configure.ac 58 KB

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  1. dnl Copyright (c) 2001-2004, Roger Dingledine
  2. dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
  3. dnl Copyright (c) 2007-2015, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_PREREQ([2.63])
  6. AC_INIT([tor],[0.2.9.2-alpha])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_USE_SYSTEM_EXTENSIONS
  16. AC_CANONICAL_HOST
  17. PKG_PROG_PKG_CONFIG
  18. if test -f "/etc/redhat-release"; then
  19. if test -f "/usr/kerberos/include"; then
  20. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  21. fi
  22. fi
  23. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  24. # the += operator on it in src/or/Makefile.am
  25. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  28. AC_ARG_ENABLE(static-openssl,
  29. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  30. AC_ARG_ENABLE(static-libevent,
  31. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  32. AC_ARG_ENABLE(static-zlib,
  33. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  34. AC_ARG_ENABLE(static-tor,
  35. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  36. AC_ARG_ENABLE(unittests,
  37. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  38. AC_ARG_ENABLE(coverage,
  39. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  40. AC_ARG_ENABLE(asserts-in-tests,
  41. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  42. AC_ARG_ENABLE(system-torrc,
  43. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  44. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  45. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  46. fi
  47. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  48. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  49. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  50. if test "$enable_static_tor" = "yes"; then
  51. enable_static_libevent="yes";
  52. enable_static_openssl="yes";
  53. enable_static_zlib="yes";
  54. CFLAGS="$CFLAGS -static"
  55. fi
  56. if test "$enable_system_torrc" = "no"; then
  57. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  58. [Defined if we're not going to look for a torrc in SYSCONF])
  59. fi
  60. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  61. AC_ARG_ENABLE(asciidoc,
  62. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  63. [case "${enableval}" in
  64. "yes") asciidoc=true ;;
  65. "no") asciidoc=false ;;
  66. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  67. esac], [asciidoc=true])
  68. # systemd notify support
  69. AC_ARG_ENABLE(systemd,
  70. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  71. [case "${enableval}" in
  72. "yes") systemd=true ;;
  73. "no") systemd=false ;;
  74. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  75. esac], [systemd=auto])
  76. # systemd support
  77. if test "x$enable_systemd" = "xno"; then
  78. have_systemd=no;
  79. else
  80. PKG_CHECK_MODULES(SYSTEMD,
  81. [libsystemd-daemon],
  82. have_systemd=yes,
  83. have_systemd=no)
  84. if test "x$have_systemd" = "xno"; then
  85. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  86. PKG_CHECK_MODULES(SYSTEMD,
  87. [libsystemd],
  88. have_systemd=yes,
  89. have_systemd=no)
  90. fi
  91. fi
  92. if test "x$have_systemd" = "xyes"; then
  93. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  94. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  95. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  96. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  97. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  98. fi
  99. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  100. AC_SUBST(TOR_SYSTEMD_LIBS)
  101. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  102. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  103. fi
  104. case "$host" in
  105. *-*-solaris* )
  106. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  107. ;;
  108. esac
  109. AC_ARG_ENABLE(gcc-warnings,
  110. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  111. AC_ARG_ENABLE(fatal-warnings,
  112. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  113. AC_ARG_ENABLE(gcc-warnings-advisory,
  114. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  115. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  116. AC_ARG_ENABLE(gcc-hardening,
  117. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  118. AC_ARG_ENABLE(expensive-hardening,
  119. AS_HELP_STRING(--enable-expensive-hardening, [enable more expensive compiler hardening; makes Tor slower]))
  120. dnl Linker hardening options
  121. dnl Currently these options are ELF specific - you can't use this with MacOSX
  122. AC_ARG_ENABLE(linker-hardening,
  123. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  124. AC_ARG_ENABLE(local-appdata,
  125. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  126. if test "$enable_local_appdata" = "yes"; then
  127. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  128. [Defined if we default to host local appdata paths on Windows])
  129. fi
  130. # Tor2web mode flag
  131. AC_ARG_ENABLE(tor2web-mode,
  132. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  133. [if test "x$enableval" = "xyes"; then
  134. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  135. fi])
  136. AC_ARG_ENABLE(tool-name-check,
  137. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  138. AC_ARG_ENABLE(seccomp,
  139. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  140. AC_ARG_ENABLE(libscrypt,
  141. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  142. dnl check for the correct "ar" when cross-compiling
  143. AN_MAKEVAR([AR], [AC_PROG_AR])
  144. AN_PROGRAM([ar], [AC_PROG_AR])
  145. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [ar])])
  146. AC_PROG_AR
  147. dnl Check whether the above macro has settled for a simply named tool even
  148. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  149. dnl because that will find any cc on the system, not only the cross-compiler,
  150. dnl and then verify that a binary built with this compiler runs on the
  151. dnl build system. It will then come to the false conclusion that we're not
  152. dnl cross-compiling.
  153. if test "x$enable_tool_name_check" != "xno"; then
  154. if test "x$ac_tool_warned" = "xyes"; then
  155. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  156. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  157. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  158. fi
  159. fi
  160. AC_PROG_CC
  161. AC_PROG_CPP
  162. AC_PROG_MAKE_SET
  163. AC_PROG_RANLIB
  164. AC_PATH_PROG([PERL], [perl])
  165. dnl autoconf 2.59 appears not to support AC_PROG_SED
  166. AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
  167. dnl check for asciidoc and a2x
  168. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  169. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  170. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  171. AM_CONDITIONAL(USE_FW_HELPER, test "x$natpmp" = "xtrue" || test "x$upnp" = "xtrue")
  172. AM_CONDITIONAL(NAT_PMP, test "x$natpmp" = "xtrue")
  173. AM_CONDITIONAL(MINIUPNPC, test "x$upnp" = "xtrue")
  174. AM_PROG_CC_C_O
  175. AC_PROG_CC_C99
  176. AC_ARG_VAR([PYTHON], [path to Python binary])
  177. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  178. if test "x$PYTHON" = "x"; then
  179. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  180. fi
  181. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  182. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  183. AC_C_FLEXIBLE_ARRAY_MEMBER
  184. ], [
  185. dnl Maybe we've got an old autoconf...
