configure.ac 61 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],[0.3.1.0-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  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. AC_ARG_ENABLE(libfuzzer,
  45. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  46. AC_ARG_ENABLE(oss-fuzz,
  47. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  48. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  49. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  50. fi
  51. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  52. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  53. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  54. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  55. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  56. if test "$enable_static_tor" = "yes"; then
  57. enable_static_libevent="yes";
  58. enable_static_openssl="yes";
  59. enable_static_zlib="yes";
  60. CFLAGS="$CFLAGS -static"
  61. fi
  62. if test "$enable_system_torrc" = "no"; then
  63. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  64. [Defined if we're not going to look for a torrc in SYSCONF])
  65. fi
  66. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  67. AC_ARG_ENABLE(asciidoc,
  68. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  69. [case "${enableval}" in
  70. "yes") asciidoc=true ;;
  71. "no") asciidoc=false ;;
  72. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  73. esac], [asciidoc=true])
  74. # systemd notify support
  75. AC_ARG_ENABLE(systemd,
  76. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  77. [case "${enableval}" in
  78. "yes") systemd=true ;;
  79. "no") systemd=false ;;
  80. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  81. esac], [systemd=auto])
  82. # systemd support
  83. if test "x$enable_systemd" = "xno"; then
  84. have_systemd=no;
  85. else
  86. PKG_CHECK_MODULES(SYSTEMD,
  87. [libsystemd-daemon],
  88. have_systemd=yes,
  89. have_systemd=no)
  90. if test "x$have_systemd" = "xno"; then
  91. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  92. PKG_CHECK_MODULES(SYSTEMD,
  93. [libsystemd],
  94. have_systemd=yes,
  95. have_systemd=no)
  96. fi
  97. fi
  98. if test "x$have_systemd" = "xyes"; then
  99. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  100. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  101. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  102. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  103. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  104. fi
  105. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  106. AC_SUBST(TOR_SYSTEMD_LIBS)
  107. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  108. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  109. fi
  110. case "$host" in
  111. *-*-solaris* )
  112. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  113. ;;
  114. esac
  115. AC_ARG_ENABLE(gcc-warnings,
  116. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  117. AC_ARG_ENABLE(fatal-warnings,
  118. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  119. AC_ARG_ENABLE(gcc-warnings-advisory,
  120. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  121. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  122. AC_ARG_ENABLE(gcc-hardening,
  123. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  124. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  125. AC_ARG_ENABLE(expensive-hardening,
  126. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  127. AC_ARG_ENABLE(fragile-hardening,
  128. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  129. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  130. fragile_hardening="yes"
  131. fi
  132. dnl Linker hardening options
  133. dnl Currently these options are ELF specific - you can't use this with MacOSX
  134. AC_ARG_ENABLE(linker-hardening,
  135. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  136. AC_ARG_ENABLE(local-appdata,
  137. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  138. if test "$enable_local_appdata" = "yes"; then
  139. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  140. [Defined if we default to host local appdata paths on Windows])
  141. fi
  142. # Tor2web mode flag
  143. AC_ARG_ENABLE(tor2web-mode,
  144. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  145. [if test "x$enableval" = "xyes"; then
  146. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  147. fi])
  148. AC_ARG_ENABLE(tool-name-check,
  149. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  150. AC_ARG_ENABLE(seccomp,
  151. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  152. AC_ARG_ENABLE(libscrypt,
  153. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  154. dnl check for the correct "ar" when cross-compiling.
  155. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  156. dnl so kludge up a replacement for the case where it isn't there yet.)
  157. m4_ifdef([AM_PROG_AR],
  158. [AM_PROG_AR],
  159. [AN_MAKEVAR([AR], [AC_PROG_AR])
  160. AN_PROGRAM([ar], [AC_PROG_AR])
  161. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  162. AC_PROG_AR])
  163. dnl Check whether the above macro has settled for a simply named tool even
  164. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  165. dnl because that will find any cc on the system, not only the cross-compiler,
  166. dnl and then verify that a binary built with this compiler runs on the
  167. dnl build system. It will then come to the false conclusion that we're not
  168. dnl cross-compiling.
  169. if test "x$enable_tool_name_check" != "xno"; then
  170. if test "x$ac_tool_warned" = "xyes"; then
  171. 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.)])
  172. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  173. 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.)])
  174. fi
  175. fi
  176. AC_PROG_CC
  177. AC_PROG_CPP
  178. AC_PROG_MAKE_SET
  179. AC_PROG_RANLIB
  180. AC_PROG_SED
  181. AC_ARG_VAR([PERL], [path to Perl binary])
  182. AC_CHECK_PROGS([PERL], [perl])
  183. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  184. dnl check for asciidoc and a2x
  185. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  186. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  187. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  188. AM_PROG_CC_C_O
  189. AC_PROG_CC_C99
  190. AC_ARG_VAR([PYTHON], [path to Python binary])
  191. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  192. if test "x$PYTHON" = "x"; then
  193. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  194. fi
  195. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  196. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  197. AC_C_FLEXIBLE_ARRAY_MEMBER
  198. ], [
  199. dnl Maybe we've got an old autoconf...
  200. AC_CACHE_CHECK([for flexible array members],
  201. tor_cv_c_flexarray,
  202. [AC_COMPILE_IFELSE(
  203. AC_LANG_PROGRAM([
  204. struct abc { int a; char b[]; };
  205. ], [
  206. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  207. def->b[0] = 33;
  208. ]),
  209. [tor_cv_c_flexarray=yes],
  210. [tor_cv_c_flexarray=no])])
  211. if test "$tor_cv_flexarray" = "yes"; then
  212. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  213. else
  214. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  215. fi
  216. ])
  217. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  218. tor_cv_c_c99_decl,
  219. [AC_COMPILE_IFELSE(
  220. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  221. [tor_cv_c_c99_decl=yes],
  222. [tor_cv_c_c99_decl=no] )])
  223. if test "$tor_cv_c_c99_decl" != "yes"; then
  224. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  225. fi
  226. AC_CACHE_CHECK([for working C99 designated initializers],
  227. tor_cv_c_c99_designated_init,
  228. [AC_COMPILE_IFELSE(
  229. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  230. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  231. [tor_cv_c_c99_designated_init=yes],
  232. [tor_cv_c_c99_designated_init=no] )])
  233. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  234. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  235. fi
  236. TORUSER=_tor
  237. AC_ARG_WITH(tor-user,
  238. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  239. [
  240. TORUSER=$withval
  241. ]
  242. )
  243. AC_SUBST(TORUSER)
  244. TORGROUP=_tor
  245. AC_ARG_WITH(tor-group,
  246. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  247. [
  248. TORGROUP=$withval
  249. ]
  250. )
  251. AC_SUBST(TORGROUP)
  252. dnl If _WIN32 is defined and non-zero, we are building for win32
  253. AC_MSG_CHECKING([for win32])
  254. AC_RUN_IFELSE([AC_LANG_SOURCE([
  255. int main(int c, char **v) {
  256. #ifdef _WIN32
  257. #if _WIN32
  258. return 0;
  259. #else
  260. return 1;
  261. #endif
  262. #else
  263. return 2;
  264. #endif
  265. }])],
  266. bwin32=true; AC_MSG_RESULT([yes]),
  267. bwin32=false; AC_MSG_RESULT([no]),
  268. bwin32=cross; AC_MSG_RESULT([cross])
  269. )
  270. if test "$bwin32" = "cross"; then
  271. AC_MSG_CHECKING([for win32 (cross)])
  272. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  273. #ifdef _WIN32
  274. int main(int c, char **v) {return 0;}
  275. #else
  276. #error
  277. int main(int c, char **v) {return x(y);}
  278. #endif
  279. ])],
  280. bwin32=true; AC_MSG_RESULT([yes]),
  281. bwin32=false; AC_MSG_RESULT([no]))
  282. fi
  283. AH_BOTTOM([
  284. #ifdef _WIN32
  285. /* Defined to access windows functions and definitions for >=WinXP */
  286. # ifndef WINVER
  287. # define WINVER 0x0501
  288. # endif
  289. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  290. # ifndef _WIN32_WINNT
  291. # define _WIN32_WINNT 0x0501
  292. # endif
  293. /* Defined to avoid including some windows headers as part of Windows.h */
  294. # ifndef WIN32_LEAN_AND_MEAN
  295. # define WIN32_LEAN_AND_MEAN 1
  296. # endif
  297. #endif
  298. ])
  299. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  300. dnl Enable C99 when compiling with MIPSpro
  301. AC_MSG_CHECKING([for MIPSpro compiler])
  302. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  303. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  304. #error
  305. return x(y);
  306. #endif
  307. ])],
  308. bmipspro=false; AC_MSG_RESULT(no),
  309. bmipspro=true; AC_MSG_RESULT(yes))
  310. if test "$bmipspro" = "true"; then
  311. CFLAGS="$CFLAGS -c99"
  312. fi
  313. AC_C_BIGENDIAN
  314. AC_SEARCH_LIBS(socket, [socket network])
  315. AC_SEARCH_LIBS(gethostbyname, [nsl])
  316. AC_SEARCH_LIBS(dlopen, [dl])
  317. AC_SEARCH_LIBS(inet_aton, [resolv])
  318. AC_SEARCH_LIBS(backtrace, [execinfo])
  319. saved_LIBS="$LIBS"
  320. AC_SEARCH_LIBS([clock_gettime], [rt])
  321. if test "$LIBS" != "$saved_LIBS"; then
  322. # Looks like we need -lrt for clock_gettime().
