configure.ac 70 KB

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  1. dnl Copyright (c) 2001-2004, Roger Dingledine
  2. dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
  3. dnl Copyright (c) 2007-2017, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_PREREQ([2.63])
  6. AC_INIT([tor],[0.3.3.8])
  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. mach_approximate_time \
  475. memmem \
  476. memset_s \
  477. pipe \
  478. pipe2 \
  479. prctl \
  480. readpassphrase \
  481. rint \
  482. sigaction \
  483. socketpair \
  484. statvfs \
  485. strlcat \
  486. strlcpy \
  487. strnlen \
  488. strptime \
  489. strtok_r \
  490. strtoull \
  491. sysconf \
  492. sysctl \
  493. truncate \
  494. uname \
  495. usleep \
  496. vasprintf \
  497. _vscprintf
  498. )
  499. # Apple messed up when they added two functions functions in Sierra: they
  500. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  501. # checks. So we should only probe for those functions if we are sure that we
  502. # are not targeting OSX 10.11 or earlier.
  503. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  504. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  505. #ifdef __APPLE__
  506. # include <AvailabilityMacros.h>
  507. # ifndef MAC_OS_X_VERSION_10_12
  508. # define MAC_OS_X_VERSION_10_12 101200
  509. # endif
  510. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  511. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  512. # error "Running on Mac OSX 10.11 or earlier"
  513. # endif
  514. # endif
  515. #endif
  516. ]], [[]])],
  517. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  518. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  519. if test "$on_macos_pre_10_12" = "no"; then
  520. AC_CHECK_FUNCS(
  521. clock_gettime \
  522. getentropy \
  523. )
  524. fi
  525. if test "$bwin32" != "true"; then
  526. AC_CHECK_HEADERS(pthread.h)
  527. AC_CHECK_FUNCS(pthread_create)
  528. AC_CHECK_FUNCS(pthread_condattr_setclock)
  529. fi
  530. if test "$bwin32" = "true"; then
  531. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  532. #include <windows.h>
  533. #include <conio.h>
  534. #include <wchar.h>
  535. ])
  536. fi
  537. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  538. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  539. dnl ------------------------------------------------------
  540. dnl Where do you live, libevent? And how do we call you?
  541. if test "$bwin32" = "true"; then
  542. TOR_LIB_WS32=-lws2_32
  543. TOR_LIB_IPHLPAPI=-liphlpapi
  544. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  545. # think it's actually necessary.
  546. TOR_LIB_GDI=-lgdi32
  547. TOR_LIB_USERENV=-luserenv
  548. else
  549. TOR_LIB_WS32=
  550. TOR_LIB_GDI=
  551. TOR_LIB_USERENV=
  552. fi
  553. AC_SUBST(TOR_LIB_WS32)
  554. AC_SUBST(TOR_LIB_GDI)
  555. AC_SUBST(TOR_LIB_IPHLPAPI)
  556. AC_SUBST(TOR_LIB_USERENV)
  557. tor_libevent_pkg_redhat="libevent"
  558. tor_libevent_pkg_debian="libevent-dev"
  559. tor_libevent_devpkg_redhat="libevent-devel"
  560. tor_libevent_devpkg_debian="libevent-dev"
  561. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  562. dnl linking for static builds.
  563. STATIC_LIBEVENT_FLAGS=""
  564. if test "$enable_static_libevent" = "yes"; then
  565. if test "$have_rt" = "yes"; then
  566. STATIC_LIBEVENT_FLAGS=" -lrt "
  567. fi
  568. fi
  569. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  570. #ifdef _WIN32
  571. #include <winsock2.h>
  572. #endif
  573. #include <sys/time.h>
  574. #include <sys/types.h>
  575. #include <event2/event.h>], [
  576. #ifdef _WIN32
  577. #include <winsock2.h>
  578. #endif
  579. struct event_base;
  580. struct event_base *event_base_new(void);
  581. void event_base_free(struct event_base *);],
  582. [
  583. #ifdef _WIN32
  584. {WSADATA d; WSAStartup(0x101,&d); }
  585. #endif
  586. event_base_free(event_base_new());
  587. ], [--with-libevent-dir], [/opt/libevent])
  588. dnl Determine the incantation needed to link libevent.
  589. save_LIBS="$LIBS"
  590. save_LDFLAGS="$LDFLAGS"
  591. save_CPPFLAGS="$CPPFLAGS"
  592. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  593. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  594. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  595. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  596. if test "$enable_static_libevent" = "yes"; then
  597. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  598. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  599. else
  600. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  601. fi
  602. else
  603. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  604. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  605. 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"))
  606. if test "$ac_cv_search_event_new" != "none required"; then
  607. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  608. fi
  609. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  610. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  611. fi
  612. else
  613. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  614. fi
  615. fi
  616. dnl Now check for particular libevent functions.
  617. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  618. evutil_secure_rng_add_bytes \
  619. ])
  620. LIBS="$save_LIBS"
  621. LDFLAGS="$save_LDFLAGS"
  622. CPPFLAGS="$save_CPPFLAGS"
  623. dnl Check that libevent is at least at version 2.0.10, the first stable
  624. dnl release of its series
  625. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  626. AC_MSG_CHECKING([whether Libevent is new enough])
  627. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  628. #include <event2/event.h>
  629. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  630. #error
  631. int x = y(zz);
  632. #else
  633. int x = 1;
  634. #endif
  635. ])], [ AC_MSG_RESULT([yes]) ],
  636. [ AC_MSG_RESULT([no])
  637. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  638. LIBS="$save_LIBS"
  639. LDFLAGS="$save_LDFLAGS"
  640. CPPFLAGS="$save_CPPFLAGS"
  641. AC_SUBST(TOR_LIBEVENT_LIBS)
  642. dnl ------------------------------------------------------
  643. dnl Where do you live, libm?
  644. dnl On some platforms (Haiku/BeOS) the math library is
  645. dnl part of libroot. In which case don't link against lm
  646. TOR_LIB_MATH=""
  647. save_LIBS="$LIBS"
  648. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  649. if test "$ac_cv_search_pow" != "none required"; then
  650. TOR_LIB_MATH="$ac_cv_search_pow"
  651. fi
  652. LIBS="$save_LIBS"
  653. AC_SUBST(TOR_LIB_MATH)
  654. dnl ------------------------------------------------------
  655. dnl Where do you live, openssl? And how do we call you?
