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],[0.2.9.0-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects])
  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 "$bwin32" = "false")
  328. AC_CHECK_FUNCS(
  329. _NSGetEnviron \
  330. RtlSecureZeroMemory \
  331. SecureZeroMemory \
  332. accept4 \
  333. backtrace \
  334. backtrace_symbols_fd \
  335. clock_gettime \
  336. eventfd \
  337. explicit_bzero \
  338. timingsafe_memcmp \
  339. flock \
  340. ftime \
  341. getaddrinfo \
  342. getentropy \
  343. getifaddrs \
  344. getpass \
  345. getrlimit \
  346. gettimeofday \
  347. gmtime_r \
  348. htonll \
  349. inet_aton \
  350. ioctl \
  351. issetugid \
  352. llround \
  353. localtime_r \
  354. lround \
  355. memmem \
  356. memset_s \
  357. pipe \
  358. pipe2 \
  359. prctl \
  360. readpassphrase \
  361. rint \
  362. sigaction \
  363. socketpair \
  364. statvfs \
  365. strlcat \
  366. strlcpy \
  367. strnlen \
  368. strptime \
  369. strtok_r \
  370. strtoull \
  371. sysconf \
  372. sysctl \
  373. uname \
  374. usleep \
  375. vasprintf \
  376. _vscprintf
  377. )
  378. if test "$bwin32" != "true"; then
  379. AC_CHECK_HEADERS(pthread.h)
  380. AC_CHECK_FUNCS(pthread_create)
  381. AC_CHECK_FUNCS(pthread_condattr_setclock)
  382. fi
  383. if test "$bwin32" = "true"; then
  384. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  385. #include <windows.h>
  386. #include <conio.h>
  387. #include <wchar.h>
  388. ])
  389. fi
  390. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  391. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  392. dnl ------------------------------------------------------
  393. dnl Where do you live, libevent? And how do we call you?
  394. if test "$bwin32" = "true"; then
  395. TOR_LIB_WS32=-lws2_32
  396. TOR_LIB_IPHLPAPI=-liphlpapi
  397. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  398. # think it's actually necessary.
  399. TOR_LIB_GDI=-lgdi32
  400. else
  401. TOR_LIB_WS32=
  402. TOR_LIB_GDI=
  403. fi
  404. AC_SUBST(TOR_LIB_WS32)
  405. AC_SUBST(TOR_LIB_GDI)
  406. AC_SUBST(TOR_LIB_IPHLPAPI)
  407. tor_libevent_pkg_redhat="libevent"
  408. tor_libevent_pkg_debian="libevent-dev"
  409. tor_libevent_devpkg_redhat="libevent-devel"
  410. tor_libevent_devpkg_debian="libevent-dev"
  411. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  412. dnl linking for static builds.
  413. STATIC_LIBEVENT_FLAGS=""
  414. if test "$enable_static_libevent" = "yes"; then
  415. if test "$have_rt" = "yes"; then
  416. STATIC_LIBEVENT_FLAGS=" -lrt "
  417. fi
  418. fi
  419. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  420. #ifdef _WIN32
  421. #include <winsock2.h>
  422. #endif
  423. #include <sys/time.h>
  424. #include <sys/types.h>
  425. #include <event.h>], [
  426. #ifdef _WIN32
  427. #include <winsock2.h>
  428. #endif
  429. void *event_init(void);],
  430. [
  431. #ifdef _WIN32
  432. {WSADATA d; WSAStartup(0x101,&d); }
  433. #endif
  434. event_init();
  435. ], [--with-libevent-dir], [/opt/libevent])
  436. dnl Now check for particular libevent functions.
  437. save_LIBS="$LIBS"
  438. save_LDFLAGS="$LDFLAGS"
  439. save_CPPFLAGS="$CPPFLAGS"
  440. LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
  441. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  442. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  443. AC_CHECK_FUNCS([event_get_version_number \
  444. evutil_secure_rng_set_urandom_device_file \
  445. evutil_secure_rng_init \
  446. ])
  447. AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
  448. [#include <event.h>
  449. ])
  450. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  451. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  452. AM_CONDITIONAL(USE_EXTERNAL_EVDNS,
  453. test "x$ac_cv_header_event2_dns_h" = "xyes")
  454. if test "$enable_static_libevent" = "yes"; then
  455. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  456. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  457. else
  458. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  459. fi
  460. else
  461. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  462. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  463. 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"))
  464. if test "$ac_cv_search_event_new" != "none required"; then
  465. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  466. fi
  467. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  468. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  469. fi
  470. else
  471. TOR_LIBEVENT_LIBS="-levent"
  472. fi
  473. fi
  474. LIBS="$save_LIBS"
  475. LDFLAGS="$save_LDFLAGS"
  476. CPPFLAGS="$save_CPPFLAGS"
  477. dnl This isn't the best test for Libevent 2.0.3-alpha. Once it's released,
  478. dnl we can do much better.
  479. if test "$enable_bufferevents" = "yes"; then
  480. if test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes"; then
  481. 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.])
  482. else
  483. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  484. # Check for the right version. First see if version detection works.
  485. AC_MSG_CHECKING([whether we can detect the Libevent version])
  486. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  487. #include <event2/event.h>
  488. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 10
  489. #error
  490. int x = y(zz);
  491. #else
  492. int x = 1;
  493. #endif
  494. ])], [event_version_number_works=yes; AC_MSG_RESULT([yes]) ],
  495. [event_version_number_works=no; AC_MSG_RESULT([no])])
  496. if test "$event_version_number_works" != "yes"; then
  497. AC_MSG_WARN([Version detection on Libevent seems broken. Your Libevent installation is probably screwed up or very old.])
