configure.ac 60 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],[0.3.0.1-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])
  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. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  45. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  46. fi
  47. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  48. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  49. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  50. if test "$enable_static_tor" = "yes"; then
  51. enable_static_libevent="yes";
  52. enable_static_openssl="yes";
  53. enable_static_zlib="yes";
  54. CFLAGS="$CFLAGS -static"
  55. fi
  56. if test "$enable_system_torrc" = "no"; then
  57. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  58. [Defined if we're not going to look for a torrc in SYSCONF])
  59. fi
  60. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  61. AC_ARG_ENABLE(asciidoc,
  62. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  63. [case "${enableval}" in
  64. "yes") asciidoc=true ;;
  65. "no") asciidoc=false ;;
  66. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  67. esac], [asciidoc=true])
  68. # systemd notify support
  69. AC_ARG_ENABLE(systemd,
  70. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  71. [case "${enableval}" in
  72. "yes") systemd=true ;;
  73. "no") systemd=false ;;
  74. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  75. esac], [systemd=auto])
  76. # systemd support
  77. if test "x$enable_systemd" = "xno"; then
  78. have_systemd=no;
  79. else
  80. PKG_CHECK_MODULES(SYSTEMD,
  81. [libsystemd-daemon],
  82. have_systemd=yes,
  83. have_systemd=no)
  84. if test "x$have_systemd" = "xno"; then
  85. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  86. PKG_CHECK_MODULES(SYSTEMD,
  87. [libsystemd],
  88. have_systemd=yes,
  89. have_systemd=no)
  90. fi
  91. fi
  92. if test "x$have_systemd" = "xyes"; then
  93. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  94. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  95. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  96. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  97. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  98. fi
  99. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  100. AC_SUBST(TOR_SYSTEMD_LIBS)
  101. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  102. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  103. fi
  104. case "$host" in
  105. *-*-solaris* )
  106. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  107. ;;
  108. esac
  109. AC_ARG_ENABLE(gcc-warnings,
  110. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  111. AC_ARG_ENABLE(fatal-warnings,
  112. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  113. AC_ARG_ENABLE(gcc-warnings-advisory,
  114. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  115. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  116. AC_ARG_ENABLE(gcc-hardening,
  117. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  118. AC_ARG_ENABLE(expensive-hardening,
  119. AS_HELP_STRING(--enable-expensive-hardening, [enable more expensive compiler hardening; makes Tor slower]))
  120. dnl Linker hardening options
  121. dnl Currently these options are ELF specific - you can't use this with MacOSX
  122. AC_ARG_ENABLE(linker-hardening,
  123. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  124. AC_ARG_ENABLE(local-appdata,
  125. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  126. if test "$enable_local_appdata" = "yes"; then
  127. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  128. [Defined if we default to host local appdata paths on Windows])
  129. fi
  130. # Tor2web mode flag
  131. AC_ARG_ENABLE(tor2web-mode,
  132. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  133. [if test "x$enableval" = "xyes"; then
  134. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  135. fi])
  136. AC_ARG_ENABLE(tool-name-check,
  137. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  138. AC_ARG_ENABLE(seccomp,
  139. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  140. AC_ARG_ENABLE(libscrypt,
  141. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  142. dnl check for the correct "ar" when cross-compiling
  143. AN_MAKEVAR([AR], [AC_PROG_AR])
  144. AN_PROGRAM([ar], [AC_PROG_AR])
  145. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [ar])])
  146. AC_PROG_AR
  147. dnl Check whether the above macro has settled for a simply named tool even
  148. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  149. dnl because that will find any cc on the system, not only the cross-compiler,
  150. dnl and then verify that a binary built with this compiler runs on the
  151. dnl build system. It will then come to the false conclusion that we're not
  152. dnl cross-compiling.
  153. if test "x$enable_tool_name_check" != "xno"; then
  154. if test "x$ac_tool_warned" = "xyes"; then
  155. 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.)])
  156. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  157. 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.)])
  158. fi
  159. fi
  160. AC_PROG_CC
  161. AC_PROG_CPP
  162. AC_PROG_MAKE_SET
  163. AC_PROG_RANLIB
  164. AC_ARG_VAR([PERL], [path to Perl binary])
  165. AC_CHECK_PROGS([PERL], [perl])
  166. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  167. dnl autoconf 2.59 appears not to support AC_PROG_SED
  168. AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
  169. dnl check for asciidoc and a2x
  170. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  171. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  172. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  173. AM_PROG_CC_C_O
  174. AC_PROG_CC_C99
  175. AC_ARG_VAR([PYTHON], [path to Python binary])
  176. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  177. if test "x$PYTHON" = "x"; then
  178. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  179. fi
  180. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  181. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  182. AC_C_FLEXIBLE_ARRAY_MEMBER
  183. ], [
  184. dnl Maybe we've got an old autoconf...
  185. AC_CACHE_CHECK([for flexible array members],
  186. tor_cv_c_flexarray,
  187. [AC_COMPILE_IFELSE(
  188. AC_LANG_PROGRAM([
  189. struct abc { int a; char b[]; };
  190. ], [
  191. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  192. def->b[0] = 33;
  193. ]),
  194. [tor_cv_c_flexarray=yes],
  195. [tor_cv_c_flexarray=no])])
  196. if test "$tor_cv_flexarray" = "yes"; then
  197. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  198. else
  199. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  200. fi
  201. ])
  202. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  203. tor_cv_c_c99_decl,
  204. [AC_COMPILE_IFELSE(
  205. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  206. [tor_cv_c_c99_decl=yes],
  207. [tor_cv_c_c99_decl=no] )])
  208. if test "$tor_cv_c_c99_decl" != "yes"; then
  209. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  210. fi
  211. AC_CACHE_CHECK([for working C99 designated initializers],
  212. tor_cv_c_c99_designated_init,
  213. [AC_COMPILE_IFELSE(
  214. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  215. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  216. [tor_cv_c_c99_designated_init=yes],
  217. [tor_cv_c_c99_designated_init=no] )])
  218. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  219. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  220. fi
  221. TORUSER=_tor
  222. AC_ARG_WITH(tor-user,
  223. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  224. [
  225. TORUSER=$withval
  226. ]
  227. )
  228. AC_SUBST(TORUSER)
  229. TORGROUP=_tor
  230. AC_ARG_WITH(tor-group,
  231. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  232. [
  233. TORGROUP=$withval
  234. ]
  235. )
  236. AC_SUBST(TORGROUP)
  237. dnl If _WIN32 is defined and non-zero, we are building for win32
  238. AC_MSG_CHECKING([for win32])
  239. AC_RUN_IFELSE([AC_LANG_SOURCE([
  240. int main(int c, char **v) {
  241. #ifdef _WIN32
  242. #if _WIN32
  243. return 0;
  244. #else
  245. return 1;
  246. #endif
  247. #else
  248. return 2;
  249. #endif
  250. }])],
  251. bwin32=true; AC_MSG_RESULT([yes]),
  252. bwin32=false; AC_MSG_RESULT([no]),
  253. bwin32=cross; AC_MSG_RESULT([cross])
  254. )
  255. if test "$bwin32" = "cross"; then
  256. AC_MSG_CHECKING([for win32 (cross)])
  257. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  258. #ifdef _WIN32
  259. int main(int c, char **v) {return 0;}
  260. #else
  261. #error
  262. int main(int c, char **v) {return x(y);}
  263. #endif
  264. ])],
  265. bwin32=true; AC_MSG_RESULT([yes]),
  266. bwin32=false; AC_MSG_RESULT([no]))
  267. fi
  268. AH_BOTTOM([
  269. #ifdef _WIN32
  270. /* Defined to access windows functions and definitions for >=WinXP */
  271. # ifndef WINVER
  272. # define WINVER 0x0501
  273. # endif
  274. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  275. # ifndef _WIN32_WINNT
  276. # define _WIN32_WINNT 0x0501
  277. # endif
  278. /* Defined to avoid including some windows headers as part of Windows.h */
  279. # ifndef WIN32_LEAN_AND_MEAN
  280. # define WIN32_LEAN_AND_MEAN 1
  281. # endif
  282. #endif
  283. ])
  284. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  285. dnl Enable C99 when compiling with MIPSpro
  286. AC_MSG_CHECKING([for MIPSpro compiler])
  287. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  288. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  289. #error
  290. return x(y);
  291. #endif
  292. ])],
  293. bmipspro=false; AC_MSG_RESULT(no),
  294. bmipspro=true; AC_MSG_RESULT(yes))
  295. if test "$bmipspro" = "true"; then
  296. CFLAGS="$CFLAGS -c99"
  297. fi
  298. AC_C_BIGENDIAN
  299. AC_SEARCH_LIBS(socket, [socket network])
  300. AC_SEARCH_LIBS(gethostbyname, [nsl])
  301. AC_SEARCH_LIBS(dlopen, [dl])
  302. AC_SEARCH_LIBS(inet_aton, [resolv])
  303. AC_SEARCH_LIBS(backtrace, [execinfo])
  304. saved_LIBS="$LIBS"
  305. AC_SEARCH_LIBS([clock_gettime], [rt])
  306. if test "$LIBS" != "$saved_LIBS"; then
  307. # Looks like we need -lrt for clock_gettime().
