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],[0.2.9.17-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$upnp" = "xtrue")
  174. AM_PROG_CC_C_O
  175. AC_PROG_CC_C99
  176. AC_ARG_VAR([PYTHON], [path to Python binary])
  177. AC_CHECK_PROGS(PYTHON, [ \
  178. python3 \
  179. python3.8 python3.7 python3.6 python3.5 python3.4 \
  180. python \
  181. python2 python2.7])
  182. if test "x$PYTHON" = "x"; then
  183. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  184. fi
  185. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  186. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  187. AC_C_FLEXIBLE_ARRAY_MEMBER
  188. ], [
  189. dnl Maybe we've got an old autoconf...
  190. AC_CACHE_CHECK([for flexible array members],
  191. tor_cv_c_flexarray,
  192. [AC_COMPILE_IFELSE(
  193. AC_LANG_PROGRAM([
  194. struct abc { int a; char b[]; };
  195. ], [
  196. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  197. def->b[0] = 33;
  198. ]),
  199. [tor_cv_c_flexarray=yes],
  200. [tor_cv_c_flexarray=no])])
  201. if test "$tor_cv_flexarray" = "yes"; then
  202. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  203. else
  204. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  205. fi
  206. ])
  207. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  208. tor_cv_c_c99_decl,
  209. [AC_COMPILE_IFELSE(
  210. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  211. [tor_cv_c_c99_decl=yes],
  212. [tor_cv_c_c99_decl=no] )])
  213. if test "$tor_cv_c_c99_decl" != "yes"; then
  214. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  215. fi
  216. AC_CACHE_CHECK([for working C99 designated initializers],
  217. tor_cv_c_c99_designated_init,
  218. [AC_COMPILE_IFELSE(
  219. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  220. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  221. [tor_cv_c_c99_designated_init=yes],
  222. [tor_cv_c_c99_designated_init=no] )])
  223. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  224. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  225. fi
  226. TORUSER=_tor
  227. AC_ARG_WITH(tor-user,
  228. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  229. [
  230. TORUSER=$withval
  231. ]
  232. )
  233. AC_SUBST(TORUSER)
  234. TORGROUP=_tor
  235. AC_ARG_WITH(tor-group,
  236. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  237. [
  238. TORGROUP=$withval
  239. ]
  240. )
  241. AC_SUBST(TORGROUP)
  242. dnl If _WIN32 is defined and non-zero, we are building for win32
  243. AC_MSG_CHECKING([for win32])
  244. AC_RUN_IFELSE([AC_LANG_SOURCE([
  245. int main(int c, char **v) {
  246. #ifdef _WIN32
  247. #if _WIN32
  248. return 0;
  249. #else
  250. return 1;
  251. #endif
  252. #else
  253. return 2;
  254. #endif
  255. }])],
  256. bwin32=true; AC_MSG_RESULT([yes]),
  257. bwin32=false; AC_MSG_RESULT([no]),
  258. bwin32=cross; AC_MSG_RESULT([cross])
  259. )
  260. if test "$bwin32" = "cross"; then
  261. AC_MSG_CHECKING([for win32 (cross)])
  262. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  263. #ifdef _WIN32
  264. int main(int c, char **v) {return 0;}
  265. #else
  266. #error
  267. int main(int c, char **v) {return x(y);}
  268. #endif
  269. ])],
  270. bwin32=true; AC_MSG_RESULT([yes]),
  271. bwin32=false; AC_MSG_RESULT([no]))
  272. fi
  273. AH_BOTTOM([
  274. #ifdef _WIN32
  275. /* Defined to access windows functions and definitions for >=WinXP */
  276. # ifndef WINVER
  277. # define WINVER 0x0501
  278. # endif
  279. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  280. # ifndef _WIN32_WINNT
  281. # define _WIN32_WINNT 0x0501
  282. # endif
  283. /* Defined to avoid including some windows headers as part of Windows.h */
  284. # ifndef WIN32_LEAN_AND_MEAN
  285. # define WIN32_LEAN_AND_MEAN 1
  286. # endif
  287. #endif
  288. ])
  289. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  290. dnl Enable C99 when compiling with MIPSpro
  291. AC_MSG_CHECKING([for MIPSpro compiler])
  292. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  293. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  294. #error
  295. return x(y);
  296. #endif
  297. ])],
  298. bmipspro=false; AC_MSG_RESULT(no),
  299. bmipspro=true; AC_MSG_RESULT(yes))
  300. if test "$bmipspro" = "true"; then
  301. CFLAGS="$CFLAGS -c99"
  302. fi
  303. AC_C_BIGENDIAN
  304. AC_SEARCH_LIBS(socket, [socket network])
  305. AC_SEARCH_LIBS(gethostbyname, [nsl])
  306. AC_SEARCH_LIBS(dlopen, [dl])
  307. AC_SEARCH_LIBS(inet_aton, [resolv])
  308. AC_SEARCH_LIBS(backtrace, [execinfo])
  309. saved_LIBS="$LIBS"
  310. AC_SEARCH_LIBS([clock_gettime], [rt])
  311. if test "$LIBS" != "$saved_LIBS"; then
  312. # Looks like we need -lrt for clock_gettime().
  313. have_rt=yes
  314. fi
  315. if test "$bwin32" = "false"; then
  316. AC_SEARCH_LIBS(pthread_create, [pthread])
  317. AC_SEARCH_LIBS(pthread_detach, [pthread])
  318. fi
  319. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  320. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  321. AC_CHECK_FUNCS(
  322. _NSGetEnviron \
  323. RtlSecureZeroMemory \
  324. SecureZeroMemory \
  325. accept4 \
  326. backtrace \
  327. backtrace_symbols_fd \
  328. eventfd \
  329. explicit_bzero \
  330. timingsafe_memcmp \
  331. flock \
  332. ftime \
  333. getaddrinfo \
  334. getifaddrs \
  335. getpass \
  336. getrlimit \
  337. gettimeofday \
  338. gmtime_r \
  339. gnu_get_libc_version \
  340. htonll \
  341. inet_aton \
  342. ioctl \
  343. issetugid \
  344. llround \
  345. localtime_r \
  346. lround \
  347. memmem \
  348. memset_s \
  349. pipe \
  350. pipe2 \
  351. prctl \
  352. readpassphrase \
  353. rint \
  354. sigaction \
  355. socketpair \
  356. statvfs \
  357. strlcat \
  358. strlcpy \
  359. strnlen \
  360. strptime \
  361. strtok_r \
  362. strtoull \
  363. sysconf \
  364. sysctl \
  365. truncate \
  366. uname \
  367. usleep \
  368. vasprintf \
  369. _vscprintf
  370. )
  371. # Apple messed up when they added two functions functions in Sierra: they
  372. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  373. # checks. So we should only probe for those functions if we are sure that we
  374. # are not targetting OSX 10.11 or earlier.
