configure.ac 54 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],[0.2.8.9-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_CANONICAL_HOST
  16. PKG_PROG_PKG_CONFIG
  17. if test -f "/etc/redhat-release"; then
  18. if test -f "/usr/kerberos/include"; then
  19. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  20. fi
  21. fi
  22. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  23. # the += operator on it in src/or/Makefile.am
  24. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  25. #XXXX020 We should make these enabled or not, before 0.2.0.x-final
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  28. AC_ARG_ENABLE(instrument-downloads,
  29. AS_HELP_STRING(--enable-instrument-downloads, [instrument downloads of directory resources etc.]))
  30. AC_ARG_ENABLE(static-openssl,
  31. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  32. AC_ARG_ENABLE(static-libevent,
  33. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  34. AC_ARG_ENABLE(static-zlib,
  35. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  36. AC_ARG_ENABLE(static-tor,
  37. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  38. AC_ARG_ENABLE(unittests,
  39. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  40. AC_ARG_ENABLE(coverage,
  41. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  42. AC_ARG_ENABLE(asserts-in-tests,
  43. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  44. AC_ARG_ENABLE(system-torrc,
  45. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  46. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  47. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  48. fi
  49. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  50. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  51. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  52. if test "$enable_static_tor" = "yes"; then
  53. enable_static_libevent="yes";
  54. enable_static_openssl="yes";
  55. enable_static_zlib="yes";
  56. CFLAGS="$CFLAGS -static"
  57. fi
  58. if test "$enable_system_torrc" = "no"; then
  59. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  60. [Defined if we're not going to look for a torrc in SYSCONF])
  61. fi
  62. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  63. if test "x$enable_instrument_downloads" = "xyes"; then
  64. AC_DEFINE(INSTRUMENT_DOWNLOADS, 1,
  65. [Defined if we want to keep track of how much of each kind of resource we download.])
  66. fi
  67. AC_ARG_ENABLE(transparent,
  68. AS_HELP_STRING(--disable-transparent, [disable transparent proxy support]),
  69. [case "${enableval}" in
  70. "yes") transparent=true ;;
  71. "no") transparent=false ;;
  72. *) AC_MSG_ERROR(bad value for --enable-transparent) ;;
  73. esac], [transparent=true])
  74. AC_ARG_ENABLE(asciidoc,
  75. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  76. [case "${enableval}" in
  77. "yes") asciidoc=true ;;
  78. "no") asciidoc=false ;;
  79. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  80. esac], [asciidoc=true])
  81. # systemd notify support
  82. AC_ARG_ENABLE(systemd,
  83. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  84. [case "${enableval}" in
  85. "yes") systemd=true ;;
  86. "no") systemd=false ;;
  87. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  88. esac], [systemd=auto])
  89. # systemd support
  90. if test "x$enable_systemd" = "xno"; then
  91. have_systemd=no;
  92. else
  93. PKG_CHECK_MODULES(SYSTEMD,
  94. [libsystemd-daemon],
  95. have_systemd=yes,
  96. have_systemd=no)
  97. if test "x$have_systemd" = "xno"; then
  98. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  99. PKG_CHECK_MODULES(SYSTEMD,
  100. [libsystemd],
  101. have_systemd=yes,
  102. have_systemd=no)
  103. fi
  104. fi
  105. if test "x$have_systemd" = "xyes"; then
  106. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  107. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  108. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  109. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  110. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  111. fi
  112. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  113. AC_SUBST(TOR_SYSTEMD_LIBS)
  114. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  115. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  116. fi
  117. case "$host" in
  118. *-*-solaris* )
  119. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  120. ;;
  121. esac
  122. AC_ARG_ENABLE(gcc-warnings,
  123. AS_HELP_STRING(--enable-gcc-warnings, [enable verbose warnings]))
  124. AC_ARG_ENABLE(gcc-warnings-advisory,
  125. AS_HELP_STRING(--enable-gcc-warnings-advisory, [enable verbose warnings, excluding -Werror]))
  126. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  127. AC_ARG_ENABLE(gcc-hardening,
  128. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  129. AC_ARG_ENABLE(expensive-hardening,
  130. AS_HELP_STRING(--enable-expensive-hardening, [enable more expensive compiler hardening; makes Tor slower]))
  131. dnl Linker hardening options
  132. dnl Currently these options are ELF specific - you can't use this with MacOSX
  133. AC_ARG_ENABLE(linker-hardening,
  134. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  135. AC_ARG_ENABLE(local-appdata,
  136. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  137. if test "$enable_local_appdata" = "yes"; then
  138. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  139. [Defined if we default to host local appdata paths on Windows])
  140. fi
  141. # Tor2web mode flag
  142. AC_ARG_ENABLE(tor2web-mode,
  143. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  144. [if test "x$enableval" = "xyes"; then
  145. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  146. fi])
  147. AC_ARG_ENABLE(bufferevents,
  148. AS_HELP_STRING(--enable-bufferevents, [use Libevent's buffered IO]))
  149. AC_ARG_ENABLE(tool-name-check,
  150. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  151. AC_ARG_ENABLE(seccomp,
  152. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  153. AC_ARG_ENABLE(libscrypt,
  154. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  155. dnl check for the correct "ar" when cross-compiling
  156. AN_MAKEVAR([AR], [AC_PROG_AR])
  157. AN_PROGRAM([ar], [AC_PROG_AR])
  158. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [ar])])
  159. AC_PROG_AR
  160. dnl Check whether the above macro has settled for a simply named tool even
  161. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  162. dnl because that will find any cc on the system, not only the cross-compiler,
  163. dnl and then verify that a binary built with this compiler runs on the
  164. dnl build system. It will then come to the false conclusion that we're not
  165. dnl cross-compiling.
  166. if test "x$enable_tool_name_check" != "xno"; then
  167. if test "x$ac_tool_warned" = "xyes"; then
  168. 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.)])
  169. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  170. 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.)])
  171. fi
  172. fi
  173. AC_PROG_CC
  174. AC_PROG_CPP
  175. AC_PROG_MAKE_SET
  176. AC_PROG_RANLIB
  177. AC_PATH_PROG([PERL], [perl])
  178. dnl autoconf 2.59 appears not to support AC_PROG_SED
  179. AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
  180. dnl check for asciidoc and a2x
  181. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  182. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  183. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  184. AM_CONDITIONAL(USE_FW_HELPER, test "x$natpmp" = "xtrue" || test "x$upnp" = "xtrue")
  185. AM_CONDITIONAL(NAT_PMP, test "x$natpmp" = "xtrue")
  186. AM_CONDITIONAL(MINIUPNPC, test "x$upnp" = "xtrue")
  187. AM_PROG_CC_C_O
  188. AC_PROG_CC_C99
  189. AC_ARG_VAR([PYTHON], [path to Python binary])
  190. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  191. if test "x$PYTHON" = "x"; then
  192. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  193. fi
  194. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  195. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  196. AC_C_FLEXIBLE_ARRAY_MEMBER
  197. ], [
  198. dnl Maybe we've got an old autoconf...