  308. have_rt=yes
  309. fi
  310. AC_SEARCH_LIBS(pthread_create, [pthread])
  311. AC_SEARCH_LIBS(pthread_detach, [pthread])
  312. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  313. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  314. AC_CHECK_FUNCS(
  315. _NSGetEnviron \
  316. RtlSecureZeroMemory \
  317. SecureZeroMemory \
  318. accept4 \
  319. backtrace \
  320. backtrace_symbols_fd \
  321. eventfd \
  322. explicit_bzero \
  323. timingsafe_memcmp \
  324. flock \
  325. ftime \
  326. getaddrinfo \
  327. getifaddrs \
  328. getpass \
  329. getrlimit \
  330. gettimeofday \
  331. gmtime_r \
  332. htonll \
  333. inet_aton \
  334. ioctl \
  335. issetugid \
  336. llround \
  337. localtime_r \
  338. lround \
  339. memmem \
  340. memset_s \
  341. pipe \
  342. pipe2 \
  343. prctl \
  344. readpassphrase \
  345. rint \
  346. sigaction \
  347. socketpair \
  348. statvfs \
  349. strlcat \
  350. strlcpy \
  351. strnlen \
  352. strptime \
  353. strtok_r \
  354. strtoull \
  355. sysconf \
  356. sysctl \
  357. truncate \
  358. uname \
  359. usleep \
  360. vasprintf \
  361. _vscprintf
  362. )
  363. # Apple messed up when they added two functions functions in Sierra: they
  364. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  365. # checks. So we should only probe for those functions if we are sure that we
  366. # are not targetting OSX 10.11 or earlier.
  367. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  368. AC_TRY_COMPILE([
  369. #ifdef __APPLE__
  370. # include <AvailabilityMacros.h>
  371. # ifndef MAC_OS_X_VERSION_10_12
  372. # define MAC_OS_X_VERSION_10_12 101200
  373. # endif
  374. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  375. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  376. # error "Running on Mac OSX 10.11 or earlier"
  377. # endif
  378. # endif
  379. #endif
  380. ], [],
  381. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  382. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  383. if test "$on_macos_pre_10_12" = "no"; then
  384. AC_CHECK_FUNCS(
  385. clock_gettime \
  386. getentropy \
  387. )
  388. fi
  389. if test "$bwin32" != "true"; then
  390. AC_CHECK_HEADERS(pthread.h)
  391. AC_CHECK_FUNCS(pthread_create)
  392. AC_CHECK_FUNCS(pthread_condattr_setclock)
  393. fi
  394. if test "$bwin32" = "true"; then
  395. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  396. #include <windows.h>
  397. #include <conio.h>
  398. #include <wchar.h>
  399. ])
  400. fi
  401. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  402. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  403. dnl ------------------------------------------------------
  404. dnl Where do you live, libevent? And how do we call you?
  405. if test "$bwin32" = "true"; then
  406. TOR_LIB_WS32=-lws2_32
  407. TOR_LIB_IPHLPAPI=-liphlpapi
  408. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  409. # think it's actually necessary.
  410. TOR_LIB_GDI=-lgdi32
  411. else
  412. TOR_LIB_WS32=
  413. TOR_LIB_GDI=
  414. fi
  415. AC_SUBST(TOR_LIB_WS32)
  416. AC_SUBST(TOR_LIB_GDI)
  417. AC_SUBST(TOR_LIB_IPHLPAPI)
  418. tor_libevent_pkg_redhat="libevent"
  419. tor_libevent_pkg_debian="libevent-dev"
  420. tor_libevent_devpkg_redhat="libevent-devel"
  421. tor_libevent_devpkg_debian="libevent-dev"
  422. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  423. dnl linking for static builds.
  424. STATIC_LIBEVENT_FLAGS=""
  425. if test "$enable_static_libevent" = "yes"; then
  426. if test "$have_rt" = "yes"; then
  427. STATIC_LIBEVENT_FLAGS=" -lrt "
  428. fi
  429. fi
  430. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  431. #ifdef _WIN32
  432. #include <winsock2.h>
  433. #endif
  434. #include <sys/time.h>
  435. #include <sys/types.h>
  436. #include <event2/event.h>], [
  437. #ifdef _WIN32
  438. #include <winsock2.h>
  439. #endif
  440. struct event_base;
  441. struct event_base *event_base_new(void);],
  442. [
  443. #ifdef _WIN32
  444. {WSADATA d; WSAStartup(0x101,&d); }
  445. #endif
  446. event_base_new();
  447. ], [--with-libevent-dir], [/opt/libevent])
  448. dnl Determine the incantation needed to link libevent.
  449. save_LIBS="$LIBS"
  450. save_LDFLAGS="$LDFLAGS"
  451. save_CPPFLAGS="$CPPFLAGS"
  452. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  453. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  454. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  455. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  456. if test "$enable_static_libevent" = "yes"; then
  457. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  458. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  459. else
  460. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  461. fi
  462. else
  463. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  464. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  465. 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"))
  466. if test "$ac_cv_search_event_new" != "none required"; then
  467. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  468. fi
  469. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  470. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  471. fi
  472. else
  473. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  474. fi
  475. fi
  476. dnl Now check for particular libevent functions.
  477. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  478. evutil_secure_rng_add_bytes \
  479. ])
  480. LIBS="$save_LIBS"
  481. LDFLAGS="$save_LDFLAGS"
  482. CPPFLAGS="$save_CPPFLAGS"
  483. dnl Check that libevent is at least at version 2.0.10, the first stable
  484. dnl release of its series
  485. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  486. AC_MSG_CHECKING([whether Libevent is new enough])
  487. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  488. #include <event2/event.h>
  489. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  490. #error
  491. int x = y(zz);
  492. #else
  493. int x = 1;
  494. #endif
  495. ])], [ AC_MSG_RESULT([yes]) ],
  496. [ AC_MSG_RESULT([no])
  497. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  498. LIBS="$save_LIBS"
  499. LDFLAGS="$save_LDFLAGS"
  500. CPPFLAGS="$save_CPPFLAGS"
  501. AC_SUBST(TOR_LIBEVENT_LIBS)
  502. dnl ------------------------------------------------------
  503. dnl Where do you live, libm?
