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],[0.2.8.0-alpha-dev])
  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(system-torrc,
  39. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  40. AM_CONDITIONAL(UNITTESTS_ENABLED, test x$enable_unittests != xno)
  41. AM_CONDITIONAL(COVERAGE_ENABLED, test x$enable_coverage = xyes)
  42. if test "$enable_static_tor" = "yes"; then
  43. enable_static_libevent="yes";
  44. enable_static_openssl="yes";
  45. enable_static_zlib="yes";
  46. CFLAGS="$CFLAGS -static"
  47. fi
  48. if test "$enable_system_torrc" = "no"; then
  49. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  50. [Defined if we're not going to look for a torrc in SYSCONF])
  51. fi
  52. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test x$enable_openbsd_malloc = xyes)
  53. if test x$enable_instrument_downloads = xyes; then
  54. AC_DEFINE(INSTRUMENT_DOWNLOADS, 1,
  55. [Defined if we want to keep track of how much of each kind of resource we download.])
  56. fi
  57. AC_ARG_ENABLE(transparent,
  58. AS_HELP_STRING(--disable-transparent, [disable transparent proxy support]),
  59. [case "${enableval}" in
  60. yes) transparent=true ;;
  61. no) transparent=false ;;
  62. *) AC_MSG_ERROR(bad value for --enable-transparent) ;;
  63. esac], [transparent=true])
  64. AC_ARG_ENABLE(asciidoc,
  65. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  66. [case "${enableval}" in
  67. yes) asciidoc=true ;;
  68. no) asciidoc=false ;;
  69. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  70. esac], [asciidoc=true])
  71. # systemd notify support
  72. AC_ARG_ENABLE(systemd,
  73. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  74. [case "${enableval}" in
  75. yes) systemd=true ;;
  76. no) systemd=false ;;
  77. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  78. esac], [systemd=auto])
  79. # systemd support
  80. if test x$enable_systemd = xno ; then
  81. have_systemd=no;
  82. else
  83. PKG_CHECK_MODULES(SYSTEMD,
  84. [libsystemd-daemon],
  85. have_systemd=yes,
  86. have_systemd=no)
  87. if test x$have_systemd=xno; then
  88. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  89. PKG_CHECK_MODULES(SYSTEMD,
  90. [libsystemd],
  91. have_systemd=yes,
  92. have_systemd=no)
  93. fi
  94. fi
  95. if test x$have_systemd = xyes; then
  96. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  97. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  98. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  99. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  100. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  101. fi
  102. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  103. AC_SUBST(TOR_SYSTEMD_LIBS)
  104. if test x$enable_systemd = xyes -a x$have_systemd != xyes ; then
  105. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  106. fi
  107. case $host in
  108. *-*-solaris* )
  109. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  110. ;;
  111. esac
  112. AC_ARG_ENABLE(gcc-warnings,
  113. AS_HELP_STRING(--enable-gcc-warnings, [enable verbose warnings]))
  114. AC_ARG_ENABLE(gcc-warnings-advisory,
  115. AS_HELP_STRING(--enable-gcc-warnings-advisory, [enable verbose warnings, excluding -Werror]))
  116. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  117. AC_ARG_ENABLE(gcc-hardening,
  118. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  119. AC_ARG_ENABLE(expensive-hardening,
  120. AS_HELP_STRING(--enable-expensive-hardening, [enable more expensive compiler hardening; makes Tor slower]))
  121. dnl Linker hardening options
  122. dnl Currently these options are ELF specific - you can't use this with MacOSX
  123. AC_ARG_ENABLE(linker-hardening,
  124. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  125. AC_ARG_ENABLE(local-appdata,
  126. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  127. if test "$enable_local_appdata" = "yes"; then
  128. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  129. [Defined if we default to host local appdata paths on Windows])
  130. fi
  131. # Tor2web mode flag
  132. AC_ARG_ENABLE(tor2web-mode,
  133. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  134. [if test x$enableval = xyes; then
  135. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  136. fi])
  137. AC_ARG_ENABLE(bufferevents,
  138. AS_HELP_STRING(--enable-bufferevents, [use Libevent's buffered IO]))
  139. AC_ARG_ENABLE(tool-name-check,
  140. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  141. AC_ARG_ENABLE(seccomp,
  142. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  143. AC_ARG_ENABLE(libscrypt,
  144. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  145. dnl check for the correct "ar" when cross-compiling
  146. AN_MAKEVAR([AR], [AC_PROG_AR])
  147. AN_PROGRAM([ar], [AC_PROG_AR])
  148. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [ar])])
  149. AC_PROG_AR
  150. dnl Check whether the above macro has settled for a simply named tool even
  151. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  152. dnl because that will find any cc on the system, not only the cross-compiler,
  153. dnl and then verify that a binary built with this compiler runs on the
  154. dnl build system. It will then come to the false conclusion that we're not
  155. dnl cross-compiling.
  156. if test x$enable_tool_name_check != xno; then
  157. if test x$ac_tool_warned = xyes; then
  158. 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.)])
  159. elif test "x$ac_ct_AR" != x -a x$cross_compiling = xmaybe; then
  160. 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.)])
  161. fi
  162. fi
  163. AC_PROG_CC
  164. AC_PROG_CPP
  165. AC_PROG_MAKE_SET
  166. AC_PROG_RANLIB
  167. AC_PATH_PROG([PERL], [perl])
  168. dnl autoconf 2.59 appears not to support AC_PROG_SED
  169. AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
  170. dnl check for asciidoc and a2x
  171. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  172. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  173. AM_CONDITIONAL(USE_ASCIIDOC, test x$asciidoc = xtrue)
  174. AM_CONDITIONAL(USE_FW_HELPER, test x$natpmp = xtrue || test x$upnp = xtrue)
  175. AM_CONDITIONAL(NAT_PMP, test x$natpmp = xtrue)
  176. AM_CONDITIONAL(MINIUPNPC, test x$upnp = xtrue)
  177. AM_PROG_CC_C_O
  178. AC_PROG_CC_C99
  179. AC_ARG_VAR([PYTHON], [path to Python binary])
  180. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  181. if test "x$PYTHON" = "x"; then
  182. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  183. fi
  184. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  185. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  186. AC_C_FLEXIBLE_ARRAY_MEMBER
  187. ], [
  188. dnl Maybe we've got an old autoconf...
