configure.ac 53 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],[0.2.8.1-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_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(UNITTESTS_ENABLED, test x$enable_unittests != xno)
  52. AM_CONDITIONAL(COVERAGE_ENABLED, test x$enable_coverage = xyes)
  53. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  54. if test "$enable_static_tor" = "yes"; then
  55. enable_static_libevent="yes";
  56. enable_static_openssl="yes";
  57. enable_static_zlib="yes";
  58. CFLAGS="$CFLAGS -static"
  59. fi
  60. if test "$enable_system_torrc" = "no"; then
  61. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  62. [Defined if we're not going to look for a torrc in SYSCONF])
  63. fi
  64. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  65. if test "x$enable_instrument_downloads" = "xyes"; then
  66. AC_DEFINE(INSTRUMENT_DOWNLOADS, 1,
  67. [Defined if we want to keep track of how much of each kind of resource we download.])
  68. fi
  69. AC_ARG_ENABLE(transparent,
  70. AS_HELP_STRING(--disable-transparent, [disable transparent proxy support]),
  71. [case "${enableval}" in
  72. "yes") transparent=true ;;
  73. "no") transparent=false ;;
  74. *) AC_MSG_ERROR(bad value for --enable-transparent) ;;
  75. esac], [transparent=true])
  76. AC_ARG_ENABLE(asciidoc,
  77. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  78. [case "${enableval}" in
  79. "yes") asciidoc=true ;;
  80. "no") asciidoc=false ;;
  81. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  82. esac], [asciidoc=true])
  83. # systemd notify support
  84. AC_ARG_ENABLE(systemd,
  85. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  86. [case "${enableval}" in
  87. "yes") systemd=true ;;
  88. "no") systemd=false ;;
  89. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  90. esac], [systemd=auto])
  91. # systemd support
  92. if test "x$enable_systemd" = "xno"; then
  93. have_systemd=no;
  94. else
  95. PKG_CHECK_MODULES(SYSTEMD,
  96. [libsystemd-daemon],
  97. have_systemd=yes,
  98. have_systemd=no)
  99. if test "x$have_systemd" = "xno"; then
  100. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  101. PKG_CHECK_MODULES(SYSTEMD,
  102. [libsystemd],
  103. have_systemd=yes,
  104. have_systemd=no)
  105. fi
  106. fi
  107. if test "x$have_systemd" = "xyes"; then
  108. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  109. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  110. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  111. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  112. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  113. fi
  114. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  115. AC_SUBST(TOR_SYSTEMD_LIBS)
  116. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  117. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  118. fi
  119. case "$host" in
  120. *-*-solaris* )
  121. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  122. ;;
  123. esac
  124. AC_ARG_ENABLE(gcc-warnings,
  125. AS_HELP_STRING(--enable-gcc-warnings, [enable verbose warnings]))
  126. AC_ARG_ENABLE(gcc-warnings-advisory,
  127. AS_HELP_STRING(--enable-gcc-warnings-advisory, [enable verbose warnings, excluding -Werror]))
  128. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  129. AC_ARG_ENABLE(gcc-hardening,
  130. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  131. AC_ARG_ENABLE(expensive-hardening,
  132. AS_HELP_STRING(--enable-expensive-hardening, [enable more expensive compiler hardening; makes Tor slower]))
  133. dnl Linker hardening options
  134. dnl Currently these options are ELF specific - you can't use this with MacOSX
  135. AC_ARG_ENABLE(linker-hardening,
  136. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  137. AC_ARG_ENABLE(local-appdata,
  138. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  139. if test "$enable_local_appdata" = "yes"; then
  140. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  141. [Defined if we default to host local appdata paths on Windows])
  142. fi
  143. # Tor2web mode flag
  144. AC_ARG_ENABLE(tor2web-mode,
  145. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  146. [if test "x$enableval" = "xyes"; then
  147. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  148. fi])
  149. AC_ARG_ENABLE(bufferevents,
  150. AS_HELP_STRING(--enable-bufferevents, [use Libevent's buffered IO]))
  151. AC_ARG_ENABLE(tool-name-check,
  152. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  153. AC_ARG_ENABLE(seccomp,
  154. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  155. AC_ARG_ENABLE(libscrypt,
  156. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  157. dnl check for the correct "ar" when cross-compiling
  158. AN_MAKEVAR([AR], [AC_PROG_AR])
  159. AN_PROGRAM([ar], [AC_PROG_AR])
  160. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [ar])])
  161. AC_PROG_AR
  162. dnl Check whether the above macro has settled for a simply named tool even
  163. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  164. dnl because that will find any cc on the system, not only the cross-compiler,
  165. dnl and then verify that a binary built with this compiler runs on the
  166. dnl build system. It will then come to the false conclusion that we're not
  167. dnl cross-compiling.
  168. if test "x$enable_tool_name_check" != "xno"; then
  169. if test "x$ac_tool_warned" = "xyes"; then
  170. 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.)])
  171. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  172. 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.)])
  173. fi
  174. fi
  175. AC_PROG_CC
  176. AC_PROG_CPP
  177. AC_PROG_MAKE_SET
  178. AC_PROG_RANLIB
  179. AC_PATH_PROG([PERL], [perl])
  180. dnl autoconf 2.59 appears not to support AC_PROG_SED
  181. AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
  182. dnl check for asciidoc and a2x
  183. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  184. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  185. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  186. AM_CONDITIONAL(USE_FW_HELPER, test "x$natpmp" = "xtrue" || test "x$upnp" = "xtrue")
  187. AM_CONDITIONAL(NAT_PMP, test "x$natpmp" = "xtrue")
  188. AM_CONDITIONAL(MINIUPNPC, test "x$upnp" = "xtrue")
  189. AM_PROG_CC_C_O
  190. AC_PROG_CC_C99
  191. AC_ARG_VAR([PYTHON], [path to Python binary])
  192. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  193. if test "x$PYTHON" = "x"; then
  194. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  195. fi
  196. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  197. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  198. AC_C_FLEXIBLE_ARRAY_MEMBER
  199. ], [
  200. dnl Maybe we've got an old autoconf...