  504. dnl On some platforms (Haiku/BeOS) the math library is
  505. dnl part of libroot. In which case don't link against lm
  506. TOR_LIB_MATH=""
  507. save_LIBS="$LIBS"
  508. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  509. if test "$ac_cv_search_pow" != "none required"; then
  510. TOR_LIB_MATH="$ac_cv_search_pow"
  511. fi
  512. LIBS="$save_LIBS"
  513. AC_SUBST(TOR_LIB_MATH)
  514. dnl ------------------------------------------------------
  515. dnl Where do you live, openssl? And how do we call you?
  516. tor_openssl_pkg_redhat="openssl"
  517. tor_openssl_pkg_debian="libssl-dev"
  518. tor_openssl_devpkg_redhat="openssl-devel"
  519. tor_openssl_devpkg_debian="libssl-dev"
  520. ALT_openssl_WITHVAL=""
  521. AC_ARG_WITH(ssl-dir,
  522. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  523. [
  524. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  525. ALT_openssl_WITHVAL="$withval"
  526. fi
  527. ])
  528. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  529. [#include <openssl/rand.h>],
  530. [void RAND_add(const void *buf, int num, double entropy);],
  531. [RAND_add((void*)0,0,0);], [],
  532. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  533. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  534. if test "$enable_static_openssl" = "yes"; then
  535. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  536. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  537. else
  538. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  539. fi
  540. else
  541. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  542. fi
  543. AC_SUBST(TOR_OPENSSL_LIBS)
  544. dnl Now check for particular openssl functions.
  545. save_LIBS="$LIBS"
  546. save_LDFLAGS="$LDFLAGS"
  547. save_CPPFLAGS="$CPPFLAGS"
  548. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  549. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  550. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  551. AC_TRY_COMPILE([
  552. #include <openssl/opensslv.h>
  553. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  554. #error "too old"
  555. #endif
  556. ], [],
  557. [ : ],
  558. [ AC_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  559. AC_TRY_COMPILE([
  560. #include <openssl/opensslv.h>
  561. #include <openssl/evp.h>
  562. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  563. #error "no ECC"
  564. #endif
  565. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  566. #error "curves unavailable"
  567. #endif
  568. ], [],
  569. [ : ],
  570. [ AC_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  571. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  572. [#include <openssl/ssl.h>
  573. ])
  574. AC_CHECK_FUNCS([ \
  575. SSL_SESSION_get_master_key \
  576. SSL_get_server_random \
  577. SSL_get_client_ciphers \
  578. SSL_get_client_random \
  579. SSL_CIPHER_find \
  580. TLS_method
  581. ])
  582. dnl Check if OpenSSL has scrypt implementation.
  583. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  584. LIBS="$save_LIBS"
  585. LDFLAGS="$save_LDFLAGS"
  586. CPPFLAGS="$save_CPPFLAGS"
  587. dnl ------------------------------------------------------
  588. dnl Where do you live, zlib? And how do we call you?
  589. tor_zlib_pkg_redhat="zlib"
  590. tor_zlib_pkg_debian="zlib1g"
  591. tor_zlib_devpkg_redhat="zlib-devel"
  592. tor_zlib_devpkg_debian="zlib1g-dev"
  593. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  594. [#include <zlib.h>],
  595. [const char * zlibVersion(void);],
  596. [zlibVersion();], [--with-zlib-dir],
  597. [/opt/zlib])
  598. if test "$enable_static_zlib" = "yes"; then
  599. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  600. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  601. using --enable-static-zlib")
  602. else
  603. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  604. fi
  605. else
  606. TOR_ZLIB_LIBS="-lz"
  607. fi
  608. AC_SUBST(TOR_ZLIB_LIBS)
  609. dnl ----------------------------------------------------------------------
  610. dnl Check if libcap is available for capabilities.
  611. tor_cap_pkg_debian="libcap2"
  612. tor_cap_pkg_redhat="libcap"
  613. tor_cap_devpkg_debian="libcap-dev"
  614. tor_cap_devpkg_redhat="libcap-devel"
  615. AC_CHECK_LIB([cap], [cap_init], [],
  616. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  617. )
  618. AC_CHECK_FUNCS(cap_set_proc)
  619. dnl ---------------------------------------------------------------------
  620. dnl Now that we know about our major libraries, we can check for compiler
  621. dnl and linker hardening options. We need to do this with the libraries known,
  622. dnl since sometimes the linker will like an option but not be willing to
  623. dnl use it with a build of a library.
  624. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  625. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  626. CFLAGS_FTRAPV=
  627. CFLAGS_FWRAPV=
  628. CFLAGS_ASAN=
  629. CFLAGS_UBSAN=
  630. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  631. #if !defined(__clang__)
  632. #error
  633. #endif])], have_clang=yes, have_clang=no)
  634. if test "x$enable_gcc_hardening" != "xno"; then
  635. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  636. if test "x$have_clang" = "xyes"; then
  637. TOR_CHECK_CFLAGS(-Qunused-arguments)
  638. fi
  639. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  640. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  641. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  642. m4_ifdef([AS_VAR_IF],[
  643. AS_VAR_IF(can_compile, [yes],
  644. AS_VAR_IF(can_link, [yes],
  645. [],
  646. 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.)]))
  647. )])
  648. AS_VAR_POPDEF([can_link])
  649. AS_VAR_POPDEF([can_compile])
  650. TOR_CHECK_CFLAGS(-Wstack-protector)
  651. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  652. if test "$bwin32" = "false"; then
  653. TOR_CHECK_CFLAGS(-fPIE)
  654. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  655. fi
  656. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  657. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  658. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  659. AC_MSG_WARN([The compiler supports -ftrapv, but for some reason I was not able to link with -ftrapv. Are you missing run-time support? Run-time hardening will not work as well as it should.])
  660. fi
  661. fi
  662. if test "x$enable_expensive_hardening" = "xyes"; then
  663. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  664. AC_MSG_ERROR([You requested expensive hardening, but the compiler does not seem to support -ftrapv.])
  665. fi
  666. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  667. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  668. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  669. fi
  670. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  671. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  672. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  673. fi
  674. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  675. fi
  676. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  677. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  678. mulodi_fixes_ftrapv=no
  679. if test "$have_clang" = "yes"; then
  680. saved_CFLAGS="$CFLAGS"
  681. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  682. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  683. AC_LINK_IFELSE([
  684. AC_LANG_SOURCE([[
  685. #include <stdint.h>
  686. #include <stdlib.h>
  687. int main(int argc, char **argv)
  688. {
  689. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  690. * (int64_t)atoi(argv[3]);
  691. return x == 9;
  692. } ]])],
  693. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  694. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  695. if test "$ftrapv_can_link" = "no"; then
  696. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  697. AC_LINK_IFELSE([
  698. AC_LANG_SOURCE([[
  699. #include <stdint.h>
  700. #include <stdlib.h>
  701. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  702. *overflow=0;
  703. return a;
  704. }
  705. int main(int argc, char **argv)
  706. {
  707. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  708. * (int64_t)atoi(argv[3]);
  709. return x == 9;
  710. } ]])],
  711. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  712. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  713. fi
  714. CFLAGS="$saved_CFLAGS"
  715. fi
  716. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  717. dnl These cflags add bunches of branches, and we haven't been able to
  718. dnl persuade ourselves that they're suitable for code that needs to be
  719. dnl constant time.
