configure.ac 62 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) 2007-2015, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_PREREQ([2.63])
  6. AC_INIT([tor],[0.3.1.0-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_USE_SYSTEM_EXTENSIONS
  16. AC_CANONICAL_HOST
  17. PKG_PROG_PKG_CONFIG
  18. if test -f "/etc/redhat-release"; then
  19. if test -f "/usr/kerberos/include"; then
  20. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  21. fi
  22. fi
  23. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  24. # the += operator on it in src/or/Makefile.am
  25. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  28. AC_ARG_ENABLE(static-openssl,
  29. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  30. AC_ARG_ENABLE(static-libevent,
  31. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  32. AC_ARG_ENABLE(static-zlib,
  33. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  34. AC_ARG_ENABLE(static-tor,
  35. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  36. AC_ARG_ENABLE(unittests,
  37. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  38. AC_ARG_ENABLE(coverage,
  39. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  40. AC_ARG_ENABLE(asserts-in-tests,
  41. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  42. AC_ARG_ENABLE(system-torrc,
  43. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  44. AC_ARG_ENABLE(libfuzzer,
  45. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  46. AC_ARG_ENABLE(oss-fuzz,
  47. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  48. AC_ARG_ENABLE(memory-sentinels,
  49. AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
  50. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  51. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  52. fi
  53. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  54. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  55. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  56. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  57. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  58. if test "$enable_static_tor" = "yes"; then
  59. enable_static_libevent="yes";
  60. enable_static_openssl="yes";
  61. enable_static_zlib="yes";
  62. CFLAGS="$CFLAGS -static"
  63. fi
  64. if test "$enable_system_torrc" = "no"; then
  65. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  66. [Defined if we're not going to look for a torrc in SYSCONF])
  67. fi
  68. if test "$enable_memory_sentinels" = "no"; then
  69. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  70. [Defined if we're turning off memory safety code to look for bugs])
  71. fi
  72. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  73. AC_ARG_ENABLE(asciidoc,
  74. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  75. [case "${enableval}" in
  76. "yes") asciidoc=true ;;
  77. "no") asciidoc=false ;;
  78. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  79. esac], [asciidoc=true])
  80. # systemd notify support
  81. AC_ARG_ENABLE(systemd,
  82. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  83. [case "${enableval}" in
  84. "yes") systemd=true ;;
  85. "no") systemd=false ;;
  86. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  87. esac], [systemd=auto])
  88. # systemd support
  89. if test "x$enable_systemd" = "xno"; then
  90. have_systemd=no;
  91. else
  92. PKG_CHECK_MODULES(SYSTEMD,
  93. [libsystemd-daemon],
  94. have_systemd=yes,
  95. have_systemd=no)
  96. if test "x$have_systemd" = "xno"; then
  97. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  98. PKG_CHECK_MODULES(SYSTEMD,
  99. [libsystemd],
  100. have_systemd=yes,
  101. have_systemd=no)
  102. fi
  103. fi
  104. if test "x$have_systemd" = "xyes"; then
  105. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  106. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  107. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  108. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  109. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  110. fi
  111. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  112. AC_SUBST(TOR_SYSTEMD_LIBS)
  113. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  114. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  115. fi
  116. case "$host" in
  117. *-*-solaris* )
  118. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  119. ;;
  120. esac
  121. AC_ARG_ENABLE(gcc-warnings,
  122. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  123. AC_ARG_ENABLE(fatal-warnings,
  124. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  125. AC_ARG_ENABLE(gcc-warnings-advisory,
  126. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  127. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  128. AC_ARG_ENABLE(gcc-hardening,
  129. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  130. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  131. AC_ARG_ENABLE(expensive-hardening,
  132. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  133. AC_ARG_ENABLE(fragile-hardening,
  134. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  135. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  136. fragile_hardening="yes"
  137. fi
  138. dnl Linker hardening options
  139. dnl Currently these options are ELF specific - you can't use this with MacOSX
  140. AC_ARG_ENABLE(linker-hardening,
  141. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  142. AC_ARG_ENABLE(local-appdata,
  143. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  144. if test "$enable_local_appdata" = "yes"; then
  145. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  146. [Defined if we default to host local appdata paths on Windows])
  147. fi
  148. # Tor2web mode flag
  149. AC_ARG_ENABLE(tor2web-mode,
  150. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  151. [if test "x$enableval" = "xyes"; then
  152. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  153. fi])
  154. AC_ARG_ENABLE(tool-name-check,
  155. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  156. AC_ARG_ENABLE(seccomp,
  157. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  158. AC_ARG_ENABLE(libscrypt,
  159. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  160. dnl check for the correct "ar" when cross-compiling.
  161. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  162. dnl so kludge up a replacement for the case where it isn't there yet.)
  163. m4_ifdef([AM_PROG_AR],
  164. [AM_PROG_AR],
  165. [AN_MAKEVAR([AR], [AC_PROG_AR])
  166. AN_PROGRAM([ar], [AC_PROG_AR])
  167. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  168. AC_PROG_AR])
  169. dnl Check whether the above macro has settled for a simply named tool even
  170. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  171. dnl because that will find any cc on the system, not only the cross-compiler,
  172. dnl and then verify that a binary built with this compiler runs on the
  173. dnl build system. It will then come to the false conclusion that we're not
  174. dnl cross-compiling.
  175. if test "x$enable_tool_name_check" != "xno"; then
  176. if test "x$ac_tool_warned" = "xyes"; then
  177. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  178. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  179. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  180. fi
  181. fi
  182. AC_PROG_CC
  183. AC_PROG_CPP
  184. AC_PROG_MAKE_SET
  185. AC_PROG_RANLIB
  186. AC_PROG_SED
  187. AC_ARG_VAR([PERL], [path to Perl binary])
  188. AC_CHECK_PROGS([PERL], [perl])
  189. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  190. dnl check for asciidoc and a2x
  191. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  192. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  193. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  194. AM_PROG_CC_C_O
  195. AC_PROG_CC_C99
  196. AC_ARG_VAR([PYTHON], [path to Python binary])
  197. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  198. if test "x$PYTHON" = "x"; then
  199. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  200. fi
  201. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  202. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  203. AC_C_FLEXIBLE_ARRAY_MEMBER
  204. ], [
  205. dnl Maybe we've got an old autoconf...
