configure.ac 52 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_INIT([tor],[0.2.8.1-alpha])
  6. AC_CONFIG_SRCDIR([src/or/main.c])
  7. AC_CONFIG_MACRO_DIR([m4])
  8. AM_INIT_AUTOMAKE
  9. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  10. AC_CONFIG_HEADERS([orconfig.h])
  11. AC_CANONICAL_HOST
  12. PKG_PROG_PKG_CONFIG
  13. if test -f /etc/redhat-release ; then
  14. if test -f /usr/kerberos/include ; then
  15. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  16. fi
  17. fi
  18. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  19. # the += operator on it in src/or/Makefile.am
  20. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  21. #XXXX020 We should make these enabled or not, before 0.2.0.x-final
  22. AC_ARG_ENABLE(openbsd-malloc,
  23. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  24. AC_ARG_ENABLE(instrument-downloads,
  25. AS_HELP_STRING(--enable-instrument-downloads, [instrument downloads of directory resources etc.]))
  26. AC_ARG_ENABLE(static-openssl,
  27. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  28. AC_ARG_ENABLE(static-libevent,
  29. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  30. AC_ARG_ENABLE(static-zlib,
  31. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  32. AC_ARG_ENABLE(static-tor,
  33. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  34. AC_ARG_ENABLE(unittests,
  35. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  36. AC_ARG_ENABLE(coverage,
  37. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  38. AC_ARG_ENABLE(asserts-in-tests,
  39. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  40. AC_ARG_ENABLE(system-torrc,
  41. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  42. if test x$enable_coverage != xyes -a x$enable_asserts_in_tests = xno ; then
  43. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  44. fi
  45. AM_CONDITIONAL(UNITTESTS_ENABLED, test x$enable_unittests != xno)
  46. AM_CONDITIONAL(COVERAGE_ENABLED, test x$enable_coverage = xyes)
  47. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test x$enable_asserts_in_tests = xno)
  48. if test "$enable_static_tor" = "yes"; then
  49. enable_static_libevent="yes";
  50. enable_static_openssl="yes";
  51. enable_static_zlib="yes";
  52. CFLAGS="$CFLAGS -static"
  53. fi
  54. if test "$enable_system_torrc" = "no"; then
  55. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  56. [Defined if we're not going to look for a torrc in SYSCONF])
  57. fi
  58. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test x$enable_openbsd_malloc = xyes)
  59. if test x$enable_instrument_downloads = xyes; then
  60. AC_DEFINE(INSTRUMENT_DOWNLOADS, 1,
  61. [Defined if we want to keep track of how much of each kind of resource we download.])
  62. fi
  63. AC_ARG_ENABLE(transparent,
  64. AS_HELP_STRING(--disable-transparent, [disable transparent proxy support]),
  65. [case "${enableval}" in
  66. yes) transparent=true ;;
  67. no) transparent=false ;;
  68. *) AC_MSG_ERROR(bad value for --enable-transparent) ;;
  69. esac], [transparent=true])
  70. AC_ARG_ENABLE(asciidoc,
  71. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  72. [case "${enableval}" in
  73. yes) asciidoc=true ;;
  74. no) asciidoc=false ;;
  75. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  76. esac], [asciidoc=true])
  77. # systemd notify support
  78. AC_ARG_ENABLE(systemd,
  79. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  80. [case "${enableval}" in
  81. yes) systemd=true ;;
  82. no) systemd=false ;;
  83. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  84. esac], [systemd=auto])
  85. # systemd support
  86. if test x$enable_systemd = xno ; then
  87. have_systemd=no;
  88. else
  89. PKG_CHECK_MODULES(SYSTEMD,
  90. [libsystemd-daemon],
  91. have_systemd=yes,
  92. have_systemd=no)
  93. if test x$have_systemd=xno; then
  94. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  95. PKG_CHECK_MODULES(SYSTEMD,
  96. [libsystemd],
  97. have_systemd=yes,
  98. have_systemd=no)
  99. fi
  100. fi
  101. if test x$have_systemd = xyes; then
  102. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  103. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  104. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  105. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  106. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  107. fi
  108. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  109. AC_SUBST(TOR_SYSTEMD_LIBS)
  110. if test x$enable_systemd = xyes -a x$have_systemd != xyes ; then
  111. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  112. fi
  113. case $host in
  114. *-*-solaris* )
  115. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  116. ;;
  117. esac
  118. AC_ARG_ENABLE(gcc-warnings,
  119. AS_HELP_STRING(--enable-gcc-warnings, [enable verbose warnings]))
  120. AC_ARG_ENABLE(gcc-warnings-advisory,
  121. AS_HELP_STRING(--enable-gcc-warnings-advisory, [enable verbose warnings, excluding -Werror]))
  122. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  123. AC_ARG_ENABLE(gcc-hardening,
  124. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  125. AC_ARG_ENABLE(expensive-hardening,
  126. AS_HELP_STRING(--enable-expensive-hardening, [enable more expensive compiler hardening; makes Tor slower]))
  127. dnl Linker hardening options
  128. dnl Currently these options are ELF specific - you can't use this with MacOSX
  129. AC_ARG_ENABLE(linker-hardening,
  130. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  131. AC_ARG_ENABLE(local-appdata,
  132. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  133. if test "$enable_local_appdata" = "yes"; then
  134. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  135. [Defined if we default to host local appdata paths on Windows])
  136. fi
  137. # Tor2web mode flag
  138. AC_ARG_ENABLE(tor2web-mode,
  139. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  140. [if test x$enableval = xyes; then
  141. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  142. fi])
  143. AC_ARG_ENABLE(bufferevents,
  144. AS_HELP_STRING(--enable-bufferevents, [use Libevent's buffered IO]))
  145. AC_ARG_ENABLE(tool-name-check,
  146. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  147. AC_ARG_ENABLE(seccomp,
  148. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  149. AC_ARG_ENABLE(libscrypt,
  150. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  151. dnl check for the correct "ar" when cross-compiling
  152. AN_MAKEVAR([AR], [AC_PROG_AR])
  153. AN_PROGRAM([ar], [AC_PROG_AR])
  154. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [ar])])
  155. AC_PROG_AR
  156. dnl Check whether the above macro has settled for a simply named tool even
  157. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  158. dnl because that will find any cc on the system, not only the cross-compiler,
  159. dnl and then verify that a binary built with this compiler runs on the
  160. dnl build system. It will then come to the false conclusion that we're not
  161. dnl cross-compiling.
  162. if test x$enable_tool_name_check != xno; then
  163. if test x$ac_tool_warned = xyes; then
  164. 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.)])
  165. elif test "x$ac_ct_AR" != x -a x$cross_compiling = xmaybe; then
  166. 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.)])