  199. AC_CACHE_CHECK([for flexible array members],
  200. tor_cv_c_flexarray,
  201. [AC_COMPILE_IFELSE(
  202. AC_LANG_PROGRAM([
  203. struct abc { int a; char b[]; };
  204. ], [
  205. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  206. def->b[0] = 33;
  207. ]),
  208. [tor_cv_c_flexarray=yes],
  209. [tor_cv_c_flexarray=no])])
  210. if test "$tor_cv_flexarray" = "yes"; then
  211. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  212. else
  213. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  214. fi
  215. ])
  216. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  217. tor_cv_c_c99_decl,
  218. [AC_COMPILE_IFELSE(
  219. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  220. [tor_cv_c_c99_decl=yes],
  221. [tor_cv_c_c99_decl=no] )])
  222. if test "$tor_cv_c_c99_decl" != "yes"; then
  223. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  224. fi
  225. AC_CACHE_CHECK([for working C99 designated initializers],
  226. tor_cv_c_c99_designated_init,
  227. [AC_COMPILE_IFELSE(
  228. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  229. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  230. [tor_cv_c_c99_designated_init=yes],
  231. [tor_cv_c_c99_designated_init=no] )])
  232. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  233. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  234. fi
  235. TORUSER=_tor
  236. AC_ARG_WITH(tor-user,
  237. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  238. [
  239. TORUSER=$withval
  240. ]
  241. )
  242. AC_SUBST(TORUSER)
  243. TORGROUP=_tor
  244. AC_ARG_WITH(tor-group,
  245. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  246. [
  247. TORGROUP=$withval
  248. ]
  249. )
  250. AC_SUBST(TORGROUP)
  251. dnl If _WIN32 is defined and non-zero, we are building for win32
  252. AC_MSG_CHECKING([for win32])
  253. AC_RUN_IFELSE([AC_LANG_SOURCE([
  254. int main(int c, char **v) {
  255. #ifdef _WIN32
  256. #if _WIN32
  257. return 0;
  258. #else
  259. return 1;
  260. #endif
  261. #else
  262. return 2;
  263. #endif
  264. }])],
  265. bwin32=true; AC_MSG_RESULT([yes]),
  266. bwin32=false; AC_MSG_RESULT([no]),
  267. bwin32=cross; AC_MSG_RESULT([cross])
  268. )
  269. if test "$bwin32" = "cross"; then
  270. AC_MSG_CHECKING([for win32 (cross)])
  271. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  272. #ifdef _WIN32
  273. int main(int c, char **v) {return 0;}
  274. #else
  275. #error
  276. int main(int c, char **v) {return x(y);}
  277. #endif
  278. ])],
  279. bwin32=true; AC_MSG_RESULT([yes]),
  280. bwin32=false; AC_MSG_RESULT([no]))
  281. fi
  282. AH_BOTTOM([
  283. #ifdef _WIN32
  284. /* Defined to access windows functions and definitions for >=WinXP */
  285. # ifndef WINVER
  286. # define WINVER 0x0501
  287. # endif
  288. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  289. # ifndef _WIN32_WINNT
  290. # define _WIN32_WINNT 0x0501
  291. # endif
  292. /* Defined to avoid including some windows headers as part of Windows.h */
  293. # ifndef WIN32_LEAN_AND_MEAN
  294. # define WIN32_LEAN_AND_MEAN 1
  295. # endif
  296. #endif
  297. ])
  298. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  299. dnl Enable C99 when compiling with MIPSpro
  300. AC_MSG_CHECKING([for MIPSpro compiler])
  301. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  302. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  303. #error
  304. return x(y);
  305. #endif
  306. ])],
  307. bmipspro=false; AC_MSG_RESULT(no),
  308. bmipspro=true; AC_MSG_RESULT(yes))
  309. if test "$bmipspro" = "true"; then
  310. CFLAGS="$CFLAGS -c99"
  311. fi
  312. AC_C_BIGENDIAN
  313. AC_SEARCH_LIBS(socket, [socket network])
  314. AC_SEARCH_LIBS(gethostbyname, [nsl])
  315. AC_SEARCH_LIBS(dlopen, [dl])
  316. AC_SEARCH_LIBS(inet_aton, [resolv])
  317. AC_SEARCH_LIBS(backtrace, [execinfo])
  318. saved_LIBS="$LIBS"
  319. AC_SEARCH_LIBS([clock_gettime], [rt])
  320. if test "$LIBS" != "$saved_LIBS"; then
  321. # Looks like we need -lrt for clock_gettime().
  322. have_rt=yes
  323. fi
  324. AC_SEARCH_LIBS(pthread_create, [pthread])
  325. AC_SEARCH_LIBS(pthread_detach, [pthread])
  326. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  327. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  328. AC_CHECK_FUNCS(
  329. _NSGetEnviron \
  330. RtlSecureZeroMemory \
  331. SecureZeroMemory \
  332. accept4 \
  333. backtrace \
  334. backtrace_symbols_fd \
  335. eventfd \
  336. explicit_bzero \
  337. timingsafe_memcmp \
  338. flock \
  339. ftime \
  340. getaddrinfo \
  341. getifaddrs \
  342. getpass \
  343. getrlimit \
  344. gettimeofday \
  345. gmtime_r \
  346. htonll \
  347. inet_aton \
  348. ioctl \
  349. issetugid \
  350. llround \
  351. localtime_r \
  352. lround \
  353. memmem \
  354. memset_s \
  355. pipe \
  356. pipe2 \
  357. prctl \
  358. readpassphrase \
  359. rint \
  360. sigaction \
  361. socketpair \
  362. statvfs \
  363. strlcat \
  364. strlcpy \
  365. strnlen \
  366. strptime \
  367. strtok_r \
  368. strtoull \
  369. sysconf \
  370. sysctl \
  371. uname \
  372. usleep \
  373. vasprintf \
  374. _vscprintf
  375. )
  376. # Apple messed up when they added two functions functions in Sierra: they
  377. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  378. # checks. So we should only probe for those functions if we are sure that we
  379. # are not targetting OSX 10.11 or earlier.
  380. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  381. AC_TRY_COMPILE([
  382. #ifdef __APPLE__
  383. # include <AvailabilityMacros.h>
  384. # ifndef MAC_OS_VERSION_10_12
  385. # define MAC_OS_VERSION_10_12 101200
  386. # endif
  387. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  388. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_VERSION_10_12
  389. # error "Running on Mac OSX 10.11 or earlier"
  390. # endif
  391. # endif
  392. #endif
  393. ], [],
  394. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  395. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  396. if test "$on_macos_pre_10_12" = "no"; then
  397. AC_CHECK_FUNCS(
  398. clock_gettime \
  399. getentropy \
  400. )
  401. fi
  402. if test "$bwin32" != "true"; then
  403. AC_CHECK_HEADERS(pthread.h)
  404. AC_CHECK_FUNCS(pthread_create)
  405. AC_CHECK_FUNCS(pthread_condattr_setclock)
  406. fi
  407. if test "$bwin32" = "true"; then
  408. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  409. #include <windows.h>
  410. #include <conio.h>
  411. #include <wchar.h>
  412. ])
  413. fi
  414. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  415. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  416. dnl ------------------------------------------------------
  417. dnl Where do you live, libevent? And how do we call you?