  323. have_rt=yes
  324. fi
  325. AC_SEARCH_LIBS(pthread_create, [pthread])
  326. AC_SEARCH_LIBS(pthread_detach, [pthread])
  327. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  328. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  329. AC_CHECK_FUNCS(
  330. _NSGetEnviron \
  331. RtlSecureZeroMemory \
  332. SecureZeroMemory \
  333. accept4 \
  334. backtrace \
  335. backtrace_symbols_fd \
  336. eventfd \
  337. explicit_bzero \
  338. timingsafe_memcmp \
  339. flock \
  340. ftime \
  341. getaddrinfo \
  342. getifaddrs \
  343. getpass \
  344. getrlimit \
  345. gettimeofday \
  346. gmtime_r \
  347. htonll \
  348. inet_aton \
  349. ioctl \
  350. issetugid \
  351. llround \
  352. localtime_r \
  353. lround \
  354. memmem \
  355. memset_s \
  356. pipe \
  357. pipe2 \
  358. prctl \
  359. readpassphrase \
  360. rint \
  361. sigaction \
  362. socketpair \
  363. statvfs \
  364. strlcat \
  365. strlcpy \
  366. strnlen \
  367. strptime \
  368. strtok_r \
  369. strtoull \
  370. sysconf \
  371. sysctl \
  372. truncate \
  373. uname \
  374. usleep \
  375. vasprintf \
  376. _vscprintf
  377. )
  378. # Apple messed up when they added two functions functions in Sierra: they
  379. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  380. # checks. So we should only probe for those functions if we are sure that we
  381. # are not targetting OSX 10.11 or earlier.
  382. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  383. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  384. #ifdef __APPLE__
  385. # include <AvailabilityMacros.h>
  386. # ifndef MAC_OS_X_VERSION_10_12
  387. # define MAC_OS_X_VERSION_10_12 101200
  388. # endif
  389. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  390. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  391. # error "Running on Mac OSX 10.11 or earlier"
  392. # endif
  393. # endif
  394. #endif
  395. ]], [[]])],
  396. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  397. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  398. if test "$on_macos_pre_10_12" = "no"; then
  399. AC_CHECK_FUNCS(
  400. clock_gettime \
  401. getentropy \
  402. )
  403. fi
  404. if test "$bwin32" != "true"; then
  405. AC_CHECK_HEADERS(pthread.h)
  406. AC_CHECK_FUNCS(pthread_create)
  407. AC_CHECK_FUNCS(pthread_condattr_setclock)
  408. fi
  409. if test "$bwin32" = "true"; then
  410. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  411. #include <windows.h>
  412. #include <conio.h>
  413. #include <wchar.h>
  414. ])
  415. fi
  416. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  417. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  418. dnl ------------------------------------------------------
  419. dnl Where do you live, libevent? And how do we call you?
  420. if test "$bwin32" = "true"; then
  421. TOR_LIB_WS32=-lws2_32
  422. TOR_LIB_IPHLPAPI=-liphlpapi
  423. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  424. # think it's actually necessary.
  425. TOR_LIB_GDI=-lgdi32
  426. else
  427. TOR_LIB_WS32=
  428. TOR_LIB_GDI=
  429. fi
  430. AC_SUBST(TOR_LIB_WS32)
  431. AC_SUBST(TOR_LIB_GDI)
  432. AC_SUBST(TOR_LIB_IPHLPAPI)
  433. tor_libevent_pkg_redhat="libevent"
  434. tor_libevent_pkg_debian="libevent-dev"
  435. tor_libevent_devpkg_redhat="libevent-devel"
  436. tor_libevent_devpkg_debian="libevent-dev"
  437. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  438. dnl linking for static builds.
  439. STATIC_LIBEVENT_FLAGS=""
  440. if test "$enable_static_libevent" = "yes"; then
  441. if test "$have_rt" = "yes"; then
  442. STATIC_LIBEVENT_FLAGS=" -lrt "
  443. fi
  444. fi
  445. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  446. #ifdef _WIN32
  447. #include <winsock2.h>
  448. #endif
  449. #include <sys/time.h>
  450. #include <sys/types.h>
  451. #include <event2/event.h>], [
  452. #ifdef _WIN32
  453. #include <winsock2.h>
  454. #endif
  455. struct event_base;
  456. struct event_base *event_base_new(void);],
  457. [
  458. #ifdef _WIN32
  459. {WSADATA d; WSAStartup(0x101,&d); }
  460. #endif
  461. event_base_new();
  462. ], [--with-libevent-dir], [/opt/libevent])
  463. dnl Determine the incantation needed to link libevent.
  464. save_LIBS="$LIBS"
  465. save_LDFLAGS="$LDFLAGS"
  466. save_CPPFLAGS="$CPPFLAGS"
  467. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  468. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  469. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  470. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  471. if test "$enable_static_libevent" = "yes"; then
  472. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  473. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  474. else
  475. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  476. fi
  477. else
  478. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  479. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  480. 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"))
  481. if test "$ac_cv_search_event_new" != "none required"; then
  482. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  483. fi
  484. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  485. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  486. fi
  487. else
  488. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  489. fi
  490. fi
  491. dnl Now check for particular libevent functions.
  492. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  493. evutil_secure_rng_add_bytes \
  494. ])
  495. LIBS="$save_LIBS"
  496. LDFLAGS="$save_LDFLAGS"
  497. CPPFLAGS="$save_CPPFLAGS"
  498. dnl Check that libevent is at least at version 2.0.10, the first stable
  499. dnl release of its series
  500. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  501. AC_MSG_CHECKING([whether Libevent is new enough])
  502. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  503. #include <event2/event.h>
  504. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  505. #error
  506. int x = y(zz);
  507. #else
  508. int x = 1;
  509. #endif
  510. ])], [ AC_MSG_RESULT([yes]) ],
  511. [ AC_MSG_RESULT([no])
  512. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  513. LIBS="$save_LIBS"
  514. LDFLAGS="$save_LDFLAGS"
  515. CPPFLAGS="$save_CPPFLAGS"
  516. AC_SUBST(TOR_LIBEVENT_LIBS)
  517. dnl ------------------------------------------------------
  518. dnl Where do you live, libm?
