configure.ac 56 KB

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  1. dnl Copyright (c) 2001-2004, Roger Dingledine
  2. dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
  3. dnl Copyright (c) 2007-2015, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_PREREQ([2.63])
  6. AC_INIT([tor],[0.2.9.0-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_CANONICAL_HOST
  16. PKG_PROG_PKG_CONFIG
  17. if test -f "/etc/redhat-release"; then
  18. if test -f "/usr/kerberos/include"; then
  19. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  20. fi
  21. fi
  22. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  23. # the += operator on it in src/or/Makefile.am
  24. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  25. AC_ARG_ENABLE(openbsd-malloc,
  26. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  27. AC_ARG_ENABLE(static-openssl,
  28. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  29. AC_ARG_ENABLE(static-libevent,
  30. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  31. AC_ARG_ENABLE(static-zlib,
  32. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  33. AC_ARG_ENABLE(static-tor,
  34. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  35. AC_ARG_ENABLE(unittests,
  36. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  37. AC_ARG_ENABLE(coverage,
  38. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  39. AC_ARG_ENABLE(asserts-in-tests,
  40. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  41. AC_ARG_ENABLE(system-torrc,
  42. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  43. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  44. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  45. fi
  46. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  47. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  48. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  49. if test "$enable_static_tor" = "yes"; then
  50. enable_static_libevent="yes";
  51. enable_static_openssl="yes";
  52. enable_static_zlib="yes";
  53. CFLAGS="$CFLAGS -static"
  54. fi
  55. if test "$enable_system_torrc" = "no"; then
  56. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  57. [Defined if we're not going to look for a torrc in SYSCONF])
  58. fi
  59. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  60. AC_ARG_ENABLE(transparent,
  61. AS_HELP_STRING(--disable-transparent, [disable transparent proxy support]),
  62. [case "${enableval}" in
  63. "yes") transparent=true ;;
  64. "no") transparent=false ;;
  65. *) AC_MSG_ERROR(bad value for --enable-transparent) ;;
  66. esac], [transparent=true])
  67. AC_ARG_ENABLE(asciidoc,
  68. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  69. [case "${enableval}" in
  70. "yes") asciidoc=true ;;
  71. "no") asciidoc=false ;;
  72. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  73. esac], [asciidoc=true])
  74. # systemd notify support
  75. AC_ARG_ENABLE(systemd,
  76. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  77. [case "${enableval}" in
  78. "yes") systemd=true ;;
  79. "no") systemd=false ;;
  80. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  81. esac], [systemd=auto])
  82. # systemd support
  83. if test "x$enable_systemd" = "xno"; then
  84. have_systemd=no;
  85. else
  86. PKG_CHECK_MODULES(SYSTEMD,
  87. [libsystemd-daemon],
  88. have_systemd=yes,
  89. have_systemd=no)
  90. if test "x$have_systemd" = "xno"; then
  91. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  92. PKG_CHECK_MODULES(SYSTEMD,
  93. [libsystemd],
  94. have_systemd=yes,
  95. have_systemd=no)
  96. fi
  97. fi
  98. if test "x$have_systemd" = "xyes"; then
  99. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  100. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  101. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  102. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  103. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  104. fi
  105. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  106. AC_SUBST(TOR_SYSTEMD_LIBS)
  107. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  108. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  109. fi
  110. case "$host" in
  111. *-*-solaris* )
  112. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  113. ;;
  114. esac
  115. AC_ARG_ENABLE(gcc-warnings,
  116. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  117. AC_ARG_ENABLE(fatal-warnings,
  118. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  119. AC_ARG_ENABLE(gcc-warnings-advisory,
  120. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  121. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  122. AC_ARG_ENABLE(gcc-hardening,
  123. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  124. AC_ARG_ENABLE(expensive-hardening,
  125. AS_HELP_STRING(--enable-expensive-hardening, [enable more expensive compiler hardening; makes Tor slower]))
  126. dnl Linker hardening options
  127. dnl Currently these options are ELF specific - you can't use this with MacOSX
  128. AC_ARG_ENABLE(linker-hardening,
  129. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  130. AC_ARG_ENABLE(local-appdata,
  131. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  132. if test "$enable_local_appdata" = "yes"; then
  133. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  134. [Defined if we default to host local appdata paths on Windows])
  135. fi
  136. # Tor2web mode flag
  137. AC_ARG_ENABLE(tor2web-mode,
  138. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  139. [if test "x$enableval" = "xyes"; then
  140. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  141. fi])
  142. AC_ARG_ENABLE(bufferevents,
  143. AS_HELP_STRING(--enable-bufferevents, [use Libevent's buffered IO]))
  144. AC_ARG_ENABLE(tool-name-check,
  145. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  146. AC_ARG_ENABLE(seccomp,
  147. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  148. AC_ARG_ENABLE(libscrypt,
  149. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  150. dnl check for the correct "ar" when cross-compiling
  151. AN_MAKEVAR([AR], [AC_PROG_AR])
  152. AN_PROGRAM([ar], [AC_PROG_AR])
  153. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [ar])])
  154. AC_PROG_AR
  155. dnl Check whether the above macro has settled for a simply named tool even
  156. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  157. dnl because that will find any cc on the system, not only the cross-compiler,
  158. dnl and then verify that a binary built with this compiler runs on the
  159. dnl build system. It will then come to the false conclusion that we're not
  160. dnl cross-compiling.
  161. if test "x$enable_tool_name_check" != "xno"; then
  162. if test "x$ac_tool_warned" = "xyes"; then
  163. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  164. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  165. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  166. fi
  167. fi
  168. AC_PROG_CC
  169. AC_PROG_CPP
  170. AC_PROG_MAKE_SET
  171. AC_PROG_RANLIB
  172. AC_PATH_PROG([PERL], [perl])
  173. dnl autoconf 2.59 appears not to support AC_PROG_SED
  174. AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
  175. dnl check for asciidoc and a2x
  176. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  177. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  178. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  179. AM_CONDITIONAL(USE_FW_HELPER, test "x$natpmp" = "xtrue" || test "x$upnp" = "xtrue")
  180. AM_CONDITIONAL(NAT_PMP, test "x$natpmp" = "xtrue")
  181. AM_CONDITIONAL(MINIUPNPC, test "x$upnp" = "xtrue")
  182. AM_PROG_CC_C_O
  183. AC_PROG_CC_C99
  184. AC_ARG_VAR([PYTHON], [path to Python binary])
  185. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  186. if test "x$PYTHON" = "x"; then
  187. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  188. fi
  189. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  190. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  191. AC_C_FLEXIBLE_ARRAY_MEMBER
  192. ], [
  193. dnl Maybe we've got an old autoconf...