  201. AC_CACHE_CHECK([for flexible array members],
  202. tor_cv_c_flexarray,
  203. [AC_COMPILE_IFELSE(
  204. AC_LANG_PROGRAM([
  205. struct abc { int a; char b[]; };
  206. ], [
  207. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  208. def->b[0] = 33;
  209. ]),
  210. [tor_cv_c_flexarray=yes],
  211. [tor_cv_c_flexarray=no])])
  212. if test "$tor_cv_flexarray" = "yes"; then
  213. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  214. else
  215. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  216. fi
  217. ])
  218. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  219. tor_cv_c_c99_decl,
  220. [AC_COMPILE_IFELSE(
  221. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  222. [tor_cv_c_c99_decl=yes],
  223. [tor_cv_c_c99_decl=no] )])
  224. if test "$tor_cv_c_c99_decl" != "yes"; then
  225. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  226. fi
  227. AC_CACHE_CHECK([for working C99 designated initializers],
  228. tor_cv_c_c99_designated_init,
  229. [AC_COMPILE_IFELSE(
  230. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  231. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  232. [tor_cv_c_c99_designated_init=yes],
  233. [tor_cv_c_c99_designated_init=no] )])
  234. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  235. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  236. fi
  237. TORUSER=_tor
  238. AC_ARG_WITH(tor-user,
  239. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  240. [
  241. TORUSER=$withval
  242. ]
  243. )
  244. AC_SUBST(TORUSER)
  245. TORGROUP=_tor
  246. AC_ARG_WITH(tor-group,
  247. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  248. [
  249. TORGROUP=$withval
  250. ]
  251. )
  252. AC_SUBST(TORGROUP)
  253. dnl If _WIN32 is defined and non-zero, we are building for win32
  254. AC_MSG_CHECKING([for win32])
  255. AC_RUN_IFELSE([AC_LANG_SOURCE([
  256. int main(int c, char **v) {
  257. #ifdef _WIN32
  258. #if _WIN32
  259. return 0;
  260. #else
  261. return 1;
  262. #endif
  263. #else
  264. return 2;
  265. #endif
  266. }])],
  267. bwin32=true; AC_MSG_RESULT([yes]),
  268. bwin32=false; AC_MSG_RESULT([no]),
  269. bwin32=cross; AC_MSG_RESULT([cross])
  270. )
  271. if test "$bwin32" = "cross"; then
  272. AC_MSG_CHECKING([for win32 (cross)])
  273. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  274. #ifdef _WIN32
  275. int main(int c, char **v) {return 0;}
  276. #else
  277. #error
  278. int main(int c, char **v) {return x(y);}
  279. #endif
  280. ])],
  281. bwin32=true; AC_MSG_RESULT([yes]),
  282. bwin32=false; AC_MSG_RESULT([no]))
  283. fi
  284. AH_BOTTOM([
  285. #ifdef _WIN32
  286. /* Defined to access windows functions and definitions for >=WinXP */
  287. # ifndef WINVER
  288. # define WINVER 0x0501
  289. # endif
  290. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  291. # ifndef _WIN32_WINNT
  292. # define _WIN32_WINNT 0x0501
  293. # endif
  294. /* Defined to avoid including some windows headers as part of Windows.h */
  295. # ifndef WIN32_LEAN_AND_MEAN
  296. # define WIN32_LEAN_AND_MEAN 1
  297. # endif
  298. #endif
  299. ])
  300. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  301. dnl Enable C99 when compiling with MIPSpro
  302. AC_MSG_CHECKING([for MIPSpro compiler])
  303. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  304. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  305. #error
  306. return x(y);
  307. #endif
  308. ])],
  309. bmipspro=false; AC_MSG_RESULT(no),
  310. bmipspro=true; AC_MSG_RESULT(yes))
  311. if test "$bmipspro" = "true"; then
  312. CFLAGS="$CFLAGS -c99"
  313. fi
  314. AC_C_BIGENDIAN
  315. AC_SEARCH_LIBS(socket, [socket network])
  316. AC_SEARCH_LIBS(gethostbyname, [nsl])
  317. AC_SEARCH_LIBS(dlopen, [dl])
  318. AC_SEARCH_LIBS(inet_aton, [resolv])
  319. AC_SEARCH_LIBS(backtrace, [execinfo])
  320. saved_LIBS="$LIBS"
  321. AC_SEARCH_LIBS([clock_gettime], [rt])
  322. if test "$LIBS" != "$saved_LIBS"; then
  323. # Looks like we need -lrt for clock_gettime().
  324. have_rt=yes
  325. fi
  326. AC_SEARCH_LIBS(pthread_create, [pthread])
  327. AC_SEARCH_LIBS(pthread_detach, [pthread])
  328. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  329. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  330. AC_CHECK_FUNCS(
  331. _NSGetEnviron \
  332. RtlSecureZeroMemory \
  333. SecureZeroMemory \
  334. accept4 \
  335. backtrace \
  336. backtrace_symbols_fd \
  337. clock_gettime \
  338. eventfd \
  339. explicit_bzero \
  340. timingsafe_memcmp \
  341. flock \
  342. ftime \
  343. getaddrinfo \
  344. getentropy \
  345. getifaddrs \
  346. getpass \
  347. getrlimit \
  348. gettimeofday \
  349. gmtime_r \
  350. htonll \
  351. inet_aton \
  352. ioctl \
  353. issetugid \
  354. llround \
  355. localtime_r \
  356. lround \
  357. memmem \
  358. memset_s \
  359. pipe \
  360. pipe2 \
  361. prctl \
  362. readpassphrase \
  363. rint \
  364. sigaction \
  365. socketpair \
  366. statvfs \
  367. strlcat \
  368. strlcpy \
  369. strnlen \
  370. strptime \
  371. strtok_r \
  372. strtoull \
  373. sysconf \
  374. sysctl \
  375. uname \
  376. usleep \
  377. vasprintf \
  378. _vscprintf
  379. )
  380. if test "$bwin32" != "true"; then
  381. AC_CHECK_HEADERS(pthread.h)
  382. AC_CHECK_FUNCS(pthread_create)
  383. AC_CHECK_FUNCS(pthread_condattr_setclock)
  384. fi
  385. if test "$bwin32" = "true"; then
  386. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  387. #include <windows.h>
  388. #include <conio.h>
  389. #include <wchar.h>
  390. ])
  391. fi
  392. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  393. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  394. dnl ------------------------------------------------------
  395. dnl Where do you live, libevent? And how do we call you?
  396. if test "$bwin32" = "true"; then
  397. TOR_LIB_WS32=-lws2_32
  398. TOR_LIB_IPHLPAPI=-liphlpapi
  399. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  400. # think it's actually necessary.
  401. TOR_LIB_GDI=-lgdi32
  402. else
  403. TOR_LIB_WS32=
  404. TOR_LIB_GDI=
  405. fi
  406. AC_SUBST(TOR_LIB_WS32)
  407. AC_SUBST(TOR_LIB_GDI)
  408. AC_SUBST(TOR_LIB_IPHLPAPI)
  409. tor_libevent_pkg_redhat="libevent"
  410. tor_libevent_pkg_debian="libevent-dev"
  411. tor_libevent_devpkg_redhat="libevent-devel"
  412. tor_libevent_devpkg_debian="libevent-dev"
  413. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  414. dnl linking for static builds.