  167. fi
  168. fi
  169. AC_PROG_CC
  170. AC_PROG_CPP
  171. AC_PROG_MAKE_SET
  172. AC_PROG_RANLIB
  173. AC_PATH_PROG([PERL], [perl])
  174. dnl autoconf 2.59 appears not to support AC_PROG_SED
  175. AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
  176. dnl check for asciidoc and a2x
  177. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  178. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  179. AM_CONDITIONAL(USE_ASCIIDOC, test x$asciidoc = xtrue)
  180. AM_CONDITIONAL(USE_FW_HELPER, test x$natpmp = xtrue || test x$upnp = xtrue)
  181. AM_CONDITIONAL(NAT_PMP, test x$natpmp = xtrue)
  182. AM_CONDITIONAL(MINIUPNPC, test x$upnp = xtrue)
  183. AM_PROG_CC_C_O
  184. AC_PROG_CC_C99
  185. AC_ARG_VAR([PYTHON], [path to Python binary])
  186. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  187. if test "x$PYTHON" = "x"; then
  188. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  189. fi
  190. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  191. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  192. AC_C_FLEXIBLE_ARRAY_MEMBER
  193. ], [
  194. dnl Maybe we've got an old autoconf...
  195. AC_CACHE_CHECK([for flexible array members],
  196. tor_cv_c_flexarray,
  197. [AC_COMPILE_IFELSE(
  198. AC_LANG_PROGRAM([
  199. struct abc { int a; char b[]; };
  200. ], [
  201. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  202. def->b[0] = 33;
  203. ]),
  204. [tor_cv_c_flexarray=yes],
  205. [tor_cv_c_flexarray=no])])
  206. if test $tor_cv_flexarray = yes ; then
  207. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  208. else
  209. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  210. fi
  211. ])
  212. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  213. tor_cv_c_c99_decl,
  214. [AC_COMPILE_IFELSE(
  215. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  216. [tor_cv_c_c99_decl=yes],
  217. [tor_cv_c_c99_decl=no] )])
  218. if test "$tor_cv_c_c99_decl" != "yes"; then
  219. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  220. fi
  221. AC_CACHE_CHECK([for working C99 designated initializers],
  222. tor_cv_c_c99_designated_init,
  223. [AC_COMPILE_IFELSE(
  224. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  225. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  226. [tor_cv_c_c99_designated_init=yes],
  227. [tor_cv_c_c99_designated_init=no] )])
  228. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  229. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  230. fi
  231. TORUSER=_tor
  232. AC_ARG_WITH(tor-user,
  233. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  234. [
  235. TORUSER=$withval
  236. ]
  237. )
  238. AC_SUBST(TORUSER)
  239. TORGROUP=_tor
  240. AC_ARG_WITH(tor-group,
  241. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  242. [
  243. TORGROUP=$withval
  244. ]
  245. )
  246. AC_SUBST(TORGROUP)
  247. dnl If _WIN32 is defined and non-zero, we are building for win32
  248. AC_MSG_CHECKING([for win32])
  249. AC_RUN_IFELSE([AC_LANG_SOURCE([
  250. int main(int c, char **v) {
  251. #ifdef _WIN32
  252. #if _WIN32
  253. return 0;
  254. #else
  255. return 1;
  256. #endif
  257. #else
  258. return 2;
  259. #endif
  260. }])],
  261. bwin32=true; AC_MSG_RESULT([yes]),
  262. bwin32=false; AC_MSG_RESULT([no]),
  263. bwin32=cross; AC_MSG_RESULT([cross])
  264. )
  265. if test "$bwin32" = cross; then
  266. AC_MSG_CHECKING([for win32 (cross)])
  267. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  268. #ifdef _WIN32
  269. int main(int c, char **v) {return 0;}
  270. #else
  271. #error
  272. int main(int c, char **v) {return x(y);}
  273. #endif
  274. ])],
  275. bwin32=true; AC_MSG_RESULT([yes]),
  276. bwin32=false; AC_MSG_RESULT([no]))
  277. fi
  278. AH_BOTTOM([
  279. #ifdef _WIN32
  280. /* Defined to access windows functions and definitions for >=WinXP */
  281. # ifndef WINVER
  282. # define WINVER 0x0501
  283. # endif
  284. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  285. # ifndef _WIN32_WINNT
  286. # define _WIN32_WINNT 0x0501
  287. # endif
  288. /* Defined to avoid including some windows headers as part of Windows.h */
  289. # ifndef WIN32_LEAN_AND_MEAN
  290. # define WIN32_LEAN_AND_MEAN 1
  291. # endif
  292. #endif
  293. ])
  294. AM_CONDITIONAL(BUILD_NT_SERVICES, test x$bwin32 = xtrue)
  295. dnl Enable C99 when compiling with MIPSpro
  296. AC_MSG_CHECKING([for MIPSpro compiler])
  297. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  298. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  299. #error
  300. return x(y);
  301. #endif
  302. ])],
  303. bmipspro=false; AC_MSG_RESULT(no),
  304. bmipspro=true; AC_MSG_RESULT(yes))
  305. if test "$bmipspro" = true; then
  306. CFLAGS="$CFLAGS -c99"
  307. fi
  308. AC_C_BIGENDIAN
  309. AC_SEARCH_LIBS(socket, [socket network])
  310. AC_SEARCH_LIBS(gethostbyname, [nsl])
  311. AC_SEARCH_LIBS(dlopen, [dl])
  312. AC_SEARCH_LIBS(inet_aton, [resolv])
  313. AC_SEARCH_LIBS(backtrace, [execinfo])
  314. saved_LIBS="$LIBS"
  315. AC_SEARCH_LIBS([clock_gettime], [rt])
  316. if test "$LIBS" != "$saved_LIBS"; then
  317. # Looks like we need -lrt for clock_gettime().
  318. have_rt=yes
  319. fi
  320. AC_SEARCH_LIBS(pthread_create, [pthread])
  321. AC_SEARCH_LIBS(pthread_detach, [pthread])
  322. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  323. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  324. AC_CHECK_FUNCS(
  325. _NSGetEnviron \
  326. RtlSecureZeroMemory \
  327. SecureZeroMemory \
  328. accept4 \
  329. backtrace \
  330. backtrace_symbols_fd \
  331. clock_gettime \
  332. eventfd \
  333. explicit_bzero \
  334. timingsafe_memcmp \
  335. flock \
  336. ftime \
  337. getaddrinfo \
  338. getentropy \
  339. getifaddrs \
  340. getpass \
  341. getrlimit \
  342. gettimeofday \
  343. gmtime_r \
  344. htonll \
  345. inet_aton \
  346. ioctl \
  347. issetugid \
  348. llround \
  349. localtime_r \
  350. lround \
  351. memmem \
  352. memset_s \
  353. pipe \
  354. pipe2 \
  355. prctl \
  356. readpassphrase \
  357. rint \
  358. sigaction \
  359. socketpair \
  360. statvfs \
  361. strlcat \
  362. strlcpy \
  363. strnlen \
  364. strptime \
  365. strtok_r \
  366. strtoull \
  367. sysconf \
  368. sysctl \
  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, test x$ac_cv_func_readpassphrase = xno && test $bwin32 = false)
  387. dnl ------------------------------------------------------
  388. dnl Where do you live, libevent? And how do we call you?
