configure.ac 69 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],[0.3.3.0-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_USE_SYSTEM_EXTENSIONS
  16. AC_CANONICAL_HOST
  17. PKG_PROG_PKG_CONFIG
  18. if test -f "/etc/redhat-release"; then
  19. if test -f "/usr/kerberos/include"; then
  20. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  21. fi
  22. fi
  23. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  24. # the += operator on it in src/or/Makefile.am
  25. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  28. AC_ARG_ENABLE(static-openssl,
  29. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  30. AC_ARG_ENABLE(static-libevent,
  31. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  32. AC_ARG_ENABLE(static-zlib,
  33. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  34. AC_ARG_ENABLE(static-tor,
  35. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  36. AC_ARG_ENABLE(unittests,
  37. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  38. AC_ARG_ENABLE(coverage,
  39. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  40. AC_ARG_ENABLE(asserts-in-tests,
  41. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  42. AC_ARG_ENABLE(system-torrc,
  43. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  44. AC_ARG_ENABLE(libfuzzer,
  45. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  46. AC_ARG_ENABLE(oss-fuzz,
  47. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  48. AC_ARG_ENABLE(memory-sentinels,
  49. AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
  50. AC_ARG_ENABLE(rust,
  51. AS_HELP_STRING(--enable-rust, [enable rust integration]))
  52. AC_ARG_ENABLE(cargo-online-mode,
  53. AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
  54. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  55. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  56. fi
  57. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  58. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  59. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  60. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  61. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  62. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  63. if test "$enable_static_tor" = "yes"; then
  64. enable_static_libevent="yes";
  65. enable_static_openssl="yes";
  66. enable_static_zlib="yes";
  67. CFLAGS="$CFLAGS -static"
  68. fi
  69. if test "$enable_system_torrc" = "no"; then
  70. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  71. [Defined if we're not going to look for a torrc in SYSCONF])
  72. fi
  73. if test "$enable_memory_sentinels" = "no"; then
  74. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  75. [Defined if we're turning off memory safety code to look for bugs])
  76. fi
  77. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  78. AC_ARG_ENABLE(asciidoc,
  79. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  80. [case "${enableval}" in
  81. "yes") asciidoc=true ;;
  82. "no") asciidoc=false ;;
  83. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  84. esac], [asciidoc=true])
  85. # systemd notify support
  86. AC_ARG_ENABLE(systemd,
  87. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  88. [case "${enableval}" in
  89. "yes") systemd=true ;;
  90. "no") systemd=false ;;
  91. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  92. esac], [systemd=auto])
  93. # systemd support
  94. if test "x$enable_systemd" = "xno"; then
  95. have_systemd=no;
  96. else
  97. PKG_CHECK_MODULES(SYSTEMD,
  98. [libsystemd-daemon],
  99. have_systemd=yes,
  100. have_systemd=no)
  101. if test "x$have_systemd" = "xno"; then
  102. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  103. PKG_CHECK_MODULES(SYSTEMD,
  104. [libsystemd],
  105. have_systemd=yes,
  106. have_systemd=no)
  107. fi
  108. fi
  109. if test "x$have_systemd" = "xyes"; then
  110. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  111. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  112. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  113. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  114. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  115. fi
  116. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  117. AC_SUBST(TOR_SYSTEMD_LIBS)
  118. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  119. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  120. fi
  121. case "$host" in
  122. *-*-solaris* )
  123. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  124. ;;
  125. esac
  126. AC_ARG_ENABLE(gcc-warnings,
  127. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  128. AC_ARG_ENABLE(fatal-warnings,
  129. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  130. AC_ARG_ENABLE(gcc-warnings-advisory,
  131. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  132. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  133. AC_ARG_ENABLE(gcc-hardening,
  134. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  135. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  136. AC_ARG_ENABLE(expensive-hardening,
  137. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  138. AC_ARG_ENABLE(fragile-hardening,
  139. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  140. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  141. fragile_hardening="yes"
  142. fi
  143. dnl Linker hardening options
  144. dnl Currently these options are ELF specific - you can't use this with MacOSX
  145. AC_ARG_ENABLE(linker-hardening,
  146. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  147. AC_ARG_ENABLE(local-appdata,
  148. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  149. if test "$enable_local_appdata" = "yes"; then
  150. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  151. [Defined if we default to host local appdata paths on Windows])
  152. fi
  153. # Tor2web mode flag
  154. AC_ARG_ENABLE(tor2web-mode,
  155. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  156. [if test "x$enableval" = "xyes"; then
  157. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  158. fi])
  159. AC_ARG_ENABLE(tool-name-check,
  160. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  161. AC_ARG_ENABLE(seccomp,
  162. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  163. AC_ARG_ENABLE(libscrypt,
  164. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  165. dnl Enable event tracing which are transformed to debug log statement.
  166. AC_ARG_ENABLE(event-tracing-debug,
  167. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  168. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  169. if test x$enable_event_tracing_debug = xyes; then
  170. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  171. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  172. fi
  173. dnl check for the correct "ar" when cross-compiling.
  174. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  175. dnl so kludge up a replacement for the case where it isn't there yet.)
  176. m4_ifdef([AM_PROG_AR],
  177. [AM_PROG_AR],
  178. [AN_MAKEVAR([AR], [AC_PROG_AR])
  179. AN_PROGRAM([ar], [AC_PROG_AR])
  180. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  181. AC_PROG_AR])
  182. dnl Check whether the above macro has settled for a simply named tool even
  183. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  184. dnl because that will find any cc on the system, not only the cross-compiler,
  185. dnl and then verify that a binary built with this compiler runs on the
  186. dnl build system. It will then come to the false conclusion that we're not
  187. dnl cross-compiling.
  188. if test "x$enable_tool_name_check" != "xno"; then
  189. if test "x$ac_tool_warned" = "xyes"; then
  190. 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.)])
  191. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  192. 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.)])
  193. fi
  194. fi
  195. AC_PROG_CC
  196. AC_PROG_CPP
  197. AC_PROG_MAKE_SET
  198. AC_PROG_RANLIB
  199. AC_PROG_SED
  200. AC_ARG_VAR([PERL], [path to Perl binary])
  201. AC_CHECK_PROGS([PERL], [perl])
  202. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  203. dnl check for asciidoc and a2x
  204. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  205. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  206. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  207. AM_PROG_CC_C_O
  208. AC_PROG_CC_C99
  209. AC_ARG_VAR([PYTHON], [path to Python binary])
  210. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  211. if test "x$PYTHON" = "x"; then
  212. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  213. fi
  214. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  215. dnl List all external rust crates we depend on here. Include the version
  216. rust_crates="libc-0.2.22"
  217. AC_SUBST(rust_crates)
  218. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  219. AC_C_FLEXIBLE_ARRAY_MEMBER
  220. ], [
  221. dnl Maybe we've got an old autoconf...