  415. STATIC_LIBEVENT_FLAGS=""
  416. if test "$enable_static_libevent" = "yes"; then
  417. if test "$have_rt" = "yes"; then
  418. STATIC_LIBEVENT_FLAGS=" -lrt "
  419. fi
  420. fi
  421. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  422. #ifdef _WIN32
  423. #include <winsock2.h>
  424. #endif
  425. #include <sys/time.h>
  426. #include <sys/types.h>
  427. #include <event.h>], [
  428. #ifdef _WIN32
  429. #include <winsock2.h>
  430. #endif
  431. void *event_init(void);],
  432. [
  433. #ifdef _WIN32
  434. {WSADATA d; WSAStartup(0x101,&d); }
  435. #endif
  436. event_init();
  437. ], [--with-libevent-dir], [/opt/libevent])
  438. dnl Now check for particular libevent functions.
  439. save_LIBS="$LIBS"
  440. save_LDFLAGS="$LDFLAGS"
  441. save_CPPFLAGS="$CPPFLAGS"
  442. LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
  443. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  444. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  445. AC_CHECK_FUNCS([event_get_version_number \
  446. evutil_secure_rng_set_urandom_device_file \
  447. evutil_secure_rng_init \
  448. ])
  449. AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
  450. [#include <event.h>
  451. ])
  452. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  453. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  454. AM_CONDITIONAL(USE_EXTERNAL_EVDNS,
  455. test "x$ac_cv_header_event2_dns_h" = "xyes")
  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 $TOR_LIBEVENT_LIBS"
  471. fi
  472. else
  473. TOR_LIBEVENT_LIBS="-levent"
  474. fi
  475. fi
  476. LIBS="$save_LIBS"
  477. LDFLAGS="$save_LDFLAGS"
  478. CPPFLAGS="$save_CPPFLAGS"
  479. dnl This isn't the best test for Libevent 2.0.3-alpha. Once it's released,
  480. dnl we can do much better.
  481. if test "$enable_bufferevents" = "yes"; then
  482. if test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes"; then
  483. 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.])
  484. else
  485. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  486. # Check for the right version. First see if version detection works.
  487. AC_MSG_CHECKING([whether we can detect the Libevent version])
  488. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  489. #include <event2/event.h>
  490. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 10
  491. #error
  492. int x = y(zz);
  493. #else
  494. int x = 1;
  495. #endif
  496. ])], [event_version_number_works=yes; AC_MSG_RESULT([yes]) ],
  497. [event_version_number_works=no; AC_MSG_RESULT([no])])
  498. if test "$event_version_number_works" != "yes"; then
  499. AC_MSG_WARN([Version detection on Libevent seems broken. Your Libevent installation is probably screwed up or very old.])
  500. else
  501. AC_MSG_CHECKING([whether Libevent is new enough for bufferevents])
  502. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  503. #include <event2/event.h>
  504. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000d00
  505. #error
  506. int x = y(zz);
  507. #else
  508. int x = 1;
  509. #endif
  510. ])], [ AC_MSG_RESULT([yes]) ],
  511. [ AC_MSG_RESULT([no])
  512. AC_MSG_ERROR([Libevent does not seem new enough to support bufferevents. We require 2.0.13-stable or later]) ] )
  513. fi
  514. fi
  515. fi
  516. LIBS="$save_LIBS"
  517. LDFLAGS="$save_LDFLAGS"
  518. CPPFLAGS="$save_CPPFLAGS"
  519. AM_CONDITIONAL(USE_BUFFEREVENTS, test "$enable_bufferevents" = "yes")
  520. if test "$enable_bufferevents" = "yes"; then
  521. AC_DEFINE(USE_BUFFEREVENTS, 1, [Defined if we're going to use Libevent's buffered IO API])
  522. if test "$enable_static_libevent" = "yes"; then
  523. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent_openssl.a $TOR_LIBEVENT_LIBS"
  524. else
  525. TOR_LIBEVENT_LIBS="-levent_openssl $TOR_LIBEVENT_LIBS"
  526. fi
  527. fi
  528. AC_SUBST(TOR_LIBEVENT_LIBS)
  529. dnl ------------------------------------------------------
  530. dnl Where do you live, libm?
  531. dnl On some platforms (Haiku/BeOS) the math library is
  532. dnl part of libroot. In which case don't link against lm
  533. TOR_LIB_MATH=""
  534. save_LIBS="$LIBS"
  535. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  536. if test "$ac_cv_search_pow" != "none required"; then
  537. TOR_LIB_MATH="$ac_cv_search_pow"
  538. fi
  539. LIBS="$save_LIBS"
  540. AC_SUBST(TOR_LIB_MATH)
  541. dnl ------------------------------------------------------
  542. dnl Where do you live, openssl? And how do we call you?
  543. tor_openssl_pkg_redhat="openssl"
  544. tor_openssl_pkg_debian="libssl-dev"
  545. tor_openssl_devpkg_redhat="openssl-devel"
  546. tor_openssl_devpkg_debian="libssl-dev"
  547. ALT_openssl_WITHVAL=""
  548. AC_ARG_WITH(ssl-dir,
  549. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  550. [
  551. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  552. ALT_openssl_WITHVAL="$withval"
  553. fi
  554. ])
  555. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  556. [#include <openssl/rand.h>],
  557. [void RAND_add(const void *buf, int num, double entropy);],
  558. [RAND_add((void*)0,0,0);], [],
  559. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  560. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  561. if test "$enable_static_openssl" = "yes"; then
  562. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  563. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  564. else
  565. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  566. fi
  567. else
  568. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  569. fi
  570. AC_SUBST(TOR_OPENSSL_LIBS)
  571. dnl Now check for particular openssl functions.
  572. save_LIBS="$LIBS"
  573. save_LDFLAGS="$LDFLAGS"
  574. save_CPPFLAGS="$CPPFLAGS"
  575. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  576. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  577. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  578. AC_TRY_COMPILE([
  579. #include <openssl/opensslv.h>
  580. #if OPENSSL_VERSION_NUMBER < 0x1000000fL
  581. #error "too old"
  582. #endif
  583. ], [],
  584. [ : ],
  585. [ AC_ERROR([OpenSSL is too old. We require 1.0.0 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  586. AC_TRY_COMPILE([
  587. #include <openssl/opensslv.h>
  588. #include <openssl/evp.h>
  589. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  590. #error "no ECC"
  591. #endif
  592. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  593. #error "curves unavailable"
  594. #endif
  595. ], [],
  596. [ : ],
  597. [ AC_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  598. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  599. [#include <openssl/ssl.h>
  600. ])
  601. AC_CHECK_FUNCS([ \
  602. SSL_SESSION_get_master_key \
  603. SSL_get_server_random \
  604. SSL_get_client_ciphers \
  605. SSL_get_client_random \
  606. SSL_CIPHER_find \
  607. TLS_method
  608. ])
  609. dnl Check if OpenSSL has scrypt implementation.
