configure.ac 60 KB

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  1. dnl Copyright (c) 2001-2004, Roger Dingledine
  2. dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
  3. dnl Copyright (c) 2007-2015, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_PREREQ([2.63])
  6. AC_INIT([tor],[0.2.9.12-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_USE_SYSTEM_EXTENSIONS
  16. AC_CANONICAL_HOST
  17. PKG_PROG_PKG_CONFIG
  18. if test -f "/etc/redhat-release"; then
  19. if test -f "/usr/kerberos/include"; then
  20. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  21. fi
  22. fi
  23. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  24. # the += operator on it in src/or/Makefile.am
  25. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  28. AC_ARG_ENABLE(static-openssl,
  29. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  30. AC_ARG_ENABLE(static-libevent,
  31. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  32. AC_ARG_ENABLE(static-zlib,
  33. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  34. AC_ARG_ENABLE(static-tor,
  35. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  36. AC_ARG_ENABLE(unittests,
  37. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  38. AC_ARG_ENABLE(coverage,
  39. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  40. AC_ARG_ENABLE(asserts-in-tests,
  41. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  42. AC_ARG_ENABLE(system-torrc,
  43. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  44. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  45. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  46. fi
  47. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  48. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  49. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  50. if test "$enable_static_tor" = "yes"; then
  51. enable_static_libevent="yes";
  52. enable_static_openssl="yes";
  53. enable_static_zlib="yes";
  54. CFLAGS="$CFLAGS -static"
  55. fi
  56. if test "$enable_system_torrc" = "no"; then
  57. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  58. [Defined if we're not going to look for a torrc in SYSCONF])
  59. fi
  60. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  61. AC_ARG_ENABLE(asciidoc,
  62. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  63. [case "${enableval}" in
  64. "yes") asciidoc=true ;;
  65. "no") asciidoc=false ;;
  66. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  67. esac], [asciidoc=true])
  68. # systemd notify support
  69. AC_ARG_ENABLE(systemd,
  70. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  71. [case "${enableval}" in
  72. "yes") systemd=true ;;
  73. "no") systemd=false ;;
  74. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  75. esac], [systemd=auto])
  76. # systemd support
  77. if test "x$enable_systemd" = "xno"; then
  78. have_systemd=no;
  79. else
  80. PKG_CHECK_MODULES(SYSTEMD,
  81. [libsystemd-daemon],
  82. have_systemd=yes,
  83. have_systemd=no)
  84. if test "x$have_systemd" = "xno"; then
  85. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  86. PKG_CHECK_MODULES(SYSTEMD,
  87. [libsystemd],
  88. have_systemd=yes,
  89. have_systemd=no)
  90. fi
  91. fi
  92. if test "x$have_systemd" = "xyes"; then
  93. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  94. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  95. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  96. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  97. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  98. fi
  99. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  100. AC_SUBST(TOR_SYSTEMD_LIBS)
  101. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  102. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  103. fi
  104. case "$host" in
  105. *-*-solaris* )
  106. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  107. ;;
  108. esac
  109. AC_ARG_ENABLE(gcc-warnings,
  110. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  111. AC_ARG_ENABLE(fatal-warnings,
  112. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  113. AC_ARG_ENABLE(gcc-warnings-advisory,
  114. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  115. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  116. AC_ARG_ENABLE(gcc-hardening,
  117. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  118. AC_ARG_ENABLE(expensive-hardening,
  119. AS_HELP_STRING(--enable-expensive-hardening, [enable more expensive compiler hardening; makes Tor slower]))
  120. dnl Linker hardening options
  121. dnl Currently these options are ELF specific - you can't use this with MacOSX
  122. AC_ARG_ENABLE(linker-hardening,
  123. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  124. AC_ARG_ENABLE(local-appdata,
  125. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  126. if test "$enable_local_appdata" = "yes"; then
  127. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  128. [Defined if we default to host local appdata paths on Windows])
  129. fi
  130. # Tor2web mode flag
  131. AC_ARG_ENABLE(tor2web-mode,
  132. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  133. [if test "x$enableval" = "xyes"; then
  134. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  135. fi])
  136. AC_ARG_ENABLE(tool-name-check,
  137. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  138. AC_ARG_ENABLE(seccomp,
  139. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  140. AC_ARG_ENABLE(libscrypt,
  141. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  142. dnl check for the correct "ar" when cross-compiling
  143. AN_MAKEVAR([AR], [AC_PROG_AR])
  144. AN_PROGRAM([ar], [AC_PROG_AR])
  145. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [ar])])
  146. AC_PROG_AR
  147. dnl Check whether the above macro has settled for a simply named tool even
  148. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  149. dnl because that will find any cc on the system, not only the cross-compiler,
  150. dnl and then verify that a binary built with this compiler runs on the
  151. dnl build system. It will then come to the false conclusion that we're not
  152. dnl cross-compiling.
  153. if test "x$enable_tool_name_check" != "xno"; then
  154. if test "x$ac_tool_warned" = "xyes"; then
  155. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  156. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  157. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  158. fi
  159. fi
  160. AC_PROG_CC
  161. AC_PROG_CPP
  162. AC_PROG_MAKE_SET
  163. AC_PROG_RANLIB
  164. AC_PATH_PROG([PERL], [perl])
  165. dnl autoconf 2.59 appears not to support AC_PROG_SED
  166. AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
  167. dnl check for asciidoc and a2x
  168. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  169. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  170. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  171. AM_CONDITIONAL(USE_FW_HELPER, test "x$natpmp" = "xtrue" || test "x$upnp" = "xtrue")
  172. AM_CONDITIONAL(NAT_PMP, test "x$natpmp" = "xtrue")
  173. AM_CONDITIONAL(MINIUPNPC, test "x$upnp" = "xtrue")
  174. AM_PROG_CC_C_O
  175. AC_PROG_CC_C99
  176. AC_ARG_VAR([PYTHON], [path to Python binary])
  177. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  178. if test "x$PYTHON" = "x"; then
  179. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  180. fi
  181. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  182. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  183. AC_C_FLEXIBLE_ARRAY_MEMBER
  184. ], [
  185. dnl Maybe we've got an old autoconf...