  222. AC_CACHE_CHECK([for flexible array members],
  223. tor_cv_c_flexarray,
  224. [AC_COMPILE_IFELSE(
  225. AC_LANG_PROGRAM([
  226. struct abc { int a; char b[]; };
  227. ], [
  228. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  229. def->b[0] = 33;
  230. ]),
  231. [tor_cv_c_flexarray=yes],
  232. [tor_cv_c_flexarray=no])])
  233. if test "$tor_cv_flexarray" = "yes"; then
  234. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  235. else
  236. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  237. fi
  238. ])
  239. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  240. tor_cv_c_c99_decl,
  241. [AC_COMPILE_IFELSE(
  242. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  243. [tor_cv_c_c99_decl=yes],
  244. [tor_cv_c_c99_decl=no] )])
  245. if test "$tor_cv_c_c99_decl" != "yes"; then
  246. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  247. fi
  248. AC_CACHE_CHECK([for working C99 designated initializers],
  249. tor_cv_c_c99_designated_init,
  250. [AC_COMPILE_IFELSE(
  251. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  252. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  253. [tor_cv_c_c99_designated_init=yes],
  254. [tor_cv_c_c99_designated_init=no] )])
  255. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  256. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  257. fi
  258. TORUSER=_tor
  259. AC_ARG_WITH(tor-user,
  260. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  261. [
  262. TORUSER=$withval
  263. ]
  264. )
  265. AC_SUBST(TORUSER)
  266. TORGROUP=_tor
  267. AC_ARG_WITH(tor-group,
  268. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  269. [
  270. TORGROUP=$withval
  271. ]
  272. )
  273. AC_SUBST(TORGROUP)
  274. dnl If _WIN32 is defined and non-zero, we are building for win32
  275. AC_MSG_CHECKING([for win32])
  276. AC_RUN_IFELSE([AC_LANG_SOURCE([
  277. int main(int c, char **v) {
  278. #ifdef _WIN32
  279. #if _WIN32
  280. return 0;
  281. #else
  282. return 1;
  283. #endif
  284. #else
  285. return 2;
  286. #endif
  287. }])],
  288. bwin32=true; AC_MSG_RESULT([yes]),
  289. bwin32=false; AC_MSG_RESULT([no]),
  290. bwin32=cross; AC_MSG_RESULT([cross])
  291. )
  292. if test "$bwin32" = "cross"; then
  293. AC_MSG_CHECKING([for win32 (cross)])
  294. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  295. #ifdef _WIN32
  296. int main(int c, char **v) {return 0;}
  297. #else
  298. #error
  299. int main(int c, char **v) {return x(y);}
  300. #endif
  301. ])],
  302. bwin32=true; AC_MSG_RESULT([yes]),
  303. bwin32=false; AC_MSG_RESULT([no]))
  304. fi
  305. AH_BOTTOM([
  306. #ifdef _WIN32
  307. /* Defined to access windows functions and definitions for >=WinXP */
  308. # ifndef WINVER
  309. # define WINVER 0x0501
  310. # endif
  311. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  312. # ifndef _WIN32_WINNT
  313. # define _WIN32_WINNT 0x0501
  314. # endif
  315. /* Defined to avoid including some windows headers as part of Windows.h */
  316. # ifndef WIN32_LEAN_AND_MEAN
  317. # define WIN32_LEAN_AND_MEAN 1
  318. # endif
  319. #endif
  320. ])
  321. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  322. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  323. dnl Enable C99 when compiling with MIPSpro
  324. AC_MSG_CHECKING([for MIPSpro compiler])
  325. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  326. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  327. #error
  328. return x(y);
  329. #endif
  330. ])],
  331. bmipspro=false; AC_MSG_RESULT(no),
  332. bmipspro=true; AC_MSG_RESULT(yes))
  333. if test "$bmipspro" = "true"; then
  334. CFLAGS="$CFLAGS -c99"
  335. fi
  336. AC_C_BIGENDIAN
  337. if test "x$enable_rust" = "xyes"; then
  338. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  339. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  340. if test "x$RUSTC" = "xno"; then
  341. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  342. fi
  343. AC_ARG_VAR([CARGO], [path to the cargo binary])
  344. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  345. if test "x$CARGO" = "xno"; then
  346. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  347. fi
  348. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  349. if test "x$enable_cargo_online_mode" = "xyes"; then
  350. CARGO_ONLINE=
  351. RUST_DL=#
  352. else
  353. CARGO_ONLINE=--frozen
  354. RUST_DL=
  355. dnl When we're not allowed to touch the network, we need crate dependencies
  356. dnl locally available.
  357. AC_MSG_CHECKING([rust crate dependencies])
  358. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  359. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  360. TOR_RUST_DEPENDENCIES="$srcdir/src/ext/rust/"
  361. NEED_MOD=1
  362. fi
  363. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  364. 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.])
  365. fi
  366. for dep in $rust_crates; do
  367. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  368. 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.])
  369. fi
  370. done
  371. if test "x$NEED_MOD" = "x1"; then
  372. dnl When looking for dependencies from cargo, pick right directory
  373. TOR_RUST_DEPENDENCIES="../../src/ext/rust"
  374. fi
  375. fi
  376. dnl For now both MSVC and MinGW rust libraries will output static libs with
  377. dnl the MSVC naming convention.
  378. if test "$bwin32" = "true"; then
  379. TOR_RUST_STATIC_NAME=tor_rust.lib
  380. else
  381. TOR_RUST_STATIC_NAME=libtor_rust.a
  382. fi
  383. AC_SUBST(TOR_RUST_STATIC_NAME)
  384. AC_SUBST(CARGO_ONLINE)
  385. AC_SUBST(RUST_DL)
  386. dnl Let's check the rustc version, too
  387. AC_MSG_CHECKING([rust version])
  388. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  389. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  390. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  391. AC_MSG_ERROR([rustc version couldn't be identified])
  392. fi
  393. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  394. AC_MSG_ERROR([rustc must be at least version 1.14])
  395. fi
  396. fi
  397. AC_SEARCH_LIBS(socket, [socket network])
  398. AC_SEARCH_LIBS(gethostbyname, [nsl])
  399. AC_SEARCH_LIBS(dlopen, [dl])
  400. AC_SEARCH_LIBS(inet_aton, [resolv])
  401. AC_SEARCH_LIBS(backtrace, [execinfo])
  402. saved_LIBS="$LIBS"
  403. AC_SEARCH_LIBS([clock_gettime], [rt])
  404. if test "$LIBS" != "$saved_LIBS"; then
  405. # Looks like we need -lrt for clock_gettime().
  406. have_rt=yes
  407. fi
  408. AC_SEARCH_LIBS(pthread_create, [pthread])
  409. AC_SEARCH_LIBS(pthread_detach, [pthread])
  410. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  411. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  412. AC_CHECK_FUNCS(
  413. _NSGetEnviron \
  414. RtlSecureZeroMemory \
  415. SecureZeroMemory \
  416. accept4 \
  417. backtrace \
  418. backtrace_symbols_fd \
  419. eventfd \
  420. explicit_bzero \
  421. timingsafe_memcmp \
  422. flock \
  423. ftime \
  424. get_current_dir_name \
  425. getaddrinfo \
  426. getifaddrs \
  427. getpass \
  428. getrlimit \
  429. gettimeofday \
  430. gmtime_r \
  431. gnu_get_libc_version \
  432. htonll \
  433. inet_aton \
  434. ioctl \
  435. issetugid \
  436. llround \
  437. localtime_r \
  438. lround \
  439. mach_approximate_time \
  440. memmem \
  441. memset_s \
  442. pipe \
  443. pipe2 \
  444. prctl \
  445. readpassphrase \
  446. rint \
  447. sigaction \
  448. socketpair \
  449. statvfs \
  450. strlcat \
  451. strlcpy \
  452. strnlen \
  453. strptime \
  454. strtok_r \
  455. strtoull \
  456. sysconf \
  457. sysctl \
  458. truncate \
  459. uname \
  460. usleep \
  461. vasprintf \
  462. _vscprintf
  463. )
  464. # Apple messed up when they added two functions functions in Sierra: they
  465. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  466. # checks. So we should only probe for those functions if we are sure that we
  467. # are not targetting OSX 10.11 or earlier.
  468. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  469. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  470. #ifdef __APPLE__
  471. # include <AvailabilityMacros.h>
  472. # ifndef MAC_OS_X_VERSION_10_12
  473. # define MAC_OS_X_VERSION_10_12 101200
  474. # endif
  475. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  476. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  477. # error "Running on Mac OSX 10.11 or earlier"
  478. # endif
  479. # endif
  480. #endif
  481. ]], [[]])],
  482. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  483. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  484. if test "$on_macos_pre_10_12" = "no"; then
  485. AC_CHECK_FUNCS(
  486. clock_gettime \
  487. getentropy \
  488. )
  489. fi
  490. if test "$bwin32" != "true"; then
  491. AC_CHECK_HEADERS(pthread.h)
  492. AC_CHECK_FUNCS(pthread_create)
  493. AC_CHECK_FUNCS(pthread_condattr_setclock)
  494. fi
  495. if test "$bwin32" = "true"; then
  496. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  497. #include <windows.h>
  498. #include <conio.h>
  499. #include <wchar.h>
  500. ])
  501. fi
  502. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  503. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  504. dnl ------------------------------------------------------
  505. dnl Where do you live, libevent? And how do we call you?
  506. if test "$bwin32" = "true"; then
  507. TOR_LIB_WS32=-lws2_32
  508. TOR_LIB_IPHLPAPI=-liphlpapi
  509. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  510. # think it's actually necessary.
  511. TOR_LIB_GDI=-lgdi32
  512. TOR_LIB_USERENV=-luserenv
  513. else
  514. TOR_LIB_WS32=
  515. TOR_LIB_GDI=
  516. TOR_LIB_USERENV=
  517. fi
  518. AC_SUBST(TOR_LIB_WS32)
  519. AC_SUBST(TOR_LIB_GDI)
  520. AC_SUBST(TOR_LIB_IPHLPAPI)
  521. AC_SUBST(TOR_LIB_USERENV)
  522. tor_libevent_pkg_redhat="libevent"
  523. tor_libevent_pkg_debian="libevent-dev"
  524. tor_libevent_devpkg_redhat="libevent-devel"
  525. tor_libevent_devpkg_debian="libevent-dev"
  526. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  527. dnl linking for static builds.