  610. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  611. LIBS="$save_LIBS"
  612. LDFLAGS="$save_LDFLAGS"
  613. CPPFLAGS="$save_CPPFLAGS"
  614. dnl ------------------------------------------------------
  615. dnl Where do you live, zlib? And how do we call you?
  616. tor_zlib_pkg_redhat="zlib"
  617. tor_zlib_pkg_debian="zlib1g"
  618. tor_zlib_devpkg_redhat="zlib-devel"
  619. tor_zlib_devpkg_debian="zlib1g-dev"
  620. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  621. [#include <zlib.h>],
  622. [const char * zlibVersion(void);],
  623. [zlibVersion();], [--with-zlib-dir],
  624. [/opt/zlib])
  625. if test "$enable_static_zlib" = "yes"; then
  626. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  627. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  628. using --enable-static-zlib")
  629. else
  630. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  631. fi
  632. else
  633. TOR_ZLIB_LIBS="-lz"
  634. fi
  635. AC_SUBST(TOR_ZLIB_LIBS)
  636. dnl ----------------------------------------------------------------------
  637. dnl Check if libcap is available for capabilities.
  638. tor_cap_pkg_debian="libcap2"
  639. tor_cap_pkg_redhat="libcap"
  640. tor_cap_devpkg_debian="libcap-dev"
  641. tor_cap_devpkg_redhat="libcap-devel"
  642. AC_CHECK_LIB([cap], [cap_init], [],
  643. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  644. )
  645. AC_CHECK_FUNCS(cap_set_proc)
  646. dnl ---------------------------------------------------------------------
  647. dnl Now that we know about our major libraries, we can check for compiler
  648. dnl and linker hardening options. We need to do this with the libraries known,
  649. dnl since sometimes the linker will like an option but not be willing to
  650. dnl use it with a build of a library.
  651. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  652. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  653. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  654. #if !defined(__clang__)
  655. #error
  656. #endif])], have_clang=yes, have_clang=no)
  657. if test "x$enable_gcc_hardening" != "xno"; then
  658. CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
  659. if test "x$have_clang" = "xyes"; then
  660. TOR_CHECK_CFLAGS(-Qunused-arguments)
  661. fi
  662. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  663. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  664. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  665. m4_ifdef([AS_VAR_IF],[
  666. AS_VAR_IF(can_compile, [yes],
  667. AS_VAR_IF(can_link, [yes],
  668. [],
  669. 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.)]))
  670. )])
  671. AS_VAR_POPDEF([can_link])
  672. AS_VAR_POPDEF([can_compile])
  673. TOR_CHECK_CFLAGS(-Wstack-protector)
  674. TOR_CHECK_CFLAGS(-fwrapv)
  675. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  676. if test "$bwin32" = "false"; then
  677. TOR_CHECK_CFLAGS(-fPIE)
  678. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  679. fi
  680. fi
  681. if test "x$enable_expensive_hardening" = "xyes"; then
  682. TOR_CHECK_CFLAGS([-fsanitize=address])
  683. TOR_CHECK_CFLAGS([-fsanitize=undefined])
  684. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  685. fi
  686. if test "x$enable_linker_hardening" != "xno"; then
  687. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  688. fi
  689. # For backtrace support
  690. TOR_CHECK_LDFLAGS(-rdynamic)
  691. dnl ------------------------------------------------------
  692. dnl Now see if we have a -fomit-frame-pointer compiler option.
  693. saved_CFLAGS="$CFLAGS"
  694. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  695. F_OMIT_FRAME_POINTER=''
  696. if test "$saved_CFLAGS" != "$CFLAGS"; then
  697. if test "x$enable_expensive_hardening" != "xyes"; then
  698. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  699. fi
  700. fi
  701. CFLAGS="$saved_CFLAGS"
  702. AC_SUBST(F_OMIT_FRAME_POINTER)
  703. dnl ------------------------------------------------------
  704. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  705. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  706. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  707. dnl code will work.
  708. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  709. dnl ============================================================
  710. dnl Check for libseccomp
  711. if test "x$enable_seccomp" != "xno"; then
  712. AC_CHECK_HEADERS([seccomp.h])
  713. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  714. fi
  715. dnl ============================================================
  716. dnl Check for libscrypt
  717. if test "x$enable_libscrypt" != "xno"; then
  718. AC_CHECK_HEADERS([libscrypt.h])
  719. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  720. fi
  721. dnl ============================================================
  722. dnl We need an implementation of curve25519.
  723. dnl set these defaults.
  724. build_curve25519_donna=no
  725. build_curve25519_donna_c64=no
  726. use_curve25519_donna=no
  727. use_curve25519_nacl=no
  728. CURVE25519_LIBS=
  729. dnl The best choice is using curve25519-donna-c64, but that requires
  730. dnl that we
  731. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  732. tor_cv_can_use_curve25519_donna_c64,
  733. [AC_RUN_IFELSE(
  734. [AC_LANG_PROGRAM([dnl
  735. #include <stdint.h>
  736. typedef unsigned uint128_t __attribute__((mode(TI)));
  737. int func(uint64_t a, uint64_t b) {
  738. uint128_t c = ((uint128_t)a) * b;
  739. int ok = ((uint64_t)(c>>96)) == 522859 &&
  740. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  741. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  742. (((uint64_t)(c))&0xffffffffL) == 0;
  743. return ok;
  744. }
  745. ], [dnl
  746. int ok = func( ((uint64_t)2000000000) * 1000000000,
  747. ((uint64_t)1234567890) << 24);
  748. return !ok;
  749. ])],
  750. [tor_cv_can_use_curve25519_donna_c64=yes],
  751. [tor_cv_can_use_curve25519_donna_c64=no],
  752. [AC_LINK_IFELSE(
  753. [AC_LANG_PROGRAM([dnl
  754. #include <stdint.h>
  755. typedef unsigned uint128_t __attribute__((mode(TI)));
  756. int func(uint64_t a, uint64_t b) {
  757. uint128_t c = ((uint128_t)a) * b;
  758. int ok = ((uint64_t)(c>>96)) == 522859 &&
  759. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  760. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  761. (((uint64_t)(c))&0xffffffffL) == 0;
  762. return ok;
  763. }
  764. ], [dnl
  765. int ok = func( ((uint64_t)2000000000) * 1000000000,
  766. ((uint64_t)1234567890) << 24);
  767. return !ok;
  768. ])],
  769. [tor_cv_can_use_curve25519_donna_c64=cross],
  770. [tor_cv_can_use_curve25519_donna_c64=no])])])
  771. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  772. nacl/crypto_scalarmult_curve25519.h])
  773. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  774. tor_cv_can_use_curve25519_nacl,
  775. [tor_saved_LIBS="$LIBS"
  776. LIBS="$LIBS -lnacl"
  777. AC_LINK_IFELSE(
  778. [AC_LANG_PROGRAM([dnl
  779. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  780. #include <crypto_scalarmult_curve25519.h>
  781. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  782. #include <nacl/crypto_scalarmult_curve25519.h>
  783. #endif
  784. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  785. #error Hey, this is the reference implementation! That's not fast.