  186. AC_CACHE_CHECK([for flexible array members],
  187. tor_cv_c_flexarray,
  188. [AC_COMPILE_IFELSE(
  189. AC_LANG_PROGRAM([
  190. struct abc { int a; char b[]; };
  191. ], [
  192. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  193. def->b[0] = 33;
  194. ]),
  195. [tor_cv_c_flexarray=yes],
  196. [tor_cv_c_flexarray=no])])
  197. if test "$tor_cv_flexarray" = "yes"; then
  198. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  199. else
  200. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  201. fi
  202. ])
  203. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  204. tor_cv_c_c99_decl,
  205. [AC_COMPILE_IFELSE(
  206. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  207. [tor_cv_c_c99_decl=yes],
  208. [tor_cv_c_c99_decl=no] )])
  209. if test "$tor_cv_c_c99_decl" != "yes"; then
  210. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  211. fi
  212. AC_CACHE_CHECK([for working C99 designated initializers],
  213. tor_cv_c_c99_designated_init,
  214. [AC_COMPILE_IFELSE(
  215. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  216. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  217. [tor_cv_c_c99_designated_init=yes],
  218. [tor_cv_c_c99_designated_init=no] )])
  219. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  220. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  221. fi
  222. TORUSER=_tor
  223. AC_ARG_WITH(tor-user,
  224. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  225. [
  226. TORUSER=$withval
  227. ]
  228. )
  229. AC_SUBST(TORUSER)
  230. TORGROUP=_tor
  231. AC_ARG_WITH(tor-group,
  232. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  233. [
  234. TORGROUP=$withval
  235. ]
  236. )
  237. AC_SUBST(TORGROUP)
  238. dnl If _WIN32 is defined and non-zero, we are building for win32
  239. AC_MSG_CHECKING([for win32])
  240. AC_RUN_IFELSE([AC_LANG_SOURCE([
  241. int main(int c, char **v) {
  242. #ifdef _WIN32
  243. #if _WIN32
  244. return 0;
  245. #else
  246. return 1;
  247. #endif
  248. #else
  249. return 2;
  250. #endif
  251. }])],
  252. bwin32=true; AC_MSG_RESULT([yes]),
  253. bwin32=false; AC_MSG_RESULT([no]),
  254. bwin32=cross; AC_MSG_RESULT([cross])
  255. )
  256. if test "$bwin32" = "cross"; then
  257. AC_MSG_CHECKING([for win32 (cross)])
  258. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  259. #ifdef _WIN32
  260. int main(int c, char **v) {return 0;}
  261. #else
  262. #error
  263. int main(int c, char **v) {return x(y);}
  264. #endif
  265. ])],
  266. bwin32=true; AC_MSG_RESULT([yes]),
  267. bwin32=false; AC_MSG_RESULT([no]))
  268. fi
  269. AH_BOTTOM([
  270. #ifdef _WIN32
  271. /* Defined to access windows functions and definitions for >=WinXP */
  272. # ifndef WINVER
  273. # define WINVER 0x0501
  274. # endif
  275. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  276. # ifndef _WIN32_WINNT
  277. # define _WIN32_WINNT 0x0501
  278. # endif
  279. /* Defined to avoid including some windows headers as part of Windows.h */
  280. # ifndef WIN32_LEAN_AND_MEAN
  281. # define WIN32_LEAN_AND_MEAN 1
  282. # endif
  283. #endif
  284. ])
  285. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  286. dnl Enable C99 when compiling with MIPSpro
  287. AC_MSG_CHECKING([for MIPSpro compiler])
  288. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  289. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  290. #error
  291. return x(y);
  292. #endif
  293. ])],
  294. bmipspro=false; AC_MSG_RESULT(no),
  295. bmipspro=true; AC_MSG_RESULT(yes))
  296. if test "$bmipspro" = "true"; then
  297. CFLAGS="$CFLAGS -c99"
  298. fi
  299. AC_C_BIGENDIAN
  300. AC_SEARCH_LIBS(socket, [socket network])
  301. AC_SEARCH_LIBS(gethostbyname, [nsl])
  302. AC_SEARCH_LIBS(dlopen, [dl])
  303. AC_SEARCH_LIBS(inet_aton, [resolv])
  304. AC_SEARCH_LIBS(backtrace, [execinfo])
  305. saved_LIBS="$LIBS"
  306. AC_SEARCH_LIBS([clock_gettime], [rt])
  307. if test "$LIBS" != "$saved_LIBS"; then
  308. # Looks like we need -lrt for clock_gettime().
  309. have_rt=yes
  310. fi
  311. AC_SEARCH_LIBS(pthread_create, [pthread])
  312. AC_SEARCH_LIBS(pthread_detach, [pthread])
  313. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  314. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  315. AC_CHECK_FUNCS(
  316. _NSGetEnviron \
  317. RtlSecureZeroMemory \
  318. SecureZeroMemory \
  319. accept4 \
  320. backtrace \
  321. backtrace_symbols_fd \
  322. eventfd \
  323. explicit_bzero \
  324. timingsafe_memcmp \
  325. flock \
  326. ftime \
  327. getaddrinfo \
  328. getifaddrs \
  329. getpass \
  330. getrlimit \
  331. gettimeofday \
  332. gmtime_r \
  333. htonll \
  334. inet_aton \
  335. ioctl \
  336. issetugid \
  337. llround \
  338. localtime_r \
  339. lround \
  340. memmem \
  341. memset_s \
  342. pipe \
  343. pipe2 \
  344. prctl \
  345. readpassphrase \
  346. rint \
  347. sigaction \
  348. socketpair \
  349. statvfs \
  350. strlcat \
  351. strlcpy \
  352. strnlen \
  353. strptime \
  354. strtok_r \
  355. strtoull \
  356. sysconf \
  357. sysctl \
  358. truncate \
  359. uname \
  360. usleep \
  361. vasprintf \
  362. _vscprintf
  363. )
  364. # Apple messed up when they added two functions functions in Sierra: they
  365. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  366. # checks. So we should only probe for those functions if we are sure that we
  367. # are not targetting OSX 10.11 or earlier.
  368. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  369. AC_TRY_COMPILE([
  370. #ifdef __APPLE__
  371. # include <AvailabilityMacros.h>
  372. # ifndef MAC_OS_X_VERSION_10_12
  373. # define MAC_OS_X_VERSION_10_12 101200
  374. # endif
  375. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  376. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  377. # error "Running on Mac OSX 10.11 or earlier"
  378. # endif
  379. # endif
  380. #endif
  381. ], [],
  382. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  383. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  384. if test "$on_macos_pre_10_12" = "no"; then
  385. AC_CHECK_FUNCS(
  386. clock_gettime \
  387. getentropy \
  388. )
  389. fi
  390. if test "$bwin32" != "true"; then
  391. AC_CHECK_HEADERS(pthread.h)
  392. AC_CHECK_FUNCS(pthread_create)
  393. AC_CHECK_FUNCS(pthread_condattr_setclock)
  394. fi
  395. if test "$bwin32" = "true"; then
  396. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  397. #include <windows.h>
  398. #include <conio.h>
  399. #include <wchar.h>
  400. ])
  401. fi
  402. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  403. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  404. dnl ------------------------------------------------------
  405. dnl Where do you live, libevent? And how do we call you?
  406. if test "$bwin32" = "true"; then
  407. TOR_LIB_WS32=-lws2_32
  408. TOR_LIB_IPHLPAPI=-liphlpapi
  409. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  410. # think it's actually necessary.
  411. TOR_LIB_GDI=-lgdi32
  412. else
  413. TOR_LIB_WS32=
  414. TOR_LIB_GDI=
  415. fi
  416. AC_SUBST(TOR_LIB_WS32)
  417. AC_SUBST(TOR_LIB_GDI)
  418. AC_SUBST(TOR_LIB_IPHLPAPI)
  419. tor_libevent_pkg_redhat="libevent"
  420. tor_libevent_pkg_debian="libevent-dev"
  421. tor_libevent_devpkg_redhat="libevent-devel"
  422. tor_libevent_devpkg_debian="libevent-dev"
  423. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  424. dnl linking for static builds.
  425. STATIC_LIBEVENT_FLAGS=""
  426. if test "$enable_static_libevent" = "yes"; then
  427. if test "$have_rt" = "yes"; then
  428. STATIC_LIBEVENT_FLAGS=" -lrt "
  429. fi
  430. fi
  431. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  432. #ifdef _WIN32
  433. #include <winsock2.h>
  434. #endif
  435. #include <sys/time.h>
  436. #include <sys/types.h>
  437. #include <event2/event.h>], [
  438. #ifdef _WIN32
  439. #include <winsock2.h>
  440. #endif
  441. struct event_base;
  442. struct event_base *event_base_new(void);],
  443. [
  444. #ifdef _WIN32
  445. {WSADATA d; WSAStartup(0x101,&d); }
  446. #endif
  447. event_base_new();
  448. ], [--with-libevent-dir], [/opt/libevent])
  449. dnl Determine the incantation needed to link libevent.