  519. dnl On some platforms (Haiku/BeOS) the math library is
  520. dnl part of libroot. In which case don't link against lm
  521. TOR_LIB_MATH=""
  522. save_LIBS="$LIBS"
  523. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  524. if test "$ac_cv_search_pow" != "none required"; then
  525. TOR_LIB_MATH="$ac_cv_search_pow"
  526. fi
  527. LIBS="$save_LIBS"
  528. AC_SUBST(TOR_LIB_MATH)
  529. dnl ------------------------------------------------------
  530. dnl Where do you live, openssl? And how do we call you?
  531. tor_openssl_pkg_redhat="openssl"
  532. tor_openssl_pkg_debian="libssl-dev"
  533. tor_openssl_devpkg_redhat="openssl-devel"
  534. tor_openssl_devpkg_debian="libssl-dev"
  535. ALT_openssl_WITHVAL=""
  536. AC_ARG_WITH(ssl-dir,
  537. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  538. [
  539. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  540. ALT_openssl_WITHVAL="$withval"
  541. fi
  542. ])
  543. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  544. [#include <openssl/rand.h>],
  545. [void RAND_add(const void *buf, int num, double entropy);],
  546. [RAND_add((void*)0,0,0);], [],
  547. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  548. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  549. if test "$enable_static_openssl" = "yes"; then
  550. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  551. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  552. else
  553. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  554. fi
  555. else
  556. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  557. fi
  558. AC_SUBST(TOR_OPENSSL_LIBS)
  559. dnl Now check for particular openssl functions.
  560. save_LIBS="$LIBS"
  561. save_LDFLAGS="$LDFLAGS"
  562. save_CPPFLAGS="$CPPFLAGS"
  563. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  564. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  565. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  566. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  567. #include <openssl/opensslv.h>
  568. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  569. #error "too old"
  570. #endif
  571. ]], [[]])],
  572. [ : ],
  573. [ AC_MSG_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  574. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  575. #include <openssl/opensslv.h>
  576. #include <openssl/evp.h>
  577. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  578. #error "no ECC"
  579. #endif
  580. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  581. #error "curves unavailable"
  582. #endif
  583. ]], [[]])],
  584. [ : ],
  585. [ AC_MSG_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  586. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  587. [#include <openssl/ssl.h>
  588. ])
  589. AC_CHECK_FUNCS([ \
  590. SSL_SESSION_get_master_key \
  591. SSL_get_server_random \
  592. SSL_get_client_ciphers \
  593. SSL_get_client_random \
  594. SSL_CIPHER_find \
  595. TLS_method
  596. ])
  597. dnl Check if OpenSSL has scrypt implementation.
  598. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  599. dnl Check if OpenSSL structures are opaque
  600. AC_CHECK_MEMBERS([SSL.state], , ,
  601. [#include <openssl/ssl.h>
  602. ])
  603. LIBS="$save_LIBS"
  604. LDFLAGS="$save_LDFLAGS"
  605. CPPFLAGS="$save_CPPFLAGS"
  606. dnl ------------------------------------------------------
  607. dnl Where do you live, zlib? And how do we call you?
  608. tor_zlib_pkg_redhat="zlib"
  609. tor_zlib_pkg_debian="zlib1g"
  610. tor_zlib_devpkg_redhat="zlib-devel"
  611. tor_zlib_devpkg_debian="zlib1g-dev"
  612. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  613. [#include <zlib.h>],
  614. [const char * zlibVersion(void);],
  615. [zlibVersion();], [--with-zlib-dir],
  616. [/opt/zlib])
  617. if test "$enable_static_zlib" = "yes"; then
  618. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  619. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  620. using --enable-static-zlib")
  621. else
  622. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  623. fi
  624. else
  625. TOR_ZLIB_LIBS="-lz"
  626. fi
  627. AC_SUBST(TOR_ZLIB_LIBS)
  628. dnl ----------------------------------------------------------------------
  629. dnl Check if libcap is available for capabilities.
  630. tor_cap_pkg_debian="libcap2"
  631. tor_cap_pkg_redhat="libcap"
  632. tor_cap_devpkg_debian="libcap-dev"
  633. tor_cap_devpkg_redhat="libcap-devel"
  634. AC_CHECK_LIB([cap], [cap_init], [],
  635. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  636. )
  637. AC_CHECK_FUNCS(cap_set_proc)
  638. dnl ---------------------------------------------------------------------
  639. dnl Now that we know about our major libraries, we can check for compiler
  640. dnl and linker hardening options. We need to do this with the libraries known,
  641. dnl since sometimes the linker will like an option but not be willing to
  642. dnl use it with a build of a library.
  643. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  644. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  645. CFLAGS_FTRAPV=
  646. CFLAGS_FWRAPV=
  647. CFLAGS_ASAN=
  648. CFLAGS_UBSAN=
  649. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  650. #if !defined(__clang__)
  651. #error
  652. #endif])], have_clang=yes, have_clang=no)
  653. if test "x$enable_gcc_hardening" != "xno"; then
  654. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  655. if test "x$have_clang" = "xyes"; then
  656. TOR_CHECK_CFLAGS(-Qunused-arguments)
  657. fi
  658. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  659. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  660. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  661. m4_ifdef([AS_VAR_IF],[
  662. AS_VAR_IF(can_compile, [yes],
  663. AS_VAR_IF(can_link, [yes],
  664. [],
  665. 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.)]))
  666. )])
  667. AS_VAR_POPDEF([can_link])
  668. AS_VAR_POPDEF([can_compile])
  669. TOR_CHECK_CFLAGS(-Wstack-protector)
  670. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  671. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  672. TOR_CHECK_CFLAGS(-fPIE)
  673. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  674. fi
  675. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  676. fi
  677. if test "$fragile_hardening" = "yes"; then
  678. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  679. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  680. AC_MSG_WARN([The compiler supports -ftrapv, but for some reason I was not able to link with -ftrapv. Are you missing run-time support? Run-time hardening will not work as well as it should.])
  681. fi
  682. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  683. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  684. fi
  685. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  686. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  687. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  688. fi
  689. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  690. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  691. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  692. fi
  693. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  694. fi
  695. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  696. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  697. mulodi_fixes_ftrapv=no
  698. if test "$have_clang" = "yes"; then
  699. saved_CFLAGS="$CFLAGS"
  700. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  701. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  702. AC_LINK_IFELSE([
  703. AC_LANG_SOURCE([[
  704. #include <stdint.h>
  705. #include <stdlib.h>
  706. int main(int argc, char **argv)
  707. {
  708. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  709. * (int64_t)atoi(argv[3]);
  710. return x == 9;
  711. } ]])],
  712. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  713. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  714. if test "$ftrapv_can_link" = "no"; then
  715. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  716. AC_LINK_IFELSE([
  717. AC_LANG_SOURCE([[
  718. #include <stdint.h>
  719. #include <stdlib.h>
  720. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  721. *overflow=0;
  722. return a;
  723. }
  724. int main(int argc, char **argv)
  725. {
  726. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  727. * (int64_t)atoi(argv[3]);
  728. return x == 9;
  729. } ]])],
  730. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  731. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  732. fi
  733. CFLAGS="$saved_CFLAGS"
  734. fi
  735. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  736. dnl These cflags add bunches of branches, and we haven't been able to
  737. dnl persuade ourselves that they're suitable for code that needs to be
  738. dnl constant time.
