  1123. grp.h \
  1124. ifaddrs.h \
  1125. inttypes.h \
  1126. limits.h \
  1127. linux/types.h \
  1128. machine/limits.h \
  1129. malloc.h \
  1130. malloc/malloc.h \
  1131. malloc_np.h \
  1132. netdb.h \
  1133. netinet/in.h \
  1134. netinet/in6.h \
  1135. pwd.h \
  1136. readpassphrase.h \
  1137. stdint.h \
  1138. stdatomic.h \
  1139. sys/eventfd.h \
  1140. sys/file.h \
  1141. sys/ioctl.h \
  1142. sys/limits.h \
  1143. sys/mman.h \
  1144. sys/param.h \
  1145. sys/prctl.h \
  1146. sys/random.h \
  1147. sys/resource.h \
  1148. sys/select.h \
  1149. sys/socket.h \
  1150. sys/statvfs.h \
  1151. sys/syscall.h \
  1152. sys/sysctl.h \
  1153. sys/syslimits.h \
  1154. sys/time.h \
  1155. sys/types.h \
  1156. sys/un.h \
  1157. sys/utime.h \
  1158. sys/wait.h \
  1159. syslog.h \
  1160. utime.h])
  1161. AC_CHECK_HEADERS(sys/param.h)
  1162. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1163. [#ifdef HAVE_SYS_TYPES_H
  1164. #include <sys/types.h>
  1165. #endif
  1166. #ifdef HAVE_SYS_SOCKET_H
  1167. #include <sys/socket.h>
  1168. #endif])
  1169. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1170. [#ifdef HAVE_SYS_TYPES_H
  1171. #include <sys/types.h>
  1172. #endif
  1173. #ifdef HAVE_SYS_SOCKET_H
  1174. #include <sys/socket.h>
  1175. #endif
  1176. #ifdef HAVE_NET_IF_H
  1177. #include <net/if.h>
  1178. #endif
  1179. #ifdef HAVE_NETINET_IN_H
  1180. #include <netinet/in.h>
  1181. #endif])
  1182. AC_CHECK_HEADERS(linux/if.h,[],[],
  1183. [
  1184. #ifdef HAVE_SYS_SOCKET_H
  1185. #include <sys/socket.h>
  1186. #endif
  1187. ])
  1188. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1189. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1190. [#ifdef HAVE_SYS_TYPES_H
  1191. #include <sys/types.h>
  1192. #endif
  1193. #ifdef HAVE_SYS_SOCKET_H
  1194. #include <sys/socket.h>
  1195. #endif
  1196. #ifdef HAVE_LIMITS_H
  1197. #include <limits.h>
  1198. #endif
  1199. #ifdef HAVE_LINUX_TYPES_H
  1200. #include <linux/types.h>
  1201. #endif
  1202. #ifdef HAVE_NETINET_IN6_H
  1203. #include <netinet/in6.h>
  1204. #endif
  1205. #ifdef HAVE_NETINET_IN_H
  1206. #include <netinet/in.h>
  1207. #endif])
  1208. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1209. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1210. [#ifdef HAVE_SYS_TYPES_H
  1211. #include <sys/types.h>
  1212. #endif
  1213. #ifdef HAVE_SYS_SOCKET_H
  1214. #include <sys/socket.h>
  1215. #endif
  1216. #ifdef HAVE_LIMITS_H
  1217. #include <limits.h>
  1218. #endif
  1219. #ifdef HAVE_LINUX_TYPES_H
  1220. #include <linux/types.h>
  1221. #endif
  1222. #ifdef HAVE_NETINET_IN6_H
  1223. #include <netinet/in6.h>
  1224. #endif
  1225. #ifdef HAVE_NETINET_IN_H
  1226. #include <netinet/in.h>
  1227. #endif
  1228. #ifdef HAVE_LINUX_IF_H
  1229. #include <linux/if.h>
  1230. #endif])
  1231. transparent_ok=0
  1232. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1233. transparent_ok=1
  1234. fi
  1235. if test "x$linux_netfilter_ipv4" = "x1"; then
  1236. transparent_ok=1
  1237. fi
  1238. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1239. transparent_ok=1
  1240. fi
  1241. if test "x$transparent_ok" = "x1"; then
  1242. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1243. else
  1244. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1245. fi
  1246. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1247. [#ifdef HAVE_SYS_TYPES_H
  1248. #include <sys/types.h>
  1249. #endif
  1250. #ifdef HAVE_SYS_TIME_H
  1251. #include <sys/time.h>
  1252. #endif])
  1253. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1254. dnl Watch out.
