configure.ac 52 KB

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  1. dnl Copyright (c) 2001-2004, Roger Dingledine
  2. dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
  3. dnl Copyright (c) 2007-2015, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_INIT([tor],[0.2.7.0-alpha-dev])
  6. AC_CONFIG_SRCDIR([src/or/main.c])
  7. AC_CONFIG_MACRO_DIR([m4])
  8. AM_INIT_AUTOMAKE
  9. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  10. AC_CONFIG_HEADERS([orconfig.h])
  11. AC_CANONICAL_HOST
  12. PKG_PROG_PKG_CONFIG
  13. if test -f /etc/redhat-release ; then
  14. if test -f /usr/kerberos/include ; then
  15. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  16. fi
  17. fi
  18. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  19. # the += operator on it in src/or/Makefile.am
  20. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  21. #XXXX020 We should make these enabled or not, before 0.2.0.x-final
  22. AC_ARG_ENABLE(openbsd-malloc,
  23. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  24. AC_ARG_ENABLE(instrument-downloads,
  25. AS_HELP_STRING(--enable-instrument-downloads, [instrument downloads of directory resources etc.]))
  26. AC_ARG_ENABLE(static-openssl,
  27. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  28. AC_ARG_ENABLE(static-libevent,
  29. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  30. AC_ARG_ENABLE(static-zlib,
  31. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  32. AC_ARG_ENABLE(static-tor,
  33. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  34. AC_ARG_ENABLE(unittests,
  35. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  36. AC_ARG_ENABLE(coverage,
  37. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  38. AC_ARG_ENABLE(system-torrc,
  39. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  40. AM_CONDITIONAL(UNITTESTS_ENABLED, test x$enable_unittests != xno)
  41. AM_CONDITIONAL(COVERAGE_ENABLED, test x$enable_coverage = xyes)
  42. if test "$enable_static_tor" = "yes"; then
  43. enable_static_libevent="yes";
  44. enable_static_openssl="yes";
  45. enable_static_zlib="yes";
  46. CFLAGS="$CFLAGS -static"
  47. fi
  48. if test "$enable_system_torrc" = "no"; then
  49. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  50. [Defined if we're not going to look for a torrc in SYSCONF])
  51. fi
  52. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test x$enable_openbsd_malloc = xyes)
  53. if test x$enable_instrument_downloads = xyes; then
  54. AC_DEFINE(INSTRUMENT_DOWNLOADS, 1,
  55. [Defined if we want to keep track of how much of each kind of resource we download.])
  56. fi
  57. AC_ARG_ENABLE(transparent,
  58. AS_HELP_STRING(--disable-transparent, [disable transparent proxy support]),
  59. [case "${enableval}" in
  60. yes) transparent=true ;;
  61. no) transparent=false ;;
  62. *) AC_MSG_ERROR(bad value for --enable-transparent) ;;
  63. esac], [transparent=true])
  64. AC_ARG_ENABLE(asciidoc,
  65. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  66. [case "${enableval}" in
  67. yes) asciidoc=true ;;
  68. no) asciidoc=false ;;
  69. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  70. esac], [asciidoc=true])
  71. # By default, we're not ready to ship a NAT-PMP aware Tor
  72. AC_ARG_ENABLE(nat-pmp,
  73. AS_HELP_STRING(--enable-nat-pmp, [enable NAT-PMP support]),
  74. [case "${enableval}" in
  75. yes) natpmp=true ;;
  76. no) natpmp=false ;;
  77. * ) AC_MSG_ERROR(bad value for --enable-nat-pmp) ;;
  78. esac], [natpmp=false])
  79. # By default, we're not ready to ship a UPnP aware Tor
  80. AC_ARG_ENABLE(upnp,
  81. AS_HELP_STRING(--enable-upnp, [enable UPnP support]),
  82. [case "${enableval}" in
  83. yes) upnp=true ;;
  84. no) upnp=false ;;
  85. * ) AC_MSG_ERROR(bad value for --enable-upnp) ;;
  86. esac], [upnp=false])
  87. # systemd notify support
  88. AC_ARG_ENABLE(systemd,
  89. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  90. [case "${enableval}" in
  91. yes) systemd=true ;;
  92. no) systemd=false ;;
  93. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  94. esac], [systemd=auto])
  95. # systemd support
  96. if test x$enable_systemd = xno ; then
  97. have_systemd=no;
  98. else
  99. PKG_CHECK_MODULES(SYSTEMD,
  100. [libsystemd-daemon],
  101. have_systemd=yes,
  102. have_systemd=no)
  103. if test x$have_systemd=xno; then
  104. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  105. PKG_CHECK_MODULES(SYSTEMD,
  106. [libsystemd],
  107. have_systemd=yes,
  108. have_systemd=no)
  109. fi
  110. fi
  111. if test x$have_systemd = xyes; then
  112. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  113. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  114. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  115. PKG_CHECK_MODULES(SYSTEMD209, [systemd >= 209],
  116. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  117. fi
  118. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  119. AC_SUBST(TOR_SYSTEMD_LIBS)
  120. if test x$enable_systemd = xyes -a x$have_systemd != xyes ; then
  121. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  122. fi
  123. case $host in
  124. *-*-solaris* )
  125. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  126. ;;