  528. STATIC_LIBEVENT_FLAGS=""
  529. if test "$enable_static_libevent" = "yes"; then
  530. if test "$have_rt" = "yes"; then
  531. STATIC_LIBEVENT_FLAGS=" -lrt "
  532. fi
  533. fi
  534. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  535. #ifdef _WIN32
  536. #include <winsock2.h>
  537. #endif
  538. #include <sys/time.h>
  539. #include <sys/types.h>
  540. #include <event2/event.h>], [
  541. #ifdef _WIN32
  542. #include <winsock2.h>
  543. #endif
  544. struct event_base;
  545. struct event_base *event_base_new(void);],
  546. [
  547. #ifdef _WIN32
  548. {WSADATA d; WSAStartup(0x101,&d); }
  549. #endif
  550. event_base_free(event_base_new());
  551. ], [--with-libevent-dir], [/opt/libevent])
  552. dnl Determine the incantation needed to link libevent.
  553. save_LIBS="$LIBS"
  554. save_LDFLAGS="$LDFLAGS"
  555. save_CPPFLAGS="$CPPFLAGS"
  556. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  557. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  558. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  559. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  560. if test "$enable_static_libevent" = "yes"; then
  561. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  562. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  563. else
  564. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  565. fi
  566. else
  567. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  568. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  569. 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"))
  570. if test "$ac_cv_search_event_new" != "none required"; then
  571. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  572. fi
  573. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  574. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  575. fi
  576. else
  577. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  578. fi
  579. fi
  580. dnl Now check for particular libevent functions.
  581. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  582. evutil_secure_rng_add_bytes \
  583. ])
  584. LIBS="$save_LIBS"
  585. LDFLAGS="$save_LDFLAGS"
  586. CPPFLAGS="$save_CPPFLAGS"
  587. dnl Check that libevent is at least at version 2.0.10, the first stable
  588. dnl release of its series
  589. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  590. AC_MSG_CHECKING([whether Libevent is new enough])
  591. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  592. #include <event2/event.h>
  593. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  594. #error
  595. int x = y(zz);
  596. #else
  597. int x = 1;
  598. #endif
  599. ])], [ AC_MSG_RESULT([yes]) ],
  600. [ AC_MSG_RESULT([no])
  601. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  602. LIBS="$save_LIBS"
  603. LDFLAGS="$save_LDFLAGS"
  604. CPPFLAGS="$save_CPPFLAGS"
  605. AC_SUBST(TOR_LIBEVENT_LIBS)
  606. dnl ------------------------------------------------------
  607. dnl Where do you live, libm?
  608. dnl On some platforms (Haiku/BeOS) the math library is
  609. dnl part of libroot. In which case don't link against lm
  610. TOR_LIB_MATH=""
  611. save_LIBS="$LIBS"
  612. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  613. if test "$ac_cv_search_pow" != "none required"; then
  614. TOR_LIB_MATH="$ac_cv_search_pow"
  615. fi
  616. LIBS="$save_LIBS"
  617. AC_SUBST(TOR_LIB_MATH)
  618. dnl ------------------------------------------------------
  619. dnl Where do you live, openssl? And how do we call you?
  620. tor_openssl_pkg_redhat="openssl"
  621. tor_openssl_pkg_debian="libssl-dev"
  622. tor_openssl_devpkg_redhat="openssl-devel"
  623. tor_openssl_devpkg_debian="libssl-dev"
  624. ALT_openssl_WITHVAL=""
  625. AC_ARG_WITH(ssl-dir,
  626. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  627. [
  628. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  629. ALT_openssl_WITHVAL="$withval"
  630. fi
  631. ])
  632. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  633. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  634. [#include <openssl/ssl.h>],
  635. [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
  636. [TLSv1_1_method();], [],
  637. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  638. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  639. if test "$enable_static_openssl" = "yes"; then
  640. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  641. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  642. else
  643. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  644. fi
  645. else
  646. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  647. fi
  648. AC_SUBST(TOR_OPENSSL_LIBS)
  649. dnl Now check for particular openssl functions.
  650. save_LIBS="$LIBS"
  651. save_LDFLAGS="$LDFLAGS"
  652. save_CPPFLAGS="$CPPFLAGS"
  653. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  654. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  655. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  656. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  657. #include <openssl/opensslv.h>
  658. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  659. #error "too old"
  660. #endif
  661. ]], [[]])],
  662. [ : ],
  663. [ 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.]) ])
  664. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  665. #include <openssl/opensslv.h>
  666. #include <openssl/evp.h>
  667. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  668. #error "no ECC"
  669. #endif
  670. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  671. #error "curves unavailable"
  672. #endif
  673. ]], [[]])],
  674. [ : ],
  675. [ 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.]) ])
  676. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  677. [#include <openssl/ssl.h>
  678. ])
  679. AC_CHECK_FUNCS([ \
  680. SSL_SESSION_get_master_key \
  681. SSL_get_server_random \
  682. SSL_get_client_ciphers \
  683. SSL_get_client_random \
  684. SSL_CIPHER_find \
  685. TLS_method
  686. ])
  687. dnl Check if OpenSSL has scrypt implementation.
  688. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  689. dnl Check if OpenSSL structures are opaque
  690. AC_CHECK_MEMBERS([SSL.state], , ,
  691. [#include <openssl/ssl.h>
  692. ])
  693. dnl Define the set of checks for KIST scheduler support.
  694. AC_DEFUN([CHECK_KIST_SUPPORT],[
  695. dnl KIST needs struct tcp_info and for certain members to exist.
  696. AC_CHECK_MEMBERS(
  697. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  698. , ,[[#include <netinet/tcp.h>]])
  699. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  700. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  701. #include <linux/sockios.h>
  702. #ifndef SIOCOUTQNSD
  703. #error
  704. #endif
  705. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  706. if test "x$have_siocoutqnsd" = "xyes"; then
  707. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  708. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  709. have_kist_support=yes
  710. fi
  711. fi
  712. fi
  713. ])
  714. dnl Now, trigger the check.
  715. CHECK_KIST_SUPPORT
  716. AS_IF([test "x$have_kist_support" = "xyes"],
  717. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  718. on this system])],
  719. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  720. LIBS="$save_LIBS"
  721. LDFLAGS="$save_LDFLAGS"
  722. CPPFLAGS="$save_CPPFLAGS"
  723. dnl ------------------------------------------------------
  724. dnl Where do you live, zlib? And how do we call you?
  725. tor_zlib_pkg_redhat="zlib"
  726. tor_zlib_pkg_debian="zlib1g"
  727. tor_zlib_devpkg_redhat="zlib-devel"
  728. tor_zlib_devpkg_debian="zlib1g-dev"
  729. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  730. [#include <zlib.h>],
  731. [const char * zlibVersion(void);],
  732. [zlibVersion();], [--with-zlib-dir],
  733. [/opt/zlib])
  734. if test "$enable_static_zlib" = "yes"; then
  735. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  736. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  737. using --enable-static-zlib")
  738. else
  739. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  740. fi
  741. else
  742. TOR_ZLIB_LIBS="-lz"
  743. fi
  744. AC_SUBST(TOR_ZLIB_LIBS)
  745. dnl ------------------------------------------------------
  746. dnl Where we do we find lzma?
  747. AC_ARG_ENABLE(lzma,
  748. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  749. [case "${enableval}" in
  750. "yes") lzma=true ;;
  751. "no") lzma=false ;;
  752. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  753. esac], [lzma=auto])
  754. if test "x$enable_lzma" = "xno"; then
  755. have_lzma=no;
  756. else
  757. PKG_CHECK_MODULES([LZMA],
  758. [liblzma],
  759. have_lzma=yes,
  760. have_lzma=no)
  761. if test "x$have_lzma" = "xno" ; then
  762. AC_MSG_WARN([Unable to find liblzma.])
  763. fi
  764. fi
  765. if test "x$have_lzma" = "xyes"; then
  766. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  767. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  768. TOR_LZMA_LIBS="${LZMA_LIBS}"
  769. fi
  770. AC_SUBST(TOR_LZMA_CFLAGS)
  771. AC_SUBST(TOR_LZMA_LIBS)
  772. dnl ------------------------------------------------------
  773. dnl Where we do we find zstd?