  739. AC_SUBST(CFLAGS_BUGTRAP)
  740. dnl These cflags are variant ones sutable for code that needs to be
  741. dnl constant-time.
  742. AC_SUBST(CFLAGS_CONSTTIME)
  743. if test "x$enable_linker_hardening" != "xno"; then
  744. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  745. fi
  746. # For backtrace support
  747. TOR_CHECK_LDFLAGS(-rdynamic)
  748. dnl ------------------------------------------------------
  749. dnl Now see if we have a -fomit-frame-pointer compiler option.
  750. saved_CFLAGS="$CFLAGS"
  751. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  752. F_OMIT_FRAME_POINTER=''
  753. if test "$saved_CFLAGS" != "$CFLAGS"; then
  754. if test "$fragile_hardening" = "yes"; then
  755. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  756. fi
  757. fi
  758. CFLAGS="$saved_CFLAGS"
  759. AC_SUBST(F_OMIT_FRAME_POINTER)
  760. dnl ------------------------------------------------------
  761. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  762. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  763. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  764. dnl code will work.
  765. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  766. dnl ============================================================
  767. dnl Check for libseccomp
  768. if test "x$enable_seccomp" != "xno"; then
  769. AC_CHECK_HEADERS([seccomp.h])
  770. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  771. fi
  772. dnl ============================================================
  773. dnl Check for libscrypt
  774. if test "x$enable_libscrypt" != "xno"; then
  775. AC_CHECK_HEADERS([libscrypt.h])
  776. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  777. AC_CHECK_FUNCS([libscrypt_scrypt])
  778. fi
  779. dnl ============================================================
  780. dnl We need an implementation of curve25519.
  781. dnl set these defaults.
  782. build_curve25519_donna=no
  783. build_curve25519_donna_c64=no
  784. use_curve25519_donna=no
  785. use_curve25519_nacl=no
  786. CURVE25519_LIBS=
  787. dnl The best choice is using curve25519-donna-c64, but that requires
  788. dnl that we
  789. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  790. tor_cv_can_use_curve25519_donna_c64,
  791. [AC_RUN_IFELSE(
  792. [AC_LANG_PROGRAM([dnl
  793. #include <stdint.h>
  794. typedef unsigned uint128_t __attribute__((mode(TI)));
  795. int func(uint64_t a, uint64_t b) {
  796. uint128_t c = ((uint128_t)a) * b;
  797. int ok = ((uint64_t)(c>>96)) == 522859 &&
  798. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  799. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  800. (((uint64_t)(c))&0xffffffffL) == 0;
  801. return ok;
  802. }
  803. ], [dnl
  804. int ok = func( ((uint64_t)2000000000) * 1000000000,
  805. ((uint64_t)1234567890) << 24);
  806. return !ok;
  807. ])],
  808. [tor_cv_can_use_curve25519_donna_c64=yes],
  809. [tor_cv_can_use_curve25519_donna_c64=no],
  810. [AC_LINK_IFELSE(
  811. [AC_LANG_PROGRAM([dnl
  812. #include <stdint.h>
  813. typedef unsigned uint128_t __attribute__((mode(TI)));
  814. int func(uint64_t a, uint64_t b) {
  815. uint128_t c = ((uint128_t)a) * b;
  816. int ok = ((uint64_t)(c>>96)) == 522859 &&
  817. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  818. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  819. (((uint64_t)(c))&0xffffffffL) == 0;
  820. return ok;
  821. }
  822. ], [dnl
  823. int ok = func( ((uint64_t)2000000000) * 1000000000,
  824. ((uint64_t)1234567890) << 24);
  825. return !ok;
  826. ])],
  827. [tor_cv_can_use_curve25519_donna_c64=cross],
  828. [tor_cv_can_use_curve25519_donna_c64=no])])])
  829. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  830. nacl/crypto_scalarmult_curve25519.h])
  831. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  832. tor_cv_can_use_curve25519_nacl,
  833. [tor_saved_LIBS="$LIBS"
  834. LIBS="$LIBS -lnacl"
  835. AC_LINK_IFELSE(
  836. [AC_LANG_PROGRAM([dnl
  837. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  838. #include <crypto_scalarmult_curve25519.h>
  839. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  840. #include <nacl/crypto_scalarmult_curve25519.h>
  841. #endif
  842. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  843. #error Hey, this is the reference implementation! That's not fast.
  844. #endif
  845. ], [
  846. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  847. ])], [tor_cv_can_use_curve25519_nacl=yes],
  848. [tor_cv_can_use_curve25519_nacl=no])
  849. LIBS="$tor_saved_LIBS" ])
  850. dnl Okay, now we need to figure out which one to actually use. Fall back
  851. dnl to curve25519-donna.c
  852. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  853. build_curve25519_donna_c64=yes
  854. use_curve25519_donna=yes
  855. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  856. use_curve25519_nacl=yes
  857. CURVE25519_LIBS=-lnacl
  858. else
  859. build_curve25519_donna=yes
  860. use_curve25519_donna=yes
  861. fi
  862. if test "x$use_curve25519_donna" = "xyes"; then
  863. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  864. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  865. fi
  866. if test "x$use_curve25519_nacl" = "xyes"; then
  867. AC_DEFINE(USE_CURVE25519_NACL, 1,
  868. [Defined if we should use a curve25519 from nacl])
  869. fi
  870. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  871. test "x$build_curve25519_donna" = "xyes")
  872. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  873. test "x$build_curve25519_donna_c64" = "xyes")
  874. AC_SUBST(CURVE25519_LIBS)
  875. dnl Make sure to enable support for large off_t if available.