  127. esac
  128. AC_ARG_ENABLE(gcc-warnings,
  129. AS_HELP_STRING(--enable-gcc-warnings, [enable verbose warnings]))
  130. AC_ARG_ENABLE(gcc-warnings-advisory,
  131. AS_HELP_STRING(--enable-gcc-warnings-advisory, [enable verbose warnings, excluding -Werror]))
  132. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  133. AC_ARG_ENABLE(gcc-hardening,
  134. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  135. AC_ARG_ENABLE(expensive-hardening,
  136. AS_HELP_STRING(--enable-expensive-hardening, [enable more expensive compiler hardening; makes Tor slower]))
  137. dnl Linker hardening options
  138. dnl Currently these options are ELF specific - you can't use this with MacOSX
  139. AC_ARG_ENABLE(linker-hardening,
  140. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  141. AC_ARG_ENABLE(local-appdata,
  142. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  143. if test "$enable_local_appdata" = "yes"; then
  144. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  145. [Defined if we default to host local appdata paths on Windows])
  146. fi
  147. # Tor2web mode flag
  148. AC_ARG_ENABLE(tor2web-mode,
  149. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  150. [if test x$enableval = xyes; then
  151. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  152. fi])
  153. AC_ARG_ENABLE(bufferevents,
  154. AS_HELP_STRING(--enable-bufferevents, [use Libevent's buffered IO]))
  155. AC_ARG_ENABLE(tool-name-check,
  156. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  157. AC_ARG_ENABLE(seccomp,
  158. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  159. AC_ARG_ENABLE(libscrypt,
  160. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  161. dnl check for the correct "ar" when cross-compiling
  162. AN_MAKEVAR([AR], [AC_PROG_AR])
  163. AN_PROGRAM([ar], [AC_PROG_AR])
  164. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [ar])])
  165. AC_PROG_AR
  166. dnl Check whether the above macro has settled for a simply named tool even
  167. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  168. dnl because that will find any cc on the system, not only the cross-compiler,
  169. dnl and then verify that a binary built with this compiler runs on the
  170. dnl build system. It will then come to the false conclusion that we're not
  171. dnl cross-compiling.
  172. if test x$enable_tool_name_check != xno; then
  173. if test x$ac_tool_warned = xyes; then
  174. 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.)])
  175. elif test "x$ac_ct_AR" != x -a x$cross_compiling = xmaybe; then
  176. 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.)])
  177. fi
  178. fi
  179. AC_PROG_CC
  180. AC_PROG_CPP
  181. AC_PROG_MAKE_SET
  182. AC_PROG_RANLIB
  183. AC_PATH_PROG([PERL], [perl])
  184. dnl autoconf 2.59 appears not to support AC_PROG_SED
  185. AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
  186. dnl check for asciidoc and a2x
  187. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  188. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  189. AM_CONDITIONAL(USE_ASCIIDOC, test x$asciidoc = xtrue)
  190. AM_CONDITIONAL(USE_FW_HELPER, test x$natpmp = xtrue || test x$upnp = xtrue)
  191. AM_CONDITIONAL(NAT_PMP, test x$natpmp = xtrue)
  192. AM_CONDITIONAL(MINIUPNPC, test x$upnp = xtrue)
  193. AM_PROG_CC_C_O
  194. AC_PROG_CC_C99
  195. AC_ARG_VAR([PYTHON], [path to Python binary])
  196. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  197. if test "x$PYTHON" = "x"; then
  198. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  199. fi
  200. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  201. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  202. AC_C_FLEXIBLE_ARRAY_MEMBER
  203. ], [
  204. dnl Maybe we've got an old autoconf...
  205. AC_CACHE_CHECK([for flexible array members],
  206. tor_cv_c_flexarray,
  207. [AC_COMPILE_IFELSE(
  208. AC_LANG_PROGRAM([
  209. struct abc { int a; char b[]; };
  210. ], [
  211. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  212. def->b[0] = 33;
  213. ]),
  214. [tor_cv_c_flexarray=yes],
  215. [tor_cv_c_flexarray=no])])
  216. if test $tor_cv_flexarray = yes ; then
  217. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  218. else
  219. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  220. fi
  221. ])
  222. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  223. tor_cv_c_c99_decl,
  224. [AC_COMPILE_IFELSE(
  225. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  226. [tor_cv_c_c99_decl=yes],
  227. [tor_cv_c_c99_decl=no] )])
  228. if test "$tor_cv_c_c99_decl" != "yes"; then
  229. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  230. fi
  231. AC_CACHE_CHECK([for working C99 designated initializers],
  232. tor_cv_c_c99_designated_init,
  233. [AC_COMPILE_IFELSE(
  234. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  235. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  236. [tor_cv_c_c99_designated_init=yes],
  237. [tor_cv_c_c99_designated_init=no] )])
  238. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  239. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  240. fi
  241. TORUSER=_tor
  242. AC_ARG_WITH(tor-user,
  243. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  244. [