  450. save_LIBS="$LIBS"
  451. save_LDFLAGS="$LDFLAGS"
  452. save_CPPFLAGS="$CPPFLAGS"
  453. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  454. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  455. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  456. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  457. if test "$enable_static_libevent" = "yes"; then
  458. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  459. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  460. else
  461. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  462. fi
  463. else
  464. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  465. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  466. 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"))
  467. if test "$ac_cv_search_event_new" != "none required"; then
  468. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  469. fi
  470. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  471. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  472. fi
  473. else
  474. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  475. fi
  476. fi
  477. dnl Now check for particular libevent functions.
  478. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  479. evutil_secure_rng_add_bytes \
  480. ])
  481. LIBS="$save_LIBS"
  482. LDFLAGS="$save_LDFLAGS"
  483. CPPFLAGS="$save_CPPFLAGS"
  484. dnl Check that libevent is at least at version 2.0.10, the first stable
  485. dnl release of its series
  486. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  487. AC_MSG_CHECKING([whether Libevent is new enough])
  488. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  489. #include <event2/event.h>
  490. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  491. #error
  492. int x = y(zz);
  493. #else
  494. int x = 1;
  495. #endif
  496. ])], [ AC_MSG_RESULT([yes]) ],
  497. [ AC_MSG_RESULT([no])
  498. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  499. LIBS="$save_LIBS"
  500. LDFLAGS="$save_LDFLAGS"
  501. CPPFLAGS="$save_CPPFLAGS"
  502. AC_SUBST(TOR_LIBEVENT_LIBS)
  503. dnl ------------------------------------------------------
  504. dnl Where do you live, libm?
  505. dnl On some platforms (Haiku/BeOS) the math library is
  506. dnl part of libroot. In which case don't link against lm
  507. TOR_LIB_MATH=""
  508. save_LIBS="$LIBS"
  509. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  510. if test "$ac_cv_search_pow" != "none required"; then
  511. TOR_LIB_MATH="$ac_cv_search_pow"
  512. fi
  513. LIBS="$save_LIBS"
  514. AC_SUBST(TOR_LIB_MATH)
  515. dnl ------------------------------------------------------
  516. dnl Where do you live, openssl? And how do we call you?
  517. tor_openssl_pkg_redhat="openssl"
  518. tor_openssl_pkg_debian="libssl-dev"
  519. tor_openssl_devpkg_redhat="openssl-devel"
  520. tor_openssl_devpkg_debian="libssl-dev"
  521. ALT_openssl_WITHVAL=""
  522. AC_ARG_WITH(ssl-dir,
  523. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  524. [
  525. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  526. ALT_openssl_WITHVAL="$withval"
  527. fi
  528. ])
  529. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  530. [#include <openssl/rand.h>],
  531. [void RAND_add(const void *buf, int num, double entropy);],
  532. [RAND_add((void*)0,0,0);], [],
  533. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  534. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  535. if test "$enable_static_openssl" = "yes"; then
  536. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  537. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  538. else
  539. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  540. fi
  541. else
  542. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  543. fi
  544. AC_SUBST(TOR_OPENSSL_LIBS)
  545. dnl Now check for particular openssl functions.
  546. save_LIBS="$LIBS"
  547. save_LDFLAGS="$LDFLAGS"
  548. save_CPPFLAGS="$CPPFLAGS"
  549. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  550. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  551. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  552. AC_TRY_COMPILE([
  553. #include <openssl/opensslv.h>
  554. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  555. #error "too old"
  556. #endif
  557. ], [],
  558. [ : ],
  559. [ AC_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  560. AC_TRY_COMPILE([
  561. #include <openssl/opensslv.h>
  562. #include <openssl/evp.h>
  563. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  564. #error "no ECC"
  565. #endif
  566. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  567. #error "curves unavailable"
  568. #endif
  569. ], [],
  570. [ : ],
  571. [ AC_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  572. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  573. [#include <openssl/ssl.h>
  574. ])
  575. AC_CHECK_FUNCS([ \
  576. SSL_SESSION_get_master_key \
  577. SSL_get_server_random \
  578. SSL_get_client_ciphers \
  579. SSL_get_client_random \
  580. SSL_CIPHER_find \
  581. TLS_method
  582. ])
  583. dnl Check if OpenSSL has scrypt implementation.
  584. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  585. dnl Check if OpenSSL structures are opaque
  586. AC_CHECK_MEMBERS([SSL.state], , ,
  587. [#include <openssl/ssl.h>
  588. ])
  589. LIBS="$save_LIBS"
  590. LDFLAGS="$save_LDFLAGS"
  591. CPPFLAGS="$save_CPPFLAGS"
  592. dnl ------------------------------------------------------
  593. dnl Where do you live, zlib? And how do we call you?
  594. tor_zlib_pkg_redhat="zlib"
  595. tor_zlib_pkg_debian="zlib1g"
  596. tor_zlib_devpkg_redhat="zlib-devel"
  597. tor_zlib_devpkg_debian="zlib1g-dev"
  598. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  599. [#include <zlib.h>],
  600. [const char * zlibVersion(void);],
  601. [zlibVersion();], [--with-zlib-dir],
  602. [/opt/zlib])
  603. if test "$enable_static_zlib" = "yes"; then
  604. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  605. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  606. using --enable-static-zlib")
  607. else
  608. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  609. fi
  610. else
  611. TOR_ZLIB_LIBS="-lz"
  612. fi
  613. AC_SUBST(TOR_ZLIB_LIBS)
  614. dnl ----------------------------------------------------------------------
  615. dnl Check if libcap is available for capabilities.
  616. tor_cap_pkg_debian="libcap2"
  617. tor_cap_pkg_redhat="libcap"
  618. tor_cap_devpkg_debian="libcap-dev"
  619. tor_cap_devpkg_redhat="libcap-devel"
  620. AC_CHECK_LIB([cap], [cap_init], [],
  621. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  622. )
  623. AC_CHECK_FUNCS(cap_set_proc)
  624. dnl ---------------------------------------------------------------------
  625. dnl Now that we know about our major libraries, we can check for compiler
  626. dnl and linker hardening options. We need to do this with the libraries known,
  627. dnl since sometimes the linker will like an option but not be willing to
  628. dnl use it with a build of a library.
  629. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  630. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  631. CFLAGS_FTRAPV=
  632. CFLAGS_FWRAPV=
  633. CFLAGS_ASAN=
  634. CFLAGS_UBSAN=
  635. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  636. #if !defined(__clang__)
  637. #error
  638. #endif])], have_clang=yes, have_clang=no)
  639. if test "x$enable_gcc_hardening" != "xno"; then
  640. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  641. if test "x$have_clang" = "xyes"; then
  642. TOR_CHECK_CFLAGS(-Qunused-arguments)
  643. fi
  644. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  645. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  646. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  647. m4_ifdef([AS_VAR_IF],[
  648. AS_VAR_IF(can_compile, [yes],
  649. AS_VAR_IF(can_link, [yes],
  650. [],
  651. 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.)]))
  652. )])
  653. AS_VAR_POPDEF([can_link])
  654. AS_VAR_POPDEF([can_compile])
  655. TOR_CHECK_CFLAGS(-Wstack-protector)
  656. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  657. if test "$bwin32" = "false"; then
  658. TOR_CHECK_CFLAGS(-fPIE)
  659. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  660. fi
  661. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  662. fi
  663. if test "x$enable_expensive_hardening" = "xyes"; then
  664. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  665. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  666. AC_MSG_WARN([The compiler supports -ftrapv, but for some reason I was not able to link with -ftrapv. Are you missing run-time support? Run-time hardening will not work as well as it should.])
  667. fi
  668. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  669. AC_MSG_ERROR([You requested expensive hardening, but the compiler does not seem to support -ftrapv.])