  876. AC_SYS_LARGEFILE
  877. AC_CHECK_HEADERS([assert.h \
  878. errno.h \
  879. fcntl.h \
  880. signal.h \
  881. string.h \
  882. sys/capability.h \
  883. sys/fcntl.h \
  884. sys/stat.h \
  885. sys/time.h \
  886. sys/types.h \
  887. time.h \
  888. unistd.h \
  889. arpa/inet.h \
  890. crt_externs.h \
  891. execinfo.h \
  892. grp.h \
  893. ifaddrs.h \
  894. inttypes.h \
  895. limits.h \
  896. linux/types.h \
  897. machine/limits.h \
  898. malloc.h \
  899. malloc/malloc.h \
  900. malloc_np.h \
  901. netdb.h \
  902. netinet/in.h \
  903. netinet/in6.h \
  904. pwd.h \
  905. readpassphrase.h \
  906. stdint.h \
  907. sys/eventfd.h \
  908. sys/file.h \
  909. sys/ioctl.h \
  910. sys/limits.h \
  911. sys/mman.h \
  912. sys/param.h \
  913. sys/prctl.h \
  914. sys/random.h \
  915. sys/resource.h \
  916. sys/select.h \
  917. sys/socket.h \
  918. sys/statvfs.h \
  919. sys/syscall.h \
  920. sys/sysctl.h \
  921. sys/syslimits.h \
  922. sys/time.h \
  923. sys/types.h \
  924. sys/un.h \
  925. sys/utime.h \
  926. sys/wait.h \
  927. syslog.h \
  928. utime.h])
  929. AC_CHECK_HEADERS(sys/param.h)
  930. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  931. [#ifdef HAVE_SYS_TYPES_H
  932. #include <sys/types.h>
  933. #endif
  934. #ifdef HAVE_SYS_SOCKET_H
  935. #include <sys/socket.h>
  936. #endif])
  937. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  938. [#ifdef HAVE_SYS_TYPES_H
  939. #include <sys/types.h>
  940. #endif
  941. #ifdef HAVE_SYS_SOCKET_H
  942. #include <sys/socket.h>
  943. #endif
  944. #ifdef HAVE_NET_IF_H
  945. #include <net/if.h>
  946. #endif
  947. #ifdef HAVE_NETINET_IN_H
  948. #include <netinet/in.h>
  949. #endif])
  950. AC_CHECK_HEADERS(linux/if.h,[],[],
  951. [
  952. #ifdef HAVE_SYS_SOCKET_H
  953. #include <sys/socket.h>
  954. #endif
  955. ])
  956. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  957. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  958. [#ifdef HAVE_SYS_TYPES_H
  959. #include <sys/types.h>
  960. #endif
  961. #ifdef HAVE_SYS_SOCKET_H
  962. #include <sys/socket.h>
  963. #endif
  964. #ifdef HAVE_LIMITS_H
  965. #include <limits.h>
  966. #endif
  967. #ifdef HAVE_LINUX_TYPES_H
  968. #include <linux/types.h>
  969. #endif
  970. #ifdef HAVE_NETINET_IN6_H
  971. #include <netinet/in6.h>
  972. #endif
  973. #ifdef HAVE_NETINET_IN_H
  974. #include <netinet/in.h>
  975. #endif])
  976. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  977. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  978. [#ifdef HAVE_SYS_TYPES_H
  979. #include <sys/types.h>
  980. #endif
  981. #ifdef HAVE_SYS_SOCKET_H
  982. #include <sys/socket.h>
  983. #endif
  984. #ifdef HAVE_LIMITS_H
  985. #include <limits.h>
  986. #endif
  987. #ifdef HAVE_LINUX_TYPES_H
  988. #include <linux/types.h>
  989. #endif
  990. #ifdef HAVE_NETINET_IN6_H
  991. #include <netinet/in6.h>
  992. #endif
  993. #ifdef HAVE_NETINET_IN_H
  994. #include <netinet/in.h>
  995. #endif
  996. #ifdef HAVE_LINUX_IF_H
  997. #include <linux/if.h>
  998. #endif])
  999. transparent_ok=0
  1000. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1001. transparent_ok=1
  1002. fi
  1003. if test "x$linux_netfilter_ipv4" = "x1"; then
  1004. transparent_ok=1
  1005. fi
  1006. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1007. transparent_ok=1
  1008. fi
  1009. if test "x$transparent_ok" = "x1"; then
  1010. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1011. else
  1012. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1013. fi
  1014. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1015. [#ifdef HAVE_SYS_TYPES_H
  1016. #include <sys/types.h>
  1017. #endif
  1018. #ifdef HAVE_SYS_TIME_H
  1019. #include <sys/time.h>
  1020. #endif])
  1021. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1022. dnl Watch out.
  1023. AC_CHECK_SIZEOF(int8_t)
  1024. AC_CHECK_SIZEOF(int16_t)
  1025. AC_CHECK_SIZEOF(int32_t)
  1026. AC_CHECK_SIZEOF(int64_t)
  1027. AC_CHECK_SIZEOF(uint8_t)
  1028. AC_CHECK_SIZEOF(uint16_t)
  1029. AC_CHECK_SIZEOF(uint32_t)
  1030. AC_CHECK_SIZEOF(uint64_t)
  1031. AC_CHECK_SIZEOF(intptr_t)
  1032. AC_CHECK_SIZEOF(uintptr_t)
  1033. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1034. AC_CHECK_SIZEOF(char)
  1035. AC_CHECK_SIZEOF(short)
  1036. AC_CHECK_SIZEOF(int)
  1037. AC_CHECK_SIZEOF(long)
  1038. AC_CHECK_SIZEOF(long long)
  1039. AC_CHECK_SIZEOF(__int64)
  1040. AC_CHECK_SIZEOF(void *)
  1041. AC_CHECK_SIZEOF(time_t)
  1042. AC_CHECK_SIZEOF(size_t)
  1043. AC_CHECK_SIZEOF(pid_t)
  1044. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1045. AC_PC_FROM_UCONTEXT([:])
  1046. dnl used to include sockaddr_storage, but everybody has that.
  1047. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1048. [#ifdef HAVE_SYS_TYPES_H
  1049. #include <sys/types.h>
  1050. #endif
  1051. #ifdef HAVE_NETINET_IN_H
  1052. #include <netinet/in.h>
  1053. #endif
  1054. #ifdef HAVE_NETINET_IN6_H
  1055. #include <netinet/in6.h>
  1056. #endif
  1057. #ifdef HAVE_SYS_SOCKET_H
  1058. #include <sys/socket.h>
  1059. #endif
  1060. #ifdef _WIN32
  1061. #define _WIN32_WINNT 0x0501
  1062. #define WIN32_LEAN_AND_MEAN
  1063. #include <winsock2.h>
  1064. #include <ws2tcpip.h>
  1065. #endif
  1066. ])
  1067. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1068. [#ifdef HAVE_SYS_TYPES_H
  1069. #include <sys/types.h>
  1070. #endif
  1071. #ifdef HAVE_NETINET_IN_H
  1072. #include <netinet/in.h>
  1073. #endif
  1074. #ifdef HAVE_NETINET_IN6_H
  1075. #include <netinet/in6.h>
  1076. #endif
  1077. #ifdef HAVE_SYS_SOCKET_H
  1078. #include <sys/socket.h>
  1079. #endif
  1080. #ifdef _WIN32
  1081. #define _WIN32_WINNT 0x0501
  1082. #define WIN32_LEAN_AND_MEAN
  1083. #include <winsock2.h>
  1084. #include <ws2tcpip.h>
  1085. #endif
  1086. ])
  1087. AC_CHECK_TYPES([rlim_t], , ,
  1088. [#ifdef HAVE_SYS_TYPES_H
  1089. #include <sys/types.h>
  1090. #endif
  1091. #ifdef HAVE_SYS_TIME_H
  1092. #include <sys/time.h>
  1093. #endif
  1094. #ifdef HAVE_SYS_RESOURCE_H
  1095. #include <sys/resource.h>
  1096. #endif
  1097. ])
  1098. AX_CHECK_SIGN([time_t],
  1099. [ : ],
  1100. [ : ], [
  1101. #ifdef HAVE_SYS_TYPES_H
  1102. #include <sys/types.h>
  1103. #endif
  1104. #ifdef HAVE_SYS_TIME_H
  1105. #include <sys/time.h>
  1106. #endif
  1107. #ifdef HAVE_TIME_H
  1108. #include <time.h>
  1109. #endif
  1110. ])
  1111. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1112. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1113. fi
  1114. AX_CHECK_SIGN([size_t],
  1115. [ tor_cv_size_t_signed=yes ],
  1116. [ tor_cv_size_t_signed=no ], [
  1117. #ifdef HAVE_SYS_TYPES_H
  1118. #include <sys/types.h>
  1119. #endif
  1120. ])
  1121. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1122. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1123. fi
  1124. AX_CHECK_SIGN([enum always],
  1125. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1126. [ : ], [
  1127. enum always { AAA, BBB, CCC };
  1128. ])
  1129. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1130. #ifdef HAVE_SYS_SOCKET_H
  1131. #include <sys/socket.h>
  1132. #endif
  1133. ])
  1134. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1135. AC_CHECK_SIZEOF(cell_t)
  1136. # Now make sure that NULL can be represented as zero bytes.
  1137. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1138. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1139. [[#include <stdlib.h>
  1140. #include <string.h>
  1141. #include <stdio.h>
  1142. #ifdef HAVE_STDDEF_H
  1143. #include <stddef.h>
  1144. #endif
  1145. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1146. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1147. [tor_cv_null_is_zero=yes],
  1148. [tor_cv_null_is_zero=no],
  1149. [tor_cv_null_is_zero=cross])])
  1150. if test "$tor_cv_null_is_zero" = "cross"; then
  1151. # Cross-compiling; let's hope that the target isn't raving mad.