  206. AC_CACHE_CHECK([for flexible array members],
  207. tor_cv_c_flexarray,
  208. [AC_COMPILE_IFELSE(
  209. AC_LANG_PROGRAM([
  210. struct abc { int a; char b[]; };
  211. ], [
  212. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  213. def->b[0] = 33;
  214. ]),
  215. [tor_cv_c_flexarray=yes],
  216. [tor_cv_c_flexarray=no])])
  217. if test "$tor_cv_flexarray" = "yes"; then
  218. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  219. else
  220. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  221. fi
  222. ])
  223. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  224. tor_cv_c_c99_decl,
  225. [AC_COMPILE_IFELSE(
  226. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  227. [tor_cv_c_c99_decl=yes],
  228. [tor_cv_c_c99_decl=no] )])
  229. if test "$tor_cv_c_c99_decl" != "yes"; then
  230. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  231. fi
  232. AC_CACHE_CHECK([for working C99 designated initializers],
  233. tor_cv_c_c99_designated_init,
  234. [AC_COMPILE_IFELSE(
  235. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  236. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  237. [tor_cv_c_c99_designated_init=yes],
  238. [tor_cv_c_c99_designated_init=no] )])
  239. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  240. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  241. fi
  242. TORUSER=_tor
  243. AC_ARG_WITH(tor-user,
  244. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  245. [
  246. TORUSER=$withval
  247. ]
  248. )
  249. AC_SUBST(TORUSER)
  250. TORGROUP=_tor
  251. AC_ARG_WITH(tor-group,
  252. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  253. [
  254. TORGROUP=$withval
  255. ]
  256. )
  257. AC_SUBST(TORGROUP)
  258. dnl If _WIN32 is defined and non-zero, we are building for win32
  259. AC_MSG_CHECKING([for win32])
  260. AC_RUN_IFELSE([AC_LANG_SOURCE([
  261. int main(int c, char **v) {
  262. #ifdef _WIN32
  263. #if _WIN32
  264. return 0;
  265. #else
  266. return 1;
  267. #endif
  268. #else
  269. return 2;
  270. #endif
  271. }])],
  272. bwin32=true; AC_MSG_RESULT([yes]),
  273. bwin32=false; AC_MSG_RESULT([no]),
  274. bwin32=cross; AC_MSG_RESULT([cross])
  275. )
  276. if test "$bwin32" = "cross"; then
  277. AC_MSG_CHECKING([for win32 (cross)])
  278. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  279. #ifdef _WIN32
  280. int main(int c, char **v) {return 0;}
  281. #else
  282. #error
  283. int main(int c, char **v) {return x(y);}
  284. #endif
  285. ])],
  286. bwin32=true; AC_MSG_RESULT([yes]),
  287. bwin32=false; AC_MSG_RESULT([no]))
  288. fi
  289. AH_BOTTOM([
  290. #ifdef _WIN32
  291. /* Defined to access windows functions and definitions for >=WinXP */
  292. # ifndef WINVER
  293. # define WINVER 0x0501
  294. # endif
  295. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  296. # ifndef _WIN32_WINNT
  297. # define _WIN32_WINNT 0x0501
  298. # endif
  299. /* Defined to avoid including some windows headers as part of Windows.h */
  300. # ifndef WIN32_LEAN_AND_MEAN
  301. # define WIN32_LEAN_AND_MEAN 1
  302. # endif
  303. #endif
  304. ])
  305. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  306. dnl Enable C99 when compiling with MIPSpro
  307. AC_MSG_CHECKING([for MIPSpro compiler])
  308. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  309. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  310. #error
  311. return x(y);
  312. #endif
  313. ])],
  314. bmipspro=false; AC_MSG_RESULT(no),
  315. bmipspro=true; AC_MSG_RESULT(yes))
  316. if test "$bmipspro" = "true"; then
  317. CFLAGS="$CFLAGS -c99"
  318. fi
  319. AC_C_BIGENDIAN
  320. AC_SEARCH_LIBS(socket, [socket network])
  321. AC_SEARCH_LIBS(gethostbyname, [nsl])
  322. AC_SEARCH_LIBS(dlopen, [dl])
  323. AC_SEARCH_LIBS(inet_aton, [resolv])
  324. AC_SEARCH_LIBS(backtrace, [execinfo])
  325. saved_LIBS="$LIBS"
  326. AC_SEARCH_LIBS([clock_gettime], [rt])
  327. if test "$LIBS" != "$saved_LIBS"; then
  328. # Looks like we need -lrt for clock_gettime().
  329. have_rt=yes
  330. fi
  331. AC_SEARCH_LIBS(pthread_create, [pthread])
  332. AC_SEARCH_LIBS(pthread_detach, [pthread])
  333. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  334. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  335. AC_CHECK_FUNCS(
  336. _NSGetEnviron \
  337. RtlSecureZeroMemory \
  338. SecureZeroMemory \
  339. accept4 \
  340. backtrace \
  341. backtrace_symbols_fd \
  342. eventfd \
  343. explicit_bzero \
  344. timingsafe_memcmp \
  345. flock \
  346. ftime \
  347. getaddrinfo \
  348. getifaddrs \
  349. getpass \
  350. getrlimit \
  351. gettimeofday \
  352. gmtime_r \
  353. htonll \
  354. inet_aton \
  355. ioctl \
  356. issetugid \
  357. llround \
  358. localtime_r \
  359. lround \
  360. memmem \
  361. memset_s \
  362. pipe \
  363. pipe2 \
  364. prctl \
  365. readpassphrase \
  366. rint \
  367. sigaction \
  368. socketpair \
  369. statvfs \
  370. strlcat \
  371. strlcpy \
  372. strnlen \
  373. strptime \
  374. strtok_r \
  375. strtoull \
  376. sysconf \
  377. sysctl \
  378. truncate \
  379. uname \
  380. usleep \
  381. vasprintf \
  382. _vscprintf
  383. )
  384. # Apple messed up when they added two functions functions in Sierra: they
  385. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  386. # checks. So we should only probe for those functions if we are sure that we
  387. # are not targetting OSX 10.11 or earlier.
  388. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  389. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  390. #ifdef __APPLE__
  391. # include <AvailabilityMacros.h>
  392. # ifndef MAC_OS_X_VERSION_10_12
  393. # define MAC_OS_X_VERSION_10_12 101200
  394. # endif
  395. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  396. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  397. # error "Running on Mac OSX 10.11 or earlier"
  398. # endif
  399. # endif
  400. #endif
  401. ]], [[]])],
  402. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  403. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  404. if test "$on_macos_pre_10_12" = "no"; then
  405. AC_CHECK_FUNCS(
  406. clock_gettime \
  407. getentropy \
  408. )
  409. fi
  410. if test "$bwin32" != "true"; then
  411. AC_CHECK_HEADERS(pthread.h)
  412. AC_CHECK_FUNCS(pthread_create)
  413. AC_CHECK_FUNCS(pthread_condattr_setclock)
  414. fi
  415. if test "$bwin32" = "true"; then
  416. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  417. #include <windows.h>
  418. #include <conio.h>
  419. #include <wchar.h>
  420. ])
  421. fi
  422. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  423. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  424. dnl ------------------------------------------------------
  425. dnl Where do you live, libevent? And how do we call you?
  426. if test "$bwin32" = "true"; then
  427. TOR_LIB_WS32=-lws2_32
  428. TOR_LIB_IPHLPAPI=-liphlpapi
  429. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  430. # think it's actually necessary.
  431. TOR_LIB_GDI=-lgdi32
  432. else
  433. TOR_LIB_WS32=
  434. TOR_LIB_GDI=
  435. fi
  436. AC_SUBST(TOR_LIB_WS32)
  437. AC_SUBST(TOR_LIB_GDI)
  438. AC_SUBST(TOR_LIB_IPHLPAPI)
  439. tor_libevent_pkg_redhat="libevent"
  440. tor_libevent_pkg_debian="libevent-dev"
  441. tor_libevent_devpkg_redhat="libevent-devel"
  442. tor_libevent_devpkg_debian="libevent-dev"
  443. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  444. dnl linking for static builds.
  445. STATIC_LIBEVENT_FLAGS=""
  446. if test "$enable_static_libevent" = "yes"; then
  447. if test "$have_rt" = "yes"; then
  448. STATIC_LIBEVENT_FLAGS=" -lrt "
  449. fi
  450. fi
  451. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  452. #ifdef _WIN32
  453. #include <winsock2.h>
  454. #endif
  455. #include <sys/time.h>
  456. #include <sys/types.h>
  457. #include <event2/event.h>], [
  458. #ifdef _WIN32
  459. #include <winsock2.h>
  460. #endif
  461. struct event_base;
  462. struct event_base *event_base_new(void);],
  463. [
  464. #ifdef _WIN32
  465. {WSADATA d; WSAStartup(0x101,&d); }
  466. #endif
  467. event_base_new();
  468. ], [--with-libevent-dir], [/opt/libevent])
  469. dnl Determine the incantation needed to link libevent.