  389. if test "$bwin32" = true; then
  390. TOR_LIB_WS32=-lws2_32
  391. TOR_LIB_IPHLPAPI=-liphlpapi
  392. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  393. # think it's actually necessary.
  394. TOR_LIB_GDI=-lgdi32
  395. else
  396. TOR_LIB_WS32=
  397. TOR_LIB_GDI=
  398. fi
  399. AC_SUBST(TOR_LIB_WS32)
  400. AC_SUBST(TOR_LIB_GDI)
  401. AC_SUBST(TOR_LIB_IPHLPAPI)
  402. tor_libevent_pkg_redhat="libevent"
  403. tor_libevent_pkg_debian="libevent-dev"
  404. tor_libevent_devpkg_redhat="libevent-devel"
  405. tor_libevent_devpkg_debian="libevent-dev"
  406. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  407. dnl linking for static builds.
  408. STATIC_LIBEVENT_FLAGS=""
  409. if test "$enable_static_libevent" = "yes"; then
  410. if test "$have_rt" = yes; then
  411. STATIC_LIBEVENT_FLAGS=" -lrt "
  412. fi
  413. fi
  414. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  415. #ifdef _WIN32
  416. #include <winsock2.h>
  417. #endif
  418. #include <stdlib.h>
  419. #include <sys/time.h>
  420. #include <sys/types.h>
  421. #include <event.h>], [
  422. #ifdef _WIN32
  423. #include <winsock2.h>
  424. #endif
  425. void exit(int); void *event_init(void);],
  426. [
  427. #ifdef _WIN32
  428. {WSADATA d; WSAStartup(0x101,&d); }
  429. #endif
  430. event_init(); exit(0);
  431. ], [--with-libevent-dir], [/opt/libevent])
  432. dnl Now check for particular libevent functions.
  433. save_LIBS="$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 $save_LIBS"
  448. AM_CONDITIONAL(USE_EXTERNAL_EVDNS, test x$ac_cv_header_event2_dns_h = xyes)
  449. if test "$enable_static_libevent" = "yes"; then
  450. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  451. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  452. else
  453. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  454. fi
  455. else
  456. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  457. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  458. 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"))
  459. if test "$ac_cv_search_event_new" != "none required"; then
  460. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  461. fi
  462. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  463. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  464. fi
  465. else
  466. TOR_LIBEVENT_LIBS="-levent"
  467. fi
  468. fi
  469. LIBS="$save_LIBS"
  470. LDFLAGS="$save_LDFLAGS"
  471. CPPFLAGS="$save_CPPFLAGS"
  472. dnl This isn't the best test for Libevent 2.0.3-alpha. Once it's released,
  473. dnl we can do much better.
  474. if test "$enable_bufferevents" = "yes" ; then
  475. if test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes" ; then
  476. 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.])
  477. else
  478. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  479. # Check for the right version. First see if version detection works.
  480. AC_MSG_CHECKING([whether we can detect the Libevent version])
  481. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  482. #include <event2/event.h>
  483. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 10
  484. #error
  485. int x = y(zz);
  486. #else
  487. int x = 1;
  488. #endif
  489. ])], [event_version_number_works=yes; AC_MSG_RESULT([yes]) ],
  490. [event_version_number_works=no; AC_MSG_RESULT([no])])
  491. if test "$event_version_number_works" != 'yes'; then
  492. AC_MSG_WARN([Version detection on Libevent seems broken. Your Libevent installation is probably screwed up or very old.])
  493. else
  494. AC_MSG_CHECKING([whether Libevent is new enough for bufferevents])
  495. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  496. #include <event2/event.h>
  497. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000d00
  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 does not seem new enough to support bufferevents. We require 2.0.13-stable or later]) ] )
  506. fi
  507. fi
  508. fi
  509. LIBS="$save_LIBS"
  510. LDFLAGS="$save_LDFLAGS"
  511. CPPFLAGS="$save_CPPFLAGS"
  512. AM_CONDITIONAL(USE_BUFFEREVENTS, test "$enable_bufferevents" = "yes")
  513. if test "$enable_bufferevents" = "yes"; then
  514. AC_DEFINE(USE_BUFFEREVENTS, 1, [Defined if we're going to use Libevent's buffered IO API])
  515. if test "$enable_static_libevent" = "yes"; then
  516. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent_openssl.a $TOR_LIBEVENT_LIBS"
  517. else
  518. TOR_LIBEVENT_LIBS="-levent_openssl $TOR_LIBEVENT_LIBS"
  519. fi
  520. fi
  521. AC_SUBST(TOR_LIBEVENT_LIBS)
  522. dnl ------------------------------------------------------
  523. dnl Where do you live, libm?
  524. dnl On some platforms (Haiku/BeOS) the math library is
  525. dnl part of libroot. In which case don't link against lm
  526. TOR_LIB_MATH=""
  527. save_LIBS="$LIBS"
  528. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  529. if test "$ac_cv_search_pow" != "none required"; then
  530. TOR_LIB_MATH="$ac_cv_search_pow"
  531. fi
  532. LIBS="$save_LIBS"
  533. AC_SUBST(TOR_LIB_MATH)
  534. dnl ------------------------------------------------------
  535. dnl Where do you live, openssl? And how do we call you?
  536. tor_openssl_pkg_redhat="openssl"
  537. tor_openssl_pkg_debian="libssl-dev"
  538. tor_openssl_devpkg_redhat="openssl-devel"
  539. tor_openssl_devpkg_debian="libssl-dev"
  540. ALT_openssl_WITHVAL=""
  541. AC_ARG_WITH(ssl-dir,
  542. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  543. [
  544. if test "x$withval" != xno && test "x$withval" != "x" ; then
  545. ALT_openssl_WITHVAL="$withval"
  546. fi
  547. ])
  548. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  549. [#include <openssl/rand.h>],
  550. [void RAND_add(const void *buf, int num, double entropy);],
  551. [RAND_add((void*)0,0,0); exit(0);], [],
  552. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  553. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  554. if test "$enable_static_openssl" = "yes"; then
  555. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  556. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  557. else
  558. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  559. fi
  560. else
  561. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  562. fi
  563. AC_SUBST(TOR_OPENSSL_LIBS)
  564. dnl Now check for particular openssl functions.
  565. save_LIBS="$LIBS"
  566. save_LDFLAGS="$LDFLAGS"
  567. save_CPPFLAGS="$CPPFLAGS"
  568. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  569. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  570. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  571. AC_TRY_COMPILE([
  572. #include <openssl/opensslv.h>
  573. #if OPENSSL_VERSION_NUMBER < 0x1000000fL
  574. #error "too old"
  575. #endif
  576. ], [],
  577. [ : ],
  578. [ AC_ERROR([OpenSSL is too old. We require 1.0.0 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  579. AC_TRY_COMPILE([
  580. #include <openssl/opensslv.h>
  581. #include <openssl/evp.h>
  582. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  583. #error "no ECC"
  584. #endif
  585. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  586. #error "curves unavailable"
  587. #endif
  588. ], [],
  589. [ : ],
  590. [ AC_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  591. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  592. [#include <openssl/ssl.h>
  593. ])
  594. AC_CHECK_FUNCS([ \
  595. SSL_SESSION_get_master_key \
  596. SSL_get_server_random \
  597. SSL_get_client_ciphers \
  598. SSL_get_client_random \
  599. SSL_CIPHER_find \
  600. TLS_method
  601. ])
  602. dnl Check if OpenSSL has scrypt implementation.