  1255. AC_CHECK_SIZEOF(int8_t)
  1256. AC_CHECK_SIZEOF(int16_t)
  1257. AC_CHECK_SIZEOF(int32_t)
  1258. AC_CHECK_SIZEOF(int64_t)
  1259. AC_CHECK_SIZEOF(uint8_t)
  1260. AC_CHECK_SIZEOF(uint16_t)
  1261. AC_CHECK_SIZEOF(uint32_t)
  1262. AC_CHECK_SIZEOF(uint64_t)
  1263. AC_CHECK_SIZEOF(intptr_t)
  1264. AC_CHECK_SIZEOF(uintptr_t)
  1265. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1266. AC_CHECK_SIZEOF(char)
  1267. AC_CHECK_SIZEOF(short)
  1268. AC_CHECK_SIZEOF(int)
  1269. AC_CHECK_SIZEOF(long)
  1270. AC_CHECK_SIZEOF(long long)
  1271. AC_CHECK_SIZEOF(__int64)
  1272. AC_CHECK_SIZEOF(void *)
  1273. AC_CHECK_SIZEOF(time_t)
  1274. AC_CHECK_SIZEOF(size_t)
  1275. AC_CHECK_SIZEOF(pid_t)
  1276. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1277. AC_PC_FROM_UCONTEXT([:])
  1278. dnl used to include sockaddr_storage, but everybody has that.
  1279. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1280. [#ifdef HAVE_SYS_TYPES_H
  1281. #include <sys/types.h>
  1282. #endif
  1283. #ifdef HAVE_NETINET_IN_H
  1284. #include <netinet/in.h>
  1285. #endif
  1286. #ifdef HAVE_NETINET_IN6_H
  1287. #include <netinet/in6.h>
  1288. #endif
  1289. #ifdef HAVE_SYS_SOCKET_H
  1290. #include <sys/socket.h>
  1291. #endif
  1292. #ifdef _WIN32
  1293. #define _WIN32_WINNT 0x0501
  1294. #define WIN32_LEAN_AND_MEAN
  1295. #include <winsock2.h>
  1296. #include <ws2tcpip.h>
  1297. #endif
  1298. ])
  1299. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1300. [#ifdef HAVE_SYS_TYPES_H
  1301. #include <sys/types.h>
  1302. #endif
  1303. #ifdef HAVE_NETINET_IN_H
  1304. #include <netinet/in.h>
  1305. #endif
  1306. #ifdef HAVE_NETINET_IN6_H
  1307. #include <netinet/in6.h>
  1308. #endif
  1309. #ifdef HAVE_SYS_SOCKET_H
  1310. #include <sys/socket.h>
  1311. #endif
  1312. #ifdef _WIN32
  1313. #define _WIN32_WINNT 0x0501
  1314. #define WIN32_LEAN_AND_MEAN
  1315. #include <winsock2.h>
  1316. #include <ws2tcpip.h>
  1317. #endif
  1318. ])
  1319. AC_CHECK_TYPES([rlim_t], , ,
  1320. [#ifdef HAVE_SYS_TYPES_H
  1321. #include <sys/types.h>
  1322. #endif
  1323. #ifdef HAVE_SYS_TIME_H
  1324. #include <sys/time.h>
  1325. #endif
  1326. #ifdef HAVE_SYS_RESOURCE_H
  1327. #include <sys/resource.h>
  1328. #endif
  1329. ])
  1330. AX_CHECK_SIGN([time_t],
  1331. [ : ],
  1332. [ : ], [
  1333. #ifdef HAVE_SYS_TYPES_H
  1334. #include <sys/types.h>
  1335. #endif
  1336. #ifdef HAVE_SYS_TIME_H
  1337. #include <sys/time.h>
  1338. #endif
  1339. #ifdef HAVE_TIME_H
  1340. #include <time.h>
  1341. #endif
  1342. ])
  1343. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1344. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1345. fi
  1346. AX_CHECK_SIGN([size_t],
  1347. [ tor_cv_size_t_signed=yes ],
  1348. [ tor_cv_size_t_signed=no ], [
  1349. #ifdef HAVE_SYS_TYPES_H
  1350. #include <sys/types.h>
  1351. #endif
  1352. ])
  1353. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1354. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1355. fi
  1356. AX_CHECK_SIGN([enum always],
  1357. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1358. [ : ], [
  1359. enum always { AAA, BBB, CCC };
  1360. ])
  1361. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1362. #ifdef HAVE_SYS_SOCKET_H
  1363. #include <sys/socket.h>
  1364. #endif
  1365. ])
  1366. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1367. AC_CHECK_SIZEOF(cell_t)
  1368. # Now make sure that NULL can be represented as zero bytes.