  720. AC_SUBST(CFLAGS_BUGTRAP)
  721. dnl These cflags are variant ones sutable for code that needs to be
  722. dnl constant-time.
  723. AC_SUBST(CFLAGS_CONSTTIME)
  724. if test "x$enable_linker_hardening" != "xno"; then
  725. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  726. fi
  727. # For backtrace support
  728. TOR_CHECK_LDFLAGS(-rdynamic)
  729. dnl ------------------------------------------------------
  730. dnl Now see if we have a -fomit-frame-pointer compiler option.
  731. saved_CFLAGS="$CFLAGS"
  732. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  733. F_OMIT_FRAME_POINTER=''
  734. if test "$saved_CFLAGS" != "$CFLAGS"; then
  735. if test "x$enable_expensive_hardening" != "xyes"; then
  736. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  737. fi
  738. fi
  739. CFLAGS="$saved_CFLAGS"
  740. AC_SUBST(F_OMIT_FRAME_POINTER)
  741. dnl ------------------------------------------------------
  742. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  743. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  744. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  745. dnl code will work.
  746. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  747. dnl ============================================================
  748. dnl Check for libseccomp
  749. if test "x$enable_seccomp" != "xno"; then
  750. AC_CHECK_HEADERS([seccomp.h])
  751. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  752. fi
  753. dnl ============================================================
  754. dnl Check for libscrypt
  755. if test "x$enable_libscrypt" != "xno"; then
  756. AC_CHECK_HEADERS([libscrypt.h])
  757. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  758. AC_CHECK_FUNCS([libscrypt_scrypt])
  759. fi
  760. dnl ============================================================
  761. dnl We need an implementation of curve25519.
  762. dnl set these defaults.
  763. build_curve25519_donna=no
  764. build_curve25519_donna_c64=no
  765. use_curve25519_donna=no
  766. use_curve25519_nacl=no
  767. CURVE25519_LIBS=
  768. dnl The best choice is using curve25519-donna-c64, but that requires
  769. dnl that we
  770. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  771. tor_cv_can_use_curve25519_donna_c64,
  772. [AC_RUN_IFELSE(
  773. [AC_LANG_PROGRAM([dnl
  774. #include <stdint.h>
  775. typedef unsigned uint128_t __attribute__((mode(TI)));
  776. int func(uint64_t a, uint64_t b) {
  777. uint128_t c = ((uint128_t)a) * b;
  778. int ok = ((uint64_t)(c>>96)) == 522859 &&
  779. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  780. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  781. (((uint64_t)(c))&0xffffffffL) == 0;
  782. return ok;
  783. }
  784. ], [dnl
  785. int ok = func( ((uint64_t)2000000000) * 1000000000,
  786. ((uint64_t)1234567890) << 24);
  787. return !ok;
  788. ])],
  789. [tor_cv_can_use_curve25519_donna_c64=yes],
  790. [tor_cv_can_use_curve25519_donna_c64=no],
  791. [AC_LINK_IFELSE(
  792. [AC_LANG_PROGRAM([dnl
  793. #include <stdint.h>
  794. typedef unsigned uint128_t __attribute__((mode(TI)));
  795. int func(uint64_t a, uint64_t b) {
  796. uint128_t c = ((uint128_t)a) * b;
  797. int ok = ((uint64_t)(c>>96)) == 522859 &&
  798. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  799. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  800. (((uint64_t)(c))&0xffffffffL) == 0;
  801. return ok;
  802. }
  803. ], [dnl
  804. int ok = func( ((uint64_t)2000000000) * 1000000000,
  805. ((uint64_t)1234567890) << 24);
  806. return !ok;
  807. ])],
  808. [tor_cv_can_use_curve25519_donna_c64=cross],
  809. [tor_cv_can_use_curve25519_donna_c64=no])])])
  810. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  811. nacl/crypto_scalarmult_curve25519.h])
  812. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  813. tor_cv_can_use_curve25519_nacl,
  814. [tor_saved_LIBS="$LIBS"
  815. LIBS="$LIBS -lnacl"
  816. AC_LINK_IFELSE(
  817. [AC_LANG_PROGRAM([dnl
  818. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  819. #include <crypto_scalarmult_curve25519.h>
  820. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  821. #include <nacl/crypto_scalarmult_curve25519.h>
  822. #endif
  823. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  824. #error Hey, this is the reference implementation! That's not fast.
  825. #endif
  826. ], [
  827. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  828. ])], [tor_cv_can_use_curve25519_nacl=yes],
  829. [tor_cv_can_use_curve25519_nacl=no])
  830. LIBS="$tor_saved_LIBS" ])
  831. dnl Okay, now we need to figure out which one to actually use. Fall back
  832. dnl to curve25519-donna.c
  833. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  834. build_curve25519_donna_c64=yes
  835. use_curve25519_donna=yes
  836. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  837. use_curve25519_nacl=yes
  838. CURVE25519_LIBS=-lnacl
  839. else
  840. build_curve25519_donna=yes
  841. use_curve25519_donna=yes
  842. fi
  843. if test "x$use_curve25519_donna" = "xyes"; then
  844. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  845. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  846. fi
  847. if test "x$use_curve25519_nacl" = "xyes"; then
  848. AC_DEFINE(USE_CURVE25519_NACL, 1,
  849. [Defined if we should use a curve25519 from nacl])
  850. fi
  851. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  852. test "x$build_curve25519_donna" = "xyes")
  853. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  854. test "x$build_curve25519_donna_c64" = "xyes")
  855. AC_SUBST(CURVE25519_LIBS)
  856. dnl Make sure to enable support for large off_t if available.