  603. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  604. LIBS="$save_LIBS"
  605. LDFLAGS="$save_LDFLAGS"
  606. CPPFLAGS="$save_CPPFLAGS"
  607. dnl ------------------------------------------------------
  608. dnl Where do you live, zlib? And how do we call you?
  609. tor_zlib_pkg_redhat="zlib"
  610. tor_zlib_pkg_debian="zlib1g"
  611. tor_zlib_devpkg_redhat="zlib-devel"
  612. tor_zlib_devpkg_debian="zlib1g-dev"
  613. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  614. [#include <zlib.h>],
  615. [const char * zlibVersion(void);],
  616. [zlibVersion(); exit(0);], [--with-zlib-dir],
  617. [/opt/zlib])
  618. if test "$enable_static_zlib" = "yes"; then
  619. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  620. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  621. using --enable-static-zlib")
  622. else
  623. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  624. fi
  625. else
  626. TOR_ZLIB_LIBS="-lz"
  627. fi
  628. AC_SUBST(TOR_ZLIB_LIBS)
  629. dnl ----------------------------------------------------------------------
  630. dnl Check if libcap is available for capabilities.
  631. tor_cap_pkg_debian="libcap2"
  632. tor_cap_pkg_redhat="libcap"
  633. tor_cap_devpkg_debian="libcap-dev"
  634. tor_cap_devpkg_redhat="libcap-devel"
  635. AC_CHECK_LIB([cap], [cap_init], [],
  636. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  637. )
  638. AC_CHECK_FUNCS(cap_set_proc)
  639. dnl ---------------------------------------------------------------------
  640. dnl Now that we know about our major libraries, we can check for compiler
  641. dnl and linker hardening options. We need to do this with the libraries known,
  642. dnl since sometimes the linker will like an option but not be willing to
  643. dnl use it with a build of a library.
  644. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  645. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  646. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  647. #if !defined(__clang__)
  648. #error
  649. #endif])], have_clang=yes, have_clang=no)
  650. if test x$enable_gcc_hardening != xno; then
  651. CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
  652. if test x$have_clang = xyes; then
  653. TOR_CHECK_CFLAGS(-Qunused-arguments)
  654. fi
  655. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  656. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  657. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  658. m4_ifdef([AS_VAR_IF],[
  659. AS_VAR_IF(can_compile, [yes],
  660. AS_VAR_IF(can_link, [yes],
  661. [],
  662. 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.)]))
  663. )])
  664. AS_VAR_POPDEF([can_link])
  665. AS_VAR_POPDEF([can_compile])
  666. TOR_CHECK_CFLAGS(-Wstack-protector)
  667. TOR_CHECK_CFLAGS(-fwrapv)
  668. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  669. if test "$bwin32" = "false"; then
  670. TOR_CHECK_CFLAGS(-fPIE)
  671. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  672. fi
  673. fi
  674. if test x$enable_expensive_hardening = xyes ; then
  675. TOR_CHECK_CFLAGS([-fsanitize=address])
  676. TOR_CHECK_CFLAGS([-fsanitize=undefined])
  677. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  678. fi
  679. if test x$enable_linker_hardening != xno; then
  680. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  681. fi
  682. # For backtrace support
  683. TOR_CHECK_LDFLAGS(-rdynamic)
  684. dnl ------------------------------------------------------
  685. dnl Now see if we have a -fomit-frame-pointer compiler option.
  686. saved_CFLAGS="$CFLAGS"
  687. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  688. F_OMIT_FRAME_POINTER=''
  689. if test "$saved_CFLAGS" != "$CFLAGS"; then
  690. if test x$enable_expensive_hardening != xyes ; then
  691. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  692. fi
  693. fi
  694. CFLAGS="$saved_CFLAGS"
  695. AC_SUBST(F_OMIT_FRAME_POINTER)
  696. dnl ------------------------------------------------------
  697. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  698. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  699. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  700. dnl code will work.
  701. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  702. dnl ============================================================
  703. dnl Check for libseccomp
  704. if test "x$enable_seccomp" != "xno"; then
  705. AC_CHECK_HEADERS([seccomp.h])
  706. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  707. fi
  708. dnl ============================================================
  709. dnl Check for libscrypt
  710. if test "x$enable_libscrypt" != "xno"; then
  711. AC_CHECK_HEADERS([libscrypt.h])
  712. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  713. fi
  714. dnl ============================================================
  715. dnl We need an implementation of curve25519.
  716. dnl set these defaults.
  717. build_curve25519_donna=no
  718. build_curve25519_donna_c64=no
  719. use_curve25519_donna=no
  720. use_curve25519_nacl=no
  721. CURVE25519_LIBS=
  722. dnl The best choice is using curve25519-donna-c64, but that requires
  723. dnl that we
  724. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  725. tor_cv_can_use_curve25519_donna_c64,
  726. [AC_RUN_IFELSE(
  727. [AC_LANG_PROGRAM([dnl
  728. #include <stdint.h>
  729. typedef unsigned uint128_t __attribute__((mode(TI)));
  730. int func(uint64_t a, uint64_t b) {
  731. uint128_t c = ((uint128_t)a) * b;
  732. int ok = ((uint64_t)(c>>96)) == 522859 &&
  733. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  734. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  735. (((uint64_t)(c))&0xffffffffL) == 0;
  736. return ok;
  737. }
  738. ], [dnl
  739. int ok = func( ((uint64_t)2000000000) * 1000000000,
  740. ((uint64_t)1234567890) << 24);
  741. return !ok;
  742. ])],
  743. [tor_cv_can_use_curve25519_donna_c64=yes],
  744. [tor_cv_can_use_curve25519_donna_c64=no],
  745. [AC_LINK_IFELSE(
  746. [AC_LANG_PROGRAM([dnl
  747. #include <stdint.h>
  748. typedef unsigned uint128_t __attribute__((mode(TI)));
  749. int func(uint64_t a, uint64_t b) {
  750. uint128_t c = ((uint128_t)a) * b;
  751. int ok = ((uint64_t)(c>>96)) == 522859 &&
  752. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  753. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  754. (((uint64_t)(c))&0xffffffffL) == 0;
  755. return ok;
  756. }
  757. ], [dnl
  758. int ok = func( ((uint64_t)2000000000) * 1000000000,
  759. ((uint64_t)1234567890) << 24);
  760. return !ok;
  761. ])],
  762. [tor_cv_can_use_curve25519_donna_c64=cross],
  763. [tor_cv_can_use_curve25519_donna_c64=no])])])
  764. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  765. nacl/crypto_scalarmult_curve25519.h])
  766. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  767. tor_cv_can_use_curve25519_nacl,
  768. [tor_saved_LIBS="$LIBS"
  769. LIBS="$LIBS -lnacl"
  770. AC_LINK_IFELSE(
  771. [AC_LANG_PROGRAM([dnl
  772. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  773. #include <crypto_scalarmult_curve25519.h>
  774. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  775. #include <nacl/crypto_scalarmult_curve25519.h>
  776. #endif
  777. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  778. #error Hey, this is the reference implementation! That's not fast.