  1152. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1153. fi
  1154. if test "$tor_cv_null_is_zero" != "no"; then
  1155. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1156. [Define to 1 iff memset(0) sets pointers to NULL])
  1157. fi
  1158. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1159. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1160. [[#include <stdlib.h>
  1161. #include <string.h>
  1162. #include <stdio.h>
  1163. #ifdef HAVE_STDDEF_H
  1164. #include <stddef.h>
  1165. #endif
  1166. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1167. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1168. [tor_cv_dbl0_is_zero=yes],
  1169. [tor_cv_dbl0_is_zero=no],
  1170. [tor_cv_dbl0_is_zero=cross])])
  1171. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1172. # Cross-compiling; let's hope that the target isn't raving mad.
  1173. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1174. fi
  1175. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1176. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1177. [Define to 1 iff memset(0) sets doubles to 0.0])
  1178. fi
  1179. # And what happens when we malloc zero?
  1180. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1181. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1182. [[#include <stdlib.h>
  1183. #include <string.h>
  1184. #include <stdio.h>
  1185. #ifdef HAVE_STDDEF_H
  1186. #include <stddef.h>
  1187. #endif
  1188. int main () { return malloc(0)?0:1; }]])],
  1189. [tor_cv_malloc_zero_works=yes],
  1190. [tor_cv_malloc_zero_works=no],
  1191. [tor_cv_malloc_zero_works=cross])])
  1192. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1193. # Cross-compiling; let's hope that the target isn't raving mad.
  1194. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1195. fi
  1196. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1197. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1198. [Define to 1 iff malloc(0) returns a pointer])
  1199. fi
  1200. # whether we seem to be in a 2s-complement world.
  1201. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1202. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1203. [[int main () { int problem = ((-99) != (~99)+1);
  1204. return problem ? 1 : 0; }]])],
  1205. [tor_cv_twos_complement=yes],
  1206. [tor_cv_twos_complement=no],
  1207. [tor_cv_twos_complement=cross])])
  1208. if test "$tor_cv_twos_complement" = "cross"; then
  1209. # Cross-compiling; let's hope that the target isn't raving mad.
  1210. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1211. fi
  1212. if test "$tor_cv_twos_complement" != "no"; then
  1213. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1214. [Define to 1 iff we represent negative integers with
  1215. two's complement])
  1216. fi
  1217. # What does shifting a negative value do?
  1218. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1219. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1220. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1221. [tor_cv_sign_extend=yes],
  1222. [tor_cv_sign_extend=no],
  1223. [tor_cv_sign_extend=cross])])
  1224. if test "$tor_cv_sign_extend" = "cross"; then
  1225. # Cross-compiling; let's hope that the target isn't raving mad.
  1226. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1227. fi
  1228. if test "$tor_cv_sign_extend" != "no"; then
  1229. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1230. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1231. fi
  1232. # Whether we should use the dmalloc memory allocation debugging library.
  1233. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1234. AC_ARG_WITH(dmalloc,
  1235. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1236. [if [[ "$withval" = "yes" ]]; then
  1237. dmalloc=1
  1238. AC_MSG_RESULT(yes)
  1239. else
  1240. dmalloc=1
  1241. AC_MSG_RESULT(no)
  1242. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1243. )
  1244. if [[ $dmalloc -eq 1 ]]; then
  1245. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1246. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1247. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1248. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1249. fi
  1250. AC_ARG_WITH(tcmalloc,
  1251. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1252. [ tcmalloc=yes ], [ tcmalloc=no ])
  1253. if test "x$tcmalloc" = "xyes"; then
  1254. LDFLAGS="-ltcmalloc $LDFLAGS"
  1255. fi
  1256. using_custom_malloc=no
  1257. if test "x$enable_openbsd_malloc" = "xyes"; then
  1258. using_custom_malloc=yes
  1259. fi
  1260. if test "x$tcmalloc" = "xyes"; then
  1261. using_custom_malloc=yes
  1262. fi
  1263. if test "$using_custom_malloc" = "no"; then
  1264. AC_CHECK_FUNCS(mallinfo)
  1265. fi
  1266. # By default, we're going to assume we don't have mlockall()
  1267. # bionic and other platforms have various broken mlockall subsystems.
  1268. # Some systems don't have a working mlockall, some aren't linkable,
  1269. # and some have it but don't declare it.
  1270. AC_CHECK_FUNCS(mlockall)
  1271. AC_CHECK_DECLS([mlockall], , , [
  1272. #ifdef HAVE_SYS_MMAN_H
  1273. #include <sys/mman.h>
  1274. #endif])
  1275. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1276. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1277. # using macros
  1278. AC_CHECK_DECLS([getpagesize], , , [
  1279. #ifdef HAVE_UNISTD_H
  1280. #include <unistd.h>
  1281. #endif])
  1282. # Allow user to specify an alternate syslog facility
  1283. AC_ARG_WITH(syslog-facility,
  1284. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1285. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1286. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1287. AC_SUBST(LOGFACILITY)
  1288. # Check if we have getresuid and getresgid
  1289. AC_CHECK_FUNCS(getresuid getresgid)
  1290. # Check for gethostbyname_r in all its glorious incompatible versions.
  1291. # (This logic is based on that in Python's configure.in)
  1292. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1293. [Define this if you have any gethostbyname_r()])
  1294. AC_CHECK_FUNC(gethostbyname_r, [
  1295. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1296. OLD_CFLAGS=$CFLAGS
  1297. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1298. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1299. #include <netdb.h>
  1300. ]], [[
  1301. char *cp1, *cp2;
  1302. struct hostent *h1, *h2;
  1303. int i1, i2;
  1304. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1305. ]])],[
  1306. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1307. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1308. [Define this if gethostbyname_r takes 6 arguments])
  1309. AC_MSG_RESULT(6)
  1310. ], [
  1311. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1312. #include <netdb.h>
  1313. ]], [[
  1314. char *cp1, *cp2;
  1315. struct hostent *h1;
  1316. int i1, i2;
  1317. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1318. ]])], [
  1319. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1320. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1321. [Define this if gethostbyname_r takes 5 arguments])
  1322. AC_MSG_RESULT(5)
  1323. ], [
  1324. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1325. #include <netdb.h>
  1326. ]], [[
  1327. char *cp1;
  1328. struct hostent *h1;
  1329. struct hostent_data hd;
  1330. (void) gethostbyname_r(cp1,h1,&hd);
  1331. ]])], [
  1332. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1333. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1334. [Define this if gethostbyname_r takes 3 arguments])
  1335. AC_MSG_RESULT(3)
  1336. ], [
  1337. AC_MSG_RESULT(0)
  1338. ])
  1339. ])
  1340. ])
  1341. CFLAGS=$OLD_CFLAGS
  1342. ])
  1343. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1344. tor_cv_have_func_macro,
  1345. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1346. #include <stdio.h>
  1347. int main(int c, char **v) { puts(__func__); }])],
  1348. tor_cv_have_func_macro=yes,
  1349. tor_cv_have_func_macro=no))
  1350. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1351. tor_cv_have_FUNC_macro,
  1352. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1353. #include <stdio.h>
  1354. int main(int c, char **v) { puts(__FUNC__); }])],
  1355. tor_cv_have_FUNC_macro=yes,
  1356. tor_cv_have_FUNC_macro=no))
  1357. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1358. tor_cv_have_FUNCTION_macro,
  1359. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1360. #include <stdio.h>
  1361. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1362. tor_cv_have_FUNCTION_macro=yes,
  1363. tor_cv_have_FUNCTION_macro=no))
  1364. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1365. tor_cv_have_environ_declared,
  1366. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1367. #ifdef HAVE_UNISTD_H
  1368. #include <unistd.h>
  1369. #endif
  1370. #include <stdlib.h>
  1371. int main(int c, char **v) { char **t = environ; }])],
  1372. tor_cv_have_environ_declared=yes,
  1373. tor_cv_have_environ_declared=no))
  1374. if test "$tor_cv_have_func_macro" = "yes"; then
  1375. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1376. fi
  1377. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1378. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1379. fi
  1380. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1381. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1382. [Defined if the compiler supports __FUNCTION__])
  1383. fi
  1384. if test "$tor_cv_have_environ_declared" = "yes"; then
  1385. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1386. [Defined if we have extern char **environ already declared])
  1387. fi
  1388. # $prefix stores the value of the --prefix command line option, or
  1389. # NONE if the option wasn't set. In the case that it wasn't set, make
  1390. # it be the default, so that we can use it to expand directories now.