  245. TORUSER=$withval
  246. ]
  247. )
  248. AC_SUBST(TORUSER)
  249. TORGROUP=_tor
  250. AC_ARG_WITH(tor-group,
  251. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  252. [
  253. TORGROUP=$withval
  254. ]
  255. )
  256. AC_SUBST(TORGROUP)
  257. dnl If _WIN32 is defined and non-zero, we are building for win32
  258. AC_MSG_CHECKING([for win32])
  259. AC_RUN_IFELSE([AC_LANG_SOURCE([
  260. int main(int c, char **v) {
  261. #ifdef _WIN32
  262. #if _WIN32
  263. return 0;
  264. #else
  265. return 1;
  266. #endif
  267. #else
  268. return 2;
  269. #endif
  270. }])],
  271. bwin32=true; AC_MSG_RESULT([yes]),
  272. bwin32=false; AC_MSG_RESULT([no]),
  273. bwin32=cross; AC_MSG_RESULT([cross])
  274. )
  275. if test "$bwin32" = cross; then
  276. AC_MSG_CHECKING([for win32 (cross)])
  277. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  278. #ifdef _WIN32
  279. int main(int c, char **v) {return 0;}
  280. #else
  281. #error
  282. int main(int c, char **v) {return x(y);}
  283. #endif
  284. ])],
  285. bwin32=true; AC_MSG_RESULT([yes]),
  286. bwin32=false; AC_MSG_RESULT([no]))
  287. fi
  288. AM_CONDITIONAL(BUILD_NT_SERVICES, test x$bwin32 = xtrue)
  289. dnl Enable C99 when compiling with MIPSpro
  290. AC_MSG_CHECKING([for MIPSpro compiler])
  291. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  292. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  293. #error
  294. return x(y);
  295. #endif
  296. ])],
  297. bmipspro=false; AC_MSG_RESULT(no),
  298. bmipspro=true; AC_MSG_RESULT(yes))
  299. if test "$bmipspro" = true; then
  300. CFLAGS="$CFLAGS -c99"
  301. fi
  302. AC_C_BIGENDIAN
  303. AC_SEARCH_LIBS(socket, [socket network])
  304. AC_SEARCH_LIBS(gethostbyname, [nsl])
  305. AC_SEARCH_LIBS(dlopen, [dl])
  306. AC_SEARCH_LIBS(inet_aton, [resolv])
  307. saved_LIBS="$LIBS"
  308. AC_SEARCH_LIBS([clock_gettime], [rt])
  309. if test "$LIBS" != "$saved_LIBS"; then
  310. # Looks like we need -lrt for clock_gettime().
  311. have_rt=yes
  312. fi
  313. AC_SEARCH_LIBS(pthread_create, [pthread])
  314. AC_SEARCH_LIBS(pthread_detach, [pthread])
  315. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  316. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  317. dnl -------------------------------------------------------------------
  318. dnl Check for functions before libevent, since libevent-1.2 apparently
  319. dnl exports strlcpy without defining it in a header.
  320. AC_CHECK_FUNCS(
  321. _NSGetEnviron \
  322. accept4 \
  323. backtrace \
  324. backtrace_symbols_fd \
  325. clock_gettime \
  326. eventfd \
  327. flock \
  328. ftime \
  329. getaddrinfo \
  330. getifaddrs \
  331. getrlimit \
  332. gettimeofday \
  333. gmtime_r \
  334. inet_aton \
  335. ioctl \
  336. issetugid \
  337. llround \
  338. localtime_r \
  339. lround \
  340. memmem \
  341. pipe \
  342. pipe2 \
  343. prctl \
  344. rint \
  345. sigaction \
  346. socketpair \
  347. strlcat \
  348. strlcpy \
  349. strnlen \
  350. strptime \
  351. strtok_r \
  352. strtoull \
  353. sysconf \
  354. sysctl \
  355. uname \
  356. usleep \
  357. vasprintf \
  358. _vscprintf
  359. )
  360. if test "$bwin32" != true; then
  361. AC_CHECK_HEADERS(pthread.h)
  362. AC_CHECK_FUNCS(pthread_create)
  363. fi
  364. dnl ------------------------------------------------------
  365. dnl Where do you live, libevent? And how do we call you?
  366. if test "$bwin32" = true; then
  367. TOR_LIB_WS32=-lws2_32
  368. TOR_LIB_IPHLPAPI=-liphlpapi
  369. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  370. # think it's actually necessary.
  371. TOR_LIB_GDI=-lgdi32
  372. else
  373. TOR_LIB_WS32=
  374. TOR_LIB_GDI=
  375. fi
  376. AC_SUBST(TOR_LIB_WS32)
  377. AC_SUBST(TOR_LIB_GDI)
  378. AC_SUBST(TOR_LIB_IPHLPAPI)
  379. dnl We need to do this before we try our disgusting hack below.
  380. AC_CHECK_HEADERS([sys/types.h])
  381. dnl This is a disgusting hack so we safely include older libevent headers.
  382. AC_CHECK_TYPE(u_int64_t, unsigned long long)
  383. AC_CHECK_TYPE(u_int32_t, unsigned long)
  384. AC_CHECK_TYPE(u_int16_t, unsigned short)
  385. AC_CHECK_TYPE(u_int8_t, unsigned char)
  386. tor_libevent_pkg_redhat="libevent"
  387. tor_libevent_pkg_debian="libevent-dev"
  388. tor_libevent_devpkg_redhat="libevent-devel"
  389. tor_libevent_devpkg_debian="libevent-dev"
  390. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  391. dnl linking for static builds.
  392. STATIC_LIBEVENT_FLAGS=""
  393. if test "$enable_static_libevent" = "yes"; then
  394. if test "$have_rt" = yes; then
  395. STATIC_LIBEVENT_FLAGS=" -lrt "
  396. fi
  397. fi
  398. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  399. #ifdef _WIN32
  400. #include <winsock2.h>
  401. #endif
  402. #include <stdlib.h>
  403. #include <sys/time.h>
  404. #include <sys/types.h>
  405. #include <event.h>], [
  406. #ifdef _WIN32
  407. #include <winsock2.h>
  408. #endif
  409. void exit(int); void *event_init(void);],
  410. [
  411. #ifdef _WIN32
  412. {WSADATA d; WSAStartup(0x101,&d); }
  413. #endif
  414. event_init(); exit(0);
  415. ], [--with-libevent-dir], [/opt/libevent])
  416. dnl Now check for particular libevent functions.