  779. #endif
  780. ], [
  781. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  782. ])], [tor_cv_can_use_curve25519_nacl=yes],
  783. [tor_cv_can_use_curve25519_nacl=no])
  784. LIBS="$tor_saved_LIBS" ])
  785. dnl Okay, now we need to figure out which one to actually use. Fall back
  786. dnl to curve25519-donna.c
  787. if test x$tor_cv_can_use_curve25519_donna_c64 != xno; then
  788. build_curve25519_donna_c64=yes
  789. use_curve25519_donna=yes
  790. elif test x$tor_cv_can_use_curve25519_nacl = xyes; then
  791. use_curve25519_nacl=yes
  792. CURVE25519_LIBS=-lnacl
  793. else
  794. build_curve25519_donna=yes
  795. use_curve25519_donna=yes
  796. fi
  797. if test x$use_curve25519_donna = xyes; then
  798. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  799. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  800. fi
  801. if test x$use_curve25519_nacl = xyes; then
  802. AC_DEFINE(USE_CURVE25519_NACL, 1,
  803. [Defined if we should use a curve25519 from nacl])
  804. fi
  805. AM_CONDITIONAL(BUILD_CURVE25519_DONNA, test x$build_curve25519_donna = xyes)
  806. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64, test x$build_curve25519_donna_c64 = xyes)
  807. AC_SUBST(CURVE25519_LIBS)
  808. dnl Make sure to enable support for large off_t if available.
  809. AC_SYS_LARGEFILE
  810. AC_CHECK_HEADERS(
  811. assert.h \
  812. errno.h \
  813. fcntl.h \
  814. signal.h \
  815. string.h \
  816. sys/capability.h \
  817. sys/fcntl.h \
  818. sys/stat.h \
  819. sys/time.h \
  820. sys/types.h \
  821. time.h \
  822. unistd.h
  823. , , AC_MSG_WARN(Some headers were not found, compilation may fail. If compilation succeeds, please send your orconfig.h to the developers so we can fix this warning.))
  824. dnl These headers are not essential
  825. AC_CHECK_HEADERS(
  826. arpa/inet.h \
  827. crt_externs.h \
  828. execinfo.h \
  829. grp.h \
  830. ifaddrs.h \
  831. inttypes.h \
  832. limits.h \
  833. linux/types.h \
  834. machine/limits.h \
  835. malloc.h \
  836. malloc/malloc.h \
  837. malloc_np.h \
  838. netdb.h \
  839. netinet/in.h \
  840. netinet/in6.h \
  841. pwd.h \
  842. readpassphrase.h \
  843. stdint.h \
  844. sys/eventfd.h \
  845. sys/file.h \
  846. sys/ioctl.h \
  847. sys/limits.h \
  848. sys/mman.h \
  849. sys/param.h \
  850. sys/prctl.h \
  851. sys/resource.h \
  852. sys/select.h \
  853. sys/socket.h \
  854. sys/statvfs.h \
  855. sys/syscall.h \
  856. sys/sysctl.h \
  857. sys/syslimits.h \
  858. sys/time.h \
  859. sys/types.h \
  860. sys/un.h \
  861. sys/utime.h \
  862. sys/wait.h \
  863. syslog.h \
  864. utime.h
  865. )
  866. AC_CHECK_HEADERS(sys/param.h)
  867. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  868. [#ifdef HAVE_SYS_TYPES_H
  869. #include <sys/types.h>
  870. #endif
  871. #ifdef HAVE_SYS_SOCKET_H
  872. #include <sys/socket.h>
  873. #endif])
  874. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  875. [#ifdef HAVE_SYS_TYPES_H
  876. #include <sys/types.h>
  877. #endif
  878. #ifdef HAVE_SYS_SOCKET_H
  879. #include <sys/socket.h>
  880. #endif
  881. #ifdef HAVE_NET_IF_H
  882. #include <net/if.h>
  883. #endif
  884. #ifdef HAVE_NETINET_IN_H
  885. #include <netinet/in.h>
  886. #endif])
  887. AC_CHECK_HEADERS(linux/if.h,[],[],
  888. [
  889. #ifdef HAVE_SYS_SOCKET_H
  890. #include <sys/socket.h>
  891. #endif
  892. ])
  893. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  894. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  895. [#ifdef HAVE_SYS_TYPES_H
  896. #include <sys/types.h>
  897. #endif
  898. #ifdef HAVE_SYS_SOCKET_H
  899. #include <sys/socket.h>
  900. #endif
  901. #ifdef HAVE_LIMITS_H
  902. #include <limits.h>
  903. #endif
  904. #ifdef HAVE_LINUX_TYPES_H
  905. #include <linux/types.h>
  906. #endif
  907. #ifdef HAVE_NETINET_IN6_H
  908. #include <netinet/in6.h>
  909. #endif
  910. #ifdef HAVE_NETINET_IN_H
  911. #include <netinet/in.h>
  912. #endif])
  913. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  914. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  915. [#ifdef HAVE_SYS_TYPES_H
  916. #include <sys/types.h>
  917. #endif
  918. #ifdef HAVE_SYS_SOCKET_H
  919. #include <sys/socket.h>
  920. #endif
  921. #ifdef HAVE_LIMITS_H
  922. #include <limits.h>
  923. #endif
  924. #ifdef HAVE_LINUX_TYPES_H
  925. #include <linux/types.h>
  926. #endif
  927. #ifdef HAVE_NETINET_IN6_H
  928. #include <netinet/in6.h>
  929. #endif
  930. #ifdef HAVE_NETINET_IN_H
  931. #include <netinet/in.h>
  932. #endif
  933. #ifdef HAVE_LINUX_IF_H
  934. #include <linux/if.h>
  935. #endif])
  936. if test x$transparent = xtrue ; then
  937. transparent_ok=0
  938. if test x$net_if_found = x1 && test x$net_pfvar_found = x1 ; then
  939. transparent_ok=1
  940. fi
  941. if test x$linux_netfilter_ipv4 = x1 ; then
  942. transparent_ok=1
  943. fi
  944. if test x$linux_netfilter_ipv6_ip6_tables = x1 ; then
  945. transparent_ok=1
  946. fi
  947. if test x$transparent_ok = x1 ; then
  948. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  949. case $host in
  950. *-*-openbsd* | *-*-bitrig*)
  951. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  952. esac
  953. else
  954. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  955. fi
  956. fi
  957. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  958. [#ifdef HAVE_SYS_TYPES_H
  959. #include <sys/types.h>
  960. #endif
  961. #ifdef HAVE_SYS_TIME_H
  962. #include <sys/time.h>
  963. #endif])
  964. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  965. dnl Watch out.