  786. #endif
  787. ], [
  788. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  789. ])], [tor_cv_can_use_curve25519_nacl=yes],
  790. [tor_cv_can_use_curve25519_nacl=no])
  791. LIBS="$tor_saved_LIBS" ])
  792. dnl Okay, now we need to figure out which one to actually use. Fall back
  793. dnl to curve25519-donna.c
  794. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  795. build_curve25519_donna_c64=yes
  796. use_curve25519_donna=yes
  797. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  798. use_curve25519_nacl=yes
  799. CURVE25519_LIBS=-lnacl
  800. else
  801. build_curve25519_donna=yes
  802. use_curve25519_donna=yes
  803. fi
  804. if test "x$use_curve25519_donna" = "xyes"; then
  805. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  806. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  807. fi
  808. if test "x$use_curve25519_nacl" = "xyes"; then
  809. AC_DEFINE(USE_CURVE25519_NACL, 1,
  810. [Defined if we should use a curve25519 from nacl])
  811. fi
  812. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  813. test "x$build_curve25519_donna" = "xyes")
  814. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  815. test "x$build_curve25519_donna_c64" = "xyes")
  816. AC_SUBST(CURVE25519_LIBS)
  817. dnl Make sure to enable support for large off_t if available.
  818. AC_SYS_LARGEFILE
  819. AC_CHECK_HEADERS(
  820. assert.h \
  821. errno.h \
  822. fcntl.h \
  823. signal.h \
  824. string.h \
  825. sys/capability.h \
  826. sys/fcntl.h \
  827. sys/stat.h \
  828. sys/time.h \
  829. sys/types.h \
  830. time.h \
  831. unistd.h
  832. , , 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.))
  833. dnl These headers are not essential
  834. AC_CHECK_HEADERS(
  835. arpa/inet.h \
  836. crt_externs.h \
  837. execinfo.h \
  838. grp.h \
  839. ifaddrs.h \
  840. inttypes.h \
  841. limits.h \
  842. linux/types.h \
  843. machine/limits.h \
  844. malloc.h \
  845. malloc/malloc.h \
  846. malloc_np.h \
  847. netdb.h \
  848. netinet/in.h \
  849. netinet/in6.h \
  850. pwd.h \
  851. readpassphrase.h \
  852. stdint.h \
  853. sys/eventfd.h \
  854. sys/file.h \
  855. sys/ioctl.h \
  856. sys/limits.h \
  857. sys/mman.h \
  858. sys/param.h \
  859. sys/prctl.h \
  860. sys/resource.h \
  861. sys/select.h \
  862. sys/socket.h \
  863. sys/statvfs.h \
  864. sys/syscall.h \
  865. sys/sysctl.h \
  866. sys/syslimits.h \
  867. sys/time.h \
  868. sys/types.h \
  869. sys/un.h \
  870. sys/utime.h \
  871. sys/wait.h \
  872. syslog.h \
  873. utime.h
  874. )
  875. AC_CHECK_HEADERS(sys/param.h)
  876. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  877. [#ifdef HAVE_SYS_TYPES_H
  878. #include <sys/types.h>
  879. #endif
  880. #ifdef HAVE_SYS_SOCKET_H
  881. #include <sys/socket.h>
  882. #endif])
  883. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  884. [#ifdef HAVE_SYS_TYPES_H
  885. #include <sys/types.h>
  886. #endif
  887. #ifdef HAVE_SYS_SOCKET_H
  888. #include <sys/socket.h>
  889. #endif
  890. #ifdef HAVE_NET_IF_H
  891. #include <net/if.h>
  892. #endif
  893. #ifdef HAVE_NETINET_IN_H
  894. #include <netinet/in.h>
  895. #endif])
  896. AC_CHECK_HEADERS(linux/if.h,[],[],
  897. [
  898. #ifdef HAVE_SYS_SOCKET_H
  899. #include <sys/socket.h>
  900. #endif
  901. ])
  902. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  903. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  904. [#ifdef HAVE_SYS_TYPES_H
  905. #include <sys/types.h>
  906. #endif
  907. #ifdef HAVE_SYS_SOCKET_H
  908. #include <sys/socket.h>
  909. #endif
  910. #ifdef HAVE_LIMITS_H
  911. #include <limits.h>
  912. #endif
  913. #ifdef HAVE_LINUX_TYPES_H
  914. #include <linux/types.h>
  915. #endif
  916. #ifdef HAVE_NETINET_IN6_H
  917. #include <netinet/in6.h>
  918. #endif
  919. #ifdef HAVE_NETINET_IN_H
  920. #include <netinet/in.h>
  921. #endif])
  922. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  923. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  924. [#ifdef HAVE_SYS_TYPES_H
  925. #include <sys/types.h>
  926. #endif
  927. #ifdef HAVE_SYS_SOCKET_H
  928. #include <sys/socket.h>
  929. #endif
  930. #ifdef HAVE_LIMITS_H
  931. #include <limits.h>
  932. #endif
  933. #ifdef HAVE_LINUX_TYPES_H
  934. #include <linux/types.h>
  935. #endif
  936. #ifdef HAVE_NETINET_IN6_H
  937. #include <netinet/in6.h>
  938. #endif
  939. #ifdef HAVE_NETINET_IN_H
  940. #include <netinet/in.h>
  941. #endif
  942. #ifdef HAVE_LINUX_IF_H
  943. #include <linux/if.h>
  944. #endif])
  945. if test "x$transparent" = "xtrue"; then
  946. transparent_ok=0
  947. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  948. transparent_ok=1
  949. fi
  950. if test "x$linux_netfilter_ipv4" = "x1"; then
  951. transparent_ok=1
  952. fi
  953. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  954. transparent_ok=1
  955. fi
  956. if test "x$transparent_ok" = "x1"; then
  957. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  958. case "$host" in
  959. *-*-openbsd* | *-*-bitrig*)
  960. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  961. esac
  962. else
  963. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  964. fi
  965. fi
  966. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  967. [#ifdef HAVE_SYS_TYPES_H
  968. #include <sys/types.h>
  969. #endif
  970. #ifdef HAVE_SYS_TIME_H
  971. #include <sys/time.h>
  972. #endif])
  973. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  974. dnl Watch out.