  656. tor_openssl_pkg_redhat="openssl"
  657. tor_openssl_pkg_debian="libssl-dev"
  658. tor_openssl_devpkg_redhat="openssl-devel"
  659. tor_openssl_devpkg_debian="libssl-dev"
  660. ALT_openssl_WITHVAL=""
  661. AC_ARG_WITH(ssl-dir,
  662. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  663. [
  664. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  665. ALT_openssl_WITHVAL="$withval"
  666. fi
  667. ])
  668. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  669. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  670. [#include <openssl/ssl.h>],
  671. [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
  672. [TLSv1_1_method();], [],
  673. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  674. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  675. if test "$enable_static_openssl" = "yes"; then
  676. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  677. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  678. else
  679. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  680. fi
  681. else
  682. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  683. fi
  684. AC_SUBST(TOR_OPENSSL_LIBS)
  685. dnl Now check for particular openssl functions.
  686. save_LIBS="$LIBS"
  687. save_LDFLAGS="$LDFLAGS"
  688. save_CPPFLAGS="$CPPFLAGS"
  689. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  690. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  691. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  692. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  693. #include <openssl/opensslv.h>
  694. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  695. #error "too old"
  696. #endif
  697. ]], [[]])],
  698. [ : ],
  699. [ 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.]) ])
  700. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  701. #include <openssl/opensslv.h>
  702. #include <openssl/evp.h>
  703. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  704. #error "no ECC"
  705. #endif
  706. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  707. #error "curves unavailable"
  708. #endif
  709. ]], [[]])],
  710. [ : ],
  711. [ 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.]) ])
  712. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  713. [#include <openssl/ssl.h>
  714. ])
  715. AC_CHECK_FUNCS([ \
  716. SSL_SESSION_get_master_key \
  717. SSL_get_server_random \
  718. SSL_get_client_ciphers \
  719. SSL_get_client_random \
  720. SSL_CIPHER_find \
  721. TLS_method
  722. ])
  723. dnl Check if OpenSSL has scrypt implementation.
  724. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  725. dnl Check if OpenSSL structures are opaque
  726. AC_CHECK_MEMBERS([SSL.state], , ,
  727. [#include <openssl/ssl.h>
  728. ])
  729. dnl Define the set of checks for KIST scheduler support.
  730. AC_DEFUN([CHECK_KIST_SUPPORT],[
  731. dnl KIST needs struct tcp_info and for certain members to exist.
  732. AC_CHECK_MEMBERS(
  733. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  734. , ,[[#include <netinet/tcp.h>]])
  735. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  736. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  737. #include <linux/sockios.h>
  738. #ifndef SIOCOUTQNSD
  739. #error
  740. #endif
  741. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  742. if test "x$have_siocoutqnsd" = "xyes"; then
  743. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  744. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  745. have_kist_support=yes
  746. fi
  747. fi
  748. fi
  749. ])
  750. dnl Now, trigger the check.
  751. CHECK_KIST_SUPPORT
  752. AS_IF([test "x$have_kist_support" = "xyes"],
  753. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  754. on this system])],
  755. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  756. LIBS="$save_LIBS"
  757. LDFLAGS="$save_LDFLAGS"
  758. CPPFLAGS="$save_CPPFLAGS"
  759. dnl ------------------------------------------------------
  760. dnl Where do you live, zlib? And how do we call you?
  761. tor_zlib_pkg_redhat="zlib"
  762. tor_zlib_pkg_debian="zlib1g"
  763. tor_zlib_devpkg_redhat="zlib-devel"
  764. tor_zlib_devpkg_debian="zlib1g-dev"
  765. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  766. [#include <zlib.h>],
  767. [const char * zlibVersion(void);],
  768. [zlibVersion();], [--with-zlib-dir],
  769. [/opt/zlib])
  770. if test "$enable_static_zlib" = "yes"; then
  771. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  772. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  773. using --enable-static-zlib")
  774. else
  775. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  776. fi
  777. else
  778. TOR_ZLIB_LIBS="-lz"
  779. fi
  780. AC_SUBST(TOR_ZLIB_LIBS)
  781. dnl ------------------------------------------------------
  782. dnl Where we do we find lzma?
  783. AC_ARG_ENABLE(lzma,
  784. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  785. [case "${enableval}" in
  786. "yes") lzma=true ;;
  787. "no") lzma=false ;;
  788. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  789. esac], [lzma=auto])
  790. if test "x$enable_lzma" = "xno"; then
  791. have_lzma=no;
  792. else
  793. PKG_CHECK_MODULES([LZMA],
  794. [liblzma],
  795. have_lzma=yes,
  796. have_lzma=no)
  797. if test "x$have_lzma" = "xno" ; then
  798. AC_MSG_WARN([Unable to find liblzma.])
  799. fi
  800. fi
  801. if test "x$have_lzma" = "xyes"; then
  802. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  803. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  804. TOR_LZMA_LIBS="${LZMA_LIBS}"
  805. fi
  806. AC_SUBST(TOR_LZMA_CFLAGS)
  807. AC_SUBST(TOR_LZMA_LIBS)
  808. dnl ------------------------------------------------------
  809. dnl Where we do we find zstd?
  810. AC_ARG_ENABLE(zstd,
  811. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  812. [case "${enableval}" in
  813. "yes") zstd=true ;;
  814. "no") zstd=false ;;
  815. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  816. esac], [zstd=auto])
  817. if test "x$enable_zstd" = "xno"; then
  818. have_zstd=no;
  819. else
  820. PKG_CHECK_MODULES([ZSTD],
  821. [libzstd >= 1.1],
  822. have_zstd=yes,
  823. have_zstd=no)
  824. if test "x$have_zstd" = "xno" ; then
  825. AC_MSG_WARN([Unable to find libzstd.])
  826. fi
  827. fi
  828. if test "x$have_zstd" = "xyes"; then
  829. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  830. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  831. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  832. fi
  833. AC_SUBST(TOR_ZSTD_CFLAGS)
  834. AC_SUBST(TOR_ZSTD_LIBS)
  835. dnl ----------------------------------------------------------------------
  836. dnl Check if libcap is available for capabilities.
  837. tor_cap_pkg_debian="libcap2"
  838. tor_cap_pkg_redhat="libcap"
  839. tor_cap_devpkg_debian="libcap-dev"
  840. tor_cap_devpkg_redhat="libcap-devel"
  841. AC_CHECK_LIB([cap], [cap_init], [],
  842. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  843. )
  844. AC_CHECK_FUNCS(cap_set_proc)
  845. dnl ---------------------------------------------------------------------
  846. dnl Now that we know about our major libraries, we can check for compiler
  847. dnl and linker hardening options. We need to do this with the libraries known,
  848. dnl since sometimes the linker will like an option but not be willing to
  849. dnl use it with a build of a library.
  850. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  851. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  852. CFLAGS_FTRAPV=
  853. CFLAGS_FWRAPV=
  854. CFLAGS_ASAN=
  855. CFLAGS_UBSAN=
  856. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  857. #if !defined(__clang__)
  858. #error
  859. #endif])], have_clang=yes, have_clang=no)
  860. if test "x$enable_gcc_hardening" != "xno"; then
  861. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  862. if test "x$have_clang" = "xyes"; then
  863. TOR_CHECK_CFLAGS(-Qunused-arguments)
  864. fi
  865. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  866. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  867. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  868. m4_ifdef([AS_VAR_IF],[
  869. AS_VAR_IF(can_compile, [yes],
  870. AS_VAR_IF(can_link, [yes],
  871. [],
  872. 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.)]))