  186. AC_CACHE_CHECK([for flexible array members],
  187. tor_cv_c_flexarray,
  188. [AC_COMPILE_IFELSE(
  189. AC_LANG_PROGRAM([
  190. struct abc { int a; char b[]; };
  191. ], [
  192. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  193. def->b[0] = 33;
  194. ]),
  195. [tor_cv_c_flexarray=yes],
  196. [tor_cv_c_flexarray=no])])
  197. if test "$tor_cv_flexarray" = "yes"; then
  198. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  199. else
  200. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  201. fi
  202. ])
  203. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  204. tor_cv_c_c99_decl,
  205. [AC_COMPILE_IFELSE(
  206. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  207. [tor_cv_c_c99_decl=yes],
  208. [tor_cv_c_c99_decl=no] )])
  209. if test "$tor_cv_c_c99_decl" != "yes"; then
  210. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  211. fi
  212. AC_CACHE_CHECK([for working C99 designated initializers],
  213. tor_cv_c_c99_designated_init,
  214. [AC_COMPILE_IFELSE(
  215. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  216. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  217. [tor_cv_c_c99_designated_init=yes],
  218. [tor_cv_c_c99_designated_init=no] )])
  219. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  220. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  221. fi
  222. TORUSER=_tor
  223. AC_ARG_WITH(tor-user,
  224. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  225. [
  226. TORUSER=$withval
  227. ]
  228. )
  229. AC_SUBST(TORUSER)
  230. TORGROUP=_tor
  231. AC_ARG_WITH(tor-group,
  232. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  233. [
  234. TORGROUP=$withval
  235. ]
  236. )
  237. AC_SUBST(TORGROUP)
  238. dnl If _WIN32 is defined and non-zero, we are building for win32
  239. AC_MSG_CHECKING([for win32])
  240. AC_RUN_IFELSE([AC_LANG_SOURCE([
  241. int main(int c, char **v) {
  242. #ifdef _WIN32
  243. #if _WIN32
  244. return 0;
  245. #else
  246. return 1;
  247. #endif
  248. #else
  249. return 2;
  250. #endif
  251. }])],
  252. bwin32=true; AC_MSG_RESULT([yes]),
  253. bwin32=false; AC_MSG_RESULT([no]),
  254. bwin32=cross; AC_MSG_RESULT([cross])
  255. )
  256. if test "$bwin32" = "cross"; then
  257. AC_MSG_CHECKING([for win32 (cross)])
  258. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  259. #ifdef _WIN32
  260. int main(int c, char **v) {return 0;}
  261. #else
  262. #error
  263. int main(int c, char **v) {return x(y);}
  264. #endif
  265. ])],
  266. bwin32=true; AC_MSG_RESULT([yes]),
  267. bwin32=false; AC_MSG_RESULT([no]))
  268. fi
  269. AH_BOTTOM([
  270. #ifdef _WIN32
  271. /* Defined to access windows functions and definitions for >=WinXP */
  272. # ifndef WINVER
  273. # define WINVER 0x0501
  274. # endif
  275. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  276. # ifndef _WIN32_WINNT
  277. # define _WIN32_WINNT 0x0501
  278. # endif
  279. /* Defined to avoid including some windows headers as part of Windows.h */
  280. # ifndef WIN32_LEAN_AND_MEAN
  281. # define WIN32_LEAN_AND_MEAN 1
  282. # endif
  283. #endif
  284. ])
  285. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  286. dnl Enable C99 when compiling with MIPSpro
  287. AC_MSG_CHECKING([for MIPSpro compiler])
  288. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  289. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  290. #error
  291. return x(y);
  292. #endif
  293. ])],
  294. bmipspro=false; AC_MSG_RESULT(no),
  295. bmipspro=true; AC_MSG_RESULT(yes))
  296. if test "$bmipspro" = "true"; then
  297. CFLAGS="$CFLAGS -c99"
  298. fi
  299. AC_C_BIGENDIAN
  300. AC_SEARCH_LIBS(socket, [socket network])
  301. AC_SEARCH_LIBS(gethostbyname, [nsl])
  302. AC_SEARCH_LIBS(dlopen, [dl])
  303. AC_SEARCH_LIBS(inet_aton, [resolv])
  304. AC_SEARCH_LIBS(backtrace, [execinfo])
  305. saved_LIBS="$LIBS"
  306. AC_SEARCH_LIBS([clock_gettime], [rt])
  307. if test "$LIBS" != "$saved_LIBS"; then
  308. # Looks like we need -lrt for clock_gettime().
  309. have_rt=yes
  310. fi
  311. AC_SEARCH_LIBS(pthread_create, [pthread])
  312. AC_SEARCH_LIBS(pthread_detach, [pthread])
  313. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  314. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  315. AC_CHECK_FUNCS(
  316. _NSGetEnviron \
  317. RtlSecureZeroMemory \
  318. SecureZeroMemory \
  319. accept4 \
  320. backtrace \
  321. backtrace_symbols_fd \
  322. clock_gettime \
  323. eventfd \
  324. explicit_bzero \
  325. timingsafe_memcmp \
  326. flock \
  327. ftime \
  328. getaddrinfo \
  329. getentropy \
  330. getifaddrs \
  331. getpass \
  332. getrlimit \
  333. gettimeofday \
  334. gmtime_r \
  335. htonll \
  336. inet_aton \
  337. ioctl \
  338. issetugid \
  339. llround \
  340. localtime_r \
  341. lround \
  342. memmem \
  343. memset_s \
  344. pipe \
  345. pipe2 \
  346. prctl \
  347. readpassphrase \
  348. rint \
  349. sigaction \
  350. socketpair \
  351. statvfs \
  352. strlcat \
  353. strlcpy \
  354. strnlen \
  355. strptime \
  356. strtok_r \
  357. strtoull \
  358. sysconf \
  359. sysctl \
  360. truncate \
  361. uname \
  362. usleep \
  363. vasprintf \
  364. _vscprintf
  365. )
  366. if test "$bwin32" != "true"; then
  367. AC_CHECK_HEADERS(pthread.h)
  368. AC_CHECK_FUNCS(pthread_create)
  369. AC_CHECK_FUNCS(pthread_condattr_setclock)
  370. fi
  371. if test "$bwin32" = "true"; then
  372. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  373. #include <windows.h>
  374. #include <conio.h>
  375. #include <wchar.h>
  376. ])
  377. fi
  378. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  379. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  380. dnl ------------------------------------------------------
  381. dnl Where do you live, libevent? And how do we call you?
  382. if test "$bwin32" = "true"; then
  383. TOR_LIB_WS32=-lws2_32
  384. TOR_LIB_IPHLPAPI=-liphlpapi
  385. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  386. # think it's actually necessary.
  387. TOR_LIB_GDI=-lgdi32
  388. else
  389. TOR_LIB_WS32=
  390. TOR_LIB_GDI=
  391. fi
  392. AC_SUBST(TOR_LIB_WS32)
  393. AC_SUBST(TOR_LIB_GDI)
  394. AC_SUBST(TOR_LIB_IPHLPAPI)
  395. tor_libevent_pkg_redhat="libevent"
  396. tor_libevent_pkg_debian="libevent-dev"
  397. tor_libevent_devpkg_redhat="libevent-devel"
  398. tor_libevent_devpkg_debian="libevent-dev"
  399. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  400. dnl linking for static builds.
  401. STATIC_LIBEVENT_FLAGS=""
  402. if test "$enable_static_libevent" = "yes"; then
  403. if test "$have_rt" = "yes"; then
  404. STATIC_LIBEVENT_FLAGS=" -lrt "
  405. fi
  406. fi
  407. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  408. #ifdef _WIN32
  409. #include <winsock2.h>
  410. #endif
  411. #include <sys/time.h>
  412. #include <sys/types.h>
  413. #include <event2/event.h>], [
  414. #ifdef _WIN32
  415. #include <winsock2.h>
  416. #endif
  417. void *event_init(void);],
  418. [
  419. #ifdef _WIN32
  420. {WSADATA d; WSAStartup(0x101,&d); }
  421. #endif
  422. event_init();
  423. ], [--with-libevent-dir], [/opt/libevent])
  424. dnl Now check for particular libevent functions.
  425. save_LIBS="$LIBS"
  426. save_LDFLAGS="$LDFLAGS"
  427. save_CPPFLAGS="$CPPFLAGS"
  428. LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
  429. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  430. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  431. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  432. evutil_secure_rng_add_bytes \
  433. ])
  434. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  435. if test "$enable_static_libevent" = "yes"; then
  436. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  437. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  438. else
  439. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  440. fi
  441. else
  442. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  443. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  444. 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"))
  445. if test "$ac_cv_search_event_new" != "none required"; then
  446. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  447. fi
  448. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  449. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  450. fi
  451. else
  452. TOR_LIBEVENT_LIBS="-levent"
  453. fi
  454. fi
  455. LIBS="$save_LIBS"
  456. LDFLAGS="$save_LDFLAGS"
  457. CPPFLAGS="$save_CPPFLAGS"
  458. dnl Check that libevent is at least at version 2.0.10, the first stable
  459. dnl release of its series
  460. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  461. AC_MSG_CHECKING([whether Libevent is new enough])
  462. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  463. #include <event2/event.h>
  464. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  465. #error
  466. int x = y(zz);
  467. #else
  468. int x = 1;
  469. #endif
  470. ])], [ AC_MSG_RESULT([yes]) ],
  471. [ AC_MSG_RESULT([no])
  472. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  473. LIBS="$save_LIBS"
  474. LDFLAGS="$save_LDFLAGS"
  475. CPPFLAGS="$save_CPPFLAGS"
  476. AC_SUBST(TOR_LIBEVENT_LIBS)
  477. dnl ------------------------------------------------------
  478. dnl Where do you live, libm?