  857. AC_SYS_LARGEFILE
  858. AC_CHECK_HEADERS([assert.h \
  859. errno.h \
  860. fcntl.h \
  861. signal.h \
  862. string.h \
  863. sys/capability.h \
  864. sys/fcntl.h \
  865. sys/stat.h \
  866. sys/time.h \
  867. sys/types.h \
  868. time.h \
  869. unistd.h \
  870. arpa/inet.h \
  871. crt_externs.h \
  872. execinfo.h \
  873. grp.h \
  874. ifaddrs.h \
  875. inttypes.h \
  876. limits.h \
  877. linux/types.h \
  878. machine/limits.h \
  879. malloc.h \
  880. malloc/malloc.h \
  881. malloc_np.h \
  882. netdb.h \
  883. netinet/in.h \
  884. netinet/in6.h \
  885. pwd.h \
  886. readpassphrase.h \
  887. stdint.h \
  888. sys/eventfd.h \
  889. sys/file.h \
  890. sys/ioctl.h \
  891. sys/limits.h \
  892. sys/mman.h \
  893. sys/param.h \
  894. sys/prctl.h \
  895. sys/random.h \
  896. sys/resource.h \
  897. sys/select.h \
  898. sys/socket.h \
  899. sys/statvfs.h \
  900. sys/syscall.h \
  901. sys/sysctl.h \
  902. sys/syslimits.h \
  903. sys/time.h \
  904. sys/types.h \
  905. sys/un.h \
  906. sys/utime.h \
  907. sys/wait.h \
  908. syslog.h \
  909. utime.h])
  910. AC_CHECK_HEADERS(sys/param.h)
  911. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  912. [#ifdef HAVE_SYS_TYPES_H
  913. #include <sys/types.h>
  914. #endif
  915. #ifdef HAVE_SYS_SOCKET_H
  916. #include <sys/socket.h>
  917. #endif])
  918. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  919. [#ifdef HAVE_SYS_TYPES_H
  920. #include <sys/types.h>
  921. #endif
  922. #ifdef HAVE_SYS_SOCKET_H
  923. #include <sys/socket.h>
  924. #endif
  925. #ifdef HAVE_NET_IF_H
  926. #include <net/if.h>
  927. #endif
  928. #ifdef HAVE_NETINET_IN_H
  929. #include <netinet/in.h>
  930. #endif])
  931. AC_CHECK_HEADERS(linux/if.h,[],[],
  932. [
  933. #ifdef HAVE_SYS_SOCKET_H
  934. #include <sys/socket.h>
  935. #endif
  936. ])
  937. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  938. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  939. [#ifdef HAVE_SYS_TYPES_H
  940. #include <sys/types.h>
  941. #endif
  942. #ifdef HAVE_SYS_SOCKET_H
  943. #include <sys/socket.h>
  944. #endif
  945. #ifdef HAVE_LIMITS_H
  946. #include <limits.h>
  947. #endif
  948. #ifdef HAVE_LINUX_TYPES_H
  949. #include <linux/types.h>
  950. #endif
  951. #ifdef HAVE_NETINET_IN6_H
  952. #include <netinet/in6.h>
  953. #endif
  954. #ifdef HAVE_NETINET_IN_H
  955. #include <netinet/in.h>
  956. #endif])
  957. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  958. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  959. [#ifdef HAVE_SYS_TYPES_H
  960. #include <sys/types.h>
  961. #endif
  962. #ifdef HAVE_SYS_SOCKET_H
  963. #include <sys/socket.h>
  964. #endif
  965. #ifdef HAVE_LIMITS_H
  966. #include <limits.h>
  967. #endif
  968. #ifdef HAVE_LINUX_TYPES_H
  969. #include <linux/types.h>
  970. #endif
  971. #ifdef HAVE_NETINET_IN6_H
  972. #include <netinet/in6.h>
  973. #endif
  974. #ifdef HAVE_NETINET_IN_H
  975. #include <netinet/in.h>
  976. #endif
  977. #ifdef HAVE_LINUX_IF_H
  978. #include <linux/if.h>
  979. #endif])
  980. transparent_ok=0
  981. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  982. transparent_ok=1
  983. fi
  984. if test "x$linux_netfilter_ipv4" = "x1"; then
  985. transparent_ok=1
  986. fi
  987. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  988. transparent_ok=1
  989. fi
  990. if test "x$transparent_ok" = "x1"; then
  991. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  992. case "$host" in
  993. *-*-openbsd* | *-*-bitrig*)
  994. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  995. esac
  996. else
  997. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  998. fi
  999. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1000. [#ifdef HAVE_SYS_TYPES_H
  1001. #include <sys/types.h>
  1002. #endif
  1003. #ifdef HAVE_SYS_TIME_H
  1004. #include <sys/time.h>
  1005. #endif])
  1006. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1007. dnl Watch out.
  1008. AC_CHECK_SIZEOF(int8_t)
  1009. AC_CHECK_SIZEOF(int16_t)
  1010. AC_CHECK_SIZEOF(int32_t)
  1011. AC_CHECK_SIZEOF(int64_t)
  1012. AC_CHECK_SIZEOF(uint8_t)
  1013. AC_CHECK_SIZEOF(uint16_t)
  1014. AC_CHECK_SIZEOF(uint32_t)
  1015. AC_CHECK_SIZEOF(uint64_t)
  1016. AC_CHECK_SIZEOF(intptr_t)
  1017. AC_CHECK_SIZEOF(uintptr_t)
  1018. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1019. AC_CHECK_SIZEOF(char)
  1020. AC_CHECK_SIZEOF(short)
  1021. AC_CHECK_SIZEOF(int)
  1022. AC_CHECK_SIZEOF(long)
  1023. AC_CHECK_SIZEOF(long long)
  1024. AC_CHECK_SIZEOF(__int64)
  1025. AC_CHECK_SIZEOF(void *)
  1026. AC_CHECK_SIZEOF(time_t)
  1027. AC_CHECK_SIZEOF(size_t)
  1028. AC_CHECK_SIZEOF(pid_t)
  1029. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1030. AC_PC_FROM_UCONTEXT([:])
  1031. dnl used to include sockaddr_storage, but everybody has that.
  1032. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1033. [#ifdef HAVE_SYS_TYPES_H
  1034. #include <sys/types.h>
  1035. #endif
  1036. #ifdef HAVE_NETINET_IN_H
  1037. #include <netinet/in.h>
  1038. #endif
  1039. #ifdef HAVE_NETINET_IN6_H
  1040. #include <netinet/in6.h>
  1041. #endif
  1042. #ifdef HAVE_SYS_SOCKET_H
  1043. #include <sys/socket.h>
  1044. #endif
  1045. #ifdef _WIN32
  1046. #define _WIN32_WINNT 0x0501
  1047. #define WIN32_LEAN_AND_MEAN
  1048. #include <winsock2.h>
  1049. #include <ws2tcpip.h>
  1050. #endif
  1051. ])
  1052. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1053. [#ifdef HAVE_SYS_TYPES_H
  1054. #include <sys/types.h>
  1055. #endif
  1056. #ifdef HAVE_NETINET_IN_H
  1057. #include <netinet/in.h>
  1058. #endif
  1059. #ifdef HAVE_NETINET_IN6_H
  1060. #include <netinet/in6.h>
  1061. #endif
  1062. #ifdef HAVE_SYS_SOCKET_H
  1063. #include <sys/socket.h>
  1064. #endif
  1065. #ifdef _WIN32
  1066. #define _WIN32_WINNT 0x0501
  1067. #define WIN32_LEAN_AND_MEAN
  1068. #include <winsock2.h>
  1069. #include <ws2tcpip.h>
  1070. #endif
  1071. ])
  1072. AC_CHECK_TYPES([rlim_t], , ,
  1073. [#ifdef HAVE_SYS_TYPES_H
  1074. #include <sys/types.h>
  1075. #endif
  1076. #ifdef HAVE_SYS_TIME_H
  1077. #include <sys/time.h>
  1078. #endif
  1079. #ifdef HAVE_SYS_RESOURCE_H
  1080. #include <sys/resource.h>
  1081. #endif
  1082. ])
  1083. AX_CHECK_SIGN([time_t],
  1084. [ : ],
  1085. [ : ], [
  1086. #ifdef HAVE_SYS_TYPES_H
  1087. #include <sys/types.h>
  1088. #endif
  1089. #ifdef HAVE_SYS_TIME_H
  1090. #include <sys/time.h>
  1091. #endif
  1092. #ifdef HAVE_TIME_H
  1093. #include <time.h>
  1094. #endif
  1095. ])
  1096. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1097. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1098. fi
  1099. AX_CHECK_SIGN([size_t],
  1100. [ tor_cv_size_t_signed=yes ],
  1101. [ tor_cv_size_t_signed=no ], [
  1102. #ifdef HAVE_SYS_TYPES_H
  1103. #include <sys/types.h>
  1104. #endif
  1105. ])
  1106. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1107. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1108. fi
  1109. AX_CHECK_SIGN([enum always],
  1110. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1111. [ : ], [
  1112. enum always { AAA, BBB, CCC };
  1113. ])
  1114. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1115. #ifdef HAVE_SYS_SOCKET_H
  1116. #include <sys/socket.h>
  1117. #endif
  1118. ])
  1119. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1120. AC_CHECK_SIZEOF(cell_t)
  1121. # Now make sure that NULL can be represented as zero bytes.