  966. AC_CHECK_SIZEOF(int8_t)
  967. AC_CHECK_SIZEOF(int16_t)
  968. AC_CHECK_SIZEOF(int32_t)
  969. AC_CHECK_SIZEOF(int64_t)
  970. AC_CHECK_SIZEOF(uint8_t)
  971. AC_CHECK_SIZEOF(uint16_t)
  972. AC_CHECK_SIZEOF(uint32_t)
  973. AC_CHECK_SIZEOF(uint64_t)
  974. AC_CHECK_SIZEOF(intptr_t)
  975. AC_CHECK_SIZEOF(uintptr_t)
  976. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  977. AC_CHECK_SIZEOF(char)
  978. AC_CHECK_SIZEOF(short)
  979. AC_CHECK_SIZEOF(int)
  980. AC_CHECK_SIZEOF(long)
  981. AC_CHECK_SIZEOF(long long)
  982. AC_CHECK_SIZEOF(__int64)
  983. AC_CHECK_SIZEOF(void *)
  984. AC_CHECK_SIZEOF(time_t)
  985. AC_CHECK_SIZEOF(size_t)
  986. AC_CHECK_SIZEOF(pid_t)
  987. AC_CHECK_TYPES([uint, u_char, ssize_t])
  988. AC_PC_FROM_UCONTEXT([:])
  989. dnl used to include sockaddr_storage, but everybody has that.
  990. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  991. [#ifdef HAVE_SYS_TYPES_H
  992. #include <sys/types.h>
  993. #endif
  994. #ifdef HAVE_NETINET_IN_H
  995. #include <netinet/in.h>
  996. #endif
  997. #ifdef HAVE_NETINET_IN6_H
  998. #include <netinet/in6.h>
  999. #endif
  1000. #ifdef HAVE_SYS_SOCKET_H
  1001. #include <sys/socket.h>
  1002. #endif
  1003. #ifdef _WIN32
  1004. #define _WIN32_WINNT 0x0501
  1005. #define WIN32_LEAN_AND_MEAN
  1006. #include <winsock2.h>
  1007. #include <ws2tcpip.h>
  1008. #endif
  1009. ])
  1010. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1011. [#ifdef HAVE_SYS_TYPES_H
  1012. #include <sys/types.h>
  1013. #endif
  1014. #ifdef HAVE_NETINET_IN_H
  1015. #include <netinet/in.h>
  1016. #endif
  1017. #ifdef HAVE_NETINET_IN6_H
  1018. #include <netinet/in6.h>
  1019. #endif
  1020. #ifdef HAVE_SYS_SOCKET_H
  1021. #include <sys/socket.h>
  1022. #endif
  1023. #ifdef _WIN32
  1024. #define _WIN32_WINNT 0x0501
  1025. #define WIN32_LEAN_AND_MEAN
  1026. #include <winsock2.h>
  1027. #include <ws2tcpip.h>
  1028. #endif
  1029. ])
  1030. AC_CHECK_TYPES([rlim_t], , ,
  1031. [#ifdef HAVE_SYS_TYPES_H
  1032. #include <sys/types.h>
  1033. #endif
  1034. #ifdef HAVE_SYS_TIME_H
  1035. #include <sys/time.h>
  1036. #endif
  1037. #ifdef HAVE_SYS_RESOURCE_H
  1038. #include <sys/resource.h>
  1039. #endif
  1040. ])
  1041. AX_CHECK_SIGN([time_t],
  1042. [ AC_DEFINE(TIME_T_IS_SIGNED, 1, [Define if time_t is signed]) ],
  1043. [ : ], [
  1044. #ifdef HAVE_SYS_TYPES_H
  1045. #include <sys/types.h>
  1046. #endif
  1047. #ifdef HAVE_SYS_TIME_H
  1048. #include <sys/time.h>
  1049. #endif
  1050. #ifdef HAVE_TIME_H
  1051. #include <time.h>
  1052. #endif
  1053. ])
  1054. if test "$ax_cv_decl_time_t_signed" = no; then
  1055. AC_MSG_WARN([You have an unsigned time_t; some things will probably break. Please tell the Tor developers about your interesting platform.])
  1056. fi
  1057. AX_CHECK_SIGN([size_t],
  1058. [ tor_cv_size_t_signed=yes ],
  1059. [ tor_cv_size_t_signed=no ], [
  1060. #ifdef HAVE_SYS_TYPES_H
  1061. #include <sys/types.h>
  1062. #endif
  1063. ])
  1064. if test "$ax_cv_decl_size_t_signed" = yes; then
  1065. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1066. fi
  1067. AX_CHECK_SIGN([enum always],
  1068. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1069. [ : ], [
  1070. enum always { AAA, BBB, CCC };
  1071. ])
  1072. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1073. #ifdef HAVE_SYS_SOCKET_H
  1074. #include <sys/socket.h>
  1075. #endif
  1076. ])
  1077. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1078. AC_CHECK_SIZEOF(cell_t)
  1079. # Now make sure that NULL can be represented as zero bytes.
  1080. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1081. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1082. [[#include <stdlib.h>
  1083. #include <string.h>
  1084. #include <stdio.h>
  1085. #ifdef HAVE_STDDEF_H
  1086. #include <stddef.h>
  1087. #endif
  1088. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1089. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1090. [tor_cv_null_is_zero=yes],
  1091. [tor_cv_null_is_zero=no],
  1092. [tor_cv_null_is_zero=cross])])
  1093. if test "$tor_cv_null_is_zero" = cross ; then
  1094. # Cross-compiling; let's hope that the target isn't raving mad.
  1095. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1096. fi
  1097. if test "$tor_cv_null_is_zero" != no; then
  1098. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1099. [Define to 1 iff memset(0) sets pointers to NULL])
  1100. fi
  1101. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1102. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1103. [[#include <stdlib.h>
  1104. #include <string.h>
  1105. #include <stdio.h>
  1106. #ifdef HAVE_STDDEF_H
  1107. #include <stddef.h>
  1108. #endif
  1109. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1110. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1111. [tor_cv_dbl0_is_zero=yes],
  1112. [tor_cv_dbl0_is_zero=no],
  1113. [tor_cv_dbl0_is_zero=cross])])
  1114. if test "$tor_cv_dbl0_is_zero" = cross ; then
  1115. # Cross-compiling; let's hope that the target isn't raving mad.
  1116. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1117. fi
  1118. if test "$tor_cv_dbl0_is_zero" != no; then
  1119. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1120. [Define to 1 iff memset(0) sets doubles to 0.0])
  1121. fi
  1122. # And what happens when we malloc zero?
  1123. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1124. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1125. [[#include <stdlib.h>
  1126. #include <string.h>
  1127. #include <stdio.h>
  1128. #ifdef HAVE_STDDEF_H
  1129. #include <stddef.h>
  1130. #endif
  1131. int main () { return malloc(0)?0:1; }]])],
  1132. [tor_cv_malloc_zero_works=yes],
  1133. [tor_cv_malloc_zero_works=no],
  1134. [tor_cv_malloc_zero_works=cross])])
  1135. if test "$tor_cv_malloc_zero_works" = cross; then
  1136. # Cross-compiling; let's hope that the target isn't raving mad.
