configure.ac 59 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],[0.2.9.5-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_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 $TOR_LIB_WS32], [
  408. #ifdef _WIN32
  409. #include <winsock2.h>
  410. #endif
  411. #include <sys/time.h>
  412. #include <sys/types.h>
  413. #include <event2/event.h>], [
  414. #ifdef _WIN32
  415. #include <winsock2.h>
  416. #endif
  417. void *event_init(void);],
  418. [
  419. #ifdef _WIN32
  420. {WSADATA d; WSAStartup(0x101,&d); }
  421. #endif
  422. event_init();
  423. ], [--with-libevent-dir], [/opt/libevent])
  424. dnl Determine the incantation needed to link libevent.
  425. save_LIBS="$LIBS"
  426. save_LDFLAGS="$LDFLAGS"
  427. save_CPPFLAGS="$CPPFLAGS"
  428. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  429. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  430. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  431. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  432. if test "$enable_static_libevent" = "yes"; then
  433. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  434. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  435. else
  436. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  437. fi
  438. else
  439. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  440. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  441. 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"))
  442. if test "$ac_cv_search_event_new" != "none required"; then
  443. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  444. fi
  445. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  446. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  447. fi
  448. else
  449. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  450. fi
  451. fi
  452. dnl Now check for particular libevent functions.
  453. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  454. evutil_secure_rng_add_bytes \
  455. ])
  456. LIBS="$save_LIBS"
  457. LDFLAGS="$save_LDFLAGS"
  458. CPPFLAGS="$save_CPPFLAGS"
  459. dnl Check that libevent is at least at version 2.0.10, the first stable
  460. dnl release of its series
  461. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  462. AC_MSG_CHECKING([whether Libevent is new enough])
  463. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  464. #include <event2/event.h>
  465. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  466. #error
  467. int x = y(zz);
  468. #else
  469. int x = 1;
  470. #endif
  471. ])], [ AC_MSG_RESULT([yes]) ],
  472. [ AC_MSG_RESULT([no])
  473. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  474. LIBS="$save_LIBS"
  475. LDFLAGS="$save_LDFLAGS"
  476. CPPFLAGS="$save_CPPFLAGS"
  477. AC_SUBST(TOR_LIBEVENT_LIBS)
  478. dnl ------------------------------------------------------
  479. dnl Where do you live, libm?
  480. dnl On some platforms (Haiku/BeOS) the math library is
  481. dnl part of libroot. In which case don't link against lm
  482. TOR_LIB_MATH=""
  483. save_LIBS="$LIBS"
  484. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  485. if test "$ac_cv_search_pow" != "none required"; then
  486. TOR_LIB_MATH="$ac_cv_search_pow"
  487. fi
  488. LIBS="$save_LIBS"
  489. AC_SUBST(TOR_LIB_MATH)
  490. dnl ------------------------------------------------------
  491. dnl Where do you live, openssl? And how do we call you?
  492. tor_openssl_pkg_redhat="openssl"
  493. tor_openssl_pkg_debian="libssl-dev"
  494. tor_openssl_devpkg_redhat="openssl-devel"
  495. tor_openssl_devpkg_debian="libssl-dev"
  496. ALT_openssl_WITHVAL=""
  497. AC_ARG_WITH(ssl-dir,
  498. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  499. [
  500. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  501. ALT_openssl_WITHVAL="$withval"
  502. fi
  503. ])
  504. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  505. [#include <openssl/rand.h>],
  506. [void RAND_add(const void *buf, int num, double entropy);],
  507. [RAND_add((void*)0,0,0);], [],
  508. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  509. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  510. if test "$enable_static_openssl" = "yes"; then
  511. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  512. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  513. else
  514. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  515. fi
  516. else
  517. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  518. fi
  519. AC_SUBST(TOR_OPENSSL_LIBS)
  520. dnl Now check for particular openssl functions.
  521. save_LIBS="$LIBS"
  522. save_LDFLAGS="$LDFLAGS"
  523. save_CPPFLAGS="$CPPFLAGS"
  524. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  525. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  526. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  527. AC_TRY_COMPILE([
  528. #include <openssl/opensslv.h>
  529. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  530. #error "too old"
  531. #endif
  532. ], [],
  533. [ : ],
  534. [ AC_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  535. AC_TRY_COMPILE([
  536. #include <openssl/opensslv.h>
  537. #include <openssl/evp.h>
  538. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  539. #error "no ECC"
  540. #endif
  541. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  542. #error "curves unavailable"
  543. #endif
  544. ], [],
  545. [ : ],
  546. [ AC_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  547. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  548. [#include <openssl/ssl.h>
  549. ])
  550. AC_CHECK_FUNCS([ \
  551. SSL_SESSION_get_master_key \
  552. SSL_get_server_random \
  553. SSL_get_client_ciphers \
  554. SSL_get_client_random \
  555. SSL_CIPHER_find \
  556. TLS_method
  557. ])
  558. dnl Check if OpenSSL has scrypt implementation.
  559. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  560. LIBS="$save_LIBS"
  561. LDFLAGS="$save_LDFLAGS"
  562. CPPFLAGS="$save_CPPFLAGS"
  563. dnl ------------------------------------------------------
  564. dnl Where do you live, zlib? And how do we call you?
  565. tor_zlib_pkg_redhat="zlib"
  566. tor_zlib_pkg_debian="zlib1g"
  567. tor_zlib_devpkg_redhat="zlib-devel"
  568. tor_zlib_devpkg_debian="zlib1g-dev"
  569. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  570. [#include <zlib.h>],
  571. [const char * zlibVersion(void);],
  572. [zlibVersion();], [--with-zlib-dir],
  573. [/opt/zlib])
  574. if test "$enable_static_zlib" = "yes"; then
  575. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  576. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  577. using --enable-static-zlib")
  578. else
  579. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  580. fi
  581. else
  582. TOR_ZLIB_LIBS="-lz"
  583. fi
  584. AC_SUBST(TOR_ZLIB_LIBS)
  585. dnl ----------------------------------------------------------------------
  586. dnl Check if libcap is available for capabilities.