  873. )])
  874. AS_VAR_POPDEF([can_link])
  875. AS_VAR_POPDEF([can_compile])
  876. TOR_CHECK_CFLAGS(-Wstack-protector)
  877. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  878. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  879. TOR_CHECK_CFLAGS(-fPIE)
  880. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  881. fi
  882. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  883. fi
  884. if test "$fragile_hardening" = "yes"; then
  885. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  886. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  887. 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.])
  888. fi
  889. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  890. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  891. fi
  892. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  893. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  894. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  895. fi
  896. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  897. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  898. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  899. fi
  900. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  901. fi
  902. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  903. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  904. mulodi_fixes_ftrapv=no
  905. if test "$have_clang" = "yes"; then
  906. saved_CFLAGS="$CFLAGS"
  907. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  908. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  909. AC_LINK_IFELSE([
  910. AC_LANG_SOURCE([[
  911. #include <stdint.h>
  912. #include <stdlib.h>
  913. int main(int argc, char **argv)
  914. {
  915. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  916. * (int64_t)atoi(argv[3]);
  917. return x == 9;
  918. } ]])],
  919. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  920. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  921. if test "$ftrapv_can_link" = "no"; then
  922. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  923. AC_LINK_IFELSE([
  924. AC_LANG_SOURCE([[
  925. #include <stdint.h>
  926. #include <stdlib.h>
  927. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  928. *overflow=0;
  929. return a;
  930. }
  931. int main(int argc, char **argv)
  932. {
  933. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  934. * (int64_t)atoi(argv[3]);
  935. return x == 9;
  936. } ]])],
  937. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  938. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  939. fi
  940. CFLAGS="$saved_CFLAGS"
  941. fi
  942. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  943. dnl These cflags add bunches of branches, and we haven't been able to
  944. dnl persuade ourselves that they're suitable for code that needs to be
  945. dnl constant time.
  946. AC_SUBST(CFLAGS_BUGTRAP)
  947. dnl These cflags are variant ones sutable for code that needs to be
  948. dnl constant-time.
  949. AC_SUBST(CFLAGS_CONSTTIME)
  950. if test "x$enable_linker_hardening" != "xno"; then
  951. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  952. fi
  953. # For backtrace support
  954. TOR_CHECK_LDFLAGS(-rdynamic)
  955. dnl ------------------------------------------------------
  956. dnl Now see if we have a -fomit-frame-pointer compiler option.
  957. saved_CFLAGS="$CFLAGS"
  958. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  959. F_OMIT_FRAME_POINTER=''
  960. if test "$saved_CFLAGS" != "$CFLAGS"; then
  961. if test "$fragile_hardening" = "yes"; then
  962. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  963. fi
  964. fi
  965. CFLAGS="$saved_CFLAGS"
  966. AC_SUBST(F_OMIT_FRAME_POINTER)
  967. dnl ------------------------------------------------------
  968. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  969. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  970. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  971. dnl code will work.
  972. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  973. dnl ============================================================
  974. dnl Check for libseccomp
  975. if test "x$enable_seccomp" != "xno"; then
  976. AC_CHECK_HEADERS([seccomp.h])
  977. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  978. fi
  979. dnl ============================================================
  980. dnl Check for libscrypt
  981. if test "x$enable_libscrypt" != "xno"; then
  982. AC_CHECK_HEADERS([libscrypt.h])
  983. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  984. AC_CHECK_FUNCS([libscrypt_scrypt])
  985. fi
  986. dnl ============================================================
  987. dnl We need an implementation of curve25519.
  988. dnl set these defaults.
  989. build_curve25519_donna=no
  990. build_curve25519_donna_c64=no
  991. use_curve25519_donna=no
  992. use_curve25519_nacl=no
  993. CURVE25519_LIBS=
  994. dnl The best choice is using curve25519-donna-c64, but that requires
  995. dnl that we
  996. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  997. tor_cv_can_use_curve25519_donna_c64,
  998. [AC_RUN_IFELSE(
  999. [AC_LANG_PROGRAM([dnl
  1000. #include <stdint.h>
  1001. typedef unsigned uint128_t __attribute__((mode(TI)));
  1002. int func(uint64_t a, uint64_t b) {
  1003. uint128_t c = ((uint128_t)a) * b;
  1004. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1005. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1006. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1007. (((uint64_t)(c))&0xffffffffL) == 0;
  1008. return ok;
  1009. }
  1010. ], [dnl
  1011. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1012. ((uint64_t)1234567890) << 24);
  1013. return !ok;
  1014. ])],
  1015. [tor_cv_can_use_curve25519_donna_c64=yes],
  1016. [tor_cv_can_use_curve25519_donna_c64=no],
  1017. [AC_LINK_IFELSE(
  1018. [AC_LANG_PROGRAM([dnl
  1019. #include <stdint.h>
  1020. typedef unsigned uint128_t __attribute__((mode(TI)));
  1021. int func(uint64_t a, uint64_t b) {
  1022. uint128_t c = ((uint128_t)a) * b;
  1023. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1024. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1025. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1026. (((uint64_t)(c))&0xffffffffL) == 0;
  1027. return ok;
  1028. }
  1029. ], [dnl
  1030. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1031. ((uint64_t)1234567890) << 24);
  1032. return !ok;
  1033. ])],
  1034. [tor_cv_can_use_curve25519_donna_c64=cross],
  1035. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1036. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1037. nacl/crypto_scalarmult_curve25519.h])
  1038. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1039. tor_cv_can_use_curve25519_nacl,
  1040. [tor_saved_LIBS="$LIBS"
  1041. LIBS="$LIBS -lnacl"
  1042. AC_LINK_IFELSE(
  1043. [AC_LANG_PROGRAM([dnl
  1044. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1045. #include <crypto_scalarmult_curve25519.h>
  1046. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1047. #include <nacl/crypto_scalarmult_curve25519.h>
  1048. #endif
  1049. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1050. #error Hey, this is the reference implementation! That's not fast.