  774. AC_ARG_ENABLE(zstd,
  775. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  776. [case "${enableval}" in
  777. "yes") zstd=true ;;
  778. "no") zstd=false ;;
  779. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  780. esac], [zstd=auto])
  781. if test "x$enable_zstd" = "xno"; then
  782. have_zstd=no;
  783. else
  784. PKG_CHECK_MODULES([ZSTD],
  785. [libzstd >= 1.1],
  786. have_zstd=yes,
  787. have_zstd=no)
  788. if test "x$have_zstd" = "xno" ; then
  789. AC_MSG_WARN([Unable to find libzstd.])
  790. fi
  791. fi
  792. if test "x$have_zstd" = "xyes"; then
  793. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  794. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  795. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  796. fi
  797. AC_SUBST(TOR_ZSTD_CFLAGS)
  798. AC_SUBST(TOR_ZSTD_LIBS)
  799. dnl ----------------------------------------------------------------------
  800. dnl Check if libcap is available for capabilities.
  801. tor_cap_pkg_debian="libcap2"
  802. tor_cap_pkg_redhat="libcap"
  803. tor_cap_devpkg_debian="libcap-dev"
  804. tor_cap_devpkg_redhat="libcap-devel"
  805. AC_CHECK_LIB([cap], [cap_init], [],
  806. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  807. )
  808. AC_CHECK_FUNCS(cap_set_proc)
  809. dnl ---------------------------------------------------------------------
  810. dnl Now that we know about our major libraries, we can check for compiler
  811. dnl and linker hardening options. We need to do this with the libraries known,
  812. dnl since sometimes the linker will like an option but not be willing to
  813. dnl use it with a build of a library.
  814. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  815. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  816. CFLAGS_FTRAPV=
  817. CFLAGS_FWRAPV=
  818. CFLAGS_ASAN=
  819. CFLAGS_UBSAN=
  820. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  821. #if !defined(__clang__)
  822. #error
  823. #endif])], have_clang=yes, have_clang=no)
  824. if test "x$enable_gcc_hardening" != "xno"; then
  825. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  826. if test "x$have_clang" = "xyes"; then
  827. TOR_CHECK_CFLAGS(-Qunused-arguments)
  828. fi
  829. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  830. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  831. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  832. m4_ifdef([AS_VAR_IF],[
  833. AS_VAR_IF(can_compile, [yes],
  834. AS_VAR_IF(can_link, [yes],
  835. [],
  836. 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.)]))
  837. )])
  838. AS_VAR_POPDEF([can_link])
  839. AS_VAR_POPDEF([can_compile])
  840. TOR_CHECK_CFLAGS(-Wstack-protector)
  841. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  842. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  843. TOR_CHECK_CFLAGS(-fPIE)
  844. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  845. fi
  846. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  847. fi
  848. if test "$fragile_hardening" = "yes"; then
  849. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  850. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  851. 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.])
  852. fi
  853. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  854. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  855. fi
  856. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  857. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  858. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  859. fi
  860. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  861. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  862. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  863. fi
  864. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  865. fi
  866. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  867. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  868. mulodi_fixes_ftrapv=no
  869. if test "$have_clang" = "yes"; then
  870. saved_CFLAGS="$CFLAGS"
  871. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  872. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  873. AC_LINK_IFELSE([
  874. AC_LANG_SOURCE([[
  875. #include <stdint.h>
  876. #include <stdlib.h>
  877. int main(int argc, char **argv)
  878. {
  879. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  880. * (int64_t)atoi(argv[3]);
  881. return x == 9;
  882. } ]])],
  883. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  884. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  885. if test "$ftrapv_can_link" = "no"; then
  886. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  887. AC_LINK_IFELSE([
  888. AC_LANG_SOURCE([[
  889. #include <stdint.h>
  890. #include <stdlib.h>
  891. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  892. *overflow=0;
  893. return a;
  894. }
  895. int main(int argc, char **argv)
  896. {
  897. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  898. * (int64_t)atoi(argv[3]);
  899. return x == 9;
  900. } ]])],
  901. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  902. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  903. fi
  904. CFLAGS="$saved_CFLAGS"
  905. fi
  906. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  907. dnl These cflags add bunches of branches, and we haven't been able to
  908. dnl persuade ourselves that they're suitable for code that needs to be
  909. dnl constant time.
  910. AC_SUBST(CFLAGS_BUGTRAP)
  911. dnl These cflags are variant ones sutable for code that needs to be
  912. dnl constant-time.
  913. AC_SUBST(CFLAGS_CONSTTIME)
  914. if test "x$enable_linker_hardening" != "xno"; then
  915. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  916. fi
  917. # For backtrace support
  918. TOR_CHECK_LDFLAGS(-rdynamic)
  919. dnl ------------------------------------------------------
  920. dnl Now see if we have a -fomit-frame-pointer compiler option.
  921. saved_CFLAGS="$CFLAGS"
  922. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  923. F_OMIT_FRAME_POINTER=''
  924. if test "$saved_CFLAGS" != "$CFLAGS"; then
  925. if test "$fragile_hardening" = "yes"; then
  926. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  927. fi
  928. fi
  929. CFLAGS="$saved_CFLAGS"
  930. AC_SUBST(F_OMIT_FRAME_POINTER)
  931. dnl ------------------------------------------------------
  932. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  933. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  934. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  935. dnl code will work.
  936. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  937. dnl ============================================================
  938. dnl Check for libseccomp
  939. if test "x$enable_seccomp" != "xno"; then
  940. AC_CHECK_HEADERS([seccomp.h])
  941. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  942. fi
  943. dnl ============================================================
  944. dnl Check for libscrypt
  945. if test "x$enable_libscrypt" != "xno"; then
  946. AC_CHECK_HEADERS([libscrypt.h])
  947. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  948. AC_CHECK_FUNCS([libscrypt_scrypt])
  949. fi
  950. dnl ============================================================
  951. dnl We need an implementation of curve25519.
  952. dnl set these defaults.
  953. build_curve25519_donna=no
  954. build_curve25519_donna_c64=no
  955. use_curve25519_donna=no
  956. use_curve25519_nacl=no
  957. CURVE25519_LIBS=
  958. dnl The best choice is using curve25519-donna-c64, but that requires
  959. dnl that we
  960. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  961. tor_cv_can_use_curve25519_donna_c64,
  962. [AC_RUN_IFELSE(
  963. [AC_LANG_PROGRAM([dnl
  964. #include <stdint.h>
  965. typedef unsigned uint128_t __attribute__((mode(TI)));
  966. int func(uint64_t a, uint64_t b) {
  967. uint128_t c = ((uint128_t)a) * b;
  968. int ok = ((uint64_t)(c>>96)) == 522859 &&
  969. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  970. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  971. (((uint64_t)(c))&0xffffffffL) == 0;
  972. return ok;
  973. }
  974. ], [dnl
  975. int ok = func( ((uint64_t)2000000000) * 1000000000,
  976. ((uint64_t)1234567890) << 24);
  977. return !ok;
  978. ])],
  979. [tor_cv_can_use_curve25519_donna_c64=yes],
  980. [tor_cv_can_use_curve25519_donna_c64=no],
  981. [AC_LINK_IFELSE(
  982. [AC_LANG_PROGRAM([dnl
  983. #include <stdint.h>
  984. typedef unsigned uint128_t __attribute__((mode(TI)));
  985. int func(uint64_t a, uint64_t b) {
  986. uint128_t c = ((uint128_t)a) * b;
  987. int ok = ((uint64_t)(c>>96)) == 522859 &&
  988. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  989. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  990. (((uint64_t)(c))&0xffffffffL) == 0;
  991. return ok;
  992. }
  993. ], [dnl
  994. int ok = func( ((uint64_t)2000000000) * 1000000000,
  995. ((uint64_t)1234567890) << 24);
  996. return !ok;
  997. ])],
  998. [tor_cv_can_use_curve25519_donna_c64=cross],
  999. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1000. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1001. nacl/crypto_scalarmult_curve25519.h])
  1002. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1003. tor_cv_can_use_curve25519_nacl,
  1004. [tor_saved_LIBS="$LIBS"
  1005. LIBS="$LIBS -lnacl"
  1006. AC_LINK_IFELSE(
  1007. [AC_LANG_PROGRAM([dnl
  1008. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1009. #include <crypto_scalarmult_curve25519.h>
  1010. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1011. #include <nacl/crypto_scalarmult_curve25519.h>
  1012. #endif
  1013. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1014. #error Hey, this is the reference implementation! That's not fast.