  670. fi
  671. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  672. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  673. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  674. fi
  675. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  676. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  677. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  678. fi
  679. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  680. fi
  681. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  682. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  683. mulodi_fixes_ftrapv=no
  684. if test "$have_clang" = "yes"; then
  685. saved_CFLAGS="$CFLAGS"
  686. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  687. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  688. AC_LINK_IFELSE([
  689. AC_LANG_SOURCE([[
  690. #include <stdint.h>
  691. #include <stdlib.h>
  692. int main(int argc, char **argv)
  693. {
  694. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  695. * (int64_t)atoi(argv[3]);
  696. return x == 9;
  697. } ]])],
  698. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  699. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  700. if test "$ftrapv_can_link" = "no"; then
  701. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  702. AC_LINK_IFELSE([
  703. AC_LANG_SOURCE([[
  704. #include <stdint.h>
  705. #include <stdlib.h>
  706. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  707. *overflow=0;
  708. return a;
  709. }
  710. int main(int argc, char **argv)
  711. {
  712. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  713. * (int64_t)atoi(argv[3]);
  714. return x == 9;
  715. } ]])],
  716. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  717. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  718. fi
  719. CFLAGS="$saved_CFLAGS"
  720. fi
  721. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  722. dnl These cflags add bunches of branches, and we haven't been able to
  723. dnl persuade ourselves that they're suitable for code that needs to be
  724. dnl constant time.
  725. AC_SUBST(CFLAGS_BUGTRAP)
  726. dnl These cflags are variant ones sutable for code that needs to be
  727. dnl constant-time.
  728. AC_SUBST(CFLAGS_CONSTTIME)
  729. if test "x$enable_linker_hardening" != "xno"; then
  730. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  731. fi
  732. # For backtrace support
  733. TOR_CHECK_LDFLAGS(-rdynamic)
  734. dnl ------------------------------------------------------
  735. dnl Now see if we have a -fomit-frame-pointer compiler option.
  736. saved_CFLAGS="$CFLAGS"
  737. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  738. F_OMIT_FRAME_POINTER=''
  739. if test "$saved_CFLAGS" != "$CFLAGS"; then
  740. if test "x$enable_expensive_hardening" != "xyes"; then
  741. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  742. fi
  743. fi
  744. CFLAGS="$saved_CFLAGS"
  745. AC_SUBST(F_OMIT_FRAME_POINTER)
  746. dnl ------------------------------------------------------
  747. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  748. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  749. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  750. dnl code will work.
  751. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  752. dnl ============================================================
  753. dnl Check for libseccomp
  754. if test "x$enable_seccomp" != "xno"; then
  755. AC_CHECK_HEADERS([seccomp.h])
  756. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  757. fi
  758. dnl ============================================================
  759. dnl Check for libscrypt
  760. if test "x$enable_libscrypt" != "xno"; then
  761. AC_CHECK_HEADERS([libscrypt.h])
  762. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  763. AC_CHECK_FUNCS([libscrypt_scrypt])
  764. fi
  765. dnl ============================================================
  766. dnl We need an implementation of curve25519.
  767. dnl set these defaults.
  768. build_curve25519_donna=no
  769. build_curve25519_donna_c64=no
  770. use_curve25519_donna=no
  771. use_curve25519_nacl=no
  772. CURVE25519_LIBS=
  773. dnl The best choice is using curve25519-donna-c64, but that requires
  774. dnl that we
  775. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  776. tor_cv_can_use_curve25519_donna_c64,
  777. [AC_RUN_IFELSE(
  778. [AC_LANG_PROGRAM([dnl
  779. #include <stdint.h>
  780. typedef unsigned uint128_t __attribute__((mode(TI)));
  781. int func(uint64_t a, uint64_t b) {
  782. uint128_t c = ((uint128_t)a) * b;
  783. int ok = ((uint64_t)(c>>96)) == 522859 &&
  784. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  785. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  786. (((uint64_t)(c))&0xffffffffL) == 0;
  787. return ok;
  788. }
  789. ], [dnl
  790. int ok = func( ((uint64_t)2000000000) * 1000000000,
  791. ((uint64_t)1234567890) << 24);
  792. return !ok;
  793. ])],
  794. [tor_cv_can_use_curve25519_donna_c64=yes],
  795. [tor_cv_can_use_curve25519_donna_c64=no],
  796. [AC_LINK_IFELSE(
  797. [AC_LANG_PROGRAM([dnl
  798. #include <stdint.h>
  799. typedef unsigned uint128_t __attribute__((mode(TI)));
  800. int func(uint64_t a, uint64_t b) {
  801. uint128_t c = ((uint128_t)a) * b;
  802. int ok = ((uint64_t)(c>>96)) == 522859 &&
  803. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  804. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  805. (((uint64_t)(c))&0xffffffffL) == 0;
  806. return ok;
  807. }
  808. ], [dnl
  809. int ok = func( ((uint64_t)2000000000) * 1000000000,
  810. ((uint64_t)1234567890) << 24);
  811. return !ok;
  812. ])],
  813. [tor_cv_can_use_curve25519_donna_c64=cross],
  814. [tor_cv_can_use_curve25519_donna_c64=no])])])
  815. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  816. nacl/crypto_scalarmult_curve25519.h])
  817. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  818. tor_cv_can_use_curve25519_nacl,
  819. [tor_saved_LIBS="$LIBS"
  820. LIBS="$LIBS -lnacl"
  821. AC_LINK_IFELSE(
  822. [AC_LANG_PROGRAM([dnl
  823. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  824. #include <crypto_scalarmult_curve25519.h>
  825. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  826. #include <nacl/crypto_scalarmult_curve25519.h>
  827. #endif
  828. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  829. #error Hey, this is the reference implementation! That's not fast.
  830. #endif
  831. ], [
  832. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  833. ])], [tor_cv_can_use_curve25519_nacl=yes],
  834. [tor_cv_can_use_curve25519_nacl=no])
  835. LIBS="$tor_saved_LIBS" ])
  836. dnl Okay, now we need to figure out which one to actually use. Fall back
  837. dnl to curve25519-donna.c
  838. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  839. build_curve25519_donna_c64=yes
  840. use_curve25519_donna=yes
  841. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  842. use_curve25519_nacl=yes
  843. CURVE25519_LIBS=-lnacl
  844. else
  845. build_curve25519_donna=yes
  846. use_curve25519_donna=yes
  847. fi
  848. if test "x$use_curve25519_donna" = "xyes"; then
  849. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  850. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  851. fi
  852. if test "x$use_curve25519_nacl" = "xyes"; then
  853. AC_DEFINE(USE_CURVE25519_NACL, 1,
  854. [Defined if we should use a curve25519 from nacl])
  855. fi
  856. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  857. test "x$build_curve25519_donna" = "xyes")
  858. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  859. test "x$build_curve25519_donna_c64" = "xyes")
  860. AC_SUBST(CURVE25519_LIBS)
  861. dnl Make sure to enable support for large off_t if available.