  1051. #endif
  1052. ], [
  1053. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1054. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1055. [tor_cv_can_use_curve25519_nacl=no])
  1056. LIBS="$tor_saved_LIBS" ])
  1057. dnl Okay, now we need to figure out which one to actually use. Fall back
  1058. dnl to curve25519-donna.c
  1059. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1060. build_curve25519_donna_c64=yes
  1061. use_curve25519_donna=yes
  1062. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1063. use_curve25519_nacl=yes
  1064. CURVE25519_LIBS=-lnacl
  1065. else
  1066. build_curve25519_donna=yes
  1067. use_curve25519_donna=yes
  1068. fi
  1069. if test "x$use_curve25519_donna" = "xyes"; then
  1070. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1071. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1072. fi
  1073. if test "x$use_curve25519_nacl" = "xyes"; then
  1074. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1075. [Defined if we should use a curve25519 from nacl])
  1076. fi
  1077. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1078. test "x$build_curve25519_donna" = "xyes")
  1079. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1080. test "x$build_curve25519_donna_c64" = "xyes")
  1081. AC_SUBST(CURVE25519_LIBS)
  1082. dnl Make sure to enable support for large off_t if available.
  1083. AC_SYS_LARGEFILE
  1084. AC_CHECK_HEADERS([assert.h \
  1085. errno.h \
  1086. fcntl.h \
  1087. signal.h \
  1088. string.h \
  1089. sys/capability.h \
  1090. sys/fcntl.h \
  1091. sys/stat.h \
  1092. sys/time.h \
  1093. sys/types.h \
  1094. time.h \
  1095. unistd.h \
  1096. arpa/inet.h \
  1097. crt_externs.h \
  1098. execinfo.h \
  1099. gnu/libc-version.h \
  1100. grp.h \
  1101. ifaddrs.h \
  1102. inttypes.h \
  1103. limits.h \
  1104. linux/types.h \
  1105. machine/limits.h \
  1106. malloc.h \
  1107. malloc/malloc.h \
  1108. malloc_np.h \
  1109. netdb.h \
  1110. netinet/in.h \
  1111. netinet/in6.h \
  1112. pwd.h \
  1113. readpassphrase.h \
  1114. stdint.h \
  1115. stdatomic.h \
  1116. sys/eventfd.h \
  1117. sys/file.h \
  1118. sys/ioctl.h \
  1119. sys/limits.h \
  1120. sys/mman.h \
  1121. sys/param.h \
  1122. sys/prctl.h \
  1123. sys/random.h \
  1124. sys/resource.h \
  1125. sys/select.h \
  1126. sys/socket.h \
  1127. sys/statvfs.h \
  1128. sys/syscall.h \
  1129. sys/sysctl.h \
  1130. sys/syslimits.h \
  1131. sys/time.h \
  1132. sys/types.h \
  1133. sys/un.h \
  1134. sys/utime.h \
  1135. sys/wait.h \
  1136. syslog.h \
  1137. utime.h])
  1138. AC_CHECK_HEADERS(sys/param.h)
  1139. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1140. [#ifdef HAVE_SYS_TYPES_H
  1141. #include <sys/types.h>
  1142. #endif
  1143. #ifdef HAVE_SYS_SOCKET_H
  1144. #include <sys/socket.h>
  1145. #endif])
  1146. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1147. [#ifdef HAVE_SYS_TYPES_H
  1148. #include <sys/types.h>
  1149. #endif
  1150. #ifdef HAVE_SYS_SOCKET_H
  1151. #include <sys/socket.h>
  1152. #endif
  1153. #ifdef HAVE_NET_IF_H
  1154. #include <net/if.h>
  1155. #endif
  1156. #ifdef HAVE_NETINET_IN_H
  1157. #include <netinet/in.h>
  1158. #endif])
  1159. AC_CHECK_HEADERS(linux/if.h,[],[],
  1160. [
  1161. #ifdef HAVE_SYS_SOCKET_H
  1162. #include <sys/socket.h>
  1163. #endif
  1164. ])
  1165. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1166. linux_netfilter_ipv4=1, linux_netfilter_ipv4=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. #ifdef HAVE_LIMITS_H
  1174. #include <limits.h>
  1175. #endif
  1176. #ifdef HAVE_LINUX_TYPES_H
  1177. #include <linux/types.h>
  1178. #endif
  1179. #ifdef HAVE_NETINET_IN6_H
  1180. #include <netinet/in6.h>
  1181. #endif
  1182. #ifdef HAVE_NETINET_IN_H
  1183. #include <netinet/in.h>
  1184. #endif])
  1185. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1186. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1187. [#ifdef HAVE_SYS_TYPES_H
  1188. #include <sys/types.h>
  1189. #endif
  1190. #ifdef HAVE_SYS_SOCKET_H
  1191. #include <sys/socket.h>
  1192. #endif
  1193. #ifdef HAVE_LIMITS_H
  1194. #include <limits.h>
  1195. #endif
  1196. #ifdef HAVE_LINUX_TYPES_H
  1197. #include <linux/types.h>
  1198. #endif
  1199. #ifdef HAVE_NETINET_IN6_H
  1200. #include <netinet/in6.h>
  1201. #endif
  1202. #ifdef HAVE_NETINET_IN_H
  1203. #include <netinet/in.h>
  1204. #endif
  1205. #ifdef HAVE_LINUX_IF_H
  1206. #include <linux/if.h>
  1207. #endif])
  1208. transparent_ok=0
  1209. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1210. transparent_ok=1
  1211. fi
  1212. if test "x$linux_netfilter_ipv4" = "x1"; then
  1213. transparent_ok=1
  1214. fi
  1215. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1216. transparent_ok=1
  1217. fi
  1218. if test "x$transparent_ok" = "x1"; then
  1219. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1220. else
  1221. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1222. fi
  1223. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1224. [#ifdef HAVE_SYS_TYPES_H
  1225. #include <sys/types.h>
  1226. #endif
  1227. #ifdef HAVE_SYS_TIME_H
  1228. #include <sys/time.h>
  1229. #endif])
  1230. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1231. dnl Watch out.
  1232. AC_CHECK_SIZEOF(int8_t)
  1233. AC_CHECK_SIZEOF(int16_t)
  1234. AC_CHECK_SIZEOF(int32_t)
  1235. AC_CHECK_SIZEOF(int64_t)
  1236. AC_CHECK_SIZEOF(uint8_t)
  1237. AC_CHECK_SIZEOF(uint16_t)
  1238. AC_CHECK_SIZEOF(uint32_t)
  1239. AC_CHECK_SIZEOF(uint64_t)
  1240. AC_CHECK_SIZEOF(intptr_t)
  1241. AC_CHECK_SIZEOF(uintptr_t)
  1242. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1243. AC_CHECK_SIZEOF(char)
  1244. AC_CHECK_SIZEOF(short)
  1245. AC_CHECK_SIZEOF(int)
  1246. AC_CHECK_SIZEOF(long)
  1247. AC_CHECK_SIZEOF(long long)
  1248. AC_CHECK_SIZEOF(__int64)
  1249. AC_CHECK_SIZEOF(void *)
  1250. AC_CHECK_SIZEOF(time_t)
  1251. AC_CHECK_SIZEOF(size_t)
  1252. AC_CHECK_SIZEOF(pid_t)
  1253. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1254. AC_PC_FROM_UCONTEXT([:])
  1255. dnl used to include sockaddr_storage, but everybody has that.