  417. save_LIBS="$LIBS"
  418. save_LDFLAGS="$LDFLAGS"
  419. save_CPPFLAGS="$CPPFLAGS"
  420. LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
  421. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  422. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  423. AC_CHECK_FUNCS([event_get_version \
  424. event_get_version_number \
  425. event_get_method \
  426. event_set_log_callback \
  427. evutil_secure_rng_set_urandom_device_file \
  428. evutil_secure_rng_init \
  429. event_base_loopexit])
  430. AC_CHECK_MEMBERS([struct event.min_heap_idx], , ,
  431. [#include <event.h>
  432. ])
  433. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  434. LIBS="$save_LIBS"
  435. LDFLAGS="$save_LDFLAGS"
  436. CPPFLAGS="$save_CPPFLAGS"
  437. AM_CONDITIONAL(USE_EXTERNAL_EVDNS, test x$ac_cv_header_event2_dns_h = xyes)
  438. if test "$enable_static_libevent" = "yes"; then
  439. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  440. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  441. else
  442. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  443. fi
  444. else
  445. TOR_LIBEVENT_LIBS="-levent"
  446. fi
  447. dnl This isn't the best test for Libevent 2.0.3-alpha. Once it's released,
  448. dnl we can do much better.
  449. if test "$enable_bufferevents" = "yes" ; then
  450. if test "$ac_cv_header_event2_bufferevent_ssl_h" != "yes" ; then
  451. AC_MSG_ERROR([You've asked for bufferevent support, but you're using a version of Libevent without SSL support. This won't work. We need Libevent 2.0.8-rc or later, and you don't seem to even have Libevent 2.0.3-alpha.])
  452. else
  453. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  454. # Check for the right version. First see if version detection works.
  455. AC_MSG_CHECKING([whether we can detect the Libevent version])
  456. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  457. #include <event2/event.h>
  458. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 10
  459. #error
  460. int x = y(zz);
  461. #else
  462. int x = 1;
  463. #endif
  464. ])], [event_version_number_works=yes; AC_MSG_RESULT([yes]) ],
  465. [event_version_number_works=no; AC_MSG_RESULT([no])])
  466. if test "$event_version_number_works" != 'yes'; then
  467. AC_MSG_WARN([Version detection on Libevent seems broken. Your Libevent installation is probably screwed up or very old.])
  468. else
  469. AC_MSG_CHECKING([whether Libevent is new enough for bufferevents])
  470. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  471. #include <event2/event.h>
  472. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000d00
  473. #error
  474. int x = y(zz);
  475. #else
  476. int x = 1;
  477. #endif
  478. ])], [ AC_MSG_RESULT([yes]) ],
  479. [ AC_MSG_RESULT([no])
  480. AC_MSG_ERROR([Libevent does not seem new enough to support bufferevents. We require 2.0.13-stable or later]) ] )
  481. fi
  482. fi
  483. fi
  484. LIBS="$save_LIBS"
  485. LDFLAGS="$save_LDFLAGS"
  486. CPPFLAGS="$save_CPPFLAGS"
  487. AM_CONDITIONAL(USE_BUFFEREVENTS, test "$enable_bufferevents" = "yes")
  488. if test "$enable_bufferevents" = "yes"; then
  489. AC_DEFINE(USE_BUFFEREVENTS, 1, [Defined if we're going to use Libevent's buffered IO API])
  490. if test "$enable_static_libevent" = "yes"; then
  491. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent_openssl.a $TOR_LIBEVENT_LIBS"
  492. else
  493. TOR_LIBEVENT_LIBS="-levent_openssl $TOR_LIBEVENT_LIBS"
  494. fi
  495. fi
  496. AC_SUBST(TOR_LIBEVENT_LIBS)
  497. dnl ------------------------------------------------------
  498. dnl Where do you live, libm?
  499. dnl On some platforms (Haiku/BeOS) the math library is
  500. dnl part of libroot. In which case don't link against lm
  501. TOR_LIB_MATH=""
  502. save_LIBS="$LIBS"
  503. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  504. if test "$ac_cv_search_pow" != "none required"; then
  505. TOR_LIB_MATH="$ac_cv_search_pow"
  506. fi
  507. LIBS="$save_LIBS"
  508. AC_SUBST(TOR_LIB_MATH)
  509. dnl ------------------------------------------------------
  510. dnl Where do you live, openssl? And how do we call you?
  511. tor_openssl_pkg_redhat="openssl"
  512. tor_openssl_pkg_debian="libssl-dev"
  513. tor_openssl_devpkg_redhat="openssl-devel"
  514. tor_openssl_devpkg_debian="libssl-dev"
  515. ALT_openssl_WITHVAL=""
  516. AC_ARG_WITH(ssl-dir,
  517. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  518. [
  519. if test "x$withval" != xno && test "x$withval" != "x" ; then
  520. ALT_openssl_WITHVAL="$withval"
  521. fi
  522. ])
  523. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  524. [#include <openssl/rand.h>],
  525. [void RAND_add(const void *buf, int num, double entropy);],
  526. [RAND_add((void*)0,0,0); exit(0);], [],
  527. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  528. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  529. if test "$enable_static_openssl" = "yes"; then
  530. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  531. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  532. else
  533. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  534. fi
  535. else
  536. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  537. fi
  538. AC_SUBST(TOR_OPENSSL_LIBS)
  539. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  540. [#include <openssl/ssl.h>
  541. ])
  542. dnl ------------------------------------------------------
  543. dnl Where do you live, zlib? And how do we call you?