  862. AC_SYS_LARGEFILE
  863. AC_CHECK_HEADERS([assert.h \
  864. errno.h \
  865. fcntl.h \
  866. signal.h \
  867. string.h \
  868. sys/capability.h \
  869. sys/fcntl.h \
  870. sys/stat.h \
  871. sys/time.h \
  872. sys/types.h \
  873. time.h \
  874. unistd.h \
  875. arpa/inet.h \
  876. crt_externs.h \
  877. execinfo.h \
  878. grp.h \
  879. ifaddrs.h \
  880. inttypes.h \
  881. limits.h \
  882. linux/types.h \
  883. machine/limits.h \
  884. malloc.h \
  885. malloc/malloc.h \
  886. malloc_np.h \
  887. netdb.h \
  888. netinet/in.h \
  889. netinet/in6.h \
  890. pwd.h \
  891. readpassphrase.h \
  892. stdint.h \
  893. sys/eventfd.h \
  894. sys/file.h \
  895. sys/ioctl.h \
  896. sys/limits.h \
  897. sys/mman.h \
  898. sys/param.h \
  899. sys/prctl.h \
  900. sys/random.h \
  901. sys/resource.h \
  902. sys/select.h \
  903. sys/socket.h \
  904. sys/statvfs.h \
  905. sys/syscall.h \
  906. sys/sysctl.h \
  907. sys/syslimits.h \
  908. sys/time.h \
  909. sys/types.h \
  910. sys/un.h \
  911. sys/utime.h \
  912. sys/wait.h \
  913. syslog.h \
  914. utime.h])
  915. AC_CHECK_HEADERS(sys/param.h)
  916. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  917. [#ifdef HAVE_SYS_TYPES_H
  918. #include <sys/types.h>
  919. #endif
  920. #ifdef HAVE_SYS_SOCKET_H
  921. #include <sys/socket.h>
  922. #endif])
  923. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=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_NET_IF_H
  931. #include <net/if.h>
  932. #endif
  933. #ifdef HAVE_NETINET_IN_H
  934. #include <netinet/in.h>
  935. #endif])
  936. AC_CHECK_HEADERS(linux/if.h,[],[],
  937. [
  938. #ifdef HAVE_SYS_SOCKET_H
  939. #include <sys/socket.h>
  940. #endif
  941. ])
  942. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  943. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  944. [#ifdef HAVE_SYS_TYPES_H
  945. #include <sys/types.h>
  946. #endif
  947. #ifdef HAVE_SYS_SOCKET_H
  948. #include <sys/socket.h>
  949. #endif
  950. #ifdef HAVE_LIMITS_H
  951. #include <limits.h>
  952. #endif
  953. #ifdef HAVE_LINUX_TYPES_H
  954. #include <linux/types.h>
  955. #endif
  956. #ifdef HAVE_NETINET_IN6_H
  957. #include <netinet/in6.h>
  958. #endif
  959. #ifdef HAVE_NETINET_IN_H
  960. #include <netinet/in.h>
  961. #endif])
  962. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  963. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  964. [#ifdef HAVE_SYS_TYPES_H
  965. #include <sys/types.h>
  966. #endif
  967. #ifdef HAVE_SYS_SOCKET_H
  968. #include <sys/socket.h>
  969. #endif
  970. #ifdef HAVE_LIMITS_H
  971. #include <limits.h>
  972. #endif
  973. #ifdef HAVE_LINUX_TYPES_H
  974. #include <linux/types.h>
  975. #endif
  976. #ifdef HAVE_NETINET_IN6_H
  977. #include <netinet/in6.h>
  978. #endif
  979. #ifdef HAVE_NETINET_IN_H
  980. #include <netinet/in.h>
  981. #endif
  982. #ifdef HAVE_LINUX_IF_H
  983. #include <linux/if.h>
  984. #endif])
  985. transparent_ok=0
  986. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  987. transparent_ok=1
  988. fi
  989. if test "x$linux_netfilter_ipv4" = "x1"; then
  990. transparent_ok=1
  991. fi
  992. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  993. transparent_ok=1
  994. fi
  995. if test "x$transparent_ok" = "x1"; then
  996. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  997. case "$host" in
  998. *-*-openbsd* | *-*-bitrig*)
  999. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  1000. esac
  1001. else
  1002. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1003. fi
  1004. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1005. [#ifdef HAVE_SYS_TYPES_H
  1006. #include <sys/types.h>
  1007. #endif
  1008. #ifdef HAVE_SYS_TIME_H
  1009. #include <sys/time.h>
  1010. #endif])
  1011. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1012. dnl Watch out.
  1013. AC_CHECK_SIZEOF(int8_t)
  1014. AC_CHECK_SIZEOF(int16_t)
  1015. AC_CHECK_SIZEOF(int32_t)
  1016. AC_CHECK_SIZEOF(int64_t)
  1017. AC_CHECK_SIZEOF(uint8_t)
  1018. AC_CHECK_SIZEOF(uint16_t)
  1019. AC_CHECK_SIZEOF(uint32_t)
  1020. AC_CHECK_SIZEOF(uint64_t)
  1021. AC_CHECK_SIZEOF(intptr_t)
  1022. AC_CHECK_SIZEOF(uintptr_t)
  1023. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1024. AC_CHECK_SIZEOF(char)
  1025. AC_CHECK_SIZEOF(short)
  1026. AC_CHECK_SIZEOF(int)
  1027. AC_CHECK_SIZEOF(long)
  1028. AC_CHECK_SIZEOF(long long)
  1029. AC_CHECK_SIZEOF(__int64)
  1030. AC_CHECK_SIZEOF(void *)
  1031. AC_CHECK_SIZEOF(time_t)
  1032. AC_CHECK_SIZEOF(size_t)
  1033. AC_CHECK_SIZEOF(pid_t)
  1034. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1035. AC_PC_FROM_UCONTEXT([:])
  1036. dnl used to include sockaddr_storage, but everybody has that.
  1037. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1038. [#ifdef HAVE_SYS_TYPES_H
  1039. #include <sys/types.h>
  1040. #endif
  1041. #ifdef HAVE_NETINET_IN_H
  1042. #include <netinet/in.h>
  1043. #endif
  1044. #ifdef HAVE_NETINET_IN6_H
  1045. #include <netinet/in6.h>
  1046. #endif
  1047. #ifdef HAVE_SYS_SOCKET_H
  1048. #include <sys/socket.h>
  1049. #endif
  1050. #ifdef _WIN32
  1051. #define _WIN32_WINNT 0x0501
  1052. #define WIN32_LEAN_AND_MEAN
  1053. #include <winsock2.h>
  1054. #include <ws2tcpip.h>
  1055. #endif
  1056. ])
  1057. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1058. [#ifdef HAVE_SYS_TYPES_H
  1059. #include <sys/types.h>
  1060. #endif
  1061. #ifdef HAVE_NETINET_IN_H
  1062. #include <netinet/in.h>
  1063. #endif
  1064. #ifdef HAVE_NETINET_IN6_H
  1065. #include <netinet/in6.h>
  1066. #endif
  1067. #ifdef HAVE_SYS_SOCKET_H
  1068. #include <sys/socket.h>
  1069. #endif
  1070. #ifdef _WIN32
  1071. #define _WIN32_WINNT 0x0501
  1072. #define WIN32_LEAN_AND_MEAN
  1073. #include <winsock2.h>
  1074. #include <ws2tcpip.h>
  1075. #endif
  1076. ])
  1077. AC_CHECK_TYPES([rlim_t], , ,
  1078. [#ifdef HAVE_SYS_TYPES_H
  1079. #include <sys/types.h>
  1080. #endif
  1081. #ifdef HAVE_SYS_TIME_H
  1082. #include <sys/time.h>
  1083. #endif
  1084. #ifdef HAVE_SYS_RESOURCE_H
  1085. #include <sys/resource.h>
  1086. #endif
  1087. ])
  1088. AX_CHECK_SIGN([time_t],
  1089. [ : ],
  1090. [ : ], [
  1091. #ifdef HAVE_SYS_TYPES_H
  1092. #include <sys/types.h>
  1093. #endif
  1094. #ifdef HAVE_SYS_TIME_H
  1095. #include <sys/time.h>
  1096. #endif
  1097. #ifdef HAVE_TIME_H
  1098. #include <time.h>
  1099. #endif
  1100. ])
  1101. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1102. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1103. fi
  1104. AX_CHECK_SIGN([size_t],
  1105. [ tor_cv_size_t_signed=yes ],
  1106. [ tor_cv_size_t_signed=no ], [
  1107. #ifdef HAVE_SYS_TYPES_H
  1108. #include <sys/types.h>
  1109. #endif
  1110. ])
  1111. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1112. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1113. fi
  1114. AX_CHECK_SIGN([enum always],
  1115. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1116. [ : ], [
  1117. enum always { AAA, BBB, CCC };
  1118. ])
  1119. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1120. #ifdef HAVE_SYS_SOCKET_H
  1121. #include <sys/socket.h>
  1122. #endif
  1123. ])
  1124. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1125. AC_CHECK_SIZEOF(cell_t)
  1126. # Now make sure that NULL can be represented as zero bytes.