  470. save_LIBS="$LIBS"
  471. save_LDFLAGS="$LDFLAGS"
  472. save_CPPFLAGS="$CPPFLAGS"
  473. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  474. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  475. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  476. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  477. if test "$enable_static_libevent" = "yes"; then
  478. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  479. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  480. else
  481. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  482. fi
  483. else
  484. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  485. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  486. 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"))
  487. if test "$ac_cv_search_event_new" != "none required"; then
  488. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  489. fi
  490. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  491. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  492. fi
  493. else
  494. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  495. fi
  496. fi
  497. dnl Now check for particular libevent functions.
  498. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  499. evutil_secure_rng_add_bytes \
  500. ])
  501. LIBS="$save_LIBS"
  502. LDFLAGS="$save_LDFLAGS"
  503. CPPFLAGS="$save_CPPFLAGS"
  504. dnl Check that libevent is at least at version 2.0.10, the first stable
  505. dnl release of its series
  506. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  507. AC_MSG_CHECKING([whether Libevent is new enough])
  508. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  509. #include <event2/event.h>
  510. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  511. #error
  512. int x = y(zz);
  513. #else
  514. int x = 1;
  515. #endif
  516. ])], [ AC_MSG_RESULT([yes]) ],
  517. [ AC_MSG_RESULT([no])
  518. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  519. LIBS="$save_LIBS"
  520. LDFLAGS="$save_LDFLAGS"
  521. CPPFLAGS="$save_CPPFLAGS"
  522. AC_SUBST(TOR_LIBEVENT_LIBS)
  523. dnl ------------------------------------------------------
  524. dnl Where do you live, libm?
  525. dnl On some platforms (Haiku/BeOS) the math library is
  526. dnl part of libroot. In which case don't link against lm
  527. TOR_LIB_MATH=""
  528. save_LIBS="$LIBS"
  529. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  530. if test "$ac_cv_search_pow" != "none required"; then
  531. TOR_LIB_MATH="$ac_cv_search_pow"
  532. fi
  533. LIBS="$save_LIBS"
  534. AC_SUBST(TOR_LIB_MATH)
  535. dnl ------------------------------------------------------
  536. dnl Where do you live, openssl? And how do we call you?
  537. tor_openssl_pkg_redhat="openssl"
  538. tor_openssl_pkg_debian="libssl-dev"
  539. tor_openssl_devpkg_redhat="openssl-devel"
  540. tor_openssl_devpkg_debian="libssl-dev"
  541. ALT_openssl_WITHVAL=""
  542. AC_ARG_WITH(ssl-dir,
  543. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  544. [
  545. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  546. ALT_openssl_WITHVAL="$withval"
  547. fi
  548. ])
  549. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  550. [#include <openssl/rand.h>],
  551. [void RAND_add(const void *buf, int num, double entropy);],
  552. [RAND_add((void*)0,0,0);], [],
  553. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  554. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  555. if test "$enable_static_openssl" = "yes"; then
  556. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  557. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  558. else
  559. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  560. fi
  561. else
  562. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  563. fi
  564. AC_SUBST(TOR_OPENSSL_LIBS)
  565. dnl Now check for particular openssl functions.
  566. save_LIBS="$LIBS"
  567. save_LDFLAGS="$LDFLAGS"
  568. save_CPPFLAGS="$CPPFLAGS"
  569. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  570. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  571. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  572. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  573. #include <openssl/opensslv.h>
  574. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  575. #error "too old"
  576. #endif
  577. ]], [[]])],
  578. [ : ],
  579. [ AC_MSG_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  580. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  581. #include <openssl/opensslv.h>
  582. #include <openssl/evp.h>
  583. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  584. #error "no ECC"
  585. #endif
  586. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  587. #error "curves unavailable"
  588. #endif
  589. ]], [[]])],
  590. [ : ],
  591. [ AC_MSG_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  592. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  593. [#include <openssl/ssl.h>
  594. ])
  595. AC_CHECK_FUNCS([ \
  596. SSL_SESSION_get_master_key \
  597. SSL_get_server_random \
  598. SSL_get_client_ciphers \
  599. SSL_get_client_random \
  600. SSL_CIPHER_find \
  601. TLS_method
  602. ])
  603. dnl Check if OpenSSL has scrypt implementation.
  604. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  605. dnl Check if OpenSSL structures are opaque
  606. AC_CHECK_MEMBERS([SSL.state], , ,
  607. [#include <openssl/ssl.h>
  608. ])
  609. LIBS="$save_LIBS"
  610. LDFLAGS="$save_LDFLAGS"
  611. CPPFLAGS="$save_CPPFLAGS"
  612. dnl ------------------------------------------------------
  613. dnl Where do you live, zlib? And how do we call you?
  614. tor_zlib_pkg_redhat="zlib"
  615. tor_zlib_pkg_debian="zlib1g"
  616. tor_zlib_devpkg_redhat="zlib-devel"
  617. tor_zlib_devpkg_debian="zlib1g-dev"
  618. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  619. [#include <zlib.h>],
  620. [const char * zlibVersion(void);],
  621. [zlibVersion();], [--with-zlib-dir],
  622. [/opt/zlib])
  623. if test "$enable_static_zlib" = "yes"; then
  624. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  625. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  626. using --enable-static-zlib")
  627. else
  628. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  629. fi
  630. else
  631. TOR_ZLIB_LIBS="-lz"
  632. fi
  633. AC_SUBST(TOR_ZLIB_LIBS)
  634. dnl ----------------------------------------------------------------------
  635. dnl Check if libcap is available for capabilities.
  636. tor_cap_pkg_debian="libcap2"
  637. tor_cap_pkg_redhat="libcap"
  638. tor_cap_devpkg_debian="libcap-dev"
  639. tor_cap_devpkg_redhat="libcap-devel"
  640. AC_CHECK_LIB([cap], [cap_init], [],
  641. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  642. )
  643. AC_CHECK_FUNCS(cap_set_proc)
  644. dnl ---------------------------------------------------------------------
  645. dnl Now that we know about our major libraries, we can check for compiler
  646. dnl and linker hardening options. We need to do this with the libraries known,
  647. dnl since sometimes the linker will like an option but not be willing to
  648. dnl use it with a build of a library.
  649. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  650. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  651. CFLAGS_FTRAPV=
  652. CFLAGS_FWRAPV=
  653. CFLAGS_ASAN=
  654. CFLAGS_UBSAN=
  655. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  656. #if !defined(__clang__)
  657. #error
  658. #endif])], have_clang=yes, have_clang=no)
  659. if test "x$enable_gcc_hardening" != "xno"; then
  660. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  661. if test "x$have_clang" = "xyes"; then
  662. TOR_CHECK_CFLAGS(-Qunused-arguments)
  663. fi
  664. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  665. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  666. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  667. m4_ifdef([AS_VAR_IF],[
  668. AS_VAR_IF(can_compile, [yes],
  669. AS_VAR_IF(can_link, [yes],
  670. [],
  671. 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.)]))
  672. )])
  673. AS_VAR_POPDEF([can_link])
  674. AS_VAR_POPDEF([can_compile])
  675. TOR_CHECK_CFLAGS(-Wstack-protector)
  676. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  677. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  678. TOR_CHECK_CFLAGS(-fPIE)
  679. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  680. fi
  681. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  682. fi
  683. if test "$fragile_hardening" = "yes"; then
  684. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  685. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  686. 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.])