  544. tor_zlib_pkg_redhat="zlib"
  545. tor_zlib_pkg_debian="zlib1g"
  546. tor_zlib_devpkg_redhat="zlib-devel"
  547. tor_zlib_devpkg_debian="zlib1g-dev"
  548. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  549. [#include <zlib.h>],
  550. [const char * zlibVersion(void);],
  551. [zlibVersion(); exit(0);], [--with-zlib-dir],
  552. [/opt/zlib])
  553. if test "$enable_static_zlib" = "yes"; then
  554. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  555. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  556. using --enable-static-zlib")
  557. else
  558. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  559. fi
  560. else
  561. TOR_ZLIB_LIBS="-lz"
  562. fi
  563. AC_SUBST(TOR_ZLIB_LIBS)
  564. dnl ---------------------------------------------------------------------
  565. dnl Now that we know about our major libraries, we can check for compiler
  566. dnl and linker hardening options. We need to do this with the libraries known,
  567. dnl since sometimes the linker will like an option but not be willing to
  568. dnl use it with a build of a library.
  569. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  570. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI"
  571. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  572. #if !defined(__clang__)
  573. #error
  574. #endif])], have_clang=yes, have_clang=no)
  575. if test x$enable_gcc_hardening != xno; then
  576. CFLAGS="$CFLAGS -D_FORTIFY_SOURCE=2"
  577. if test x$have_clang = xyes; then
  578. TOR_CHECK_CFLAGS(-Qunused-arguments)
  579. fi
  580. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  581. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  582. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  583. m4_ifdef([AS_VAR_IF],[
  584. AS_VAR_IF(can_compile, [yes],
  585. AS_VAR_IF(can_link, [yes],
  586. [],
  587. 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.)]))
  588. )])
  589. AS_VAR_POPDEF([can_link])
  590. AS_VAR_POPDEF([can_compile])
  591. TOR_CHECK_CFLAGS(-Wstack-protector)
  592. TOR_CHECK_CFLAGS(-fwrapv)
  593. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  594. if test "$bwin32" = "false"; then
  595. TOR_CHECK_CFLAGS(-fPIE)
  596. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  597. fi
  598. fi
  599. if test x$enable_expensive_hardening = xyes ; then
  600. TOR_CHECK_CFLAGS([-fsanitize=address])
  601. TOR_CHECK_CFLAGS([-fsanitize=undefined])
  602. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  603. fi
  604. if test x$enable_linker_hardening != xno; then
  605. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  606. fi
  607. # For backtrace support
  608. TOR_CHECK_LDFLAGS(-rdynamic)
  609. dnl ------------------------------------------------------
  610. dnl Now see if we have a -fomit-frame-pointer compiler option.
  611. saved_CFLAGS="$CFLAGS"
  612. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  613. F_OMIT_FRAME_POINTER=''
  614. if test "$saved_CFLAGS" != "$CFLAGS"; then
  615. if test x$enable_expensive_hardening != xyes ; then
  616. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  617. fi
  618. fi
  619. CFLAGS="$saved_CFLAGS"
  620. AC_SUBST(F_OMIT_FRAME_POINTER)
  621. dnl ------------------------------------------------------
  622. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  623. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  624. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  625. dnl code will work.
  626. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  627. dnl ------------------------------------------------------
  628. dnl Where do you live, libnatpmp? And how do we call you?
  629. dnl There are no packages for Debian or Redhat as of this patch
  630. if test "$natpmp" = "true"; then
  631. AC_DEFINE(NAT_PMP, 1, [Define to 1 if we are building with nat-pmp.])
  632. TOR_SEARCH_LIBRARY(libnatpmp, $trylibnatpmpdir, [-lnatpmp $TOR_LIB_WS32 $TOR_LIB_IPHLPAPI],
  633. [#include <natpmp.h>],
  634. [#ifdef _WIN32
  635. #define STATICLIB
  636. #endif
  637. #include <natpmp.h>],
  638. [ int r;
  639. natpmp_t natpmp;
  640. natpmpresp_t response;
  641. r = initnatpmp(&natpmp, 0, 0);],
  642. [printf("initnatpmp() returned %d (%s)\n", r, r?"FAILED":"SUCCESS");
  643. exit(0);],
  644. [--with-libnatpmp-dir],
  645. [/usr/lib/])
  646. fi
  647. dnl ------------------------------------------------------
  648. dnl Where do you live, libminiupnpc? And how do we call you?