  189. AC_CACHE_CHECK([for flexible array members],
  190. tor_cv_c_flexarray,
  191. [AC_COMPILE_IFELSE(
  192. AC_LANG_PROGRAM([
  193. struct abc { int a; char b[]; };
  194. ], [
  195. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  196. def->b[0] = 33;
  197. ]),
  198. [tor_cv_c_flexarray=yes],
  199. [tor_cv_c_flexarray=no])])
  200. if test $tor_cv_flexarray = yes ; then
  201. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  202. else
  203. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  204. fi
  205. ])
  206. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  207. tor_cv_c_c99_decl,
  208. [AC_COMPILE_IFELSE(
  209. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  210. [tor_cv_c_c99_decl=yes],
  211. [tor_cv_c_c99_decl=no] )])
  212. if test "$tor_cv_c_c99_decl" != "yes"; then
  213. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  214. fi
  215. AC_CACHE_CHECK([for working C99 designated initializers],
  216. tor_cv_c_c99_designated_init,
  217. [AC_COMPILE_IFELSE(
  218. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  219. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  220. [tor_cv_c_c99_designated_init=yes],
  221. [tor_cv_c_c99_designated_init=no] )])
  222. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  223. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  224. fi
  225. TORUSER=_tor
  226. AC_ARG_WITH(tor-user,
  227. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  228. [
  229. TORUSER=$withval
  230. ]
  231. )
  232. AC_SUBST(TORUSER)
  233. TORGROUP=_tor
  234. AC_ARG_WITH(tor-group,
  235. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  236. [
  237. TORGROUP=$withval
  238. ]
  239. )
  240. AC_SUBST(TORGROUP)
  241. dnl If _WIN32 is defined and non-zero, we are building for win32
  242. AC_MSG_CHECKING([for win32])
  243. AC_RUN_IFELSE([AC_LANG_SOURCE([
  244. int main(int c, char **v) {
  245. #ifdef _WIN32
  246. #if _WIN32
  247. return 0;
  248. #else
  249. return 1;
  250. #endif
  251. #else
  252. return 2;
  253. #endif
  254. }])],
  255. bwin32=true; AC_MSG_RESULT([yes]),
  256. bwin32=false; AC_MSG_RESULT([no]),
  257. bwin32=cross; AC_MSG_RESULT([cross])
  258. )
  259. if test "$bwin32" = cross; then
  260. AC_MSG_CHECKING([for win32 (cross)])
  261. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  262. #ifdef _WIN32
  263. int main(int c, char **v) {return 0;}
  264. #else
  265. #error
  266. int main(int c, char **v) {return x(y);}
  267. #endif
  268. ])],
  269. bwin32=true; AC_MSG_RESULT([yes]),
  270. bwin32=false; AC_MSG_RESULT([no]))
  271. fi
  272. AH_BOTTOM([
  273. #ifdef _WIN32
  274. /* Defined to access windows functions and definitions for >=WinXP */
  275. # ifndef WINVER
  276. # define WINVER 0x0501
  277. # endif
  278. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  279. # ifndef _WIN32_WINNT
  280. # define _WIN32_WINNT 0x0501
  281. # endif
  282. /* Defined to avoid including some windows headers as part of Windows.h */
  283. # ifndef WIN32_LEAN_AND_MEAN
  284. # define WIN32_LEAN_AND_MEAN 1
  285. # endif
  286. #endif
  287. ])
  288. AM_CONDITIONAL(BUILD_NT_SERVICES, test x$bwin32 = xtrue)
  289. dnl Enable C99 when compiling with MIPSpro
  290. AC_MSG_CHECKING([for MIPSpro compiler])
  291. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  292. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  293. #error
  294. return x(y);
  295. #endif
  296. ])],
  297. bmipspro=false; AC_MSG_RESULT(no),
  298. bmipspro=true; AC_MSG_RESULT(yes))
  299. if test "$bmipspro" = true; then
  300. CFLAGS="$CFLAGS -c99"
  301. fi
  302. AC_C_BIGENDIAN
  303. AC_SEARCH_LIBS(socket, [socket network])
  304. AC_SEARCH_LIBS(gethostbyname, [nsl])
  305. AC_SEARCH_LIBS(dlopen, [dl])
  306. AC_SEARCH_LIBS(inet_aton, [resolv])
  307. AC_SEARCH_LIBS(backtrace, [execinfo])
  308. saved_LIBS="$LIBS"
  309. AC_SEARCH_LIBS([clock_gettime], [rt])
  310. if test "$LIBS" != "$saved_LIBS"; then
  311. # Looks like we need -lrt for clock_gettime().
  312. have_rt=yes
  313. fi
  314. AC_SEARCH_LIBS(pthread_create, [pthread])
  315. AC_SEARCH_LIBS(pthread_detach, [pthread])
  316. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  317. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  318. AC_CHECK_FUNCS(
  319. _NSGetEnviron \
  320. accept4 \
  321. backtrace \
  322. backtrace_symbols_fd \
  323. clock_gettime \
  324. eventfd \
  325. flock \
  326. ftime \
  327. getaddrinfo \
  328. getentropy \
  329. getifaddrs \
  330. getpass \
  331. getrlimit \
  332. gettimeofday \
  333. gmtime_r \
  334. inet_aton \
  335. ioctl \
  336. issetugid \
  337. llround \
  338. localtime_r \
  339. lround \
  340. memmem \
  341. pipe \
  342. pipe2 \
  343. prctl \
  344. readpassphrase \
  345. rint \
  346. sigaction \
  347. socketpair \
  348. statvfs \
  349. strlcat \
  350. strlcpy \
  351. strnlen \
  352. strptime \
  353. strtok_r \
  354. strtoull \
  355. sysconf \
  356. sysctl \
  357. uname \
  358. usleep \
  359. vasprintf \
  360. _vscprintf
  361. )
  362. if test "$bwin32" != true; then
  363. AC_CHECK_HEADERS(pthread.h)
  364. AC_CHECK_FUNCS(pthread_create)
  365. AC_CHECK_FUNCS(pthread_condattr_setclock)
  366. fi
  367. if test "$bwin32" = true; then
  368. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  369. #include <windows.h>
  370. #include <conio.h>
  371. #include <wchar.h>
  372. ])
  373. fi
  374. AM_CONDITIONAL(BUILD_READPASSPHRASE_C, test x$ac_cv_func_readpassphrase = xno && test $bwin32 = false)
  375. dnl ------------------------------------------------------
  376. dnl Where do you live, libevent? And how do we call you?
  377. if test "$bwin32" = true; then
  378. TOR_LIB_WS32=-lws2_32
  379. TOR_LIB_IPHLPAPI=-liphlpapi
  380. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  381. # think it's actually necessary.
  382. TOR_LIB_GDI=-lgdi32
  383. else
  384. TOR_LIB_WS32=
  385. TOR_LIB_GDI=
  386. fi
  387. AC_SUBST(TOR_LIB_WS32)
  388. AC_SUBST(TOR_LIB_GDI)
  389. AC_SUBST(TOR_LIB_IPHLPAPI)
  390. tor_libevent_pkg_redhat="libevent"
  391. tor_libevent_pkg_debian="libevent-dev"
  392. tor_libevent_devpkg_redhat="libevent-devel"
  393. tor_libevent_devpkg_debian="libevent-dev"
  394. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  395. dnl linking for static builds.