  687. fi
  688. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  689. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  690. fi
  691. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  692. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  693. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  694. fi
  695. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  696. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  697. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  698. fi
  699. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  700. fi
  701. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  702. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  703. mulodi_fixes_ftrapv=no
  704. if test "$have_clang" = "yes"; then
  705. saved_CFLAGS="$CFLAGS"
  706. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  707. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  708. AC_LINK_IFELSE([
  709. AC_LANG_SOURCE([[
  710. #include <stdint.h>
  711. #include <stdlib.h>
  712. int main(int argc, char **argv)
  713. {
  714. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  715. * (int64_t)atoi(argv[3]);
  716. return x == 9;
  717. } ]])],
  718. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  719. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  720. if test "$ftrapv_can_link" = "no"; then
  721. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  722. AC_LINK_IFELSE([
  723. AC_LANG_SOURCE([[
  724. #include <stdint.h>
  725. #include <stdlib.h>
  726. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  727. *overflow=0;
  728. return a;
  729. }
  730. int main(int argc, char **argv)
  731. {
  732. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  733. * (int64_t)atoi(argv[3]);
  734. return x == 9;
  735. } ]])],
  736. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  737. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  738. fi
  739. CFLAGS="$saved_CFLAGS"
  740. fi
  741. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  742. dnl These cflags add bunches of branches, and we haven't been able to
  743. dnl persuade ourselves that they're suitable for code that needs to be
  744. dnl constant time.
  745. AC_SUBST(CFLAGS_BUGTRAP)
  746. dnl These cflags are variant ones sutable for code that needs to be
  747. dnl constant-time.
  748. AC_SUBST(CFLAGS_CONSTTIME)
  749. if test "x$enable_linker_hardening" != "xno"; then
  750. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  751. fi
  752. # For backtrace support
  753. TOR_CHECK_LDFLAGS(-rdynamic)
  754. dnl ------------------------------------------------------
  755. dnl Now see if we have a -fomit-frame-pointer compiler option.
  756. saved_CFLAGS="$CFLAGS"
  757. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  758. F_OMIT_FRAME_POINTER=''
  759. if test "$saved_CFLAGS" != "$CFLAGS"; then
  760. if test "$fragile_hardening" = "yes"; then
  761. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  762. fi
  763. fi
  764. CFLAGS="$saved_CFLAGS"
  765. AC_SUBST(F_OMIT_FRAME_POINTER)
  766. dnl ------------------------------------------------------
  767. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  768. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  769. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  770. dnl code will work.
  771. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  772. dnl ============================================================
  773. dnl Check for libseccomp
  774. if test "x$enable_seccomp" != "xno"; then
  775. AC_CHECK_HEADERS([seccomp.h])
  776. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  777. fi
  778. dnl ============================================================
  779. dnl Check for libscrypt
  780. if test "x$enable_libscrypt" != "xno"; then
  781. AC_CHECK_HEADERS([libscrypt.h])
  782. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  783. AC_CHECK_FUNCS([libscrypt_scrypt])
  784. fi
  785. dnl ============================================================
  786. dnl We need an implementation of curve25519.
  787. dnl set these defaults.
  788. build_curve25519_donna=no
  789. build_curve25519_donna_c64=no
  790. use_curve25519_donna=no
  791. use_curve25519_nacl=no
  792. CURVE25519_LIBS=
  793. dnl The best choice is using curve25519-donna-c64, but that requires
  794. dnl that we
  795. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  796. tor_cv_can_use_curve25519_donna_c64,
  797. [AC_RUN_IFELSE(
  798. [AC_LANG_PROGRAM([dnl
  799. #include <stdint.h>
  800. typedef unsigned uint128_t __attribute__((mode(TI)));
  801. int func(uint64_t a, uint64_t b) {
  802. uint128_t c = ((uint128_t)a) * b;
  803. int ok = ((uint64_t)(c>>96)) == 522859 &&
  804. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  805. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  806. (((uint64_t)(c))&0xffffffffL) == 0;
  807. return ok;
  808. }
  809. ], [dnl
  810. int ok = func( ((uint64_t)2000000000) * 1000000000,
  811. ((uint64_t)1234567890) << 24);
  812. return !ok;
  813. ])],
  814. [tor_cv_can_use_curve25519_donna_c64=yes],
  815. [tor_cv_can_use_curve25519_donna_c64=no],
  816. [AC_LINK_IFELSE(
  817. [AC_LANG_PROGRAM([dnl
  818. #include <stdint.h>
  819. typedef unsigned uint128_t __attribute__((mode(TI)));
  820. int func(uint64_t a, uint64_t b) {
  821. uint128_t c = ((uint128_t)a) * b;
  822. int ok = ((uint64_t)(c>>96)) == 522859 &&
  823. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  824. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  825. (((uint64_t)(c))&0xffffffffL) == 0;
  826. return ok;
  827. }
  828. ], [dnl
  829. int ok = func( ((uint64_t)2000000000) * 1000000000,
  830. ((uint64_t)1234567890) << 24);
  831. return !ok;
  832. ])],
  833. [tor_cv_can_use_curve25519_donna_c64=cross],
  834. [tor_cv_can_use_curve25519_donna_c64=no])])])
  835. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  836. nacl/crypto_scalarmult_curve25519.h])
  837. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  838. tor_cv_can_use_curve25519_nacl,
  839. [tor_saved_LIBS="$LIBS"
  840. LIBS="$LIBS -lnacl"
  841. AC_LINK_IFELSE(
  842. [AC_LANG_PROGRAM([dnl
  843. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  844. #include <crypto_scalarmult_curve25519.h>
  845. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  846. #include <nacl/crypto_scalarmult_curve25519.h>
  847. #endif
  848. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  849. #error Hey, this is the reference implementation! That's not fast.
  850. #endif
  851. ], [
  852. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  853. ])], [tor_cv_can_use_curve25519_nacl=yes],
  854. [tor_cv_can_use_curve25519_nacl=no])
  855. LIBS="$tor_saved_LIBS" ])
  856. dnl Okay, now we need to figure out which one to actually use. Fall back
  857. dnl to curve25519-donna.c
  858. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  859. build_curve25519_donna_c64=yes
  860. use_curve25519_donna=yes
  861. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  862. use_curve25519_nacl=yes
  863. CURVE25519_LIBS=-lnacl
  864. else
  865. build_curve25519_donna=yes
  866. use_curve25519_donna=yes
  867. fi
  868. if test "x$use_curve25519_donna" = "xyes"; then
  869. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  870. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  871. fi
  872. if test "x$use_curve25519_nacl" = "xyes"; then
  873. AC_DEFINE(USE_CURVE25519_NACL, 1,
  874. [Defined if we should use a curve25519 from nacl])
  875. fi
  876. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  877. test "x$build_curve25519_donna" = "xyes")
  878. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  879. test "x$build_curve25519_donna_c64" = "xyes")
  880. AC_SUBST(CURVE25519_LIBS)
  881. dnl Make sure to enable support for large off_t if available.