  375. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  376. AC_TRY_COMPILE([
  377. #ifdef __APPLE__
  378. # include <AvailabilityMacros.h>
  379. # ifndef MAC_OS_X_VERSION_10_12
  380. # define MAC_OS_X_VERSION_10_12 101200
  381. # endif
  382. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  383. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  384. # error "Running on Mac OSX 10.11 or earlier"
  385. # endif
  386. # endif
  387. #endif
  388. ], [],
  389. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  390. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  391. if test "$on_macos_pre_10_12" = "no"; then
  392. AC_CHECK_FUNCS(
  393. clock_gettime \
  394. getentropy \
  395. )
  396. fi
  397. if test "$bwin32" != "true"; then
  398. AC_CHECK_HEADERS(pthread.h)
  399. AC_CHECK_FUNCS(pthread_create)
  400. AC_CHECK_FUNCS(pthread_condattr_setclock)
  401. fi
  402. if test "$bwin32" = "true"; then
  403. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  404. #include <windows.h>
  405. #include <conio.h>
  406. #include <wchar.h>
  407. ])
  408. fi
  409. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  410. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  411. dnl ------------------------------------------------------
  412. dnl Where do you live, libevent? And how do we call you?
  413. if test "$bwin32" = "true"; then
  414. TOR_LIB_WS32=-lws2_32
  415. TOR_LIB_IPHLPAPI=-liphlpapi
  416. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  417. # think it's actually necessary.
  418. TOR_LIB_GDI=-lgdi32
  419. else
  420. TOR_LIB_WS32=
  421. TOR_LIB_GDI=
  422. fi
  423. AC_SUBST(TOR_LIB_WS32)
  424. AC_SUBST(TOR_LIB_GDI)
  425. AC_SUBST(TOR_LIB_IPHLPAPI)
  426. tor_libevent_pkg_redhat="libevent"
  427. tor_libevent_pkg_debian="libevent-dev"
  428. tor_libevent_devpkg_redhat="libevent-devel"
  429. tor_libevent_devpkg_debian="libevent-dev"
  430. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  431. dnl linking for static builds.
  432. STATIC_LIBEVENT_FLAGS=""
  433. if test "$enable_static_libevent" = "yes"; then
  434. if test "$have_rt" = "yes"; then
  435. STATIC_LIBEVENT_FLAGS=" -lrt "
  436. fi
  437. fi
  438. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  439. #ifdef _WIN32
  440. #include <winsock2.h>
  441. #endif
  442. #include <sys/time.h>
  443. #include <sys/types.h>
  444. #include <event2/event.h>], [
  445. #ifdef _WIN32
  446. #include <winsock2.h>
  447. #endif
  448. struct event_base;
  449. struct event_base *event_base_new(void);],
  450. [
  451. #ifdef _WIN32
  452. {WSADATA d; WSAStartup(0x101,&d); }
  453. #endif
  454. event_base_new();
  455. ], [--with-libevent-dir], [/opt/libevent])
  456. dnl Determine the incantation needed to link libevent.
  457. save_LIBS="$LIBS"
  458. save_LDFLAGS="$LDFLAGS"
  459. save_CPPFLAGS="$CPPFLAGS"
  460. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  461. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  462. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  463. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  464. if test "$enable_static_libevent" = "yes"; then
  465. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  466. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  467. else
  468. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  469. fi
  470. else
  471. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  472. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  473. 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"))
  474. if test "$ac_cv_search_event_new" != "none required"; then
  475. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  476. fi
  477. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  478. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  479. fi
  480. else
  481. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  482. fi
  483. fi
  484. dnl Now check for particular libevent functions.
  485. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  486. evutil_secure_rng_add_bytes \
  487. ])
  488. LIBS="$save_LIBS"
  489. LDFLAGS="$save_LDFLAGS"
  490. CPPFLAGS="$save_CPPFLAGS"
  491. dnl Check that libevent is at least at version 2.0.10, the first stable
  492. dnl release of its series
  493. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  494. AC_MSG_CHECKING([whether Libevent is new enough])
  495. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  496. #include <event2/event.h>
  497. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  498. #error
  499. int x = y(zz);
  500. #else
  501. int x = 1;
  502. #endif
  503. ])], [ AC_MSG_RESULT([yes]) ],
  504. [ AC_MSG_RESULT([no])
  505. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  506. LIBS="$save_LIBS"
  507. LDFLAGS="$save_LDFLAGS"
  508. CPPFLAGS="$save_CPPFLAGS"
  509. AC_SUBST(TOR_LIBEVENT_LIBS)
  510. dnl ------------------------------------------------------
  511. dnl Where do you live, libm?
  512. dnl On some platforms (Haiku/BeOS) the math library is
  513. dnl part of libroot. In which case don't link against lm
  514. TOR_LIB_MATH=""
  515. save_LIBS="$LIBS"
  516. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  517. if test "$ac_cv_search_pow" != "none required"; then
  518. TOR_LIB_MATH="$ac_cv_search_pow"
  519. fi
  520. LIBS="$save_LIBS"
  521. AC_SUBST(TOR_LIB_MATH)
  522. dnl ------------------------------------------------------
  523. dnl Where do you live, openssl? And how do we call you?
  524. tor_openssl_pkg_redhat="openssl"
  525. tor_openssl_pkg_debian="libssl-dev"
  526. tor_openssl_devpkg_redhat="openssl-devel"
  527. tor_openssl_devpkg_debian="libssl-dev"
  528. ALT_openssl_WITHVAL=""
  529. AC_ARG_WITH(ssl-dir,
  530. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  531. [
  532. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  533. ALT_openssl_WITHVAL="$withval"
  534. fi
  535. ])
  536. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  537. [#include <openssl/rand.h>],
  538. [void RAND_add(const void *buf, int num, double entropy);],
  539. [RAND_add((void*)0,0,0);], [],
  540. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  541. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  542. if test "$enable_static_openssl" = "yes"; then
  543. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  544. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  545. else
  546. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  547. fi
  548. else
  549. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  550. fi
  551. AC_SUBST(TOR_OPENSSL_LIBS)
  552. dnl Now check for particular openssl functions.
  553. save_LIBS="$LIBS"
  554. save_LDFLAGS="$LDFLAGS"
  555. save_CPPFLAGS="$CPPFLAGS"
  556. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  557. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  558. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  559. AC_TRY_COMPILE([
  560. #include <openssl/opensslv.h>
  561. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  562. #error "too old"
  563. #endif
  564. ], [],
  565. [ : ],
  566. [ AC_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  567. AC_TRY_COMPILE([
  568. #include <openssl/opensslv.h>
  569. #include <openssl/evp.h>
  570. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  571. #error "no ECC"
  572. #endif
  573. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  574. #error "curves unavailable"
  575. #endif
  576. ], [],
  577. [ : ],
  578. [ AC_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  579. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  580. [#include <openssl/ssl.h>
  581. ])
  582. AC_CHECK_FUNCS([ \
  583. SSL_SESSION_get_master_key \
  584. SSL_get_server_random \
  585. SSL_get_client_ciphers \
  586. SSL_get_client_random \
  587. SSL_CIPHER_find \
  588. SSL_CTX_set_security_level \
  589. TLS_method
  590. ])
  591. dnl Check if OpenSSL has scrypt implementation.