  418. if test "$bwin32" = "true"; then
  419. TOR_LIB_WS32=-lws2_32
  420. TOR_LIB_IPHLPAPI=-liphlpapi
  421. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  422. # think it's actually necessary.
  423. TOR_LIB_GDI=-lgdi32
  424. else
  425. TOR_LIB_WS32=
  426. TOR_LIB_GDI=
  427. fi
  428. AC_SUBST(TOR_LIB_WS32)
  429. AC_SUBST(TOR_LIB_GDI)
  430. AC_SUBST(TOR_LIB_IPHLPAPI)
  431. tor_libevent_pkg_redhat="libevent"
  432. tor_libevent_pkg_debian="libevent-dev"
  433. tor_libevent_devpkg_redhat="libevent-devel"
  434. tor_libevent_devpkg_debian="libevent-dev"
  435. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  436. dnl linking for static builds.
  437. STATIC_LIBEVENT_FLAGS=""
  438. if test "$enable_static_libevent" = "yes"; then
  439. if test "$have_rt" = "yes"; then
  440. STATIC_LIBEVENT_FLAGS=" -lrt "
  441. fi
  442. fi
  443. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  444. #ifdef _WIN32
  445. #include <winsock2.h>
  446. #endif
  447. #include <sys/time.h>
  448. #include <sys/types.h>
  449. #include <event.h>], [
  450. #ifdef _WIN32
  451. #include <winsock2.h>
  452. #endif
  453. void *event_init(void);],
  454. [
  455. #ifdef _WIN32
  456. {WSADATA d; WSAStartup(0x101,&d); }
  457. #endif
  458. event_init();
  459. ], [--with-libevent-dir], [/opt/libevent])
  460. dnl Now check for particular libevent functions.
  461. save_LIBS="$LIBS"
  462. save_LDFLAGS="$LDFLAGS"
  463. save_CPPFLAGS="$CPPFLAGS"
  464. LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
  465. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  466. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  467. AC_CHECK_FUNCS([event_get_version_number \
  468. evutil_secure_rng_set_urandom_device_file \
  469. evutil_secure_rng_init \
  470. ])
  471. AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
  472. [#include <event.h>
  473. ])
  474. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  475. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  476. AM_CONDITIONAL(USE_EXTERNAL_EVDNS,
  477. test "x$ac_cv_header_event2_dns_h" = "xyes")
  478. if test "$enable_static_libevent" = "yes"; then
  479. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  480. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  481. else
  482. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  483. fi
  484. else
  485. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  486. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  487. 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"))
  488. if test "$ac_cv_search_event_new" != "none required"; then
  489. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  490. fi
  491. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  492. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  493. fi
  494. else
  495. TOR_LIBEVENT_LIBS="-levent"
  496. fi
  497. fi
  498. LIBS="$save_LIBS"
  499. LDFLAGS="$save_LDFLAGS"
  500. CPPFLAGS="$save_CPPFLAGS"
  501. dnl This isn't the best test for Libevent 2.0.3-alpha. Once it's released,
  502. dnl we can do much better.
  503. if test "$enable_bufferevents" = "yes"; then
  504. if test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes"; then
  505. AC_MSG_ERROR([You've asked for bufferevent support, but you're using a version of Libevent without SSL support. This won't work. We need Libevent 2.0.8-rc or later, and you don't seem to even have Libevent 2.0.3-alpha.])
  506. else
  507. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  508. # Check for the right version. First see if version detection works.
  509. AC_MSG_CHECKING([whether we can detect the Libevent version])
  510. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  511. #include <event2/event.h>
  512. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 10
  513. #error
  514. int x = y(zz);
  515. #else
  516. int x = 1;
  517. #endif
  518. ])], [event_version_number_works=yes; AC_MSG_RESULT([yes]) ],
  519. [event_version_number_works=no; AC_MSG_RESULT([no])])
  520. if test "$event_version_number_works" != "yes"; then
  521. AC_MSG_WARN([Version detection on Libevent seems broken. Your Libevent installation is probably screwed up or very old.])
  522. else
  523. AC_MSG_CHECKING([whether Libevent is new enough for bufferevents])
  524. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  525. #include <event2/event.h>
  526. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000d00
  527. #error
  528. int x = y(zz);
  529. #else
  530. int x = 1;
  531. #endif
  532. ])], [ AC_MSG_RESULT([yes]) ],
  533. [ AC_MSG_RESULT([no])
  534. AC_MSG_ERROR([Libevent does not seem new enough to support bufferevents. We require 2.0.13-stable or later]) ] )
  535. fi
  536. fi
  537. fi
  538. LIBS="$save_LIBS"
  539. LDFLAGS="$save_LDFLAGS"
  540. CPPFLAGS="$save_CPPFLAGS"
  541. AM_CONDITIONAL(USE_BUFFEREVENTS, test "$enable_bufferevents" = "yes")
  542. if test "$enable_bufferevents" = "yes"; then
  543. AC_DEFINE(USE_BUFFEREVENTS, 1, [Defined if we're going to use Libevent's buffered IO API])
  544. if test "$enable_static_libevent" = "yes"; then
  545. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent_openssl.a $TOR_LIBEVENT_LIBS"
  546. else
  547. TOR_LIBEVENT_LIBS="-levent_openssl $TOR_LIBEVENT_LIBS"
  548. fi
  549. fi
  550. AC_SUBST(TOR_LIBEVENT_LIBS)
  551. dnl ------------------------------------------------------
  552. dnl Where do you live, libm?
  553. dnl On some platforms (Haiku/BeOS) the math library is
  554. dnl part of libroot. In which case don't link against lm
  555. TOR_LIB_MATH=""
  556. save_LIBS="$LIBS"
  557. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  558. if test "$ac_cv_search_pow" != "none required"; then
  559. TOR_LIB_MATH="$ac_cv_search_pow"
  560. fi
  561. LIBS="$save_LIBS"
  562. AC_SUBST(TOR_LIB_MATH)
  563. dnl ------------------------------------------------------
  564. dnl Where do you live, openssl? And how do we call you?
  565. tor_openssl_pkg_redhat="openssl"
  566. tor_openssl_pkg_debian="libssl-dev"
  567. tor_openssl_devpkg_redhat="openssl-devel"
  568. tor_openssl_devpkg_debian="libssl-dev"
  569. ALT_openssl_WITHVAL=""
  570. AC_ARG_WITH(ssl-dir,
  571. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  572. [
  573. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  574. ALT_openssl_WITHVAL="$withval"
  575. fi
  576. ])
  577. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  578. [#include <openssl/rand.h>],
  579. [void RAND_add(const void *buf, int num, double entropy);],
  580. [RAND_add((void*)0,0,0);], [],
  581. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  582. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  583. if test "$enable_static_openssl" = "yes"; then
  584. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  585. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  586. else
  587. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  588. fi
  589. else
  590. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  591. fi
  592. AC_SUBST(TOR_OPENSSL_LIBS)
  593. dnl Now check for particular openssl functions.