  498. else
  499. AC_MSG_CHECKING([whether Libevent is new enough for bufferevents])
  500. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  501. #include <event2/event.h>
  502. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000d00
  503. #error
  504. int x = y(zz);
  505. #else
  506. int x = 1;
  507. #endif
  508. ])], [ AC_MSG_RESULT([yes]) ],
  509. [ AC_MSG_RESULT([no])
  510. AC_MSG_ERROR([Libevent does not seem new enough to support bufferevents. We require 2.0.13-stable or later]) ] )
  511. fi
  512. fi
  513. fi
  514. LIBS="$save_LIBS"
  515. LDFLAGS="$save_LDFLAGS"
  516. CPPFLAGS="$save_CPPFLAGS"
  517. AM_CONDITIONAL(USE_BUFFEREVENTS, test "$enable_bufferevents" = "yes")
  518. if test "$enable_bufferevents" = "yes"; then
  519. AC_DEFINE(USE_BUFFEREVENTS, 1, [Defined if we're going to use Libevent's buffered IO API])
  520. if test "$enable_static_libevent" = "yes"; then
  521. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent_openssl.a $TOR_LIBEVENT_LIBS"
  522. else
  523. TOR_LIBEVENT_LIBS="-levent_openssl $TOR_LIBEVENT_LIBS"
  524. fi
  525. fi
  526. AC_SUBST(TOR_LIBEVENT_LIBS)
  527. dnl ------------------------------------------------------
  528. dnl Where do you live, libm?
  529. dnl On some platforms (Haiku/BeOS) the math library is
  530. dnl part of libroot. In which case don't link against lm
  531. TOR_LIB_MATH=""
  532. save_LIBS="$LIBS"
  533. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  534. if test "$ac_cv_search_pow" != "none required"; then
  535. TOR_LIB_MATH="$ac_cv_search_pow"
  536. fi
  537. LIBS="$save_LIBS"
  538. AC_SUBST(TOR_LIB_MATH)
  539. dnl ------------------------------------------------------
  540. dnl Where do you live, openssl? And how do we call you?
  541. tor_openssl_pkg_redhat="openssl"
  542. tor_openssl_pkg_debian="libssl-dev"
  543. tor_openssl_devpkg_redhat="openssl-devel"
  544. tor_openssl_devpkg_debian="libssl-dev"
  545. ALT_openssl_WITHVAL=""
  546. AC_ARG_WITH(ssl-dir,
  547. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  548. [
  549. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  550. ALT_openssl_WITHVAL="$withval"
  551. fi
  552. ])
  553. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  554. [#include <openssl/rand.h>],
  555. [void RAND_add(const void *buf, int num, double entropy);],
  556. [RAND_add((void*)0,0,0);], [],
  557. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  558. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  559. if test "$enable_static_openssl" = "yes"; then
  560. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  561. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  562. else
  563. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  564. fi
  565. else
  566. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  567. fi
  568. AC_SUBST(TOR_OPENSSL_LIBS)
  569. dnl Now check for particular openssl functions.
  570. save_LIBS="$LIBS"
  571. save_LDFLAGS="$LDFLAGS"
  572. save_CPPFLAGS="$CPPFLAGS"
  573. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  574. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  575. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  576. AC_TRY_COMPILE([
  577. #include <openssl/opensslv.h>
  578. #if OPENSSL_VERSION_NUMBER < 0x1000000fL
  579. #error "too old"
  580. #endif
  581. ], [],
  582. [ : ],
  583. [ AC_ERROR([OpenSSL is too old. We require 1.0.0 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  584. AC_TRY_COMPILE([
  585. #include <openssl/opensslv.h>
  586. #include <openssl/evp.h>
  587. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  588. #error "no ECC"
  589. #endif
  590. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  591. #error "curves unavailable"
  592. #endif
  593. ], [],
  594. [ : ],
  595. [ AC_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  596. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  597. [#include <openssl/ssl.h>
  598. ])
  599. AC_CHECK_FUNCS([ \
  600. SSL_SESSION_get_master_key \
  601. SSL_get_server_random \
  602. SSL_get_client_ciphers \
  603. SSL_get_client_random \
  604. SSL_CIPHER_find \
  605. TLS_method
  606. ])
  607. dnl Check if OpenSSL has scrypt implementation.
  608. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  609. LIBS="$save_LIBS"
  610. LDFLAGS="$save_LDFLAGS"
  611. CPPFLAGS="$save_CPPFLAGS"
  612. dnl ------------------------------------------------------
  613. dnl Where do you live, zlib? And how do we call you?
  614. tor_zlib_pkg_redhat="zlib"
  615. tor_zlib_pkg_debian="zlib1g"
  616. tor_zlib_devpkg_redhat="zlib-devel"
  617. tor_zlib_devpkg_debian="zlib1g-dev"
  618. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  619. [#include <zlib.h>],
  620. [const char * zlibVersion(void);],
  621. [zlibVersion();], [--with-zlib-dir],
  622. [/opt/zlib])
  623. if test "$enable_static_zlib" = "yes"; then
  624. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  625. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  626. using --enable-static-zlib")
  627. else
  628. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  629. fi
  630. else
  631. TOR_ZLIB_LIBS="-lz"
  632. fi
  633. AC_SUBST(TOR_ZLIB_LIBS)
  634. dnl ----------------------------------------------------------------------
  635. dnl Check if libcap is available for capabilities.