  1369. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1370. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1371. [[#include <stdlib.h>
  1372. #include <string.h>
  1373. #include <stdio.h>
  1374. #ifdef HAVE_STDDEF_H
  1375. #include <stddef.h>
  1376. #endif
  1377. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1378. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1379. [tor_cv_null_is_zero=yes],
  1380. [tor_cv_null_is_zero=no],
  1381. [tor_cv_null_is_zero=cross])])
  1382. if test "$tor_cv_null_is_zero" = "cross"; then
  1383. # Cross-compiling; let's hope that the target isn't raving mad.
  1384. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1385. fi
  1386. if test "$tor_cv_null_is_zero" != "no"; then
  1387. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1388. [Define to 1 iff memset(0) sets pointers to NULL])
  1389. fi
  1390. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1391. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1392. [[#include <stdlib.h>
  1393. #include <string.h>
  1394. #include <stdio.h>
  1395. #ifdef HAVE_STDDEF_H
  1396. #include <stddef.h>
  1397. #endif
  1398. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1399. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1400. [tor_cv_dbl0_is_zero=yes],
  1401. [tor_cv_dbl0_is_zero=no],
  1402. [tor_cv_dbl0_is_zero=cross])])
  1403. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1404. # Cross-compiling; let's hope that the target isn't raving mad.
  1405. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1406. fi
  1407. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1408. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1409. [Define to 1 iff memset(0) sets doubles to 0.0])
  1410. fi
  1411. # And what happens when we malloc zero?
  1412. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1413. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1414. [[#include <stdlib.h>
  1415. #include <string.h>
  1416. #include <stdio.h>
  1417. #ifdef HAVE_STDDEF_H
  1418. #include <stddef.h>
  1419. #endif
  1420. int main () { return malloc(0)?0:1; }]])],
  1421. [tor_cv_malloc_zero_works=yes],
  1422. [tor_cv_malloc_zero_works=no],
  1423. [tor_cv_malloc_zero_works=cross])])
  1424. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1425. # Cross-compiling; let's hope that the target isn't raving mad.
  1426. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1427. fi
  1428. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1429. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1430. [Define to 1 iff malloc(0) returns a pointer])
  1431. fi
  1432. # whether we seem to be in a 2s-complement world.
  1433. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1434. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1435. [[int main () { int problem = ((-99) != (~99)+1);
  1436. return problem ? 1 : 0; }]])],
  1437. [tor_cv_twos_complement=yes],
  1438. [tor_cv_twos_complement=no],
  1439. [tor_cv_twos_complement=cross])])
  1440. if test "$tor_cv_twos_complement" = "cross"; then
  1441. # Cross-compiling; let's hope that the target isn't raving mad.
  1442. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1443. fi
  1444. if test "$tor_cv_twos_complement" != "no"; then
  1445. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1446. [Define to 1 iff we represent negative integers with
  1447. two's complement])
  1448. fi
  1449. # What does shifting a negative value do?
  1450. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1451. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1452. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1453. [tor_cv_sign_extend=yes],
  1454. [tor_cv_sign_extend=no],
  1455. [tor_cv_sign_extend=cross])])
  1456. if test "$tor_cv_sign_extend" = "cross"; then
  1457. # Cross-compiling; let's hope that the target isn't raving mad.