  396. STATIC_LIBEVENT_FLAGS=""
  397. if test "$enable_static_libevent" = "yes"; then
  398. if test "$have_rt" = yes; then
  399. STATIC_LIBEVENT_FLAGS=" -lrt "
  400. fi
  401. fi
  402. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  403. #ifdef _WIN32
  404. #include <winsock2.h>
  405. #endif
  406. #include <stdlib.h>
  407. #include <sys/time.h>
  408. #include <sys/types.h>
  409. #include <event.h>], [
  410. #ifdef _WIN32
  411. #include <winsock2.h>
  412. #endif
  413. void exit(int); void *event_init(void);],
  414. [
  415. #ifdef _WIN32
  416. {WSADATA d; WSAStartup(0x101,&d); }
  417. #endif
  418. event_init(); exit(0);
  419. ], [--with-libevent-dir], [/opt/libevent])
  420. dnl Now check for particular libevent functions.
  421. save_LIBS="$LIBS"
  422. save_LDFLAGS="$LDFLAGS"
  423. save_CPPFLAGS="$CPPFLAGS"
  424. LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
  425. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  426. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  427. AC_CHECK_FUNCS([event_get_version_number \
  428. evutil_secure_rng_set_urandom_device_file \
  429. evutil_secure_rng_init \
  430. ])
  431. AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
  432. [#include <event.h>
  433. ])
  434. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  435. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  436. AM_CONDITIONAL(USE_EXTERNAL_EVDNS, test x$ac_cv_header_event2_dns_h = xyes)
  437. if test "$enable_static_libevent" = "yes"; then
  438. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  439. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  440. else
  441. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  442. fi
  443. else
  444. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  445. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  446. 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"))
  447. if test "$ac_cv_search_event_new" != "none required"; then
  448. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  449. fi
  450. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  451. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  452. fi
  453. else
  454. TOR_LIBEVENT_LIBS="-levent"
  455. fi
  456. fi
  457. LIBS="$save_LIBS"
  458. LDFLAGS="$save_LDFLAGS"
  459. CPPFLAGS="$save_CPPFLAGS"
  460. dnl This isn't the best test for Libevent 2.0.3-alpha. Once it's released,
  461. dnl we can do much better.
  462. if test "$enable_bufferevents" = "yes" ; then
  463. if test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes" ; then
  464. 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.])
  465. else
  466. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  467. # Check for the right version. First see if version detection works.
  468. AC_MSG_CHECKING([whether we can detect the Libevent version])
  469. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  470. #include <event2/event.h>
  471. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 10
  472. #error
  473. int x = y(zz);
  474. #else
  475. int x = 1;
  476. #endif
  477. ])], [event_version_number_works=yes; AC_MSG_RESULT([yes]) ],
  478. [event_version_number_works=no; AC_MSG_RESULT([no])])
  479. if test "$event_version_number_works" != 'yes'; then
  480. AC_MSG_WARN([Version detection on Libevent seems broken. Your Libevent installation is probably screwed up or very old.])
  481. else
  482. AC_MSG_CHECKING([whether Libevent is new enough for bufferevents])
  483. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  484. #include <event2/event.h>
  485. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000d00
  486. #error
  487. int x = y(zz);
  488. #else
  489. int x = 1;
  490. #endif
  491. ])], [ AC_MSG_RESULT([yes]) ],
  492. [ AC_MSG_RESULT([no])
  493. AC_MSG_ERROR([Libevent does not seem new enough to support bufferevents. We require 2.0.13-stable or later]) ] )
  494. fi
  495. fi
  496. fi
  497. LIBS="$save_LIBS"
  498. LDFLAGS="$save_LDFLAGS"
  499. CPPFLAGS="$save_CPPFLAGS"
  500. AM_CONDITIONAL(USE_BUFFEREVENTS, test "$enable_bufferevents" = "yes")
  501. if test "$enable_bufferevents" = "yes"; then
  502. AC_DEFINE(USE_BUFFEREVENTS, 1, [Defined if we're going to use Libevent's buffered IO API])
  503. if test "$enable_static_libevent" = "yes"; then
  504. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent_openssl.a $TOR_LIBEVENT_LIBS"
  505. else
  506. TOR_LIBEVENT_LIBS="-levent_openssl $TOR_LIBEVENT_LIBS"
  507. fi
  508. fi
  509. AC_SUBST(TOR_LIBEVENT_LIBS)
  510. dnl ------------------------------------------------------
  511. dnl Where do you live, libm?
  512. dnl On some platforms (Haiku/BeOS) the math library is
  513. dnl part of libroot. In which case don't link against lm
  514. TOR_LIB_MATH=""
  515. save_LIBS="$LIBS"
  516. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  517. if test "$ac_cv_search_pow" != "none required"; then
  518. TOR_LIB_MATH="$ac_cv_search_pow"
  519. fi
  520. LIBS="$save_LIBS"
  521. AC_SUBST(TOR_LIB_MATH)
  522. dnl ------------------------------------------------------
  523. dnl Where do you live, openssl? And how do we call you?
  524. tor_openssl_pkg_redhat="openssl"
  525. tor_openssl_pkg_debian="libssl-dev"
  526. tor_openssl_devpkg_redhat="openssl-devel"
  527. tor_openssl_devpkg_debian="libssl-dev"
  528. ALT_openssl_WITHVAL=""
  529. AC_ARG_WITH(ssl-dir,
  530. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  531. [
  532. if test "x$withval" != xno && test "x$withval" != "x" ; then
  533. ALT_openssl_WITHVAL="$withval"
  534. fi
  535. ])
  536. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  537. [#include <openssl/rand.h>],
  538. [void RAND_add(const void *buf, int num, double entropy);],
  539. [RAND_add((void*)0,0,0); exit(0);], [],
  540. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  541. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  542. if test "$enable_static_openssl" = "yes"; then
  543. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  544. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  545. else
  546. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  547. fi
  548. else
  549. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  550. fi
  551. AC_SUBST(TOR_OPENSSL_LIBS)
  552. dnl Now check for particular openssl functions.
  553. save_LIBS="$LIBS"
  554. save_LDFLAGS="$LDFLAGS"
  555. save_CPPFLAGS="$CPPFLAGS"
  556. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  557. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  558. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  559. AC_TRY_COMPILE([
  560. #include <openssl/opensslv.h>
  561. #if OPENSSL_VERSION_NUMBER < 0x1000000fL
  562. #error "too old"
  563. #endif
  564. ], [],
  565. [ : ],
  566. [ AC_ERROR([OpenSSL is too old. We require 1.0.0 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  567. AC_TRY_COMPILE([
  568. #include <openssl/opensslv.h>
  569. #include <openssl/evp.h>
  570. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  571. #error "no ECC"
  572. #endif
  573. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  574. #error "curves unavailable"
  575. #endif
  576. ], [],
  577. [ : ],
  578. [ AC_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  579. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  580. [#include <openssl/ssl.h>
  581. ])
  582. AC_CHECK_FUNCS([ \
  583. SSL_SESSION_get_master_key \
  584. SSL_get_server_random \
  585. SSL_get_client_ciphers \
  586. SSL_get_client_random \
  587. SSL_CIPHER_find \
  588. TLS_method
  589. ])
  590. dnl Check if OpenSSL has scrypt implementation.