  592. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  593. dnl Check if OpenSSL structures are opaque
  594. AC_CHECK_MEMBERS([SSL.state], , ,
  595. [#include <openssl/ssl.h>
  596. ])
  597. LIBS="$save_LIBS"
  598. LDFLAGS="$save_LDFLAGS"
  599. CPPFLAGS="$save_CPPFLAGS"
  600. dnl ------------------------------------------------------
  601. dnl Where do you live, zlib? And how do we call you?
  602. tor_zlib_pkg_redhat="zlib"
  603. tor_zlib_pkg_debian="zlib1g"
  604. tor_zlib_devpkg_redhat="zlib-devel"
  605. tor_zlib_devpkg_debian="zlib1g-dev"
  606. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  607. [#include <zlib.h>],
  608. [const char * zlibVersion(void);],
  609. [zlibVersion();], [--with-zlib-dir],
  610. [/opt/zlib])
  611. if test "$enable_static_zlib" = "yes"; then
  612. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  613. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  614. using --enable-static-zlib")
  615. else
  616. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  617. fi
  618. else
  619. TOR_ZLIB_LIBS="-lz"
  620. fi
  621. AC_SUBST(TOR_ZLIB_LIBS)
  622. dnl ----------------------------------------------------------------------
  623. dnl Check if libcap is available for capabilities.
  624. tor_cap_pkg_debian="libcap2"
  625. tor_cap_pkg_redhat="libcap"
  626. tor_cap_devpkg_debian="libcap-dev"
  627. tor_cap_devpkg_redhat="libcap-devel"
  628. AC_CHECK_LIB([cap], [cap_init], [],
  629. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  630. )
  631. AC_CHECK_FUNCS(cap_set_proc)
  632. dnl ---------------------------------------------------------------------
  633. dnl Now that we know about our major libraries, we can check for compiler
  634. dnl and linker hardening options. We need to do this with the libraries known,
  635. dnl since sometimes the linker will like an option but not be willing to
  636. dnl use it with a build of a library.
  637. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  638. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  639. CFLAGS_FTRAPV=
  640. CFLAGS_FWRAPV=
  641. CFLAGS_ASAN=
  642. CFLAGS_UBSAN=
  643. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  644. #if !defined(__clang__)
  645. #error
  646. #endif])], have_clang=yes, have_clang=no)
  647. if test "x$enable_gcc_hardening" != "xno"; then
  648. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  649. if test "x$have_clang" = "xyes"; then
  650. TOR_CHECK_CFLAGS(-Qunused-arguments)
  651. fi
  652. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  653. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  654. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  655. m4_ifdef([AS_VAR_IF],[
  656. AS_VAR_IF(can_compile, [yes],
  657. AS_VAR_IF(can_link, [yes],
  658. [],
  659. 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.)]))
  660. )])
  661. AS_VAR_POPDEF([can_link])
  662. AS_VAR_POPDEF([can_compile])
  663. TOR_CHECK_CFLAGS(-Wstack-protector)
  664. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  665. if test "$bwin32" = "false"; then
  666. TOR_CHECK_CFLAGS(-fPIE)
  667. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  668. fi
  669. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  670. fi
  671. if test "x$enable_expensive_hardening" = "xyes"; then
  672. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  673. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  674. 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.])
  675. fi
  676. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  677. AC_MSG_ERROR([You requested expensive hardening, but the compiler does not seem to support -ftrapv.])
  678. fi
  679. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  680. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  681. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  682. fi
  683. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  684. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  685. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  686. fi
  687. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  688. fi
  689. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  690. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  691. mulodi_fixes_ftrapv=no
  692. if test "$have_clang" = "yes"; then
  693. saved_CFLAGS="$CFLAGS"
  694. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  695. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  696. AC_LINK_IFELSE([
  697. AC_LANG_SOURCE([[
  698. #include <stdint.h>
  699. #include <stdlib.h>
  700. int main(int argc, char **argv)
  701. {
  702. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  703. * (int64_t)atoi(argv[3]);
  704. return x == 9;
  705. } ]])],
  706. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  707. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  708. if test "$ftrapv_can_link" = "no"; then
  709. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  710. AC_LINK_IFELSE([
  711. AC_LANG_SOURCE([[
  712. #include <stdint.h>
  713. #include <stdlib.h>
  714. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  715. *overflow=0;
  716. return a;
  717. }
  718. int main(int argc, char **argv)
  719. {
  720. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  721. * (int64_t)atoi(argv[3]);
  722. return x == 9;
  723. } ]])],
  724. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  725. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  726. fi
  727. CFLAGS="$saved_CFLAGS"
  728. fi
  729. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  730. dnl These cflags add bunches of branches, and we haven't been able to
  731. dnl persuade ourselves that they're suitable for code that needs to be
  732. dnl constant time.
  733. AC_SUBST(CFLAGS_BUGTRAP)
  734. dnl These cflags are variant ones sutable for code that needs to be
  735. dnl constant-time.
  736. AC_SUBST(CFLAGS_CONSTTIME)
  737. if test "x$enable_linker_hardening" != "xno"; then
  738. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  739. fi
  740. # For backtrace support
  741. TOR_CHECK_LDFLAGS(-rdynamic)
  742. dnl ------------------------------------------------------
  743. dnl Now see if we have a -fomit-frame-pointer compiler option.
  744. saved_CFLAGS="$CFLAGS"
  745. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  746. F_OMIT_FRAME_POINTER=''
  747. if test "$saved_CFLAGS" != "$CFLAGS"; then
  748. if test "x$enable_expensive_hardening" != "xyes"; then
  749. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  750. fi
  751. fi
  752. CFLAGS="$saved_CFLAGS"
  753. AC_SUBST(F_OMIT_FRAME_POINTER)
  754. dnl ------------------------------------------------------
  755. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  756. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  757. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  758. dnl code will work.
  759. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  760. dnl ============================================================
  761. dnl Check for libseccomp
  762. if test "x$enable_seccomp" != "xno"; then
  763. AC_CHECK_HEADERS([seccomp.h])
  764. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  765. fi
  766. dnl ============================================================
  767. dnl Check for libscrypt
  768. if test "x$enable_libscrypt" != "xno"; then
  769. AC_CHECK_HEADERS([libscrypt.h])
  770. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  771. AC_CHECK_FUNCS([libscrypt_scrypt])
  772. fi
  773. dnl ============================================================
  774. dnl We need an implementation of curve25519.
  775. dnl set these defaults.