  194. AC_CACHE_CHECK([for flexible array members],
  195. tor_cv_c_flexarray,
  196. [AC_COMPILE_IFELSE(
  197. AC_LANG_PROGRAM([
  198. struct abc { int a; char b[]; };
  199. ], [
  200. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  201. def->b[0] = 33;
  202. ]),
  203. [tor_cv_c_flexarray=yes],
  204. [tor_cv_c_flexarray=no])])
  205. if test "$tor_cv_flexarray" = "yes"; then
  206. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  207. else
  208. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  209. fi
  210. ])
  211. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  212. tor_cv_c_c99_decl,
  213. [AC_COMPILE_IFELSE(
  214. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  215. [tor_cv_c_c99_decl=yes],
  216. [tor_cv_c_c99_decl=no] )])
  217. if test "$tor_cv_c_c99_decl" != "yes"; then
  218. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  219. fi
  220. AC_CACHE_CHECK([for working C99 designated initializers],
  221. tor_cv_c_c99_designated_init,
  222. [AC_COMPILE_IFELSE(
  223. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  224. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  225. [tor_cv_c_c99_designated_init=yes],
  226. [tor_cv_c_c99_designated_init=no] )])
  227. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  228. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  229. fi
  230. TORUSER=_tor
  231. AC_ARG_WITH(tor-user,
  232. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  233. [
  234. TORUSER=$withval
  235. ]
  236. )
  237. AC_SUBST(TORUSER)
  238. TORGROUP=_tor
  239. AC_ARG_WITH(tor-group,
  240. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  241. [
  242. TORGROUP=$withval
  243. ]
  244. )
  245. AC_SUBST(TORGROUP)
  246. dnl If _WIN32 is defined and non-zero, we are building for win32
  247. AC_MSG_CHECKING([for win32])
  248. AC_RUN_IFELSE([AC_LANG_SOURCE([
  249. int main(int c, char **v) {
  250. #ifdef _WIN32
  251. #if _WIN32
  252. return 0;
  253. #else
  254. return 1;
  255. #endif
  256. #else
  257. return 2;
  258. #endif
  259. }])],
  260. bwin32=true; AC_MSG_RESULT([yes]),
  261. bwin32=false; AC_MSG_RESULT([no]),
  262. bwin32=cross; AC_MSG_RESULT([cross])
  263. )
  264. if test "$bwin32" = "cross"; then
  265. AC_MSG_CHECKING([for win32 (cross)])
  266. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  267. #ifdef _WIN32
  268. int main(int c, char **v) {return 0;}
  269. #else
  270. #error
  271. int main(int c, char **v) {return x(y);}
  272. #endif
  273. ])],
  274. bwin32=true; AC_MSG_RESULT([yes]),
  275. bwin32=false; AC_MSG_RESULT([no]))
  276. fi
  277. AH_BOTTOM([
  278. #ifdef _WIN32
  279. /* Defined to access windows functions and definitions for >=WinXP */
  280. # ifndef WINVER
  281. # define WINVER 0x0501
  282. # endif
  283. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  284. # ifndef _WIN32_WINNT
  285. # define _WIN32_WINNT 0x0501
  286. # endif
  287. /* Defined to avoid including some windows headers as part of Windows.h */
  288. # ifndef WIN32_LEAN_AND_MEAN
  289. # define WIN32_LEAN_AND_MEAN 1
  290. # endif
  291. #endif
  292. ])
  293. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  294. dnl Enable C99 when compiling with MIPSpro
  295. AC_MSG_CHECKING([for MIPSpro compiler])
  296. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  297. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  298. #error
  299. return x(y);
  300. #endif
  301. ])],
  302. bmipspro=false; AC_MSG_RESULT(no),
  303. bmipspro=true; AC_MSG_RESULT(yes))
  304. if test "$bmipspro" = "true"; then
  305. CFLAGS="$CFLAGS -c99"
  306. fi
  307. AC_C_BIGENDIAN
  308. AC_SEARCH_LIBS(socket, [socket network])
  309. AC_SEARCH_LIBS(gethostbyname, [nsl])
  310. AC_SEARCH_LIBS(dlopen, [dl])
  311. AC_SEARCH_LIBS(inet_aton, [resolv])
  312. AC_SEARCH_LIBS(backtrace, [execinfo])
  313. saved_LIBS="$LIBS"
  314. AC_SEARCH_LIBS([clock_gettime], [rt])
  315. if test "$LIBS" != "$saved_LIBS"; then
  316. # Looks like we need -lrt for clock_gettime().
  317. have_rt=yes
  318. fi
  319. AC_SEARCH_LIBS(pthread_create, [pthread])
  320. AC_SEARCH_LIBS(pthread_detach, [pthread])
  321. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  322. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  323. AC_CHECK_FUNCS(
  324. _NSGetEnviron \
  325. RtlSecureZeroMemory \
  326. SecureZeroMemory \
  327. accept4 \
  328. backtrace \
  329. backtrace_symbols_fd \
  330. clock_gettime \
  331. eventfd \
  332. explicit_bzero \
  333. timingsafe_memcmp \
  334. flock \
  335. ftime \
  336. getaddrinfo \
  337. getentropy \
  338. getifaddrs \
  339. getpass \
  340. getrlimit \
  341. gettimeofday \
  342. gmtime_r \
  343. htonll \
  344. inet_aton \
  345. ioctl \
  346. issetugid \
  347. llround \
  348. localtime_r \
  349. lround \
  350. memmem \
  351. memset_s \
  352. pipe \
  353. pipe2 \
  354. prctl \
  355. readpassphrase \
  356. rint \
  357. sigaction \
  358. socketpair \
  359. statvfs \
  360. strlcat \
  361. strlcpy \
  362. strnlen \
  363. strptime \
  364. strtok_r \
  365. strtoull \
  366. sysconf \
  367. sysctl \
  368. truncate \
  369. uname \
  370. usleep \
  371. vasprintf \
  372. _vscprintf
  373. )
  374. if test "$bwin32" != "true"; then
  375. AC_CHECK_HEADERS(pthread.h)
  376. AC_CHECK_FUNCS(pthread_create)
  377. AC_CHECK_FUNCS(pthread_condattr_setclock)
  378. fi
  379. if test "$bwin32" = "true"; then
  380. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  381. #include <windows.h>
  382. #include <conio.h>
  383. #include <wchar.h>
  384. ])
  385. fi
  386. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  387. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  388. dnl ------------------------------------------------------
  389. dnl Where do you live, libevent? And how do we call you?
  390. if test "$bwin32" = "true"; then
  391. TOR_LIB_WS32=-lws2_32
  392. TOR_LIB_IPHLPAPI=-liphlpapi
  393. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  394. # think it's actually necessary.
  395. TOR_LIB_GDI=-lgdi32
  396. else
  397. TOR_LIB_WS32=
  398. TOR_LIB_GDI=
  399. fi
  400. AC_SUBST(TOR_LIB_WS32)
  401. AC_SUBST(TOR_LIB_GDI)
  402. AC_SUBST(TOR_LIB_IPHLPAPI)
  403. tor_libevent_pkg_redhat="libevent"
  404. tor_libevent_pkg_debian="libevent-dev"
  405. tor_libevent_devpkg_redhat="libevent-devel"
  406. tor_libevent_devpkg_debian="libevent-dev"
  407. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  408. dnl linking for static builds.