  975. AC_CHECK_SIZEOF(int8_t)
  976. AC_CHECK_SIZEOF(int16_t)
  977. AC_CHECK_SIZEOF(int32_t)
  978. AC_CHECK_SIZEOF(int64_t)
  979. AC_CHECK_SIZEOF(uint8_t)
  980. AC_CHECK_SIZEOF(uint16_t)
  981. AC_CHECK_SIZEOF(uint32_t)
  982. AC_CHECK_SIZEOF(uint64_t)
  983. AC_CHECK_SIZEOF(intptr_t)
  984. AC_CHECK_SIZEOF(uintptr_t)
  985. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  986. AC_CHECK_SIZEOF(char)
  987. AC_CHECK_SIZEOF(short)
  988. AC_CHECK_SIZEOF(int)
  989. AC_CHECK_SIZEOF(long)
  990. AC_CHECK_SIZEOF(long long)
  991. AC_CHECK_SIZEOF(__int64)
  992. AC_CHECK_SIZEOF(void *)
  993. AC_CHECK_SIZEOF(time_t)
  994. AC_CHECK_SIZEOF(size_t)
  995. AC_CHECK_SIZEOF(pid_t)
  996. AC_CHECK_TYPES([uint, u_char, ssize_t])
  997. AC_PC_FROM_UCONTEXT([:])
  998. dnl used to include sockaddr_storage, but everybody has that.
  999. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1000. [#ifdef HAVE_SYS_TYPES_H
  1001. #include <sys/types.h>
  1002. #endif
  1003. #ifdef HAVE_NETINET_IN_H
  1004. #include <netinet/in.h>
  1005. #endif
  1006. #ifdef HAVE_NETINET_IN6_H
  1007. #include <netinet/in6.h>
  1008. #endif
  1009. #ifdef HAVE_SYS_SOCKET_H
  1010. #include <sys/socket.h>
  1011. #endif
  1012. #ifdef _WIN32
  1013. #define _WIN32_WINNT 0x0501
  1014. #define WIN32_LEAN_AND_MEAN
  1015. #include <winsock2.h>
  1016. #include <ws2tcpip.h>
  1017. #endif
  1018. ])
  1019. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1020. [#ifdef HAVE_SYS_TYPES_H
  1021. #include <sys/types.h>
  1022. #endif
  1023. #ifdef HAVE_NETINET_IN_H
  1024. #include <netinet/in.h>
  1025. #endif
  1026. #ifdef HAVE_NETINET_IN6_H
  1027. #include <netinet/in6.h>
  1028. #endif
  1029. #ifdef HAVE_SYS_SOCKET_H
  1030. #include <sys/socket.h>
  1031. #endif
  1032. #ifdef _WIN32
  1033. #define _WIN32_WINNT 0x0501
  1034. #define WIN32_LEAN_AND_MEAN
  1035. #include <winsock2.h>
  1036. #include <ws2tcpip.h>
  1037. #endif
  1038. ])
  1039. AC_CHECK_TYPES([rlim_t], , ,
  1040. [#ifdef HAVE_SYS_TYPES_H
  1041. #include <sys/types.h>
  1042. #endif
  1043. #ifdef HAVE_SYS_TIME_H
  1044. #include <sys/time.h>
  1045. #endif
  1046. #ifdef HAVE_SYS_RESOURCE_H
  1047. #include <sys/resource.h>
  1048. #endif
  1049. ])
  1050. AX_CHECK_SIGN([time_t],
  1051. [ : ],
  1052. [ : ], [
  1053. #ifdef HAVE_SYS_TYPES_H
  1054. #include <sys/types.h>
  1055. #endif
  1056. #ifdef HAVE_SYS_TIME_H
  1057. #include <sys/time.h>
  1058. #endif
  1059. #ifdef HAVE_TIME_H
  1060. #include <time.h>
  1061. #endif
  1062. ])
  1063. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1064. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1065. fi
  1066. AX_CHECK_SIGN([size_t],
  1067. [ tor_cv_size_t_signed=yes ],
  1068. [ tor_cv_size_t_signed=no ], [
  1069. #ifdef HAVE_SYS_TYPES_H
  1070. #include <sys/types.h>
  1071. #endif
  1072. ])
  1073. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1074. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1075. fi
  1076. AX_CHECK_SIGN([enum always],
  1077. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1078. [ : ], [
  1079. enum always { AAA, BBB, CCC };
  1080. ])
  1081. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1082. #ifdef HAVE_SYS_SOCKET_H
  1083. #include <sys/socket.h>
  1084. #endif
  1085. ])
  1086. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1087. AC_CHECK_SIZEOF(cell_t)
  1088. # Now make sure that NULL can be represented as zero bytes.
  1089. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1090. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1091. [[#include <stdlib.h>
  1092. #include <string.h>
  1093. #include <stdio.h>
  1094. #ifdef HAVE_STDDEF_H
  1095. #include <stddef.h>
  1096. #endif
  1097. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1098. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1099. [tor_cv_null_is_zero=yes],
  1100. [tor_cv_null_is_zero=no],
  1101. [tor_cv_null_is_zero=cross])])
  1102. if test "$tor_cv_null_is_zero" = "cross"; then
  1103. # Cross-compiling; let's hope that the target isn't raving mad.
  1104. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1105. fi
  1106. if test "$tor_cv_null_is_zero" != "no"; then
  1107. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1108. [Define to 1 iff memset(0) sets pointers to NULL])
  1109. fi
  1110. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1111. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1112. [[#include <stdlib.h>
  1113. #include <string.h>
  1114. #include <stdio.h>
  1115. #ifdef HAVE_STDDEF_H
  1116. #include <stddef.h>
  1117. #endif
  1118. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1119. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1120. [tor_cv_dbl0_is_zero=yes],
  1121. [tor_cv_dbl0_is_zero=no],
  1122. [tor_cv_dbl0_is_zero=cross])])
  1123. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1124. # Cross-compiling; let's hope that the target isn't raving mad.
  1125. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1126. fi
  1127. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1128. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1129. [Define to 1 iff memset(0) sets doubles to 0.0])
  1130. fi
  1131. # And what happens when we malloc zero?
  1132. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1133. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1134. [[#include <stdlib.h>
  1135. #include <string.h>
  1136. #include <stdio.h>
  1137. #ifdef HAVE_STDDEF_H
  1138. #include <stddef.h>
  1139. #endif
  1140. int main () { return malloc(0)?0:1; }]])],
  1141. [tor_cv_malloc_zero_works=yes],
  1142. [tor_cv_malloc_zero_works=no],
  1143. [tor_cv_malloc_zero_works=cross])])
  1144. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1145. # Cross-compiling; let's hope that the target isn't raving mad.
  1146. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1147. fi
  1148. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1149. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1150. [Define to 1 iff malloc(0) returns a pointer])
  1151. fi
  1152. # whether we seem to be in a 2s-complement world.