  1256. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1257. [#ifdef HAVE_SYS_TYPES_H
  1258. #include <sys/types.h>
  1259. #endif
  1260. #ifdef HAVE_NETINET_IN_H
  1261. #include <netinet/in.h>
  1262. #endif
  1263. #ifdef HAVE_NETINET_IN6_H
  1264. #include <netinet/in6.h>
  1265. #endif
  1266. #ifdef HAVE_SYS_SOCKET_H
  1267. #include <sys/socket.h>
  1268. #endif
  1269. #ifdef _WIN32
  1270. #define _WIN32_WINNT 0x0501
  1271. #define WIN32_LEAN_AND_MEAN
  1272. #include <winsock2.h>
  1273. #include <ws2tcpip.h>
  1274. #endif
  1275. ])
  1276. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1277. [#ifdef HAVE_SYS_TYPES_H
  1278. #include <sys/types.h>
  1279. #endif
  1280. #ifdef HAVE_NETINET_IN_H
  1281. #include <netinet/in.h>
  1282. #endif
  1283. #ifdef HAVE_NETINET_IN6_H
  1284. #include <netinet/in6.h>
  1285. #endif
  1286. #ifdef HAVE_SYS_SOCKET_H
  1287. #include <sys/socket.h>
  1288. #endif
  1289. #ifdef _WIN32
  1290. #define _WIN32_WINNT 0x0501
  1291. #define WIN32_LEAN_AND_MEAN
  1292. #include <winsock2.h>
  1293. #include <ws2tcpip.h>
  1294. #endif
  1295. ])
  1296. AC_CHECK_TYPES([rlim_t], , ,
  1297. [#ifdef HAVE_SYS_TYPES_H
  1298. #include <sys/types.h>
  1299. #endif
  1300. #ifdef HAVE_SYS_TIME_H
  1301. #include <sys/time.h>
  1302. #endif
  1303. #ifdef HAVE_SYS_RESOURCE_H
  1304. #include <sys/resource.h>
  1305. #endif
  1306. ])
  1307. AX_CHECK_SIGN([time_t],
  1308. [ : ],
  1309. [ : ], [
  1310. #ifdef HAVE_SYS_TYPES_H
  1311. #include <sys/types.h>
  1312. #endif
  1313. #ifdef HAVE_SYS_TIME_H
  1314. #include <sys/time.h>
  1315. #endif
  1316. #ifdef HAVE_TIME_H
  1317. #include <time.h>
  1318. #endif
  1319. ])
  1320. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1321. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1322. fi
  1323. AX_CHECK_SIGN([size_t],
  1324. [ tor_cv_size_t_signed=yes ],
  1325. [ tor_cv_size_t_signed=no ], [
  1326. #ifdef HAVE_SYS_TYPES_H
  1327. #include <sys/types.h>
  1328. #endif
  1329. ])
  1330. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1331. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1332. fi
  1333. AX_CHECK_SIGN([enum always],
  1334. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1335. [ : ], [
  1336. enum always { AAA, BBB, CCC };
  1337. ])
  1338. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1339. #ifdef HAVE_SYS_SOCKET_H
  1340. #include <sys/socket.h>
  1341. #endif
  1342. ])
  1343. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1344. AC_CHECK_SIZEOF(cell_t)
  1345. # Now make sure that NULL can be represented as zero bytes.
  1346. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1347. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1348. [[#include <stdlib.h>
  1349. #include <string.h>
  1350. #include <stdio.h>
  1351. #ifdef HAVE_STDDEF_H
  1352. #include <stddef.h>
  1353. #endif
  1354. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1355. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1356. [tor_cv_null_is_zero=yes],
  1357. [tor_cv_null_is_zero=no],
  1358. [tor_cv_null_is_zero=cross])])
  1359. if test "$tor_cv_null_is_zero" = "cross"; then
  1360. # Cross-compiling; let's hope that the target isn't raving mad.
  1361. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1362. fi
  1363. if test "$tor_cv_null_is_zero" != "no"; then
  1364. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1365. [Define to 1 iff memset(0) sets pointers to NULL])
  1366. fi
  1367. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1368. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1369. [[#include <stdlib.h>
  1370. #include <string.h>
  1371. #include <stdio.h>
  1372. #ifdef HAVE_STDDEF_H
  1373. #include <stddef.h>
  1374. #endif
  1375. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1376. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1377. [tor_cv_dbl0_is_zero=yes],
  1378. [tor_cv_dbl0_is_zero=no],
  1379. [tor_cv_dbl0_is_zero=cross])])
  1380. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1381. # Cross-compiling; let's hope that the target isn't raving mad.
  1382. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1383. fi
  1384. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1385. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1386. [Define to 1 iff memset(0) sets doubles to 0.0])
  1387. fi
  1388. # And what happens when we malloc zero?
  1389. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1390. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1391. [[#include <stdlib.h>
  1392. #include <string.h>
  1393. #include <stdio.h>
  1394. #ifdef HAVE_STDDEF_H
  1395. #include <stddef.h>
  1396. #endif
  1397. int main () { return malloc(0)?0:1; }]])],
  1398. [tor_cv_malloc_zero_works=yes],
  1399. [tor_cv_malloc_zero_works=no],
  1400. [tor_cv_malloc_zero_works=cross])])
  1401. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1402. # Cross-compiling; let's hope that the target isn't raving mad.
  1403. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1404. fi
  1405. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1406. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1407. [Define to 1 iff malloc(0) returns a pointer])
  1408. fi
  1409. # whether we seem to be in a 2s-complement world.
  1410. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1411. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1412. [[int main () { int problem = ((-99) != (~99)+1);
  1413. return problem ? 1 : 0; }]])],
  1414. [tor_cv_twos_complement=yes],
  1415. [tor_cv_twos_complement=no],
  1416. [tor_cv_twos_complement=cross])])
  1417. if test "$tor_cv_twos_complement" = "cross"; then
  1418. # Cross-compiling; let's hope that the target isn't raving mad.
  1419. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1420. fi
  1421. if test "$tor_cv_twos_complement" != "no"; then
  1422. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1423. [Define to 1 iff we represent negative integers with
  1424. two's complement])
  1425. fi
  1426. # What does shifting a negative value do?
  1427. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1428. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1429. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1430. [tor_cv_sign_extend=yes],
  1431. [tor_cv_sign_extend=no],
  1432. [tor_cv_sign_extend=cross])])
  1433. if test "$tor_cv_sign_extend" = "cross"; then
  1434. # Cross-compiling; let's hope that the target isn't raving mad.
  1435. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1436. fi
  1437. if test "$tor_cv_sign_extend" != "no"; then
  1438. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1439. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1440. fi
  1441. # Is uint8_t the same type as unsigned char?