  1458. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1459. fi
  1460. if test "$tor_cv_sign_extend" != "no"; then
  1461. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1462. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1463. fi
  1464. # Is uint8_t the same type as unsigned char?
  1465. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1466. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1467. #include <stdint.h>
  1468. extern uint8_t c;
  1469. unsigned char c;]])],
  1470. [tor_cv_uint8_uchar=yes],
  1471. [tor_cv_uint8_uchar=no],
  1472. [tor_cv_uint8_uchar=cross])])
  1473. if test "$tor_cv_uint8_uchar" = "cross"; then
  1474. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1475. fi
  1476. if test "$tor_cv_uint8_uchar" = "no"; then
  1477. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1478. fi
  1479. # Whether we should use the dmalloc memory allocation debugging library.
  1480. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1481. AC_ARG_WITH(dmalloc,
  1482. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1483. [if [[ "$withval" = "yes" ]]; then
  1484. dmalloc=1
  1485. AC_MSG_RESULT(yes)
  1486. else
  1487. dmalloc=1
  1488. AC_MSG_RESULT(no)
  1489. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1490. )
  1491. if [[ $dmalloc -eq 1 ]]; then
  1492. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1493. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1494. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1495. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1496. fi
  1497. AC_ARG_WITH(tcmalloc,
  1498. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1499. [ tcmalloc=yes ], [ tcmalloc=no ])
  1500. if test "x$tcmalloc" = "xyes"; then
  1501. LDFLAGS="-ltcmalloc $LDFLAGS"
  1502. fi
  1503. using_custom_malloc=no
  1504. if test "x$enable_openbsd_malloc" = "xyes"; then
  1505. using_custom_malloc=yes
  1506. fi
  1507. if test "x$tcmalloc" = "xyes"; then
  1508. using_custom_malloc=yes
  1509. fi
  1510. if test "$using_custom_malloc" = "no"; then
  1511. AC_CHECK_FUNCS(mallinfo)
  1512. fi
  1513. # By default, we're going to assume we don't have mlockall()
  1514. # bionic and other platforms have various broken mlockall subsystems.
  1515. # Some systems don't have a working mlockall, some aren't linkable,
  1516. # and some have it but don't declare it.
  1517. AC_CHECK_FUNCS(mlockall)
  1518. AC_CHECK_DECLS([mlockall], , , [
  1519. #ifdef HAVE_SYS_MMAN_H
  1520. #include <sys/mman.h>
  1521. #endif])
  1522. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1523. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1524. # using macros
  1525. AC_CHECK_DECLS([getpagesize], , , [
  1526. #ifdef HAVE_UNISTD_H
  1527. #include <unistd.h>
  1528. #endif])
  1529. # Allow user to specify an alternate syslog facility
  1530. AC_ARG_WITH(syslog-facility,
  1531. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1532. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1533. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1534. AC_SUBST(LOGFACILITY)
  1535. # Check if we have getresuid and getresgid
  1536. AC_CHECK_FUNCS(getresuid getresgid)
  1537. # Check for gethostbyname_r in all its glorious incompatible versions.