  587. tor_cap_pkg_debian="libcap2"
  588. tor_cap_pkg_redhat="libcap"
  589. tor_cap_devpkg_debian="libcap-dev"
  590. tor_cap_devpkg_redhat="libcap-devel"
  591. AC_CHECK_LIB([cap], [cap_init], [],
  592. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  593. )
  594. AC_CHECK_FUNCS(cap_set_proc)
  595. dnl ---------------------------------------------------------------------
  596. dnl Now that we know about our major libraries, we can check for compiler
  597. dnl and linker hardening options. We need to do this with the libraries known,
  598. dnl since sometimes the linker will like an option but not be willing to
  599. dnl use it with a build of a library.
  600. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  601. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  602. CFLAGS_FTRAPV=
  603. CFLAGS_FWRAPV=
  604. CFLAGS_ASAN=
  605. CFLAGS_UBSAN=
  606. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  607. #if !defined(__clang__)
  608. #error
  609. #endif])], have_clang=yes, have_clang=no)
  610. if test "x$enable_gcc_hardening" != "xno"; then
  611. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  612. if test "x$have_clang" = "xyes"; then
  613. TOR_CHECK_CFLAGS(-Qunused-arguments)
  614. fi
  615. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  616. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  617. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  618. m4_ifdef([AS_VAR_IF],[
  619. AS_VAR_IF(can_compile, [yes],
  620. AS_VAR_IF(can_link, [yes],
  621. [],
  622. 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.)]))
  623. )])
  624. AS_VAR_POPDEF([can_link])
  625. AS_VAR_POPDEF([can_compile])
  626. TOR_CHECK_CFLAGS(-Wstack-protector)
  627. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  628. if test "$bwin32" = "false"; then
  629. TOR_CHECK_CFLAGS(-fPIE)
  630. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  631. fi
  632. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  633. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  634. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  635. AC_MSG_WARN([The compiler supports -ftrapv, but for some reason I was not able to link with -ftrapv. Are you missing run-time support? Run-time hardening will not work as well as it should.])
  636. fi
  637. fi
  638. if test "x$enable_expensive_hardening" = "xyes"; then
  639. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  640. AC_MSG_ERROR([You requested expensive hardening, but the compiler does not seem to support -ftrapv.])
  641. fi
  642. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  643. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  644. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  645. fi
  646. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  647. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  648. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  649. fi
  650. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  651. fi
  652. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  653. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  654. mulodi_fixes_ftrapv=no
  655. if test "$have_clang" = "yes"; then
  656. saved_CFLAGS="$CFLAGS"
  657. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  658. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  659. AC_LINK_IFELSE([
  660. AC_LANG_SOURCE([[
  661. #include <stdint.h>
  662. #include <stdlib.h>
  663. int main(int argc, char **argv)
  664. {
  665. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  666. * (int64_t)atoi(argv[3]);
  667. return x == 9;
  668. } ]])],
  669. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  670. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  671. if test "$ftrapv_can_link" = "no"; then
  672. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  673. AC_LINK_IFELSE([
  674. AC_LANG_SOURCE([[
  675. #include <stdint.h>
  676. #include <stdlib.h>
  677. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  678. *overflow=0;
  679. return a;
  680. }
  681. int main(int argc, char **argv)
  682. {
  683. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  684. * (int64_t)atoi(argv[3]);
  685. return x == 9;
  686. } ]])],
  687. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  688. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  689. fi
  690. CFLAGS="$saved_CFLAGS"
  691. fi
  692. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  693. dnl These cflags add bunches of branches, and we haven't been able to
  694. dnl persuade ourselves that they're suitable for code that needs to be
  695. dnl constant time.
  696. AC_SUBST(CFLAGS_BUGTRAP)
  697. dnl These cflags are variant ones sutable for code that needs to be
  698. dnl constant-time.
  699. AC_SUBST(CFLAGS_CONSTTIME)
  700. if test "x$enable_linker_hardening" != "xno"; then
  701. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  702. fi
  703. # For backtrace support
  704. TOR_CHECK_LDFLAGS(-rdynamic)
  705. dnl ------------------------------------------------------
  706. dnl Now see if we have a -fomit-frame-pointer compiler option.
  707. saved_CFLAGS="$CFLAGS"
  708. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  709. F_OMIT_FRAME_POINTER=''
  710. if test "$saved_CFLAGS" != "$CFLAGS"; then
  711. if test "x$enable_expensive_hardening" != "xyes"; then
  712. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  713. fi
  714. fi
  715. CFLAGS="$saved_CFLAGS"
  716. AC_SUBST(F_OMIT_FRAME_POINTER)
  717. dnl ------------------------------------------------------
  718. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  719. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  720. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  721. dnl code will work.
  722. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  723. dnl ============================================================
  724. dnl Check for libseccomp
  725. if test "x$enable_seccomp" != "xno"; then
  726. AC_CHECK_HEADERS([seccomp.h])
  727. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  728. fi
  729. dnl ============================================================
  730. dnl Check for libscrypt
  731. if test "x$enable_libscrypt" != "xno"; then
  732. AC_CHECK_HEADERS([libscrypt.h])
  733. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  734. AC_CHECK_FUNCS([libscrypt_scrypt])
  735. fi
  736. dnl ============================================================
  737. dnl We need an implementation of curve25519.
  738. dnl set these defaults.