  649. dnl There are no packages for Debian or Redhat as of this patch
  650. if test "$upnp" = "true"; then
  651. AC_DEFINE(MINIUPNPC, 1, [Define to 1 if we are building with UPnP.])
  652. dnl Before we call TOR_SEARCH_LIBRARY we'll do a quick compile test
  653. dnl to see if we have miniupnpc-1.5 or -1.6
  654. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <miniupnpc/miniupnpc.h>],
  655. [upnpDiscover(1, 0, 0, 0);exit(0);])],[miniupnpc15="true"],[miniupnpc15="false"])
  656. if test "$miniupnpc15" = "true" ; then
  657. AC_DEFINE([MINIUPNPC15],[1],[libminiupnpc version 1.5 found])
  658. TOR_SEARCH_LIBRARY(libminiupnpc, $trylibminiupnpcdir, [-lminiupnpc $TOR_LIB_WS32 $TOR_LIB_IPHLPAPI],
  659. [#include <miniupnpc/miniwget.h>
  660. #include <miniupnpc/miniupnpc.h>
  661. #include <miniupnpc/upnpcommands.h>],
  662. [void upnpDiscover(int delay, const char * multicastif,
  663. const char * minissdpdsock, int sameport);],
  664. [upnpDiscover(1, 0, 0, 0); exit(0);],
  665. [--with-libminiupnpc-dir],
  666. [/usr/lib/])
  667. else
  668. TOR_SEARCH_LIBRARY(libminiupnpc, $trylibminiupnpcdir, [-lminiupnpc $TOR_LIB_WS32 $TOR_LIB_IPHLPAPI],
  669. [#include <miniupnpc/miniwget.h>
  670. #include <miniupnpc/miniupnpc.h>
  671. #include <miniupnpc/upnpcommands.h>],
  672. [void upnpDiscover(int delay, const char * multicastif,
  673. const char * minissdpdsock, int sameport, int ipv6, int * error);],
  674. [upnpDiscover(1, 0, 0, 0, 0, 0); exit(0);],
  675. [--with-libminiupnpc-dir],
  676. [/usr/lib/])
  677. fi
  678. fi
  679. dnl ============================================================
  680. dnl Check for libseccomp
  681. if test "x$enable_seccomp" != "xno"; then
  682. AC_CHECK_HEADERS([seccomp.h])
  683. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  684. fi
  685. dnl ============================================================
  686. dnl Check for libscrypt
  687. if test "x$enable_libscrypt" != "xno"; then
  688. AC_CHECK_HEADERS([libscrypt.h])
  689. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  690. fi
  691. dnl ============================================================
  692. dnl We need an implementation of curve25519.
  693. dnl set these defaults.
  694. build_curve25519_donna=no
  695. build_curve25519_donna_c64=no
  696. use_curve25519_donna=no
  697. use_curve25519_nacl=no
  698. CURVE25519_LIBS=
  699. dnl The best choice is using curve25519-donna-c64, but that requires
  700. dnl that we
  701. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  702. tor_cv_can_use_curve25519_donna_c64,
  703. [AC_RUN_IFELSE(
  704. [AC_LANG_PROGRAM([dnl
  705. #include <stdint.h>
  706. typedef unsigned uint128_t __attribute__((mode(TI)));
  707. int func(uint64_t a, uint64_t b) {
  708. uint128_t c = ((uint128_t)a) * b;
  709. int ok = ((uint64_t)(c>>96)) == 522859 &&
  710. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  711. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  712. (((uint64_t)(c))&0xffffffffL) == 0;
  713. return ok;
  714. }
  715. ], [dnl
  716. int ok = func( ((uint64_t)2000000000) * 1000000000,
  717. ((uint64_t)1234567890) << 24);
  718. return !ok;
  719. ])],
  720. [tor_cv_can_use_curve25519_donna_c64=yes],
  721. [tor_cv_can_use_curve25519_donna_c64=no],
  722. [AC_LINK_IFELSE(
  723. [AC_LANG_PROGRAM([dnl
  724. #include <stdint.h>
  725. typedef unsigned uint128_t __attribute__((mode(TI)));
  726. int func(uint64_t a, uint64_t b) {
  727. uint128_t c = ((uint128_t)a) * b;
  728. int ok = ((uint64_t)(c>>96)) == 522859 &&
  729. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  730. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  731. (((uint64_t)(c))&0xffffffffL) == 0;
  732. return ok;
  733. }
  734. ], [dnl
  735. int ok = func( ((uint64_t)2000000000) * 1000000000,
  736. ((uint64_t)1234567890) << 24);
  737. return !ok;
  738. ])],
  739. [tor_cv_can_use_curve25519_donna_c64=cross],
  740. [tor_cv_can_use_curve25519_donna_c64=no])])])
  741. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  742. nacl/crypto_scalarmult_curve25519.h])
  743. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  744. tor_cv_can_use_curve25519_nacl,
  745. [tor_saved_LIBS="$LIBS"
  746. LIBS="$LIBS -lnacl"
  747. AC_LINK_IFELSE(
  748. [AC_LANG_PROGRAM([dnl
  749. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  750. #include <crypto_scalarmult_curve25519.h>
  751. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  752. #include <nacl/crypto_scalarmult_curve25519.h>
  753. #endif
  754. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  755. #error Hey, this is the reference implementation! That's not fast.
  756. #endif
  757. ], [
  758. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  759. ])], [tor_cv_can_use_curve25519_nacl=yes],
  760. [tor_cv_can_use_curve25519_nacl=no])
  761. LIBS="$tor_saved_LIBS" ])
  762. dnl Okay, now we need to figure out which one to actually use. Fall back
  763. dnl to curve25519-donna.c
  764. if test x$tor_cv_can_use_curve25519_donna_c64 != xno; then
  765. build_curve25519_donna_c64=yes
  766. use_curve25519_donna=yes
  767. elif test x$tor_cv_can_use_curve25519_nacl = xyes; then
  768. use_curve25519_nacl=yes
  769. CURVE25519_LIBS=-lnacl
  770. else
  771. build_curve25519_donna=yes
  772. use_curve25519_donna=yes
  773. fi
  774. if test x$use_curve25519_donna = xyes; then
  775. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  776. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  777. fi
  778. if test x$use_curve25519_nacl = xyes; then
  779. AC_DEFINE(USE_CURVE25519_NACL, 1,
  780. [Defined if we should use a curve25519 from nacl])
  781. fi
  782. AM_CONDITIONAL(BUILD_CURVE25519_DONNA, test x$build_curve25519_donna = xyes)
  783. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64, test x$build_curve25519_donna_c64 = xyes)
  784. AC_SUBST(CURVE25519_LIBS)
  785. dnl Make sure to enable support for large off_t if available.