  591. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  592. LIBS="$save_LIBS"
  593. LDFLAGS="$save_LDFLAGS"
  594. CPPFLAGS="$save_CPPFLAGS"
  595. dnl ------------------------------------------------------
  596. dnl Where do you live, zlib? And how do we call you?
  597. tor_zlib_pkg_redhat="zlib"
  598. tor_zlib_pkg_debian="zlib1g"
  599. tor_zlib_devpkg_redhat="zlib-devel"
  600. tor_zlib_devpkg_debian="zlib1g-dev"
  601. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  602. [#include <zlib.h>],
  603. [const char * zlibVersion(void);],
  604. [zlibVersion(); exit(0);], [--with-zlib-dir],
  605. [/opt/zlib])
  606. if test "$enable_static_zlib" = "yes"; then
  607. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  608. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  609. using --enable-static-zlib")
  610. else
  611. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  612. fi
  613. else
  614. TOR_ZLIB_LIBS="-lz"
  615. fi
  616. AC_SUBST(TOR_ZLIB_LIBS)
  617. dnl ----------------------------------------------------------------------
  618. dnl Check if libcap is available for capabilities.
  619. tor_cap_pkg_debian="libcap2"
  620. tor_cap_pkg_redhat="libcap"
  621. tor_cap_devpkg_debian="libcap-dev"
  622. tor_cap_devpkg_redhat="libcap-devel"
  623. AC_CHECK_LIB([cap], [cap_init], [],
  624. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  625. )
  626. AC_CHECK_FUNCS(cap_set_proc)
  627. dnl ---------------------------------------------------------------------
  628. dnl Now that we know about our major libraries, we can check for compiler
  629. dnl and linker hardening options. We need to do this with the libraries known,
  630. dnl since sometimes the linker will like an option but not be willing to
  631. dnl use it with a build of a library.
  632. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  633. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  634. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  635. #if !defined(__clang__)
  636. #error
  637. #endif])], have_clang=yes, have_clang=no)
  638. if test x$enable_gcc_hardening != xno; then
  639. CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
  640. if test x$have_clang = xyes; then
  641. TOR_CHECK_CFLAGS(-Qunused-arguments)
  642. fi
  643. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  644. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  645. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  646. m4_ifdef([AS_VAR_IF],[
  647. AS_VAR_IF(can_compile, [yes],
  648. AS_VAR_IF(can_link, [yes],
  649. [],
  650. 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.)]))
  651. )])
  652. AS_VAR_POPDEF([can_link])
  653. AS_VAR_POPDEF([can_compile])
  654. TOR_CHECK_CFLAGS(-Wstack-protector)
  655. TOR_CHECK_CFLAGS(-fwrapv)
  656. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  657. if test "$bwin32" = "false"; then
  658. TOR_CHECK_CFLAGS(-fPIE)
  659. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  660. fi
  661. fi
  662. if test x$enable_expensive_hardening = xyes ; then
  663. TOR_CHECK_CFLAGS([-fsanitize=address])
  664. TOR_CHECK_CFLAGS([-fsanitize=undefined])
  665. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  666. fi
  667. if test x$enable_linker_hardening != xno; then
  668. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  669. fi
  670. # For backtrace support
  671. TOR_CHECK_LDFLAGS(-rdynamic)
  672. dnl ------------------------------------------------------
  673. dnl Now see if we have a -fomit-frame-pointer compiler option.
  674. saved_CFLAGS="$CFLAGS"
  675. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  676. F_OMIT_FRAME_POINTER=''
  677. if test "$saved_CFLAGS" != "$CFLAGS"; then
  678. if test x$enable_expensive_hardening != xyes ; then
  679. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  680. fi
  681. fi
  682. CFLAGS="$saved_CFLAGS"
  683. AC_SUBST(F_OMIT_FRAME_POINTER)
  684. dnl ------------------------------------------------------
  685. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  686. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  687. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  688. dnl code will work.
  689. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  690. dnl ============================================================
  691. dnl Check for libseccomp
  692. if test "x$enable_seccomp" != "xno"; then
  693. AC_CHECK_HEADERS([seccomp.h])
  694. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  695. fi
  696. dnl ============================================================
  697. dnl Check for libscrypt
  698. if test "x$enable_libscrypt" != "xno"; then
  699. AC_CHECK_HEADERS([libscrypt.h])
  700. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  701. fi
  702. dnl ============================================================
  703. dnl We need an implementation of curve25519.
  704. dnl set these defaults.
  705. build_curve25519_donna=no
  706. build_curve25519_donna_c64=no
  707. use_curve25519_donna=no
  708. use_curve25519_nacl=no
  709. CURVE25519_LIBS=
  710. dnl The best choice is using curve25519-donna-c64, but that requires
  711. dnl that we
  712. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  713. tor_cv_can_use_curve25519_donna_c64,
  714. [AC_RUN_IFELSE(
  715. [AC_LANG_PROGRAM([dnl
  716. #include <stdint.h>
  717. typedef unsigned uint128_t __attribute__((mode(TI)));
  718. int func(uint64_t a, uint64_t b) {
  719. uint128_t c = ((uint128_t)a) * b;
  720. int ok = ((uint64_t)(c>>96)) == 522859 &&
  721. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  722. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  723. (((uint64_t)(c))&0xffffffffL) == 0;
  724. return ok;
  725. }
  726. ], [dnl
  727. int ok = func( ((uint64_t)2000000000) * 1000000000,
  728. ((uint64_t)1234567890) << 24);
  729. return !ok;
  730. ])],
  731. [tor_cv_can_use_curve25519_donna_c64=yes],
  732. [tor_cv_can_use_curve25519_donna_c64=no],
  733. [AC_LINK_IFELSE(
  734. [AC_LANG_PROGRAM([dnl
  735. #include <stdint.h>
  736. typedef unsigned uint128_t __attribute__((mode(TI)));
  737. int func(uint64_t a, uint64_t b) {
  738. uint128_t c = ((uint128_t)a) * b;
  739. int ok = ((uint64_t)(c>>96)) == 522859 &&
  740. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  741. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  742. (((uint64_t)(c))&0xffffffffL) == 0;
  743. return ok;
  744. }
  745. ], [dnl
  746. int ok = func( ((uint64_t)2000000000) * 1000000000,
  747. ((uint64_t)1234567890) << 24);
  748. return !ok;
  749. ])],
  750. [tor_cv_can_use_curve25519_donna_c64=cross],
  751. [tor_cv_can_use_curve25519_donna_c64=no])])])
  752. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  753. nacl/crypto_scalarmult_curve25519.h])
  754. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  755. tor_cv_can_use_curve25519_nacl,
  756. [tor_saved_LIBS="$LIBS"
  757. LIBS="$LIBS -lnacl"
  758. AC_LINK_IFELSE(
  759. [AC_LANG_PROGRAM([dnl
  760. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  761. #include <crypto_scalarmult_curve25519.h>
  762. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  763. #include <nacl/crypto_scalarmult_curve25519.h>
  764. #endif
  765. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  766. #error Hey, this is the reference implementation! That's not fast.