  636. tor_cap_pkg_debian="libcap2"
  637. tor_cap_pkg_redhat="libcap"
  638. tor_cap_devpkg_debian="libcap-dev"
  639. tor_cap_devpkg_redhat="libcap-devel"
  640. AC_CHECK_LIB([cap], [cap_init], [],
  641. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  642. )
  643. AC_CHECK_FUNCS(cap_set_proc)
  644. dnl ---------------------------------------------------------------------
  645. dnl Now that we know about our major libraries, we can check for compiler
  646. dnl and linker hardening options. We need to do this with the libraries known,
  647. dnl since sometimes the linker will like an option but not be willing to
  648. dnl use it with a build of a library.
  649. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  650. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  651. CFLAGS_FTRAPV=
  652. CFLAGS_FWRAPV=
  653. CFLAGS_ASAN=
  654. CFLAGS_UBSAN=
  655. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  656. #if !defined(__clang__)
  657. #error
  658. #endif])], have_clang=yes, have_clang=no)
  659. if test "x$enable_gcc_hardening" != "xno"; then
  660. CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
  661. if test "x$have_clang" = "xyes"; then
  662. TOR_CHECK_CFLAGS(-Qunused-arguments)
  663. fi
  664. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  665. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  666. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  667. m4_ifdef([AS_VAR_IF],[
  668. AS_VAR_IF(can_compile, [yes],
  669. AS_VAR_IF(can_link, [yes],
  670. [],
  671. AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
  672. )])
  673. AS_VAR_POPDEF([can_link])
  674. AS_VAR_POPDEF([can_compile])
  675. TOR_CHECK_CFLAGS(-Wstack-protector)
  676. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  677. if test "$bwin32" = "false"; then
  678. TOR_CHECK_CFLAGS(-fPIE)
  679. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  680. fi
  681. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, , CFLAGS_FTRAPV="-ftrapv", true)
  682. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, , CFLAGS_FWRAPV="-fwrapv", true)
  683. fi
  684. if test "x$enable_expensive_hardening" = "xyes"; then
  685. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], , CFLAGS_ASAN="-fsanitize=address", true)
  686. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], , CFLAGS_UBSAN="-fsanitize=undefined", true)
  687. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  688. fi
  689. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  690. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  691. dnl These cflags add bunches of branches, and we haven't been able to
  692. dnl persuade ourselves that they're suitable for code that needs to be
  693. dnl constant time.
  694. AC_SUBST(CFLAGS_BUGTRAP)
  695. dnl These cflags are variant ones sutable for code that needs to be
  696. dnl constant-time.
  697. AC_SUBST(CFLAGS_CONSTTIME)
  698. if test "x$enable_linker_hardening" != "xno"; then
  699. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  700. fi
  701. # For backtrace support
  702. TOR_CHECK_LDFLAGS(-rdynamic)
  703. dnl ------------------------------------------------------
  704. dnl Now see if we have a -fomit-frame-pointer compiler option.
  705. saved_CFLAGS="$CFLAGS"
  706. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  707. F_OMIT_FRAME_POINTER=''
  708. if test "$saved_CFLAGS" != "$CFLAGS"; then
  709. if test "x$enable_expensive_hardening" != "xyes"; then
  710. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  711. fi
  712. fi
  713. CFLAGS="$saved_CFLAGS"
  714. AC_SUBST(F_OMIT_FRAME_POINTER)
  715. dnl ------------------------------------------------------
  716. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  717. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  718. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  719. dnl code will work.
  720. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  721. dnl ============================================================
  722. dnl Check for libseccomp
  723. if test "x$enable_seccomp" != "xno"; then
  724. AC_CHECK_HEADERS([seccomp.h])
  725. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  726. fi
  727. dnl ============================================================
  728. dnl Check for libscrypt
  729. if test "x$enable_libscrypt" != "xno"; then
  730. AC_CHECK_HEADERS([libscrypt.h])
  731. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  732. fi
  733. dnl ============================================================
  734. dnl We need an implementation of curve25519.
  735. dnl set these defaults.
  736. build_curve25519_donna=no
  737. build_curve25519_donna_c64=no
  738. use_curve25519_donna=no
  739. use_curve25519_nacl=no
  740. CURVE25519_LIBS=
  741. dnl The best choice is using curve25519-donna-c64, but that requires
  742. dnl that we
  743. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  744. tor_cv_can_use_curve25519_donna_c64,
  745. [AC_RUN_IFELSE(
  746. [AC_LANG_PROGRAM([dnl
  747. #include <stdint.h>
  748. typedef unsigned uint128_t __attribute__((mode(TI)));
  749. int func(uint64_t a, uint64_t b) {
  750. uint128_t c = ((uint128_t)a) * b;
  751. int ok = ((uint64_t)(c>>96)) == 522859 &&
  752. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  753. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  754. (((uint64_t)(c))&0xffffffffL) == 0;
  755. return ok;
  756. }
  757. ], [dnl
  758. int ok = func( ((uint64_t)2000000000) * 1000000000,
  759. ((uint64_t)1234567890) << 24);
  760. return !ok;
  761. ])],
  762. [tor_cv_can_use_curve25519_donna_c64=yes],
  763. [tor_cv_can_use_curve25519_donna_c64=no],
  764. [AC_LINK_IFELSE(
  765. [AC_LANG_PROGRAM([dnl
  766. #include <stdint.h>
  767. typedef unsigned uint128_t __attribute__((mode(TI)));
  768. int func(uint64_t a, uint64_t b) {
  769. uint128_t c = ((uint128_t)a) * b;
  770. int ok = ((uint64_t)(c>>96)) == 522859 &&
  771. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  772. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  773. (((uint64_t)(c))&0xffffffffL) == 0;
  774. return ok;
  775. }
  776. ], [dnl
  777. int ok = func( ((uint64_t)2000000000) * 1000000000,
  778. ((uint64_t)1234567890) << 24);
  779. return !ok;
  780. ])],
  781. [tor_cv_can_use_curve25519_donna_c64=cross],
  782. [tor_cv_can_use_curve25519_donna_c64=no])])])
  783. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  784. nacl/crypto_scalarmult_curve25519.h])
  785. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  786. tor_cv_can_use_curve25519_nacl,
  787. [tor_saved_LIBS="$LIBS"
  788. LIBS="$LIBS -lnacl"
  789. AC_LINK_IFELSE(
  790. [AC_LANG_PROGRAM([dnl
  791. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  792. #include <crypto_scalarmult_curve25519.h>
  793. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  794. #include <nacl/crypto_scalarmult_curve25519.h>
  795. #endif
  796. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  797. #error Hey, this is the reference implementation! That's not fast.