  409. STATIC_LIBEVENT_FLAGS=""
  410. if test "$enable_static_libevent" = "yes"; then
  411. if test "$have_rt" = "yes"; then
  412. STATIC_LIBEVENT_FLAGS=" -lrt "
  413. fi
  414. fi
  415. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  416. #ifdef _WIN32
  417. #include <winsock2.h>
  418. #endif
  419. #include <sys/time.h>
  420. #include <sys/types.h>
  421. #include <event.h>], [
  422. #ifdef _WIN32
  423. #include <winsock2.h>
  424. #endif
  425. void *event_init(void);],
  426. [
  427. #ifdef _WIN32
  428. {WSADATA d; WSAStartup(0x101,&d); }
  429. #endif
  430. event_init();
  431. ], [--with-libevent-dir], [/opt/libevent])
  432. dnl Now check for particular libevent functions.
  433. save_LIBS="$LIBS"
  434. save_LDFLAGS="$LDFLAGS"
  435. save_CPPFLAGS="$CPPFLAGS"
  436. LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
  437. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  438. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  439. AC_CHECK_FUNCS([event_get_version_number \
  440. evutil_secure_rng_set_urandom_device_file \
  441. evutil_secure_rng_init \
  442. ])
  443. AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
  444. [#include <event.h>
  445. ])
  446. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  447. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  448. AM_CONDITIONAL(USE_EXTERNAL_EVDNS,
  449. test "x$ac_cv_header_event2_dns_h" = "xyes")
  450. if test "$enable_static_libevent" = "yes"; then
  451. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  452. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  453. else
  454. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  455. fi
  456. else
  457. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  458. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  459. 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"))
  460. if test "$ac_cv_search_event_new" != "none required"; then
  461. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  462. fi
  463. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  464. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  465. fi
  466. else
  467. TOR_LIBEVENT_LIBS="-levent"
  468. fi
  469. fi
  470. LIBS="$save_LIBS"
  471. LDFLAGS="$save_LDFLAGS"
  472. CPPFLAGS="$save_CPPFLAGS"
  473. dnl This isn't the best test for Libevent 2.0.3-alpha. Once it's released,
  474. dnl we can do much better.
  475. if test "$enable_bufferevents" = "yes"; then
  476. if test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes"; then
  477. AC_MSG_ERROR([You've asked for bufferevent support, but you're using a version of Libevent without SSL support. This won't work. We need Libevent 2.0.8-rc or later, and you don't seem to even have Libevent 2.0.3-alpha.])
  478. else
  479. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  480. # Check for the right version. First see if version detection works.
  481. AC_MSG_CHECKING([whether we can detect the Libevent version])
  482. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  483. #include <event2/event.h>
  484. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 10
  485. #error
  486. int x = y(zz);
  487. #else
  488. int x = 1;
  489. #endif
  490. ])], [event_version_number_works=yes; AC_MSG_RESULT([yes]) ],
  491. [event_version_number_works=no; AC_MSG_RESULT([no])])
  492. if test "$event_version_number_works" != "yes"; then
  493. AC_MSG_WARN([Version detection on Libevent seems broken. Your Libevent installation is probably screwed up or very old.])
  494. else
  495. AC_MSG_CHECKING([whether Libevent is new enough for bufferevents])
  496. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  497. #include <event2/event.h>
  498. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000d00
  499. #error
  500. int x = y(zz);
  501. #else
  502. int x = 1;
  503. #endif
  504. ])], [ AC_MSG_RESULT([yes]) ],
  505. [ AC_MSG_RESULT([no])
  506. AC_MSG_ERROR([Libevent does not seem new enough to support bufferevents. We require 2.0.13-stable or later]) ] )
  507. fi
  508. fi
  509. fi
  510. LIBS="$save_LIBS"
  511. LDFLAGS="$save_LDFLAGS"
  512. CPPFLAGS="$save_CPPFLAGS"
  513. AM_CONDITIONAL(USE_BUFFEREVENTS, test "$enable_bufferevents" = "yes")
  514. if test "$enable_bufferevents" = "yes"; then
  515. AC_DEFINE(USE_BUFFEREVENTS, 1, [Defined if we're going to use Libevent's buffered IO API])
  516. if test "$enable_static_libevent" = "yes"; then
  517. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent_openssl.a $TOR_LIBEVENT_LIBS"
  518. else
  519. TOR_LIBEVENT_LIBS="-levent_openssl $TOR_LIBEVENT_LIBS"
  520. fi
  521. fi
  522. AC_SUBST(TOR_LIBEVENT_LIBS)
  523. dnl ------------------------------------------------------
  524. dnl Where do you live, libm?
  525. dnl On some platforms (Haiku/BeOS) the math library is
  526. dnl part of libroot. In which case don't link against lm
  527. TOR_LIB_MATH=""
  528. save_LIBS="$LIBS"
  529. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  530. if test "$ac_cv_search_pow" != "none required"; then
  531. TOR_LIB_MATH="$ac_cv_search_pow"
  532. fi
  533. LIBS="$save_LIBS"
  534. AC_SUBST(TOR_LIB_MATH)
  535. dnl ------------------------------------------------------
  536. dnl Where do you live, openssl? And how do we call you?
  537. tor_openssl_pkg_redhat="openssl"
  538. tor_openssl_pkg_debian="libssl-dev"
  539. tor_openssl_devpkg_redhat="openssl-devel"
  540. tor_openssl_devpkg_debian="libssl-dev"
  541. ALT_openssl_WITHVAL=""
  542. AC_ARG_WITH(ssl-dir,
  543. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  544. [
  545. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  546. ALT_openssl_WITHVAL="$withval"
  547. fi
  548. ])
  549. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  550. [#include <openssl/rand.h>],
  551. [void RAND_add(const void *buf, int num, double entropy);],
  552. [RAND_add((void*)0,0,0);], [],
  553. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  554. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  555. if test "$enable_static_openssl" = "yes"; then
  556. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  557. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  558. else
  559. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  560. fi
  561. else
  562. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  563. fi
  564. AC_SUBST(TOR_OPENSSL_LIBS)
  565. dnl Now check for particular openssl functions.
  566. save_LIBS="$LIBS"
  567. save_LDFLAGS="$LDFLAGS"
  568. save_CPPFLAGS="$CPPFLAGS"
  569. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  570. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  571. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  572. AC_TRY_COMPILE([
  573. #include <openssl/opensslv.h>
  574. #if OPENSSL_VERSION_NUMBER < 0x1000000fL
  575. #error "too old"
  576. #endif
  577. ], [],
  578. [ : ],
  579. [ AC_ERROR([OpenSSL is too old. We require 1.0.0 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  580. AC_TRY_COMPILE([
  581. #include <openssl/opensslv.h>
  582. #include <openssl/evp.h>
  583. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  584. #error "no ECC"
  585. #endif
  586. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  587. #error "curves unavailable"
  588. #endif
  589. ], [],
  590. [ : ],
  591. [ AC_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  592. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  593. [#include <openssl/ssl.h>
  594. ])
  595. AC_CHECK_FUNCS([ \
  596. SSL_SESSION_get_master_key \
  597. SSL_get_server_random \
  598. SSL_get_client_ciphers \
  599. SSL_get_client_random \
  600. SSL_CIPHER_find \
  601. TLS_method
  602. ])
  603. dnl Check if OpenSSL has scrypt implementation.