  1391. if test "x$prefix" = "xNONE"; then
  1392. prefix=$ac_default_prefix
  1393. fi
  1394. # and similarly for $exec_prefix
  1395. if test "x$exec_prefix" = "xNONE"; then
  1396. exec_prefix=$prefix
  1397. fi
  1398. if test "x$BUILDDIR" = "x"; then
  1399. BUILDDIR=`pwd`
  1400. fi
  1401. AC_SUBST(BUILDDIR)
  1402. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1403. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1404. if test "x$CONFDIR" = "x"; then
  1405. CONFDIR=`eval echo $sysconfdir/tor`
  1406. fi
  1407. AC_SUBST(CONFDIR)
  1408. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1409. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1410. BINDIR=`eval echo $bindir`
  1411. AC_SUBST(BINDIR)
  1412. LOCALSTATEDIR=`eval echo $localstatedir`
  1413. AC_SUBST(LOCALSTATEDIR)
  1414. if test "$bwin32" = "true"; then
  1415. # Test if the linker supports the --nxcompat and --dynamicbase options
  1416. # for Windows
  1417. save_LDFLAGS="$LDFLAGS"
  1418. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1419. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1420. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1421. [AC_MSG_RESULT([yes])]
  1422. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1423. [AC_MSG_RESULT([no])]
  1424. )
  1425. LDFLAGS="$save_LDFLAGS"
  1426. fi
  1427. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1428. # than autoconf's macros like.
  1429. if test "$GCC" = "yes"; then
  1430. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1431. # accident waiting to happen.
  1432. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1433. else
  1434. # Override optimization level for non-gcc compilers
  1435. CFLAGS="$CFLAGS -O"
  1436. enable_gcc_warnings=no
  1437. enable_gcc_warnings_advisory=no
  1438. fi
  1439. # Warnings implies advisory-warnings and -Werror.
  1440. if test "$enable_gcc_warnings" = "yes"; then
  1441. enable_gcc_warnings_advisory=yes
  1442. enable_fatal_warnings=yes
  1443. fi
  1444. # OS X Lion started deprecating the system openssl. Let's just disable
  1445. # all deprecation warnings on OS X. Also, to potentially make the binary
  1446. # a little smaller, let's enable dead_strip.
  1447. case "$host_os" in
  1448. darwin*)
  1449. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1450. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1451. esac
  1452. # Add some more warnings which we use in development but not in the
  1453. # released versions. (Some relevant gcc versions can't handle these.)
  1454. #
  1455. # Note that we have to do this near the end of the autoconf process, or
  1456. # else we may run into problems when these warnings hit on the testing C
  1457. # programs that autoconf wants to build.
  1458. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1459. case "$host" in
  1460. *-*-openbsd* | *-*-bitrig*)
  1461. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1462. # That's fine, except that the headers don't pass -Wredundant-decls.
  1463. # Therefore, let's disable -Wsystem-headers when we're building
  1464. # with maximal warnings on OpenBSD.
  1465. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1466. esac
  1467. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1468. # have it work better.
  1469. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1470. # This warning was added in gcc 4.3, but it appears to generate
  1471. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1472. #CFLAGS="$CFLAGS -Wlogical-op"
  1473. m4_foreach_w([warning_flag], [
  1474. -Waddress
  1475. -Waddress-of-array-temporary
  1476. -Waddress-of-temporary
  1477. -Wambiguous-macro
  1478. -Wanonymous-pack-parens
  1479. -Warc
  1480. -Warc-abi
  1481. -Warc-bridge-casts-disallowed-in-nonarc
  1482. -Warc-maybe-repeated-use-of-weak
  1483. -Warc-performSelector-leaks
  1484. -Warc-repeated-use-of-weak
  1485. -Warray-bounds
  1486. -Warray-bounds-pointer-arithmetic
  1487. -Wasm
  1488. -Wasm-operand-widths
  1489. -Watomic-properties
  1490. -Watomic-property-with-user-defined-accessor
  1491. -Wauto-import
  1492. -Wauto-storage-class
  1493. -Wauto-var-id
  1494. -Wavailability
  1495. -Wbackslash-newline-escape
  1496. -Wbad-array-new-length
  1497. -Wbind-to-temporary-copy
  1498. -Wbitfield-constant-conversion
  1499. -Wbool-conversion
  1500. -Wbool-conversions
  1501. -Wbuiltin-requires-header
  1502. -Wchar-align
  1503. -Wcompare-distinct-pointer-types
  1504. -Wcomplex-component-init
  1505. -Wconditional-type-mismatch
  1506. -Wconfig-macros
  1507. -Wconstant-conversion
  1508. -Wconstant-logical-operand
  1509. -Wconstexpr-not-const
  1510. -Wcustom-atomic-properties
  1511. -Wdangling-field
  1512. -Wdangling-initializer-list
  1513. -Wdate-time
  1514. -Wdelegating-ctor-cycles
  1515. -Wdeprecated-implementations
  1516. -Wdeprecated-register
  1517. -Wdirect-ivar-access
  1518. -Wdiscard-qual
  1519. -Wdistributed-object-modifiers
  1520. -Wdivision-by-zero
  1521. -Wdollar-in-identifier-extension
  1522. -Wdouble-promotion
  1523. -Wduplicate-decl-specifier
  1524. -Wduplicate-enum
  1525. -Wduplicate-method-arg
  1526. -Wduplicate-method-match
  1527. -Wduplicated-cond
  1528. -Wdynamic-class-memaccess
  1529. -Wembedded-directive
  1530. -Wempty-translation-unit
  1531. -Wenum-conversion
  1532. -Wexit-time-destructors
  1533. -Wexplicit-ownership-type
  1534. -Wextern-initializer
  1535. -Wextra
  1536. -Wextra-semi
  1537. -Wextra-tokens
  1538. -Wflexible-array-extensions
  1539. -Wfloat-conversion
  1540. -Wformat-non-iso
  1541. -Wfour-char-constants
  1542. -Wgcc-compat
  1543. -Wglobal-constructors
  1544. -Wgnu-array-member-paren-init
  1545. -Wgnu-designator
  1546. -Wgnu-static-float-init
  1547. -Wheader-guard
  1548. -Wheader-hygiene
  1549. -Widiomatic-parentheses
  1550. -Wignored-attributes
  1551. -Wimplicit-atomic-properties
  1552. -Wimplicit-conversion-floating-point-to-bool
  1553. -Wimplicit-exception-spec-mismatch
  1554. -Wimplicit-fallthrough
  1555. -Wimplicit-fallthrough-per-function
  1556. -Wimplicit-retain-self
  1557. -Wimport-preprocessor-directive-pedantic
  1558. -Wincompatible-library-redeclaration
  1559. -Wincompatible-pointer-types-discards-qualifiers
  1560. -Wincomplete-implementation
  1561. -Wincomplete-module
  1562. -Wincomplete-umbrella
  1563. -Winit-self
  1564. -Wint-conversions
  1565. -Wint-to-void-pointer-cast
  1566. -Winteger-overflow
  1567. -Winvalid-constexpr
  1568. -Winvalid-iboutlet
  1569. -Winvalid-noreturn
  1570. -Winvalid-pp-token
  1571. -Winvalid-source-encoding
  1572. -Winvalid-token-paste
  1573. -Wknr-promoted-parameter
  1574. -Wlanguage-extension-token