  1442. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1443. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1444. #include <stdint.h>
  1445. extern uint8_t c;
  1446. unsigned char c;]])],
  1447. [tor_cv_uint8_uchar=yes],
  1448. [tor_cv_uint8_uchar=no],
  1449. [tor_cv_uint8_uchar=cross])])
  1450. if test "$tor_cv_uint8_uchar" = "cross"; then
  1451. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1452. fi
  1453. if test "$tor_cv_uint8_uchar" = "no"; then
  1454. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1455. fi
  1456. # Whether we should use the dmalloc memory allocation debugging library.
  1457. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1458. AC_ARG_WITH(dmalloc,
  1459. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1460. [if [[ "$withval" = "yes" ]]; then
  1461. dmalloc=1
  1462. AC_MSG_RESULT(yes)
  1463. else
  1464. dmalloc=1
  1465. AC_MSG_RESULT(no)
  1466. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1467. )
  1468. if [[ $dmalloc -eq 1 ]]; then
  1469. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1470. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1471. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1472. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1473. fi
  1474. AC_ARG_WITH(tcmalloc,
  1475. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1476. [ tcmalloc=yes ], [ tcmalloc=no ])
  1477. if test "x$tcmalloc" = "xyes"; then
  1478. LDFLAGS="-ltcmalloc $LDFLAGS"
  1479. fi
  1480. using_custom_malloc=no
  1481. if test "x$enable_openbsd_malloc" = "xyes"; then
  1482. using_custom_malloc=yes
  1483. fi
  1484. if test "x$tcmalloc" = "xyes"; then
  1485. using_custom_malloc=yes
  1486. fi
  1487. if test "$using_custom_malloc" = "no"; then
  1488. AC_CHECK_FUNCS(mallinfo)
  1489. fi
  1490. # By default, we're going to assume we don't have mlockall()
  1491. # bionic and other platforms have various broken mlockall subsystems.
  1492. # Some systems don't have a working mlockall, some aren't linkable,
  1493. # and some have it but don't declare it.
  1494. AC_CHECK_FUNCS(mlockall)
  1495. AC_CHECK_DECLS([mlockall], , , [
  1496. #ifdef HAVE_SYS_MMAN_H
  1497. #include <sys/mman.h>
  1498. #endif])
  1499. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1500. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1501. # using macros
  1502. AC_CHECK_DECLS([getpagesize], , , [
  1503. #ifdef HAVE_UNISTD_H
  1504. #include <unistd.h>
  1505. #endif])
  1506. # Allow user to specify an alternate syslog facility
  1507. AC_ARG_WITH(syslog-facility,
  1508. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1509. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1510. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1511. AC_SUBST(LOGFACILITY)
  1512. # Check if we have getresuid and getresgid
  1513. AC_CHECK_FUNCS(getresuid getresgid)
  1514. # Check for gethostbyname_r in all its glorious incompatible versions.
  1515. # (This logic is based on that in Python's configure.in)
  1516. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1517. [Define this if you have any gethostbyname_r()])
  1518. AC_CHECK_FUNC(gethostbyname_r, [
  1519. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1520. OLD_CFLAGS=$CFLAGS
  1521. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1522. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1523. #include <netdb.h>
  1524. ]], [[
  1525. char *cp1, *cp2;
  1526. struct hostent *h1, *h2;
  1527. int i1, i2;
  1528. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1529. ]])],[
  1530. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1531. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1532. [Define this if gethostbyname_r takes 6 arguments])
  1533. AC_MSG_RESULT(6)
  1534. ], [
  1535. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1536. #include <netdb.h>
  1537. ]], [[
  1538. char *cp1, *cp2;
  1539. struct hostent *h1;
  1540. int i1, i2;
  1541. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1542. ]])], [
  1543. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1544. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1545. [Define this if gethostbyname_r takes 5 arguments])
  1546. AC_MSG_RESULT(5)
  1547. ], [
  1548. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1549. #include <netdb.h>
  1550. ]], [[
  1551. char *cp1;
  1552. struct hostent *h1;
  1553. struct hostent_data hd;
  1554. (void) gethostbyname_r(cp1,h1,&hd);
  1555. ]])], [
  1556. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1557. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1558. [Define this if gethostbyname_r takes 3 arguments])
  1559. AC_MSG_RESULT(3)
  1560. ], [
  1561. AC_MSG_RESULT(0)
  1562. ])
  1563. ])
  1564. ])
  1565. CFLAGS=$OLD_CFLAGS
  1566. ])
  1567. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1568. tor_cv_have_func_macro,
  1569. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1570. #include <stdio.h>
  1571. int main(int c, char **v) { puts(__func__); }])],
  1572. tor_cv_have_func_macro=yes,
  1573. tor_cv_have_func_macro=no))
  1574. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1575. tor_cv_have_FUNC_macro,
  1576. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1577. #include <stdio.h>
  1578. int main(int c, char **v) { puts(__FUNC__); }])],
  1579. tor_cv_have_FUNC_macro=yes,
  1580. tor_cv_have_FUNC_macro=no))
  1581. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1582. tor_cv_have_FUNCTION_macro,
  1583. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1584. #include <stdio.h>
  1585. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1586. tor_cv_have_FUNCTION_macro=yes,
  1587. tor_cv_have_FUNCTION_macro=no))
  1588. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1589. tor_cv_have_environ_declared,
  1590. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1591. #ifdef HAVE_UNISTD_H
  1592. #include <unistd.h>
  1593. #endif
  1594. #include <stdlib.h>
  1595. int main(int c, char **v) { char **t = environ; }])],
  1596. tor_cv_have_environ_declared=yes,
  1597. tor_cv_have_environ_declared=no))
  1598. if test "$tor_cv_have_func_macro" = "yes"; then
  1599. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1600. fi
  1601. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1602. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1603. fi
  1604. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1605. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1606. [Defined if the compiler supports __FUNCTION__])
  1607. fi
  1608. if test "$tor_cv_have_environ_declared" = "yes"; then
  1609. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1610. [Defined if we have extern char **environ already declared])
  1611. fi
  1612. # $prefix stores the value of the --prefix command line option, or
  1613. # NONE if the option wasn't set. In the case that it wasn't set, make
  1614. # it be the default, so that we can use it to expand directories now.
