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