  479. dnl On some platforms (Haiku/BeOS) the math library is
  480. dnl part of libroot. In which case don't link against lm
  481. TOR_LIB_MATH=""
  482. save_LIBS="$LIBS"
  483. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  484. if test "$ac_cv_search_pow" != "none required"; then
  485. TOR_LIB_MATH="$ac_cv_search_pow"
  486. fi
  487. LIBS="$save_LIBS"
  488. AC_SUBST(TOR_LIB_MATH)
  489. dnl ------------------------------------------------------
  490. dnl Where do you live, openssl? And how do we call you?
  491. tor_openssl_pkg_redhat="openssl"
  492. tor_openssl_pkg_debian="libssl-dev"
  493. tor_openssl_devpkg_redhat="openssl-devel"
  494. tor_openssl_devpkg_debian="libssl-dev"
  495. ALT_openssl_WITHVAL=""
  496. AC_ARG_WITH(ssl-dir,
  497. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  498. [
  499. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  500. ALT_openssl_WITHVAL="$withval"
  501. fi
  502. ])
  503. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  504. [#include <openssl/rand.h>],
  505. [void RAND_add(const void *buf, int num, double entropy);],
  506. [RAND_add((void*)0,0,0);], [],
  507. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  508. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  509. if test "$enable_static_openssl" = "yes"; then
  510. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  511. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  512. else
  513. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  514. fi
  515. else
  516. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  517. fi
  518. AC_SUBST(TOR_OPENSSL_LIBS)
  519. dnl Now check for particular openssl functions.
  520. save_LIBS="$LIBS"
  521. save_LDFLAGS="$LDFLAGS"
  522. save_CPPFLAGS="$CPPFLAGS"
  523. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  524. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  525. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  526. AC_TRY_COMPILE([
  527. #include <openssl/opensslv.h>
  528. #if OPENSSL_VERSION_NUMBER < 0x1000000fL
  529. #error "too old"
  530. #endif
  531. ], [],
  532. [ : ],
  533. [ AC_ERROR([OpenSSL is too old. We require 1.0.0 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  534. AC_TRY_COMPILE([
  535. #include <openssl/opensslv.h>
  536. #include <openssl/evp.h>
  537. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  538. #error "no ECC"
  539. #endif
  540. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  541. #error "curves unavailable"
  542. #endif
  543. ], [],
  544. [ : ],
  545. [ AC_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  546. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  547. [#include <openssl/ssl.h>
  548. ])
  549. AC_CHECK_FUNCS([ \
  550. SSL_SESSION_get_master_key \
  551. SSL_get_server_random \
  552. SSL_get_client_ciphers \
  553. SSL_get_client_random \
  554. SSL_CIPHER_find \
  555. TLS_method
  556. ])
  557. dnl Check if OpenSSL has scrypt implementation.
  558. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  559. LIBS="$save_LIBS"
  560. LDFLAGS="$save_LDFLAGS"
  561. CPPFLAGS="$save_CPPFLAGS"
  562. dnl ------------------------------------------------------
  563. dnl Where do you live, zlib? And how do we call you?
  564. tor_zlib_pkg_redhat="zlib"
  565. tor_zlib_pkg_debian="zlib1g"
  566. tor_zlib_devpkg_redhat="zlib-devel"
  567. tor_zlib_devpkg_debian="zlib1g-dev"
  568. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  569. [#include <zlib.h>],
  570. [const char * zlibVersion(void);],
  571. [zlibVersion();], [--with-zlib-dir],
  572. [/opt/zlib])
  573. if test "$enable_static_zlib" = "yes"; then
  574. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  575. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  576. using --enable-static-zlib")
  577. else
  578. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  579. fi
  580. else
  581. TOR_ZLIB_LIBS="-lz"
  582. fi
  583. AC_SUBST(TOR_ZLIB_LIBS)
  584. dnl ----------------------------------------------------------------------
  585. dnl Check if libcap is available for capabilities.
  586. tor_cap_pkg_debian="libcap2"
  587. tor_cap_pkg_redhat="libcap"
  588. tor_cap_devpkg_debian="libcap-dev"
  589. tor_cap_devpkg_redhat="libcap-devel"
  590. AC_CHECK_LIB([cap], [cap_init], [],
  591. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  592. )
  593. AC_CHECK_FUNCS(cap_set_proc)
  594. dnl ---------------------------------------------------------------------
  595. dnl Now that we know about our major libraries, we can check for compiler
  596. dnl and linker hardening options. We need to do this with the libraries known,
  597. dnl since sometimes the linker will like an option but not be willing to
  598. dnl use it with a build of a library.
  599. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  600. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  601. CFLAGS_FTRAPV=
  602. CFLAGS_FWRAPV=
  603. CFLAGS_ASAN=
  604. CFLAGS_UBSAN=
  605. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  606. #if !defined(__clang__)
  607. #error
  608. #endif])], have_clang=yes, have_clang=no)
  609. if test "x$enable_gcc_hardening" != "xno"; then
  610. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  611. if test "x$have_clang" = "xyes"; then
  612. TOR_CHECK_CFLAGS(-Qunused-arguments)
  613. fi
  614. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  615. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  616. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  617. m4_ifdef([AS_VAR_IF],[
  618. AS_VAR_IF(can_compile, [yes],
  619. AS_VAR_IF(can_link, [yes],
  620. [],
  621. 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.)]))
  622. )])
  623. AS_VAR_POPDEF([can_link])
  624. AS_VAR_POPDEF([can_compile])
  625. TOR_CHECK_CFLAGS(-Wstack-protector)
  626. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  627. if test "$bwin32" = "false"; then
  628. TOR_CHECK_CFLAGS(-fPIE)
  629. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  630. fi
  631. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  632. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  633. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  634. AC_MSG_WARN([The compiler supports -ftrapv, but for some reason I was not able to link with -ftrapv. Are you missing run-time support? Run-time hardening will not work as well as it should.])
  635. fi
  636. fi
  637. if test "x$enable_expensive_hardening" = "xyes"; then
  638. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  639. AC_MSG_ERROR([You requested expensive hardening, but the compiler does not seem to support -ftrapv.])
  640. fi
  641. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  642. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  643. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  644. fi
  645. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  646. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  647. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  648. fi
  649. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  650. fi
  651. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  652. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  653. mulodi_fixes_ftrapv=no
  654. if test "$have_clang" = "yes"; then
  655. saved_CFLAGS="$CFLAGS"
  656. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  657. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  658. AC_LINK_IFELSE([
  659. AC_LANG_SOURCE([[
  660. #include <stdint.h>
  661. #include <stdlib.h>
  662. int main(int argc, char **argv)
  663. {
  664. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  665. * (int64_t)atoi(argv[3]);
  666. return x == 9;
  667. } ]])],
  668. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  669. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  670. if test "$ftrapv_can_link" = "no"; then
  671. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  672. AC_LINK_IFELSE([
  673. AC_LANG_SOURCE([[
  674. #include <stdint.h>
  675. #include <stdlib.h>
  676. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  677. *overflow=0;
  678. return a;
  679. }
  680. int main(int argc, char **argv)
  681. {
  682. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  683. * (int64_t)atoi(argv[3]);
  684. return x == 9;
  685. } ]])],
  686. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  687. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  688. fi
  689. CFLAGS="$saved_CFLAGS"
  690. fi
  691. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  692. dnl These cflags add bunches of branches, and we haven't been able to
  693. dnl persuade ourselves that they're suitable for code that needs to be
  694. dnl constant time.