  767. #endif
  768. ], [
  769. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  770. ])], [tor_cv_can_use_curve25519_nacl=yes],
  771. [tor_cv_can_use_curve25519_nacl=no])
  772. LIBS="$tor_saved_LIBS" ])
  773. dnl Okay, now we need to figure out which one to actually use. Fall back
  774. dnl to curve25519-donna.c
  775. if test x$tor_cv_can_use_curve25519_donna_c64 != xno; then
  776. build_curve25519_donna_c64=yes
  777. use_curve25519_donna=yes
  778. elif test x$tor_cv_can_use_curve25519_nacl = xyes; then
  779. use_curve25519_nacl=yes
  780. CURVE25519_LIBS=-lnacl
  781. else
  782. build_curve25519_donna=yes
  783. use_curve25519_donna=yes
  784. fi
  785. if test x$use_curve25519_donna = xyes; then
  786. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  787. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  788. fi
  789. if test x$use_curve25519_nacl = xyes; then
  790. AC_DEFINE(USE_CURVE25519_NACL, 1,
  791. [Defined if we should use a curve25519 from nacl])
  792. fi
  793. AM_CONDITIONAL(BUILD_CURVE25519_DONNA, test x$build_curve25519_donna = xyes)
  794. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64, test x$build_curve25519_donna_c64 = xyes)
  795. AC_SUBST(CURVE25519_LIBS)
  796. dnl Make sure to enable support for large off_t if available.
  797. AC_SYS_LARGEFILE
  798. AC_CHECK_HEADERS(
  799. assert.h \
  800. errno.h \
  801. fcntl.h \
  802. signal.h \
  803. string.h \
  804. sys/capability.h \
  805. sys/fcntl.h \
  806. sys/stat.h \
  807. sys/time.h \
  808. sys/types.h \
  809. time.h \
  810. unistd.h
  811. , , 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.))
  812. dnl These headers are not essential
  813. AC_CHECK_HEADERS(
  814. arpa/inet.h \
  815. crt_externs.h \
  816. execinfo.h \
  817. grp.h \
  818. ifaddrs.h \
  819. inttypes.h \
  820. limits.h \
  821. linux/types.h \
  822. machine/limits.h \
  823. malloc.h \
  824. malloc/malloc.h \
  825. malloc_np.h \
  826. netdb.h \
  827. netinet/in.h \
  828. netinet/in6.h \
  829. pwd.h \
  830. readpassphrase.h \
  831. stdint.h \
  832. sys/eventfd.h \
  833. sys/file.h \
  834. sys/ioctl.h \
  835. sys/limits.h \
  836. sys/mman.h \
  837. sys/param.h \
  838. sys/prctl.h \
  839. sys/resource.h \
  840. sys/select.h \
  841. sys/socket.h \
  842. sys/statvfs.h \
  843. sys/syscall.h \
  844. sys/sysctl.h \
  845. sys/syslimits.h \
  846. sys/time.h \
  847. sys/types.h \
  848. sys/un.h \
  849. sys/utime.h \
  850. sys/wait.h \
  851. syslog.h \
  852. utime.h
  853. )
  854. AC_CHECK_HEADERS(sys/param.h)
  855. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  856. [#ifdef HAVE_SYS_TYPES_H
  857. #include <sys/types.h>
  858. #endif
  859. #ifdef HAVE_SYS_SOCKET_H
  860. #include <sys/socket.h>
  861. #endif])
  862. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  863. [#ifdef HAVE_SYS_TYPES_H
  864. #include <sys/types.h>
  865. #endif
  866. #ifdef HAVE_SYS_SOCKET_H
  867. #include <sys/socket.h>
  868. #endif
  869. #ifdef HAVE_NET_IF_H
  870. #include <net/if.h>
  871. #endif
  872. #ifdef HAVE_NETINET_IN_H
  873. #include <netinet/in.h>
  874. #endif])
  875. AC_CHECK_HEADERS(linux/if.h,[],[],
  876. [
  877. #ifdef HAVE_SYS_SOCKET_H
  878. #include <sys/socket.h>
  879. #endif
  880. ])
  881. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  882. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  883. [#ifdef HAVE_SYS_TYPES_H
  884. #include <sys/types.h>
  885. #endif
  886. #ifdef HAVE_SYS_SOCKET_H
  887. #include <sys/socket.h>
  888. #endif
  889. #ifdef HAVE_LIMITS_H
  890. #include <limits.h>
  891. #endif
  892. #ifdef HAVE_LINUX_TYPES_H
  893. #include <linux/types.h>
  894. #endif
  895. #ifdef HAVE_NETINET_IN6_H
  896. #include <netinet/in6.h>
  897. #endif
  898. #ifdef HAVE_NETINET_IN_H
  899. #include <netinet/in.h>
  900. #endif])
  901. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  902. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  903. [#ifdef HAVE_SYS_TYPES_H
  904. #include <sys/types.h>
  905. #endif
  906. #ifdef HAVE_SYS_SOCKET_H
  907. #include <sys/socket.h>
  908. #endif
  909. #ifdef HAVE_LIMITS_H
  910. #include <limits.h>
  911. #endif
  912. #ifdef HAVE_LINUX_TYPES_H
  913. #include <linux/types.h>
  914. #endif
  915. #ifdef HAVE_NETINET_IN6_H
  916. #include <netinet/in6.h>
  917. #endif
  918. #ifdef HAVE_NETINET_IN_H
  919. #include <netinet/in.h>
  920. #endif
  921. #ifdef HAVE_LINUX_IF_H
  922. #include <linux/if.h>
  923. #endif])
  924. if test x$transparent = xtrue ; then
  925. transparent_ok=0
  926. if test x$net_if_found = x1 && test x$net_pfvar_found = x1 ; then
  927. transparent_ok=1
  928. fi
  929. if test x$linux_netfilter_ipv4 = x1 ; then
  930. transparent_ok=1
  931. fi
  932. if test x$linux_netfilter_ipv6_ip6_tables = x1 ; then
  933. transparent_ok=1
  934. fi
  935. if test x$transparent_ok = x1 ; then
  936. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  937. case $host in
  938. *-*-openbsd* | *-*-bitrig*)
  939. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  940. esac
  941. else
  942. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  943. fi
  944. fi
  945. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  946. [#ifdef HAVE_SYS_TYPES_H
  947. #include <sys/types.h>
  948. #endif
  949. #ifdef HAVE_SYS_TIME_H
  950. #include <sys/time.h>
  951. #endif])
  952. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  953. dnl Watch out.