  786. AC_SYS_LARGEFILE
  787. AC_CHECK_HEADERS(
  788. assert.h \
  789. errno.h \
  790. fcntl.h \
  791. signal.h \
  792. string.h \
  793. sys/fcntl.h \
  794. sys/stat.h \
  795. sys/time.h \
  796. sys/types.h \
  797. time.h \
  798. unistd.h
  799. , , AC_MSG_WARN(Some headers were not found, compilation may fail. If compilation succeeds, please send your orconfig.h to the developers so we can fix this warning.))
  800. dnl These headers are not essential
  801. AC_CHECK_HEADERS(
  802. arpa/inet.h \
  803. crt_externs.h \
  804. execinfo.h \
  805. grp.h \
  806. ifaddrs.h \
  807. inttypes.h \
  808. limits.h \
  809. linux/types.h \
  810. machine/limits.h \
  811. malloc.h \
  812. malloc/malloc.h \
  813. malloc_np.h \
  814. netdb.h \
  815. netinet/in.h \
  816. netinet/in6.h \
  817. pwd.h \
  818. stdint.h \
  819. sys/eventfd.h \
  820. sys/file.h \
  821. sys/ioctl.h \
  822. sys/limits.h \
  823. sys/mman.h \
  824. sys/param.h \
  825. sys/prctl.h \
  826. sys/resource.h \
  827. sys/select.h \
  828. sys/socket.h \
  829. sys/sysctl.h \
  830. sys/syslimits.h \
  831. sys/time.h \
  832. sys/types.h \
  833. sys/un.h \
  834. sys/utime.h \
  835. sys/wait.h \
  836. syslog.h \
  837. utime.h
  838. )
  839. AC_CHECK_HEADERS(sys/param.h)
  840. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  841. [#ifdef HAVE_SYS_TYPES_H
  842. #include <sys/types.h>
  843. #endif
  844. #ifdef HAVE_SYS_SOCKET_H
  845. #include <sys/socket.h>
  846. #endif])
  847. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  848. [#ifdef HAVE_SYS_TYPES_H
  849. #include <sys/types.h>
  850. #endif
  851. #ifdef HAVE_SYS_SOCKET_H
  852. #include <sys/socket.h>
  853. #endif
  854. #ifdef HAVE_NET_IF_H
  855. #include <net/if.h>
  856. #endif])
  857. AC_CHECK_HEADERS(linux/if.h,[],[],
  858. [
  859. #ifdef HAVE_SYS_SOCKET_H
  860. #include <sys/socket.h>
  861. #endif
  862. ])
  863. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  864. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  865. [#ifdef HAVE_SYS_TYPES_H
  866. #include <sys/types.h>
  867. #endif
  868. #ifdef HAVE_SYS_SOCKET_H
  869. #include <sys/socket.h>
  870. #endif
  871. #ifdef HAVE_LIMITS_H
  872. #include <limits.h>
  873. #endif
  874. #ifdef HAVE_LINUX_TYPES_H
  875. #include <linux/types.h>
  876. #endif
  877. #ifdef HAVE_NETINET_IN6_H
  878. #include <netinet/in6.h>
  879. #endif
  880. #ifdef HAVE_NETINET_IN_H
  881. #include <netinet/in.h>
  882. #endif])
  883. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  884. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  885. [#ifdef HAVE_SYS_TYPES_H
  886. #include <sys/types.h>
  887. #endif
  888. #ifdef HAVE_SYS_SOCKET_H
  889. #include <sys/socket.h>
  890. #endif
  891. #ifdef HAVE_LIMITS_H
  892. #include <limits.h>
  893. #endif
  894. #ifdef HAVE_LINUX_TYPES_H
  895. #include <linux/types.h>
  896. #endif
  897. #ifdef HAVE_NETINET_IN6_H
  898. #include <netinet/in6.h>
  899. #endif
  900. #ifdef HAVE_NETINET_IN_H
  901. #include <netinet/in.h>
  902. #endif
  903. #ifdef HAVE_LINUX_IF_H
  904. #include <linux/if.h>
  905. #endif])
  906. if test x$transparent = xtrue ; then
  907. transparent_ok=0
  908. if test x$net_if_found = x1 && test x$net_pfvar_found = x1 ; then
  909. transparent_ok=1
  910. fi
  911. if test x$linux_netfilter_ipv4 = x1 ; then
  912. transparent_ok=1
  913. fi
  914. if test x$linux_netfilter_ipv6_ip6_tables = x1 ; then
  915. transparent_ok=1
  916. fi
  917. if test x$transparent_ok = x1 ; then
  918. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  919. case $host in
  920. *-*-openbsd* | *-*-bitrig*)
  921. AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  922. esac
  923. else
  924. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  925. fi
  926. fi
  927. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  928. [#ifdef HAVE_SYS_TYPES_H
  929. #include <sys/types.h>
  930. #endif
  931. #ifdef HAVE_SYS_TIME_H
  932. #include <sys/time.h>
  933. #endif])
  934. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  935. dnl Watch out.