  1127. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1128. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1129. [[#include <stdlib.h>
  1130. #include <string.h>
  1131. #include <stdio.h>
  1132. #ifdef HAVE_STDDEF_H
  1133. #include <stddef.h>
  1134. #endif
  1135. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1136. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1137. [tor_cv_null_is_zero=yes],
  1138. [tor_cv_null_is_zero=no],
  1139. [tor_cv_null_is_zero=cross])])
  1140. if test "$tor_cv_null_is_zero" = "cross"; then
  1141. # Cross-compiling; let's hope that the target isn't raving mad.
  1142. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1143. fi
  1144. if test "$tor_cv_null_is_zero" != "no"; then
  1145. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1146. [Define to 1 iff memset(0) sets pointers to NULL])
  1147. fi
  1148. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1149. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1150. [[#include <stdlib.h>
  1151. #include <string.h>
  1152. #include <stdio.h>
  1153. #ifdef HAVE_STDDEF_H
  1154. #include <stddef.h>
  1155. #endif
  1156. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1157. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1158. [tor_cv_dbl0_is_zero=yes],
  1159. [tor_cv_dbl0_is_zero=no],
  1160. [tor_cv_dbl0_is_zero=cross])])
  1161. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1162. # Cross-compiling; let's hope that the target isn't raving mad.
  1163. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1164. fi
  1165. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1166. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1167. [Define to 1 iff memset(0) sets doubles to 0.0])
  1168. fi
  1169. # And what happens when we malloc zero?
  1170. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1171. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1172. [[#include <stdlib.h>
  1173. #include <string.h>
  1174. #include <stdio.h>
  1175. #ifdef HAVE_STDDEF_H
  1176. #include <stddef.h>
  1177. #endif
  1178. int main () { return malloc(0)?0:1; }]])],
  1179. [tor_cv_malloc_zero_works=yes],
  1180. [tor_cv_malloc_zero_works=no],
  1181. [tor_cv_malloc_zero_works=cross])])
  1182. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1183. # Cross-compiling; let's hope that the target isn't raving mad.
  1184. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1185. fi
  1186. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1187. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1188. [Define to 1 iff malloc(0) returns a pointer])
  1189. fi
  1190. # whether we seem to be in a 2s-complement world.
  1191. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1192. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1193. [[int main () { int problem = ((-99) != (~99)+1);
  1194. return problem ? 1 : 0; }]])],
  1195. [tor_cv_twos_complement=yes],
  1196. [tor_cv_twos_complement=no],
  1197. [tor_cv_twos_complement=cross])])
  1198. if test "$tor_cv_twos_complement" = "cross"; then
  1199. # Cross-compiling; let's hope that the target isn't raving mad.
  1200. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1201. fi
  1202. if test "$tor_cv_twos_complement" != "no"; then
  1203. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1204. [Define to 1 iff we represent negative integers with
  1205. two's complement])
  1206. fi
  1207. # What does shifting a negative value do?
  1208. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1209. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1210. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1211. [tor_cv_sign_extend=yes],
  1212. [tor_cv_sign_extend=no],
  1213. [tor_cv_sign_extend=cross])])
  1214. if test "$tor_cv_sign_extend" = "cross"; then
  1215. # Cross-compiling; let's hope that the target isn't raving mad.
  1216. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1217. fi
  1218. if test "$tor_cv_sign_extend" != "no"; then
  1219. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1220. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1221. fi
  1222. # Whether we should use the dmalloc memory allocation debugging library.
  1223. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1224. AC_ARG_WITH(dmalloc,
  1225. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1226. [if [[ "$withval" = "yes" ]]; then
  1227. dmalloc=1
  1228. AC_MSG_RESULT(yes)
  1229. else
  1230. dmalloc=1
  1231. AC_MSG_RESULT(no)
  1232. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1233. )
  1234. if [[ $dmalloc -eq 1 ]]; then
  1235. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1236. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1237. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1238. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1239. fi
  1240. AC_ARG_WITH(tcmalloc,
  1241. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1242. [ tcmalloc=yes ], [ tcmalloc=no ])
  1243. if test "x$tcmalloc" = "xyes"; then
  1244. LDFLAGS="-ltcmalloc $LDFLAGS"
  1245. fi
  1246. using_custom_malloc=no
  1247. if test "x$enable_openbsd_malloc" = "xyes"; then
  1248. using_custom_malloc=yes
  1249. fi
  1250. if test "x$tcmalloc" = "xyes"; then
  1251. using_custom_malloc=yes
  1252. fi
  1253. if test "$using_custom_malloc" = "no"; then
  1254. AC_CHECK_FUNCS(mallinfo)
  1255. fi
  1256. # By default, we're going to assume we don't have mlockall()
  1257. # bionic and other platforms have various broken mlockall subsystems.
  1258. # Some systems don't have a working mlockall, some aren't linkable,
  1259. # and some have it but don't declare it.
  1260. AC_CHECK_FUNCS(mlockall)
  1261. AC_CHECK_DECLS([mlockall], , , [
  1262. #ifdef HAVE_SYS_MMAN_H
  1263. #include <sys/mman.h>
  1264. #endif])
  1265. # Allow user to specify an alternate syslog facility
  1266. AC_ARG_WITH(syslog-facility,
  1267. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1268. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1269. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1270. AC_SUBST(LOGFACILITY)
  1271. # Check if we have getresuid and getresgid
  1272. AC_CHECK_FUNCS(getresuid getresgid)
  1273. # Check for gethostbyname_r in all its glorious incompatible versions.
  1274. # (This logic is based on that in Python's configure.in)
  1275. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1276. [Define this if you have any gethostbyname_r()])
  1277. AC_CHECK_FUNC(gethostbyname_r, [
  1278. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1279. OLD_CFLAGS=$CFLAGS
  1280. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1281. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1282. #include <netdb.h>
  1283. ], [[
  1284. char *cp1, *cp2;
  1285. struct hostent *h1, *h2;
  1286. int i1, i2;
  1287. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1288. ]])],[
  1289. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1290. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1291. [Define this if gethostbyname_r takes 6 arguments])
  1292. AC_MSG_RESULT(6)
  1293. ], [
  1294. AC_TRY_COMPILE([
  1295. #include <netdb.h>
  1296. ], [
  1297. char *cp1, *cp2;
  1298. struct hostent *h1;
  1299. int i1, i2;
  1300. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1301. ], [
  1302. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1303. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1304. [Define this if gethostbyname_r takes 5 arguments])
  1305. AC_MSG_RESULT(5)
  1306. ], [
  1307. AC_TRY_COMPILE([
  1308. #include <netdb.h>
  1309. ], [
  1310. char *cp1;
  1311. struct hostent *h1;
  1312. struct hostent_data hd;
  1313. (void) gethostbyname_r(cp1,h1,&hd);
  1314. ], [
  1315. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1316. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1317. [Define this if gethostbyname_r takes 3 arguments])
  1318. AC_MSG_RESULT(3)
  1319. ], [
  1320. AC_MSG_RESULT(0)
  1321. ])
  1322. ])
  1323. ])
  1324. CFLAGS=$OLD_CFLAGS
  1325. ])
  1326. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1327. tor_cv_have_func_macro,
  1328. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1329. #include <stdio.h>
  1330. int main(int c, char **v) { puts(__func__); }])],
  1331. tor_cv_have_func_macro=yes,
  1332. tor_cv_have_func_macro=no))
  1333. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1334. tor_cv_have_FUNC_macro,
  1335. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1336. #include <stdio.h>
  1337. int main(int c, char **v) { puts(__FUNC__); }])],
  1338. tor_cv_have_FUNC_macro=yes,
  1339. tor_cv_have_FUNC_macro=no))
  1340. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1341. tor_cv_have_FUNCTION_macro,
  1342. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1343. #include <stdio.h>
  1344. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1345. tor_cv_have_FUNCTION_macro=yes,
  1346. tor_cv_have_FUNCTION_macro=no))
  1347. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1348. tor_cv_have_environ_declared,
  1349. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1350. #ifdef HAVE_UNISTD_H
  1351. #include <unistd.h>
  1352. #endif
  1353. #include <stdlib.h>
  1354. int main(int c, char **v) { char **t = environ; }])],
  1355. tor_cv_have_environ_declared=yes,
  1356. tor_cv_have_environ_declared=no))
  1357. if test "$tor_cv_have_func_macro" = "yes"; then
  1358. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1359. fi
  1360. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1361. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1362. fi
  1363. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1364. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1365. [Defined if the compiler supports __FUNCTION__])
  1366. fi
  1367. if test "$tor_cv_have_environ_declared" = "yes"; then
  1368. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1369. [Defined if we have extern char **environ already declared])
  1370. fi
  1371. # $prefix stores the value of the --prefix command line option, or
  1372. # NONE if the option wasn't set. In the case that it wasn't set, make
  1373. # it be the default, so that we can use it to expand directories now.