  1538. # (This logic is based on that in Python's configure.in)
  1539. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1540. [Define this if you have any gethostbyname_r()])
  1541. AC_CHECK_FUNC(gethostbyname_r, [
  1542. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1543. OLD_CFLAGS=$CFLAGS
  1544. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1545. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1546. #include <netdb.h>
  1547. ]], [[
  1548. char *cp1, *cp2;
  1549. struct hostent *h1, *h2;
  1550. int i1, i2;
  1551. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1552. ]])],[
  1553. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1554. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1555. [Define this if gethostbyname_r takes 6 arguments])
  1556. AC_MSG_RESULT(6)
  1557. ], [
  1558. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1559. #include <netdb.h>
  1560. ]], [[
  1561. char *cp1, *cp2;
  1562. struct hostent *h1;
  1563. int i1, i2;
  1564. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1565. ]])], [
  1566. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1567. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1568. [Define this if gethostbyname_r takes 5 arguments])
  1569. AC_MSG_RESULT(5)
  1570. ], [
  1571. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1572. #include <netdb.h>
  1573. ]], [[
  1574. char *cp1;
  1575. struct hostent *h1;
  1576. struct hostent_data hd;
  1577. (void) gethostbyname_r(cp1,h1,&hd);
  1578. ]])], [
  1579. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1580. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1581. [Define this if gethostbyname_r takes 3 arguments])
  1582. AC_MSG_RESULT(3)
  1583. ], [
  1584. AC_MSG_RESULT(0)
  1585. ])
  1586. ])
  1587. ])
  1588. CFLAGS=$OLD_CFLAGS
  1589. ])
  1590. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1591. tor_cv_have_func_macro,
  1592. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1593. #include <stdio.h>
  1594. int main(int c, char **v) { puts(__func__); }])],
  1595. tor_cv_have_func_macro=yes,
  1596. tor_cv_have_func_macro=no))
  1597. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1598. tor_cv_have_FUNC_macro,
  1599. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1600. #include <stdio.h>
  1601. int main(int c, char **v) { puts(__FUNC__); }])],
  1602. tor_cv_have_FUNC_macro=yes,
  1603. tor_cv_have_FUNC_macro=no))
  1604. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1605. tor_cv_have_FUNCTION_macro,
  1606. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1607. #include <stdio.h>
  1608. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1609. tor_cv_have_FUNCTION_macro=yes,
  1610. tor_cv_have_FUNCTION_macro=no))
  1611. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1612. tor_cv_have_environ_declared,
  1613. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1614. #ifdef HAVE_UNISTD_H
  1615. #include <unistd.h>
  1616. #endif
  1617. #include <stdlib.h>
  1618. int main(int c, char **v) { char **t = environ; }])],
  1619. tor_cv_have_environ_declared=yes,
  1620. tor_cv_have_environ_declared=no))
  1621. if test "$tor_cv_have_func_macro" = "yes"; then
  1622. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1623. fi
  1624. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1625. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1626. fi
  1627. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1628. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1629. [Defined if the compiler supports __FUNCTION__])
  1630. fi
  1631. if test "$tor_cv_have_environ_declared" = "yes"; then
  1632. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1633. [Defined if we have extern char **environ already declared])
  1634. fi
  1635. # $prefix stores the value of the --prefix command line option, or
  1636. # NONE if the option wasn't set. In the case that it wasn't set, make
  1637. # it be the default, so that we can use it to expand directories now.
  1638. if test "x$prefix" = "xNONE"; then
  1639. prefix=$ac_default_prefix
  1640. fi
  1641. # and similarly for $exec_prefix
  1642. if test "x$exec_prefix" = "xNONE"; then
  1643. exec_prefix=$prefix
  1644. fi
  1645. if test "x$BUILDDIR" = "x"; then
  1646. BUILDDIR=`pwd`
  1647. fi
  1648. AC_SUBST(BUILDDIR)
  1649. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1650. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1651. if test "x$CONFDIR" = "x"; then
  1652. CONFDIR=`eval echo $sysconfdir/tor`
  1653. fi
  1654. AC_SUBST(CONFDIR)
  1655. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1656. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1657. BINDIR=`eval echo $bindir`
  1658. AC_SUBST(BINDIR)
  1659. LOCALSTATEDIR=`eval echo $localstatedir`
  1660. AC_SUBST(LOCALSTATEDIR)
  1661. if test "$bwin32" = "true"; then
  1662. # Test if the linker supports the --nxcompat and --dynamicbase options
  1663. # for Windows
  1664. save_LDFLAGS="$LDFLAGS"
  1665. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1666. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1667. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1668. [AC_MSG_RESULT([yes])]
  1669. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1670. [AC_MSG_RESULT([no])]
  1671. )
  1672. LDFLAGS="$save_LDFLAGS"
  1673. fi
  1674. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1675. # than autoconf's macros like.
  1676. if test "$GCC" = "yes"; then
  1677. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1678. # accident waiting to happen.
  1679. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1680. else
  1681. # Override optimization level for non-gcc compilers
  1682. CFLAGS="$CFLAGS -O"
  1683. enable_gcc_warnings=no
  1684. enable_gcc_warnings_advisory=no
  1685. fi
  1686. # Warnings implies advisory-warnings and -Werror.