  1015. #endif
  1016. ], [
  1017. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1018. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1019. [tor_cv_can_use_curve25519_nacl=no])
  1020. LIBS="$tor_saved_LIBS" ])
  1021. dnl Okay, now we need to figure out which one to actually use. Fall back
  1022. dnl to curve25519-donna.c
  1023. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1024. build_curve25519_donna_c64=yes
  1025. use_curve25519_donna=yes
  1026. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1027. use_curve25519_nacl=yes
  1028. CURVE25519_LIBS=-lnacl
  1029. else
  1030. build_curve25519_donna=yes
  1031. use_curve25519_donna=yes
  1032. fi
  1033. if test "x$use_curve25519_donna" = "xyes"; then
  1034. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1035. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1036. fi
  1037. if test "x$use_curve25519_nacl" = "xyes"; then
  1038. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1039. [Defined if we should use a curve25519 from nacl])
  1040. fi
  1041. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1042. test "x$build_curve25519_donna" = "xyes")
  1043. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1044. test "x$build_curve25519_donna_c64" = "xyes")
  1045. AC_SUBST(CURVE25519_LIBS)
  1046. dnl Make sure to enable support for large off_t if available.
  1047. AC_SYS_LARGEFILE
  1048. AC_CHECK_HEADERS([assert.h \
  1049. errno.h \
  1050. fcntl.h \
  1051. signal.h \
  1052. string.h \
  1053. sys/capability.h \
  1054. sys/fcntl.h \
  1055. sys/stat.h \
  1056. sys/time.h \
  1057. sys/types.h \
  1058. time.h \
  1059. unistd.h \
  1060. arpa/inet.h \
  1061. crt_externs.h \
  1062. execinfo.h \
  1063. gnu/libc-version.h \
  1064. grp.h \
  1065. ifaddrs.h \
  1066. inttypes.h \
  1067. limits.h \
  1068. linux/types.h \
  1069. machine/limits.h \
  1070. malloc.h \
  1071. malloc/malloc.h \
  1072. malloc_np.h \
  1073. netdb.h \
  1074. netinet/in.h \
  1075. netinet/in6.h \
  1076. pwd.h \
  1077. readpassphrase.h \
  1078. stdint.h \
  1079. stdatomic.h \
  1080. sys/eventfd.h \
  1081. sys/file.h \
  1082. sys/ioctl.h \
  1083. sys/limits.h \
  1084. sys/mman.h \
  1085. sys/param.h \
  1086. sys/prctl.h \
  1087. sys/random.h \
  1088. sys/resource.h \
  1089. sys/select.h \
  1090. sys/socket.h \
  1091. sys/statvfs.h \
  1092. sys/syscall.h \
  1093. sys/sysctl.h \
  1094. sys/syslimits.h \
  1095. sys/time.h \
  1096. sys/types.h \
  1097. sys/un.h \
  1098. sys/utime.h \
  1099. sys/wait.h \
  1100. syslog.h \
  1101. utime.h])
  1102. AC_CHECK_HEADERS(sys/param.h)
  1103. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1104. [#ifdef HAVE_SYS_TYPES_H
  1105. #include <sys/types.h>
  1106. #endif
  1107. #ifdef HAVE_SYS_SOCKET_H
  1108. #include <sys/socket.h>
  1109. #endif])
  1110. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1111. [#ifdef HAVE_SYS_TYPES_H
  1112. #include <sys/types.h>
  1113. #endif
  1114. #ifdef HAVE_SYS_SOCKET_H
  1115. #include <sys/socket.h>
  1116. #endif
  1117. #ifdef HAVE_NET_IF_H
  1118. #include <net/if.h>
  1119. #endif
  1120. #ifdef HAVE_NETINET_IN_H
  1121. #include <netinet/in.h>
  1122. #endif])
  1123. AC_CHECK_HEADERS(linux/if.h,[],[],
  1124. [
  1125. #ifdef HAVE_SYS_SOCKET_H
  1126. #include <sys/socket.h>
  1127. #endif
  1128. ])
  1129. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1130. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1131. [#ifdef HAVE_SYS_TYPES_H
  1132. #include <sys/types.h>
  1133. #endif
  1134. #ifdef HAVE_SYS_SOCKET_H
  1135. #include <sys/socket.h>
  1136. #endif
  1137. #ifdef HAVE_LIMITS_H
  1138. #include <limits.h>
  1139. #endif
  1140. #ifdef HAVE_LINUX_TYPES_H
  1141. #include <linux/types.h>
  1142. #endif
  1143. #ifdef HAVE_NETINET_IN6_H
  1144. #include <netinet/in6.h>
  1145. #endif
  1146. #ifdef HAVE_NETINET_IN_H
  1147. #include <netinet/in.h>
  1148. #endif])
  1149. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1150. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1151. [#ifdef HAVE_SYS_TYPES_H
  1152. #include <sys/types.h>
  1153. #endif
  1154. #ifdef HAVE_SYS_SOCKET_H
  1155. #include <sys/socket.h>
  1156. #endif
  1157. #ifdef HAVE_LIMITS_H
  1158. #include <limits.h>
  1159. #endif
  1160. #ifdef HAVE_LINUX_TYPES_H
  1161. #include <linux/types.h>
  1162. #endif
  1163. #ifdef HAVE_NETINET_IN6_H
  1164. #include <netinet/in6.h>
  1165. #endif
  1166. #ifdef HAVE_NETINET_IN_H
  1167. #include <netinet/in.h>
  1168. #endif
  1169. #ifdef HAVE_LINUX_IF_H
  1170. #include <linux/if.h>
  1171. #endif])
  1172. transparent_ok=0
  1173. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1174. transparent_ok=1
  1175. fi
  1176. if test "x$linux_netfilter_ipv4" = "x1"; then
  1177. transparent_ok=1
  1178. fi
  1179. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1180. transparent_ok=1
  1181. fi
  1182. if test "x$transparent_ok" = "x1"; then
  1183. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1184. else
  1185. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1186. fi
  1187. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1188. [#ifdef HAVE_SYS_TYPES_H
  1189. #include <sys/types.h>
  1190. #endif
  1191. #ifdef HAVE_SYS_TIME_H
  1192. #include <sys/time.h>
  1193. #endif])
  1194. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1195. dnl Watch out.
  1196. AC_CHECK_SIZEOF(int8_t)
  1197. AC_CHECK_SIZEOF(int16_t)
  1198. AC_CHECK_SIZEOF(int32_t)
  1199. AC_CHECK_SIZEOF(int64_t)
  1200. AC_CHECK_SIZEOF(uint8_t)
  1201. AC_CHECK_SIZEOF(uint16_t)
  1202. AC_CHECK_SIZEOF(uint32_t)
  1203. AC_CHECK_SIZEOF(uint64_t)
  1204. AC_CHECK_SIZEOF(intptr_t)
  1205. AC_CHECK_SIZEOF(uintptr_t)
  1206. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1207. AC_CHECK_SIZEOF(char)
  1208. AC_CHECK_SIZEOF(short)
  1209. AC_CHECK_SIZEOF(int)
  1210. AC_CHECK_SIZEOF(long)
  1211. AC_CHECK_SIZEOF(long long)
  1212. AC_CHECK_SIZEOF(__int64)
  1213. AC_CHECK_SIZEOF(void *)
  1214. AC_CHECK_SIZEOF(time_t)
  1215. AC_CHECK_SIZEOF(size_t)
  1216. AC_CHECK_SIZEOF(pid_t)
  1217. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1218. AC_PC_FROM_UCONTEXT([:])
  1219. dnl used to include sockaddr_storage, but everybody has that.