  798. #endif
  799. ], [
  800. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  801. ])], [tor_cv_can_use_curve25519_nacl=yes],
  802. [tor_cv_can_use_curve25519_nacl=no])
  803. LIBS="$tor_saved_LIBS" ])
  804. dnl Okay, now we need to figure out which one to actually use. Fall back
  805. dnl to curve25519-donna.c
  806. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  807. build_curve25519_donna_c64=yes
  808. use_curve25519_donna=yes
  809. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  810. use_curve25519_nacl=yes
  811. CURVE25519_LIBS=-lnacl
  812. else
  813. build_curve25519_donna=yes
  814. use_curve25519_donna=yes
  815. fi
  816. if test "x$use_curve25519_donna" = "xyes"; then
  817. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  818. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  819. fi
  820. if test "x$use_curve25519_nacl" = "xyes"; then
  821. AC_DEFINE(USE_CURVE25519_NACL, 1,
  822. [Defined if we should use a curve25519 from nacl])
  823. fi
  824. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  825. test "x$build_curve25519_donna" = "xyes")
  826. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  827. test "x$build_curve25519_donna_c64" = "xyes")
  828. AC_SUBST(CURVE25519_LIBS)
  829. dnl Make sure to enable support for large off_t if available.
  830. AC_SYS_LARGEFILE
  831. AC_CHECK_HEADERS(
  832. assert.h \
  833. errno.h \
  834. fcntl.h \
  835. signal.h \
  836. string.h \
  837. sys/capability.h \
  838. sys/fcntl.h \
  839. sys/stat.h \
  840. sys/time.h \
  841. sys/types.h \
  842. time.h \
  843. unistd.h
  844. , , 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.))
  845. dnl These headers are not essential
  846. AC_CHECK_HEADERS(
  847. arpa/inet.h \
  848. crt_externs.h \
  849. execinfo.h \
  850. grp.h \
  851. ifaddrs.h \
  852. inttypes.h \
  853. limits.h \
  854. linux/types.h \
  855. machine/limits.h \
  856. malloc.h \
  857. malloc/malloc.h \
  858. malloc_np.h \
  859. netdb.h \
  860. netinet/in.h \
  861. netinet/in6.h \
  862. pwd.h \
  863. readpassphrase.h \
  864. stdint.h \
  865. sys/eventfd.h \
  866. sys/file.h \
  867. sys/ioctl.h \
  868. sys/limits.h \
  869. sys/mman.h \
  870. sys/param.h \
  871. sys/prctl.h \
  872. sys/resource.h \
  873. sys/select.h \
  874. sys/socket.h \
  875. sys/statvfs.h \
  876. sys/syscall.h \
  877. sys/sysctl.h \
  878. sys/syslimits.h \
  879. sys/time.h \
  880. sys/types.h \
  881. sys/un.h \
  882. sys/utime.h \
  883. sys/wait.h \
  884. syslog.h \
  885. utime.h
  886. )
  887. AC_CHECK_HEADERS(sys/param.h)
  888. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  889. [#ifdef HAVE_SYS_TYPES_H
  890. #include <sys/types.h>
  891. #endif
  892. #ifdef HAVE_SYS_SOCKET_H
  893. #include <sys/socket.h>
  894. #endif])
  895. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  896. [#ifdef HAVE_SYS_TYPES_H
  897. #include <sys/types.h>
  898. #endif
  899. #ifdef HAVE_SYS_SOCKET_H
  900. #include <sys/socket.h>
  901. #endif
  902. #ifdef HAVE_NET_IF_H
  903. #include <net/if.h>
  904. #endif
  905. #ifdef HAVE_NETINET_IN_H
  906. #include <netinet/in.h>
  907. #endif])
  908. AC_CHECK_HEADERS(linux/if.h,[],[],
  909. [
  910. #ifdef HAVE_SYS_SOCKET_H
  911. #include <sys/socket.h>
  912. #endif
  913. ])
  914. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  915. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  916. [#ifdef HAVE_SYS_TYPES_H
  917. #include <sys/types.h>
  918. #endif
  919. #ifdef HAVE_SYS_SOCKET_H
  920. #include <sys/socket.h>
  921. #endif
  922. #ifdef HAVE_LIMITS_H
  923. #include <limits.h>
  924. #endif
  925. #ifdef HAVE_LINUX_TYPES_H
  926. #include <linux/types.h>
  927. #endif
  928. #ifdef HAVE_NETINET_IN6_H
  929. #include <netinet/in6.h>
  930. #endif
  931. #ifdef HAVE_NETINET_IN_H
  932. #include <netinet/in.h>
  933. #endif])
  934. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  935. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  936. [#ifdef HAVE_SYS_TYPES_H
  937. #include <sys/types.h>
  938. #endif
  939. #ifdef HAVE_SYS_SOCKET_H
  940. #include <sys/socket.h>
  941. #endif
  942. #ifdef HAVE_LIMITS_H
  943. #include <limits.h>
  944. #endif
  945. #ifdef HAVE_LINUX_TYPES_H
  946. #include <linux/types.h>
  947. #endif
  948. #ifdef HAVE_NETINET_IN6_H
  949. #include <netinet/in6.h>
  950. #endif
  951. #ifdef HAVE_NETINET_IN_H
  952. #include <netinet/in.h>
  953. #endif
  954. #ifdef HAVE_LINUX_IF_H