  954. AC_CHECK_SIZEOF(int8_t)
  955. AC_CHECK_SIZEOF(int16_t)
  956. AC_CHECK_SIZEOF(int32_t)
  957. AC_CHECK_SIZEOF(int64_t)
  958. AC_CHECK_SIZEOF(uint8_t)
  959. AC_CHECK_SIZEOF(uint16_t)
  960. AC_CHECK_SIZEOF(uint32_t)
  961. AC_CHECK_SIZEOF(uint64_t)
  962. AC_CHECK_SIZEOF(intptr_t)
  963. AC_CHECK_SIZEOF(uintptr_t)
  964. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  965. AC_CHECK_SIZEOF(char)
  966. AC_CHECK_SIZEOF(short)
  967. AC_CHECK_SIZEOF(int)
  968. AC_CHECK_SIZEOF(long)
  969. AC_CHECK_SIZEOF(long long)
  970. AC_CHECK_SIZEOF(__int64)
  971. AC_CHECK_SIZEOF(void *)
  972. AC_CHECK_SIZEOF(time_t)
  973. AC_CHECK_SIZEOF(size_t)
  974. AC_CHECK_SIZEOF(pid_t)
  975. AC_CHECK_TYPES([uint, u_char, ssize_t])
  976. AC_PC_FROM_UCONTEXT([:])
  977. dnl used to include sockaddr_storage, but everybody has that.
  978. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  979. [#ifdef HAVE_SYS_TYPES_H
  980. #include <sys/types.h>
  981. #endif
  982. #ifdef HAVE_NETINET_IN_H
  983. #include <netinet/in.h>
  984. #endif
  985. #ifdef HAVE_NETINET_IN6_H
  986. #include <netinet/in6.h>
  987. #endif
  988. #ifdef HAVE_SYS_SOCKET_H
  989. #include <sys/socket.h>
  990. #endif
  991. #ifdef _WIN32
  992. #define _WIN32_WINNT 0x0501
  993. #define WIN32_LEAN_AND_MEAN
  994. #include <winsock2.h>
  995. #include <ws2tcpip.h>
  996. #endif
  997. ])
  998. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  999. [#ifdef HAVE_SYS_TYPES_H
  1000. #include <sys/types.h>
  1001. #endif
  1002. #ifdef HAVE_NETINET_IN_H
  1003. #include <netinet/in.h>
  1004. #endif
  1005. #ifdef HAVE_NETINET_IN6_H
  1006. #include <netinet/in6.h>
  1007. #endif
  1008. #ifdef HAVE_SYS_SOCKET_H
  1009. #include <sys/socket.h>
  1010. #endif
  1011. #ifdef _WIN32
  1012. #define _WIN32_WINNT 0x0501
  1013. #define WIN32_LEAN_AND_MEAN
  1014. #include <winsock2.h>
  1015. #include <ws2tcpip.h>
  1016. #endif
  1017. ])
  1018. AC_CHECK_TYPES([rlim_t], , ,
  1019. [#ifdef HAVE_SYS_TYPES_H
  1020. #include <sys/types.h>
  1021. #endif
  1022. #ifdef HAVE_SYS_TIME_H
  1023. #include <sys/time.h>
  1024. #endif
  1025. #ifdef HAVE_SYS_RESOURCE_H
  1026. #include <sys/resource.h>
  1027. #endif
  1028. ])
  1029. AX_CHECK_SIGN([time_t],
  1030. [ AC_DEFINE(TIME_T_IS_SIGNED, 1, [Define if time_t is signed]) ],
  1031. [ : ], [
  1032. #ifdef HAVE_SYS_TYPES_H
  1033. #include <sys/types.h>
  1034. #endif
  1035. #ifdef HAVE_SYS_TIME_H
  1036. #include <sys/time.h>
  1037. #endif
  1038. #ifdef HAVE_TIME_H
  1039. #include <time.h>
  1040. #endif
  1041. ])
  1042. if test "$ax_cv_decl_time_t_signed" = no; then
  1043. AC_MSG_WARN([You have an unsigned time_t; some things will probably break. Please tell the Tor developers about your interesting platform.])
  1044. fi
  1045. AX_CHECK_SIGN([size_t],
  1046. [ tor_cv_size_t_signed=yes ],
  1047. [ tor_cv_size_t_signed=no ], [
  1048. #ifdef HAVE_SYS_TYPES_H
  1049. #include <sys/types.h>
  1050. #endif
  1051. ])
  1052. if test "$ax_cv_decl_size_t_signed" = yes; then
  1053. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1054. fi
  1055. AX_CHECK_SIGN([enum always],
  1056. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1057. [ : ], [
  1058. enum always { AAA, BBB, CCC };
  1059. ])
  1060. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1061. #ifdef HAVE_SYS_SOCKET_H
  1062. #include <sys/socket.h>
  1063. #endif
  1064. ])
  1065. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1066. AC_CHECK_SIZEOF(cell_t)
  1067. # Now make sure that NULL can be represented as zero bytes.
  1068. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1069. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1070. [[#include <stdlib.h>
  1071. #include <string.h>
  1072. #include <stdio.h>
  1073. #ifdef HAVE_STDDEF_H
  1074. #include <stddef.h>
  1075. #endif
  1076. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1077. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1078. [tor_cv_null_is_zero=yes],
  1079. [tor_cv_null_is_zero=no],
  1080. [tor_cv_null_is_zero=cross])])
  1081. if test "$tor_cv_null_is_zero" = cross ; then
  1082. # Cross-compiling; let's hope that the target isn't raving mad.
  1083. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1084. fi
  1085. if test "$tor_cv_null_is_zero" != no; then
  1086. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1087. [Define to 1 iff memset(0) sets pointers to NULL])
  1088. fi
  1089. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1090. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1091. [[#include <stdlib.h>
  1092. #include <string.h>
  1093. #include <stdio.h>
  1094. #ifdef HAVE_STDDEF_H
  1095. #include <stddef.h>
  1096. #endif
  1097. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1098. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1099. [tor_cv_dbl0_is_zero=yes],
  1100. [tor_cv_dbl0_is_zero=no],
  1101. [tor_cv_dbl0_is_zero=cross])])
  1102. if test "$tor_cv_dbl0_is_zero" = cross ; then
  1103. # Cross-compiling; let's hope that the target isn't raving mad.
  1104. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1105. fi
  1106. if test "$tor_cv_dbl0_is_zero" != no; then
  1107. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1108. [Define to 1 iff memset(0) sets doubles to 0.0])
  1109. fi
  1110. # And what happens when we malloc zero?
  1111. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1112. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1113. [[#include <stdlib.h>
  1114. #include <string.h>
  1115. #include <stdio.h>
  1116. #ifdef HAVE_STDDEF_H
  1117. #include <stddef.h>
  1118. #endif
  1119. int main () { return malloc(0)?0:1; }]])],
  1120. [tor_cv_malloc_zero_works=yes],
  1121. [tor_cv_malloc_zero_works=no],
  1122. [tor_cv_malloc_zero_works=cross])])
  1123. if test "$tor_cv_malloc_zero_works" = cross; then
  1124. # Cross-compiling; let's hope that the target isn't raving mad.