  1615. if test "x$prefix" = "xNONE"; then
  1616. prefix=$ac_default_prefix
  1617. fi
  1618. # and similarly for $exec_prefix
  1619. if test "x$exec_prefix" = "xNONE"; then
  1620. exec_prefix=$prefix
  1621. fi
  1622. if test "x$BUILDDIR" = "x"; then
  1623. BUILDDIR=`pwd`
  1624. fi
  1625. AC_SUBST(BUILDDIR)
  1626. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1627. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1628. if test "x$CONFDIR" = "x"; then
  1629. CONFDIR=`eval echo $sysconfdir/tor`
  1630. fi
  1631. AC_SUBST(CONFDIR)
  1632. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1633. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1634. BINDIR=`eval echo $bindir`
  1635. AC_SUBST(BINDIR)
  1636. LOCALSTATEDIR=`eval echo $localstatedir`
  1637. AC_SUBST(LOCALSTATEDIR)
  1638. if test "$bwin32" = "true"; then
  1639. # Test if the linker supports the --nxcompat and --dynamicbase options
  1640. # for Windows
  1641. save_LDFLAGS="$LDFLAGS"
  1642. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1643. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1644. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1645. [AC_MSG_RESULT([yes])]
  1646. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1647. [AC_MSG_RESULT([no])]
  1648. )
  1649. LDFLAGS="$save_LDFLAGS"
  1650. fi
  1651. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1652. # than autoconf's macros like.
  1653. if test "$GCC" = "yes"; then
  1654. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1655. # accident waiting to happen.
  1656. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1657. else
  1658. # Override optimization level for non-gcc compilers
  1659. CFLAGS="$CFLAGS -O"
  1660. enable_gcc_warnings=no
  1661. enable_gcc_warnings_advisory=no
  1662. fi
  1663. # Warnings implies advisory-warnings and -Werror.
  1664. if test "$enable_gcc_warnings" = "yes"; then
  1665. enable_gcc_warnings_advisory=yes
  1666. enable_fatal_warnings=yes
  1667. fi
  1668. # OS X Lion started deprecating the system openssl. Let's just disable
  1669. # all deprecation warnings on OS X. Also, to potentially make the binary
  1670. # a little smaller, let's enable dead_strip.
  1671. case "$host_os" in
  1672. darwin*)
  1673. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1674. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1675. esac
  1676. # Add some more warnings which we use in development but not in the
  1677. # released versions. (Some relevant gcc versions can't handle these.)
  1678. #
  1679. # Note that we have to do this near the end of the autoconf process, or
  1680. # else we may run into problems when these warnings hit on the testing C
  1681. # programs that autoconf wants to build.
  1682. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1683. case "$host" in
  1684. *-*-openbsd* | *-*-bitrig*)
  1685. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1686. # That's fine, except that the headers don't pass -Wredundant-decls.
  1687. # Therefore, let's disable -Wsystem-headers when we're building
  1688. # with maximal warnings on OpenBSD.
  1689. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1690. esac
  1691. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1692. # have it work better.
  1693. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1694. # This warning was added in gcc 4.3, but it appears to generate
  1695. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1696. #CFLAGS="$CFLAGS -Wlogical-op"
  1697. m4_foreach_w([warning_flag], [
  1698. -Waddress
  1699. -Waddress-of-array-temporary
  1700. -Waddress-of-temporary
  1701. -Wambiguous-macro
  1702. -Wanonymous-pack-parens
  1703. -Warc
  1704. -Warc-abi
  1705. -Warc-bridge-casts-disallowed-in-nonarc
  1706. -Warc-maybe-repeated-use-of-weak
  1707. -Warc-performSelector-leaks
  1708. -Warc-repeated-use-of-weak
  1709. -Warray-bounds
  1710. -Warray-bounds-pointer-arithmetic
  1711. -Wasm
  1712. -Wasm-operand-widths
  1713. -Watomic-properties
  1714. -Watomic-property-with-user-defined-accessor
  1715. -Wauto-import
  1716. -Wauto-storage-class
  1717. -Wauto-var-id
  1718. -Wavailability
  1719. -Wbackslash-newline-escape
  1720. -Wbad-array-new-length
  1721. -Wbind-to-temporary-copy
  1722. -Wbitfield-constant-conversion
  1723. -Wbool-conversion
  1724. -Wbool-conversions
  1725. -Wbuiltin-requires-header
  1726. -Wchar-align
  1727. -Wcompare-distinct-pointer-types
  1728. -Wcomplex-component-init
  1729. -Wconditional-type-mismatch
  1730. -Wconfig-macros
  1731. -Wconstant-conversion
  1732. -Wconstant-logical-operand
  1733. -Wconstexpr-not-const
  1734. -Wcustom-atomic-properties
  1735. -Wdangling-field
  1736. -Wdangling-initializer-list
  1737. -Wdate-time
  1738. -Wdelegating-ctor-cycles
  1739. -Wdeprecated-implementations
  1740. -Wdeprecated-register
  1741. -Wdirect-ivar-access
  1742. -Wdiscard-qual
  1743. -Wdistributed-object-modifiers
  1744. -Wdivision-by-zero
  1745. -Wdollar-in-identifier-extension
  1746. -Wdouble-promotion
  1747. -Wduplicate-decl-specifier
  1748. -Wduplicate-enum
  1749. -Wduplicate-method-arg
  1750. -Wduplicate-method-match
  1751. -Wduplicated-cond
  1752. -Wdynamic-class-memaccess
  1753. -Wembedded-directive
  1754. -Wempty-translation-unit
  1755. -Wenum-conversion
  1756. -Wexit-time-destructors
  1757. -Wexplicit-ownership-type
  1758. -Wextern-initializer
  1759. -Wextra
  1760. -Wextra-semi
  1761. -Wextra-tokens
  1762. -Wflexible-array-extensions
  1763. -Wfloat-conversion
  1764. -Wformat-non-iso
  1765. -Wfour-char-constants
  1766. -Wgcc-compat
  1767. -Wglobal-constructors
  1768. -Wgnu-array-member-paren-init
  1769. -Wgnu-designator
  1770. -Wgnu-static-float-init
  1771. -Wheader-guard
  1772. -Wheader-hygiene
  1773. -Widiomatic-parentheses
  1774. -Wignored-attributes
  1775. -Wimplicit-atomic-properties
  1776. -Wimplicit-conversion-floating-point-to-bool
  1777. -Wimplicit-exception-spec-mismatch
  1778. -Wimplicit-fallthrough
  1779. -Wimplicit-fallthrough-per-function
  1780. -Wimplicit-retain-self
  1781. -Wimport-preprocessor-directive-pedantic
  1782. -Wincompatible-library-redeclaration
  1783. -Wincompatible-pointer-types-discards-qualifiers
  1784. -Wincomplete-implementation
  1785. -Wincomplete-module
  1786. -Wincomplete-umbrella
  1787. -Winit-self
  1788. -Wint-conversions
  1789. -Wint-to-void-pointer-cast
  1790. -Winteger-overflow
  1791. -Winvalid-constexpr
  1792. -Winvalid-iboutlet
  1793. -Winvalid-noreturn
  1794. -Winvalid-pp-token
  1795. -Winvalid-source-encoding
  1796. -Winvalid-token-paste
  1797. -Wknr-promoted-parameter
  1798. -Wlarge-by-value-copy