  955. #include <linux/if.h>
  956. #endif])
  957. if test "x$transparent" = "xtrue"; then
  958. transparent_ok=0
  959. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  960. transparent_ok=1
  961. fi
  962. if test "x$linux_netfilter_ipv4" = "x1"; then
  963. transparent_ok=1
  964. fi
  965. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  966. transparent_ok=1
  967. fi
  968. if test "x$transparent_ok" = "x1"; then
  969. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  970. case "$host" in
  971. *-*-openbsd* | *-*-bitrig*)
  972. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  973. esac
  974. else
  975. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  976. fi
  977. fi
  978. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  979. [#ifdef HAVE_SYS_TYPES_H
  980. #include <sys/types.h>
  981. #endif
  982. #ifdef HAVE_SYS_TIME_H
  983. #include <sys/time.h>
  984. #endif])
  985. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  986. dnl Watch out.
  987. AC_CHECK_SIZEOF(int8_t)
  988. AC_CHECK_SIZEOF(int16_t)
  989. AC_CHECK_SIZEOF(int32_t)
  990. AC_CHECK_SIZEOF(int64_t)
  991. AC_CHECK_SIZEOF(uint8_t)
  992. AC_CHECK_SIZEOF(uint16_t)
  993. AC_CHECK_SIZEOF(uint32_t)
  994. AC_CHECK_SIZEOF(uint64_t)
  995. AC_CHECK_SIZEOF(intptr_t)
  996. AC_CHECK_SIZEOF(uintptr_t)
  997. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  998. AC_CHECK_SIZEOF(char)
  999. AC_CHECK_SIZEOF(short)
  1000. AC_CHECK_SIZEOF(int)
  1001. AC_CHECK_SIZEOF(long)
  1002. AC_CHECK_SIZEOF(long long)
  1003. AC_CHECK_SIZEOF(__int64)
  1004. AC_CHECK_SIZEOF(void *)
  1005. AC_CHECK_SIZEOF(time_t)
  1006. AC_CHECK_SIZEOF(size_t)
  1007. AC_CHECK_SIZEOF(pid_t)
  1008. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1009. AC_PC_FROM_UCONTEXT([:])
  1010. dnl used to include sockaddr_storage, but everybody has that.
  1011. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1012. [#ifdef HAVE_SYS_TYPES_H
  1013. #include <sys/types.h>
  1014. #endif
  1015. #ifdef HAVE_NETINET_IN_H
  1016. #include <netinet/in.h>
  1017. #endif
  1018. #ifdef HAVE_NETINET_IN6_H
  1019. #include <netinet/in6.h>
  1020. #endif
  1021. #ifdef HAVE_SYS_SOCKET_H
  1022. #include <sys/socket.h>
  1023. #endif
  1024. #ifdef _WIN32
  1025. #define _WIN32_WINNT 0x0501
  1026. #define WIN32_LEAN_AND_MEAN
  1027. #include <winsock2.h>
  1028. #include <ws2tcpip.h>
  1029. #endif
  1030. ])
  1031. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1032. [#ifdef HAVE_SYS_TYPES_H
  1033. #include <sys/types.h>
  1034. #endif
  1035. #ifdef HAVE_NETINET_IN_H
  1036. #include <netinet/in.h>
  1037. #endif
  1038. #ifdef HAVE_NETINET_IN6_H
  1039. #include <netinet/in6.h>
  1040. #endif
  1041. #ifdef HAVE_SYS_SOCKET_H
  1042. #include <sys/socket.h>
  1043. #endif
  1044. #ifdef _WIN32
  1045. #define _WIN32_WINNT 0x0501
  1046. #define WIN32_LEAN_AND_MEAN
  1047. #include <winsock2.h>
  1048. #include <ws2tcpip.h>
  1049. #endif
  1050. ])
  1051. AC_CHECK_TYPES([rlim_t], , ,
  1052. [#ifdef HAVE_SYS_TYPES_H
  1053. #include <sys/types.h>
  1054. #endif
  1055. #ifdef HAVE_SYS_TIME_H
  1056. #include <sys/time.h>
  1057. #endif
  1058. #ifdef HAVE_SYS_RESOURCE_H
  1059. #include <sys/resource.h>
  1060. #endif
  1061. ])
  1062. AX_CHECK_SIGN([time_t],
  1063. [ : ],
  1064. [ : ], [
  1065. #ifdef HAVE_SYS_TYPES_H
  1066. #include <sys/types.h>
  1067. #endif
  1068. #ifdef HAVE_SYS_TIME_H
  1069. #include <sys/time.h>
  1070. #endif
  1071. #ifdef HAVE_TIME_H
  1072. #include <time.h>
  1073. #endif
  1074. ])
  1075. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1076. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1077. fi
  1078. AX_CHECK_SIGN([size_t],
  1079. [ tor_cv_size_t_signed=yes ],
  1080. [ tor_cv_size_t_signed=no ], [
  1081. #ifdef HAVE_SYS_TYPES_H
  1082. #include <sys/types.h>
  1083. #endif
  1084. ])
  1085. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1086. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1087. fi
  1088. AX_CHECK_SIGN([enum always],
  1089. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1090. [ : ], [
  1091. enum always { AAA, BBB, CCC };
  1092. ])
  1093. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1094. #ifdef HAVE_SYS_SOCKET_H
  1095. #include <sys/socket.h>
  1096. #endif
  1097. ])
  1098. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1099. AC_CHECK_SIZEOF(cell_t)
  1100. # Now make sure that NULL can be represented as zero bytes.
