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