  776. build_curve25519_donna=no
  777. build_curve25519_donna_c64=no
  778. use_curve25519_donna=no
  779. use_curve25519_nacl=no
  780. CURVE25519_LIBS=
  781. dnl The best choice is using curve25519-donna-c64, but that requires
  782. dnl that we
  783. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  784. tor_cv_can_use_curve25519_donna_c64,
  785. [AC_RUN_IFELSE(
  786. [AC_LANG_PROGRAM([dnl
  787. #include <stdint.h>
  788. typedef unsigned uint128_t __attribute__((mode(TI)));
  789. int func(uint64_t a, uint64_t b) {
  790. uint128_t c = ((uint128_t)a) * b;
  791. int ok = ((uint64_t)(c>>96)) == 522859 &&
  792. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  793. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  794. (((uint64_t)(c))&0xffffffffL) == 0;
  795. return ok;
  796. }
  797. ], [dnl
  798. int ok = func( ((uint64_t)2000000000) * 1000000000,
  799. ((uint64_t)1234567890) << 24);
  800. return !ok;
  801. ])],
  802. [tor_cv_can_use_curve25519_donna_c64=yes],
  803. [tor_cv_can_use_curve25519_donna_c64=no],
  804. [AC_LINK_IFELSE(
  805. [AC_LANG_PROGRAM([dnl
  806. #include <stdint.h>
  807. typedef unsigned uint128_t __attribute__((mode(TI)));
  808. int func(uint64_t a, uint64_t b) {
  809. uint128_t c = ((uint128_t)a) * b;
  810. int ok = ((uint64_t)(c>>96)) == 522859 &&
  811. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  812. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  813. (((uint64_t)(c))&0xffffffffL) == 0;
  814. return ok;
  815. }
  816. ], [dnl
  817. int ok = func( ((uint64_t)2000000000) * 1000000000,
  818. ((uint64_t)1234567890) << 24);
  819. return !ok;
  820. ])],
  821. [tor_cv_can_use_curve25519_donna_c64=cross],
  822. [tor_cv_can_use_curve25519_donna_c64=no])])])
  823. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  824. nacl/crypto_scalarmult_curve25519.h])
  825. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  826. tor_cv_can_use_curve25519_nacl,
  827. [tor_saved_LIBS="$LIBS"
  828. LIBS="$LIBS -lnacl"
  829. AC_LINK_IFELSE(
  830. [AC_LANG_PROGRAM([dnl
  831. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  832. #include <crypto_scalarmult_curve25519.h>
  833. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  834. #include <nacl/crypto_scalarmult_curve25519.h>
  835. #endif
  836. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  837. #error Hey, this is the reference implementation! That's not fast.
  838. #endif
  839. ], [
  840. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  841. ])], [tor_cv_can_use_curve25519_nacl=yes],
  842. [tor_cv_can_use_curve25519_nacl=no])
  843. LIBS="$tor_saved_LIBS" ])
  844. dnl Okay, now we need to figure out which one to actually use. Fall back
  845. dnl to curve25519-donna.c
  846. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  847. build_curve25519_donna_c64=yes
  848. use_curve25519_donna=yes
  849. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  850. use_curve25519_nacl=yes
  851. CURVE25519_LIBS=-lnacl
  852. else
  853. build_curve25519_donna=yes
  854. use_curve25519_donna=yes
  855. fi
  856. if test "x$use_curve25519_donna" = "xyes"; then
  857. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  858. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  859. fi
  860. if test "x$use_curve25519_nacl" = "xyes"; then
  861. AC_DEFINE(USE_CURVE25519_NACL, 1,
  862. [Defined if we should use a curve25519 from nacl])
  863. fi
  864. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  865. test "x$build_curve25519_donna" = "xyes")
  866. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  867. test "x$build_curve25519_donna_c64" = "xyes")
  868. AC_SUBST(CURVE25519_LIBS)
  869. dnl Make sure to enable support for large off_t if available.
  870. AC_SYS_LARGEFILE
  871. AC_CHECK_HEADERS([assert.h \
  872. errno.h \
  873. fcntl.h \
  874. signal.h \
  875. string.h \
  876. sys/capability.h \
  877. sys/fcntl.h \
  878. sys/stat.h \
  879. sys/time.h \
  880. sys/types.h \
  881. time.h \
  882. unistd.h \
  883. arpa/inet.h \
  884. crt_externs.h \
  885. execinfo.h \
  886. gnu/libc-version.h \
  887. grp.h \
  888. ifaddrs.h \
  889. inttypes.h \
  890. limits.h \
  891. linux/types.h \
  892. machine/limits.h \
  893. malloc.h \
  894. malloc/malloc.h \
  895. malloc_np.h \
  896. netdb.h \
  897. netinet/in.h \
  898. netinet/in6.h \
  899. pwd.h \
  900. readpassphrase.h \
  901. stdint.h \
  902. sys/eventfd.h \
  903. sys/file.h \
  904. sys/ioctl.h \
  905. sys/limits.h \
  906. sys/mman.h \
  907. sys/param.h \
  908. sys/prctl.h \
  909. sys/random.h \
  910. sys/resource.h \
  911. sys/select.h \
  912. sys/socket.h \
  913. sys/statvfs.h \
  914. sys/syscall.h \
  915. sys/sysctl.h \
  916. sys/syslimits.h \
  917. sys/time.h \
  918. sys/types.h \
  919. sys/un.h \
  920. sys/utime.h \
  921. sys/wait.h \
  922. syslog.h \
  923. utime.h])
  924. AC_CHECK_HEADERS(sys/param.h)
  925. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  926. [#ifdef HAVE_SYS_TYPES_H
  927. #include <sys/types.h>
  928. #endif
  929. #ifdef HAVE_SYS_SOCKET_H
  930. #include <sys/socket.h>
  931. #endif])
  932. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  933. [#ifdef HAVE_SYS_TYPES_H
  934. #include <sys/types.h>
  935. #endif
  936. #ifdef HAVE_SYS_SOCKET_H
  937. #include <sys/socket.h>
  938. #endif
  939. #ifdef HAVE_NET_IF_H
  940. #include <net/if.h>
  941. #endif
  942. #ifdef HAVE_NETINET_IN_H
  943. #include <netinet/in.h>
  944. #endif])
  945. AC_CHECK_HEADERS(linux/if.h,[],[],
  946. [
  947. #ifdef HAVE_SYS_SOCKET_H
  948. #include <sys/socket.h>
  949. #endif
  950. ])
  951. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  952. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  953. [#ifdef HAVE_SYS_TYPES_H
  954. #include <sys/types.h>
  955. #endif
  956. #ifdef HAVE_SYS_SOCKET_H
  957. #include <sys/socket.h>
  958. #endif
  959. #ifdef HAVE_LIMITS_H
  960. #include <limits.h>
  961. #endif
  962. #ifdef HAVE_LINUX_TYPES_H
  963. #include <linux/types.h>
  964. #endif
  965. #ifdef HAVE_NETINET_IN6_H
  966. #include <netinet/in6.h>
  967. #endif
  968. #ifdef HAVE_NETINET_IN_H
  969. #include <netinet/in.h>
  970. #endif])
  971. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  972. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  973. [#ifdef HAVE_SYS_TYPES_H
  974. #include <sys/types.h>
  975. #endif
  976. #ifdef HAVE_SYS_SOCKET_H
  977. #include <sys/socket.h>
  978. #endif
  979. #ifdef HAVE_LIMITS_H
  980. #include <limits.h>
  981. #endif
  982. #ifdef HAVE_LINUX_TYPES_H
  983. #include <linux/types.h>
  984. #endif
  985. #ifdef HAVE_NETINET_IN6_H
  986. #include <netinet/in6.h>
  987. #endif
  988. #ifdef HAVE_NETINET_IN_H
  989. #include <netinet/in.h>
  990. #endif
  991. #ifdef HAVE_LINUX_IF_H
  992. #include <linux/if.h>
  993. #endif])
  994. transparent_ok=0
  995. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  996. transparent_ok=1
  997. fi
  998. if test "x$linux_netfilter_ipv4" = "x1"; then
  999. transparent_ok=1
  1000. fi
  1001. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1002. transparent_ok=1
  1003. fi
  1004. if test "x$transparent_ok" = "x1"; then
  1005. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1006. case "$host" in
  1007. *-*-openbsd* | *-*-bitrig*)
  1008. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  1009. esac
  1010. else
  1011. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1012. fi
  1013. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1014. [#ifdef HAVE_SYS_TYPES_H
  1015. #include <sys/types.h>
  1016. #endif
  1017. #ifdef HAVE_SYS_TIME_H
  1018. #include <sys/time.h>
  1019. #endif])
  1020. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1021. dnl Watch out.