  1101. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1102. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1103. [[#include <stdlib.h>
  1104. #include <string.h>
  1105. #include <stdio.h>
  1106. #ifdef HAVE_STDDEF_H
  1107. #include <stddef.h>
  1108. #endif
  1109. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1110. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1111. [tor_cv_null_is_zero=yes],
  1112. [tor_cv_null_is_zero=no],
  1113. [tor_cv_null_is_zero=cross])])
  1114. if test "$tor_cv_null_is_zero" = "cross"; then
  1115. # Cross-compiling; let's hope that the target isn't raving mad.
  1116. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1117. fi
  1118. if test "$tor_cv_null_is_zero" != "no"; then
  1119. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1120. [Define to 1 iff memset(0) sets pointers to NULL])
  1121. fi
  1122. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1123. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1124. [[#include <stdlib.h>
  1125. #include <string.h>
  1126. #include <stdio.h>
  1127. #ifdef HAVE_STDDEF_H
  1128. #include <stddef.h>
  1129. #endif
  1130. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1131. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1132. [tor_cv_dbl0_is_zero=yes],
  1133. [tor_cv_dbl0_is_zero=no],
  1134. [tor_cv_dbl0_is_zero=cross])])
  1135. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1136. # Cross-compiling; let's hope that the target isn't raving mad.
  1137. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1138. fi
  1139. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1140. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1141. [Define to 1 iff memset(0) sets doubles to 0.0])
  1142. fi
  1143. # And what happens when we malloc zero?
  1144. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1145. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1146. [[#include <stdlib.h>
  1147. #include <string.h>
  1148. #include <stdio.h>
  1149. #ifdef HAVE_STDDEF_H
  1150. #include <stddef.h>
  1151. #endif
  1152. int main () { return malloc(0)?0:1; }]])],
  1153. [tor_cv_malloc_zero_works=yes],
  1154. [tor_cv_malloc_zero_works=no],
  1155. [tor_cv_malloc_zero_works=cross])])
  1156. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1157. # Cross-compiling; let's hope that the target isn't raving mad.
  1158. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1159. fi
  1160. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1161. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1162. [Define to 1 iff malloc(0) returns a pointer])
  1163. fi
  1164. # whether we seem to be in a 2s-complement world.
  1165. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1166. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1167. [[int main () { int problem = ((-99) != (~99)+1);
  1168. return problem ? 1 : 0; }]])],
  1169. [tor_cv_twos_complement=yes],
  1170. [tor_cv_twos_complement=no],
  1171. [tor_cv_twos_complement=cross])])
  1172. if test "$tor_cv_twos_complement" = "cross"; then
  1173. # Cross-compiling; let's hope that the target isn't raving mad.
  1174. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1175. fi
  1176. if test "$tor_cv_twos_complement" != "no"; then
  1177. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1178. [Define to 1 iff we represent negative integers with
  1179. two's complement])
  1180. fi
  1181. # What does shifting a negative value do?
  1182. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1183. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1184. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1185. [tor_cv_sign_extend=yes],
  1186. [tor_cv_sign_extend=no],
  1187. [tor_cv_sign_extend=cross])])
  1188. if test "$tor_cv_sign_extend" = "cross"; then
  1189. # Cross-compiling; let's hope that the target isn't raving mad.
  1190. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1191. fi
  1192. if test "$tor_cv_sign_extend" != "no"; then
  1193. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1194. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1195. fi
  1196. # Whether we should use the dmalloc memory allocation debugging library.
  1197. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1198. AC_ARG_WITH(dmalloc,
  1199. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1200. [if [[ "$withval" = "yes" ]]; then
  1201. dmalloc=1
  1202. AC_MSG_RESULT(yes)
  1203. else
  1204. dmalloc=1
  1205. AC_MSG_RESULT(no)
  1206. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1207. )
  1208. if [[ $dmalloc -eq 1 ]]; then
  1209. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1210. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1211. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1212. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1213. fi
  1214. AC_ARG_WITH(tcmalloc,
  1215. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1216. [ tcmalloc=yes ], [ tcmalloc=no ])
  1217. if test "x$tcmalloc" = "xyes"; then
  1218. LDFLAGS="-ltcmalloc $LDFLAGS"
  1219. fi
  1220. using_custom_malloc=no
  1221. if test "x$enable_openbsd_malloc" = "xyes"; then
  1222. using_custom_malloc=yes
  1223. fi
  1224. if test "x$tcmalloc" = "xyes"; then
  1225. using_custom_malloc=yes
  1226. fi
  1227. if test "$using_custom_malloc" = "no"; then
  1228. AC_CHECK_FUNCS(mallinfo)
  1229. fi
  1230. # By default, we're going to assume we don't have mlockall()
  1231. # bionic and other platforms have various broken mlockall subsystems.