  604. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  605. LIBS="$save_LIBS"
  606. LDFLAGS="$save_LDFLAGS"
  607. CPPFLAGS="$save_CPPFLAGS"
  608. dnl ------------------------------------------------------
  609. dnl Where do you live, zlib? And how do we call you?
  610. tor_zlib_pkg_redhat="zlib"
  611. tor_zlib_pkg_debian="zlib1g"
  612. tor_zlib_devpkg_redhat="zlib-devel"
  613. tor_zlib_devpkg_debian="zlib1g-dev"
  614. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  615. [#include <zlib.h>],
  616. [const char * zlibVersion(void);],
  617. [zlibVersion();], [--with-zlib-dir],
  618. [/opt/zlib])
  619. if test "$enable_static_zlib" = "yes"; then
  620. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  621. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  622. using --enable-static-zlib")
  623. else
  624. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  625. fi
  626. else
  627. TOR_ZLIB_LIBS="-lz"
  628. fi
  629. AC_SUBST(TOR_ZLIB_LIBS)
  630. dnl ----------------------------------------------------------------------
  631. dnl Check if libcap is available for capabilities.
  632. tor_cap_pkg_debian="libcap2"
  633. tor_cap_pkg_redhat="libcap"
  634. tor_cap_devpkg_debian="libcap-dev"
  635. tor_cap_devpkg_redhat="libcap-devel"
  636. AC_CHECK_LIB([cap], [cap_init], [],
  637. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  638. )
  639. AC_CHECK_FUNCS(cap_set_proc)
  640. dnl ---------------------------------------------------------------------
  641. dnl Now that we know about our major libraries, we can check for compiler
  642. dnl and linker hardening options. We need to do this with the libraries known,
  643. dnl since sometimes the linker will like an option but not be willing to
  644. dnl use it with a build of a library.
  645. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  646. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  647. CFLAGS_FTRAPV=
  648. CFLAGS_FWRAPV=
  649. CFLAGS_ASAN=
  650. CFLAGS_UBSAN=
  651. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  652. #if !defined(__clang__)
  653. #error
  654. #endif])], have_clang=yes, have_clang=no)
  655. if test "x$enable_gcc_hardening" != "xno"; then
  656. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  657. if test "x$have_clang" = "xyes"; then
  658. TOR_CHECK_CFLAGS(-Qunused-arguments)
  659. fi
  660. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  661. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  662. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  663. m4_ifdef([AS_VAR_IF],[
  664. AS_VAR_IF(can_compile, [yes],
  665. AS_VAR_IF(can_link, [yes],
  666. [],
  667. 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.)]))
  668. )])
  669. AS_VAR_POPDEF([can_link])
  670. AS_VAR_POPDEF([can_compile])
  671. TOR_CHECK_CFLAGS(-Wstack-protector)
  672. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  673. if test "$bwin32" = "false"; then
  674. TOR_CHECK_CFLAGS(-fPIE)
  675. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  676. fi
  677. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  678. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  679. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  680. AC_MSG_WARN([The compiler supports -ftrapv, but for some reason I was not able to link with -ftrapv. Are you missing run-time support? Run-time hardening will not work as well as it should.])
  681. fi
  682. fi
  683. if test "x$enable_expensive_hardening" = "xyes"; then
  684. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  685. AC_MSG_ERROR([You requested expensive hardening, but the compiler does not seem to support -ftrapv.])
  686. fi
  687. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  688. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  689. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  690. fi
  691. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  692. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  693. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  694. fi
  695. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  696. fi
  697. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  698. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  699. mulodi_fixes_ftrapv=no
  700. if test "$have_clang" = "yes"; then
  701. saved_CFLAGS="$CFLAGS"
  702. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  703. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  704. AC_LINK_IFELSE([
  705. AC_LANG_SOURCE([[
  706. #include <stdint.h>
  707. #include <stdlib.h>
  708. int main(int argc, char **argv)
  709. {
  710. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  711. * (int64_t)atoi(argv[3]);
  712. return x == 9;
  713. } ]])],
  714. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  715. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  716. if test "$ftrapv_can_link" = "no"; then
  717. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  718. AC_LINK_IFELSE([
  719. AC_LANG_SOURCE([[
  720. #include <stdint.h>
  721. #include <stdlib.h>
  722. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  723. *overflow=0;
  724. return a;
  725. }
  726. int main(int argc, char **argv)
  727. {
  728. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  729. * (int64_t)atoi(argv[3]);
  730. return x == 9;
  731. } ]])],
  732. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  733. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  734. fi
  735. CFLAGS="$saved_CFLAGS"
  736. fi
  737. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  738. dnl These cflags add bunches of branches, and we haven't been able to
  739. dnl persuade ourselves that they're suitable for code that needs to be
  740. dnl constant time.
  741. AC_SUBST(CFLAGS_BUGTRAP)
  742. dnl These cflags are variant ones sutable for code that needs to be
  743. dnl constant-time.
  744. AC_SUBST(CFLAGS_CONSTTIME)
  745. if test "x$enable_linker_hardening" != "xno"; then
  746. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  747. fi
  748. # For backtrace support
  749. TOR_CHECK_LDFLAGS(-rdynamic)
  750. dnl ------------------------------------------------------
  751. dnl Now see if we have a -fomit-frame-pointer compiler option.
  752. saved_CFLAGS="$CFLAGS"
  753. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  754. F_OMIT_FRAME_POINTER=''
  755. if test "$saved_CFLAGS" != "$CFLAGS"; then
  756. if test "x$enable_expensive_hardening" != "xyes"; then
  757. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  758. fi
  759. fi
  760. CFLAGS="$saved_CFLAGS"
  761. AC_SUBST(F_OMIT_FRAME_POINTER)
  762. dnl ------------------------------------------------------
  763. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  764. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  765. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  766. dnl code will work.
  767. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  768. dnl ============================================================
  769. dnl Check for libseccomp
  770. if test "x$enable_seccomp" != "xno"; then
  771. AC_CHECK_HEADERS([seccomp.h])
  772. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  773. fi
  774. dnl ============================================================
  775. dnl Check for libscrypt
  776. if test "x$enable_libscrypt" != "xno"; then
  777. AC_CHECK_HEADERS([libscrypt.h])
  778. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  779. AC_CHECK_FUNCS([libscrypt_scrypt])
  780. fi
  781. dnl ============================================================
  782. dnl We need an implementation of curve25519.
  783. dnl set these defaults.