  739. build_curve25519_donna=no
  740. build_curve25519_donna_c64=no
  741. use_curve25519_donna=no
  742. use_curve25519_nacl=no
  743. CURVE25519_LIBS=
  744. dnl The best choice is using curve25519-donna-c64, but that requires
  745. dnl that we
  746. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  747. tor_cv_can_use_curve25519_donna_c64,
  748. [AC_RUN_IFELSE(
  749. [AC_LANG_PROGRAM([dnl
  750. #include <stdint.h>
  751. typedef unsigned uint128_t __attribute__((mode(TI)));
  752. int func(uint64_t a, uint64_t b) {
  753. uint128_t c = ((uint128_t)a) * b;
  754. int ok = ((uint64_t)(c>>96)) == 522859 &&
  755. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  756. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  757. (((uint64_t)(c))&0xffffffffL) == 0;
  758. return ok;
  759. }
  760. ], [dnl
  761. int ok = func( ((uint64_t)2000000000) * 1000000000,
  762. ((uint64_t)1234567890) << 24);
  763. return !ok;
  764. ])],
  765. [tor_cv_can_use_curve25519_donna_c64=yes],
  766. [tor_cv_can_use_curve25519_donna_c64=no],
  767. [AC_LINK_IFELSE(
  768. [AC_LANG_PROGRAM([dnl
  769. #include <stdint.h>
  770. typedef unsigned uint128_t __attribute__((mode(TI)));
  771. int func(uint64_t a, uint64_t b) {
  772. uint128_t c = ((uint128_t)a) * b;
  773. int ok = ((uint64_t)(c>>96)) == 522859 &&
  774. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  775. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  776. (((uint64_t)(c))&0xffffffffL) == 0;
  777. return ok;
  778. }
  779. ], [dnl
  780. int ok = func( ((uint64_t)2000000000) * 1000000000,
  781. ((uint64_t)1234567890) << 24);
  782. return !ok;
  783. ])],
  784. [tor_cv_can_use_curve25519_donna_c64=cross],
  785. [tor_cv_can_use_curve25519_donna_c64=no])])])
  786. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  787. nacl/crypto_scalarmult_curve25519.h])
  788. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  789. tor_cv_can_use_curve25519_nacl,
  790. [tor_saved_LIBS="$LIBS"
  791. LIBS="$LIBS -lnacl"
  792. AC_LINK_IFELSE(
  793. [AC_LANG_PROGRAM([dnl
  794. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  795. #include <crypto_scalarmult_curve25519.h>
  796. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  797. #include <nacl/crypto_scalarmult_curve25519.h>
  798. #endif
  799. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  800. #error Hey, this is the reference implementation! That's not fast.
  801. #endif
  802. ], [
  803. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  804. ])], [tor_cv_can_use_curve25519_nacl=yes],
  805. [tor_cv_can_use_curve25519_nacl=no])
  806. LIBS="$tor_saved_LIBS" ])
  807. dnl Okay, now we need to figure out which one to actually use. Fall back
  808. dnl to curve25519-donna.c
  809. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  810. build_curve25519_donna_c64=yes
  811. use_curve25519_donna=yes
  812. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  813. use_curve25519_nacl=yes
  814. CURVE25519_LIBS=-lnacl
  815. else
  816. build_curve25519_donna=yes
  817. use_curve25519_donna=yes
  818. fi
  819. if test "x$use_curve25519_donna" = "xyes"; then
  820. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  821. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  822. fi
  823. if test "x$use_curve25519_nacl" = "xyes"; then
  824. AC_DEFINE(USE_CURVE25519_NACL, 1,
  825. [Defined if we should use a curve25519 from nacl])
  826. fi
  827. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  828. test "x$build_curve25519_donna" = "xyes")
  829. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  830. test "x$build_curve25519_donna_c64" = "xyes")
  831. AC_SUBST(CURVE25519_LIBS)
  832. dnl Make sure to enable support for large off_t if available.
  833. AC_SYS_LARGEFILE
  834. AC_CHECK_HEADERS([assert.h \
  835. errno.h \
  836. fcntl.h \
  837. signal.h \
  838. string.h \
  839. sys/capability.h \
  840. sys/fcntl.h \
  841. sys/stat.h \
  842. sys/time.h \
  843. sys/types.h \
  844. time.h \
  845. unistd.h \
  846. arpa/inet.h \
  847. crt_externs.h \
  848. execinfo.h \
  849. grp.h \
  850. ifaddrs.h \
  851. inttypes.h \
  852. limits.h \
  853. linux/types.h \
  854. machine/limits.h \
  855. malloc.h \
  856. malloc/malloc.h \
  857. malloc_np.h \
  858. netdb.h \
  859. netinet/in.h \
  860. netinet/in6.h \
  861. pwd.h \
  862. readpassphrase.h \
  863. stdint.h \
  864. sys/eventfd.h \
  865. sys/file.h \
  866. sys/ioctl.h \
  867. sys/limits.h \
  868. sys/mman.h \
  869. sys/param.h \
  870. sys/prctl.h \
  871. sys/random.h \
  872. sys/resource.h \
  873. sys/select.h \
  874. sys/socket.h \
  875. sys/statvfs.h \
  876. sys/syscall.h \
  877. sys/sysctl.h \
  878. sys/syslimits.h \
  879. sys/time.h \
  880. sys/types.h \
  881. sys/un.h \
  882. sys/utime.h \
  883. sys/wait.h \
  884. syslog.h \
  885. utime.h])
  886. AC_CHECK_HEADERS(sys/param.h)
  887. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  888. [#ifdef HAVE_SYS_TYPES_H
  889. #include <sys/types.h>
  890. #endif
  891. #ifdef HAVE_SYS_SOCKET_H
  892. #include <sys/socket.h>
  893. #endif])
  894. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  895. [#ifdef HAVE_SYS_TYPES_H
  896. #include <sys/types.h>
  897. #endif
  898. #ifdef HAVE_SYS_SOCKET_H
  899. #include <sys/socket.h>
  900. #endif
  901. #ifdef HAVE_NET_IF_H
  902. #include <net/if.h>
  903. #endif
  904. #ifdef HAVE_NETINET_IN_H
  905. #include <netinet/in.h>
  906. #endif])
  907. AC_CHECK_HEADERS(linux/if.h,[],[],
  908. [
  909. #ifdef HAVE_SYS_SOCKET_H
  910. #include <sys/socket.h>
  911. #endif