  1022. AC_CHECK_SIZEOF(int8_t)
  1023. AC_CHECK_SIZEOF(int16_t)
  1024. AC_CHECK_SIZEOF(int32_t)
  1025. AC_CHECK_SIZEOF(int64_t)
  1026. AC_CHECK_SIZEOF(uint8_t)
  1027. AC_CHECK_SIZEOF(uint16_t)
  1028. AC_CHECK_SIZEOF(uint32_t)
  1029. AC_CHECK_SIZEOF(uint64_t)
  1030. AC_CHECK_SIZEOF(intptr_t)
  1031. AC_CHECK_SIZEOF(uintptr_t)
  1032. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1033. AC_CHECK_SIZEOF(char)
  1034. AC_CHECK_SIZEOF(short)
  1035. AC_CHECK_SIZEOF(int)
  1036. AC_CHECK_SIZEOF(long)
  1037. AC_CHECK_SIZEOF(long long)
  1038. AC_CHECK_SIZEOF(__int64)
  1039. AC_CHECK_SIZEOF(void *)
  1040. AC_CHECK_SIZEOF(time_t)
  1041. AC_CHECK_SIZEOF(size_t)
  1042. AC_CHECK_SIZEOF(pid_t)
  1043. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1044. AC_PC_FROM_UCONTEXT([:])
  1045. dnl used to include sockaddr_storage, but everybody has that.
  1046. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1047. [#ifdef HAVE_SYS_TYPES_H
  1048. #include <sys/types.h>
  1049. #endif
  1050. #ifdef HAVE_NETINET_IN_H
  1051. #include <netinet/in.h>
  1052. #endif
  1053. #ifdef HAVE_NETINET_IN6_H
  1054. #include <netinet/in6.h>
  1055. #endif
  1056. #ifdef HAVE_SYS_SOCKET_H
  1057. #include <sys/socket.h>
  1058. #endif
  1059. #ifdef _WIN32
  1060. #define _WIN32_WINNT 0x0501
  1061. #define WIN32_LEAN_AND_MEAN
  1062. #include <winsock2.h>
  1063. #include <ws2tcpip.h>
  1064. #endif
  1065. ])
  1066. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1067. [#ifdef HAVE_SYS_TYPES_H
  1068. #include <sys/types.h>
  1069. #endif
  1070. #ifdef HAVE_NETINET_IN_H
  1071. #include <netinet/in.h>
  1072. #endif
  1073. #ifdef HAVE_NETINET_IN6_H
  1074. #include <netinet/in6.h>
  1075. #endif
  1076. #ifdef HAVE_SYS_SOCKET_H
  1077. #include <sys/socket.h>
  1078. #endif
  1079. #ifdef _WIN32
  1080. #define _WIN32_WINNT 0x0501
  1081. #define WIN32_LEAN_AND_MEAN
  1082. #include <winsock2.h>
  1083. #include <ws2tcpip.h>
  1084. #endif
  1085. ])
  1086. AC_CHECK_TYPES([rlim_t], , ,
  1087. [#ifdef HAVE_SYS_TYPES_H
  1088. #include <sys/types.h>
  1089. #endif
  1090. #ifdef HAVE_SYS_TIME_H
  1091. #include <sys/time.h>
  1092. #endif
  1093. #ifdef HAVE_SYS_RESOURCE_H
  1094. #include <sys/resource.h>
  1095. #endif
  1096. ])
  1097. AX_CHECK_SIGN([time_t],
  1098. [ : ],
  1099. [ : ], [
  1100. #ifdef HAVE_SYS_TYPES_H
  1101. #include <sys/types.h>
  1102. #endif
  1103. #ifdef HAVE_SYS_TIME_H
  1104. #include <sys/time.h>
  1105. #endif
  1106. #ifdef HAVE_TIME_H
  1107. #include <time.h>
  1108. #endif
  1109. ])
  1110. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1111. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1112. fi
  1113. AX_CHECK_SIGN([size_t],
  1114. [ tor_cv_size_t_signed=yes ],
  1115. [ tor_cv_size_t_signed=no ], [
  1116. #ifdef HAVE_SYS_TYPES_H
  1117. #include <sys/types.h>
  1118. #endif
  1119. ])
  1120. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1121. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1122. fi
  1123. AX_CHECK_SIGN([enum always],
  1124. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1125. [ : ], [
  1126. enum always { AAA, BBB, CCC };
  1127. ])
  1128. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1129. #ifdef HAVE_SYS_SOCKET_H
  1130. #include <sys/socket.h>
  1131. #endif
  1132. ])
  1133. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1134. AC_CHECK_SIZEOF(cell_t)
  1135. # Now make sure that NULL can be represented as zero bytes.
  1136. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1137. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1138. [[#include <stdlib.h>
  1139. #include <string.h>
  1140. #include <stdio.h>
  1141. #ifdef HAVE_STDDEF_H
  1142. #include <stddef.h>
  1143. #endif
  1144. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1145. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1146. [tor_cv_null_is_zero=yes],
  1147. [tor_cv_null_is_zero=no],
  1148. [tor_cv_null_is_zero=cross])])
  1149. if test "$tor_cv_null_is_zero" = "cross"; then
  1150. # Cross-compiling; let's hope that the target isn't raving mad.
  1151. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1152. fi
  1153. if test "$tor_cv_null_is_zero" != "no"; then
  1154. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1155. [Define to 1 iff memset(0) sets pointers to NULL])
  1156. fi
  1157. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1158. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1159. [[#include <stdlib.h>
  1160. #include <string.h>
  1161. #include <stdio.h>
  1162. #ifdef HAVE_STDDEF_H
  1163. #include <stddef.h>
  1164. #endif
  1165. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1166. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1167. [tor_cv_dbl0_is_zero=yes],
  1168. [tor_cv_dbl0_is_zero=no],
  1169. [tor_cv_dbl0_is_zero=cross])])
  1170. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1171. # Cross-compiling; let's hope that the target isn't raving mad.
  1172. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1173. fi
  1174. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1175. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1176. [Define to 1 iff memset(0) sets doubles to 0.0])
  1177. fi
  1178. # And what happens when we malloc zero?