  1125. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1126. fi
  1127. if test "$tor_cv_malloc_zero_works" = yes; then
  1128. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1129. [Define to 1 iff malloc(0) returns a pointer])
  1130. fi
  1131. # whether we seem to be in a 2s-complement world.
  1132. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1133. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1134. [[int main () { int problem = ((-99) != (~99)+1);
  1135. return problem ? 1 : 0; }]])],
  1136. [tor_cv_twos_complement=yes],
  1137. [tor_cv_twos_complement=no],
  1138. [tor_cv_twos_complement=cross])])
  1139. if test "$tor_cv_twos_complement" = cross ; then
  1140. # Cross-compiling; let's hope that the target isn't raving mad.
  1141. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1142. fi
  1143. if test "$tor_cv_twos_complement" != no ; then
  1144. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1145. [Define to 1 iff we represent negative integers with two's complement])
  1146. fi
  1147. # What does shifting a negative value do?
  1148. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1149. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1150. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1151. [tor_cv_sign_extend=yes],
  1152. [tor_cv_sign_extend=no],
  1153. [tor_cv_sign_extend=cross])])
  1154. if test "$tor_cv_sign_extend" = cross ; then
  1155. # Cross-compiling; let's hope that the target isn't raving mad.
  1156. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1157. fi
  1158. if test "$tor_cv_sign_extend" != no ; then
  1159. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1160. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1161. fi
  1162. # Whether we should use the dmalloc memory allocation debugging library.
  1163. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1164. AC_ARG_WITH(dmalloc,
  1165. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1166. [if [[ "$withval" = "yes" ]]; then
  1167. dmalloc=1
  1168. AC_MSG_RESULT(yes)
  1169. else
  1170. dmalloc=1
  1171. AC_MSG_RESULT(no)
  1172. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1173. )
  1174. if [[ $dmalloc -eq 1 ]]; then
  1175. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1176. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1177. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1178. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1179. fi
  1180. AC_ARG_WITH(tcmalloc,
  1181. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1182. [ tcmalloc=yes ], [ tcmalloc=no ])
  1183. if test x$tcmalloc = xyes ; then
  1184. LDFLAGS="-ltcmalloc $LDFLAGS"
  1185. fi
  1186. using_custom_malloc=no
  1187. if test x$enable_openbsd_malloc = xyes ; then
  1188. using_custom_malloc=yes
  1189. fi
  1190. if test x$tcmalloc = xyes ; then
  1191. using_custom_malloc=yes
  1192. fi
  1193. if test $using_custom_malloc = no ; then
  1194. AC_CHECK_FUNCS(mallinfo)
  1195. fi
  1196. # By default, we're going to assume we don't have mlockall()
  1197. # bionic and other platforms have various broken mlockall subsystems.
  1198. # Some systems don't have a working mlockall, some aren't linkable,
  1199. # and some have it but don't declare it.
  1200. AC_CHECK_FUNCS(mlockall)
  1201. AC_CHECK_DECLS([mlockall], , , [
  1202. #ifdef HAVE_SYS_MMAN_H
  1203. #include <sys/mman.h>
  1204. #endif])
  1205. # Allow user to specify an alternate syslog facility
  1206. AC_ARG_WITH(syslog-facility,
  1207. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1208. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1209. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1210. AC_SUBST(LOGFACILITY)
  1211. # Check if we have getresuid and getresgid
  1212. AC_CHECK_FUNCS(getresuid getresgid)
  1213. # Check for gethostbyname_r in all its glorious incompatible versions.
  1214. # (This logic is based on that in Python's configure.in)
  1215. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1216. [Define this if you have any gethostbyname_r()])
  1217. AC_CHECK_FUNC(gethostbyname_r, [
  1218. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1219. OLD_CFLAGS=$CFLAGS
  1220. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1221. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1222. #include <netdb.h>
  1223. ], [[
  1224. char *cp1, *cp2;
  1225. struct hostent *h1, *h2;
  1226. int i1, i2;
  1227. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1228. ]])],[
  1229. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1230. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1231. [Define this if gethostbyname_r takes 6 arguments])
  1232. AC_MSG_RESULT(6)
  1233. ], [
  1234. AC_TRY_COMPILE([
  1235. #include <netdb.h>
  1236. ], [
  1237. char *cp1, *cp2;
  1238. struct hostent *h1;
  1239. int i1, i2;
  1240. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1241. ], [
  1242. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1243. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1244. [Define this if gethostbyname_r takes 5 arguments])
  1245. AC_MSG_RESULT(5)
  1246. ], [
  1247. AC_TRY_COMPILE([
  1248. #include <netdb.h>
  1249. ], [
  1250. char *cp1;
  1251. struct hostent *h1;
  1252. struct hostent_data hd;
  1253. (void) gethostbyname_r(cp1,h1,&hd);
  1254. ], [
  1255. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1256. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1257. [Define this if gethostbyname_r takes 3 arguments])
  1258. AC_MSG_RESULT(3)
  1259. ], [
  1260. AC_MSG_RESULT(0)
  1261. ])
  1262. ])
  1263. ])
  1264. CFLAGS=$OLD_CFLAGS
  1265. ])
  1266. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1267. tor_cv_have_func_macro,
  1268. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1269. #include <stdio.h>
  1270. int main(int c, char **v) { puts(__func__); }])],
  1271. tor_cv_have_func_macro=yes,
  1272. tor_cv_have_func_macro=no))
  1273. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1274. tor_cv_have_FUNC_macro,
  1275. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1276. #include <stdio.h>
  1277. int main(int c, char **v) { puts(__FUNC__); }])],
  1278. tor_cv_have_FUNC_macro=yes,
  1279. tor_cv_have_FUNC_macro=no))
  1280. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1281. tor_cv_have_FUNCTION_macro,
  1282. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1283. #include <stdio.h>
  1284. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1285. tor_cv_have_FUNCTION_macro=yes,
  1286. tor_cv_have_FUNCTION_macro=no))
  1287. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1288. tor_cv_have_environ_declared,
  1289. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1290. /* We define _GNU_SOURCE here because it is also defined in compat.c.
  1291. * Without it environ doesn't get declared. */
  1292. #define _GNU_SOURCE
  1293. #ifdef HAVE_UNISTD_H
  1294. #include <unistd.h>
  1295. #endif
  1296. #include <stdlib.h>
  1297. int main(int c, char **v) { char **t = environ; }])],
  1298. tor_cv_have_environ_declared=yes,
  1299. tor_cv_have_environ_declared=no))
  1300. if test "$tor_cv_have_func_macro" = 'yes'; then
  1301. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1302. fi
  1303. if test "$tor_cv_have_FUNC_macro" = 'yes'; then
  1304. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1305. fi
  1306. if test "$tor_cv_have_FUNCTION_macro" = 'yes'; then
  1307. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1308. [Defined if the compiler supports __FUNCTION__])
  1309. fi
  1310. if test "$tor_cv_have_environ_declared" = 'yes'; then
  1311. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1312. [Defined if we have extern char **environ already declared])
  1313. fi
  1314. # $prefix stores the value of the --prefix command line option, or
  1315. # NONE if the option wasn't set. In the case that it wasn't set, make
  1316. # it be the default, so that we can use it to expand directories now.