  1137. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1138. fi
  1139. if test "$tor_cv_malloc_zero_works" = yes; then
  1140. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1141. [Define to 1 iff malloc(0) returns a pointer])
  1142. fi
  1143. # whether we seem to be in a 2s-complement world.
  1144. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1145. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1146. [[int main () { int problem = ((-99) != (~99)+1);
  1147. return problem ? 1 : 0; }]])],
  1148. [tor_cv_twos_complement=yes],
  1149. [tor_cv_twos_complement=no],
  1150. [tor_cv_twos_complement=cross])])
  1151. if test "$tor_cv_twos_complement" = cross ; then
  1152. # Cross-compiling; let's hope that the target isn't raving mad.
  1153. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1154. fi
  1155. if test "$tor_cv_twos_complement" != no ; then
  1156. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1157. [Define to 1 iff we represent negative integers with two's complement])
  1158. fi
  1159. # What does shifting a negative value do?
  1160. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1161. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1162. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1163. [tor_cv_sign_extend=yes],
  1164. [tor_cv_sign_extend=no],
  1165. [tor_cv_sign_extend=cross])])
  1166. if test "$tor_cv_sign_extend" = cross ; then
  1167. # Cross-compiling; let's hope that the target isn't raving mad.
  1168. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1169. fi
  1170. if test "$tor_cv_sign_extend" != no ; then
  1171. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1172. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1173. fi
  1174. # Whether we should use the dmalloc memory allocation debugging library.
  1175. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1176. AC_ARG_WITH(dmalloc,
  1177. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1178. [if [[ "$withval" = "yes" ]]; then
  1179. dmalloc=1
  1180. AC_MSG_RESULT(yes)
  1181. else
  1182. dmalloc=1
  1183. AC_MSG_RESULT(no)
  1184. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1185. )
  1186. if [[ $dmalloc -eq 1 ]]; then
  1187. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1188. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1189. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1190. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1191. fi
  1192. AC_ARG_WITH(tcmalloc,
  1193. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1194. [ tcmalloc=yes ], [ tcmalloc=no ])
  1195. if test x$tcmalloc = xyes ; then
  1196. LDFLAGS="-ltcmalloc $LDFLAGS"
  1197. fi
  1198. using_custom_malloc=no
  1199. if test x$enable_openbsd_malloc = xyes ; then
  1200. using_custom_malloc=yes
  1201. fi
  1202. if test x$tcmalloc = xyes ; then
  1203. using_custom_malloc=yes
  1204. fi
  1205. if test $using_custom_malloc = no ; then
  1206. AC_CHECK_FUNCS(mallinfo)
  1207. fi
  1208. # By default, we're going to assume we don't have mlockall()
  1209. # bionic and other platforms have various broken mlockall subsystems.
  1210. # Some systems don't have a working mlockall, some aren't linkable,
  1211. # and some have it but don't declare it.
  1212. AC_CHECK_FUNCS(mlockall)
  1213. AC_CHECK_DECLS([mlockall], , , [
  1214. #ifdef HAVE_SYS_MMAN_H
  1215. #include <sys/mman.h>
  1216. #endif])
  1217. # Allow user to specify an alternate syslog facility
  1218. AC_ARG_WITH(syslog-facility,
  1219. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1220. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1221. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1222. AC_SUBST(LOGFACILITY)
  1223. # Check if we have getresuid and getresgid
  1224. AC_CHECK_FUNCS(getresuid getresgid)
  1225. # Check for gethostbyname_r in all its glorious incompatible versions.
  1226. # (This logic is based on that in Python's configure.in)
  1227. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1228. [Define this if you have any gethostbyname_r()])
  1229. AC_CHECK_FUNC(gethostbyname_r, [
  1230. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1231. OLD_CFLAGS=$CFLAGS
  1232. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1233. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1234. #include <netdb.h>
  1235. ], [[
  1236. char *cp1, *cp2;
  1237. struct hostent *h1, *h2;
  1238. int i1, i2;
  1239. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1240. ]])],[
  1241. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1242. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1243. [Define this if gethostbyname_r takes 6 arguments])
  1244. AC_MSG_RESULT(6)
  1245. ], [
  1246. AC_TRY_COMPILE([
  1247. #include <netdb.h>
  1248. ], [
  1249. char *cp1, *cp2;
  1250. struct hostent *h1;
  1251. int i1, i2;
  1252. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1253. ], [
  1254. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1255. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1256. [Define this if gethostbyname_r takes 5 arguments])
  1257. AC_MSG_RESULT(5)
  1258. ], [
  1259. AC_TRY_COMPILE([
  1260. #include <netdb.h>
  1261. ], [
  1262. char *cp1;
  1263. struct hostent *h1;
  1264. struct hostent_data hd;
  1265. (void) gethostbyname_r(cp1,h1,&hd);
  1266. ], [
  1267. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1268. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1269. [Define this if gethostbyname_r takes 3 arguments])
  1270. AC_MSG_RESULT(3)
  1271. ], [
  1272. AC_MSG_RESULT(0)
  1273. ])
  1274. ])
  1275. ])
  1276. CFLAGS=$OLD_CFLAGS
  1277. ])
  1278. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1279. tor_cv_have_func_macro,
  1280. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1281. #include <stdio.h>
  1282. int main(int c, char **v) { puts(__func__); }])],
  1283. tor_cv_have_func_macro=yes,
  1284. tor_cv_have_func_macro=no))
  1285. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1286. tor_cv_have_FUNC_macro,
  1287. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1288. #include <stdio.h>
  1289. int main(int c, char **v) { puts(__FUNC__); }])],
  1290. tor_cv_have_FUNC_macro=yes,
  1291. tor_cv_have_FUNC_macro=no))
  1292. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1293. tor_cv_have_FUNCTION_macro,
  1294. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1295. #include <stdio.h>
  1296. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1297. tor_cv_have_FUNCTION_macro=yes,
  1298. tor_cv_have_FUNCTION_macro=no))
  1299. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1300. tor_cv_have_environ_declared,
  1301. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1302. /* We define _GNU_SOURCE here because it is also defined in compat.c.
  1303. * Without it environ doesn't get declared. */
  1304. #define _GNU_SOURCE
  1305. #ifdef HAVE_UNISTD_H
  1306. #include <unistd.h>
  1307. #endif
  1308. #include <stdlib.h>
  1309. int main(int c, char **v) { char **t = environ; }])],
  1310. tor_cv_have_environ_declared=yes,
  1311. tor_cv_have_environ_declared=no))
  1312. if test "$tor_cv_have_func_macro" = 'yes'; then
  1313. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1314. fi
  1315. if test "$tor_cv_have_FUNC_macro" = 'yes'; then
  1316. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1317. fi
  1318. if test "$tor_cv_have_FUNCTION_macro" = 'yes'; then
  1319. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1320. [Defined if the compiler supports __FUNCTION__])
  1321. fi
  1322. if test "$tor_cv_have_environ_declared" = 'yes'; then
  1323. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1324. [Defined if we have extern char **environ already declared])
  1325. fi
  1326. # $prefix stores the value of the --prefix command line option, or
  1327. # NONE if the option wasn't set. In the case that it wasn't set, make
  1328. # it be the default, so that we can use it to expand directories now.