  912. ])
  913. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  914. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  915. [#ifdef HAVE_SYS_TYPES_H
  916. #include <sys/types.h>
  917. #endif
  918. #ifdef HAVE_SYS_SOCKET_H
  919. #include <sys/socket.h>
  920. #endif
  921. #ifdef HAVE_LIMITS_H
  922. #include <limits.h>
  923. #endif
  924. #ifdef HAVE_LINUX_TYPES_H
  925. #include <linux/types.h>
  926. #endif
  927. #ifdef HAVE_NETINET_IN6_H
  928. #include <netinet/in6.h>
  929. #endif
  930. #ifdef HAVE_NETINET_IN_H
  931. #include <netinet/in.h>
  932. #endif])
  933. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  934. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  935. [#ifdef HAVE_SYS_TYPES_H
  936. #include <sys/types.h>
  937. #endif
  938. #ifdef HAVE_SYS_SOCKET_H
  939. #include <sys/socket.h>
  940. #endif
  941. #ifdef HAVE_LIMITS_H
  942. #include <limits.h>
  943. #endif
  944. #ifdef HAVE_LINUX_TYPES_H
  945. #include <linux/types.h>
  946. #endif
  947. #ifdef HAVE_NETINET_IN6_H
  948. #include <netinet/in6.h>
  949. #endif
  950. #ifdef HAVE_NETINET_IN_H
  951. #include <netinet/in.h>
  952. #endif
  953. #ifdef HAVE_LINUX_IF_H
  954. #include <linux/if.h>
  955. #endif])
  956. transparent_ok=0
  957. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  958. transparent_ok=1
  959. fi
  960. if test "x$linux_netfilter_ipv4" = "x1"; then
  961. transparent_ok=1
  962. fi
  963. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  964. transparent_ok=1
  965. fi
  966. if test "x$transparent_ok" = "x1"; then
  967. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  968. case "$host" in
  969. *-*-openbsd* | *-*-bitrig*)
  970. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  971. esac
  972. else
  973. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  974. fi
  975. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  976. [#ifdef HAVE_SYS_TYPES_H
  977. #include <sys/types.h>
  978. #endif
  979. #ifdef HAVE_SYS_TIME_H
  980. #include <sys/time.h>
  981. #endif])
  982. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  983. dnl Watch out.
  984. AC_CHECK_SIZEOF(int8_t)
  985. AC_CHECK_SIZEOF(int16_t)
  986. AC_CHECK_SIZEOF(int32_t)
  987. AC_CHECK_SIZEOF(int64_t)
  988. AC_CHECK_SIZEOF(uint8_t)
  989. AC_CHECK_SIZEOF(uint16_t)
  990. AC_CHECK_SIZEOF(uint32_t)
  991. AC_CHECK_SIZEOF(uint64_t)
  992. AC_CHECK_SIZEOF(intptr_t)
  993. AC_CHECK_SIZEOF(uintptr_t)
  994. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  995. AC_CHECK_SIZEOF(char)
  996. AC_CHECK_SIZEOF(short)
  997. AC_CHECK_SIZEOF(int)
  998. AC_CHECK_SIZEOF(long)
  999. AC_CHECK_SIZEOF(long long)
  1000. AC_CHECK_SIZEOF(__int64)
  1001. AC_CHECK_SIZEOF(void *)
  1002. AC_CHECK_SIZEOF(time_t)
  1003. AC_CHECK_SIZEOF(size_t)
  1004. AC_CHECK_SIZEOF(pid_t)
  1005. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1006. AC_PC_FROM_UCONTEXT([:])
  1007. dnl used to include sockaddr_storage, but everybody has that.
  1008. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1009. [#ifdef HAVE_SYS_TYPES_H
  1010. #include <sys/types.h>
  1011. #endif
  1012. #ifdef HAVE_NETINET_IN_H
  1013. #include <netinet/in.h>
  1014. #endif
  1015. #ifdef HAVE_NETINET_IN6_H
  1016. #include <netinet/in6.h>
  1017. #endif
  1018. #ifdef HAVE_SYS_SOCKET_H
  1019. #include <sys/socket.h>
  1020. #endif
  1021. #ifdef _WIN32
  1022. #define _WIN32_WINNT 0x0501
  1023. #define WIN32_LEAN_AND_MEAN
  1024. #include <winsock2.h>
  1025. #include <ws2tcpip.h>
  1026. #endif
  1027. ])
  1028. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1029. [#ifdef HAVE_SYS_TYPES_H
  1030. #include <sys/types.h>
  1031. #endif
  1032. #ifdef HAVE_NETINET_IN_H
  1033. #include <netinet/in.h>
  1034. #endif
  1035. #ifdef HAVE_NETINET_IN6_H
  1036. #include <netinet/in6.h>
  1037. #endif
  1038. #ifdef HAVE_SYS_SOCKET_H
  1039. #include <sys/socket.h>
  1040. #endif
  1041. #ifdef _WIN32
  1042. #define _WIN32_WINNT 0x0501
  1043. #define WIN32_LEAN_AND_MEAN
  1044. #include <winsock2.h>
  1045. #include <ws2tcpip.h>
  1046. #endif
  1047. ])
  1048. AC_CHECK_TYPES([rlim_t], , ,
  1049. [#ifdef HAVE_SYS_TYPES_H
  1050. #include <sys/types.h>
  1051. #endif
  1052. #ifdef HAVE_SYS_TIME_H
  1053. #include <sys/time.h>
  1054. #endif
  1055. #ifdef HAVE_SYS_RESOURCE_H
  1056. #include <sys/resource.h>
  1057. #endif
  1058. ])
  1059. AX_CHECK_SIGN([time_t],
  1060. [ : ],
  1061. [ : ], [
  1062. #ifdef HAVE_SYS_TYPES_H
  1063. #include <sys/types.h>
  1064. #endif
  1065. #ifdef HAVE_SYS_TIME_H
  1066. #include <sys/time.h>
  1067. #endif
  1068. #ifdef HAVE_TIME_H
  1069. #include <time.h>
  1070. #endif
  1071. ])
  1072. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1073. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1074. fi
  1075. AX_CHECK_SIGN([size_t],
  1076. [ tor_cv_size_t_signed=yes ],
  1077. [ tor_cv_size_t_signed=no ], [
  1078. #ifdef HAVE_SYS_TYPES_H
  1079. #include <sys/types.h>
  1080. #endif
  1081. ])
  1082. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1083. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1084. fi
  1085. AX_CHECK_SIGN([enum always],
  1086. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1087. [ : ], [
  1088. enum always { AAA, BBB, CCC };
  1089. ])
  1090. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1091. #ifdef HAVE_SYS_SOCKET_H
  1092. #include <sys/socket.h>
  1093. #endif
  1094. ])
  1095. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1096. AC_CHECK_SIZEOF(cell_t)
  1097. # Now make sure that NULL can be represented as zero bytes.