  695. AC_SUBST(CFLAGS_BUGTRAP)
  696. dnl These cflags are variant ones sutable for code that needs to be
  697. dnl constant-time.
  698. AC_SUBST(CFLAGS_CONSTTIME)
  699. if test "x$enable_linker_hardening" != "xno"; then
  700. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  701. fi
  702. # For backtrace support
  703. TOR_CHECK_LDFLAGS(-rdynamic)
  704. dnl ------------------------------------------------------
  705. dnl Now see if we have a -fomit-frame-pointer compiler option.
  706. saved_CFLAGS="$CFLAGS"
  707. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  708. F_OMIT_FRAME_POINTER=''
  709. if test "$saved_CFLAGS" != "$CFLAGS"; then
  710. if test "x$enable_expensive_hardening" != "xyes"; then
  711. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  712. fi
  713. fi
  714. CFLAGS="$saved_CFLAGS"
  715. AC_SUBST(F_OMIT_FRAME_POINTER)
  716. dnl ------------------------------------------------------
  717. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  718. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  719. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  720. dnl code will work.
  721. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  722. dnl ============================================================
  723. dnl Check for libseccomp
  724. if test "x$enable_seccomp" != "xno"; then
  725. AC_CHECK_HEADERS([seccomp.h])
  726. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  727. fi
  728. dnl ============================================================
  729. dnl Check for libscrypt
  730. if test "x$enable_libscrypt" != "xno"; then
  731. AC_CHECK_HEADERS([libscrypt.h])
  732. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  733. AC_CHECK_FUNCS([libscrypt_scrypt])
  734. fi
  735. dnl ============================================================
  736. dnl We need an implementation of curve25519.
  737. dnl set these defaults.
  738. build_curve25519_donna=no
  739. build_curve25519_donna_c64=no
  740. use_curve25519_donna=no
  741. use_curve25519_nacl=no
  742. CURVE25519_LIBS=
  743. dnl The best choice is using curve25519-donna-c64, but that requires
  744. dnl that we
  745. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  746. tor_cv_can_use_curve25519_donna_c64,
  747. [AC_RUN_IFELSE(
  748. [AC_LANG_PROGRAM([dnl
  749. #include <stdint.h>
  750. typedef unsigned uint128_t __attribute__((mode(TI)));
  751. int func(uint64_t a, uint64_t b) {
  752. uint128_t c = ((uint128_t)a) * b;
  753. int ok = ((uint64_t)(c>>96)) == 522859 &&
  754. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  755. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  756. (((uint64_t)(c))&0xffffffffL) == 0;
  757. return ok;
  758. }
  759. ], [dnl
  760. int ok = func( ((uint64_t)2000000000) * 1000000000,
  761. ((uint64_t)1234567890) << 24);
  762. return !ok;
  763. ])],
  764. [tor_cv_can_use_curve25519_donna_c64=yes],
  765. [tor_cv_can_use_curve25519_donna_c64=no],
  766. [AC_LINK_IFELSE(
  767. [AC_LANG_PROGRAM([dnl
  768. #include <stdint.h>
  769. typedef unsigned uint128_t __attribute__((mode(TI)));
  770. int func(uint64_t a, uint64_t b) {
  771. uint128_t c = ((uint128_t)a) * b;
  772. int ok = ((uint64_t)(c>>96)) == 522859 &&
  773. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  774. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  775. (((uint64_t)(c))&0xffffffffL) == 0;
  776. return ok;
  777. }
  778. ], [dnl
  779. int ok = func( ((uint64_t)2000000000) * 1000000000,
  780. ((uint64_t)1234567890) << 24);
  781. return !ok;
  782. ])],
  783. [tor_cv_can_use_curve25519_donna_c64=cross],
  784. [tor_cv_can_use_curve25519_donna_c64=no])])])
  785. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  786. nacl/crypto_scalarmult_curve25519.h])
  787. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  788. tor_cv_can_use_curve25519_nacl,
  789. [tor_saved_LIBS="$LIBS"
  790. LIBS="$LIBS -lnacl"
  791. AC_LINK_IFELSE(
  792. [AC_LANG_PROGRAM([dnl
  793. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  794. #include <crypto_scalarmult_curve25519.h>
  795. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  796. #include <nacl/crypto_scalarmult_curve25519.h>
  797. #endif
  798. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  799. #error Hey, this is the reference implementation! That's not fast.
  800. #endif
  801. ], [
  802. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  803. ])], [tor_cv_can_use_curve25519_nacl=yes],
  804. [tor_cv_can_use_curve25519_nacl=no])
  805. LIBS="$tor_saved_LIBS" ])
  806. dnl Okay, now we need to figure out which one to actually use. Fall back
  807. dnl to curve25519-donna.c
  808. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  809. build_curve25519_donna_c64=yes
  810. use_curve25519_donna=yes
  811. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  812. use_curve25519_nacl=yes
  813. CURVE25519_LIBS=-lnacl
  814. else
  815. build_curve25519_donna=yes
  816. use_curve25519_donna=yes
  817. fi
  818. if test "x$use_curve25519_donna" = "xyes"; then
  819. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  820. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  821. fi
  822. if test "x$use_curve25519_nacl" = "xyes"; then
  823. AC_DEFINE(USE_CURVE25519_NACL, 1,
  824. [Defined if we should use a curve25519 from nacl])
  825. fi
  826. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  827. test "x$build_curve25519_donna" = "xyes")
  828. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  829. test "x$build_curve25519_donna_c64" = "xyes")
  830. AC_SUBST(CURVE25519_LIBS)
  831. dnl Make sure to enable support for large off_t if available.