  1153. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1154. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1155. [[int main () { int problem = ((-99) != (~99)+1);
  1156. return problem ? 1 : 0; }]])],
  1157. [tor_cv_twos_complement=yes],
  1158. [tor_cv_twos_complement=no],
  1159. [tor_cv_twos_complement=cross])])
  1160. if test "$tor_cv_twos_complement" = "cross"; then
  1161. # Cross-compiling; let's hope that the target isn't raving mad.
  1162. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1163. fi
  1164. if test "$tor_cv_twos_complement" != "no"; then
  1165. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1166. [Define to 1 iff we represent negative integers with
  1167. two's complement])
  1168. fi
  1169. # What does shifting a negative value do?
  1170. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1171. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1172. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1173. [tor_cv_sign_extend=yes],
  1174. [tor_cv_sign_extend=no],
  1175. [tor_cv_sign_extend=cross])])
  1176. if test "$tor_cv_sign_extend" = "cross"; then
  1177. # Cross-compiling; let's hope that the target isn't raving mad.
  1178. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1179. fi
  1180. if test "$tor_cv_sign_extend" != "no"; then
  1181. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1182. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1183. fi
  1184. # Whether we should use the dmalloc memory allocation debugging library.
  1185. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1186. AC_ARG_WITH(dmalloc,
  1187. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1188. [if [[ "$withval" = "yes" ]]; then
  1189. dmalloc=1
  1190. AC_MSG_RESULT(yes)
  1191. else
  1192. dmalloc=1
  1193. AC_MSG_RESULT(no)
  1194. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1195. )
  1196. if [[ $dmalloc -eq 1 ]]; then
  1197. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1198. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1199. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1200. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1201. fi
  1202. AC_ARG_WITH(tcmalloc,
  1203. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1204. [ tcmalloc=yes ], [ tcmalloc=no ])
  1205. if test "x$tcmalloc" = "xyes"; then
  1206. LDFLAGS="-ltcmalloc $LDFLAGS"
  1207. fi
  1208. using_custom_malloc=no
  1209. if test "x$enable_openbsd_malloc" = "xyes"; then
  1210. using_custom_malloc=yes
  1211. fi
  1212. if test "x$tcmalloc" = "xyes"; then
  1213. using_custom_malloc=yes
  1214. fi
  1215. if test "$using_custom_malloc" = "no"; then
  1216. AC_CHECK_FUNCS(mallinfo)
  1217. fi
  1218. # By default, we're going to assume we don't have mlockall()
  1219. # bionic and other platforms have various broken mlockall subsystems.
  1220. # Some systems don't have a working mlockall, some aren't linkable,
  1221. # and some have it but don't declare it.
  1222. AC_CHECK_FUNCS(mlockall)
  1223. AC_CHECK_DECLS([mlockall], , , [
  1224. #ifdef HAVE_SYS_MMAN_H
  1225. #include <sys/mman.h>
  1226. #endif])
  1227. # Allow user to specify an alternate syslog facility
  1228. AC_ARG_WITH(syslog-facility,
  1229. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1230. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1231. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1232. AC_SUBST(LOGFACILITY)
  1233. # Check if we have getresuid and getresgid
  1234. AC_CHECK_FUNCS(getresuid getresgid)
  1235. # Check for gethostbyname_r in all its glorious incompatible versions.
  1236. # (This logic is based on that in Python's configure.in)
  1237. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1238. [Define this if you have any gethostbyname_r()])
  1239. AC_CHECK_FUNC(gethostbyname_r, [
  1240. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1241. OLD_CFLAGS=$CFLAGS
  1242. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1243. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1244. #include <netdb.h>
  1245. ], [[
  1246. char *cp1, *cp2;
  1247. struct hostent *h1, *h2;
  1248. int i1, i2;
  1249. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1250. ]])],[
  1251. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1252. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1253. [Define this if gethostbyname_r takes 6 arguments])
  1254. AC_MSG_RESULT(6)
  1255. ], [
  1256. AC_TRY_COMPILE([
  1257. #include <netdb.h>
  1258. ], [
  1259. char *cp1, *cp2;
  1260. struct hostent *h1;
  1261. int i1, i2;
  1262. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1263. ], [
  1264. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1265. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1266. [Define this if gethostbyname_r takes 5 arguments])
  1267. AC_MSG_RESULT(5)
  1268. ], [
  1269. AC_TRY_COMPILE([
  1270. #include <netdb.h>
  1271. ], [
  1272. char *cp1;
  1273. struct hostent *h1;
  1274. struct hostent_data hd;
  1275. (void) gethostbyname_r(cp1,h1,&hd);
  1276. ], [
  1277. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1278. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1279. [Define this if gethostbyname_r takes 3 arguments])
  1280. AC_MSG_RESULT(3)
  1281. ], [
  1282. AC_MSG_RESULT(0)
  1283. ])
  1284. ])
  1285. ])
  1286. CFLAGS=$OLD_CFLAGS
  1287. ])
  1288. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1289. tor_cv_have_func_macro,
  1290. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1291. #include <stdio.h>
  1292. int main(int c, char **v) { puts(__func__); }])],
  1293. tor_cv_have_func_macro=yes,
  1294. tor_cv_have_func_macro=no))
  1295. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1296. tor_cv_have_FUNC_macro,
  1297. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1298. #include <stdio.h>
  1299. int main(int c, char **v) { puts(__FUNC__); }])],
  1300. tor_cv_have_FUNC_macro=yes,
  1301. tor_cv_have_FUNC_macro=no))
  1302. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1303. tor_cv_have_FUNCTION_macro,
  1304. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1305. #include <stdio.h>
  1306. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1307. tor_cv_have_FUNCTION_macro=yes,
  1308. tor_cv_have_FUNCTION_macro=no))
  1309. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1310. tor_cv_have_environ_declared,
  1311. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1312. /* We define _GNU_SOURCE here because it is also defined in compat.c.
  1313. * Without it environ doesn't get declared. */
  1314. #define _GNU_SOURCE
  1315. #ifdef HAVE_UNISTD_H
  1316. #include <unistd.h>
  1317. #endif
  1318. #include <stdlib.h>
  1319. int main(int c, char **v) { char **t = environ; }])],
  1320. tor_cv_have_environ_declared=yes,
  1321. tor_cv_have_environ_declared=no))
  1322. if test "$tor_cv_have_func_macro" = "yes"; then
  1323. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1324. fi
  1325. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1326. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1327. fi
  1328. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1329. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1330. [Defined if the compiler supports __FUNCTION__])
  1331. fi
  1332. if test "$tor_cv_have_environ_declared" = "yes"; then
  1333. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1334. [Defined if we have extern char **environ already declared])
  1335. fi
  1336. # $prefix stores the value of the --prefix command line option, or
  1337. # NONE if the option wasn't set. In the case that it wasn't set, make
  1338. # it be the default, so that we can use it to expand directories now.