  1232. # Some systems don't have a working mlockall, some aren't linkable,
  1233. # and some have it but don't declare it.
  1234. AC_CHECK_FUNCS(mlockall)
  1235. AC_CHECK_DECLS([mlockall], , , [
  1236. #ifdef HAVE_SYS_MMAN_H
  1237. #include <sys/mman.h>
  1238. #endif])
  1239. # Allow user to specify an alternate syslog facility
  1240. AC_ARG_WITH(syslog-facility,
  1241. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1242. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1243. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1244. AC_SUBST(LOGFACILITY)
  1245. # Check if we have getresuid and getresgid
  1246. AC_CHECK_FUNCS(getresuid getresgid)
  1247. # Check for gethostbyname_r in all its glorious incompatible versions.
  1248. # (This logic is based on that in Python's configure.in)
  1249. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1250. [Define this if you have any gethostbyname_r()])
  1251. AC_CHECK_FUNC(gethostbyname_r, [
  1252. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1253. OLD_CFLAGS=$CFLAGS
  1254. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1255. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1256. #include <netdb.h>
  1257. ], [[
  1258. char *cp1, *cp2;
  1259. struct hostent *h1, *h2;
  1260. int i1, i2;
  1261. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1262. ]])],[
  1263. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1264. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1265. [Define this if gethostbyname_r takes 6 arguments])
  1266. AC_MSG_RESULT(6)
  1267. ], [
  1268. AC_TRY_COMPILE([
  1269. #include <netdb.h>
  1270. ], [
  1271. char *cp1, *cp2;
  1272. struct hostent *h1;
  1273. int i1, i2;
  1274. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1275. ], [
  1276. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1277. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1278. [Define this if gethostbyname_r takes 5 arguments])
  1279. AC_MSG_RESULT(5)
  1280. ], [
  1281. AC_TRY_COMPILE([
  1282. #include <netdb.h>
  1283. ], [
  1284. char *cp1;
  1285. struct hostent *h1;
  1286. struct hostent_data hd;
  1287. (void) gethostbyname_r(cp1,h1,&hd);
  1288. ], [
  1289. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1290. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1291. [Define this if gethostbyname_r takes 3 arguments])
  1292. AC_MSG_RESULT(3)
  1293. ], [
  1294. AC_MSG_RESULT(0)
  1295. ])
  1296. ])
  1297. ])
  1298. CFLAGS=$OLD_CFLAGS
  1299. ])
  1300. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1301. tor_cv_have_func_macro,
  1302. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1303. #include <stdio.h>
  1304. int main(int c, char **v) { puts(__func__); }])],
  1305. tor_cv_have_func_macro=yes,
  1306. tor_cv_have_func_macro=no))
  1307. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1308. tor_cv_have_FUNC_macro,
  1309. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1310. #include <stdio.h>
  1311. int main(int c, char **v) { puts(__FUNC__); }])],
  1312. tor_cv_have_FUNC_macro=yes,
  1313. tor_cv_have_FUNC_macro=no))
  1314. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1315. tor_cv_have_FUNCTION_macro,
  1316. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1317. #include <stdio.h>
  1318. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1319. tor_cv_have_FUNCTION_macro=yes,
  1320. tor_cv_have_FUNCTION_macro=no))
  1321. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1322. tor_cv_have_environ_declared,
  1323. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1324. /* We define _GNU_SOURCE here because it is also defined in compat.c.
  1325. * Without it environ doesn't get declared. */
  1326. #define _GNU_SOURCE
  1327. #ifdef HAVE_UNISTD_H
  1328. #include <unistd.h>
  1329. #endif
  1330. #include <stdlib.h>
  1331. int main(int c, char **v) { char **t = environ; }])],
  1332. tor_cv_have_environ_declared=yes,
  1333. tor_cv_have_environ_declared=no))
  1334. if test "$tor_cv_have_func_macro" = "yes"; then
  1335. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1336. fi
  1337. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1338. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1339. fi
  1340. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1341. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1342. [Defined if the compiler supports __FUNCTION__])
  1343. fi
  1344. if test "$tor_cv_have_environ_declared" = "yes"; then
  1345. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1346. [Defined if we have extern char **environ already declared])
  1347. fi
  1348. # $prefix stores the value of the --prefix command line option, or
  1349. # NONE if the option wasn't set. In the case that it wasn't set, make
  1350. # it be the default, so that we can use it to expand directories now.
  1351. if test "x$prefix" = "xNONE"; then
  1352. prefix=$ac_default_prefix
  1353. fi
  1354. # and similarly for $exec_prefix
  1355. if test "x$exec_prefix" = "xNONE"; then
  1356. exec_prefix=$prefix
  1357. fi
  1358. if test "x$BUILDDIR" = "x"; then
  1359. BUILDDIR=`pwd`
  1360. fi
  1361. AC_SUBST(BUILDDIR)
  1362. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1363. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1364. if test "x$CONFDIR" = "x"; then
  1365. CONFDIR=`eval echo $sysconfdir/tor`
  1366. fi
  1367. AC_SUBST(CONFDIR)
  1368. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1369. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1370. BINDIR=`eval echo $bindir`
  1371. AC_SUBST(BINDIR)
  1372. LOCALSTATEDIR=`eval echo $localstatedir`
  1373. AC_SUBST(LOCALSTATEDIR)
  1374. if test "$bwin32" = "true"; then
  1375. # Test if the linker supports the --nxcompat and --dynamicbase options
  1376. # for Windows
  1377. save_LDFLAGS="$LDFLAGS"
  1378. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1379. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1380. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1381. [AC_MSG_RESULT([yes])]
  1382. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1383. [AC_MSG_RESULT([no])]
  1384. )
  1385. LDFLAGS="$save_LDFLAGS"
  1386. fi
  1387. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1388. # than autoconf's macros like.