  882. AC_SYS_LARGEFILE
  883. AC_CHECK_HEADERS([assert.h \
  884. errno.h \
  885. fcntl.h \
  886. signal.h \
  887. string.h \
  888. sys/capability.h \
  889. sys/fcntl.h \
  890. sys/stat.h \
  891. sys/time.h \
  892. sys/types.h \
  893. time.h \
  894. unistd.h \
  895. arpa/inet.h \
  896. crt_externs.h \
  897. execinfo.h \
  898. grp.h \
  899. ifaddrs.h \
  900. inttypes.h \
  901. limits.h \
  902. linux/types.h \
  903. machine/limits.h \
  904. malloc.h \
  905. malloc/malloc.h \
  906. malloc_np.h \
  907. netdb.h \
  908. netinet/in.h \
  909. netinet/in6.h \
  910. pwd.h \
  911. readpassphrase.h \
  912. stdint.h \
  913. sys/eventfd.h \
  914. sys/file.h \
  915. sys/ioctl.h \
  916. sys/limits.h \
  917. sys/mman.h \
  918. sys/param.h \
  919. sys/prctl.h \
  920. sys/random.h \
  921. sys/resource.h \
  922. sys/select.h \
  923. sys/socket.h \
  924. sys/statvfs.h \
  925. sys/syscall.h \
  926. sys/sysctl.h \
  927. sys/syslimits.h \
  928. sys/time.h \
  929. sys/types.h \
  930. sys/un.h \
  931. sys/utime.h \
  932. sys/wait.h \
  933. syslog.h \
  934. utime.h])
  935. AC_CHECK_HEADERS(sys/param.h)
  936. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  937. [#ifdef HAVE_SYS_TYPES_H
  938. #include <sys/types.h>
  939. #endif
  940. #ifdef HAVE_SYS_SOCKET_H
  941. #include <sys/socket.h>
  942. #endif])
  943. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  944. [#ifdef HAVE_SYS_TYPES_H
  945. #include <sys/types.h>
  946. #endif
  947. #ifdef HAVE_SYS_SOCKET_H
  948. #include <sys/socket.h>
  949. #endif
  950. #ifdef HAVE_NET_IF_H
  951. #include <net/if.h>
  952. #endif
  953. #ifdef HAVE_NETINET_IN_H
  954. #include <netinet/in.h>
  955. #endif])
  956. AC_CHECK_HEADERS(linux/if.h,[],[],
  957. [
  958. #ifdef HAVE_SYS_SOCKET_H
  959. #include <sys/socket.h>
  960. #endif
  961. ])
  962. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  963. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  964. [#ifdef HAVE_SYS_TYPES_H
  965. #include <sys/types.h>
  966. #endif
  967. #ifdef HAVE_SYS_SOCKET_H
  968. #include <sys/socket.h>
  969. #endif
  970. #ifdef HAVE_LIMITS_H
  971. #include <limits.h>
  972. #endif
  973. #ifdef HAVE_LINUX_TYPES_H
  974. #include <linux/types.h>
  975. #endif
  976. #ifdef HAVE_NETINET_IN6_H
  977. #include <netinet/in6.h>
  978. #endif
  979. #ifdef HAVE_NETINET_IN_H
  980. #include <netinet/in.h>
  981. #endif])
  982. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  983. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  984. [#ifdef HAVE_SYS_TYPES_H
  985. #include <sys/types.h>
  986. #endif
  987. #ifdef HAVE_SYS_SOCKET_H
  988. #include <sys/socket.h>
  989. #endif
  990. #ifdef HAVE_LIMITS_H
  991. #include <limits.h>
  992. #endif
  993. #ifdef HAVE_LINUX_TYPES_H
  994. #include <linux/types.h>
  995. #endif
  996. #ifdef HAVE_NETINET_IN6_H
  997. #include <netinet/in6.h>
  998. #endif
  999. #ifdef HAVE_NETINET_IN_H
  1000. #include <netinet/in.h>
  1001. #endif
  1002. #ifdef HAVE_LINUX_IF_H
  1003. #include <linux/if.h>
  1004. #endif])
  1005. transparent_ok=0
  1006. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1007. transparent_ok=1
  1008. fi
  1009. if test "x$linux_netfilter_ipv4" = "x1"; then
  1010. transparent_ok=1
  1011. fi
  1012. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1013. transparent_ok=1
  1014. fi
  1015. if test "x$transparent_ok" = "x1"; then
  1016. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1017. else
  1018. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1019. fi
  1020. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1021. [#ifdef HAVE_SYS_TYPES_H
  1022. #include <sys/types.h>
  1023. #endif
  1024. #ifdef HAVE_SYS_TIME_H
  1025. #include <sys/time.h>
  1026. #endif])
  1027. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1028. dnl Watch out.
  1029. AC_CHECK_SIZEOF(int8_t)
  1030. AC_CHECK_SIZEOF(int16_t)
  1031. AC_CHECK_SIZEOF(int32_t)
  1032. AC_CHECK_SIZEOF(int64_t)
  1033. AC_CHECK_SIZEOF(uint8_t)
  1034. AC_CHECK_SIZEOF(uint16_t)
  1035. AC_CHECK_SIZEOF(uint32_t)
  1036. AC_CHECK_SIZEOF(uint64_t)
  1037. AC_CHECK_SIZEOF(intptr_t)
  1038. AC_CHECK_SIZEOF(uintptr_t)
  1039. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1040. AC_CHECK_SIZEOF(char)
  1041. AC_CHECK_SIZEOF(short)
  1042. AC_CHECK_SIZEOF(int)
  1043. AC_CHECK_SIZEOF(long)
  1044. AC_CHECK_SIZEOF(long long)
  1045. AC_CHECK_SIZEOF(__int64)
  1046. AC_CHECK_SIZEOF(void *)
  1047. AC_CHECK_SIZEOF(time_t)
  1048. AC_CHECK_SIZEOF(size_t)
  1049. AC_CHECK_SIZEOF(pid_t)
  1050. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1051. AC_PC_FROM_UCONTEXT([:])
  1052. dnl used to include sockaddr_storage, but everybody has that.
  1053. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1054. [#ifdef HAVE_SYS_TYPES_H
  1055. #include <sys/types.h>
  1056. #endif
  1057. #ifdef HAVE_NETINET_IN_H
  1058. #include <netinet/in.h>
  1059. #endif
  1060. #ifdef HAVE_NETINET_IN6_H
  1061. #include <netinet/in6.h>
  1062. #endif
  1063. #ifdef HAVE_SYS_SOCKET_H
  1064. #include <sys/socket.h>
  1065. #endif
  1066. #ifdef _WIN32
  1067. #define _WIN32_WINNT 0x0501
  1068. #define WIN32_LEAN_AND_MEAN
  1069. #include <winsock2.h>
  1070. #include <ws2tcpip.h>
  1071. #endif
  1072. ])
  1073. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1074. [#ifdef HAVE_SYS_TYPES_H
  1075. #include <sys/types.h>
  1076. #endif
  1077. #ifdef HAVE_NETINET_IN_H
  1078. #include <netinet/in.h>
  1079. #endif
  1080. #ifdef HAVE_NETINET_IN6_H
  1081. #include <netinet/in6.h>
  1082. #endif
  1083. #ifdef HAVE_SYS_SOCKET_H
  1084. #include <sys/socket.h>
  1085. #endif
  1086. #ifdef _WIN32
  1087. #define _WIN32_WINNT 0x0501
  1088. #define WIN32_LEAN_AND_MEAN
  1089. #include <winsock2.h>
  1090. #include <ws2tcpip.h>
  1091. #endif
  1092. ])
  1093. AC_CHECK_TYPES([rlim_t], , ,
  1094. [#ifdef HAVE_SYS_TYPES_H
  1095. #include <sys/types.h>
  1096. #endif
  1097. #ifdef HAVE_SYS_TIME_H
  1098. #include <sys/time.h>
  1099. #endif
  1100. #ifdef HAVE_SYS_RESOURCE_H
  1101. #include <sys/resource.h>
  1102. #endif
  1103. ])
  1104. AX_CHECK_SIGN([time_t],
  1105. [ : ],
  1106. [ : ], [
  1107. #ifdef HAVE_SYS_TYPES_H
  1108. #include <sys/types.h>
  1109. #endif
  1110. #ifdef HAVE_SYS_TIME_H
  1111. #include <sys/time.h>
  1112. #endif
  1113. #ifdef HAVE_TIME_H
  1114. #include <time.h>
  1115. #endif
  1116. ])
  1117. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1118. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1119. fi
  1120. AX_CHECK_SIGN([size_t],
  1121. [ tor_cv_size_t_signed=yes ],
  1122. [ tor_cv_size_t_signed=no ], [
  1123. #ifdef HAVE_SYS_TYPES_H
  1124. #include <sys/types.h>
  1125. #endif
  1126. ])
  1127. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1128. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1129. fi
  1130. AX_CHECK_SIGN([enum always],
  1131. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1132. [ : ], [
  1133. enum always { AAA, BBB, CCC };
  1134. ])
  1135. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1136. #ifdef HAVE_SYS_SOCKET_H
  1137. #include <sys/socket.h>
  1138. #endif
  1139. ])
  1140. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1141. AC_CHECK_SIZEOF(cell_t)
  1142. # Now make sure that NULL can be represented as zero bytes.