  832. AC_SYS_LARGEFILE
  833. AC_CHECK_HEADERS([assert.h \
  834. errno.h \
  835. fcntl.h \
  836. signal.h \
  837. string.h \
  838. sys/capability.h \
  839. sys/fcntl.h \
  840. sys/stat.h \
  841. sys/time.h \
  842. sys/types.h \
  843. time.h \
  844. unistd.h \
  845. arpa/inet.h \
  846. crt_externs.h \
  847. execinfo.h \
  848. grp.h \
  849. ifaddrs.h \
  850. inttypes.h \
  851. limits.h \
  852. linux/types.h \
  853. machine/limits.h \
  854. malloc.h \
  855. malloc/malloc.h \
  856. malloc_np.h \
  857. netdb.h \
  858. netinet/in.h \
  859. netinet/in6.h \
  860. pwd.h \
  861. readpassphrase.h \
  862. stdint.h \
  863. sys/eventfd.h \
  864. sys/file.h \
  865. sys/ioctl.h \
  866. sys/limits.h \
  867. sys/mman.h \
  868. sys/param.h \
  869. sys/prctl.h \
  870. sys/resource.h \
  871. sys/select.h \
  872. sys/socket.h \
  873. sys/statvfs.h \
  874. sys/syscall.h \
  875. sys/sysctl.h \
  876. sys/syslimits.h \
  877. sys/time.h \
  878. sys/types.h \
  879. sys/un.h \
  880. sys/utime.h \
  881. sys/wait.h \
  882. syslog.h \
  883. utime.h])
  884. AC_CHECK_HEADERS(sys/param.h)
  885. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  886. [#ifdef HAVE_SYS_TYPES_H
  887. #include <sys/types.h>
  888. #endif
  889. #ifdef HAVE_SYS_SOCKET_H
  890. #include <sys/socket.h>
  891. #endif])
  892. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  893. [#ifdef HAVE_SYS_TYPES_H
  894. #include <sys/types.h>
  895. #endif
  896. #ifdef HAVE_SYS_SOCKET_H
  897. #include <sys/socket.h>
  898. #endif
  899. #ifdef HAVE_NET_IF_H
  900. #include <net/if.h>
  901. #endif
  902. #ifdef HAVE_NETINET_IN_H
  903. #include <netinet/in.h>
  904. #endif])
  905. AC_CHECK_HEADERS(linux/if.h,[],[],
  906. [
  907. #ifdef HAVE_SYS_SOCKET_H
  908. #include <sys/socket.h>
  909. #endif
  910. ])
  911. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  912. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  913. [#ifdef HAVE_SYS_TYPES_H
  914. #include <sys/types.h>
  915. #endif
  916. #ifdef HAVE_SYS_SOCKET_H
  917. #include <sys/socket.h>
  918. #endif
  919. #ifdef HAVE_LIMITS_H
  920. #include <limits.h>
  921. #endif
  922. #ifdef HAVE_LINUX_TYPES_H
  923. #include <linux/types.h>
  924. #endif
  925. #ifdef HAVE_NETINET_IN6_H
  926. #include <netinet/in6.h>
  927. #endif
  928. #ifdef HAVE_NETINET_IN_H
  929. #include <netinet/in.h>
  930. #endif])
  931. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  932. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  933. [#ifdef HAVE_SYS_TYPES_H
  934. #include <sys/types.h>
  935. #endif
  936. #ifdef HAVE_SYS_SOCKET_H
  937. #include <sys/socket.h>
  938. #endif
  939. #ifdef HAVE_LIMITS_H
  940. #include <limits.h>
  941. #endif
  942. #ifdef HAVE_LINUX_TYPES_H
  943. #include <linux/types.h>
  944. #endif
  945. #ifdef HAVE_NETINET_IN6_H
  946. #include <netinet/in6.h>
  947. #endif
  948. #ifdef HAVE_NETINET_IN_H
  949. #include <netinet/in.h>
  950. #endif
  951. #ifdef HAVE_LINUX_IF_H
  952. #include <linux/if.h>
  953. #endif])
  954. transparent_ok=0
  955. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  956. transparent_ok=1
  957. fi
  958. if test "x$linux_netfilter_ipv4" = "x1"; then
  959. transparent_ok=1
  960. fi
  961. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  962. transparent_ok=1
  963. fi
  964. if test "x$transparent_ok" = "x1"; then
  965. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  966. case "$host" in
  967. *-*-openbsd* | *-*-bitrig*)
  968. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  969. esac
  970. else
  971. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  972. fi
  973. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  974. [#ifdef HAVE_SYS_TYPES_H
  975. #include <sys/types.h>
  976. #endif
  977. #ifdef HAVE_SYS_TIME_H
  978. #include <sys/time.h>
  979. #endif])
  980. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  981. dnl Watch out.
  982. AC_CHECK_SIZEOF(int8_t)
  983. AC_CHECK_SIZEOF(int16_t)
  984. AC_CHECK_SIZEOF(int32_t)
  985. AC_CHECK_SIZEOF(int64_t)
  986. AC_CHECK_SIZEOF(uint8_t)
  987. AC_CHECK_SIZEOF(uint16_t)
  988. AC_CHECK_SIZEOF(uint32_t)
  989. AC_CHECK_SIZEOF(uint64_t)
  990. AC_CHECK_SIZEOF(intptr_t)
  991. AC_CHECK_SIZEOF(uintptr_t)
  992. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  993. AC_CHECK_SIZEOF(char)
  994. AC_CHECK_SIZEOF(short)
  995. AC_CHECK_SIZEOF(int)
  996. AC_CHECK_SIZEOF(long)
  997. AC_CHECK_SIZEOF(long long)
  998. AC_CHECK_SIZEOF(__int64)
  999. AC_CHECK_SIZEOF(void *)
  1000. AC_CHECK_SIZEOF(time_t)
  1001. AC_CHECK_SIZEOF(size_t)
  1002. AC_CHECK_SIZEOF(pid_t)
  1003. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1004. AC_PC_FROM_UCONTEXT([:])
  1005. dnl used to include sockaddr_storage, but everybody has that.
  1006. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1007. [#ifdef HAVE_SYS_TYPES_H
  1008. #include <sys/types.h>
  1009. #endif
  1010. #ifdef HAVE_NETINET_IN_H
  1011. #include <netinet/in.h>
  1012. #endif
  1013. #ifdef HAVE_NETINET_IN6_H
  1014. #include <netinet/in6.h>
  1015. #endif
  1016. #ifdef HAVE_SYS_SOCKET_H
  1017. #include <sys/socket.h>
  1018. #endif
  1019. #ifdef _WIN32
  1020. #define _WIN32_WINNT 0x0501
  1021. #define WIN32_LEAN_AND_MEAN
  1022. #include <winsock2.h>
  1023. #include <ws2tcpip.h>
  1024. #endif
  1025. ])
  1026. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1027. [#ifdef HAVE_SYS_TYPES_H
  1028. #include <sys/types.h>
  1029. #endif
  1030. #ifdef HAVE_NETINET_IN_H
  1031. #include <netinet/in.h>
  1032. #endif
  1033. #ifdef HAVE_NETINET_IN6_H
  1034. #include <netinet/in6.h>
  1035. #endif
  1036. #ifdef HAVE_SYS_SOCKET_H
  1037. #include <sys/socket.h>
  1038. #endif
  1039. #ifdef _WIN32
  1040. #define _WIN32_WINNT 0x0501
  1041. #define WIN32_LEAN_AND_MEAN
  1042. #include <winsock2.h>
  1043. #include <ws2tcpip.h>
  1044. #endif
  1045. ])
  1046. AC_CHECK_TYPES([rlim_t], , ,
  1047. [#ifdef HAVE_SYS_TYPES_H
  1048. #include <sys/types.h>
  1049. #endif
  1050. #ifdef HAVE_SYS_TIME_H
  1051. #include <sys/time.h>
  1052. #endif
  1053. #ifdef HAVE_SYS_RESOURCE_H
  1054. #include <sys/resource.h>
  1055. #endif
  1056. ])
  1057. AX_CHECK_SIGN([time_t],
  1058. [ : ],
  1059. [ : ], [
  1060. #ifdef HAVE_SYS_TYPES_H
  1061. #include <sys/types.h>
  1062. #endif
  1063. #ifdef HAVE_SYS_TIME_H
  1064. #include <sys/time.h>
  1065. #endif
  1066. #ifdef HAVE_TIME_H
  1067. #include <time.h>
  1068. #endif
  1069. ])
  1070. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1071. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1072. fi
  1073. AX_CHECK_SIGN([size_t],
  1074. [ tor_cv_size_t_signed=yes ],
  1075. [ tor_cv_size_t_signed=no ], [
  1076. #ifdef HAVE_SYS_TYPES_H
  1077. #include <sys/types.h>
  1078. #endif
  1079. ])
  1080. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1081. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1082. fi
  1083. AX_CHECK_SIGN([enum always],
  1084. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1085. [ : ], [
  1086. enum always { AAA, BBB, CCC };
  1087. ])
  1088. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1089. #ifdef HAVE_SYS_SOCKET_H
  1090. #include <sys/socket.h>
  1091. #endif
  1092. ])
  1093. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1094. AC_CHECK_SIZEOF(cell_t)
  1095. # Now make sure that NULL can be represented as zero bytes.