  1220. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1221. [#ifdef HAVE_SYS_TYPES_H
  1222. #include <sys/types.h>
  1223. #endif
  1224. #ifdef HAVE_NETINET_IN_H
  1225. #include <netinet/in.h>
  1226. #endif
  1227. #ifdef HAVE_NETINET_IN6_H
  1228. #include <netinet/in6.h>
  1229. #endif
  1230. #ifdef HAVE_SYS_SOCKET_H
  1231. #include <sys/socket.h>
  1232. #endif
  1233. #ifdef _WIN32
  1234. #define _WIN32_WINNT 0x0501
  1235. #define WIN32_LEAN_AND_MEAN
  1236. #include <winsock2.h>
  1237. #include <ws2tcpip.h>
  1238. #endif
  1239. ])
  1240. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1241. [#ifdef HAVE_SYS_TYPES_H
  1242. #include <sys/types.h>
  1243. #endif
  1244. #ifdef HAVE_NETINET_IN_H
  1245. #include <netinet/in.h>
  1246. #endif
  1247. #ifdef HAVE_NETINET_IN6_H
  1248. #include <netinet/in6.h>
  1249. #endif
  1250. #ifdef HAVE_SYS_SOCKET_H
  1251. #include <sys/socket.h>
  1252. #endif
  1253. #ifdef _WIN32
  1254. #define _WIN32_WINNT 0x0501
  1255. #define WIN32_LEAN_AND_MEAN
  1256. #include <winsock2.h>
  1257. #include <ws2tcpip.h>
  1258. #endif
  1259. ])
  1260. AC_CHECK_TYPES([rlim_t], , ,
  1261. [#ifdef HAVE_SYS_TYPES_H
  1262. #include <sys/types.h>
  1263. #endif
  1264. #ifdef HAVE_SYS_TIME_H
  1265. #include <sys/time.h>
  1266. #endif
  1267. #ifdef HAVE_SYS_RESOURCE_H
  1268. #include <sys/resource.h>
  1269. #endif
  1270. ])
  1271. AX_CHECK_SIGN([time_t],
  1272. [ : ],
  1273. [ : ], [
  1274. #ifdef HAVE_SYS_TYPES_H
  1275. #include <sys/types.h>
  1276. #endif
  1277. #ifdef HAVE_SYS_TIME_H
  1278. #include <sys/time.h>
  1279. #endif
  1280. #ifdef HAVE_TIME_H
  1281. #include <time.h>
  1282. #endif
  1283. ])
  1284. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1285. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1286. fi
  1287. AX_CHECK_SIGN([size_t],
  1288. [ tor_cv_size_t_signed=yes ],
  1289. [ tor_cv_size_t_signed=no ], [
  1290. #ifdef HAVE_SYS_TYPES_H
  1291. #include <sys/types.h>
  1292. #endif
  1293. ])
  1294. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1295. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1296. fi
  1297. AX_CHECK_SIGN([enum always],
  1298. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1299. [ : ], [
  1300. enum always { AAA, BBB, CCC };
  1301. ])
  1302. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1303. #ifdef HAVE_SYS_SOCKET_H
  1304. #include <sys/socket.h>
  1305. #endif
  1306. ])
  1307. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1308. AC_CHECK_SIZEOF(cell_t)
  1309. # Now make sure that NULL can be represented as zero bytes.
  1310. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1311. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1312. [[#include <stdlib.h>
  1313. #include <string.h>
  1314. #include <stdio.h>
  1315. #ifdef HAVE_STDDEF_H
  1316. #include <stddef.h>
  1317. #endif
  1318. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1319. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1320. [tor_cv_null_is_zero=yes],
  1321. [tor_cv_null_is_zero=no],
  1322. [tor_cv_null_is_zero=cross])])
  1323. if test "$tor_cv_null_is_zero" = "cross"; then
  1324. # Cross-compiling; let's hope that the target isn't raving mad.
  1325. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1326. fi
  1327. if test "$tor_cv_null_is_zero" != "no"; then
  1328. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1329. [Define to 1 iff memset(0) sets pointers to NULL])
  1330. fi
  1331. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1332. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1333. [[#include <stdlib.h>
  1334. #include <string.h>
  1335. #include <stdio.h>
  1336. #ifdef HAVE_STDDEF_H
  1337. #include <stddef.h>
  1338. #endif
  1339. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1340. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1341. [tor_cv_dbl0_is_zero=yes],
  1342. [tor_cv_dbl0_is_zero=no],
  1343. [tor_cv_dbl0_is_zero=cross])])
  1344. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1345. # Cross-compiling; let's hope that the target isn't raving mad.
  1346. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1347. fi
  1348. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1349. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1350. [Define to 1 iff memset(0) sets doubles to 0.0])
  1351. fi
  1352. # And what happens when we malloc zero?
  1353. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1354. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1355. [[#include <stdlib.h>
  1356. #include <string.h>
  1357. #include <stdio.h>
  1358. #ifdef HAVE_STDDEF_H
  1359. #include <stddef.h>
  1360. #endif
  1361. int main () { return malloc(0)?0:1; }]])],
  1362. [tor_cv_malloc_zero_works=yes],
  1363. [tor_cv_malloc_zero_works=no],
  1364. [tor_cv_malloc_zero_works=cross])])
  1365. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1366. # Cross-compiling; let's hope that the target isn't raving mad.
  1367. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1368. fi
  1369. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1370. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1371. [Define to 1 iff malloc(0) returns a pointer])
  1372. fi
  1373. # whether we seem to be in a 2s-complement world.
  1374. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1375. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1376. [[int main () { int problem = ((-99) != (~99)+1);
  1377. return problem ? 1 : 0; }]])],
  1378. [tor_cv_twos_complement=yes],
  1379. [tor_cv_twos_complement=no],
  1380. [tor_cv_twos_complement=cross])])
  1381. if test "$tor_cv_twos_complement" = "cross"; then
  1382. # Cross-compiling; let's hope that the target isn't raving mad.
  1383. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1384. fi
  1385. if test "$tor_cv_twos_complement" != "no"; then
  1386. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1387. [Define to 1 iff we represent negative integers with
  1388. two's complement])
  1389. fi
  1390. # What does shifting a negative value do?
  1391. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1392. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1393. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1394. [tor_cv_sign_extend=yes],
  1395. [tor_cv_sign_extend=no],
  1396. [tor_cv_sign_extend=cross])])
  1397. if test "$tor_cv_sign_extend" = "cross"; then
  1398. # Cross-compiling; let's hope that the target isn't raving mad.
  1399. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1400. fi
  1401. if test "$tor_cv_sign_extend" != "no"; then
  1402. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1403. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1404. fi
  1405. # Is uint8_t the same type as unsigned char?
  1406. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1407. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1408. #include <stdint.h>
  1409. extern uint8_t c;
  1410. unsigned char c;]])],
  1411. [tor_cv_uint8_uchar=yes],
  1412. [tor_cv_uint8_uchar=no],
  1413. [tor_cv_uint8_uchar=cross])])
  1414. if test "$tor_cv_uint8_uchar" = "cross"; then
  1415. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1416. fi
  1417. if test "$tor_cv_uint8_uchar" = "no"; then
  1418. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1419. fi
  1420. # Whether we should use the dmalloc memory allocation debugging library.
  1421. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1422. AC_ARG_WITH(dmalloc,
  1423. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1424. [if [[ "$withval" = "yes" ]]; then
  1425. dmalloc=1
  1426. AC_MSG_RESULT(yes)
  1427. else
  1428. dmalloc=1
  1429. AC_MSG_RESULT(no)
  1430. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1431. )
  1432. if [[ $dmalloc -eq 1 ]]; then
  1433. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1434. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1435. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1436. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1437. fi
  1438. AC_ARG_WITH(tcmalloc,
  1439. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1440. [ tcmalloc=yes ], [ tcmalloc=no ])
  1441. if test "x$tcmalloc" = "xyes"; then
  1442. LDFLAGS="-ltcmalloc $LDFLAGS"
  1443. fi
  1444. using_custom_malloc=no
  1445. if test "x$enable_openbsd_malloc" = "xyes"; then
  1446. using_custom_malloc=yes
  1447. fi
  1448. if test "x$tcmalloc" = "xyes"; then
  1449. using_custom_malloc=yes
  1450. fi
  1451. if test "$using_custom_malloc" = "no"; then
  1452. AC_CHECK_FUNCS(mallinfo)
  1453. fi
  1454. # By default, we're going to assume we don't have mlockall()
  1455. # bionic and other platforms have various broken mlockall subsystems.
  1456. # Some systems don't have a working mlockall, some aren't linkable,
  1457. # and some have it but don't declare it.
  1458. AC_CHECK_FUNCS(mlockall)
  1459. AC_CHECK_DECLS([mlockall], , , [
  1460. #ifdef HAVE_SYS_MMAN_H
  1461. #include <sys/mman.h>
  1462. #endif])
  1463. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1464. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1465. # using macros
  1466. AC_CHECK_DECLS([getpagesize], , , [
  1467. #ifdef HAVE_UNISTD_H
  1468. #include <unistd.h>
  1469. #endif])
  1470. # Allow user to specify an alternate syslog facility
  1471. AC_ARG_WITH(syslog-facility,
  1472. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1473. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1474. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1475. AC_SUBST(LOGFACILITY)
  1476. # Check if we have getresuid and getresgid
  1477. AC_CHECK_FUNCS(getresuid getresgid)
  1478. # Check for gethostbyname_r in all its glorious incompatible versions.