  594. save_LIBS="$LIBS"
  595. save_LDFLAGS="$LDFLAGS"
  596. save_CPPFLAGS="$CPPFLAGS"
  597. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  598. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  599. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  600. AC_TRY_COMPILE([
  601. #include <openssl/opensslv.h>
  602. #if OPENSSL_VERSION_NUMBER < 0x1000000fL
  603. #error "too old"
  604. #endif
  605. ], [],
  606. [ : ],
  607. [ AC_ERROR([OpenSSL is too old. We require 1.0.0 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  608. AC_TRY_COMPILE([
  609. #include <openssl/opensslv.h>
  610. #include <openssl/evp.h>
  611. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  612. #error "no ECC"
  613. #endif
  614. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  615. #error "curves unavailable"
  616. #endif
  617. ], [],
  618. [ : ],
  619. [ AC_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  620. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  621. [#include <openssl/ssl.h>
  622. ])
  623. AC_CHECK_FUNCS([ \
  624. SSL_SESSION_get_master_key \
  625. SSL_get_server_random \
  626. SSL_get_client_ciphers \
  627. SSL_get_client_random \
  628. SSL_CIPHER_find \
  629. TLS_method
  630. ])
  631. dnl Check if OpenSSL has scrypt implementation.
  632. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  633. LIBS="$save_LIBS"
  634. LDFLAGS="$save_LDFLAGS"
  635. CPPFLAGS="$save_CPPFLAGS"
  636. dnl ------------------------------------------------------
  637. dnl Where do you live, zlib? And how do we call you?
  638. tor_zlib_pkg_redhat="zlib"
  639. tor_zlib_pkg_debian="zlib1g"
  640. tor_zlib_devpkg_redhat="zlib-devel"
  641. tor_zlib_devpkg_debian="zlib1g-dev"
  642. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  643. [#include <zlib.h>],
  644. [const char * zlibVersion(void);],
  645. [zlibVersion();], [--with-zlib-dir],
  646. [/opt/zlib])
  647. if test "$enable_static_zlib" = "yes"; then
  648. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  649. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  650. using --enable-static-zlib")
  651. else
  652. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  653. fi
  654. else
  655. TOR_ZLIB_LIBS="-lz"
  656. fi
  657. AC_SUBST(TOR_ZLIB_LIBS)
  658. dnl ----------------------------------------------------------------------
  659. dnl Check if libcap is available for capabilities.
  660. tor_cap_pkg_debian="libcap2"
  661. tor_cap_pkg_redhat="libcap"
  662. tor_cap_devpkg_debian="libcap-dev"
  663. tor_cap_devpkg_redhat="libcap-devel"
  664. AC_CHECK_LIB([cap], [cap_init], [],
  665. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  666. )
  667. AC_CHECK_FUNCS(cap_set_proc)
  668. dnl ---------------------------------------------------------------------
  669. dnl Now that we know about our major libraries, we can check for compiler
  670. dnl and linker hardening options. We need to do this with the libraries known,
  671. dnl since sometimes the linker will like an option but not be willing to
  672. dnl use it with a build of a library.
  673. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  674. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  675. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  676. #if !defined(__clang__)
  677. #error
  678. #endif])], have_clang=yes, have_clang=no)
  679. if test "x$enable_gcc_hardening" != "xno"; then
  680. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  681. if test "x$have_clang" = "xyes"; then
  682. TOR_CHECK_CFLAGS(-Qunused-arguments)
  683. fi
  684. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  685. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  686. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  687. m4_ifdef([AS_VAR_IF],[
  688. AS_VAR_IF(can_compile, [yes],
  689. AS_VAR_IF(can_link, [yes],
  690. [],
  691. 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.)]))
  692. )])
  693. AS_VAR_POPDEF([can_link])
  694. AS_VAR_POPDEF([can_compile])
  695. TOR_CHECK_CFLAGS(-Wstack-protector)
  696. TOR_CHECK_CFLAGS(-fwrapv)
  697. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  698. if test "$bwin32" = "false"; then
  699. TOR_CHECK_CFLAGS(-fPIE)
  700. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  701. fi
  702. fi
  703. if test "x$enable_expensive_hardening" = "xyes"; then
  704. TOR_CHECK_CFLAGS([-fsanitize=address])
  705. TOR_CHECK_CFLAGS([-fsanitize=undefined])
  706. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  707. fi
  708. if test "x$enable_linker_hardening" != "xno"; then
  709. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  710. fi
  711. # For backtrace support
  712. TOR_CHECK_LDFLAGS(-rdynamic)
  713. dnl ------------------------------------------------------
  714. dnl Now see if we have a -fomit-frame-pointer compiler option.
  715. saved_CFLAGS="$CFLAGS"
  716. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  717. F_OMIT_FRAME_POINTER=''
  718. if test "$saved_CFLAGS" != "$CFLAGS"; then
  719. if test "x$enable_expensive_hardening" != "xyes"; then
  720. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  721. fi
  722. fi
  723. CFLAGS="$saved_CFLAGS"
  724. AC_SUBST(F_OMIT_FRAME_POINTER)
  725. dnl ------------------------------------------------------
  726. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  727. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  728. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  729. dnl code will work.
  730. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  731. dnl ============================================================
  732. dnl Check for libseccomp
  733. if test "x$enable_seccomp" != "xno"; then
  734. AC_CHECK_HEADERS([seccomp.h])
  735. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  736. fi
  737. dnl ============================================================
  738. dnl Check for libscrypt
  739. if test "x$enable_libscrypt" != "xno"; then
  740. AC_CHECK_HEADERS([libscrypt.h])
  741. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  742. AC_CHECK_FUNCS([libscrypt_scrypt])
  743. fi
  744. dnl ============================================================
  745. dnl We need an implementation of curve25519.
  746. dnl set these defaults.