  1098. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1099. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1100. [[#include <stdlib.h>
  1101. #include <string.h>
  1102. #include <stdio.h>
  1103. #ifdef HAVE_STDDEF_H
  1104. #include <stddef.h>
  1105. #endif
  1106. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1107. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1108. [tor_cv_null_is_zero=yes],
  1109. [tor_cv_null_is_zero=no],
  1110. [tor_cv_null_is_zero=cross])])
  1111. if test "$tor_cv_null_is_zero" = "cross"; then
  1112. # Cross-compiling; let's hope that the target isn't raving mad.
  1113. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1114. fi
  1115. if test "$tor_cv_null_is_zero" != "no"; then
  1116. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1117. [Define to 1 iff memset(0) sets pointers to NULL])
  1118. fi
  1119. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1120. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1121. [[#include <stdlib.h>
  1122. #include <string.h>
  1123. #include <stdio.h>
  1124. #ifdef HAVE_STDDEF_H
  1125. #include <stddef.h>
  1126. #endif
  1127. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1128. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1129. [tor_cv_dbl0_is_zero=yes],
  1130. [tor_cv_dbl0_is_zero=no],
  1131. [tor_cv_dbl0_is_zero=cross])])
  1132. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1133. # Cross-compiling; let's hope that the target isn't raving mad.
  1134. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1135. fi
  1136. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1137. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1138. [Define to 1 iff memset(0) sets doubles to 0.0])
  1139. fi
  1140. # And what happens when we malloc zero?
  1141. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1142. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1143. [[#include <stdlib.h>
  1144. #include <string.h>
  1145. #include <stdio.h>
  1146. #ifdef HAVE_STDDEF_H
  1147. #include <stddef.h>
  1148. #endif
  1149. int main () { return malloc(0)?0:1; }]])],
  1150. [tor_cv_malloc_zero_works=yes],
  1151. [tor_cv_malloc_zero_works=no],
  1152. [tor_cv_malloc_zero_works=cross])])
  1153. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1154. # Cross-compiling; let's hope that the target isn't raving mad.
  1155. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1156. fi
  1157. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1158. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1159. [Define to 1 iff malloc(0) returns a pointer])
  1160. fi
  1161. # whether we seem to be in a 2s-complement world.
  1162. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1163. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1164. [[int main () { int problem = ((-99) != (~99)+1);
  1165. return problem ? 1 : 0; }]])],
  1166. [tor_cv_twos_complement=yes],
  1167. [tor_cv_twos_complement=no],
  1168. [tor_cv_twos_complement=cross])])
  1169. if test "$tor_cv_twos_complement" = "cross"; then
  1170. # Cross-compiling; let's hope that the target isn't raving mad.
  1171. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1172. fi
  1173. if test "$tor_cv_twos_complement" != "no"; then
  1174. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1175. [Define to 1 iff we represent negative integers with
  1176. two's complement])
  1177. fi
  1178. # What does shifting a negative value do?
  1179. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1180. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1181. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1182. [tor_cv_sign_extend=yes],
  1183. [tor_cv_sign_extend=no],
  1184. [tor_cv_sign_extend=cross])])
  1185. if test "$tor_cv_sign_extend" = "cross"; then
  1186. # Cross-compiling; let's hope that the target isn't raving mad.
  1187. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1188. fi
  1189. if test "$tor_cv_sign_extend" != "no"; then
  1190. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1191. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1192. fi
  1193. # Whether we should use the dmalloc memory allocation debugging library.
  1194. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1195. AC_ARG_WITH(dmalloc,
  1196. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1197. [if [[ "$withval" = "yes" ]]; then
  1198. dmalloc=1
  1199. AC_MSG_RESULT(yes)
  1200. else
  1201. dmalloc=1
  1202. AC_MSG_RESULT(no)
  1203. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1204. )
  1205. if [[ $dmalloc -eq 1 ]]; then
  1206. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1207. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1208. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1209. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1210. fi
  1211. AC_ARG_WITH(tcmalloc,
  1212. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1213. [ tcmalloc=yes ], [ tcmalloc=no ])
  1214. if test "x$tcmalloc" = "xyes"; then
  1215. LDFLAGS="-ltcmalloc $LDFLAGS"
  1216. fi
  1217. using_custom_malloc=no
  1218. if test "x$enable_openbsd_malloc" = "xyes"; then
  1219. using_custom_malloc=yes
  1220. fi
  1221. if test "x$tcmalloc" = "xyes"; then
  1222. using_custom_malloc=yes
  1223. fi
  1224. if test "$using_custom_malloc" = "no"; then
  1225. AC_CHECK_FUNCS(mallinfo)
  1226. fi
  1227. # By default, we're going to assume we don't have mlockall()
  1228. # bionic and other platforms have various broken mlockall subsystems.
  1229. # Some systems don't have a working mlockall, some aren't linkable,
  1230. # and some have it but don't declare it.