  784. build_curve25519_donna=no
  785. build_curve25519_donna_c64=no
  786. use_curve25519_donna=no
  787. use_curve25519_nacl=no
  788. CURVE25519_LIBS=
  789. dnl The best choice is using curve25519-donna-c64, but that requires
  790. dnl that we
  791. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  792. tor_cv_can_use_curve25519_donna_c64,
  793. [AC_RUN_IFELSE(
  794. [AC_LANG_PROGRAM([dnl
  795. #include <stdint.h>
  796. typedef unsigned uint128_t __attribute__((mode(TI)));
  797. int func(uint64_t a, uint64_t b) {
  798. uint128_t c = ((uint128_t)a) * b;
  799. int ok = ((uint64_t)(c>>96)) == 522859 &&
  800. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  801. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  802. (((uint64_t)(c))&0xffffffffL) == 0;
  803. return ok;
  804. }
  805. ], [dnl
  806. int ok = func( ((uint64_t)2000000000) * 1000000000,
  807. ((uint64_t)1234567890) << 24);
  808. return !ok;
  809. ])],
  810. [tor_cv_can_use_curve25519_donna_c64=yes],
  811. [tor_cv_can_use_curve25519_donna_c64=no],
  812. [AC_LINK_IFELSE(
  813. [AC_LANG_PROGRAM([dnl
  814. #include <stdint.h>
  815. typedef unsigned uint128_t __attribute__((mode(TI)));
  816. int func(uint64_t a, uint64_t b) {
  817. uint128_t c = ((uint128_t)a) * b;
  818. int ok = ((uint64_t)(c>>96)) == 522859 &&
  819. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  820. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  821. (((uint64_t)(c))&0xffffffffL) == 0;
  822. return ok;
  823. }
  824. ], [dnl
  825. int ok = func( ((uint64_t)2000000000) * 1000000000,
  826. ((uint64_t)1234567890) << 24);
  827. return !ok;
  828. ])],
  829. [tor_cv_can_use_curve25519_donna_c64=cross],
  830. [tor_cv_can_use_curve25519_donna_c64=no])])])
  831. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  832. nacl/crypto_scalarmult_curve25519.h])
  833. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  834. tor_cv_can_use_curve25519_nacl,
  835. [tor_saved_LIBS="$LIBS"
  836. LIBS="$LIBS -lnacl"
  837. AC_LINK_IFELSE(
  838. [AC_LANG_PROGRAM([dnl
  839. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  840. #include <crypto_scalarmult_curve25519.h>
  841. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  842. #include <nacl/crypto_scalarmult_curve25519.h>
  843. #endif
  844. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  845. #error Hey, this is the reference implementation! That's not fast.
  846. #endif
  847. ], [
  848. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  849. ])], [tor_cv_can_use_curve25519_nacl=yes],
  850. [tor_cv_can_use_curve25519_nacl=no])
  851. LIBS="$tor_saved_LIBS" ])
  852. dnl Okay, now we need to figure out which one to actually use. Fall back
  853. dnl to curve25519-donna.c
  854. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  855. build_curve25519_donna_c64=yes
  856. use_curve25519_donna=yes
  857. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  858. use_curve25519_nacl=yes
  859. CURVE25519_LIBS=-lnacl
  860. else
  861. build_curve25519_donna=yes
  862. use_curve25519_donna=yes
  863. fi
  864. if test "x$use_curve25519_donna" = "xyes"; then
  865. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  866. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  867. fi
  868. if test "x$use_curve25519_nacl" = "xyes"; then
  869. AC_DEFINE(USE_CURVE25519_NACL, 1,
  870. [Defined if we should use a curve25519 from nacl])
  871. fi
  872. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  873. test "x$build_curve25519_donna" = "xyes")
  874. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  875. test "x$build_curve25519_donna_c64" = "xyes")
  876. AC_SUBST(CURVE25519_LIBS)
  877. dnl Make sure to enable support for large off_t if available.
  878. AC_SYS_LARGEFILE
  879. AC_CHECK_HEADERS([assert.h \
  880. errno.h \
  881. fcntl.h \
  882. signal.h \
  883. string.h \
  884. sys/capability.h \
  885. sys/fcntl.h \
  886. sys/stat.h \
  887. sys/time.h \
  888. sys/types.h \
  889. time.h \
  890. unistd.h \
  891. arpa/inet.h \
  892. crt_externs.h \
  893. execinfo.h \
  894. grp.h \
  895. ifaddrs.h \
  896. inttypes.h \
  897. limits.h \
  898. linux/types.h \
  899. machine/limits.h \
  900. malloc.h \
  901. malloc/malloc.h \
  902. malloc_np.h \
  903. netdb.h \
  904. netinet/in.h \
  905. netinet/in6.h \
  906. pwd.h \
  907. readpassphrase.h \
  908. stdint.h \
  909. sys/eventfd.h \
  910. sys/file.h \
  911. sys/ioctl.h \
  912. sys/limits.h \
  913. sys/mman.h \
  914. sys/param.h \
  915. sys/prctl.h \
  916. sys/resource.h \
  917. sys/select.h \
  918. sys/socket.h \
  919. sys/statvfs.h \
  920. sys/syscall.h \
  921. sys/sysctl.h \
  922. sys/syslimits.h \
  923. sys/time.h \
  924. sys/types.h \
  925. sys/un.h \
  926. sys/utime.h \
  927. sys/wait.h \
  928. syslog.h \
  929. utime.h])
  930. AC_CHECK_HEADERS(sys/param.h)
  931. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  932. [#ifdef HAVE_SYS_TYPES_H
  933. #include <sys/types.h>
  934. #endif
  935. #ifdef HAVE_SYS_SOCKET_H
  936. #include <sys/socket.h>
  937. #endif])
  938. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  939. [#ifdef HAVE_SYS_TYPES_H
  940. #include <sys/types.h>
  941. #endif
  942. #ifdef HAVE_SYS_SOCKET_H
  943. #include <sys/socket.h>
  944. #endif
  945. #ifdef HAVE_NET_IF_H
  946. #include <net/if.h>
  947. #endif
  948. #ifdef HAVE_NETINET_IN_H
  949. #include <netinet/in.h>
  950. #endif])
  951. AC_CHECK_HEADERS(linux/if.h,[],[],
  952. [
  953. #ifdef HAVE_SYS_SOCKET_H
  954. #include <sys/socket.h>
  955. #endif
  956. ])
  957. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  958. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  959. [#ifdef HAVE_SYS_TYPES_H
  960. #include <sys/types.h>
  961. #endif
  962. #ifdef HAVE_SYS_SOCKET_H
  963. #include <sys/socket.h>
  964. #endif
  965. #ifdef HAVE_LIMITS_H
  966. #include <limits.h>
  967. #endif
  968. #ifdef HAVE_LINUX_TYPES_H
  969. #include <linux/types.h>
  970. #endif
  971. #ifdef HAVE_NETINET_IN6_H
  972. #include <netinet/in6.h>
  973. #endif
  974. #ifdef HAVE_NETINET_IN_H
  975. #include <netinet/in.h>
  976. #endif])
  977. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  978. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  979. [#ifdef HAVE_SYS_TYPES_H
  980. #include <sys/types.h>
  981. #endif
  982. #ifdef HAVE_SYS_SOCKET_H
  983. #include <sys/socket.h>
  984. #endif
  985. #ifdef HAVE_LIMITS_H
  986. #include <limits.h>
  987. #endif
  988. #ifdef HAVE_LINUX_TYPES_H
  989. #include <linux/types.h>
  990. #endif
  991. #ifdef HAVE_NETINET_IN6_H
  992. #include <netinet/in6.h>
  993. #endif
  994. #ifdef HAVE_NETINET_IN_H
  995. #include <netinet/in.h>
  996. #endif
  997. #ifdef HAVE_LINUX_IF_H
  998. #include <linux/if.h>
  999. #endif])
  1000. if test "x$transparent" = "xtrue"; then
  1001. transparent_ok=0
  1002. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1003. transparent_ok=1
  1004. fi
  1005. if test "x$linux_netfilter_ipv4" = "x1"; then
  1006. transparent_ok=1
  1007. fi
  1008. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1009. transparent_ok=1
  1010. fi
  1011. if test "x$transparent_ok" = "x1"; then
  1012. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1013. case "$host" in
  1014. *-*-openbsd* | *-*-bitrig*)
  1015. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  1016. esac
  1017. else
  1018. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1019. fi
  1020. fi
  1021. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1022. [#ifdef HAVE_SYS_TYPES_H
  1023. #include <sys/types.h>
  1024. #endif
  1025. #ifdef HAVE_SYS_TIME_H
  1026. #include <sys/time.h>
  1027. #endif])
  1028. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1029. dnl Watch out.