  1122. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1123. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1124. [[#include <stdlib.h>
  1125. #include <string.h>
  1126. #include <stdio.h>
  1127. #ifdef HAVE_STDDEF_H
  1128. #include <stddef.h>
  1129. #endif
  1130. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1131. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1132. [tor_cv_null_is_zero=yes],
  1133. [tor_cv_null_is_zero=no],
  1134. [tor_cv_null_is_zero=cross])])
  1135. if test "$tor_cv_null_is_zero" = "cross"; then
  1136. # Cross-compiling; let's hope that the target isn't raving mad.
  1137. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1138. fi
  1139. if test "$tor_cv_null_is_zero" != "no"; then
  1140. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1141. [Define to 1 iff memset(0) sets pointers to NULL])
  1142. fi
  1143. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1144. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1145. [[#include <stdlib.h>
  1146. #include <string.h>
  1147. #include <stdio.h>
  1148. #ifdef HAVE_STDDEF_H
  1149. #include <stddef.h>
  1150. #endif
  1151. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1152. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1153. [tor_cv_dbl0_is_zero=yes],
  1154. [tor_cv_dbl0_is_zero=no],
  1155. [tor_cv_dbl0_is_zero=cross])])
  1156. if test "$tor_cv_dbl0_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 0.0 can be represented as a sequence of 0-valued bytes.])
  1159. fi
  1160. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1161. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1162. [Define to 1 iff memset(0) sets doubles to 0.0])
  1163. fi
  1164. # And what happens when we malloc zero?
  1165. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1166. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1167. [[#include <stdlib.h>
  1168. #include <string.h>
  1169. #include <stdio.h>
  1170. #ifdef HAVE_STDDEF_H
  1171. #include <stddef.h>
  1172. #endif
  1173. int main () { return malloc(0)?0:1; }]])],
  1174. [tor_cv_malloc_zero_works=yes],
  1175. [tor_cv_malloc_zero_works=no],
  1176. [tor_cv_malloc_zero_works=cross])])
  1177. if test "$tor_cv_malloc_zero_works" = "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 we need to check malloc() arguments for 0.])
  1180. fi
  1181. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1182. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1183. [Define to 1 iff malloc(0) returns a pointer])
  1184. fi
  1185. # whether we seem to be in a 2s-complement world.
  1186. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1187. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1188. [[int main () { int problem = ((-99) != (~99)+1);
  1189. return problem ? 1 : 0; }]])],
  1190. [tor_cv_twos_complement=yes],
  1191. [tor_cv_twos_complement=no],
  1192. [tor_cv_twos_complement=cross])])
  1193. if test "$tor_cv_twos_complement" = "cross"; then
  1194. # Cross-compiling; let's hope that the target isn't raving mad.
  1195. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1196. fi
  1197. if test "$tor_cv_twos_complement" != "no"; then
  1198. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1199. [Define to 1 iff we represent negative integers with
  1200. two's complement])
  1201. fi
  1202. # What does shifting a negative value do?
  1203. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1204. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1205. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1206. [tor_cv_sign_extend=yes],
  1207. [tor_cv_sign_extend=no],
  1208. [tor_cv_sign_extend=cross])])
  1209. if test "$tor_cv_sign_extend" = "cross"; then
  1210. # Cross-compiling; let's hope that the target isn't raving mad.
  1211. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1212. fi
  1213. if test "$tor_cv_sign_extend" != "no"; then
  1214. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1215. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1216. fi
  1217. # Whether we should use the dmalloc memory allocation debugging library.
  1218. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1219. AC_ARG_WITH(dmalloc,
  1220. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1221. [if [[ "$withval" = "yes" ]]; then
  1222. dmalloc=1
  1223. AC_MSG_RESULT(yes)
  1224. else
  1225. dmalloc=1
  1226. AC_MSG_RESULT(no)
  1227. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1228. )
  1229. if [[ $dmalloc -eq 1 ]]; then
  1230. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1231. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1232. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1233. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1234. fi
  1235. AC_ARG_WITH(tcmalloc,
  1236. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1237. [ tcmalloc=yes ], [ tcmalloc=no ])
  1238. if test "x$tcmalloc" = "xyes"; then
  1239. LDFLAGS="-ltcmalloc $LDFLAGS"
  1240. fi
  1241. using_custom_malloc=no
  1242. if test "x$enable_openbsd_malloc" = "xyes"; then
  1243. using_custom_malloc=yes
  1244. fi
  1245. if test "x$tcmalloc" = "xyes"; then
  1246. using_custom_malloc=yes
  1247. fi
  1248. if test "$using_custom_malloc" = "no"; then
  1249. AC_CHECK_FUNCS(mallinfo)
  1250. fi
  1251. # By default, we're going to assume we don't have mlockall()
  1252. # bionic and other platforms have various broken mlockall subsystems.
  1253. # Some systems don't have a working mlockall, some aren't linkable,
  1254. # and some have it but don't declare it.
  1255. AC_CHECK_FUNCS(mlockall)
  1256. AC_CHECK_DECLS([mlockall], , , [
  1257. #ifdef HAVE_SYS_MMAN_H
  1258. #include <sys/mman.h>
  1259. #endif])
  1260. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1261. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1262. # using macros
  1263. AC_CHECK_DECLS([getpagesize], , , [
  1264. #ifdef HAVE_UNISTD_H
  1265. #include <unistd.h>
  1266. #endif])
  1267. # Allow user to specify an alternate syslog facility
  1268. AC_ARG_WITH(syslog-facility,
  1269. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1270. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1271. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1272. AC_SUBST(LOGFACILITY)
  1273. # Check if we have getresuid and getresgid
  1274. AC_CHECK_FUNCS(getresuid getresgid)
  1275. # Check for gethostbyname_r in all its glorious incompatible versions.
  1276. # (This logic is based on that in Python's configure.in)
  1277. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1278. [Define this if you have any gethostbyname_r()])
  1279. AC_CHECK_FUNC(gethostbyname_r, [
  1280. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1281. OLD_CFLAGS=$CFLAGS
  1282. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1283. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1284. #include <netdb.h>
  1285. ], [[
  1286. char *cp1, *cp2;
  1287. struct hostent *h1, *h2;
  1288. int i1, i2;
  1289. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1290. ]])],[
  1291. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1292. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1293. [Define this if gethostbyname_r takes 6 arguments])
  1294. AC_MSG_RESULT(6)
  1295. ], [
  1296. AC_TRY_COMPILE([
  1297. #include <netdb.h>
  1298. ], [
  1299. char *cp1, *cp2;
  1300. struct hostent *h1;
  1301. int i1, i2;
  1302. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1303. ], [
  1304. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1305. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1306. [Define this if gethostbyname_r takes 5 arguments])
  1307. AC_MSG_RESULT(5)
  1308. ], [
  1309. AC_TRY_COMPILE([
  1310. #include <netdb.h>
  1311. ], [
  1312. char *cp1;
  1313. struct hostent *h1;
  1314. struct hostent_data hd;
  1315. (void) gethostbyname_r(cp1,h1,&hd);
  1316. ], [
  1317. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1318. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1319. [Define this if gethostbyname_r takes 3 arguments])
  1320. AC_MSG_RESULT(3)
  1321. ], [
  1322. AC_MSG_RESULT(0)
  1323. ])
  1324. ])
  1325. ])
  1326. CFLAGS=$OLD_CFLAGS
  1327. ])
  1328. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1329. tor_cv_have_func_macro,
  1330. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1331. #include <stdio.h>
  1332. int main(int c, char **v) { puts(__func__); }])],
  1333. tor_cv_have_func_macro=yes,
  1334. tor_cv_have_func_macro=no))
  1335. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1336. tor_cv_have_FUNC_macro,
  1337. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1338. #include <stdio.h>
  1339. int main(int c, char **v) { puts(__FUNC__); }])],
  1340. tor_cv_have_FUNC_macro=yes,
  1341. tor_cv_have_FUNC_macro=no))
  1342. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1343. tor_cv_have_FUNCTION_macro,
  1344. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1345. #include <stdio.h>
  1346. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1347. tor_cv_have_FUNCTION_macro=yes,
  1348. tor_cv_have_FUNCTION_macro=no))
  1349. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1350. tor_cv_have_environ_declared,
  1351. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1352. #ifdef HAVE_UNISTD_H
  1353. #include <unistd.h>
  1354. #endif
  1355. #include <stdlib.h>
  1356. int main(int c, char **v) { char **t = environ; }])],
  1357. tor_cv_have_environ_declared=yes,
  1358. tor_cv_have_environ_declared=no))
  1359. if test "$tor_cv_have_func_macro" = "yes"; then
  1360. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1361. fi
  1362. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1363. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1364. fi
  1365. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1366. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1367. [Defined if the compiler supports __FUNCTION__])
  1368. fi
  1369. if test "$tor_cv_have_environ_declared" = "yes"; then
  1370. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1371. [Defined if we have extern char **environ already declared])
  1372. fi
  1373. # $prefix stores the value of the --prefix command line option, or
  1374. # NONE if the option wasn't set. In the case that it wasn't set, make
  1375. # it be the default, so that we can use it to expand directories now.