  747. build_curve25519_donna=no
  748. build_curve25519_donna_c64=no
  749. use_curve25519_donna=no
  750. use_curve25519_nacl=no
  751. CURVE25519_LIBS=
  752. dnl The best choice is using curve25519-donna-c64, but that requires
  753. dnl that we
  754. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  755. tor_cv_can_use_curve25519_donna_c64,
  756. [AC_RUN_IFELSE(
  757. [AC_LANG_PROGRAM([dnl
  758. #include <stdint.h>
  759. typedef unsigned uint128_t __attribute__((mode(TI)));
  760. int func(uint64_t a, uint64_t b) {
  761. uint128_t c = ((uint128_t)a) * b;
  762. int ok = ((uint64_t)(c>>96)) == 522859 &&
  763. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  764. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  765. (((uint64_t)(c))&0xffffffffL) == 0;
  766. return ok;
  767. }
  768. ], [dnl
  769. int ok = func( ((uint64_t)2000000000) * 1000000000,
  770. ((uint64_t)1234567890) << 24);
  771. return !ok;
  772. ])],
  773. [tor_cv_can_use_curve25519_donna_c64=yes],
  774. [tor_cv_can_use_curve25519_donna_c64=no],
  775. [AC_LINK_IFELSE(
  776. [AC_LANG_PROGRAM([dnl
  777. #include <stdint.h>
  778. typedef unsigned uint128_t __attribute__((mode(TI)));
  779. int func(uint64_t a, uint64_t b) {
  780. uint128_t c = ((uint128_t)a) * b;
  781. int ok = ((uint64_t)(c>>96)) == 522859 &&
  782. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  783. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  784. (((uint64_t)(c))&0xffffffffL) == 0;
  785. return ok;
  786. }
  787. ], [dnl
  788. int ok = func( ((uint64_t)2000000000) * 1000000000,
  789. ((uint64_t)1234567890) << 24);
  790. return !ok;
  791. ])],
  792. [tor_cv_can_use_curve25519_donna_c64=cross],
  793. [tor_cv_can_use_curve25519_donna_c64=no])])])
  794. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  795. nacl/crypto_scalarmult_curve25519.h])
  796. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  797. tor_cv_can_use_curve25519_nacl,
  798. [tor_saved_LIBS="$LIBS"
  799. LIBS="$LIBS -lnacl"
  800. AC_LINK_IFELSE(
  801. [AC_LANG_PROGRAM([dnl
  802. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  803. #include <crypto_scalarmult_curve25519.h>
  804. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  805. #include <nacl/crypto_scalarmult_curve25519.h>
  806. #endif
  807. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  808. #error Hey, this is the reference implementation! That's not fast.
  809. #endif
  810. ], [
  811. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  812. ])], [tor_cv_can_use_curve25519_nacl=yes],
  813. [tor_cv_can_use_curve25519_nacl=no])
  814. LIBS="$tor_saved_LIBS" ])
  815. dnl Okay, now we need to figure out which one to actually use. Fall back
  816. dnl to curve25519-donna.c
  817. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  818. build_curve25519_donna_c64=yes
  819. use_curve25519_donna=yes
  820. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  821. use_curve25519_nacl=yes
  822. CURVE25519_LIBS=-lnacl
  823. else
  824. build_curve25519_donna=yes
  825. use_curve25519_donna=yes
  826. fi
  827. if test "x$use_curve25519_donna" = "xyes"; then
  828. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  829. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  830. fi
  831. if test "x$use_curve25519_nacl" = "xyes"; then
  832. AC_DEFINE(USE_CURVE25519_NACL, 1,
  833. [Defined if we should use a curve25519 from nacl])
  834. fi
  835. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  836. test "x$build_curve25519_donna" = "xyes")
  837. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  838. test "x$build_curve25519_donna_c64" = "xyes")
  839. AC_SUBST(CURVE25519_LIBS)
  840. dnl Make sure to enable support for large off_t if available.
  841. AC_SYS_LARGEFILE
  842. AC_CHECK_HEADERS(
  843. assert.h \
  844. errno.h \
  845. fcntl.h \
  846. signal.h \
  847. string.h \
  848. sys/capability.h \
  849. sys/fcntl.h \
  850. sys/stat.h \
  851. sys/time.h \
  852. sys/types.h \
  853. time.h \
  854. unistd.h
  855. , , AC_MSG_WARN(Some headers were not found, compilation may fail. If compilation succeeds, please send your orconfig.h to the developers so we can fix this warning.))
  856. dnl These headers are not essential
  857. AC_CHECK_HEADERS(
  858. arpa/inet.h \
  859. crt_externs.h \
  860. execinfo.h \
  861. grp.h \
  862. ifaddrs.h \
  863. inttypes.h \
  864. limits.h \
  865. linux/types.h \
  866. machine/limits.h \
  867. malloc.h \
  868. malloc/malloc.h \
  869. malloc_np.h \
  870. netdb.h \
  871. netinet/in.h \
  872. netinet/in6.h \
  873. pwd.h \
  874. readpassphrase.h \
  875. stdint.h \
  876. sys/eventfd.h \
  877. sys/file.h \
  878. sys/ioctl.h \
  879. sys/limits.h \
  880. sys/mman.h \
  881. sys/param.h \
  882. sys/prctl.h \
  883. sys/resource.h \
  884. sys/select.h \
  885. sys/socket.h \
  886. sys/statvfs.h \
  887. sys/syscall.h \
  888. sys/sysctl.h \
  889. sys/syslimits.h \
  890. sys/time.h \
  891. sys/types.h \
  892. sys/un.h \
  893. sys/utime.h \
  894. sys/wait.h \
  895. syslog.h \
  896. utime.h
  897. )
  898. AC_CHECK_HEADERS(sys/param.h)
  899. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  900. [#ifdef HAVE_SYS_TYPES_H
  901. #include <sys/types.h>
  902. #endif
  903. #ifdef HAVE_SYS_SOCKET_H
  904. #include <sys/socket.h>
  905. #endif])
  906. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  907. [#ifdef HAVE_SYS_TYPES_H
  908. #include <sys/types.h>
  909. #endif
  910. #ifdef HAVE_SYS_SOCKET_H
  911. #include <sys/socket.h>
  912. #endif
  913. #ifdef HAVE_NET_IF_H
  914. #include <net/if.h>
  915. #endif
  916. #ifdef HAVE_NETINET_IN_H
  917. #include <netinet/in.h>
  918. #endif])
  919. AC_CHECK_HEADERS(linux/if.h,[],[],
  920. [
  921. #ifdef HAVE_SYS_SOCKET_H
  922. #include <sys/socket.h>
  923. #endif
  924. ])
  925. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  926. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  927. [#ifdef HAVE_SYS_TYPES_H
  928. #include <sys/types.h>
  929. #endif
  930. #ifdef HAVE_SYS_SOCKET_H
  931. #include <sys/socket.h>
  932. #endif
  933. #ifdef HAVE_LIMITS_H
  934. #include <limits.h>
  935. #endif
  936. #ifdef HAVE_LINUX_TYPES_H
  937. #include <linux/types.h>
  938. #endif
  939. #ifdef HAVE_NETINET_IN6_H
  940. #include <netinet/in6.h>
  941. #endif
  942. #ifdef HAVE_NETINET_IN_H
  943. #include <netinet/in.h>
  944. #endif])
  945. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  946. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  947. [#ifdef HAVE_SYS_TYPES_H
  948. #include <sys/types.h>
  949. #endif
  950. #ifdef HAVE_SYS_SOCKET_H
  951. #include <sys/socket.h>
  952. #endif
  953. #ifdef HAVE_LIMITS_H
  954. #include <limits.h>
  955. #endif
  956. #ifdef HAVE_LINUX_TYPES_H
  957. #include <linux/types.h>
  958. #endif
  959. #ifdef HAVE_NETINET_IN6_H
  960. #include <netinet/in6.h>
  961. #endif
  962. #ifdef HAVE_NETINET_IN_H
  963. #include <netinet/in.h>
  964. #endif
  965. #ifdef HAVE_LINUX_IF_H
  966. #include <linux/if.h>
  967. #endif])
  968. if test "x$transparent" = "xtrue"; then
  969. transparent_ok=0
  970. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  971. transparent_ok=1
  972. fi
  973. if test "x$linux_netfilter_ipv4" = "x1"; then
  974. transparent_ok=1
  975. fi
  976. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  977. transparent_ok=1
  978. fi
  979. if test "x$transparent_ok" = "x1"; then
  980. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  981. case "$host" in
  982. *-*-openbsd* | *-*-bitrig*)
  983. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  984. esac
  985. else
  986. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  987. fi
  988. fi
  989. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  990. [#ifdef HAVE_SYS_TYPES_H
  991. #include <sys/types.h>
  992. #endif
  993. #ifdef HAVE_SYS_TIME_H
  994. #include <sys/time.h>
  995. #endif])
  996. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  997. dnl Watch out.