  1096. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1097. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1098. [[#include <stdlib.h>
  1099. #include <string.h>
  1100. #include <stdio.h>
  1101. #ifdef HAVE_STDDEF_H
  1102. #include <stddef.h>
  1103. #endif
  1104. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1105. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1106. [tor_cv_null_is_zero=yes],
  1107. [tor_cv_null_is_zero=no],
  1108. [tor_cv_null_is_zero=cross])])
  1109. if test "$tor_cv_null_is_zero" = "cross"; then
  1110. # Cross-compiling; let's hope that the target isn't raving mad.
  1111. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1112. fi
  1113. if test "$tor_cv_null_is_zero" != "no"; then
  1114. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1115. [Define to 1 iff memset(0) sets pointers to NULL])
  1116. fi
  1117. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1118. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1119. [[#include <stdlib.h>
  1120. #include <string.h>
  1121. #include <stdio.h>
  1122. #ifdef HAVE_STDDEF_H
  1123. #include <stddef.h>
  1124. #endif
  1125. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1126. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1127. [tor_cv_dbl0_is_zero=yes],
  1128. [tor_cv_dbl0_is_zero=no],
  1129. [tor_cv_dbl0_is_zero=cross])])
  1130. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1131. # Cross-compiling; let's hope that the target isn't raving mad.
  1132. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1133. fi
  1134. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1135. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1136. [Define to 1 iff memset(0) sets doubles to 0.0])
  1137. fi
  1138. # And what happens when we malloc zero?
  1139. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1140. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1141. [[#include <stdlib.h>
  1142. #include <string.h>
  1143. #include <stdio.h>
  1144. #ifdef HAVE_STDDEF_H
  1145. #include <stddef.h>
  1146. #endif
  1147. int main () { return malloc(0)?0:1; }]])],
  1148. [tor_cv_malloc_zero_works=yes],
  1149. [tor_cv_malloc_zero_works=no],
  1150. [tor_cv_malloc_zero_works=cross])])
  1151. if test "$tor_cv_malloc_zero_works" = "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 we need to check malloc() arguments for 0.])
  1154. fi
  1155. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1156. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1157. [Define to 1 iff malloc(0) returns a pointer])
  1158. fi
  1159. # whether we seem to be in a 2s-complement world.
  1160. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1161. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1162. [[int main () { int problem = ((-99) != (~99)+1);
  1163. return problem ? 1 : 0; }]])],
  1164. [tor_cv_twos_complement=yes],
  1165. [tor_cv_twos_complement=no],
  1166. [tor_cv_twos_complement=cross])])
  1167. if test "$tor_cv_twos_complement" = "cross"; then
  1168. # Cross-compiling; let's hope that the target isn't raving mad.
  1169. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1170. fi
  1171. if test "$tor_cv_twos_complement" != "no"; then
  1172. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1173. [Define to 1 iff we represent negative integers with
  1174. two's complement])
  1175. fi
  1176. # What does shifting a negative value do?
  1177. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1178. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1179. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1180. [tor_cv_sign_extend=yes],
  1181. [tor_cv_sign_extend=no],
  1182. [tor_cv_sign_extend=cross])])
  1183. if test "$tor_cv_sign_extend" = "cross"; then
  1184. # Cross-compiling; let's hope that the target isn't raving mad.
  1185. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1186. fi
  1187. if test "$tor_cv_sign_extend" != "no"; then
  1188. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1189. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1190. fi
  1191. # Whether we should use the dmalloc memory allocation debugging library.
  1192. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1193. AC_ARG_WITH(dmalloc,
  1194. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1195. [if [[ "$withval" = "yes" ]]; then
  1196. dmalloc=1
  1197. AC_MSG_RESULT(yes)
  1198. else
  1199. dmalloc=1
  1200. AC_MSG_RESULT(no)
  1201. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1202. )
  1203. if [[ $dmalloc -eq 1 ]]; then
  1204. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1205. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1206. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1207. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1208. fi
  1209. AC_ARG_WITH(tcmalloc,
  1210. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1211. [ tcmalloc=yes ], [ tcmalloc=no ])
  1212. if test "x$tcmalloc" = "xyes"; then
  1213. LDFLAGS="-ltcmalloc $LDFLAGS"
  1214. fi
  1215. using_custom_malloc=no
  1216. if test "x$enable_openbsd_malloc" = "xyes"; then
  1217. using_custom_malloc=yes
  1218. fi
  1219. if test "x$tcmalloc" = "xyes"; then
  1220. using_custom_malloc=yes
  1221. fi
  1222. if test "$using_custom_malloc" = "no"; then
  1223. AC_CHECK_FUNCS(mallinfo)
  1224. fi
  1225. # By default, we're going to assume we don't have mlockall()
  1226. # bionic and other platforms have various broken mlockall subsystems.
  1227. # Some systems don't have a working mlockall, some aren't linkable,
  1228. # and some have it but don't declare it.
  1229. AC_CHECK_FUNCS(mlockall)
  1230. AC_CHECK_DECLS([mlockall], , , [
  1231. #ifdef HAVE_SYS_MMAN_H
  1232. #include <sys/mman.h>
  1233. #endif])
  1234. # Allow user to specify an alternate syslog facility
  1235. AC_ARG_WITH(syslog-facility,
  1236. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1237. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1238. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1239. AC_SUBST(LOGFACILITY)
  1240. # Check if we have getresuid and getresgid
  1241. AC_CHECK_FUNCS(getresuid getresgid)
  1242. # Check for gethostbyname_r in all its glorious incompatible versions.
  1243. # (This logic is based on that in Python's configure.in)
  1244. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1245. [Define this if you have any gethostbyname_r()])
  1246. AC_CHECK_FUNC(gethostbyname_r, [
  1247. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1248. OLD_CFLAGS=$CFLAGS
  1249. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1250. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1251. #include <netdb.h>
  1252. ], [[
  1253. char *cp1, *cp2;
  1254. struct hostent *h1, *h2;
  1255. int i1, i2;
  1256. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1257. ]])],[
  1258. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1259. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1260. [Define this if gethostbyname_r takes 6 arguments])
  1261. AC_MSG_RESULT(6)
  1262. ], [
  1263. AC_TRY_COMPILE([
  1264. #include <netdb.h>
  1265. ], [
  1266. char *cp1, *cp2;
  1267. struct hostent *h1;
  1268. int i1, i2;
  1269. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1270. ], [
  1271. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1272. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1273. [Define this if gethostbyname_r takes 5 arguments])
  1274. AC_MSG_RESULT(5)
  1275. ], [
  1276. AC_TRY_COMPILE([
  1277. #include <netdb.h>
  1278. ], [
  1279. char *cp1;
  1280. struct hostent *h1;
  1281. struct hostent_data hd;
  1282. (void) gethostbyname_r(cp1,h1,&hd);
  1283. ], [
  1284. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1285. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1286. [Define this if gethostbyname_r takes 3 arguments])
  1287. AC_MSG_RESULT(3)
  1288. ], [
  1289. AC_MSG_RESULT(0)
  1290. ])
  1291. ])
  1292. ])
  1293. CFLAGS=$OLD_CFLAGS
  1294. ])
  1295. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1296. tor_cv_have_func_macro,
  1297. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1298. #include <stdio.h>
  1299. int main(int c, char **v) { puts(__func__); }])],
  1300. tor_cv_have_func_macro=yes,
  1301. tor_cv_have_func_macro=no))
  1302. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1303. tor_cv_have_FUNC_macro,
  1304. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1305. #include <stdio.h>
  1306. int main(int c, char **v) { puts(__FUNC__); }])],
  1307. tor_cv_have_FUNC_macro=yes,
  1308. tor_cv_have_FUNC_macro=no))
  1309. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1310. tor_cv_have_FUNCTION_macro,
  1311. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1312. #include <stdio.h>
  1313. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1314. tor_cv_have_FUNCTION_macro=yes,
  1315. tor_cv_have_FUNCTION_macro=no))
  1316. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1317. tor_cv_have_environ_declared,
  1318. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1319. #ifdef HAVE_UNISTD_H
  1320. #include <unistd.h>
  1321. #endif
  1322. #include <stdlib.h>
  1323. int main(int c, char **v) { char **t = environ; }])],
  1324. tor_cv_have_environ_declared=yes,
  1325. tor_cv_have_environ_declared=no))
  1326. if test "$tor_cv_have_func_macro" = "yes"; then
  1327. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1328. fi
  1329. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1330. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1331. fi
  1332. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1333. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1334. [Defined if the compiler supports __FUNCTION__])
  1335. fi
  1336. if test "$tor_cv_have_environ_declared" = "yes"; then
  1337. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1338. [Defined if we have extern char **environ already declared])
  1339. fi
  1340. # $prefix stores the value of the --prefix command line option, or
  1341. # NONE if the option wasn't set. In the case that it wasn't set, make
  1342. # it be the default, so that we can use it to expand directories now.