  1231. AC_CHECK_FUNCS(mlockall)
  1232. AC_CHECK_DECLS([mlockall], , , [
  1233. #ifdef HAVE_SYS_MMAN_H
  1234. #include <sys/mman.h>
  1235. #endif])
  1236. # Allow user to specify an alternate syslog facility
  1237. AC_ARG_WITH(syslog-facility,
  1238. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1239. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1240. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1241. AC_SUBST(LOGFACILITY)
  1242. # Check if we have getresuid and getresgid
  1243. AC_CHECK_FUNCS(getresuid getresgid)
  1244. # Check for gethostbyname_r in all its glorious incompatible versions.
  1245. # (This logic is based on that in Python's configure.in)
  1246. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1247. [Define this if you have any gethostbyname_r()])
  1248. AC_CHECK_FUNC(gethostbyname_r, [
  1249. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1250. OLD_CFLAGS=$CFLAGS
  1251. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1252. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1253. #include <netdb.h>
  1254. ], [[
  1255. char *cp1, *cp2;
  1256. struct hostent *h1, *h2;
  1257. int i1, i2;
  1258. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1259. ]])],[
  1260. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1261. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1262. [Define this if gethostbyname_r takes 6 arguments])
  1263. AC_MSG_RESULT(6)
  1264. ], [
  1265. AC_TRY_COMPILE([
  1266. #include <netdb.h>
  1267. ], [
  1268. char *cp1, *cp2;
  1269. struct hostent *h1;
  1270. int i1, i2;
  1271. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1272. ], [
  1273. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1274. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1275. [Define this if gethostbyname_r takes 5 arguments])
  1276. AC_MSG_RESULT(5)
  1277. ], [
  1278. AC_TRY_COMPILE([
  1279. #include <netdb.h>
  1280. ], [
  1281. char *cp1;
  1282. struct hostent *h1;
  1283. struct hostent_data hd;
  1284. (void) gethostbyname_r(cp1,h1,&hd);
  1285. ], [
  1286. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1287. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1288. [Define this if gethostbyname_r takes 3 arguments])
  1289. AC_MSG_RESULT(3)
  1290. ], [
  1291. AC_MSG_RESULT(0)
  1292. ])
  1293. ])
  1294. ])
  1295. CFLAGS=$OLD_CFLAGS
  1296. ])
  1297. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1298. tor_cv_have_func_macro,
  1299. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1300. #include <stdio.h>
  1301. int main(int c, char **v) { puts(__func__); }])],
  1302. tor_cv_have_func_macro=yes,
  1303. tor_cv_have_func_macro=no))
  1304. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1305. tor_cv_have_FUNC_macro,
  1306. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1307. #include <stdio.h>
  1308. int main(int c, char **v) { puts(__FUNC__); }])],
  1309. tor_cv_have_FUNC_macro=yes,
  1310. tor_cv_have_FUNC_macro=no))
  1311. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1312. tor_cv_have_FUNCTION_macro,
  1313. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1314. #include <stdio.h>
  1315. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1316. tor_cv_have_FUNCTION_macro=yes,
  1317. tor_cv_have_FUNCTION_macro=no))
  1318. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1319. tor_cv_have_environ_declared,
  1320. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1321. #ifdef HAVE_UNISTD_H
  1322. #include <unistd.h>
  1323. #endif
  1324. #include <stdlib.h>
  1325. int main(int c, char **v) { char **t = environ; }])],
  1326. tor_cv_have_environ_declared=yes,
  1327. tor_cv_have_environ_declared=no))
  1328. if test "$tor_cv_have_func_macro" = "yes"; then
  1329. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1330. fi
  1331. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1332. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1333. fi
  1334. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1335. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1336. [Defined if the compiler supports __FUNCTION__])
  1337. fi
  1338. if test "$tor_cv_have_environ_declared" = "yes"; then
  1339. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1340. [Defined if we have extern char **environ already declared])
  1341. fi
  1342. # $prefix stores the value of the --prefix command line option, or
  1343. # NONE if the option wasn't set. In the case that it wasn't set, make
  1344. # it be the default, so that we can use it to expand directories now.
  1345. if test "x$prefix" = "xNONE"; then
  1346. prefix=$ac_default_prefix
  1347. fi
  1348. # and similarly for $exec_prefix
  1349. if test "x$exec_prefix" = "xNONE"; then
  1350. exec_prefix=$prefix
  1351. fi
  1352. if test "x$BUILDDIR" = "x"; then
  1353. BUILDDIR=`pwd`
  1354. fi
  1355. AC_SUBST(BUILDDIR)
  1356. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1357. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1358. if test "x$CONFDIR" = "x"; then
  1359. CONFDIR=`eval echo $sysconfdir/tor`
  1360. fi
  1361. AC_SUBST(CONFDIR)
  1362. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1363. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1364. BINDIR=`eval echo $bindir`
  1365. AC_SUBST(BINDIR)
  1366. LOCALSTATEDIR=`eval echo $localstatedir`
  1367. AC_SUBST(LOCALSTATEDIR)
  1368. if test "$bwin32" = "true"; then
  1369. # Test if the linker supports the --nxcompat and --dynamicbase options
  1370. # for Windows
  1371. save_LDFLAGS="$LDFLAGS"
  1372. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1373. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1374. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1375. [AC_MSG_RESULT([yes])]
  1376. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1377. [AC_MSG_RESULT([no])]
  1378. )
  1379. LDFLAGS="$save_LDFLAGS"
  1380. fi
  1381. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1382. # than autoconf's macros like.
  1383. if test "$GCC" = "yes"; then
  1384. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1385. # accident waiting to happen.
  1386. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1387. else
  1388. # Override optimization level for non-gcc compilers
  1389. CFLAGS="$CFLAGS -O"
  1390. enable_gcc_warnings=no
  1391. enable_gcc_warnings_advisory=no
  1392. fi
  1393. # Warnings implies advisory-warnings and -Werror.