  1376. if test "x$prefix" = "xNONE"; then
  1377. prefix=$ac_default_prefix
  1378. fi
  1379. # and similarly for $exec_prefix
  1380. if test "x$exec_prefix" = "xNONE"; then
  1381. exec_prefix=$prefix
  1382. fi
  1383. if test "x$BUILDDIR" = "x"; then
  1384. BUILDDIR=`pwd`
  1385. fi
  1386. AC_SUBST(BUILDDIR)
  1387. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1388. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1389. if test "x$CONFDIR" = "x"; then
  1390. CONFDIR=`eval echo $sysconfdir/tor`
  1391. fi
  1392. AC_SUBST(CONFDIR)
  1393. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1394. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1395. BINDIR=`eval echo $bindir`
  1396. AC_SUBST(BINDIR)
  1397. LOCALSTATEDIR=`eval echo $localstatedir`
  1398. AC_SUBST(LOCALSTATEDIR)
  1399. if test "$bwin32" = "true"; then
  1400. # Test if the linker supports the --nxcompat and --dynamicbase options
  1401. # for Windows
  1402. save_LDFLAGS="$LDFLAGS"
  1403. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1404. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1405. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1406. [AC_MSG_RESULT([yes])]
  1407. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1408. [AC_MSG_RESULT([no])]
  1409. )
  1410. LDFLAGS="$save_LDFLAGS"
  1411. fi
  1412. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1413. # than autoconf's macros like.
  1414. if test "$GCC" = "yes"; then
  1415. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1416. # accident waiting to happen.
  1417. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1418. else
  1419. # Override optimization level for non-gcc compilers
  1420. CFLAGS="$CFLAGS -O"
  1421. enable_gcc_warnings=no
  1422. enable_gcc_warnings_advisory=no
  1423. fi
  1424. # Warnings implies advisory-warnings and -Werror.
  1425. if test "$enable_gcc_warnings" = "yes"; then
  1426. enable_gcc_warnings_advisory=yes
  1427. enable_fatal_warnings=yes
  1428. fi
  1429. # OS X Lion started deprecating the system openssl. Let's just disable
  1430. # all deprecation warnings on OS X. Also, to potentially make the binary
  1431. # a little smaller, let's enable dead_strip.
  1432. case "$host_os" in
  1433. darwin*)
  1434. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1435. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1436. esac
  1437. # Add some more warnings which we use in development but not in the
  1438. # released versions. (Some relevant gcc versions can't handle these.)
  1439. #
  1440. # Note that we have to do this near the end of the autoconf process, or
  1441. # else we may run into problems when these warnings hit on the testing C
  1442. # programs that autoconf wants to build.
  1443. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1444. case "$host" in
  1445. *-*-openbsd* | *-*-bitrig*)
  1446. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1447. # That's fine, except that the headers don't pass -Wredundant-decls.
  1448. # Therefore, let's disable -Wsystem-headers when we're building
  1449. # with maximal warnings on OpenBSD.
  1450. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1451. esac
  1452. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1453. # have it work better.
  1454. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1455. # This warning was added in gcc 4.3, but it appears to generate
  1456. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1457. #CFLAGS="$CFLAGS -Wlogical-op"
  1458. m4_foreach_w([warning_flag], [
  1459. -Waddress
  1460. -Waddress-of-array-temporary
  1461. -Waddress-of-temporary
  1462. -Wambiguous-macro
  1463. -Wanonymous-pack-parens
  1464. -Warc
  1465. -Warc-abi
  1466. -Warc-bridge-casts-disallowed-in-nonarc
  1467. -Warc-maybe-repeated-use-of-weak
  1468. -Warc-performSelector-leaks
  1469. -Warc-repeated-use-of-weak
  1470. -Warray-bounds
  1471. -Warray-bounds-pointer-arithmetic
  1472. -Wasm
  1473. -Wasm-operand-widths
  1474. -Watomic-properties
  1475. -Watomic-property-with-user-defined-accessor
  1476. -Wauto-import
  1477. -Wauto-storage-class
  1478. -Wauto-var-id
  1479. -Wavailability
  1480. -Wbackslash-newline-escape
  1481. -Wbad-array-new-length
  1482. -Wbind-to-temporary-copy
  1483. -Wbitfield-constant-conversion
  1484. -Wbool-conversion
  1485. -Wbool-conversions
  1486. -Wbuiltin-requires-header
  1487. -Wchar-align
  1488. -Wcompare-distinct-pointer-types
  1489. -Wcomplex-component-init
  1490. -Wconditional-type-mismatch
  1491. -Wconfig-macros
  1492. -Wconstant-conversion
  1493. -Wconstant-logical-operand
  1494. -Wconstexpr-not-const
  1495. -Wcustom-atomic-properties
  1496. -Wdangling-field
  1497. -Wdangling-initializer-list
  1498. -Wdate-time
  1499. -Wdelegating-ctor-cycles
  1500. -Wdeprecated-implementations
  1501. -Wdeprecated-register
  1502. -Wdirect-ivar-access
  1503. -Wdiscard-qual
  1504. -Wdistributed-object-modifiers
  1505. -Wdivision-by-zero
  1506. -Wdollar-in-identifier-extension
  1507. -Wdouble-promotion
  1508. -Wduplicate-decl-specifier
  1509. -Wduplicate-enum
  1510. -Wduplicate-method-arg
  1511. -Wduplicate-method-match
  1512. -Wduplicated-cond
  1513. -Wdynamic-class-memaccess
  1514. -Wembedded-directive
  1515. -Wempty-translation-unit
  1516. -Wenum-conversion
  1517. -Wexit-time-destructors
  1518. -Wexplicit-ownership-type
  1519. -Wextern-initializer
  1520. -Wextra
  1521. -Wextra-semi
  1522. -Wextra-tokens
  1523. -Wflexible-array-extensions
  1524. -Wfloat-conversion
  1525. -Wformat-non-iso
  1526. -Wfour-char-constants
  1527. -Wgcc-compat
  1528. -Wglobal-constructors
  1529. -Wgnu-array-member-paren-init
  1530. -Wgnu-designator
  1531. -Wgnu-static-float-init
  1532. -Wheader-guard
  1533. -Wheader-hygiene
  1534. -Widiomatic-parentheses
  1535. -Wignored-attributes
  1536. -Wimplicit-atomic-properties
  1537. -Wimplicit-conversion-floating-point-to-bool
  1538. -Wimplicit-exception-spec-mismatch
  1539. -Wimplicit-fallthrough
  1540. -Wimplicit-fallthrough-per-function
  1541. -Wimplicit-retain-self
  1542. -Wimport-preprocessor-directive-pedantic
  1543. -Wincompatible-library-redeclaration
  1544. -Wincompatible-pointer-types-discards-qualifiers
  1545. -Wincomplete-implementation
  1546. -Wincomplete-module