  1343. if test "x$prefix" = "xNONE"; then
  1344. prefix=$ac_default_prefix
  1345. fi
  1346. # and similarly for $exec_prefix
  1347. if test "x$exec_prefix" = "xNONE"; then
  1348. exec_prefix=$prefix
  1349. fi
  1350. if test "x$BUILDDIR" = "x"; then
  1351. BUILDDIR=`pwd`
  1352. fi
  1353. AC_SUBST(BUILDDIR)
  1354. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1355. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1356. if test "x$CONFDIR" = "x"; then
  1357. CONFDIR=`eval echo $sysconfdir/tor`
  1358. fi
  1359. AC_SUBST(CONFDIR)
  1360. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1361. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1362. BINDIR=`eval echo $bindir`
  1363. AC_SUBST(BINDIR)
  1364. LOCALSTATEDIR=`eval echo $localstatedir`
  1365. AC_SUBST(LOCALSTATEDIR)
  1366. if test "$bwin32" = "true"; then
  1367. # Test if the linker supports the --nxcompat and --dynamicbase options
  1368. # for Windows
  1369. save_LDFLAGS="$LDFLAGS"
  1370. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1371. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1372. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1373. [AC_MSG_RESULT([yes])]
  1374. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1375. [AC_MSG_RESULT([no])]
  1376. )
  1377. LDFLAGS="$save_LDFLAGS"
  1378. fi
  1379. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1380. # than autoconf's macros like.
  1381. if test "$GCC" = "yes"; then
  1382. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1383. # accident waiting to happen.
  1384. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1385. else
  1386. # Override optimization level for non-gcc compilers
  1387. CFLAGS="$CFLAGS -O"
  1388. enable_gcc_warnings=no
  1389. enable_gcc_warnings_advisory=no
  1390. fi
  1391. # Warnings implies advisory-warnings and -Werror.
  1392. if test "$enable_gcc_warnings" = "yes"; then
  1393. enable_gcc_warnings_advisory=yes
  1394. enable_fatal_warnings=yes
  1395. fi
  1396. # OS X Lion started deprecating the system openssl. Let's just disable
  1397. # all deprecation warnings on OS X. Also, to potentially make the binary
  1398. # a little smaller, let's enable dead_strip.
  1399. case "$host_os" in
  1400. darwin*)
  1401. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1402. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1403. esac
  1404. # Add some more warnings which we use in development but not in the
  1405. # released versions. (Some relevant gcc versions can't handle these.)
  1406. #
  1407. # Note that we have to do this near the end of the autoconf process, or
  1408. # else we may run into problems when these warnings hit on the testing C
  1409. # programs that autoconf wants to build.
  1410. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1411. case "$host" in
  1412. *-*-openbsd* | *-*-bitrig*)
  1413. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1414. # That's fine, except that the headers don't pass -Wredundant-decls.
  1415. # Therefore, let's disable -Wsystem-headers when we're building
  1416. # with maximal warnings on OpenBSD.
  1417. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1418. esac
  1419. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1420. # have it work better.
  1421. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1422. # This warning was added in gcc 4.3, but it appears to generate
  1423. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1424. #CFLAGS="$CFLAGS -Wlogical-op"
  1425. m4_foreach_w([warning_flag], [
  1426. -Waddress
  1427. -Waddress-of-array-temporary
  1428. -Waddress-of-temporary
  1429. -Wambiguous-macro
  1430. -Wanonymous-pack-parens
  1431. -Warc
  1432. -Warc-abi
  1433. -Warc-bridge-casts-disallowed-in-nonarc
  1434. -Warc-maybe-repeated-use-of-weak
  1435. -Warc-performSelector-leaks
  1436. -Warc-repeated-use-of-weak
  1437. -Warray-bounds
  1438. -Warray-bounds-pointer-arithmetic
  1439. -Wasm
  1440. -Wasm-operand-widths
  1441. -Watomic-properties
  1442. -Watomic-property-with-user-defined-accessor
  1443. -Wauto-import
  1444. -Wauto-storage-class
  1445. -Wauto-var-id
  1446. -Wavailability
  1447. -Wbackslash-newline-escape
  1448. -Wbad-array-new-length
  1449. -Wbind-to-temporary-copy
  1450. -Wbitfield-constant-conversion
  1451. -Wbool-conversion
  1452. -Wbool-conversions
  1453. -Wbuiltin-requires-header
  1454. -Wchar-align
  1455. -Wcompare-distinct-pointer-types
  1456. -Wcomplex-component-init
  1457. -Wconditional-type-mismatch
  1458. -Wconfig-macros
  1459. -Wconstant-conversion
  1460. -Wconstant-logical-operand
  1461. -Wconstexpr-not-const
  1462. -Wcustom-atomic-properties
  1463. -Wdangling-field
  1464. -Wdangling-initializer-list
  1465. -Wdate-time
  1466. -Wdelegating-ctor-cycles
  1467. -Wdeprecated-implementations
  1468. -Wdeprecated-register
  1469. -Wdirect-ivar-access
  1470. -Wdiscard-qual
  1471. -Wdistributed-object-modifiers
  1472. -Wdivision-by-zero
  1473. -Wdollar-in-identifier-extension
  1474. -Wdouble-promotion
  1475. -Wduplicate-decl-specifier
  1476. -Wduplicate-enum
  1477. -Wduplicate-method-arg
  1478. -Wduplicate-method-match
  1479. -Wduplicated-cond
  1480. -Wdynamic-class-memaccess
  1481. -Wembedded-directive
  1482. -Wempty-translation-unit
  1483. -Wenum-conversion
  1484. -Wexit-time-destructors
  1485. -Wexplicit-ownership-type
  1486. -Wextern-initializer
  1487. -Wextra
  1488. -Wextra-semi
  1489. -Wextra-tokens
  1490. -Wflexible-array-extensions
  1491. -Wfloat-conversion
  1492. -Wformat-non-iso
  1493. -Wfour-char-constants
  1494. -Wgcc-compat
  1495. -Wglobal-constructors
  1496. -Wgnu-array-member-paren-init
  1497. -Wgnu-designator
  1498. -Wgnu-static-float-init
  1499. -Wheader-guard
  1500. -Wheader-hygiene
  1501. -Widiomatic-parentheses
  1502. -Wignored-attributes
  1503. -Wimplicit-atomic-properties
  1504. -Wimplicit-conversion-floating-point-to-bool
  1505. -Wimplicit-exception-spec-mismatch
  1506. -Wimplicit-fallthrough
  1507. -Wimplicit-fallthrough-per-function
  1508. -Wimplicit-retain-self
  1509. -Wimport-preprocessor-directive-pedantic
  1510. -Wincompatible-library-redeclaration
  1511. -Wincompatible-pointer-types-discards-qualifiers