  1575. -Wlarge-by-value-copy
  1576. -Wliteral-conversion
  1577. -Wliteral-range
  1578. -Wlocal-type-template-args
  1579. -Wlogical-op
  1580. -Wloop-analysis
  1581. -Wmain-return-type
  1582. -Wmalformed-warning-check
  1583. -Wmethod-signatures
  1584. -Wmicrosoft
  1585. -Wmicrosoft-exists
  1586. -Wmismatched-parameter-types
  1587. -Wmismatched-return-types
  1588. -Wmissing-field-initializers
  1589. -Wmissing-format-attribute
  1590. -Wmissing-noreturn
  1591. -Wmissing-selector-name
  1592. -Wmissing-sysroot
  1593. -Wmissing-variable-declarations
  1594. -Wmodule-conflict
  1595. -Wnested-anon-types
  1596. -Wnewline-eof
  1597. -Wnon-literal-null-conversion
  1598. -Wnon-pod-varargs
  1599. -Wnonportable-cfstrings
  1600. -Wnormalized=id
  1601. -Wnull-arithmetic
  1602. -Wnull-character
  1603. -Wnull-conversion
  1604. -Wnull-dereference
  1605. -Wout-of-line-declaration
  1606. -Wover-aligned
  1607. -Woverlength-strings
  1608. -Woverride-init
  1609. -Woverriding-method-mismatch
  1610. -Wpointer-type-mismatch
  1611. -Wpredefined-identifier-outside-function
  1612. -Wprotocol-property-synthesis-ambiguity
  1613. -Wreadonly-iboutlet-property
  1614. -Wreadonly-setter-attrs
  1615. -Wreceiver-expr
  1616. -Wreceiver-forward-class
  1617. -Wreceiver-is-weak
  1618. -Wreinterpret-base-class
  1619. -Wrequires-super-attribute
  1620. -Wreserved-user-defined-literal
  1621. -Wreturn-stack-address
  1622. -Wsection
  1623. -Wselector-type-mismatch
  1624. -Wsentinel
  1625. -Wserialized-diagnostics
  1626. -Wshadow
  1627. -Wshift-count-negative
  1628. -Wshift-count-overflow
  1629. -Wshift-negative-value
  1630. -Wshift-overflow=2
  1631. -Wshift-sign-overflow
  1632. -Wshorten-64-to-32
  1633. -Wsizeof-array-argument
  1634. -Wsource-uses-openmp
  1635. -Wstatic-float-init
  1636. -Wstatic-in-inline
  1637. -Wstatic-local-in-inline
  1638. -Wstrict-overflow=1
  1639. -Wstring-compare
  1640. -Wstring-conversion
  1641. -Wstrlcpy-strlcat-size
  1642. -Wstrncat-size
  1643. -Wsuggest-attribute=format
  1644. -Wsuggest-attribute=noreturn
  1645. -Wsuper-class-method-mismatch
  1646. -Wswitch-bool
  1647. -Wsync-nand
  1648. -Wtautological-constant-out-of-range-compare
  1649. -Wtentative-definition-incomplete-type
  1650. -Wtrampolines
  1651. -Wtype-safety
  1652. -Wtypedef-redefinition
  1653. -Wtypename-missing
  1654. -Wundefined-inline
  1655. -Wundefined-internal
  1656. -Wundefined-reinterpret-cast
  1657. -Wunicode
  1658. -Wunicode-whitespace
  1659. -Wunknown-warning-option
  1660. -Wunnamed-type-template-args
  1661. -Wunneeded-member-function
  1662. -Wunsequenced
  1663. -Wunsupported-visibility
  1664. -Wunused-but-set-parameter
  1665. -Wunused-but-set-variable
  1666. -Wunused-command-line-argument
  1667. -Wunused-const-variable=2
  1668. -Wunused-exception-parameter
  1669. -Wunused-local-typedefs
  1670. -Wunused-member-function
  1671. -Wunused-sanitize-argument
  1672. -Wunused-volatile-lvalue
  1673. -Wuser-defined-literals
  1674. -Wvariadic-macros
  1675. -Wvector-conversion
  1676. -Wvector-conversions
  1677. -Wvexing-parse
  1678. -Wvisibility
  1679. -Wvla-extension
  1680. -Wzero-length-array
  1681. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1682. dnl We should re-enable this in some later version. Clang doesn't
  1683. dnl mind, but it causes trouble with GCC.
  1684. dnl -Wstrict-overflow=2
  1685. dnl These seem to require annotations that we don't currently use,
  1686. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1687. dnl -Wthread-safety
  1688. dnl -Wthread-safety-analysis
  1689. dnl -Wthread-safety-attributes
  1690. dnl -Wthread-safety-beta
  1691. dnl -Wthread-safety-precise
  1692. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1693. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1694. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1695. CFLAGS="$CFLAGS -Wwrite-strings"
  1696. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1697. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1698. CFLAGS="$CFLAGS -Wunused-parameter "
  1699. # These interfere with building main() { return 0; }, which autoconf
  1700. # likes to use as its default program.
  1701. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1702. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1703. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1704. fi
  1705. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1706. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1707. fi
  1708. if test "x$enable_fatal_warnings" = "xyes"; then
  1709. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1710. # default autoconf programs are full of errors.
  1711. CFLAGS="$CFLAGS -Werror"
  1712. fi
  1713. fi
  1714. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1715. case "$host_os" in
  1716. darwin*)
  1717. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1718. esac
  1719. fi
  1720. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1721. AC_CONFIG_FILES([
  1722. Doxyfile
  1723. Makefile
  1724. contrib/dist/suse/tor.sh
  1725. contrib/operator-tools/tor.logrotate
  1726. contrib/dist/tor.sh
  1727. contrib/dist/torctl
  1728. contrib/dist/tor.service
  1729. src/config/torrc.sample
  1730. src/config/torrc.minimal
  1731. scripts/maint/checkOptionDocs.pl
  1732. scripts/maint/updateVersions.pl
  1733. ])
  1734. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1735. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1736. for file in $regular_mans ; do
  1737. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1738. echo "==================================";
  1739. echo;
  1740. echo "Building Tor has failed since manpages cannot be built.";
  1741. echo;
  1742. echo "You need asciidoc installed to be able to build the manpages.";
  1743. echo "To build without manpages, use the --disable-asciidoc argument";
  1744. echo "when calling configure.";
  1745. echo;
  1746. echo "==================================";
  1747. exit 1;
  1748. fi
  1749. done
  1750. fi
  1751. if test "$fragile_hardening" = "yes"; then
  1752. AC_MSG_WARN([
  1753. ============
  1754. Warning! Building Tor with --enable-fragile-hardening (also known as
  1755. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  1756. other kinds of attacks easier. A Tor instance build with this option will be
  1757. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  1758. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  1759. denial of service attacks. For more information, see
  1760. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  1761. ============
  1762. ])
  1763. fi
  1764. AC_OUTPUT