  1143. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1144. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1145. [[#include <stdlib.h>
  1146. #include <string.h>
  1147. #include <stdio.h>
  1148. #ifdef HAVE_STDDEF_H
  1149. #include <stddef.h>
  1150. #endif
  1151. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1152. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1153. [tor_cv_null_is_zero=yes],
  1154. [tor_cv_null_is_zero=no],
  1155. [tor_cv_null_is_zero=cross])])
  1156. if test "$tor_cv_null_is_zero" = "cross"; then
  1157. # Cross-compiling; let's hope that the target isn't raving mad.
  1158. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1159. fi
  1160. if test "$tor_cv_null_is_zero" != "no"; then
  1161. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1162. [Define to 1 iff memset(0) sets pointers to NULL])
  1163. fi
  1164. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1165. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1166. [[#include <stdlib.h>
  1167. #include <string.h>
  1168. #include <stdio.h>
  1169. #ifdef HAVE_STDDEF_H
  1170. #include <stddef.h>
  1171. #endif
  1172. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1173. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1174. [tor_cv_dbl0_is_zero=yes],
  1175. [tor_cv_dbl0_is_zero=no],
  1176. [tor_cv_dbl0_is_zero=cross])])
  1177. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1178. # Cross-compiling; let's hope that the target isn't raving mad.
  1179. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1180. fi
  1181. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1182. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1183. [Define to 1 iff memset(0) sets doubles to 0.0])
  1184. fi
  1185. # And what happens when we malloc zero?
  1186. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1187. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1188. [[#include <stdlib.h>
  1189. #include <string.h>
  1190. #include <stdio.h>
  1191. #ifdef HAVE_STDDEF_H
  1192. #include <stddef.h>
  1193. #endif
  1194. int main () { return malloc(0)?0:1; }]])],
  1195. [tor_cv_malloc_zero_works=yes],
  1196. [tor_cv_malloc_zero_works=no],
  1197. [tor_cv_malloc_zero_works=cross])])
  1198. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1199. # Cross-compiling; let's hope that the target isn't raving mad.
  1200. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1201. fi
  1202. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1203. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1204. [Define to 1 iff malloc(0) returns a pointer])
  1205. fi
  1206. # whether we seem to be in a 2s-complement world.
  1207. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1208. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1209. [[int main () { int problem = ((-99) != (~99)+1);
  1210. return problem ? 1 : 0; }]])],
  1211. [tor_cv_twos_complement=yes],
  1212. [tor_cv_twos_complement=no],
  1213. [tor_cv_twos_complement=cross])])
  1214. if test "$tor_cv_twos_complement" = "cross"; then
  1215. # Cross-compiling; let's hope that the target isn't raving mad.
  1216. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1217. fi
  1218. if test "$tor_cv_twos_complement" != "no"; then
  1219. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1220. [Define to 1 iff we represent negative integers with
  1221. two's complement])
  1222. fi
  1223. # What does shifting a negative value do?
  1224. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1225. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1226. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1227. [tor_cv_sign_extend=yes],
  1228. [tor_cv_sign_extend=no],
  1229. [tor_cv_sign_extend=cross])])
  1230. if test "$tor_cv_sign_extend" = "cross"; then
  1231. # Cross-compiling; let's hope that the target isn't raving mad.
  1232. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1233. fi
  1234. if test "$tor_cv_sign_extend" != "no"; then
  1235. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1236. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1237. fi
  1238. # Whether we should use the dmalloc memory allocation debugging library.
  1239. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1240. AC_ARG_WITH(dmalloc,
  1241. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1242. [if [[ "$withval" = "yes" ]]; then
  1243. dmalloc=1
  1244. AC_MSG_RESULT(yes)
  1245. else
  1246. dmalloc=1
  1247. AC_MSG_RESULT(no)
  1248. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1249. )
  1250. if [[ $dmalloc -eq 1 ]]; then
  1251. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1252. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1253. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1254. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1255. fi
  1256. AC_ARG_WITH(tcmalloc,
  1257. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1258. [ tcmalloc=yes ], [ tcmalloc=no ])
  1259. if test "x$tcmalloc" = "xyes"; then
  1260. LDFLAGS="-ltcmalloc $LDFLAGS"
  1261. fi
  1262. using_custom_malloc=no
  1263. if test "x$enable_openbsd_malloc" = "xyes"; then
  1264. using_custom_malloc=yes
  1265. fi
  1266. if test "x$tcmalloc" = "xyes"; then
  1267. using_custom_malloc=yes
  1268. fi
  1269. if test "$using_custom_malloc" = "no"; then
  1270. AC_CHECK_FUNCS(mallinfo)
  1271. fi
  1272. # By default, we're going to assume we don't have mlockall()
  1273. # bionic and other platforms have various broken mlockall subsystems.
  1274. # Some systems don't have a working mlockall, some aren't linkable,
  1275. # and some have it but don't declare it.
  1276. AC_CHECK_FUNCS(mlockall)
  1277. AC_CHECK_DECLS([mlockall], , , [
  1278. #ifdef HAVE_SYS_MMAN_H
  1279. #include <sys/mman.h>
  1280. #endif])
  1281. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1282. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1283. # using macros
  1284. AC_CHECK_DECLS([getpagesize], , , [
  1285. #ifdef HAVE_UNISTD_H
  1286. #include <unistd.h>
  1287. #endif])
  1288. # Allow user to specify an alternate syslog facility
  1289. AC_ARG_WITH(syslog-facility,
  1290. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1291. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1292. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1293. AC_SUBST(LOGFACILITY)
  1294. # Check if we have getresuid and getresgid
  1295. AC_CHECK_FUNCS(getresuid getresgid)
  1296. # Check for gethostbyname_r in all its glorious incompatible versions.
  1297. # (This logic is based on that in Python's configure.in)
  1298. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1299. [Define this if you have any gethostbyname_r()])
  1300. AC_CHECK_FUNC(gethostbyname_r, [
  1301. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1302. OLD_CFLAGS=$CFLAGS
  1303. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1304. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1305. #include <netdb.h>
  1306. ]], [[
  1307. char *cp1, *cp2;
  1308. struct hostent *h1, *h2;
  1309. int i1, i2;
  1310. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1311. ]])],[
  1312. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1313. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1314. [Define this if gethostbyname_r takes 6 arguments])
  1315. AC_MSG_RESULT(6)
  1316. ], [
  1317. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1318. #include <netdb.h>
  1319. ]], [[
  1320. char *cp1, *cp2;
  1321. struct hostent *h1;
  1322. int i1, i2;
  1323. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1324. ]])], [
  1325. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1326. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1327. [Define this if gethostbyname_r takes 5 arguments])
  1328. AC_MSG_RESULT(5)
  1329. ], [
  1330. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1331. #include <netdb.h>
  1332. ]], [[
  1333. char *cp1;
  1334. struct hostent *h1;
  1335. struct hostent_data hd;
  1336. (void) gethostbyname_r(cp1,h1,&hd);
  1337. ]])], [
  1338. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1339. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1340. [Define this if gethostbyname_r takes 3 arguments])
  1341. AC_MSG_RESULT(3)
  1342. ], [
  1343. AC_MSG_RESULT(0)
  1344. ])
  1345. ])
  1346. ])
  1347. CFLAGS=$OLD_CFLAGS
  1348. ])
  1349. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1350. tor_cv_have_func_macro,
  1351. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1352. #include <stdio.h>
  1353. int main(int c, char **v) { puts(__func__); }])],
  1354. tor_cv_have_func_macro=yes,
  1355. tor_cv_have_func_macro=no))
  1356. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1357. tor_cv_have_FUNC_macro,
  1358. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1359. #include <stdio.h>
  1360. int main(int c, char **v) { puts(__FUNC__); }])],
  1361. tor_cv_have_FUNC_macro=yes,
  1362. tor_cv_have_FUNC_macro=no))
  1363. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1364. tor_cv_have_FUNCTION_macro,
  1365. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1366. #include <stdio.h>
  1367. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1368. tor_cv_have_FUNCTION_macro=yes,
  1369. tor_cv_have_FUNCTION_macro=no))
  1370. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1371. tor_cv_have_environ_declared,
  1372. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1373. #ifdef HAVE_UNISTD_H
  1374. #include <unistd.h>
  1375. #endif
  1376. #include <stdlib.h>
  1377. int main(int c, char **v) { char **t = environ; }])],
  1378. tor_cv_have_environ_declared=yes,
  1379. tor_cv_have_environ_declared=no))
  1380. if test "$tor_cv_have_func_macro" = "yes"; then
  1381. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1382. fi
  1383. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1384. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1385. fi
  1386. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1387. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1388. [Defined if the compiler supports __FUNCTION__])
  1389. fi
  1390. if test "$tor_cv_have_environ_declared" = "yes"; then
  1391. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1392. [Defined if we have extern char **environ already declared])
  1393. fi
  1394. # $prefix stores the value of the --prefix command line option, or
  1395. # NONE if the option wasn't set. In the case that it wasn't set, make
  1396. # it be the default, so that we can use it to expand directories now.