  1389. if test "$GCC" = "yes"; then
  1390. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1391. # accident waiting to happen.
  1392. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1393. else
  1394. # Override optimization level for non-gcc compilers
  1395. CFLAGS="$CFLAGS -O"
  1396. enable_gcc_warnings=no
  1397. enable_gcc_warnings_advisory=no
  1398. fi
  1399. # OS X Lion started deprecating the system openssl. Let's just disable
  1400. # all deprecation warnings on OS X. Also, to potentially make the binary
  1401. # a little smaller, let's enable dead_strip.
  1402. case "$host_os" in
  1403. darwin*)
  1404. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1405. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1406. esac
  1407. # Add some more warnings which we use in development but not in the
  1408. # released versions. (Some relevant gcc versions can't handle these.)
  1409. if test "x$enable_gcc_warnings" = "xyes" ||
  1410. test "x$enable_gcc_warnings_advisory" = "xyes"; then
  1411. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1412. #if !defined(__GNUC__) || (__GNUC__ < 4)
  1413. #error
  1414. #endif])], have_gcc4=yes, have_gcc4=no)
  1415. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1416. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)
  1417. #error
  1418. #endif])], have_gcc42=yes, have_gcc42=no)
  1419. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1420. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
  1421. #error
  1422. #endif])], have_gcc43=yes, have_gcc43=no)
  1423. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1424. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)
  1425. #error
  1426. #endif])], have_gcc46=yes, have_gcc46=no)
  1427. save_CFLAGS="$CFLAGS"
  1428. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1429. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], have_shorten64_flag=yes,
  1430. have_shorten64_flag=no)
  1431. CFLAGS="$save_CFLAGS"
  1432. case "$host" in
  1433. *-*-openbsd* | *-*-bitrig*)
  1434. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1435. # That's fine, except that the headers don't pass -Wredundant-decls.
  1436. # Therefore, let's disable -Wsystem-headers when we're building
  1437. # with maximal warnings on OpenBSD.
  1438. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1439. esac
  1440. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1441. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1442. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1443. CFLAGS="$CFLAGS -Wwrite-strings -Wmissing-declarations -Wredundant-decls"
  1444. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1445. if test "x$enable_gcc_warnings" = "xyes"; then
  1446. CFLAGS="$CFLAGS -Werror"
  1447. fi
  1448. # Disabled, so we can use mallinfo(): -Waggregate-return
  1449. if test "x$have_gcc4" = "xyes"; then
  1450. # These warnings break gcc 3.3.5 and work on gcc 4.0.2
  1451. CFLAGS="$CFLAGS -Winit-self -Wmissing-field-initializers -Wold-style-definition"
  1452. fi
  1453. if test "x$have_gcc42" = "xyes"; then
  1454. # These warnings break gcc 4.0.2 and work on gcc 4.2
  1455. # XXXX020 See if any of these work with earlier versions.
  1456. CFLAGS="$CFLAGS -Waddress -Wmissing-noreturn -Wstrict-overflow=1"
  1457. # We used to use -Wstrict-overflow=5, but that breaks us heavily under 4.3.
  1458. fi
  1459. if test "x$have_gcc42" = "xyes" && test "x$have_clang" = "xno"; then
  1460. # These warnings break gcc 4.0.2 and clang, but work on gcc 4.2
  1461. CFLAGS="$CFLAGS -Wnormalized=id -Woverride-init"
  1462. fi
  1463. if test "x$have_gcc43" = "xyes"; then
  1464. # These warnings break gcc 4.2 and work on gcc 4.3
  1465. # XXXX020 See if any of these work with earlier versions.
  1466. CFLAGS="$CFLAGS -Wextra -Warray-bounds"
  1467. fi
  1468. if test "x$have_gcc46" = "xyes"; then
  1469. # This warning was added in gcc 4.3, but it appears to generate
  1470. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1471. CFLAGS="$CFLAGS -Wlogical-op"
  1472. fi
  1473. if test "x$have_shorten64_flag" = "xyes"; then
  1474. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1475. fi
  1476. ##This will break the world on some 64-bit architectures
  1477. # CFLAGS="$CFLAGS -Winline"
  1478. fi
  1479. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1480. case "$host_os" in
  1481. darwin*)
  1482. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-profiling.])
  1483. esac
  1484. fi
  1485. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1486. AC_CONFIG_FILES([
  1487. Doxyfile
  1488. Makefile
  1489. contrib/dist/suse/tor.sh
  1490. contrib/operator-tools/tor.logrotate
  1491. contrib/dist/tor.sh
  1492. contrib/dist/torctl
  1493. contrib/dist/tor.service
  1494. src/config/torrc.sample
  1495. src/config/torrc.minimal
  1496. scripts/maint/checkOptionDocs.pl
  1497. scripts/maint/updateVersions.pl
  1498. ])
  1499. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1500. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1501. for file in $regular_mans ; do
  1502. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1503. echo "==================================";
  1504. echo;
  1505. echo "Building Tor has failed since manpages cannot be built.";
  1506. echo;
  1507. echo "You need asciidoc installed to be able to build the manpages.";
  1508. echo "To build without manpages, use the --disable-asciidoc argument";
  1509. echo "when calling configure.";
  1510. echo;
  1511. echo "==================================";
  1512. exit 1;
  1513. fi
  1514. done
  1515. fi
  1516. AC_OUTPUT