  1479. # (This logic is based on that in Python's configure.in)
  1480. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1481. [Define this if you have any gethostbyname_r()])
  1482. AC_CHECK_FUNC(gethostbyname_r, [
  1483. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1484. OLD_CFLAGS=$CFLAGS
  1485. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1486. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1487. #include <netdb.h>
  1488. ]], [[
  1489. char *cp1, *cp2;
  1490. struct hostent *h1, *h2;
  1491. int i1, i2;
  1492. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1493. ]])],[
  1494. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1495. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1496. [Define this if gethostbyname_r takes 6 arguments])
  1497. AC_MSG_RESULT(6)
  1498. ], [
  1499. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1500. #include <netdb.h>
  1501. ]], [[
  1502. char *cp1, *cp2;
  1503. struct hostent *h1;
  1504. int i1, i2;
  1505. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1506. ]])], [
  1507. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1508. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1509. [Define this if gethostbyname_r takes 5 arguments])
  1510. AC_MSG_RESULT(5)
  1511. ], [
  1512. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1513. #include <netdb.h>
  1514. ]], [[
  1515. char *cp1;
  1516. struct hostent *h1;
  1517. struct hostent_data hd;
  1518. (void) gethostbyname_r(cp1,h1,&hd);
  1519. ]])], [
  1520. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1521. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1522. [Define this if gethostbyname_r takes 3 arguments])
  1523. AC_MSG_RESULT(3)
  1524. ], [
  1525. AC_MSG_RESULT(0)
  1526. ])
  1527. ])
  1528. ])
  1529. CFLAGS=$OLD_CFLAGS
  1530. ])
  1531. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1532. tor_cv_have_func_macro,
  1533. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1534. #include <stdio.h>
  1535. int main(int c, char **v) { puts(__func__); }])],
  1536. tor_cv_have_func_macro=yes,
  1537. tor_cv_have_func_macro=no))
  1538. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1539. tor_cv_have_FUNC_macro,
  1540. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1541. #include <stdio.h>
  1542. int main(int c, char **v) { puts(__FUNC__); }])],
  1543. tor_cv_have_FUNC_macro=yes,
  1544. tor_cv_have_FUNC_macro=no))
  1545. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1546. tor_cv_have_FUNCTION_macro,
  1547. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1548. #include <stdio.h>
  1549. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1550. tor_cv_have_FUNCTION_macro=yes,
  1551. tor_cv_have_FUNCTION_macro=no))
  1552. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1553. tor_cv_have_environ_declared,
  1554. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1555. #ifdef HAVE_UNISTD_H
  1556. #include <unistd.h>
  1557. #endif
  1558. #include <stdlib.h>
  1559. int main(int c, char **v) { char **t = environ; }])],
  1560. tor_cv_have_environ_declared=yes,
  1561. tor_cv_have_environ_declared=no))
  1562. if test "$tor_cv_have_func_macro" = "yes"; then
  1563. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1564. fi
  1565. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1566. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1567. fi
  1568. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1569. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1570. [Defined if the compiler supports __FUNCTION__])
  1571. fi
  1572. if test "$tor_cv_have_environ_declared" = "yes"; then
  1573. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1574. [Defined if we have extern char **environ already declared])
  1575. fi
  1576. # $prefix stores the value of the --prefix command line option, or
  1577. # NONE if the option wasn't set. In the case that it wasn't set, make
  1578. # it be the default, so that we can use it to expand directories now.
  1579. if test "x$prefix" = "xNONE"; then
  1580. prefix=$ac_default_prefix
  1581. fi
  1582. # and similarly for $exec_prefix
  1583. if test "x$exec_prefix" = "xNONE"; then
  1584. exec_prefix=$prefix
  1585. fi
  1586. if test "x$BUILDDIR" = "x"; then
  1587. BUILDDIR=`pwd`
  1588. fi
  1589. AC_SUBST(BUILDDIR)
  1590. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1591. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1592. if test "x$CONFDIR" = "x"; then
  1593. CONFDIR=`eval echo $sysconfdir/tor`
  1594. fi
  1595. AC_SUBST(CONFDIR)
  1596. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1597. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1598. BINDIR=`eval echo $bindir`
  1599. AC_SUBST(BINDIR)
  1600. LOCALSTATEDIR=`eval echo $localstatedir`
  1601. AC_SUBST(LOCALSTATEDIR)
  1602. if test "$bwin32" = "true"; then
  1603. # Test if the linker supports the --nxcompat and --dynamicbase options
  1604. # for Windows
  1605. save_LDFLAGS="$LDFLAGS"
  1606. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1607. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1608. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1609. [AC_MSG_RESULT([yes])]
  1610. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1611. [AC_MSG_RESULT([no])]
  1612. )
  1613. LDFLAGS="$save_LDFLAGS"
  1614. fi
  1615. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1616. # than autoconf's macros like.
  1617. if test "$GCC" = "yes"; then
  1618. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1619. # accident waiting to happen.
  1620. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1621. else
  1622. # Override optimization level for non-gcc compilers
  1623. CFLAGS="$CFLAGS -O"
  1624. enable_gcc_warnings=no
  1625. enable_gcc_warnings_advisory=no
  1626. fi
  1627. # Warnings implies advisory-warnings and -Werror.
  1628. if test "$enable_gcc_warnings" = "yes"; then
  1629. enable_gcc_warnings_advisory=yes
  1630. enable_fatal_warnings=yes
  1631. fi
  1632. # OS X Lion started deprecating the system openssl. Let's just disable
  1633. # all deprecation warnings on OS X. Also, to potentially make the binary
  1634. # a little smaller, let's enable dead_strip.
  1635. case "$host_os" in
  1636. darwin*)
  1637. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1638. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1639. esac
  1640. # Add some more warnings which we use in development but not in the
  1641. # released versions. (Some relevant gcc versions can't handle these.)
  1642. #
  1643. # Note that we have to do this near the end of the autoconf process, or
  1644. # else we may run into problems when these warnings hit on the testing C
  1645. # programs that autoconf wants to build.
  1646. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1647. case "$host" in
  1648. *-*-openbsd* | *-*-bitrig*)
  1649. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1650. # That's fine, except that the headers don't pass -Wredundant-decls.
  1651. # Therefore, let's disable -Wsystem-headers when we're building
  1652. # with maximal warnings on OpenBSD.
  1653. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1654. esac
  1655. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1656. # have it work better.
  1657. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1658. # This warning was added in gcc 4.3, but it appears to generate
  1659. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1660. #CFLAGS="$CFLAGS -Wlogical-op"
  1661. m4_foreach_w([warning_flag], [
  1662. -Waddress
  1663. -Waddress-of-array-temporary
  1664. -Waddress-of-temporary
  1665. -Wambiguous-macro
  1666. -Wanonymous-pack-parens
  1667. -Warc
  1668. -Warc-abi
  1669. -Warc-bridge-casts-disallowed-in-nonarc
  1670. -Warc-maybe-repeated-use-of-weak
  1671. -Warc-performSelector-leaks
  1672. -Warc-repeated-use-of-weak
  1673. -Warray-bounds
  1674. -Warray-bounds-pointer-arithmetic
  1675. -Wasm
  1676. -Wasm-operand-widths
  1677. -Watomic-properties
  1678. -Watomic-property-with-user-defined-accessor
  1679. -Wauto-import
  1680. -Wauto-storage-class
  1681. -Wauto-var-id
  1682. -Wavailability
  1683. -Wbackslash-newline-escape
  1684. -Wbad-array-new-length
  1685. -Wbind-to-temporary-copy
  1686. -Wbitfield-constant-conversion
  1687. -Wbool-conversion
  1688. -Wbool-conversions
  1689. -Wbuiltin-requires-header
  1690. -Wchar-align
  1691. -Wcompare-distinct-pointer-types
  1692. -Wcomplex-component-init
  1693. -Wconditional-type-mismatch
  1694. -Wconfig-macros
  1695. -Wconstant-conversion
  1696. -Wconstant-logical-operand
  1697. -Wconstexpr-not-const