  1374. if test "x$prefix" = "xNONE"; then
  1375. prefix=$ac_default_prefix
  1376. fi
  1377. # and similarly for $exec_prefix
  1378. if test "x$exec_prefix" = "xNONE"; then
  1379. exec_prefix=$prefix
  1380. fi
  1381. if test "x$BUILDDIR" = "x"; then
  1382. BUILDDIR=`pwd`
  1383. fi
  1384. AC_SUBST(BUILDDIR)
  1385. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1386. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1387. if test "x$CONFDIR" = "x"; then
  1388. CONFDIR=`eval echo $sysconfdir/tor`
  1389. fi
  1390. AC_SUBST(CONFDIR)
  1391. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1392. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1393. BINDIR=`eval echo $bindir`
  1394. AC_SUBST(BINDIR)
  1395. LOCALSTATEDIR=`eval echo $localstatedir`
  1396. AC_SUBST(LOCALSTATEDIR)
  1397. if test "$bwin32" = "true"; then
  1398. # Test if the linker supports the --nxcompat and --dynamicbase options
  1399. # for Windows
  1400. save_LDFLAGS="$LDFLAGS"
  1401. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1402. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1403. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1404. [AC_MSG_RESULT([yes])]
  1405. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1406. [AC_MSG_RESULT([no])]
  1407. )
  1408. LDFLAGS="$save_LDFLAGS"
  1409. fi
  1410. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1411. # than autoconf's macros like.
  1412. if test "$GCC" = "yes"; then
  1413. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1414. # accident waiting to happen.
  1415. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1416. else
  1417. # Override optimization level for non-gcc compilers
  1418. CFLAGS="$CFLAGS -O"
  1419. enable_gcc_warnings=no
  1420. enable_gcc_warnings_advisory=no
  1421. fi
  1422. # Warnings implies advisory-warnings and -Werror.
  1423. if test "$enable_gcc_warnings" = "yes"; then
  1424. enable_gcc_warnings_advisory=yes
  1425. enable_fatal_warnings=yes
  1426. fi
  1427. # OS X Lion started deprecating the system openssl. Let's just disable
  1428. # all deprecation warnings on OS X. Also, to potentially make the binary
  1429. # a little smaller, let's enable dead_strip.
  1430. case "$host_os" in
  1431. darwin*)
  1432. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1433. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1434. esac
  1435. # Add some more warnings which we use in development but not in the
  1436. # released versions. (Some relevant gcc versions can't handle these.)
  1437. #
  1438. # Note that we have to do this near the end of the autoconf process, or
  1439. # else we may run into problems when these warnings hit on the testing C
  1440. # programs that autoconf wants to build.
  1441. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1442. case "$host" in
  1443. *-*-openbsd* | *-*-bitrig*)
  1444. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1445. # That's fine, except that the headers don't pass -Wredundant-decls.
  1446. # Therefore, let's disable -Wsystem-headers when we're building
  1447. # with maximal warnings on OpenBSD.
  1448. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1449. esac
  1450. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1451. # have it work better.
  1452. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1453. # This warning was added in gcc 4.3, but it appears to generate
  1454. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1455. #CFLAGS="$CFLAGS -Wlogical-op"
  1456. m4_foreach_w([warning_flag], [
  1457. -Waddress
  1458. -Waddress-of-array-temporary
  1459. -Waddress-of-temporary
  1460. -Wambiguous-macro
  1461. -Wanonymous-pack-parens
  1462. -Warc
  1463. -Warc-abi
  1464. -Warc-bridge-casts-disallowed-in-nonarc
  1465. -Warc-maybe-repeated-use-of-weak
  1466. -Warc-performSelector-leaks
  1467. -Warc-repeated-use-of-weak
  1468. -Warray-bounds
  1469. -Warray-bounds-pointer-arithmetic
  1470. -Wasm
  1471. -Wasm-operand-widths
  1472. -Watomic-properties
  1473. -Watomic-property-with-user-defined-accessor
  1474. -Wauto-import
  1475. -Wauto-storage-class
  1476. -Wauto-var-id
  1477. -Wavailability
  1478. -Wbackslash-newline-escape
  1479. -Wbad-array-new-length
  1480. -Wbind-to-temporary-copy
  1481. -Wbitfield-constant-conversion
  1482. -Wbool-conversion
  1483. -Wbool-conversions
  1484. -Wbuiltin-requires-header
  1485. -Wchar-align
  1486. -Wcompare-distinct-pointer-types
  1487. -Wcomplex-component-init
  1488. -Wconditional-type-mismatch
  1489. -Wconfig-macros
  1490. -Wconstant-conversion
  1491. -Wconstant-logical-operand
  1492. -Wconstexpr-not-const
  1493. -Wcustom-atomic-properties
  1494. -Wdangling-field
  1495. -Wdangling-initializer-list
  1496. -Wdate-time
  1497. -Wdelegating-ctor-cycles
  1498. -Wdeprecated-implementations
  1499. -Wdeprecated-register
  1500. -Wdirect-ivar-access
  1501. -Wdiscard-qual
  1502. -Wdistributed-object-modifiers
  1503. -Wdivision-by-zero
  1504. -Wdollar-in-identifier-extension
  1505. -Wdouble-promotion
  1506. -Wduplicate-decl-specifier
  1507. -Wduplicate-enum
  1508. -Wduplicate-method-arg
  1509. -Wduplicate-method-match
  1510. -Wduplicated-cond
  1511. -Wdynamic-class-memaccess
  1512. -Wembedded-directive
  1513. -Wempty-translation-unit
  1514. -Wenum-conversion
  1515. -Wexit-time-destructors
  1516. -Wexplicit-ownership-type
  1517. -Wextern-initializer
  1518. -Wextra
  1519. -Wextra-semi
  1520. -Wextra-tokens
  1521. -Wflexible-array-extensions
  1522. -Wfloat-conversion
  1523. -Wformat-non-iso
  1524. -Wfour-char-constants
  1525. -Wgcc-compat
  1526. -Wglobal-constructors
  1527. -Wgnu-array-member-paren-init
  1528. -Wgnu-designator
  1529. -Wgnu-static-float-init
  1530. -Wheader-guard
  1531. -Wheader-hygiene
  1532. -Widiomatic-parentheses
  1533. -Wignored-attributes
  1534. -Wimplicit-atomic-properties
  1535. -Wimplicit-conversion-floating-point-to-bool
  1536. -Wimplicit-exception-spec-mismatch
  1537. -Wimplicit-fallthrough
  1538. -Wimplicit-fallthrough-per-function
  1539. -Wimplicit-retain-self
  1540. -Wimport-preprocessor-directive-pedantic
  1541. -Wincompatible-library-redeclaration
  1542. -Wincompatible-pointer-types-discards-qualifiers
  1543. -Wincomplete-implementation
  1544. -Wincomplete-module
  1545. -Wincomplete-umbrella
  1546. -Winit-self
  1547. -Wint-conversions