  1329. if test "x$prefix" = "xNONE"; then
  1330. prefix=$ac_default_prefix
  1331. fi
  1332. # and similarly for $exec_prefix
  1333. if test "x$exec_prefix" = "xNONE"; then
  1334. exec_prefix=$prefix
  1335. fi
  1336. if test "x$BUILDDIR" = "x"; then
  1337. BUILDDIR=`pwd`
  1338. fi
  1339. AC_SUBST(BUILDDIR)
  1340. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1341. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1342. if test "x$CONFDIR" = "x"; then
  1343. CONFDIR=`eval echo $sysconfdir/tor`
  1344. fi
  1345. AC_SUBST(CONFDIR)
  1346. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1347. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1348. BINDIR=`eval echo $bindir`
  1349. AC_SUBST(BINDIR)
  1350. LOCALSTATEDIR=`eval echo $localstatedir`
  1351. AC_SUBST(LOCALSTATEDIR)
  1352. if test "$bwin32" = true; then
  1353. # Test if the linker supports the --nxcompat and --dynamicbase options
  1354. # for Windows
  1355. save_LDFLAGS="$LDFLAGS"
  1356. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1357. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1358. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1359. [AC_MSG_RESULT([yes])]
  1360. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1361. [AC_MSG_RESULT([no])]
  1362. )
  1363. LDFLAGS="$save_LDFLAGS"
  1364. fi
  1365. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1366. # than autoconf's macros like.
  1367. if test "$GCC" = yes; then
  1368. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1369. # accident waiting to happen.
  1370. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1371. else
  1372. # Override optimization level for non-gcc compilers
  1373. CFLAGS="$CFLAGS -O"
  1374. enable_gcc_warnings=no
  1375. enable_gcc_warnings_advisory=no
  1376. fi
  1377. # OS X Lion started deprecating the system openssl. Let's just disable
  1378. # all deprecation warnings on OS X. Also, to potentially make the binary
  1379. # a little smaller, let's enable dead_strip.
  1380. case "$host_os" in
  1381. darwin*)
  1382. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1383. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1384. esac
  1385. # Add some more warnings which we use in development but not in the
  1386. # released versions. (Some relevant gcc versions can't handle these.)
  1387. if test x$enable_gcc_warnings = xyes || test x$enable_gcc_warnings_advisory = xyes; then
  1388. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1389. #if !defined(__GNUC__) || (__GNUC__ < 4)
  1390. #error
  1391. #endif])], have_gcc4=yes, have_gcc4=no)
  1392. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1393. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)
  1394. #error
  1395. #endif])], have_gcc42=yes, have_gcc42=no)
  1396. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1397. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
  1398. #error
  1399. #endif])], have_gcc43=yes, have_gcc43=no)
  1400. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1401. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)
  1402. #error
  1403. #endif])], have_gcc46=yes, have_gcc46=no)
  1404. save_CFLAGS="$CFLAGS"
  1405. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1406. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], have_shorten64_flag=yes,
  1407. have_shorten64_flag=no)
  1408. CFLAGS="$save_CFLAGS"
  1409. case $host in
  1410. *-*-openbsd* | *-*-bitrig*)
  1411. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1412. # That's fine, except that the headers don't pass -Wredundant-decls.
  1413. # Therefore, let's disable -Wsystem-headers when we're building
  1414. # with maximal warnings on OpenBSD.
  1415. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1416. esac
  1417. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1418. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1419. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1420. CFLAGS="$CFLAGS -Wwrite-strings -Wmissing-declarations -Wredundant-decls"
  1421. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1422. if test x$enable_gcc_warnings = xyes; then
  1423. CFLAGS="$CFLAGS -Werror"
  1424. fi
  1425. # Disabled, so we can use mallinfo(): -Waggregate-return
  1426. if test x$have_gcc4 = xyes ; then
  1427. # These warnings break gcc 3.3.5 and work on gcc 4.0.2
  1428. CFLAGS="$CFLAGS -Winit-self -Wmissing-field-initializers -Wold-style-definition"
  1429. fi
  1430. if test x$have_gcc42 = xyes ; then
  1431. # These warnings break gcc 4.0.2 and work on gcc 4.2
  1432. # XXXX020 See if any of these work with earlier versions.
  1433. CFLAGS="$CFLAGS -Waddress -Wmissing-noreturn -Wstrict-overflow=1"
  1434. # We used to use -Wstrict-overflow=5, but that breaks us heavily under 4.3.
  1435. fi
  1436. if test x$have_gcc42 = xyes && test x$have_clang = xno; then
  1437. # These warnings break gcc 4.0.2 and clang, but work on gcc 4.2
  1438. CFLAGS="$CFLAGS -Wnormalized=id -Woverride-init"
  1439. fi
  1440. if test x$have_gcc43 = xyes ; then
  1441. # These warnings break gcc 4.2 and work on gcc 4.3
  1442. # XXXX020 See if any of these work with earlier versions.
  1443. CFLAGS="$CFLAGS -Wextra -Warray-bounds"
  1444. fi
  1445. if test x$have_gcc46 = xyes ; then
  1446. # This warning was added in gcc 4.3, but it appears to generate
  1447. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1448. CFLAGS="$CFLAGS -Wlogical-op"
  1449. fi
  1450. if test x$have_shorten64_flag = xyes ; then
  1451. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1452. fi
  1453. ##This will break the world on some 64-bit architectures
  1454. # CFLAGS="$CFLAGS -Winline"
  1455. fi
  1456. if test "$enable_coverage" = yes && test "$have_clang" = "no"; then
  1457. case "$host_os" in
  1458. darwin*)
  1459. 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.])
  1460. esac
  1461. fi
  1462. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1463. AC_CONFIG_FILES([
  1464. Doxyfile
  1465. Makefile
  1466. contrib/dist/suse/tor.sh
  1467. contrib/operator-tools/tor.logrotate
  1468. contrib/dist/tor.sh
  1469. contrib/dist/torctl
  1470. contrib/dist/tor.service
  1471. src/config/torrc.sample
  1472. src/config/torrc.minimal
  1473. scripts/maint/checkOptionDocs.pl
  1474. scripts/maint/updateVersions.pl
  1475. ])
  1476. if test x$asciidoc = xtrue && test "$ASCIIDOC" = "none" ; then
  1477. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1478. for file in $regular_mans ; do
  1479. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1480. echo "==================================";
  1481. echo;
  1482. echo "Building Tor has failed since manpages cannot be built.";
  1483. echo;
  1484. echo "You need asciidoc installed to be able to build the manpages.";
  1485. echo "To build without manpages, use the --disable-asciidoc argument";
  1486. echo "when calling configure.";
  1487. echo;
  1488. echo "==================================";
  1489. exit 1;
  1490. fi
  1491. done
  1492. fi
  1493. AC_OUTPUT