  1394. if test "$enable_gcc_warnings" = "yes"; then
  1395. enable_gcc_warnings_advisory=yes
  1396. enable_fatal_warnings=yes
  1397. fi
  1398. # OS X Lion started deprecating the system openssl. Let's just disable
  1399. # all deprecation warnings on OS X. Also, to potentially make the binary
  1400. # a little smaller, let's enable dead_strip.
  1401. case "$host_os" in
  1402. darwin*)
  1403. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1404. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1405. esac
  1406. # Add some more warnings which we use in development but not in the
  1407. # released versions. (Some relevant gcc versions can't handle these.)
  1408. #
  1409. # Note that we have to do this near the end of the autoconf process, or
  1410. # else we may run into problems when these warnings hit on the testing C
  1411. # programs that autoconf wants to build.
  1412. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1413. case "$host" in
  1414. *-*-openbsd* | *-*-bitrig*)
  1415. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1416. # That's fine, except that the headers don't pass -Wredundant-decls.
  1417. # Therefore, let's disable -Wsystem-headers when we're building
  1418. # with maximal warnings on OpenBSD.
  1419. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1420. esac
  1421. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1422. # have it work better.
  1423. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1424. # This warning was added in gcc 4.3, but it appears to generate
  1425. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1426. #CFLAGS="$CFLAGS -Wlogical-op"
  1427. m4_foreach_w([warning_flag], [
  1428. -Waddress
  1429. -Waddress-of-array-temporary
  1430. -Waddress-of-temporary
  1431. -Wambiguous-macro
  1432. -Wanonymous-pack-parens
  1433. -Warc
  1434. -Warc-abi
  1435. -Warc-bridge-casts-disallowed-in-nonarc
  1436. -Warc-maybe-repeated-use-of-weak
  1437. -Warc-performSelector-leaks
  1438. -Warc-repeated-use-of-weak
  1439. -Warray-bounds
  1440. -Warray-bounds-pointer-arithmetic
  1441. -Wasm
  1442. -Wasm-operand-widths
  1443. -Watomic-properties
  1444. -Watomic-property-with-user-defined-accessor
  1445. -Wauto-import
  1446. -Wauto-storage-class
  1447. -Wauto-var-id
  1448. -Wavailability
  1449. -Wbackslash-newline-escape
  1450. -Wbad-array-new-length
  1451. -Wbind-to-temporary-copy
  1452. -Wbitfield-constant-conversion
  1453. -Wbool-conversion
  1454. -Wbool-conversions
  1455. -Wbuiltin-requires-header
  1456. -Wchar-align
  1457. -Wcompare-distinct-pointer-types
  1458. -Wcomplex-component-init
  1459. -Wconditional-type-mismatch
  1460. -Wconfig-macros
  1461. -Wconstant-conversion
  1462. -Wconstant-logical-operand
  1463. -Wconstexpr-not-const
  1464. -Wcustom-atomic-properties
  1465. -Wdangling-field
  1466. -Wdangling-initializer-list
  1467. -Wdate-time
  1468. -Wdelegating-ctor-cycles
  1469. -Wdeprecated-implementations
  1470. -Wdeprecated-register
  1471. -Wdirect-ivar-access
  1472. -Wdiscard-qual
  1473. -Wdistributed-object-modifiers
  1474. -Wdivision-by-zero
  1475. -Wdollar-in-identifier-extension
  1476. -Wdouble-promotion
  1477. -Wduplicate-decl-specifier
  1478. -Wduplicate-enum
  1479. -Wduplicate-method-arg
  1480. -Wduplicate-method-match
  1481. -Wduplicated-cond
  1482. -Wdynamic-class-memaccess
  1483. -Wembedded-directive
  1484. -Wempty-translation-unit
  1485. -Wenum-conversion
  1486. -Wexit-time-destructors
  1487. -Wexplicit-ownership-type
  1488. -Wextern-initializer
  1489. -Wextra
  1490. -Wextra-semi
  1491. -Wextra-tokens
  1492. -Wflexible-array-extensions
  1493. -Wfloat-conversion
  1494. -Wformat-non-iso
  1495. -Wfour-char-constants
  1496. -Wgcc-compat
  1497. -Wglobal-constructors
  1498. -Wgnu-array-member-paren-init
  1499. -Wgnu-designator
  1500. -Wgnu-static-float-init
  1501. -Wheader-guard
  1502. -Wheader-hygiene
  1503. -Widiomatic-parentheses
  1504. -Wignored-attributes
  1505. -Wimplicit-atomic-properties
  1506. -Wimplicit-conversion-floating-point-to-bool
  1507. -Wimplicit-exception-spec-mismatch
  1508. -Wimplicit-fallthrough
  1509. -Wimplicit-fallthrough-per-function
  1510. -Wimplicit-retain-self
  1511. -Wimport-preprocessor-directive-pedantic
  1512. -Wincompatible-library-redeclaration
  1513. -Wincompatible-pointer-types-discards-qualifiers
  1514. -Wincomplete-implementation
  1515. -Wincomplete-module
  1516. -Wincomplete-umbrella
  1517. -Winit-self
  1518. -Wint-conversions
  1519. -Wint-to-void-pointer-cast
  1520. -Winteger-overflow
  1521. -Winvalid-constexpr
  1522. -Winvalid-iboutlet
  1523. -Winvalid-noreturn
  1524. -Winvalid-pp-token
  1525. -Winvalid-source-encoding
  1526. -Winvalid-token-paste
  1527. -Wknr-promoted-parameter
  1528. -Wlanguage-extension-token
  1529. -Wlarge-by-value-copy
  1530. -Wliteral-conversion
  1531. -Wliteral-range
  1532. -Wlocal-type-template-args
  1533. -Wlogical-op
  1534. -Wloop-analysis
  1535. -Wmain-return-type
  1536. -Wmalformed-warning-check
  1537. -Wmethod-signatures
  1538. -Wmicrosoft
  1539. -Wmicrosoft-exists
  1540. -Wmismatched-parameter-types
  1541. -Wmismatched-return-types
  1542. -Wmissing-field-initializers
  1543. -Wmissing-format-attribute
  1544. -Wmissing-noreturn
  1545. -Wmissing-selector-name
  1546. -Wmissing-sysroot