  1179. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1180. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1181. [[#include <stdlib.h>
  1182. #include <string.h>
  1183. #include <stdio.h>
  1184. #ifdef HAVE_STDDEF_H
  1185. #include <stddef.h>
  1186. #endif
  1187. int main () { return malloc(0)?0:1; }]])],
  1188. [tor_cv_malloc_zero_works=yes],
  1189. [tor_cv_malloc_zero_works=no],
  1190. [tor_cv_malloc_zero_works=cross])])
  1191. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1192. # Cross-compiling; let's hope that the target isn't raving mad.
  1193. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1194. fi
  1195. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1196. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1197. [Define to 1 iff malloc(0) returns a pointer])
  1198. fi
  1199. # whether we seem to be in a 2s-complement world.
  1200. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1201. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1202. [[int main () { int problem = ((-99) != (~99)+1);
  1203. return problem ? 1 : 0; }]])],
  1204. [tor_cv_twos_complement=yes],
  1205. [tor_cv_twos_complement=no],
  1206. [tor_cv_twos_complement=cross])])
  1207. if test "$tor_cv_twos_complement" = "cross"; then
  1208. # Cross-compiling; let's hope that the target isn't raving mad.
  1209. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1210. fi
  1211. if test "$tor_cv_twos_complement" != "no"; then
  1212. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1213. [Define to 1 iff we represent negative integers with
  1214. two's complement])
  1215. fi
  1216. # What does shifting a negative value do?
  1217. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1218. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1219. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1220. [tor_cv_sign_extend=yes],
  1221. [tor_cv_sign_extend=no],
  1222. [tor_cv_sign_extend=cross])])
  1223. if test "$tor_cv_sign_extend" = "cross"; then
  1224. # Cross-compiling; let's hope that the target isn't raving mad.
  1225. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1226. fi
  1227. if test "$tor_cv_sign_extend" != "no"; then
  1228. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1229. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1230. fi
  1231. # Whether we should use the dmalloc memory allocation debugging library.
  1232. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1233. AC_ARG_WITH(dmalloc,
  1234. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1235. [if [[ "$withval" = "yes" ]]; then
  1236. dmalloc=1
  1237. AC_MSG_RESULT(yes)
  1238. else
  1239. dmalloc=1
  1240. AC_MSG_RESULT(no)
  1241. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1242. )
  1243. if [[ $dmalloc -eq 1 ]]; then
  1244. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1245. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1246. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1247. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1248. fi
  1249. AC_ARG_WITH(tcmalloc,
  1250. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1251. [ tcmalloc=yes ], [ tcmalloc=no ])
  1252. if test "x$tcmalloc" = "xyes"; then
  1253. LDFLAGS="-ltcmalloc $LDFLAGS"
  1254. fi
  1255. using_custom_malloc=no
  1256. if test "x$enable_openbsd_malloc" = "xyes"; then
  1257. using_custom_malloc=yes
  1258. fi
  1259. if test "x$tcmalloc" = "xyes"; then
  1260. using_custom_malloc=yes
  1261. fi
  1262. if test "$using_custom_malloc" = "no"; then
  1263. AC_CHECK_FUNCS(mallinfo)
  1264. fi
  1265. if test "$using_custom_malloc" = "yes"; then
  1266. # Tell the C compiler not to use the system allocator functions.
  1267. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1268. fi
  1269. # By default, we're going to assume we don't have mlockall()
  1270. # bionic and other platforms have various broken mlockall subsystems.
  1271. # Some systems don't have a working mlockall, some aren't linkable,
  1272. # and some have it but don't declare it.
  1273. AC_CHECK_FUNCS(mlockall)
  1274. AC_CHECK_DECLS([mlockall], , , [
  1275. #ifdef HAVE_SYS_MMAN_H
  1276. #include <sys/mman.h>
  1277. #endif])
  1278. # Allow user to specify an alternate syslog facility
  1279. AC_ARG_WITH(syslog-facility,
  1280. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1281. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1282. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1283. AC_SUBST(LOGFACILITY)
  1284. # Check if we have getresuid and getresgid
  1285. AC_CHECK_FUNCS(getresuid getresgid)
  1286. # Check for gethostbyname_r in all its glorious incompatible versions.
  1287. # (This logic is based on that in Python's configure.in)
  1288. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1289. [Define this if you have any gethostbyname_r()])
  1290. AC_CHECK_FUNC(gethostbyname_r, [
  1291. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1292. OLD_CFLAGS=$CFLAGS
  1293. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1294. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1295. #include <netdb.h>
  1296. ], [[
  1297. char *cp1, *cp2;
  1298. struct hostent *h1, *h2;
  1299. int i1, i2;
  1300. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1301. ]])],[
  1302. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1303. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1304. [Define this if gethostbyname_r takes 6 arguments])
  1305. AC_MSG_RESULT(6)
  1306. ], [
  1307. AC_TRY_COMPILE([
  1308. #include <netdb.h>
  1309. ], [
  1310. char *cp1, *cp2;
  1311. struct hostent *h1;
  1312. int i1, i2;
  1313. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1314. ], [
  1315. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1316. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1317. [Define this if gethostbyname_r takes 5 arguments])
  1318. AC_MSG_RESULT(5)
  1319. ], [
  1320. AC_TRY_COMPILE([
  1321. #include <netdb.h>
  1322. ], [
  1323. char *cp1;
  1324. struct hostent *h1;
  1325. struct hostent_data hd;
  1326. (void) gethostbyname_r(cp1,h1,&hd);
  1327. ], [
  1328. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1329. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1330. [Define this if gethostbyname_r takes 3 arguments])
  1331. AC_MSG_RESULT(3)
  1332. ], [
  1333. AC_MSG_RESULT(0)
  1334. ])
  1335. ])
  1336. ])
  1337. CFLAGS=$OLD_CFLAGS
  1338. ])
  1339. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1340. tor_cv_have_func_macro,
  1341. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1342. #include <stdio.h>
  1343. int main(int c, char **v) { puts(__func__); }])],
  1344. tor_cv_have_func_macro=yes,
  1345. tor_cv_have_func_macro=no))
  1346. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1347. tor_cv_have_FUNC_macro,
  1348. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1349. #include <stdio.h>
  1350. int main(int c, char **v) { puts(__FUNC__); }])],
  1351. tor_cv_have_FUNC_macro=yes,
  1352. tor_cv_have_FUNC_macro=no))
  1353. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1354. tor_cv_have_FUNCTION_macro,
  1355. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1356. #include <stdio.h>
  1357. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1358. tor_cv_have_FUNCTION_macro=yes,
  1359. tor_cv_have_FUNCTION_macro=no))
  1360. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1361. tor_cv_have_environ_declared,
  1362. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1363. #ifdef HAVE_UNISTD_H
  1364. #include <unistd.h>
  1365. #endif
  1366. #include <stdlib.h>
  1367. int main(int c, char **v) { char **t = environ; }])],
  1368. tor_cv_have_environ_declared=yes,
  1369. tor_cv_have_environ_declared=no))
  1370. if test "$tor_cv_have_func_macro" = "yes"; then
  1371. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1372. fi
  1373. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1374. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1375. fi
  1376. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1377. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1378. [Defined if the compiler supports __FUNCTION__])
  1379. fi
  1380. if test "$tor_cv_have_environ_declared" = "yes"; then
  1381. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1382. [Defined if we have extern char **environ already declared])
  1383. fi
  1384. # $prefix stores the value of the --prefix command line option, or
  1385. # NONE if the option wasn't set. In the case that it wasn't set, make
  1386. # it be the default, so that we can use it to expand directories now.