  1397. if test "x$prefix" = "xNONE"; then
  1398. prefix=$ac_default_prefix
  1399. fi
  1400. # and similarly for $exec_prefix
  1401. if test "x$exec_prefix" = "xNONE"; then
  1402. exec_prefix=$prefix
  1403. fi
  1404. if test "x$BUILDDIR" = "x"; then
  1405. BUILDDIR=`pwd`
  1406. fi
  1407. AC_SUBST(BUILDDIR)
  1408. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1409. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1410. if test "x$CONFDIR" = "x"; then
  1411. CONFDIR=`eval echo $sysconfdir/tor`
  1412. fi
  1413. AC_SUBST(CONFDIR)
  1414. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1415. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1416. BINDIR=`eval echo $bindir`
  1417. AC_SUBST(BINDIR)
  1418. LOCALSTATEDIR=`eval echo $localstatedir`
  1419. AC_SUBST(LOCALSTATEDIR)
  1420. if test "$bwin32" = "true"; then
  1421. # Test if the linker supports the --nxcompat and --dynamicbase options
  1422. # for Windows
  1423. save_LDFLAGS="$LDFLAGS"
  1424. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1425. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1426. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1427. [AC_MSG_RESULT([yes])]
  1428. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1429. [AC_MSG_RESULT([no])]
  1430. )
  1431. LDFLAGS="$save_LDFLAGS"
  1432. fi
  1433. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1434. # than autoconf's macros like.
  1435. if test "$GCC" = "yes"; then
  1436. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1437. # accident waiting to happen.
  1438. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1439. else
  1440. # Override optimization level for non-gcc compilers
  1441. CFLAGS="$CFLAGS -O"
  1442. enable_gcc_warnings=no
  1443. enable_gcc_warnings_advisory=no
  1444. fi
  1445. # Warnings implies advisory-warnings and -Werror.
  1446. if test "$enable_gcc_warnings" = "yes"; then
  1447. enable_gcc_warnings_advisory=yes
  1448. enable_fatal_warnings=yes
  1449. fi
  1450. # OS X Lion started deprecating the system openssl. Let's just disable
  1451. # all deprecation warnings on OS X. Also, to potentially make the binary
  1452. # a little smaller, let's enable dead_strip.
  1453. case "$host_os" in
  1454. darwin*)
  1455. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1456. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1457. esac
  1458. # Add some more warnings which we use in development but not in the
  1459. # released versions. (Some relevant gcc versions can't handle these.)
  1460. #
  1461. # Note that we have to do this near the end of the autoconf process, or
  1462. # else we may run into problems when these warnings hit on the testing C
  1463. # programs that autoconf wants to build.
  1464. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1465. case "$host" in
  1466. *-*-openbsd* | *-*-bitrig*)
  1467. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1468. # That's fine, except that the headers don't pass -Wredundant-decls.
  1469. # Therefore, let's disable -Wsystem-headers when we're building
  1470. # with maximal warnings on OpenBSD.
  1471. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1472. esac
  1473. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1474. # have it work better.
  1475. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1476. # This warning was added in gcc 4.3, but it appears to generate
  1477. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1478. #CFLAGS="$CFLAGS -Wlogical-op"
  1479. m4_foreach_w([warning_flag], [
  1480. -Waddress
  1481. -Waddress-of-array-temporary
  1482. -Waddress-of-temporary
  1483. -Wambiguous-macro
  1484. -Wanonymous-pack-parens
  1485. -Warc
  1486. -Warc-abi
  1487. -Warc-bridge-casts-disallowed-in-nonarc
  1488. -Warc-maybe-repeated-use-of-weak
  1489. -Warc-performSelector-leaks
  1490. -Warc-repeated-use-of-weak
  1491. -Warray-bounds
  1492. -Warray-bounds-pointer-arithmetic
  1493. -Wasm
  1494. -Wasm-operand-widths
  1495. -Watomic-properties
  1496. -Watomic-property-with-user-defined-accessor
  1497. -Wauto-import
  1498. -Wauto-storage-class
  1499. -Wauto-var-id
  1500. -Wavailability
  1501. -Wbackslash-newline-escape
  1502. -Wbad-array-new-length
  1503. -Wbind-to-temporary-copy
  1504. -Wbitfield-constant-conversion
  1505. -Wbool-conversion
  1506. -Wbool-conversions
  1507. -Wbuiltin-requires-header
  1508. -Wchar-align
  1509. -Wcompare-distinct-pointer-types
  1510. -Wcomplex-component-init
  1511. -Wconditional-type-mismatch
  1512. -Wconfig-macros
  1513. -Wconstant-conversion
  1514. -Wconstant-logical-operand
  1515. -Wconstexpr-not-const
  1516. -Wcustom-atomic-properties
  1517. -Wdangling-field
  1518. -Wdangling-initializer-list
  1519. -Wdate-time
  1520. -Wdelegating-ctor-cycles
  1521. -Wdeprecated-implementations
  1522. -Wdeprecated-register
  1523. -Wdirect-ivar-access
  1524. -Wdiscard-qual
  1525. -Wdistributed-object-modifiers
  1526. -Wdivision-by-zero
  1527. -Wdollar-in-identifier-extension
  1528. -Wdouble-promotion
  1529. -Wduplicate-decl-specifier
  1530. -Wduplicate-enum
  1531. -Wduplicate-method-arg
  1532. -Wduplicate-method-match
  1533. -Wduplicated-cond
  1534. -Wdynamic-class-memaccess
  1535. -Wembedded-directive
  1536. -Wempty-translation-unit
  1537. -Wenum-conversion
  1538. -Wexit-time-destructors
  1539. -Wexplicit-ownership-type
  1540. -Wextern-initializer
  1541. -Wextra
  1542. -Wextra-semi
  1543. -Wextra-tokens
  1544. -Wflexible-array-extensions
  1545. -Wfloat-conversion
  1546. -Wformat-non-iso
  1547. -Wfour-char-constants
  1548. -Wgcc-compat
  1549. -Wglobal-constructors
  1550. -Wgnu-array-member-paren-init
  1551. -Wgnu-designator
  1552. -Wgnu-static-float-init
  1553. -Wheader-guard
  1554. -Wheader-hygiene
  1555. -Widiomatic-parentheses
  1556. -Wignored-attributes
  1557. -Wimplicit-atomic-properties
  1558. -Wimplicit-conversion-floating-point-to-bool
  1559. -Wimplicit-exception-spec-mismatch
  1560. -Wimplicit-fallthrough
  1561. -Wimplicit-fallthrough-per-function
  1562. -Wimplicit-retain-self
  1563. -Wimport-preprocessor-directive-pedantic
  1564. -Wincompatible-library-redeclaration
  1565. -Wincompatible-pointer-types-discards-qualifiers
  1566. -Wincomplete-implementation
  1567. -Wincomplete-module
  1568. -Wincomplete-umbrella
  1569. -Winit-self
  1570. -Wint-conversions
  1571. -Wint-to-void-pointer-cast
  1572. -Winteger-overflow
  1573. -Winvalid-constexpr
  1574. -Winvalid-iboutlet
  1575. -Winvalid-noreturn
  1576. -Winvalid-pp-token
  1577. -Winvalid-source-encoding
  1578. -Winvalid-token-paste
  1579. -Wknr-promoted-parameter
  1580. -Wlanguage-extension-token