  1547. -Wmissing-variable-declarations
  1548. -Wmodule-conflict
  1549. -Wnested-anon-types
  1550. -Wnewline-eof
  1551. -Wnon-literal-null-conversion
  1552. -Wnon-pod-varargs
  1553. -Wnonportable-cfstrings
  1554. -Wnormalized=id
  1555. -Wnull-arithmetic
  1556. -Wnull-character
  1557. -Wnull-conversion
  1558. -Wnull-dereference
  1559. -Wout-of-line-declaration
  1560. -Wover-aligned
  1561. -Woverlength-strings
  1562. -Woverride-init
  1563. -Woverriding-method-mismatch
  1564. -Wpointer-type-mismatch
  1565. -Wpredefined-identifier-outside-function
  1566. -Wprotocol-property-synthesis-ambiguity
  1567. -Wreadonly-iboutlet-property
  1568. -Wreadonly-setter-attrs
  1569. -Wreceiver-expr
  1570. -Wreceiver-forward-class
  1571. -Wreceiver-is-weak
  1572. -Wreinterpret-base-class
  1573. -Wrequires-super-attribute
  1574. -Wreserved-user-defined-literal
  1575. -Wreturn-stack-address
  1576. -Wsection
  1577. -Wselector-type-mismatch
  1578. -Wsentinel
  1579. -Wserialized-diagnostics
  1580. -Wshadow
  1581. -Wshift-count-negative
  1582. -Wshift-count-overflow
  1583. -Wshift-negative-value
  1584. -Wshift-overflow=2
  1585. -Wshift-sign-overflow
  1586. -Wshorten-64-to-32
  1587. -Wsizeof-array-argument
  1588. -Wsource-uses-openmp
  1589. -Wstatic-float-init
  1590. -Wstatic-in-inline
  1591. -Wstatic-local-in-inline
  1592. -Wstrict-overflow=2
  1593. -Wstring-compare
  1594. -Wstring-conversion
  1595. -Wstrlcpy-strlcat-size
  1596. -Wstrncat-size
  1597. -Wsuggest-attribute=format
  1598. -Wsuggest-attribute=noreturn
  1599. -Wsuper-class-method-mismatch
  1600. -Wswitch-bool
  1601. -Wsync-nand
  1602. -Wtautological-constant-out-of-range-compare
  1603. -Wtentative-definition-incomplete-type
  1604. -Wtrampolines
  1605. -Wtype-safety
  1606. -Wtypedef-redefinition
  1607. -Wtypename-missing
  1608. -Wundefined-inline
  1609. -Wundefined-internal
  1610. -Wundefined-reinterpret-cast
  1611. -Wunicode
  1612. -Wunicode-whitespace
  1613. -Wunknown-warning-option
  1614. -Wunnamed-type-template-args
  1615. -Wunneeded-member-function
  1616. -Wunsequenced
  1617. -Wunsupported-visibility
  1618. -Wunused-but-set-parameter
  1619. -Wunused-but-set-variable
  1620. -Wunused-command-line-argument
  1621. -Wunused-const-variable=2
  1622. -Wunused-exception-parameter
  1623. -Wunused-local-typedefs
  1624. -Wunused-member-function
  1625. -Wunused-sanitize-argument
  1626. -Wunused-volatile-lvalue
  1627. -Wuser-defined-literals
  1628. -Wvariadic-macros
  1629. -Wvector-conversion
  1630. -Wvector-conversions
  1631. -Wvexing-parse
  1632. -Wvisibility
  1633. -Wvla-extension
  1634. -Wzero-length-array
  1635. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1636. dnl These seem to require annotations that we don't currently use,
  1637. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1638. dnl -Wthread-safety
  1639. dnl -Wthread-safety-analysis
  1640. dnl -Wthread-safety-attributes
  1641. dnl -Wthread-safety-beta
  1642. dnl -Wthread-safety-precise
  1643. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1644. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1645. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1646. CFLAGS="$CFLAGS -Wwrite-strings"
  1647. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1648. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1649. CFLAGS="$CFLAGS -Wunused-parameter "
  1650. # These interfere with building main() { return 0; }, which autoconf
  1651. # likes to use as its default program.
  1652. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1653. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1654. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1655. fi
  1656. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1657. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1658. fi
  1659. if test "x$enable_fatal_warnings" = "xyes"; then
  1660. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1661. # default autoconf programs are full of errors.
  1662. CFLAGS="$CFLAGS -Werror"
  1663. fi
  1664. fi
  1665. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1666. case "$host_os" in
  1667. darwin*)
  1668. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1669. esac
  1670. fi
  1671. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1672. AC_CONFIG_FILES([
  1673. Doxyfile
  1674. Makefile
  1675. contrib/dist/suse/tor.sh
  1676. contrib/operator-tools/tor.logrotate
  1677. contrib/dist/tor.sh
  1678. contrib/dist/torctl
  1679. contrib/dist/tor.service
  1680. src/config/torrc.sample
  1681. src/config/torrc.minimal
  1682. scripts/maint/checkOptionDocs.pl
  1683. scripts/maint/updateVersions.pl
  1684. ])
  1685. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1686. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1687. for file in $regular_mans ; do
  1688. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1689. echo "==================================";
  1690. echo;
  1691. echo "Building Tor has failed since manpages cannot be built.";
  1692. echo;
  1693. echo "You need asciidoc installed to be able to build the manpages.";
  1694. echo "To build without manpages, use the --disable-asciidoc argument";
  1695. echo "when calling configure.";
  1696. echo;
  1697. echo "==================================";
  1698. exit 1;
  1699. fi
  1700. done
  1701. fi
  1702. AC_OUTPUT