  1030. AC_CHECK_SIZEOF(int8_t)
  1031. AC_CHECK_SIZEOF(int16_t)
  1032. AC_CHECK_SIZEOF(int32_t)
  1033. AC_CHECK_SIZEOF(int64_t)
  1034. AC_CHECK_SIZEOF(uint8_t)
  1035. AC_CHECK_SIZEOF(uint16_t)
  1036. AC_CHECK_SIZEOF(uint32_t)
  1037. AC_CHECK_SIZEOF(uint64_t)
  1038. AC_CHECK_SIZEOF(intptr_t)
  1039. AC_CHECK_SIZEOF(uintptr_t)
  1040. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1041. AC_CHECK_SIZEOF(char)
  1042. AC_CHECK_SIZEOF(short)
  1043. AC_CHECK_SIZEOF(int)
  1044. AC_CHECK_SIZEOF(long)
  1045. AC_CHECK_SIZEOF(long long)
  1046. AC_CHECK_SIZEOF(__int64)
  1047. AC_CHECK_SIZEOF(void *)
  1048. AC_CHECK_SIZEOF(time_t)
  1049. AC_CHECK_SIZEOF(size_t)
  1050. AC_CHECK_SIZEOF(pid_t)
  1051. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1052. AC_PC_FROM_UCONTEXT([:])
  1053. dnl used to include sockaddr_storage, but everybody has that.
  1054. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1055. [#ifdef HAVE_SYS_TYPES_H
  1056. #include <sys/types.h>
  1057. #endif
  1058. #ifdef HAVE_NETINET_IN_H
  1059. #include <netinet/in.h>
  1060. #endif
  1061. #ifdef HAVE_NETINET_IN6_H
  1062. #include <netinet/in6.h>
  1063. #endif
  1064. #ifdef HAVE_SYS_SOCKET_H
  1065. #include <sys/socket.h>
  1066. #endif
  1067. #ifdef _WIN32
  1068. #define _WIN32_WINNT 0x0501
  1069. #define WIN32_LEAN_AND_MEAN
  1070. #include <winsock2.h>
  1071. #include <ws2tcpip.h>
  1072. #endif
  1073. ])
  1074. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1075. [#ifdef HAVE_SYS_TYPES_H
  1076. #include <sys/types.h>
  1077. #endif
  1078. #ifdef HAVE_NETINET_IN_H
  1079. #include <netinet/in.h>
  1080. #endif
  1081. #ifdef HAVE_NETINET_IN6_H
  1082. #include <netinet/in6.h>
  1083. #endif
  1084. #ifdef HAVE_SYS_SOCKET_H
  1085. #include <sys/socket.h>
  1086. #endif
  1087. #ifdef _WIN32
  1088. #define _WIN32_WINNT 0x0501
  1089. #define WIN32_LEAN_AND_MEAN
  1090. #include <winsock2.h>
  1091. #include <ws2tcpip.h>
  1092. #endif
  1093. ])
  1094. AC_CHECK_TYPES([rlim_t], , ,
  1095. [#ifdef HAVE_SYS_TYPES_H
  1096. #include <sys/types.h>
  1097. #endif
  1098. #ifdef HAVE_SYS_TIME_H
  1099. #include <sys/time.h>
  1100. #endif
  1101. #ifdef HAVE_SYS_RESOURCE_H
  1102. #include <sys/resource.h>
  1103. #endif
  1104. ])
  1105. AX_CHECK_SIGN([time_t],
  1106. [ : ],
  1107. [ : ], [
  1108. #ifdef HAVE_SYS_TYPES_H
  1109. #include <sys/types.h>
  1110. #endif
  1111. #ifdef HAVE_SYS_TIME_H
  1112. #include <sys/time.h>
  1113. #endif
  1114. #ifdef HAVE_TIME_H
  1115. #include <time.h>
  1116. #endif
  1117. ])
  1118. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1119. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1120. fi
  1121. AX_CHECK_SIGN([size_t],
  1122. [ tor_cv_size_t_signed=yes ],
  1123. [ tor_cv_size_t_signed=no ], [
  1124. #ifdef HAVE_SYS_TYPES_H
  1125. #include <sys/types.h>
  1126. #endif
  1127. ])
  1128. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1129. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1130. fi
  1131. AX_CHECK_SIGN([enum always],
  1132. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1133. [ : ], [
  1134. enum always { AAA, BBB, CCC };
  1135. ])
  1136. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1137. #ifdef HAVE_SYS_SOCKET_H
  1138. #include <sys/socket.h>
  1139. #endif
  1140. ])
  1141. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1142. AC_CHECK_SIZEOF(cell_t)
  1143. # Now make sure that NULL can be represented as zero bytes.
  1144. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1145. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1146. [[#include <stdlib.h>
  1147. #include <string.h>
  1148. #include <stdio.h>
  1149. #ifdef HAVE_STDDEF_H
  1150. #include <stddef.h>
  1151. #endif
  1152. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1153. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1154. [tor_cv_null_is_zero=yes],
  1155. [tor_cv_null_is_zero=no],
  1156. [tor_cv_null_is_zero=cross])])
  1157. if test "$tor_cv_null_is_zero" = "cross"; then
  1158. # Cross-compiling; let's hope that the target isn't raving mad.
  1159. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1160. fi
  1161. if test "$tor_cv_null_is_zero" != "no"; then
  1162. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1163. [Define to 1 iff memset(0) sets pointers to NULL])
  1164. fi
  1165. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1166. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1167. [[#include <stdlib.h>
  1168. #include <string.h>
  1169. #include <stdio.h>
  1170. #ifdef HAVE_STDDEF_H
  1171. #include <stddef.h>
  1172. #endif
  1173. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1174. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1175. [tor_cv_dbl0_is_zero=yes],
  1176. [tor_cv_dbl0_is_zero=no],
  1177. [tor_cv_dbl0_is_zero=cross])])
  1178. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1179. # Cross-compiling; let's hope that the target isn't raving mad.
  1180. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1181. fi
  1182. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1183. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1184. [Define to 1 iff memset(0) sets doubles to 0.0])
  1185. fi
  1186. # And what happens when we malloc zero?