  1387. if test "x$prefix" = "xNONE"; then
  1388. prefix=$ac_default_prefix
  1389. fi
  1390. # and similarly for $exec_prefix
  1391. if test "x$exec_prefix" = "xNONE"; then
  1392. exec_prefix=$prefix
  1393. fi
  1394. if test "x$BUILDDIR" = "x"; then
  1395. BUILDDIR=`pwd`
  1396. fi
  1397. AC_SUBST(BUILDDIR)
  1398. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1399. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1400. if test "x$CONFDIR" = "x"; then
  1401. CONFDIR=`eval echo $sysconfdir/tor`
  1402. fi
  1403. AC_SUBST(CONFDIR)
  1404. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1405. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1406. BINDIR=`eval echo $bindir`
  1407. AC_SUBST(BINDIR)
  1408. LOCALSTATEDIR=`eval echo $localstatedir`
  1409. AC_SUBST(LOCALSTATEDIR)
  1410. if test "$bwin32" = "true"; then
  1411. # Test if the linker supports the --nxcompat and --dynamicbase options
  1412. # for Windows
  1413. save_LDFLAGS="$LDFLAGS"
  1414. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1415. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1416. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1417. [AC_MSG_RESULT([yes])]
  1418. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1419. [AC_MSG_RESULT([no])]
  1420. )
  1421. LDFLAGS="$save_LDFLAGS"
  1422. fi
  1423. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1424. # than autoconf's macros like.
  1425. if test "$GCC" = "yes"; then
  1426. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1427. # accident waiting to happen.
  1428. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1429. else
  1430. # Override optimization level for non-gcc compilers
  1431. CFLAGS="$CFLAGS -O"
  1432. enable_gcc_warnings=no
  1433. enable_gcc_warnings_advisory=no
  1434. fi
  1435. # Warnings implies advisory-warnings and -Werror.
  1436. if test "$enable_gcc_warnings" = "yes"; then
  1437. enable_gcc_warnings_advisory=yes
  1438. enable_fatal_warnings=yes
  1439. fi
  1440. # OS X Lion started deprecating the system openssl. Let's just disable
  1441. # all deprecation warnings on OS X. Also, to potentially make the binary
  1442. # a little smaller, let's enable dead_strip.
  1443. case "$host_os" in
  1444. darwin*)
  1445. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1446. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1447. esac
  1448. # Add some more warnings which we use in development but not in the
  1449. # released versions. (Some relevant gcc versions can't handle these.)
  1450. #
  1451. # Note that we have to do this near the end of the autoconf process, or
  1452. # else we may run into problems when these warnings hit on the testing C
  1453. # programs that autoconf wants to build.
  1454. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1455. case "$host" in
  1456. *-*-openbsd* | *-*-bitrig*)
  1457. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1458. # That's fine, except that the headers don't pass -Wredundant-decls.
  1459. # Therefore, let's disable -Wsystem-headers when we're building
  1460. # with maximal warnings on OpenBSD.
  1461. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1462. esac
  1463. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1464. # have it work better.
  1465. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1466. # This warning was added in gcc 4.3, but it appears to generate
  1467. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1468. #CFLAGS="$CFLAGS -Wlogical-op"
  1469. m4_foreach_w([warning_flag], [
  1470. -Waddress
  1471. -Waddress-of-array-temporary
  1472. -Waddress-of-temporary
  1473. -Wambiguous-macro
  1474. -Wanonymous-pack-parens
  1475. -Warc
  1476. -Warc-abi
  1477. -Warc-bridge-casts-disallowed-in-nonarc
  1478. -Warc-maybe-repeated-use-of-weak
  1479. -Warc-performSelector-leaks
  1480. -Warc-repeated-use-of-weak
  1481. -Warray-bounds
  1482. -Warray-bounds-pointer-arithmetic
  1483. -Wasm
  1484. -Wasm-operand-widths
  1485. -Watomic-properties
  1486. -Watomic-property-with-user-defined-accessor
  1487. -Wauto-import
  1488. -Wauto-storage-class
  1489. -Wauto-var-id
  1490. -Wavailability
  1491. -Wbackslash-newline-escape
  1492. -Wbad-array-new-length
  1493. -Wbind-to-temporary-copy
  1494. -Wbitfield-constant-conversion
  1495. -Wbool-conversion
  1496. -Wbool-conversions
  1497. -Wbuiltin-requires-header
  1498. -Wchar-align
  1499. -Wcompare-distinct-pointer-types
  1500. -Wcomplex-component-init
  1501. -Wconditional-type-mismatch
  1502. -Wconfig-macros
  1503. -Wconstant-conversion
  1504. -Wconstant-logical-operand
  1505. -Wconstexpr-not-const
  1506. -Wcustom-atomic-properties
  1507. -Wdangling-field
  1508. -Wdangling-initializer-list
  1509. -Wdate-time
  1510. -Wdelegating-ctor-cycles
  1511. -Wdeprecated-implementations
  1512. -Wdeprecated-register
  1513. -Wdirect-ivar-access
  1514. -Wdiscard-qual
  1515. -Wdistributed-object-modifiers
  1516. -Wdivision-by-zero
  1517. -Wdollar-in-identifier-extension
  1518. -Wdouble-promotion
  1519. -Wduplicate-decl-specifier
  1520. -Wduplicate-enum
  1521. -Wduplicate-method-arg
  1522. -Wduplicate-method-match
  1523. -Wduplicated-cond
  1524. -Wdynamic-class-memaccess
  1525. -Wembedded-directive
  1526. -Wempty-translation-unit
  1527. -Wenum-conversion
  1528. -Wexit-time-destructors
  1529. -Wexplicit-ownership-type
  1530. -Wextern-initializer
  1531. -Wextra
  1532. -Wextra-semi
  1533. -Wextra-tokens
  1534. -Wflexible-array-extensions
  1535. -Wfloat-conversion
  1536. -Wformat-non-iso
  1537. -Wfour-char-constants
  1538. -Wgcc-compat
  1539. -Wglobal-constructors
  1540. -Wgnu-array-member-paren-init
  1541. -Wgnu-designator
  1542. -Wgnu-static-float-init
  1543. -Wheader-guard
  1544. -Wheader-hygiene
  1545. -Widiomatic-parentheses
  1546. -Wignored-attributes
  1547. -Wimplicit-atomic-properties
  1548. -Wimplicit-conversion-floating-point-to-bool
  1549. -Wimplicit-exception-spec-mismatch
  1550. -Wimplicit-fallthrough
  1551. -Wimplicit-fallthrough-per-function
  1552. -Wimplicit-retain-self
  1553. -Wimport-preprocessor-directive-pedantic
  1554. -Wincompatible-library-redeclaration
  1555. -Wincompatible-pointer-types-discards-qualifiers
  1556. -Wincomplete-implementation
  1557. -Wincomplete-module
  1558. -Wincomplete-umbrella
  1559. -Winit-self
  1560. -Wint-conversions