  998. AC_CHECK_SIZEOF(int8_t)
  999. AC_CHECK_SIZEOF(int16_t)
  1000. AC_CHECK_SIZEOF(int32_t)
  1001. AC_CHECK_SIZEOF(int64_t)
  1002. AC_CHECK_SIZEOF(uint8_t)
  1003. AC_CHECK_SIZEOF(uint16_t)
  1004. AC_CHECK_SIZEOF(uint32_t)
  1005. AC_CHECK_SIZEOF(uint64_t)
  1006. AC_CHECK_SIZEOF(intptr_t)
  1007. AC_CHECK_SIZEOF(uintptr_t)
  1008. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1009. AC_CHECK_SIZEOF(char)
  1010. AC_CHECK_SIZEOF(short)
  1011. AC_CHECK_SIZEOF(int)
  1012. AC_CHECK_SIZEOF(long)
  1013. AC_CHECK_SIZEOF(long long)
  1014. AC_CHECK_SIZEOF(__int64)
  1015. AC_CHECK_SIZEOF(void *)
  1016. AC_CHECK_SIZEOF(time_t)
  1017. AC_CHECK_SIZEOF(size_t)
  1018. AC_CHECK_SIZEOF(pid_t)
  1019. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1020. AC_PC_FROM_UCONTEXT([:])
  1021. dnl used to include sockaddr_storage, but everybody has that.
  1022. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1023. [#ifdef HAVE_SYS_TYPES_H
  1024. #include <sys/types.h>
  1025. #endif
  1026. #ifdef HAVE_NETINET_IN_H
  1027. #include <netinet/in.h>
  1028. #endif
  1029. #ifdef HAVE_NETINET_IN6_H
  1030. #include <netinet/in6.h>
  1031. #endif
  1032. #ifdef HAVE_SYS_SOCKET_H
  1033. #include <sys/socket.h>
  1034. #endif
  1035. #ifdef _WIN32
  1036. #define _WIN32_WINNT 0x0501
  1037. #define WIN32_LEAN_AND_MEAN
  1038. #include <winsock2.h>
  1039. #include <ws2tcpip.h>
  1040. #endif
  1041. ])
  1042. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1043. [#ifdef HAVE_SYS_TYPES_H
  1044. #include <sys/types.h>
  1045. #endif
  1046. #ifdef HAVE_NETINET_IN_H
  1047. #include <netinet/in.h>
  1048. #endif
  1049. #ifdef HAVE_NETINET_IN6_H
  1050. #include <netinet/in6.h>
  1051. #endif
  1052. #ifdef HAVE_SYS_SOCKET_H
  1053. #include <sys/socket.h>
  1054. #endif
  1055. #ifdef _WIN32
  1056. #define _WIN32_WINNT 0x0501
  1057. #define WIN32_LEAN_AND_MEAN
  1058. #include <winsock2.h>
  1059. #include <ws2tcpip.h>
  1060. #endif
  1061. ])
  1062. AC_CHECK_TYPES([rlim_t], , ,
  1063. [#ifdef HAVE_SYS_TYPES_H
  1064. #include <sys/types.h>
  1065. #endif
  1066. #ifdef HAVE_SYS_TIME_H
  1067. #include <sys/time.h>
  1068. #endif
  1069. #ifdef HAVE_SYS_RESOURCE_H
  1070. #include <sys/resource.h>
  1071. #endif
  1072. ])
  1073. AX_CHECK_SIGN([time_t],
  1074. [ : ],
  1075. [ : ], [
  1076. #ifdef HAVE_SYS_TYPES_H
  1077. #include <sys/types.h>
  1078. #endif
  1079. #ifdef HAVE_SYS_TIME_H
  1080. #include <sys/time.h>
  1081. #endif
  1082. #ifdef HAVE_TIME_H
  1083. #include <time.h>
  1084. #endif
  1085. ])
  1086. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1087. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1088. fi
  1089. AX_CHECK_SIGN([size_t],
  1090. [ tor_cv_size_t_signed=yes ],
  1091. [ tor_cv_size_t_signed=no ], [
  1092. #ifdef HAVE_SYS_TYPES_H
  1093. #include <sys/types.h>
  1094. #endif
  1095. ])
  1096. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1097. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1098. fi
  1099. AX_CHECK_SIGN([enum always],
  1100. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1101. [ : ], [
  1102. enum always { AAA, BBB, CCC };
  1103. ])
  1104. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1105. #ifdef HAVE_SYS_SOCKET_H
  1106. #include <sys/socket.h>
  1107. #endif
  1108. ])
  1109. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1110. AC_CHECK_SIZEOF(cell_t)
  1111. # Now make sure that NULL can be represented as zero bytes.
  1112. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1113. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1114. [[#include <stdlib.h>
  1115. #include <string.h>
  1116. #include <stdio.h>
  1117. #ifdef HAVE_STDDEF_H
  1118. #include <stddef.h>
  1119. #endif
  1120. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1121. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1122. [tor_cv_null_is_zero=yes],
  1123. [tor_cv_null_is_zero=no],
  1124. [tor_cv_null_is_zero=cross])])
  1125. if test "$tor_cv_null_is_zero" = "cross"; then
  1126. # Cross-compiling; let's hope that the target isn't raving mad.
  1127. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1128. fi
  1129. if test "$tor_cv_null_is_zero" != "no"; then
  1130. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1131. [Define to 1 iff memset(0) sets pointers to NULL])
  1132. fi
  1133. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1134. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1135. [[#include <stdlib.h>
  1136. #include <string.h>
  1137. #include <stdio.h>
  1138. #ifdef HAVE_STDDEF_H
  1139. #include <stddef.h>
  1140. #endif
  1141. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1142. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1143. [tor_cv_dbl0_is_zero=yes],
  1144. [tor_cv_dbl0_is_zero=no],
  1145. [tor_cv_dbl0_is_zero=cross])])
  1146. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1147. # Cross-compiling; let's hope that the target isn't raving mad.
  1148. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1149. fi
  1150. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1151. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1152. [Define to 1 iff memset(0) sets doubles to 0.0])
  1153. fi
  1154. # And what happens when we malloc zero?