  1687. if test "$enable_gcc_warnings" = "yes"; then
  1688. enable_gcc_warnings_advisory=yes
  1689. enable_fatal_warnings=yes
  1690. fi
  1691. # OS X Lion started deprecating the system openssl. Let's just disable
  1692. # all deprecation warnings on OS X. Also, to potentially make the binary
  1693. # a little smaller, let's enable dead_strip.
  1694. case "$host_os" in
  1695. darwin*)
  1696. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1697. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1698. esac
  1699. # Add some more warnings which we use in development but not in the
  1700. # released versions. (Some relevant gcc versions can't handle these.)
  1701. #
  1702. # Note that we have to do this near the end of the autoconf process, or
  1703. # else we may run into problems when these warnings hit on the testing C
  1704. # programs that autoconf wants to build.
  1705. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1706. case "$host" in
  1707. *-*-openbsd* | *-*-bitrig*)
  1708. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1709. # That's fine, except that the headers don't pass -Wredundant-decls.
  1710. # Therefore, let's disable -Wsystem-headers when we're building
  1711. # with maximal warnings on OpenBSD.
  1712. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1713. esac
  1714. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1715. # have it work better.
  1716. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1717. # This warning was added in gcc 4.3, but it appears to generate
  1718. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1719. #CFLAGS="$CFLAGS -Wlogical-op"
  1720. m4_foreach_w([warning_flag], [
  1721. -Waddress
  1722. -Waddress-of-array-temporary
  1723. -Waddress-of-temporary
  1724. -Wambiguous-macro
  1725. -Wanonymous-pack-parens
  1726. -Warc
  1727. -Warc-abi
  1728. -Warc-bridge-casts-disallowed-in-nonarc
  1729. -Warc-maybe-repeated-use-of-weak
  1730. -Warc-performSelector-leaks
  1731. -Warc-repeated-use-of-weak
  1732. -Warray-bounds
  1733. -Warray-bounds-pointer-arithmetic
  1734. -Wasm
  1735. -Wasm-operand-widths
  1736. -Watomic-properties
  1737. -Watomic-property-with-user-defined-accessor
  1738. -Wauto-import
  1739. -Wauto-storage-class
  1740. -Wauto-var-id
  1741. -Wavailability
  1742. -Wbackslash-newline-escape
  1743. -Wbad-array-new-length
  1744. -Wbind-to-temporary-copy
  1745. -Wbitfield-constant-conversion
  1746. -Wbool-conversion
  1747. -Wbool-conversions
  1748. -Wbuiltin-requires-header
  1749. -Wchar-align
  1750. -Wcompare-distinct-pointer-types
  1751. -Wcomplex-component-init
  1752. -Wconditional-type-mismatch
  1753. -Wconfig-macros
  1754. -Wconstant-conversion
  1755. -Wconstant-logical-operand
  1756. -Wconstexpr-not-const
  1757. -Wcustom-atomic-properties
  1758. -Wdangling-field
  1759. -Wdangling-initializer-list
  1760. -Wdate-time
  1761. -Wdelegating-ctor-cycles
  1762. -Wdeprecated-implementations
  1763. -Wdeprecated-register
  1764. -Wdirect-ivar-access
  1765. -Wdiscard-qual
  1766. -Wdistributed-object-modifiers
  1767. -Wdivision-by-zero
  1768. -Wdollar-in-identifier-extension
  1769. -Wdouble-promotion
  1770. -Wduplicate-decl-specifier
  1771. -Wduplicate-enum
  1772. -Wduplicate-method-arg
  1773. -Wduplicate-method-match
  1774. -Wduplicated-cond
  1775. -Wdynamic-class-memaccess
  1776. -Wembedded-directive
  1777. -Wempty-translation-unit
  1778. -Wenum-conversion
  1779. -Wexit-time-destructors
  1780. -Wexplicit-ownership-type
  1781. -Wextern-initializer
  1782. -Wextra
  1783. -Wextra-semi
  1784. -Wextra-tokens
  1785. -Wflexible-array-extensions
  1786. -Wfloat-conversion
  1787. -Wformat-non-iso
  1788. -Wfour-char-constants
  1789. -Wgcc-compat
  1790. -Wglobal-constructors
  1791. -Wgnu-array-member-paren-init
  1792. -Wgnu-designator
  1793. -Wgnu-static-float-init