  1547. -Wincomplete-umbrella
  1548. -Winit-self
  1549. -Wint-conversions
  1550. -Wint-to-void-pointer-cast
  1551. -Winteger-overflow
  1552. -Winvalid-constexpr
  1553. -Winvalid-iboutlet
  1554. -Winvalid-noreturn
  1555. -Winvalid-pp-token
  1556. -Winvalid-source-encoding
  1557. -Winvalid-token-paste
  1558. -Wknr-promoted-parameter
  1559. -Wlanguage-extension-token
  1560. -Wlarge-by-value-copy
  1561. -Wliteral-conversion
  1562. -Wliteral-range
  1563. -Wlocal-type-template-args
  1564. -Wlogical-op
  1565. -Wloop-analysis
  1566. -Wmain-return-type
  1567. -Wmalformed-warning-check
  1568. -Wmethod-signatures
  1569. -Wmicrosoft
  1570. -Wmicrosoft-exists
  1571. -Wmismatched-parameter-types
  1572. -Wmismatched-return-types
  1573. -Wmissing-field-initializers
  1574. -Wmissing-format-attribute
  1575. -Wmissing-noreturn
  1576. -Wmissing-selector-name
  1577. -Wmissing-sysroot
  1578. -Wmissing-variable-declarations
  1579. -Wmodule-conflict
  1580. -Wnested-anon-types
  1581. -Wnewline-eof
  1582. -Wnon-literal-null-conversion
  1583. -Wnon-pod-varargs
  1584. -Wnonportable-cfstrings
  1585. -Wnormalized=id
  1586. -Wnull-arithmetic
  1587. -Wnull-character
  1588. -Wnull-conversion
  1589. -Wnull-dereference
  1590. -Wout-of-line-declaration
  1591. -Wover-aligned
  1592. -Woverlength-strings
  1593. -Woverride-init
  1594. -Woverriding-method-mismatch
  1595. -Wpointer-type-mismatch
  1596. -Wpredefined-identifier-outside-function
  1597. -Wprotocol-property-synthesis-ambiguity
  1598. -Wreadonly-iboutlet-property
  1599. -Wreadonly-setter-attrs
  1600. -Wreceiver-expr
  1601. -Wreceiver-forward-class
  1602. -Wreceiver-is-weak
  1603. -Wreinterpret-base-class
  1604. -Wrequires-super-attribute
  1605. -Wreserved-user-defined-literal
  1606. -Wreturn-stack-address
  1607. -Wsection
  1608. -Wselector-type-mismatch
  1609. -Wsentinel
  1610. -Wserialized-diagnostics
  1611. -Wshadow
  1612. -Wshift-count-negative
  1613. -Wshift-count-overflow
  1614. -Wshift-negative-value
  1615. -Wshift-overflow=2
  1616. -Wshift-sign-overflow
  1617. -Wshorten-64-to-32
  1618. -Wsizeof-array-argument
  1619. -Wsource-uses-openmp
  1620. -Wstatic-float-init
  1621. -Wstatic-in-inline
  1622. -Wstatic-local-in-inline
  1623. -Wstrict-overflow=2
  1624. -Wstring-compare
  1625. -Wstring-conversion
  1626. -Wstrlcpy-strlcat-size
  1627. -Wstrncat-size
  1628. -Wsuggest-attribute=format
  1629. -Wsuggest-attribute=noreturn
  1630. -Wsuper-class-method-mismatch
  1631. -Wswitch-bool
  1632. -Wsync-nand
  1633. -Wtautological-constant-out-of-range-compare
  1634. -Wtentative-definition-incomplete-type
  1635. -Wtrampolines
  1636. -Wtype-safety
  1637. -Wtypedef-redefinition
  1638. -Wtypename-missing
  1639. -Wundefined-inline
  1640. -Wundefined-internal
  1641. -Wundefined-reinterpret-cast
  1642. -Wunicode
  1643. -Wunicode-whitespace
  1644. -Wunknown-warning-option
  1645. -Wunnamed-type-template-args
  1646. -Wunneeded-member-function
  1647. -Wunsequenced
  1648. -Wunsupported-visibility
  1649. -Wunused-but-set-parameter
  1650. -Wunused-but-set-variable
  1651. -Wunused-command-line-argument
  1652. -Wunused-const-variable=2
  1653. -Wunused-exception-parameter
  1654. -Wunused-local-typedefs
  1655. -Wunused-member-function
  1656. -Wunused-sanitize-argument
  1657. -Wunused-volatile-lvalue
  1658. -Wuser-defined-literals
  1659. -Wvariadic-macros
  1660. -Wvector-conversion
  1661. -Wvector-conversions
  1662. -Wvexing-parse
  1663. -Wvisibility
  1664. -Wvla-extension
  1665. -Wzero-length-array
  1666. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1667. dnl These seem to require annotations that we don't currently use,
  1668. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1669. dnl -Wthread-safety
  1670. dnl -Wthread-safety-analysis
  1671. dnl -Wthread-safety-attributes
  1672. dnl -Wthread-safety-beta
  1673. dnl -Wthread-safety-precise
  1674. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1675. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1676. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1677. CFLAGS="$CFLAGS -Wwrite-strings"
  1678. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1679. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1680. CFLAGS="$CFLAGS -Wunused-parameter "
  1681. # These interfere with building main() { return 0; }, which autoconf
  1682. # likes to use as its default program.
  1683. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1684. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1685. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1686. fi
  1687. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1688. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1689. fi
  1690. if test "x$enable_fatal_warnings" = "xyes"; then
  1691. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1692. # default autoconf programs are full of errors.
  1693. CFLAGS="$CFLAGS -Werror"
  1694. fi
  1695. fi
  1696. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1697. case "$host_os" in
  1698. darwin*)
  1699. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1700. esac
  1701. fi
  1702. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1703. AC_CONFIG_FILES([
  1704. Doxyfile
  1705. Makefile
  1706. contrib/dist/suse/tor.sh
  1707. contrib/operator-tools/tor.logrotate
  1708. contrib/dist/tor.sh
  1709. contrib/dist/torctl
  1710. contrib/dist/tor.service
  1711. src/config/torrc.sample
  1712. src/config/torrc.minimal
  1713. scripts/maint/checkOptionDocs.pl
  1714. scripts/maint/updateVersions.pl
  1715. ])
  1716. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1717. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1718. for file in $regular_mans ; do
  1719. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1720. echo "==================================";
  1721. echo;
  1722. echo "Building Tor has failed since manpages cannot be built.";
  1723. echo;
  1724. echo "You need asciidoc installed to be able to build the manpages.";
  1725. echo "To build without manpages, use the --disable-asciidoc argument";
  1726. echo "when calling configure.";
  1727. echo;
  1728. echo "==================================";
  1729. exit 1;
  1730. fi
  1731. done
  1732. fi
  1733. AC_OUTPUT