  1155. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1156. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1157. [[#include <stdlib.h>
  1158. #include <string.h>
  1159. #include <stdio.h>
  1160. #ifdef HAVE_STDDEF_H
  1161. #include <stddef.h>
  1162. #endif
  1163. int main () { return malloc(0)?0:1; }]])],
  1164. [tor_cv_malloc_zero_works=yes],
  1165. [tor_cv_malloc_zero_works=no],
  1166. [tor_cv_malloc_zero_works=cross])])
  1167. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1168. # Cross-compiling; let's hope that the target isn't raving mad.
  1169. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1170. fi
  1171. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1172. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1173. [Define to 1 iff malloc(0) returns a pointer])
  1174. fi
  1175. # whether we seem to be in a 2s-complement world.
  1176. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1177. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1178. [[int main () { int problem = ((-99) != (~99)+1);
  1179. return problem ? 1 : 0; }]])],
  1180. [tor_cv_twos_complement=yes],
  1181. [tor_cv_twos_complement=no],
  1182. [tor_cv_twos_complement=cross])])
  1183. if test "$tor_cv_twos_complement" = "cross"; then
  1184. # Cross-compiling; let's hope that the target isn't raving mad.
  1185. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1186. fi
  1187. if test "$tor_cv_twos_complement" != "no"; then
  1188. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1189. [Define to 1 iff we represent negative integers with
  1190. two's complement])
  1191. fi
  1192. # What does shifting a negative value do?
  1193. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1194. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1195. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1196. [tor_cv_sign_extend=yes],
  1197. [tor_cv_sign_extend=no],
  1198. [tor_cv_sign_extend=cross])])
  1199. if test "$tor_cv_sign_extend" = "cross"; then
  1200. # Cross-compiling; let's hope that the target isn't raving mad.
  1201. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1202. fi
  1203. if test "$tor_cv_sign_extend" != "no"; then
  1204. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1205. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1206. fi
  1207. # Whether we should use the dmalloc memory allocation debugging library.
  1208. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1209. AC_ARG_WITH(dmalloc,
  1210. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1211. [if [[ "$withval" = "yes" ]]; then
  1212. dmalloc=1
  1213. AC_MSG_RESULT(yes)
  1214. else
  1215. dmalloc=1
  1216. AC_MSG_RESULT(no)
  1217. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1218. )
  1219. if [[ $dmalloc -eq 1 ]]; then
  1220. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1221. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1222. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1223. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1224. fi
  1225. AC_ARG_WITH(tcmalloc,
  1226. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1227. [ tcmalloc=yes ], [ tcmalloc=no ])
  1228. if test "x$tcmalloc" = "xyes"; then
  1229. LDFLAGS="-ltcmalloc $LDFLAGS"
  1230. fi
  1231. using_custom_malloc=no
  1232. if test "x$enable_openbsd_malloc" = "xyes"; then
  1233. using_custom_malloc=yes
  1234. fi
  1235. if test "x$tcmalloc" = "xyes"; then
  1236. using_custom_malloc=yes
  1237. fi
  1238. if test "$using_custom_malloc" = "no"; then
  1239. AC_CHECK_FUNCS(mallinfo)
  1240. fi
  1241. # By default, we're going to assume we don't have mlockall()
  1242. # bionic and other platforms have various broken mlockall subsystems.
  1243. # Some systems don't have a working mlockall, some aren't linkable,
  1244. # and some have it but don't declare it.
  1245. AC_CHECK_FUNCS(mlockall)
  1246. AC_CHECK_DECLS([mlockall], , , [
  1247. #ifdef HAVE_SYS_MMAN_H
  1248. #include <sys/mman.h>
  1249. #endif])
  1250. # Allow user to specify an alternate syslog facility
  1251. AC_ARG_WITH(syslog-facility,
  1252. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1253. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1254. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1255. AC_SUBST(LOGFACILITY)
  1256. # Check if we have getresuid and getresgid
  1257. AC_CHECK_FUNCS(getresuid getresgid)
  1258. # Check for gethostbyname_r in all its glorious incompatible versions.
  1259. # (This logic is based on that in Python's configure.in)
  1260. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1261. [Define this if you have any gethostbyname_r()])
  1262. AC_CHECK_FUNC(gethostbyname_r, [
  1263. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1264. OLD_CFLAGS=$CFLAGS
  1265. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1266. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1267. #include <netdb.h>
  1268. ], [[
  1269. char *cp1, *cp2;
  1270. struct hostent *h1, *h2;
  1271. int i1, i2;
  1272. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1273. ]])],[
  1274. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1275. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1276. [Define this if gethostbyname_r takes 6 arguments])
  1277. AC_MSG_RESULT(6)
  1278. ], [
  1279. AC_TRY_COMPILE([
  1280. #include <netdb.h>
  1281. ], [
  1282. char *cp1, *cp2;
  1283. struct hostent *h1;
  1284. int i1, i2;
  1285. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1286. ], [
  1287. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1288. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1289. [Define this if gethostbyname_r takes 5 arguments])
  1290. AC_MSG_RESULT(5)
  1291. ], [
  1292. AC_TRY_COMPILE([
  1293. #include <netdb.h>
  1294. ], [
  1295. char *cp1;
  1296. struct hostent *h1;
  1297. struct hostent_data hd;
  1298. (void) gethostbyname_r(cp1,h1,&hd);
  1299. ], [
  1300. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1301. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1302. [Define this if gethostbyname_r takes 3 arguments])
  1303. AC_MSG_RESULT(3)
  1304. ], [
  1305. AC_MSG_RESULT(0)
  1306. ])
  1307. ])
  1308. ])
  1309. CFLAGS=$OLD_CFLAGS
  1310. ])
  1311. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1312. tor_cv_have_func_macro,
  1313. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1314. #include <stdio.h>
  1315. int main(int c, char **v) { puts(__func__); }])],
  1316. tor_cv_have_func_macro=yes,
  1317. tor_cv_have_func_macro=no))
  1318. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1319. tor_cv_have_FUNC_macro,
  1320. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1321. #include <stdio.h>
  1322. int main(int c, char **v) { puts(__FUNC__); }])],
  1323. tor_cv_have_FUNC_macro=yes,
  1324. tor_cv_have_FUNC_macro=no))
  1325. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1326. tor_cv_have_FUNCTION_macro,
  1327. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1328. #include <stdio.h>
  1329. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1330. tor_cv_have_FUNCTION_macro=yes,
  1331. tor_cv_have_FUNCTION_macro=no))
  1332. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1333. tor_cv_have_environ_declared,
  1334. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1335. /* We define _GNU_SOURCE here because it is also defined in compat.c.
  1336. * Without it environ doesn't get declared. */
  1337. #define _GNU_SOURCE
  1338. #ifdef HAVE_UNISTD_H
  1339. #include <unistd.h>
  1340. #endif
  1341. #include <stdlib.h>
  1342. int main(int c, char **v) { char **t = environ; }])],
  1343. tor_cv_have_environ_declared=yes,
  1344. tor_cv_have_environ_declared=no))
  1345. if test "$tor_cv_have_func_macro" = "yes"; then
  1346. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1347. fi
  1348. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1349. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1350. fi
  1351. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1352. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1353. [Defined if the compiler supports __FUNCTION__])
  1354. fi
  1355. if test "$tor_cv_have_environ_declared" = "yes"; then
  1356. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1357. [Defined if we have extern char **environ already declared])
  1358. fi
  1359. # $prefix stores the value of the --prefix command line option, or
  1360. # NONE if the option wasn't set. In the case that it wasn't set, make
  1361. # it be the default, so that we can use it to expand directories now.