  1187. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1188. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1189. [[#include <stdlib.h>
  1190. #include <string.h>
  1191. #include <stdio.h>
  1192. #ifdef HAVE_STDDEF_H
  1193. #include <stddef.h>
  1194. #endif
  1195. int main () { return malloc(0)?0:1; }]])],
  1196. [tor_cv_malloc_zero_works=yes],
  1197. [tor_cv_malloc_zero_works=no],
  1198. [tor_cv_malloc_zero_works=cross])])
  1199. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1200. # Cross-compiling; let's hope that the target isn't raving mad.
  1201. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1202. fi
  1203. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1204. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1205. [Define to 1 iff malloc(0) returns a pointer])
  1206. fi
  1207. # whether we seem to be in a 2s-complement world.
  1208. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1209. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1210. [[int main () { int problem = ((-99) != (~99)+1);
  1211. return problem ? 1 : 0; }]])],
  1212. [tor_cv_twos_complement=yes],
  1213. [tor_cv_twos_complement=no],
  1214. [tor_cv_twos_complement=cross])])
  1215. if test "$tor_cv_twos_complement" = "cross"; then
  1216. # Cross-compiling; let's hope that the target isn't raving mad.
  1217. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1218. fi
  1219. if test "$tor_cv_twos_complement" != "no"; then
  1220. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1221. [Define to 1 iff we represent negative integers with
  1222. two's complement])
  1223. fi
  1224. # What does shifting a negative value do?
  1225. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1226. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1227. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1228. [tor_cv_sign_extend=yes],
  1229. [tor_cv_sign_extend=no],
  1230. [tor_cv_sign_extend=cross])])
  1231. if test "$tor_cv_sign_extend" = "cross"; then
  1232. # Cross-compiling; let's hope that the target isn't raving mad.
  1233. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1234. fi
  1235. if test "$tor_cv_sign_extend" != "no"; then
  1236. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1237. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1238. fi
  1239. # Whether we should use the dmalloc memory allocation debugging library.
  1240. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1241. AC_ARG_WITH(dmalloc,
  1242. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1243. [if [[ "$withval" = "yes" ]]; then
  1244. dmalloc=1
  1245. AC_MSG_RESULT(yes)
  1246. else
  1247. dmalloc=1
  1248. AC_MSG_RESULT(no)
  1249. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1250. )
  1251. if [[ $dmalloc -eq 1 ]]; then
  1252. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1253. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1254. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1255. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1256. fi
  1257. AC_ARG_WITH(tcmalloc,
  1258. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1259. [ tcmalloc=yes ], [ tcmalloc=no ])
  1260. if test "x$tcmalloc" = "xyes"; then
  1261. LDFLAGS="-ltcmalloc $LDFLAGS"
  1262. fi
  1263. using_custom_malloc=no
  1264. if test "x$enable_openbsd_malloc" = "xyes"; then
  1265. using_custom_malloc=yes
  1266. fi
  1267. if test "x$tcmalloc" = "xyes"; then
  1268. using_custom_malloc=yes
  1269. fi
  1270. if test "$using_custom_malloc" = "no"; then
  1271. AC_CHECK_FUNCS(mallinfo)
  1272. fi
  1273. # By default, we're going to assume we don't have mlockall()
  1274. # bionic and other platforms have various broken mlockall subsystems.
  1275. # Some systems don't have a working mlockall, some aren't linkable,
  1276. # and some have it but don't declare it.
  1277. AC_CHECK_FUNCS(mlockall)
  1278. AC_CHECK_DECLS([mlockall], , , [
  1279. #ifdef HAVE_SYS_MMAN_H
  1280. #include <sys/mman.h>
  1281. #endif])
  1282. # Allow user to specify an alternate syslog facility
  1283. AC_ARG_WITH(syslog-facility,
  1284. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1285. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1286. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1287. AC_SUBST(LOGFACILITY)
  1288. # Check if we have getresuid and getresgid
  1289. AC_CHECK_FUNCS(getresuid getresgid)
  1290. # Check for gethostbyname_r in all its glorious incompatible versions.
  1291. # (This logic is based on that in Python's configure.in)
  1292. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1293. [Define this if you have any gethostbyname_r()])
  1294. AC_CHECK_FUNC(gethostbyname_r, [
  1295. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1296. OLD_CFLAGS=$CFLAGS
  1297. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1298. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1299. #include <netdb.h>
  1300. ], [[
  1301. char *cp1, *cp2;
  1302. struct hostent *h1, *h2;
  1303. int i1, i2;
  1304. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1305. ]])],[
  1306. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1307. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1308. [Define this if gethostbyname_r takes 6 arguments])
  1309. AC_MSG_RESULT(6)
  1310. ], [
  1311. AC_TRY_COMPILE([
  1312. #include <netdb.h>
  1313. ], [
  1314. char *cp1, *cp2;
  1315. struct hostent *h1;
  1316. int i1, i2;
  1317. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1318. ], [
  1319. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1320. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1321. [Define this if gethostbyname_r takes 5 arguments])
  1322. AC_MSG_RESULT(5)
  1323. ], [
  1324. AC_TRY_COMPILE([
  1325. #include <netdb.h>
  1326. ], [
  1327. char *cp1;
  1328. struct hostent *h1;
  1329. struct hostent_data hd;
  1330. (void) gethostbyname_r(cp1,h1,&hd);
  1331. ], [
  1332. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1333. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1334. [Define this if gethostbyname_r takes 3 arguments])
  1335. AC_MSG_RESULT(3)
  1336. ], [
  1337. AC_MSG_RESULT(0)
  1338. ])
  1339. ])
  1340. ])
  1341. CFLAGS=$OLD_CFLAGS
  1342. ])
  1343. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1344. tor_cv_have_func_macro,
  1345. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1346. #include <stdio.h>
  1347. int main(int c, char **v) { puts(__func__); }])],
  1348. tor_cv_have_func_macro=yes,
  1349. tor_cv_have_func_macro=no))
  1350. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1351. tor_cv_have_FUNC_macro,
  1352. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1353. #include <stdio.h>
  1354. int main(int c, char **v) { puts(__FUNC__); }])],
  1355. tor_cv_have_FUNC_macro=yes,
  1356. tor_cv_have_FUNC_macro=no))
  1357. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1358. tor_cv_have_FUNCTION_macro,
  1359. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1360. #include <stdio.h>
  1361. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1362. tor_cv_have_FUNCTION_macro=yes,
  1363. tor_cv_have_FUNCTION_macro=no))
  1364. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1365. tor_cv_have_environ_declared,
  1366. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1367. /* We define _GNU_SOURCE here because it is also defined in compat.c.
  1368. * Without it environ doesn't get declared. */
  1369. #define _GNU_SOURCE
  1370. #ifdef HAVE_UNISTD_H
  1371. #include <unistd.h>
  1372. #endif
  1373. #include <stdlib.h>
  1374. int main(int c, char **v) { char **t = environ; }])],
  1375. tor_cv_have_environ_declared=yes,
  1376. tor_cv_have_environ_declared=no))
  1377. if test "$tor_cv_have_func_macro" = "yes"; then
  1378. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1379. fi
  1380. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1381. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1382. fi
  1383. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1384. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1385. [Defined if the compiler supports __FUNCTION__])
  1386. fi
  1387. if test "$tor_cv_have_environ_declared" = "yes"; then
  1388. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1389. [Defined if we have extern char **environ already declared])
  1390. fi
  1391. # $prefix stores the value of the --prefix command line option, or
  1392. # NONE if the option wasn't set. In the case that it wasn't set, make
  1393. # it be the default, so that we can use it to expand directories now.