  1698. -Wcustom-atomic-properties
  1699. -Wdangling-field
  1700. -Wdangling-initializer-list
  1701. -Wdate-time
  1702. -Wdelegating-ctor-cycles
  1703. -Wdeprecated-implementations
  1704. -Wdeprecated-register
  1705. -Wdirect-ivar-access
  1706. -Wdiscard-qual
  1707. -Wdistributed-object-modifiers
  1708. -Wdivision-by-zero
  1709. -Wdollar-in-identifier-extension
  1710. -Wdouble-promotion
  1711. -Wduplicate-decl-specifier
  1712. -Wduplicate-enum
  1713. -Wduplicate-method-arg
  1714. -Wduplicate-method-match
  1715. -Wduplicated-cond
  1716. -Wdynamic-class-memaccess
  1717. -Wembedded-directive
  1718. -Wempty-translation-unit
  1719. -Wenum-conversion
  1720. -Wexit-time-destructors
  1721. -Wexplicit-ownership-type
  1722. -Wextern-initializer
  1723. -Wextra
  1724. -Wextra-semi
  1725. -Wextra-tokens
  1726. -Wflexible-array-extensions
  1727. -Wfloat-conversion
  1728. -Wformat-non-iso
  1729. -Wfour-char-constants
  1730. -Wgcc-compat
  1731. -Wglobal-constructors
  1732. -Wgnu-array-member-paren-init
  1733. -Wgnu-designator
  1734. -Wgnu-static-float-init
  1735. -Wheader-guard
  1736. -Wheader-hygiene
  1737. -Widiomatic-parentheses
  1738. -Wignored-attributes
  1739. -Wimplicit-atomic-properties
  1740. -Wimplicit-conversion-floating-point-to-bool
  1741. -Wimplicit-exception-spec-mismatch
  1742. -Wimplicit-fallthrough
  1743. -Wimplicit-fallthrough-per-function
  1744. -Wimplicit-retain-self
  1745. -Wimport-preprocessor-directive-pedantic
  1746. -Wincompatible-library-redeclaration
  1747. -Wincompatible-pointer-types-discards-qualifiers
  1748. -Wincomplete-implementation
  1749. -Wincomplete-module
  1750. -Wincomplete-umbrella
  1751. -Winit-self
  1752. -Wint-conversions
  1753. -Wint-to-void-pointer-cast
  1754. -Winteger-overflow
  1755. -Winvalid-constexpr
  1756. -Winvalid-iboutlet
  1757. -Winvalid-noreturn
  1758. -Winvalid-pp-token
  1759. -Winvalid-source-encoding
  1760. -Winvalid-token-paste
  1761. -Wknr-promoted-parameter
  1762. -Wlarge-by-value-copy
  1763. -Wliteral-conversion
  1764. -Wliteral-range
  1765. -Wlocal-type-template-args
  1766. -Wlogical-op
  1767. -Wloop-analysis
  1768. -Wmain-return-type
  1769. -Wmalformed-warning-check
  1770. -Wmethod-signatures
  1771. -Wmicrosoft
  1772. -Wmicrosoft-exists
  1773. -Wmismatched-parameter-types
  1774. -Wmismatched-return-types
  1775. -Wmissing-field-initializers
  1776. -Wmissing-format-attribute
  1777. -Wmissing-noreturn
  1778. -Wmissing-selector-name
  1779. -Wmissing-sysroot
  1780. -Wmissing-variable-declarations
  1781. -Wmodule-conflict
  1782. -Wnested-anon-types
  1783. -Wnewline-eof
  1784. -Wnon-literal-null-conversion
  1785. -Wnon-pod-varargs
  1786. -Wnonportable-cfstrings
  1787. -Wnormalized=nfkc
  1788. -Wnull-arithmetic
  1789. -Wnull-character
  1790. -Wnull-conversion
  1791. -Wnull-dereference
  1792. -Wout-of-line-declaration
  1793. -Wover-aligned
  1794. -Woverlength-strings
  1795. -Woverride-init
  1796. -Woverriding-method-mismatch
  1797. -Wpointer-type-mismatch
  1798. -Wpredefined-identifier-outside-function
  1799. -Wprotocol-property-synthesis-ambiguity
  1800. -Wreadonly-iboutlet-property
  1801. -Wreadonly-setter-attrs
  1802. -Wreceiver-expr
  1803. -Wreceiver-forward-class
  1804. -Wreceiver-is-weak
  1805. -Wreinterpret-base-class
  1806. -Wrequires-super-attribute
  1807. -Wreserved-user-defined-literal
  1808. -Wreturn-stack-address
  1809. -Wsection
  1810. -Wselector-type-mismatch
  1811. -Wsentinel
  1812. -Wserialized-diagnostics
  1813. -Wshadow
  1814. -Wshift-count-negative
  1815. -Wshift-count-overflow
  1816. -Wshift-negative-value
  1817. -Wshift-overflow=2
  1818. -Wshift-sign-overflow
  1819. -Wshorten-64-to-32
  1820. -Wsizeof-array-argument
  1821. -Wsource-uses-openmp
  1822. -Wstatic-float-init
  1823. -Wstatic-in-inline
  1824. -Wstatic-local-in-inline
  1825. -Wstrict-overflow=1
  1826. -Wstring-compare
  1827. -Wstring-conversion
  1828. -Wstrlcpy-strlcat-size
  1829. -Wstrncat-size
  1830. -Wsuggest-attribute=format
  1831. -Wsuggest-attribute=noreturn
  1832. -Wsuper-class-method-mismatch
  1833. -Wswitch-bool
  1834. -Wsync-nand
  1835. -Wtautological-constant-out-of-range-compare
  1836. -Wtentative-definition-incomplete-type
  1837. -Wtrampolines
  1838. -Wtype-safety
  1839. -Wtypedef-redefinition
  1840. -Wtypename-missing
  1841. -Wundefined-inline
  1842. -Wundefined-internal
  1843. -Wundefined-reinterpret-cast
  1844. -Wunicode
  1845. -Wunicode-whitespace
  1846. -Wunknown-warning-option
  1847. -Wunnamed-type-template-args
  1848. -Wunneeded-member-function
  1849. -Wunsequenced
  1850. -Wunsupported-visibility
  1851. -Wunused-but-set-parameter
  1852. -Wunused-but-set-variable
  1853. -Wunused-command-line-argument
  1854. -Wunused-const-variable=2
  1855. -Wunused-exception-parameter
  1856. -Wunused-local-typedefs
  1857. -Wunused-member-function
  1858. -Wunused-sanitize-argument
  1859. -Wunused-volatile-lvalue
  1860. -Wuser-defined-literals
  1861. -Wvariadic-macros
  1862. -Wvector-conversion
  1863. -Wvector-conversions
  1864. -Wvexing-parse
  1865. -Wvisibility
  1866. -Wvla-extension
  1867. -Wzero-length-array
  1868. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1869. dnl We should re-enable this in some later version. Clang doesn't
  1870. dnl mind, but it causes trouble with GCC.
  1871. dnl -Wstrict-overflow=2
  1872. dnl These seem to require annotations that we don't currently use,
  1873. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1874. dnl -Wthread-safety
  1875. dnl -Wthread-safety-analysis
  1876. dnl -Wthread-safety-attributes
  1877. dnl -Wthread-safety-beta
  1878. dnl -Wthread-safety-precise
  1879. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1880. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1881. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1882. CFLAGS="$CFLAGS -Wwrite-strings"
  1883. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1884. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1885. CFLAGS="$CFLAGS -Wunused-parameter "
  1886. # These interfere with building main() { return 0; }, which autoconf
  1887. # likes to use as its default program.
  1888. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1889. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1890. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1891. fi
  1892. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1893. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1894. fi
  1895. if test "x$enable_fatal_warnings" = "xyes"; then
  1896. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1897. # default autoconf programs are full of errors.
  1898. CFLAGS="$CFLAGS -Werror"
  1899. fi
  1900. fi
  1901. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1902. case "$host_os" in
  1903. darwin*)
  1904. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1905. esac
  1906. fi
  1907. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1908. AC_CONFIG_FILES([
  1909. Doxyfile
  1910. Makefile
  1911. contrib/dist/suse/tor.sh
  1912. contrib/operator-tools/tor.logrotate
  1913. contrib/dist/tor.sh
  1914. contrib/dist/torctl
  1915. contrib/dist/tor.service
  1916. src/config/torrc.sample
  1917. src/config/torrc.minimal
  1918. src/rust/.cargo/config
  1919. scripts/maint/checkOptionDocs.pl
  1920. scripts/maint/updateVersions.pl
  1921. ])
  1922. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1923. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1924. for file in $regular_mans ; do
  1925. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1926. echo "==================================";
  1927. echo;
  1928. echo "Building Tor has failed since manpages cannot be built.";
  1929. echo;
  1930. echo "You need asciidoc installed to be able to build the manpages.";
  1931. echo "To build without manpages, use the --disable-asciidoc argument";
  1932. echo "when calling configure.";
  1933. echo;
  1934. echo "==================================";
  1935. exit 1;
  1936. fi
  1937. done
  1938. fi
  1939. if test "$fragile_hardening" = "yes"; then
  1940. AC_MSG_WARN([
  1941. ============
  1942. Warning! Building Tor with --enable-fragile-hardening (also known as
  1943. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  1944. other kinds of attacks easier. A Tor instance build with this option will be
  1945. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  1946. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  1947. denial of service attacks. For more information, see
  1948. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  1949. ============
  1950. ])
  1951. fi
  1952. AC_OUTPUT