  1794. -Wheader-guard
  1795. -Wheader-hygiene
  1796. -Widiomatic-parentheses
  1797. -Wignored-attributes
  1798. -Wimplicit-atomic-properties
  1799. -Wimplicit-conversion-floating-point-to-bool
  1800. -Wimplicit-exception-spec-mismatch
  1801. -Wimplicit-fallthrough
  1802. -Wimplicit-fallthrough-per-function
  1803. -Wimplicit-retain-self
  1804. -Wimport-preprocessor-directive-pedantic
  1805. -Wincompatible-library-redeclaration
  1806. -Wincompatible-pointer-types-discards-qualifiers
  1807. -Wincomplete-implementation
  1808. -Wincomplete-module
  1809. -Wincomplete-umbrella
  1810. -Winit-self
  1811. -Wint-conversions
  1812. -Wint-to-void-pointer-cast
  1813. -Winteger-overflow
  1814. -Winvalid-constexpr
  1815. -Winvalid-iboutlet
  1816. -Winvalid-noreturn
  1817. -Winvalid-pp-token
  1818. -Winvalid-source-encoding
  1819. -Winvalid-token-paste
  1820. -Wknr-promoted-parameter
  1821. -Wlarge-by-value-copy
  1822. -Wliteral-conversion
  1823. -Wliteral-range
  1824. -Wlocal-type-template-args
  1825. -Wlogical-op
  1826. -Wloop-analysis
  1827. -Wmain-return-type
  1828. -Wmalformed-warning-check
  1829. -Wmethod-signatures
  1830. -Wmicrosoft
  1831. -Wmicrosoft-exists
  1832. -Wmismatched-parameter-types
  1833. -Wmismatched-return-types
  1834. -Wmissing-field-initializers
  1835. -Wmissing-format-attribute
  1836. -Wmissing-noreturn
  1837. -Wmissing-selector-name
  1838. -Wmissing-sysroot
  1839. -Wmissing-variable-declarations
  1840. -Wmodule-conflict
  1841. -Wnested-anon-types
  1842. -Wnewline-eof
  1843. -Wnon-literal-null-conversion
  1844. -Wnon-pod-varargs
  1845. -Wnonportable-cfstrings
  1846. -Wnormalized=nfkc
  1847. -Wnull-arithmetic
  1848. -Wnull-character
  1849. -Wnull-conversion
  1850. -Wnull-dereference
  1851. -Wout-of-line-declaration
  1852. -Wover-aligned
  1853. -Woverlength-strings
  1854. -Woverride-init
  1855. -Woverriding-method-mismatch
  1856. -Wpointer-type-mismatch
  1857. -Wpredefined-identifier-outside-function
  1858. -Wprotocol-property-synthesis-ambiguity
  1859. -Wreadonly-iboutlet-property
  1860. -Wreadonly-setter-attrs
  1861. -Wreceiver-expr
  1862. -Wreceiver-forward-class
  1863. -Wreceiver-is-weak
  1864. -Wreinterpret-base-class
  1865. -Wrequires-super-attribute
  1866. -Wreserved-user-defined-literal
  1867. -Wreturn-stack-address
  1868. -Wsection
  1869. -Wselector-type-mismatch
  1870. -Wsentinel
  1871. -Wserialized-diagnostics
  1872. -Wshadow
  1873. -Wshift-count-negative
  1874. -Wshift-count-overflow
  1875. -Wshift-negative-value
  1876. -Wshift-overflow=2
  1877. -Wshift-sign-overflow
  1878. -Wshorten-64-to-32
  1879. -Wsizeof-array-argument
  1880. -Wsource-uses-openmp
  1881. -Wstatic-float-init
  1882. -Wstatic-in-inline
  1883. -Wstatic-local-in-inline
  1884. -Wstrict-overflow=1
  1885. -Wstring-compare
  1886. -Wstring-conversion
  1887. -Wstrlcpy-strlcat-size
  1888. -Wstrncat-size
  1889. -Wsuggest-attribute=format
  1890. -Wsuggest-attribute=noreturn
  1891. -Wsuper-class-method-mismatch
  1892. -Wswitch-bool
  1893. -Wsync-nand
  1894. -Wtautological-constant-out-of-range-compare
  1895. -Wtentative-definition-incomplete-type
  1896. -Wtrampolines
  1897. -Wtype-safety
  1898. -Wtypedef-redefinition
  1899. -Wtypename-missing
  1900. -Wundefined-inline
  1901. -Wundefined-internal
  1902. -Wundefined-reinterpret-cast
  1903. -Wunicode
  1904. -Wunicode-whitespace
  1905. -Wunknown-warning-option
  1906. -Wunnamed-type-template-args
  1907. -Wunneeded-member-function
  1908. -Wunsequenced
  1909. -Wunsupported-visibility
  1910. -Wunused-but-set-parameter
  1911. -Wunused-but-set-variable
  1912. -Wunused-command-line-argument
  1913. -Wunused-const-variable=2
  1914. -Wunused-exception-parameter
  1915. -Wunused-local-typedefs
  1916. -Wunused-member-function
  1917. -Wunused-sanitize-argument
  1918. -Wunused-volatile-lvalue