  1362. if test "x$prefix" = "xNONE"; then
  1363. prefix=$ac_default_prefix
  1364. fi
  1365. # and similarly for $exec_prefix
  1366. if test "x$exec_prefix" = "xNONE"; then
  1367. exec_prefix=$prefix
  1368. fi
  1369. if test "x$BUILDDIR" = "x"; then
  1370. BUILDDIR=`pwd`
  1371. fi
  1372. AC_SUBST(BUILDDIR)
  1373. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1374. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1375. if test "x$CONFDIR" = "x"; then
  1376. CONFDIR=`eval echo $sysconfdir/tor`
  1377. fi
  1378. AC_SUBST(CONFDIR)
  1379. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1380. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1381. BINDIR=`eval echo $bindir`
  1382. AC_SUBST(BINDIR)
  1383. LOCALSTATEDIR=`eval echo $localstatedir`
  1384. AC_SUBST(LOCALSTATEDIR)
  1385. if test "$bwin32" = "true"; then
  1386. # Test if the linker supports the --nxcompat and --dynamicbase options
  1387. # for Windows
  1388. save_LDFLAGS="$LDFLAGS"
  1389. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1390. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1391. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1392. [AC_MSG_RESULT([yes])]
  1393. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1394. [AC_MSG_RESULT([no])]
  1395. )
  1396. LDFLAGS="$save_LDFLAGS"
  1397. fi
  1398. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1399. # than autoconf's macros like.
  1400. if test "$GCC" = "yes"; then
  1401. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1402. # accident waiting to happen.
  1403. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1404. else
  1405. # Override optimization level for non-gcc compilers
  1406. CFLAGS="$CFLAGS -O"
  1407. enable_gcc_warnings=no
  1408. enable_gcc_warnings_advisory=no
  1409. fi
  1410. # OS X Lion started deprecating the system openssl. Let's just disable
  1411. # all deprecation warnings on OS X. Also, to potentially make the binary
  1412. # a little smaller, let's enable dead_strip.
  1413. case "$host_os" in
  1414. darwin*)
  1415. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1416. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1417. esac
  1418. # Add some more warnings which we use in development but not in the
  1419. # released versions. (Some relevant gcc versions can't handle these.)
  1420. if test "x$enable_gcc_warnings" = "xyes" ||
  1421. test "x$enable_gcc_warnings_advisory" = "xyes"; then
  1422. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1423. #if !defined(__GNUC__) || (__GNUC__ < 4)
  1424. #error
  1425. #endif])], have_gcc4=yes, have_gcc4=no)
  1426. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1427. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)
  1428. #error
  1429. #endif])], have_gcc42=yes, have_gcc42=no)
  1430. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1431. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
  1432. #error
  1433. #endif])], have_gcc43=yes, have_gcc43=no)
  1434. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1435. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)
  1436. #error
  1437. #endif])], have_gcc46=yes, have_gcc46=no)
  1438. save_CFLAGS="$CFLAGS"
  1439. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1440. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], have_shorten64_flag=yes,
  1441. have_shorten64_flag=no)
  1442. CFLAGS="$save_CFLAGS"
  1443. case "$host" in
  1444. *-*-openbsd* | *-*-bitrig*)
  1445. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1446. # That's fine, except that the headers don't pass -Wredundant-decls.
  1447. # Therefore, let's disable -Wsystem-headers when we're building
  1448. # with maximal warnings on OpenBSD.
  1449. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1450. esac
  1451. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1452. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1453. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1454. CFLAGS="$CFLAGS -Wwrite-strings -Wmissing-declarations -Wredundant-decls"
  1455. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1456. if test "x$enable_gcc_warnings" = "xyes"; then
  1457. CFLAGS="$CFLAGS -Werror"
  1458. fi
  1459. # Disabled, so we can use mallinfo(): -Waggregate-return
  1460. if test "x$have_gcc4" = "xyes"; then
  1461. # These warnings break gcc 3.3.5 and work on gcc 4.0.2
  1462. CFLAGS="$CFLAGS -Winit-self -Wmissing-field-initializers -Wold-style-definition"
  1463. fi
  1464. if test "x$have_gcc42" = "xyes"; then
  1465. # These warnings break gcc 4.0.2 and work on gcc 4.2
  1466. # XXXX020 See if any of these work with earlier versions.
  1467. CFLAGS="$CFLAGS -Waddress -Wmissing-noreturn -Wstrict-overflow=1"
  1468. # We used to use -Wstrict-overflow=5, but that breaks us heavily under 4.3.
  1469. fi
  1470. if test "x$have_gcc42" = "xyes" && test "x$have_clang" = "xno"; then
  1471. # These warnings break gcc 4.0.2 and clang, but work on gcc 4.2
  1472. CFLAGS="$CFLAGS -Wnormalized=id -Woverride-init"
  1473. fi
  1474. if test "x$have_gcc43" = "xyes"; then
  1475. # These warnings break gcc 4.2 and work on gcc 4.3
  1476. # XXXX020 See if any of these work with earlier versions.
  1477. CFLAGS="$CFLAGS -Wextra -Warray-bounds"
  1478. fi
  1479. if test "x$have_gcc46" = "xyes"; then
  1480. # This warning was added in gcc 4.3, but it appears to generate
  1481. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1482. CFLAGS="$CFLAGS -Wlogical-op"
  1483. fi
  1484. if test "x$have_shorten64_flag" = "xyes"; then
  1485. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1486. fi
  1487. ##This will break the world on some 64-bit architectures
  1488. # CFLAGS="$CFLAGS -Winline"
  1489. fi
  1490. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1491. case "$host_os" in
  1492. darwin*)
  1493. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-profiling.])
  1494. esac
  1495. fi
  1496. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1497. AC_CONFIG_FILES([
  1498. Doxyfile
  1499. Makefile
  1500. contrib/dist/suse/tor.sh
  1501. contrib/operator-tools/tor.logrotate
  1502. contrib/dist/tor.sh
  1503. contrib/dist/torctl
  1504. contrib/dist/tor.service
  1505. src/config/torrc.sample
  1506. src/config/torrc.minimal
  1507. scripts/maint/checkOptionDocs.pl
  1508. scripts/maint/updateVersions.pl
  1509. ])
  1510. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1511. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1512. for file in $regular_mans ; do
  1513. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1514. echo "==================================";
  1515. echo;
  1516. echo "Building Tor has failed since manpages cannot be built.";
  1517. echo;
  1518. echo "You need asciidoc installed to be able to build the manpages.";
  1519. echo "To build without manpages, use the --disable-asciidoc argument";
  1520. echo "when calling configure.";
  1521. echo;
  1522. echo "==================================";
  1523. exit 1;
  1524. fi
  1525. done
  1526. fi
  1527. AC_OUTPUT