  1799. -Wliteral-conversion
  1800. -Wliteral-range
  1801. -Wlocal-type-template-args
  1802. -Wlogical-op
  1803. -Wloop-analysis
  1804. -Wmain-return-type
  1805. -Wmalformed-warning-check
  1806. -Wmethod-signatures
  1807. -Wmicrosoft
  1808. -Wmicrosoft-exists
  1809. -Wmismatched-parameter-types
  1810. -Wmismatched-return-types
  1811. -Wmissing-field-initializers
  1812. -Wmissing-format-attribute
  1813. -Wmissing-noreturn
  1814. -Wmissing-selector-name
  1815. -Wmissing-sysroot
  1816. -Wmissing-variable-declarations
  1817. -Wmodule-conflict
  1818. -Wnested-anon-types
  1819. -Wnewline-eof
  1820. -Wnon-literal-null-conversion
  1821. -Wnon-pod-varargs
  1822. -Wnonportable-cfstrings
  1823. -Wnormalized=nfkc
  1824. -Wnull-arithmetic
  1825. -Wnull-character
  1826. -Wnull-conversion
  1827. -Wnull-dereference
  1828. -Wout-of-line-declaration
  1829. -Wover-aligned
  1830. -Woverlength-strings
  1831. -Woverride-init
  1832. -Woverriding-method-mismatch
  1833. -Wpointer-type-mismatch
  1834. -Wpredefined-identifier-outside-function
  1835. -Wprotocol-property-synthesis-ambiguity
  1836. -Wreadonly-iboutlet-property
  1837. -Wreadonly-setter-attrs
  1838. -Wreceiver-expr
  1839. -Wreceiver-forward-class
  1840. -Wreceiver-is-weak
  1841. -Wreinterpret-base-class
  1842. -Wrequires-super-attribute
  1843. -Wreserved-user-defined-literal
  1844. -Wreturn-stack-address
  1845. -Wsection
  1846. -Wselector-type-mismatch
  1847. -Wsentinel
  1848. -Wserialized-diagnostics
  1849. -Wshadow
  1850. -Wshift-count-negative
  1851. -Wshift-count-overflow
  1852. -Wshift-negative-value
  1853. -Wshift-overflow=2
  1854. -Wshift-sign-overflow
  1855. -Wshorten-64-to-32
  1856. -Wsizeof-array-argument
  1857. -Wsource-uses-openmp
  1858. -Wstatic-float-init
  1859. -Wstatic-in-inline
  1860. -Wstatic-local-in-inline
  1861. -Wstrict-overflow=1
  1862. -Wstring-compare
  1863. -Wstring-conversion
  1864. -Wstrlcpy-strlcat-size
  1865. -Wstrncat-size
  1866. -Wsuggest-attribute=format
  1867. -Wsuggest-attribute=noreturn
  1868. -Wsuper-class-method-mismatch
  1869. -Wswitch-bool
  1870. -Wsync-nand
  1871. -Wtautological-constant-out-of-range-compare
  1872. -Wtentative-definition-incomplete-type
  1873. -Wtrampolines
  1874. -Wtype-safety
  1875. -Wtypedef-redefinition
  1876. -Wtypename-missing
  1877. -Wundefined-inline
  1878. -Wundefined-internal
  1879. -Wundefined-reinterpret-cast
  1880. -Wunicode
  1881. -Wunicode-whitespace
  1882. -Wunknown-warning-option
  1883. -Wunnamed-type-template-args
  1884. -Wunneeded-member-function
  1885. -Wunsequenced
  1886. -Wunsupported-visibility
  1887. -Wunused-but-set-parameter
  1888. -Wunused-but-set-variable
  1889. -Wunused-command-line-argument
  1890. -Wunused-const-variable=2
  1891. -Wunused-exception-parameter
  1892. -Wunused-local-typedefs
  1893. -Wunused-member-function
  1894. -Wunused-sanitize-argument
  1895. -Wunused-volatile-lvalue
  1896. -Wuser-defined-literals
  1897. -Wvariadic-macros
  1898. -Wvector-conversion
  1899. -Wvector-conversions
  1900. -Wvexing-parse
  1901. -Wvisibility
  1902. -Wvla-extension
  1903. -Wzero-length-array
  1904. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1905. dnl We should re-enable this in some later version. Clang doesn't
  1906. dnl mind, but it causes trouble with GCC.
  1907. dnl -Wstrict-overflow=2
  1908. dnl These seem to require annotations that we don't currently use,
  1909. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1910. dnl -Wthread-safety
  1911. dnl -Wthread-safety-analysis
  1912. dnl -Wthread-safety-attributes
  1913. dnl -Wthread-safety-beta
  1914. dnl -Wthread-safety-precise
  1915. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1916. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1917. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1918. CFLAGS="$CFLAGS -Wwrite-strings"
  1919. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1920. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1921. CFLAGS="$CFLAGS -Wunused-parameter "
  1922. # These interfere with building main() { return 0; }, which autoconf
  1923. # likes to use as its default program.
  1924. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1925. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1926. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1927. fi
  1928. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1929. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1930. fi
  1931. if test "x$enable_fatal_warnings" = "xyes"; then
  1932. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1933. # default autoconf programs are full of errors.
  1934. CFLAGS="$CFLAGS -Werror"
  1935. fi
  1936. fi
  1937. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1938. case "$host_os" in
  1939. darwin*)
  1940. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1941. esac
  1942. fi
  1943. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1944. AC_CONFIG_FILES([
  1945. Doxyfile
  1946. Makefile
  1947. contrib/dist/suse/tor.sh
  1948. contrib/operator-tools/tor.logrotate
  1949. contrib/dist/tor.sh
  1950. contrib/dist/torctl
  1951. contrib/dist/tor.service
  1952. src/config/torrc.sample
  1953. src/config/torrc.minimal
  1954. src/rust/.cargo/config
  1955. scripts/maint/checkOptionDocs.pl
  1956. scripts/maint/updateVersions.pl
  1957. ])
  1958. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1959. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1960. for file in $regular_mans ; do
  1961. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1962. echo "==================================";
  1963. echo;
  1964. echo "Building Tor has failed since manpages cannot be built.";
  1965. echo;
  1966. echo "You need asciidoc installed to be able to build the manpages.";
  1967. echo "To build without manpages, use the --disable-asciidoc argument";
  1968. echo "when calling configure.";
  1969. echo;
  1970. echo "==================================";
  1971. exit 1;
  1972. fi
  1973. done
  1974. fi
  1975. if test "$fragile_hardening" = "yes"; then
  1976. AC_MSG_WARN([
  1977. ============
  1978. Warning! Building Tor with --enable-fragile-hardening (also known as
  1979. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  1980. other kinds of attacks easier. A Tor instance build with this option will be
  1981. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  1982. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  1983. denial of service attacks. For more information, see
  1984. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  1985. ============
  1986. ])
  1987. fi
  1988. AC_OUTPUT