  1561. -Wint-to-void-pointer-cast
  1562. -Winteger-overflow
  1563. -Winvalid-constexpr
  1564. -Winvalid-iboutlet
  1565. -Winvalid-noreturn
  1566. -Winvalid-pp-token
  1567. -Winvalid-source-encoding
  1568. -Winvalid-token-paste
  1569. -Wknr-promoted-parameter
  1570. -Wlanguage-extension-token
  1571. -Wlarge-by-value-copy
  1572. -Wliteral-conversion
  1573. -Wliteral-range
  1574. -Wlocal-type-template-args
  1575. -Wlogical-op
  1576. -Wloop-analysis
  1577. -Wmain-return-type
  1578. -Wmalformed-warning-check
  1579. -Wmethod-signatures
  1580. -Wmicrosoft
  1581. -Wmicrosoft-exists
  1582. -Wmismatched-parameter-types
  1583. -Wmismatched-return-types
  1584. -Wmissing-field-initializers
  1585. -Wmissing-format-attribute
  1586. -Wmissing-noreturn
  1587. -Wmissing-selector-name
  1588. -Wmissing-sysroot
  1589. -Wmissing-variable-declarations
  1590. -Wmodule-conflict
  1591. -Wnested-anon-types
  1592. -Wnewline-eof
  1593. -Wnon-literal-null-conversion
  1594. -Wnon-pod-varargs
  1595. -Wnonportable-cfstrings
  1596. -Wnormalized=id
  1597. -Wnull-arithmetic
  1598. -Wnull-character
  1599. -Wnull-conversion
  1600. -Wnull-dereference
  1601. -Wout-of-line-declaration
  1602. -Wover-aligned
  1603. -Woverlength-strings
  1604. -Woverride-init
  1605. -Woverriding-method-mismatch
  1606. -Wpointer-type-mismatch
  1607. -Wpredefined-identifier-outside-function
  1608. -Wprotocol-property-synthesis-ambiguity
  1609. -Wreadonly-iboutlet-property
  1610. -Wreadonly-setter-attrs
  1611. -Wreceiver-expr
  1612. -Wreceiver-forward-class
  1613. -Wreceiver-is-weak
  1614. -Wreinterpret-base-class
  1615. -Wrequires-super-attribute
  1616. -Wreserved-user-defined-literal
  1617. -Wreturn-stack-address
  1618. -Wsection
  1619. -Wselector-type-mismatch
  1620. -Wsentinel
  1621. -Wserialized-diagnostics
  1622. -Wshadow
  1623. -Wshift-count-negative
  1624. -Wshift-count-overflow
  1625. -Wshift-negative-value
  1626. -Wshift-overflow=2
  1627. -Wshift-sign-overflow
  1628. -Wshorten-64-to-32
  1629. -Wsizeof-array-argument
  1630. -Wsource-uses-openmp
  1631. -Wstatic-float-init
  1632. -Wstatic-in-inline
  1633. -Wstatic-local-in-inline
  1634. -Wstrict-overflow=1
  1635. -Wstring-compare
  1636. -Wstring-conversion
  1637. -Wstrlcpy-strlcat-size
  1638. -Wstrncat-size
  1639. -Wsuggest-attribute=format
  1640. -Wsuggest-attribute=noreturn
  1641. -Wsuper-class-method-mismatch
  1642. -Wswitch-bool
  1643. -Wsync-nand
  1644. -Wtautological-constant-out-of-range-compare
  1645. -Wtentative-definition-incomplete-type
  1646. -Wtrampolines
  1647. -Wtype-safety
  1648. -Wtypedef-redefinition
  1649. -Wtypename-missing
  1650. -Wundefined-inline
  1651. -Wundefined-internal
  1652. -Wundefined-reinterpret-cast
  1653. -Wunicode
  1654. -Wunicode-whitespace
  1655. -Wunknown-warning-option
  1656. -Wunnamed-type-template-args
  1657. -Wunneeded-member-function
  1658. -Wunsequenced
  1659. -Wunsupported-visibility
  1660. -Wunused-but-set-parameter
  1661. -Wunused-but-set-variable
  1662. -Wunused-command-line-argument
  1663. -Wunused-const-variable=2
  1664. -Wunused-exception-parameter
  1665. -Wunused-local-typedefs
  1666. -Wunused-member-function
  1667. -Wunused-sanitize-argument
  1668. -Wunused-volatile-lvalue
  1669. -Wuser-defined-literals
  1670. -Wvariadic-macros
  1671. -Wvector-conversion
  1672. -Wvector-conversions
  1673. -Wvexing-parse
  1674. -Wvisibility
  1675. -Wvla-extension
  1676. -Wzero-length-array
  1677. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1678. dnl We should re-enable this in some later version. Clang doesn't
  1679. dnl mind, but it causes trouble with GCC.
  1680. dnl -Wstrict-overflow=2
  1681. dnl These seem to require annotations that we don't currently use,
  1682. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1683. dnl -Wthread-safety
  1684. dnl -Wthread-safety-analysis
  1685. dnl -Wthread-safety-attributes
  1686. dnl -Wthread-safety-beta
  1687. dnl -Wthread-safety-precise
  1688. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1689. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1690. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1691. CFLAGS="$CFLAGS -Wwrite-strings"
  1692. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1693. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1694. CFLAGS="$CFLAGS -Wunused-parameter "
  1695. # These interfere with building main() { return 0; }, which autoconf
  1696. # likes to use as its default program.
  1697. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1698. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1699. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1700. fi
  1701. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1702. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1703. fi
  1704. if test "x$enable_fatal_warnings" = "xyes"; then
  1705. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1706. # default autoconf programs are full of errors.
  1707. CFLAGS="$CFLAGS -Werror"
  1708. fi
  1709. fi
  1710. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1711. case "$host_os" in
  1712. darwin*)
  1713. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1714. esac
  1715. fi
  1716. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1717. AC_CONFIG_FILES([
  1718. Doxyfile
  1719. Makefile
  1720. contrib/dist/suse/tor.sh
  1721. contrib/operator-tools/tor.logrotate
  1722. contrib/dist/tor.sh
  1723. contrib/dist/torctl
  1724. contrib/dist/tor.service
  1725. src/config/torrc.sample
  1726. src/config/torrc.minimal
  1727. scripts/maint/checkOptionDocs.pl
  1728. scripts/maint/updateVersions.pl
  1729. ])
  1730. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1731. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1732. for file in $regular_mans ; do
  1733. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1734. echo "==================================";
  1735. echo;
  1736. echo "Building Tor has failed since manpages cannot be built.";
  1737. echo;
  1738. echo "You need asciidoc installed to be able to build the manpages.";
  1739. echo "To build without manpages, use the --disable-asciidoc argument";
  1740. echo "when calling configure.";
  1741. echo;
  1742. echo "==================================";
  1743. exit 1;
  1744. fi
  1745. done
  1746. fi
  1747. AC_OUTPUT