  1548. -Wint-to-void-pointer-cast
  1549. -Winteger-overflow
  1550. -Winvalid-constexpr
  1551. -Winvalid-iboutlet
  1552. -Winvalid-noreturn
  1553. -Winvalid-pp-token
  1554. -Winvalid-source-encoding
  1555. -Winvalid-token-paste
  1556. -Wknr-promoted-parameter
  1557. -Wlanguage-extension-token
  1558. -Wlarge-by-value-copy
  1559. -Wliteral-conversion
  1560. -Wliteral-range
  1561. -Wlocal-type-template-args
  1562. -Wlogical-op
  1563. -Wloop-analysis
  1564. -Wmain-return-type
  1565. -Wmalformed-warning-check
  1566. -Wmethod-signatures
  1567. -Wmicrosoft
  1568. -Wmicrosoft-exists
  1569. -Wmismatched-parameter-types
  1570. -Wmismatched-return-types
  1571. -Wmissing-field-initializers
  1572. -Wmissing-format-attribute
  1573. -Wmissing-noreturn
  1574. -Wmissing-selector-name
  1575. -Wmissing-sysroot
  1576. -Wmissing-variable-declarations
  1577. -Wmodule-conflict
  1578. -Wnested-anon-types
  1579. -Wnewline-eof
  1580. -Wnon-literal-null-conversion
  1581. -Wnon-pod-varargs
  1582. -Wnonportable-cfstrings
  1583. -Wnormalized=id
  1584. -Wnull-arithmetic
  1585. -Wnull-character
  1586. -Wnull-conversion
  1587. -Wnull-dereference
  1588. -Wout-of-line-declaration
  1589. -Wover-aligned
  1590. -Woverlength-strings
  1591. -Woverride-init
  1592. -Woverriding-method-mismatch
  1593. -Wpointer-type-mismatch
  1594. -Wpredefined-identifier-outside-function
  1595. -Wprotocol-property-synthesis-ambiguity
  1596. -Wreadonly-iboutlet-property
  1597. -Wreadonly-setter-attrs
  1598. -Wreceiver-expr
  1599. -Wreceiver-forward-class
  1600. -Wreceiver-is-weak
  1601. -Wreinterpret-base-class
  1602. -Wrequires-super-attribute
  1603. -Wreserved-user-defined-literal
  1604. -Wreturn-stack-address
  1605. -Wsection
  1606. -Wselector-type-mismatch
  1607. -Wsentinel
  1608. -Wserialized-diagnostics
  1609. -Wshadow
  1610. -Wshift-count-negative
  1611. -Wshift-count-overflow
  1612. -Wshift-negative-value
  1613. -Wshift-overflow=2
  1614. -Wshift-sign-overflow
  1615. -Wshorten-64-to-32
  1616. -Wsizeof-array-argument
  1617. -Wsource-uses-openmp
  1618. -Wstatic-float-init
  1619. -Wstatic-in-inline
  1620. -Wstatic-local-in-inline
  1621. -Wstrict-overflow=1
  1622. -Wstring-compare
  1623. -Wstring-conversion
  1624. -Wstrlcpy-strlcat-size
  1625. -Wstrncat-size
  1626. -Wsuggest-attribute=format
  1627. -Wsuggest-attribute=noreturn
  1628. -Wsuper-class-method-mismatch
  1629. -Wswitch-bool
  1630. -Wsync-nand
  1631. -Wtautological-constant-out-of-range-compare
  1632. -Wtentative-definition-incomplete-type
  1633. -Wtrampolines
  1634. -Wtype-safety
  1635. -Wtypedef-redefinition
  1636. -Wtypename-missing
  1637. -Wundefined-inline
  1638. -Wundefined-internal
  1639. -Wundefined-reinterpret-cast
  1640. -Wunicode
  1641. -Wunicode-whitespace
  1642. -Wunknown-warning-option
  1643. -Wunnamed-type-template-args
  1644. -Wunneeded-member-function
  1645. -Wunsequenced
  1646. -Wunsupported-visibility
  1647. -Wunused-but-set-parameter
  1648. -Wunused-but-set-variable
  1649. -Wunused-command-line-argument
  1650. -Wunused-const-variable=2
  1651. -Wunused-exception-parameter
  1652. -Wunused-local-typedefs
  1653. -Wunused-member-function
  1654. -Wunused-sanitize-argument
  1655. -Wunused-volatile-lvalue
  1656. -Wuser-defined-literals
  1657. -Wvariadic-macros
  1658. -Wvector-conversion
  1659. -Wvector-conversions
  1660. -Wvexing-parse
  1661. -Wvisibility
  1662. -Wvla-extension
  1663. -Wzero-length-array
  1664. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1665. dnl We should re-enable this in some later version. Clang doesn't
  1666. dnl mind, but it causes trouble with GCC.
  1667. dnl -Wstrict-overflow=2
  1668. dnl These seem to require annotations that we don't currently use,
  1669. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1670. dnl -Wthread-safety
  1671. dnl -Wthread-safety-analysis
  1672. dnl -Wthread-safety-attributes
  1673. dnl -Wthread-safety-beta
  1674. dnl -Wthread-safety-precise
  1675. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1676. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1677. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1678. CFLAGS="$CFLAGS -Wwrite-strings"
  1679. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1680. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1681. CFLAGS="$CFLAGS -Wunused-parameter "
  1682. # These interfere with building main() { return 0; }, which autoconf
  1683. # likes to use as its default program.
  1684. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1685. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1686. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1687. fi
  1688. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1689. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1690. fi
  1691. if test "x$enable_fatal_warnings" = "xyes"; then
  1692. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1693. # default autoconf programs are full of errors.
  1694. CFLAGS="$CFLAGS -Werror"
  1695. fi
  1696. fi
  1697. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1698. case "$host_os" in
  1699. darwin*)
  1700. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1701. esac
  1702. fi
  1703. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1704. AC_CONFIG_FILES([
  1705. Doxyfile
  1706. Makefile
  1707. contrib/dist/suse/tor.sh
  1708. contrib/operator-tools/tor.logrotate
  1709. contrib/dist/tor.sh
  1710. contrib/dist/torctl
  1711. contrib/dist/tor.service
  1712. src/config/torrc.sample
  1713. src/config/torrc.minimal
  1714. scripts/maint/checkOptionDocs.pl
  1715. scripts/maint/updateVersions.pl
  1716. ])
  1717. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1718. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1719. for file in $regular_mans ; do
  1720. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1721. echo "==================================";
  1722. echo;
  1723. echo "Building Tor has failed since manpages cannot be built.";
  1724. echo;
  1725. echo "You need asciidoc installed to be able to build the manpages.";
  1726. echo "To build without manpages, use the --disable-asciidoc argument";
  1727. echo "when calling configure.";
  1728. echo;
  1729. echo "==================================";
  1730. exit 1;
  1731. fi
  1732. done
  1733. fi
  1734. AC_OUTPUT