  1339. if test "x$prefix" = "xNONE"; then
  1340. prefix=$ac_default_prefix
  1341. fi
  1342. # and similarly for $exec_prefix
  1343. if test "x$exec_prefix" = "xNONE"; then
  1344. exec_prefix=$prefix
  1345. fi
  1346. if test "x$BUILDDIR" = "x"; then
  1347. BUILDDIR=`pwd`
  1348. fi
  1349. AC_SUBST(BUILDDIR)
  1350. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1351. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1352. if test "x$CONFDIR" = "x"; then
  1353. CONFDIR=`eval echo $sysconfdir/tor`
  1354. fi
  1355. AC_SUBST(CONFDIR)
  1356. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1357. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1358. BINDIR=`eval echo $bindir`
  1359. AC_SUBST(BINDIR)
  1360. LOCALSTATEDIR=`eval echo $localstatedir`
  1361. AC_SUBST(LOCALSTATEDIR)
  1362. if test "$bwin32" = "true"; then
  1363. # Test if the linker supports the --nxcompat and --dynamicbase options
  1364. # for Windows
  1365. save_LDFLAGS="$LDFLAGS"
  1366. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1367. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1368. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1369. [AC_MSG_RESULT([yes])]
  1370. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1371. [AC_MSG_RESULT([no])]
  1372. )
  1373. LDFLAGS="$save_LDFLAGS"
  1374. fi
  1375. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1376. # than autoconf's macros like.
  1377. if test "$GCC" = "yes"; then
  1378. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1379. # accident waiting to happen.
  1380. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1381. else
  1382. # Override optimization level for non-gcc compilers
  1383. CFLAGS="$CFLAGS -O"
  1384. enable_gcc_warnings=no
  1385. enable_gcc_warnings_advisory=no
  1386. fi
  1387. # OS X Lion started deprecating the system openssl. Let's just disable
  1388. # all deprecation warnings on OS X. Also, to potentially make the binary
  1389. # a little smaller, let's enable dead_strip.
  1390. case "$host_os" in
  1391. darwin*)
  1392. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1393. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1394. esac
  1395. # Add some more warnings which we use in development but not in the
  1396. # released versions. (Some relevant gcc versions can't handle these.)
  1397. if test "x$enable_gcc_warnings" = "xyes" ||
  1398. test "x$enable_gcc_warnings_advisory" = "xyes"; then
  1399. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1400. #if !defined(__GNUC__) || (__GNUC__ < 4)
  1401. #error
  1402. #endif])], have_gcc4=yes, have_gcc4=no)
  1403. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1404. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)
  1405. #error
  1406. #endif])], have_gcc42=yes, have_gcc42=no)
  1407. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1408. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
  1409. #error
  1410. #endif])], have_gcc43=yes, have_gcc43=no)
  1411. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1412. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)
  1413. #error
  1414. #endif])], have_gcc46=yes, have_gcc46=no)
  1415. save_CFLAGS="$CFLAGS"
  1416. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1417. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], have_shorten64_flag=yes,
  1418. have_shorten64_flag=no)
  1419. CFLAGS="$save_CFLAGS"
  1420. case "$host" in
  1421. *-*-openbsd* | *-*-bitrig*)
  1422. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1423. # That's fine, except that the headers don't pass -Wredundant-decls.
  1424. # Therefore, let's disable -Wsystem-headers when we're building
  1425. # with maximal warnings on OpenBSD.
  1426. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1427. esac
  1428. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1429. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1430. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1431. CFLAGS="$CFLAGS -Wwrite-strings -Wmissing-declarations -Wredundant-decls"
  1432. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1433. if test "x$enable_gcc_warnings" = "xyes"; then
  1434. CFLAGS="$CFLAGS -Werror"
  1435. fi
  1436. # Disabled, so we can use mallinfo(): -Waggregate-return
  1437. if test "x$have_gcc4" = "xyes"; then
  1438. # These warnings break gcc 3.3.5 and work on gcc 4.0.2
  1439. CFLAGS="$CFLAGS -Winit-self -Wmissing-field-initializers -Wold-style-definition"
  1440. fi
  1441. if test "x$have_gcc42" = "xyes"; then
  1442. # These warnings break gcc 4.0.2 and work on gcc 4.2
  1443. # XXXX020 See if any of these work with earlier versions.
  1444. CFLAGS="$CFLAGS -Waddress -Wmissing-noreturn -Wstrict-overflow=1"
  1445. # We used to use -Wstrict-overflow=5, but that breaks us heavily under 4.3.
  1446. fi
  1447. if test "x$have_gcc42" = "xyes" && test "x$have_clang" = "xno"; then
  1448. # These warnings break gcc 4.0.2 and clang, but work on gcc 4.2
  1449. CFLAGS="$CFLAGS -Wnormalized=id -Woverride-init"
  1450. fi
  1451. if test "x$have_gcc43" = "xyes"; then
  1452. # These warnings break gcc 4.2 and work on gcc 4.3
  1453. # XXXX020 See if any of these work with earlier versions.
  1454. CFLAGS="$CFLAGS -Wextra -Warray-bounds"
  1455. fi
  1456. if test "x$have_gcc46" = "xyes"; then
  1457. # This warning was added in gcc 4.3, but it appears to generate
  1458. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1459. CFLAGS="$CFLAGS -Wlogical-op"
  1460. fi
  1461. if test "x$have_shorten64_flag" = "xyes"; then
  1462. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1463. fi
  1464. ##This will break the world on some 64-bit architectures
  1465. # CFLAGS="$CFLAGS -Winline"
  1466. fi
  1467. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1468. case "$host_os" in
  1469. darwin*)
  1470. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-profiling.])
  1471. esac
  1472. fi
  1473. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1474. AC_CONFIG_FILES([
  1475. Doxyfile
  1476. Makefile
  1477. contrib/dist/suse/tor.sh
  1478. contrib/operator-tools/tor.logrotate
  1479. contrib/dist/tor.sh
  1480. contrib/dist/torctl
  1481. contrib/dist/tor.service
  1482. src/config/torrc.sample
  1483. src/config/torrc.minimal
  1484. scripts/maint/checkOptionDocs.pl
  1485. scripts/maint/updateVersions.pl
  1486. ])
  1487. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1488. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1489. for file in $regular_mans ; do
  1490. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1491. echo "==================================";
  1492. echo;
  1493. echo "Building Tor has failed since manpages cannot be built.";
  1494. echo;
  1495. echo "You need asciidoc installed to be able to build the manpages.";
  1496. echo "To build without manpages, use the --disable-asciidoc argument";
  1497. echo "when calling configure.";
  1498. echo;
  1499. echo "==================================";
  1500. exit 1;
  1501. fi
  1502. done
  1503. fi
  1504. AC_OUTPUT