  1394. if test "x$prefix" = "xNONE"; then
  1395. prefix=$ac_default_prefix
  1396. fi
  1397. # and similarly for $exec_prefix
  1398. if test "x$exec_prefix" = "xNONE"; then
  1399. exec_prefix=$prefix
  1400. fi
  1401. if test "x$BUILDDIR" = "x"; then
  1402. BUILDDIR=`pwd`
  1403. fi
  1404. AC_SUBST(BUILDDIR)
  1405. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1406. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1407. if test "x$CONFDIR" = "x"; then
  1408. CONFDIR=`eval echo $sysconfdir/tor`
  1409. fi
  1410. AC_SUBST(CONFDIR)
  1411. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1412. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1413. BINDIR=`eval echo $bindir`
  1414. AC_SUBST(BINDIR)
  1415. LOCALSTATEDIR=`eval echo $localstatedir`
  1416. AC_SUBST(LOCALSTATEDIR)
  1417. if test "$bwin32" = "true"; then
  1418. # Test if the linker supports the --nxcompat and --dynamicbase options
  1419. # for Windows
  1420. save_LDFLAGS="$LDFLAGS"
  1421. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1422. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1423. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1424. [AC_MSG_RESULT([yes])]
  1425. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1426. [AC_MSG_RESULT([no])]
  1427. )
  1428. LDFLAGS="$save_LDFLAGS"
  1429. fi
  1430. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1431. # than autoconf's macros like.
  1432. if test "$GCC" = "yes"; then
  1433. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1434. # accident waiting to happen.
  1435. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1436. else
  1437. # Override optimization level for non-gcc compilers
  1438. CFLAGS="$CFLAGS -O"
  1439. enable_gcc_warnings=no
  1440. enable_gcc_warnings_advisory=no
  1441. fi
  1442. # Warnings implies advisory-warnings and -Werror.
  1443. if test "$enable_gcc_warnings" = "yes"; then
  1444. enable_gcc_warnings_advisory=yes
  1445. enable_fatal_warnings=yes
  1446. fi
  1447. # OS X Lion started deprecating the system openssl. Let's just disable
  1448. # all deprecation warnings on OS X. Also, to potentially make the binary
  1449. # a little smaller, let's enable dead_strip.
  1450. case "$host_os" in
  1451. darwin*)
  1452. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1453. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1454. esac
  1455. # Add some more warnings which we use in development but not in the
  1456. # released versions. (Some relevant gcc versions can't handle these.)
  1457. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1458. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1459. #if !defined(__GNUC__) || (__GNUC__ < 4)
  1460. #error
  1461. #endif])], have_gcc4=yes, have_gcc4=no)
  1462. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1463. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)
  1464. #error
  1465. #endif])], have_gcc42=yes, have_gcc42=no)
  1466. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1467. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
  1468. #error
  1469. #endif])], have_gcc43=yes, have_gcc43=no)
  1470. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1471. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)
  1472. #error
  1473. #endif])], have_gcc46=yes, have_gcc46=no)
  1474. save_CFLAGS="$CFLAGS"
  1475. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1476. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], have_shorten64_flag=yes,
  1477. have_shorten64_flag=no)
  1478. CFLAGS="$save_CFLAGS"
  1479. case "$host" in
  1480. *-*-openbsd* | *-*-bitrig*)
  1481. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1482. # That's fine, except that the headers don't pass -Wredundant-decls.
  1483. # Therefore, let's disable -Wsystem-headers when we're building
  1484. # with maximal warnings on OpenBSD.
  1485. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1486. esac
  1487. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1488. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1489. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1490. CFLAGS="$CFLAGS -Wwrite-strings -Wmissing-declarations -Wredundant-decls"
  1491. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1492. # Disabled, so we can use mallinfo(): -Waggregate-return
  1493. if test "x$have_gcc4" = "xyes"; then
  1494. # These warnings break gcc 3.3.5 and work on gcc 4.0.2
  1495. CFLAGS="$CFLAGS -Winit-self -Wmissing-field-initializers -Wold-style-definition"
  1496. fi
  1497. if test "x$have_gcc42" = "xyes"; then
  1498. # These warnings break gcc 4.0.2 and work on gcc 4.2
  1499. CFLAGS="$CFLAGS -Waddress -Wmissing-noreturn -Wstrict-overflow=1"
  1500. # We used to use -Wstrict-overflow=5, but that breaks us heavily under 4.3.
  1501. fi
  1502. if test "x$have_gcc42" = "xyes" && test "x$have_clang" = "xno"; then
  1503. # These warnings break gcc 4.0.2 and clang, but work on gcc 4.2
  1504. CFLAGS="$CFLAGS -Wnormalized=id -Woverride-init"
  1505. fi
  1506. if test "x$have_gcc43" = "xyes"; then
  1507. # These warnings break gcc 4.2 and work on gcc 4.3
  1508. CFLAGS="$CFLAGS -Wextra -Warray-bounds"
  1509. fi
  1510. if test "x$have_gcc46" = "xyes"; then
  1511. # This warning was added in gcc 4.3, but it appears to generate
  1512. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1513. CFLAGS="$CFLAGS -Wlogical-op"
  1514. fi
  1515. if test "x$have_shorten64_flag" = "xyes"; then
  1516. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1517. fi
  1518. if test "x$enable_fatal_warnings" = "xyes"; then
  1519. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1520. # default autoconf programs are full of errors.
  1521. CFLAGS="$CFLAGS -Werror"
  1522. fi
  1523. ##This will break the world on some 64-bit architectures
  1524. # CFLAGS="$CFLAGS -Winline"
  1525. fi
  1526. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1527. case "$host_os" in
  1528. darwin*)
  1529. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-profiling.])
  1530. esac
  1531. fi
  1532. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1533. AC_CONFIG_FILES([
  1534. Doxyfile
  1535. Makefile
  1536. contrib/dist/suse/tor.sh
  1537. contrib/operator-tools/tor.logrotate
  1538. contrib/dist/tor.sh
  1539. contrib/dist/torctl
  1540. contrib/dist/tor.service
  1541. src/config/torrc.sample
  1542. src/config/torrc.minimal
  1543. scripts/maint/checkOptionDocs.pl
  1544. scripts/maint/updateVersions.pl
  1545. ])
  1546. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1547. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1548. for file in $regular_mans ; do
  1549. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1550. echo "==================================";
  1551. echo;
  1552. echo "Building Tor has failed since manpages cannot be built.";
  1553. echo;
  1554. echo "You need asciidoc installed to be able to build the manpages.";
  1555. echo "To build without manpages, use the --disable-asciidoc argument";
  1556. echo "when calling configure.";
  1557. echo;
  1558. echo "==================================";
  1559. exit 1;
  1560. fi
  1561. done
  1562. fi
  1563. AC_OUTPUT