  1581. -Wlarge-by-value-copy
  1582. -Wliteral-conversion
  1583. -Wliteral-range
  1584. -Wlocal-type-template-args
  1585. -Wlogical-op
  1586. -Wloop-analysis
  1587. -Wmain-return-type
  1588. -Wmalformed-warning-check
  1589. -Wmethod-signatures
  1590. -Wmicrosoft
  1591. -Wmicrosoft-exists
  1592. -Wmismatched-parameter-types
  1593. -Wmismatched-return-types
  1594. -Wmissing-field-initializers
  1595. -Wmissing-format-attribute
  1596. -Wmissing-noreturn
  1597. -Wmissing-selector-name
  1598. -Wmissing-sysroot
  1599. -Wmissing-variable-declarations
  1600. -Wmodule-conflict
  1601. -Wnested-anon-types
  1602. -Wnewline-eof
  1603. -Wnon-literal-null-conversion
  1604. -Wnon-pod-varargs
  1605. -Wnonportable-cfstrings
  1606. -Wnormalized=id
  1607. -Wnull-arithmetic
  1608. -Wnull-character
  1609. -Wnull-conversion
  1610. -Wnull-dereference
  1611. -Wout-of-line-declaration
  1612. -Wover-aligned
  1613. -Woverlength-strings
  1614. -Woverride-init
  1615. -Woverriding-method-mismatch
  1616. -Wpointer-type-mismatch
  1617. -Wpredefined-identifier-outside-function
  1618. -Wprotocol-property-synthesis-ambiguity
  1619. -Wreadonly-iboutlet-property
  1620. -Wreadonly-setter-attrs
  1621. -Wreceiver-expr
  1622. -Wreceiver-forward-class
  1623. -Wreceiver-is-weak
  1624. -Wreinterpret-base-class
  1625. -Wrequires-super-attribute
  1626. -Wreserved-user-defined-literal
  1627. -Wreturn-stack-address
  1628. -Wsection
  1629. -Wselector-type-mismatch
  1630. -Wsentinel
  1631. -Wserialized-diagnostics
  1632. -Wshadow
  1633. -Wshift-count-negative
  1634. -Wshift-count-overflow
  1635. -Wshift-negative-value
  1636. -Wshift-overflow=2
  1637. -Wshift-sign-overflow
  1638. -Wshorten-64-to-32
  1639. -Wsizeof-array-argument
  1640. -Wsource-uses-openmp
  1641. -Wstatic-float-init
  1642. -Wstatic-in-inline
  1643. -Wstatic-local-in-inline
  1644. -Wstrict-overflow=1
  1645. -Wstring-compare
  1646. -Wstring-conversion
  1647. -Wstrlcpy-strlcat-size
  1648. -Wstrncat-size
  1649. -Wsuggest-attribute=format
  1650. -Wsuggest-attribute=noreturn
  1651. -Wsuper-class-method-mismatch
  1652. -Wswitch-bool
  1653. -Wsync-nand
  1654. -Wtautological-constant-out-of-range-compare
  1655. -Wtentative-definition-incomplete-type
  1656. -Wtrampolines
  1657. -Wtype-safety
  1658. -Wtypedef-redefinition
  1659. -Wtypename-missing
  1660. -Wundefined-inline
  1661. -Wundefined-internal
  1662. -Wundefined-reinterpret-cast
  1663. -Wunicode
  1664. -Wunicode-whitespace
  1665. -Wunknown-warning-option
  1666. -Wunnamed-type-template-args
  1667. -Wunneeded-member-function
  1668. -Wunsequenced
  1669. -Wunsupported-visibility
  1670. -Wunused-but-set-parameter
  1671. -Wunused-but-set-variable
  1672. -Wunused-command-line-argument
  1673. -Wunused-const-variable=2
  1674. -Wunused-exception-parameter
  1675. -Wunused-local-typedefs
  1676. -Wunused-member-function
  1677. -Wunused-sanitize-argument
  1678. -Wunused-volatile-lvalue
  1679. -Wuser-defined-literals
  1680. -Wvariadic-macros
  1681. -Wvector-conversion
  1682. -Wvector-conversions
  1683. -Wvexing-parse
  1684. -Wvisibility
  1685. -Wvla-extension
  1686. -Wzero-length-array
  1687. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1688. dnl We should re-enable this in some later version. Clang doesn't
  1689. dnl mind, but it causes trouble with GCC.
  1690. dnl -Wstrict-overflow=2
  1691. dnl These seem to require annotations that we don't currently use,
  1692. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1693. dnl -Wthread-safety
  1694. dnl -Wthread-safety-analysis
  1695. dnl -Wthread-safety-attributes
  1696. dnl -Wthread-safety-beta
  1697. dnl -Wthread-safety-precise
  1698. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1699. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1700. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1701. CFLAGS="$CFLAGS -Wwrite-strings"
  1702. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1703. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1704. CFLAGS="$CFLAGS -Wunused-parameter "
  1705. # These interfere with building main() { return 0; }, which autoconf
  1706. # likes to use as its default program.
  1707. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1708. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1709. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1710. fi
  1711. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1712. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1713. fi
  1714. if test "x$enable_fatal_warnings" = "xyes"; then
  1715. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1716. # default autoconf programs are full of errors.
  1717. CFLAGS="$CFLAGS -Werror"
  1718. fi
  1719. fi
  1720. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1721. case "$host_os" in
  1722. darwin*)
  1723. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1724. esac
  1725. fi
  1726. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1727. AC_CONFIG_FILES([
  1728. Doxyfile
  1729. Makefile
  1730. contrib/dist/suse/tor.sh
  1731. contrib/operator-tools/tor.logrotate
  1732. contrib/dist/tor.sh
  1733. contrib/dist/torctl
  1734. contrib/dist/tor.service
  1735. src/config/torrc.sample
  1736. src/config/torrc.minimal
  1737. scripts/maint/checkOptionDocs.pl
  1738. scripts/maint/updateVersions.pl
  1739. ])
  1740. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1741. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1742. for file in $regular_mans ; do
  1743. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1744. echo "==================================";
  1745. echo;
  1746. echo "Building Tor has failed since manpages cannot be built.";
  1747. echo;
  1748. echo "You need asciidoc installed to be able to build the manpages.";
  1749. echo "To build without manpages, use the --disable-asciidoc argument";
  1750. echo "when calling configure.";
  1751. echo;
  1752. echo "==================================";
  1753. exit 1;
  1754. fi
  1755. done
  1756. fi
  1757. if test "$fragile_hardening" = "yes"; then
  1758. AC_MSG_WARN([
  1759. ============
  1760. Warning! Building Tor with --enable-fragile-hardening (also known as
  1761. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  1762. other kinds of attacks easier. A Tor instance build with this option will be
  1763. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  1764. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  1765. denial of service attacks. For more information, see
  1766. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  1767. ============
  1768. ])
  1769. fi
  1770. AC_OUTPUT