  1919. -Wuser-defined-literals
  1920. -Wvariadic-macros
  1921. -Wvector-conversion
  1922. -Wvector-conversions
  1923. -Wvexing-parse
  1924. -Wvisibility
  1925. -Wvla-extension
  1926. -Wzero-length-array
  1927. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1928. dnl We should re-enable this in some later version. Clang doesn't
  1929. dnl mind, but it causes trouble with GCC.
  1930. dnl -Wstrict-overflow=2
  1931. dnl These seem to require annotations that we don't currently use,
  1932. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1933. dnl -Wthread-safety
  1934. dnl -Wthread-safety-analysis
  1935. dnl -Wthread-safety-attributes
  1936. dnl -Wthread-safety-beta
  1937. dnl -Wthread-safety-precise
  1938. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1939. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1940. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1941. CFLAGS="$CFLAGS -Wwrite-strings"
  1942. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1943. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1944. CFLAGS="$CFLAGS -Wunused-parameter "
  1945. # These interfere with building main() { return 0; }, which autoconf
  1946. # likes to use as its default program.
  1947. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1948. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1949. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1950. fi
  1951. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1952. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1953. fi
  1954. if test "$tor_cv_cflags__warn_unused_const_variable_2" = "yes"; then
  1955. AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
  1956. fi
  1957. if test "x$enable_fatal_warnings" = "xyes"; then
  1958. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1959. # default autoconf programs are full of errors.
  1960. CFLAGS="$CFLAGS -Werror"
  1961. fi
  1962. fi
  1963. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1964. case "$host_os" in
  1965. darwin*)
  1966. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1967. esac
  1968. fi
  1969. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1970. AC_CONFIG_FILES([
  1971. Doxyfile
  1972. Makefile
  1973. contrib/dist/suse/tor.sh
  1974. contrib/operator-tools/tor.logrotate
  1975. contrib/dist/tor.sh
  1976. contrib/dist/torctl
  1977. contrib/dist/tor.service
  1978. src/config/torrc.sample
  1979. src/config/torrc.minimal
  1980. src/rust/.cargo/config
  1981. scripts/maint/checkOptionDocs.pl
  1982. scripts/maint/updateVersions.pl
  1983. ])
  1984. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1985. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1986. for file in $regular_mans ; do
  1987. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1988. echo "==================================";
  1989. echo;
  1990. echo "Building Tor has failed since manpages cannot be built.";
  1991. echo;
  1992. echo "You need asciidoc installed to be able to build the manpages.";
  1993. echo "To build without manpages, use the --disable-asciidoc argument";
  1994. echo "when calling configure.";
  1995. echo;
  1996. echo "==================================";
  1997. exit 1;
  1998. fi
  1999. done
  2000. fi
  2001. if test "$fragile_hardening" = "yes"; then
  2002. AC_MSG_WARN([
  2003. ============
  2004. Warning! Building Tor with --enable-fragile-hardening (also known as
  2005. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  2006. other kinds of attacks easier. A Tor instance build with this option will be
  2007. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  2008. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  2009. denial of service attacks. For more information, see
  2010. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  2011. ============
  2012. ])
  2013. fi
  2014. AC_OUTPUT