  1512. -Wincomplete-implementation
  1513. -Wincomplete-module
  1514. -Wincomplete-umbrella
  1515. -Winit-self
  1516. -Wint-conversions
  1517. -Wint-to-void-pointer-cast
  1518. -Winteger-overflow
  1519. -Winvalid-constexpr
  1520. -Winvalid-iboutlet
  1521. -Winvalid-noreturn
  1522. -Winvalid-pp-token
  1523. -Winvalid-source-encoding
  1524. -Winvalid-token-paste
  1525. -Wknr-promoted-parameter
  1526. -Wlanguage-extension-token
  1527. -Wlarge-by-value-copy
  1528. -Wliteral-conversion
  1529. -Wliteral-range
  1530. -Wlocal-type-template-args
  1531. -Wlogical-op
  1532. -Wloop-analysis
  1533. -Wmain-return-type
  1534. -Wmalformed-warning-check
  1535. -Wmethod-signatures
  1536. -Wmicrosoft
  1537. -Wmicrosoft-exists
  1538. -Wmismatched-parameter-types
  1539. -Wmismatched-return-types
  1540. -Wmissing-field-initializers
  1541. -Wmissing-format-attribute
  1542. -Wmissing-noreturn
  1543. -Wmissing-selector-name
  1544. -Wmissing-sysroot
  1545. -Wmissing-variable-declarations
  1546. -Wmodule-conflict
  1547. -Wnested-anon-types
  1548. -Wnewline-eof
  1549. -Wnon-literal-null-conversion
  1550. -Wnon-pod-varargs
  1551. -Wnonportable-cfstrings
  1552. -Wnormalized=id
  1553. -Wnull-arithmetic
  1554. -Wnull-character
  1555. -Wnull-conversion
  1556. -Wnull-dereference
  1557. -Wout-of-line-declaration
  1558. -Wover-aligned
  1559. -Woverlength-strings
  1560. -Woverride-init
  1561. -Woverriding-method-mismatch
  1562. -Wpointer-type-mismatch
  1563. -Wpredefined-identifier-outside-function
  1564. -Wprotocol-property-synthesis-ambiguity
  1565. -Wreadonly-iboutlet-property
  1566. -Wreadonly-setter-attrs
  1567. -Wreceiver-expr
  1568. -Wreceiver-forward-class
  1569. -Wreceiver-is-weak
  1570. -Wreinterpret-base-class
  1571. -Wrequires-super-attribute
  1572. -Wreserved-user-defined-literal
  1573. -Wreturn-stack-address
  1574. -Wsection
  1575. -Wselector-type-mismatch
  1576. -Wsentinel
  1577. -Wserialized-diagnostics
  1578. -Wshadow
  1579. -Wshift-count-negative
  1580. -Wshift-count-overflow
  1581. -Wshift-negative-value
  1582. -Wshift-overflow=2
  1583. -Wshift-sign-overflow
  1584. -Wshorten-64-to-32
  1585. -Wsizeof-array-argument
  1586. -Wsource-uses-openmp
  1587. -Wstatic-float-init
  1588. -Wstatic-in-inline
  1589. -Wstatic-local-in-inline
  1590. -Wstrict-overflow=2
  1591. -Wstring-compare
  1592. -Wstring-conversion
  1593. -Wstrlcpy-strlcat-size
  1594. -Wstrncat-size
  1595. -Wsuggest-attribute=format
  1596. -Wsuggest-attribute=noreturn
  1597. -Wsuper-class-method-mismatch
  1598. -Wswitch-bool
  1599. -Wsync-nand
  1600. -Wtautological-constant-out-of-range-compare
  1601. -Wtentative-definition-incomplete-type
  1602. -Wthread-safety
  1603. -Wthread-safety-analysis
  1604. -Wthread-safety-attributes
  1605. -Wthread-safety-beta
  1606. -Wthread-safety-precise
  1607. -Wtrampolines
  1608. -Wtype-safety
  1609. -Wtypedef-redefinition
  1610. -Wtypename-missing
  1611. -Wundefined-inline
  1612. -Wundefined-internal
  1613. -Wundefined-reinterpret-cast
  1614. -Wunicode
  1615. -Wunicode-whitespace
  1616. -Wunknown-warning-option
  1617. -Wunnamed-type-template-args
  1618. -Wunneeded-member-function
  1619. -Wunsequenced
  1620. -Wunsupported-visibility
  1621. -Wunused-but-set-parameter
  1622. -Wunused-but-set-variable
  1623. -Wunused-command-line-argument
  1624. -Wunused-const-variable=2
  1625. -Wunused-exception-parameter
  1626. -Wunused-local-typedefs
  1627. -Wunused-member-function
  1628. -Wunused-sanitize-argument
  1629. -Wunused-volatile-lvalue
  1630. -Wuser-defined-literals
  1631. -Wvariadic-macros
  1632. -Wvector-conversion
  1633. -Wvector-conversions
  1634. -Wvexing-parse
  1635. -Wvisibility
  1636. -Wvla-extension
  1637. -Wzero-length-array
  1638. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1639. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1640. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1641. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1642. CFLAGS="$CFLAGS -Wwrite-strings"
  1643. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1644. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1645. CFLAGS="$CFLAGS -Wunused-parameter "
  1646. # These interfere with building main() { return 0; }, which autoconf
  1647. # likes to use as its default program.
  1648. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1649. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1650. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1651. fi
  1652. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1653. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1654. fi
  1655. if test "x$enable_fatal_warnings" = "xyes"; then
  1656. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1657. # default autoconf programs are full of errors.
  1658. CFLAGS="$CFLAGS -Werror"
  1659. fi
  1660. fi
  1661. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1662. case "$host_os" in
  1663. darwin*)
  1664. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1665. esac
  1666. fi
  1667. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1668. AC_CONFIG_FILES([
  1669. Doxyfile
  1670. Makefile
  1671. contrib/dist/suse/tor.sh
  1672. contrib/operator-tools/tor.logrotate
  1673. contrib/dist/tor.sh
  1674. contrib/dist/torctl
  1675. contrib/dist/tor.service
  1676. src/config/torrc.sample
  1677. src/config/torrc.minimal
  1678. scripts/maint/checkOptionDocs.pl
  1679. scripts/maint/updateVersions.pl
  1680. ])
  1681. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1682. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1683. for file in $regular_mans ; do
  1684. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1685. echo "==================================";
  1686. echo;
  1687. echo "Building Tor has failed since manpages cannot be built.";
  1688. echo;
  1689. echo "You need asciidoc installed to be able to build the manpages.";
  1690. echo "To build without manpages, use the --disable-asciidoc argument";
  1691. echo "when calling configure.";
  1692. echo;
  1693. echo "==================================";
  1694. exit 1;
  1695. fi
  1696. done
  1697. fi
  1698. AC_OUTPUT