  1317. if test "x$prefix" = "xNONE"; then
  1318. prefix=$ac_default_prefix
  1319. fi
  1320. # and similarly for $exec_prefix
  1321. if test "x$exec_prefix" = "xNONE"; then
  1322. exec_prefix=$prefix
  1323. fi
  1324. if test "x$BUILDDIR" = "x"; then
  1325. BUILDDIR=`pwd`
  1326. fi
  1327. AC_SUBST(BUILDDIR)
  1328. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1329. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1330. if test "x$CONFDIR" = "x"; then
  1331. CONFDIR=`eval echo $sysconfdir/tor`
  1332. fi
  1333. AC_SUBST(CONFDIR)
  1334. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1335. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1336. BINDIR=`eval echo $bindir`
  1337. AC_SUBST(BINDIR)
  1338. LOCALSTATEDIR=`eval echo $localstatedir`
  1339. AC_SUBST(LOCALSTATEDIR)
  1340. if test "$bwin32" = true; then
  1341. # Test if the linker supports the --nxcompat and --dynamicbase options
  1342. # for Windows
  1343. save_LDFLAGS="$LDFLAGS"
  1344. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1345. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1346. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1347. [AC_MSG_RESULT([yes])]
  1348. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1349. [AC_MSG_RESULT([no])]
  1350. )
  1351. LDFLAGS="$save_LDFLAGS"
  1352. fi
  1353. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1354. # than autoconf's macros like.
  1355. if test "$GCC" = yes; then
  1356. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1357. # accident waiting to happen.
  1358. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1359. else
  1360. # Override optimization level for non-gcc compilers
  1361. CFLAGS="$CFLAGS -O"
  1362. enable_gcc_warnings=no
  1363. enable_gcc_warnings_advisory=no
  1364. fi
  1365. # OS X Lion started deprecating the system openssl. Let's just disable
  1366. # all deprecation warnings on OS X. Also, to potentially make the binary
  1367. # a little smaller, let's enable dead_strip.
  1368. case "$host_os" in
  1369. darwin*)
  1370. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1371. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1372. esac
  1373. # Add some more warnings which we use in development but not in the
  1374. # released versions. (Some relevant gcc versions can't handle these.)
  1375. if test x$enable_gcc_warnings = xyes || test x$enable_gcc_warnings_advisory = xyes; then
  1376. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1377. #if !defined(__GNUC__) || (__GNUC__ < 4)
  1378. #error
  1379. #endif])], have_gcc4=yes, have_gcc4=no)
  1380. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1381. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)
  1382. #error
  1383. #endif])], have_gcc42=yes, have_gcc42=no)
  1384. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1385. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
  1386. #error
  1387. #endif])], have_gcc43=yes, have_gcc43=no)
  1388. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1389. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)
  1390. #error
  1391. #endif])], have_gcc46=yes, have_gcc46=no)
  1392. save_CFLAGS="$CFLAGS"
  1393. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1394. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], have_shorten64_flag=yes,
  1395. have_shorten64_flag=no)
  1396. CFLAGS="$save_CFLAGS"
  1397. case $host in
  1398. *-*-openbsd* | *-*-bitrig*)
  1399. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1400. # That's fine, except that the headers don't pass -Wredundant-decls.
  1401. # Therefore, let's disable -Wsystem-headers when we're building
  1402. # with maximal warnings on OpenBSD.
  1403. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1404. esac
  1405. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1406. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1407. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1408. CFLAGS="$CFLAGS -Wwrite-strings -Wmissing-declarations -Wredundant-decls"
  1409. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1410. if test x$enable_gcc_warnings = xyes; then
  1411. CFLAGS="$CFLAGS -Werror"
  1412. fi
  1413. # Disabled, so we can use mallinfo(): -Waggregate-return
  1414. if test x$have_gcc4 = xyes ; then
  1415. # These warnings break gcc 3.3.5 and work on gcc 4.0.2
  1416. CFLAGS="$CFLAGS -Winit-self -Wmissing-field-initializers -Wold-style-definition"
  1417. fi
  1418. if test x$have_gcc42 = xyes ; then
  1419. # These warnings break gcc 4.0.2 and work on gcc 4.2
  1420. # XXXX020 See if any of these work with earlier versions.
  1421. CFLAGS="$CFLAGS -Waddress -Wmissing-noreturn -Wstrict-overflow=1"
  1422. # We used to use -Wstrict-overflow=5, but that breaks us heavily under 4.3.
  1423. fi
  1424. if test x$have_gcc42 = xyes && test x$have_clang = xno; then
  1425. # These warnings break gcc 4.0.2 and clang, but work on gcc 4.2
  1426. CFLAGS="$CFLAGS -Wnormalized=id -Woverride-init"
  1427. fi
  1428. if test x$have_gcc43 = xyes ; then
  1429. # These warnings break gcc 4.2 and work on gcc 4.3
  1430. # XXXX020 See if any of these work with earlier versions.
  1431. CFLAGS="$CFLAGS -Wextra -Warray-bounds"
  1432. fi
  1433. if test x$have_gcc46 = xyes ; then
  1434. # This warning was added in gcc 4.3, but it appears to generate
  1435. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1436. CFLAGS="$CFLAGS -Wlogical-op"
  1437. fi
  1438. if test x$have_shorten64_flag = xyes ; then
  1439. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1440. fi
  1441. ##This will break the world on some 64-bit architectures
  1442. # CFLAGS="$CFLAGS -Winline"
  1443. fi
  1444. if test "$enable_coverage" = yes && test "$have_clang" = "no"; then
  1445. case "$host_os" in
  1446. darwin*)
  1447. 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.])
  1448. esac
  1449. fi
  1450. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1451. AC_CONFIG_FILES([
  1452. Doxyfile
  1453. Makefile
  1454. contrib/dist/suse/tor.sh
  1455. contrib/operator-tools/tor.logrotate
  1456. contrib/dist/tor.sh
  1457. contrib/dist/torctl
  1458. contrib/dist/tor.service
  1459. src/config/torrc.sample
  1460. src/config/torrc.minimal
  1461. scripts/maint/checkOptionDocs.pl
  1462. scripts/maint/updateVersions.pl
  1463. ])
  1464. if test x$asciidoc = xtrue && test "$ASCIIDOC" = "none" ; then
  1465. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1466. for file in $regular_mans ; do
  1467. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1468. echo "==================================";
  1469. echo;
  1470. echo "Building Tor has failed since manpages cannot be built.";
  1471. echo;
  1472. echo "You need asciidoc installed to be able to build the manpages.";
  1473. echo "To build without manpages, use the --disable-asciidoc argument";
  1474. echo "when calling configure.";
  1475. echo;
  1476. echo "==================================";
  1477. exit 1;
  1478. fi
  1479. done
  1480. fi
  1481. AC_OUTPUT