  936. AC_CHECK_SIZEOF(int8_t)
  937. AC_CHECK_SIZEOF(int16_t)
  938. AC_CHECK_SIZEOF(int32_t)
  939. AC_CHECK_SIZEOF(int64_t)
  940. AC_CHECK_SIZEOF(uint8_t)
  941. AC_CHECK_SIZEOF(uint16_t)
  942. AC_CHECK_SIZEOF(uint32_t)
  943. AC_CHECK_SIZEOF(uint64_t)
  944. AC_CHECK_SIZEOF(intptr_t)
  945. AC_CHECK_SIZEOF(uintptr_t)
  946. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  947. AC_CHECK_SIZEOF(char)
  948. AC_CHECK_SIZEOF(short)
  949. AC_CHECK_SIZEOF(int)
  950. AC_CHECK_SIZEOF(long)
  951. AC_CHECK_SIZEOF(long long)
  952. AC_CHECK_SIZEOF(__int64)
  953. AC_CHECK_SIZEOF(void *)
  954. AC_CHECK_SIZEOF(time_t)
  955. AC_CHECK_SIZEOF(size_t)
  956. AC_CHECK_SIZEOF(pid_t)
  957. AC_CHECK_TYPES([uint, u_char, ssize_t])
  958. AC_PC_FROM_UCONTEXT([/bin/true])
  959. dnl used to include sockaddr_storage, but everybody has that.
  960. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  961. [#ifdef HAVE_SYS_TYPES_H
  962. #include <sys/types.h>
  963. #endif
  964. #ifdef HAVE_NETINET_IN_H
  965. #include <netinet/in.h>
  966. #endif
  967. #ifdef HAVE_NETINET_IN6_H
  968. #include <netinet/in6.h>
  969. #endif
  970. #ifdef HAVE_SYS_SOCKET_H
  971. #include <sys/socket.h>
  972. #endif
  973. #ifdef _WIN32
  974. #define _WIN32_WINNT 0x0501
  975. #define WIN32_LEAN_AND_MEAN
  976. #if defined(_MSC_VER) && (_MSC_VER < 1300)
  977. #include <winsock.h>
  978. #else
  979. #include <winsock2.h>
  980. #include <ws2tcpip.h>
  981. #endif
  982. #endif
  983. ])
  984. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  985. [#ifdef HAVE_SYS_TYPES_H
  986. #include <sys/types.h>
  987. #endif
  988. #ifdef HAVE_NETINET_IN_H
  989. #include <netinet/in.h>
  990. #endif
  991. #ifdef HAVE_NETINET_IN6_H
  992. #include <netinet/in6.h>
  993. #endif
  994. #ifdef HAVE_SYS_SOCKET_H
  995. #include <sys/socket.h>
  996. #endif
  997. #ifdef _WIN32
  998. #define _WIN32_WINNT 0x0501
  999. #define WIN32_LEAN_AND_MEAN
  1000. #if defined(_MSC_VER) && (_MSC_VER < 1300)
  1001. #include <winsock.h>
  1002. #else
  1003. #include <winsock2.h>
  1004. #include <ws2tcpip.h>
  1005. #endif
  1006. #endif
  1007. ])
  1008. AC_CHECK_TYPES([rlim_t], , ,
  1009. [#ifdef HAVE_SYS_TYPES_H
  1010. #include <sys/types.h>
  1011. #endif
  1012. #ifdef HAVE_SYS_TIME_H
  1013. #include <sys/time.h>
  1014. #endif
  1015. #ifdef HAVE_SYS_RESOURCE_H
  1016. #include <sys/resource.h>
  1017. #endif
  1018. ])
  1019. AX_CHECK_SIGN([time_t],
  1020. [ AC_DEFINE(TIME_T_IS_SIGNED, 1, [Define if time_t is signed]) ],
  1021. [ : ], [
  1022. #ifdef HAVE_SYS_TYPES_H
  1023. #include <sys/types.h>
  1024. #endif
  1025. #ifdef HAVE_SYS_TIME_H
  1026. #include <sys/time.h>
  1027. #endif
  1028. #ifdef HAVE_TIME_H
  1029. #include <time.h>
  1030. #endif
  1031. ])
  1032. if test "$ax_cv_decl_time_t_signed" = no; then
  1033. AC_MSG_WARN([You have an unsigned time_t; some things will probably break. Please tell the Tor developers about your interesting platform.])
  1034. fi
  1035. AX_CHECK_SIGN([size_t],
  1036. [ tor_cv_size_t_signed=yes ],
  1037. [ tor_cv_size_t_signed=no ], [
  1038. #ifdef HAVE_SYS_TYPES_H
  1039. #include <sys/types.h>
  1040. #endif
  1041. ])
  1042. if test "$ax_cv_decl_size_t_signed" = yes; then
  1043. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1044. fi
  1045. AX_CHECK_SIGN([enum always],
  1046. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1047. [ : ], [
  1048. enum always { AAA, BBB, CCC };
  1049. ])
  1050. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1051. #ifdef HAVE_SYS_SOCKET_H
  1052. #include <sys/socket.h>
  1053. #endif
  1054. ])
  1055. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1056. AC_CHECK_SIZEOF(cell_t)
  1057. # Now make sure that NULL can be represented as zero bytes.
  1058. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1059. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1060. [[#include <stdlib.h>
  1061. #include <string.h>
  1062. #include <stdio.h>
  1063. #ifdef HAVE_STDDEF_H
  1064. #include <stddef.h>
  1065. #endif
  1066. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1067. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1068. [tor_cv_null_is_zero=yes],
  1069. [tor_cv_null_is_zero=no],
  1070. [tor_cv_null_is_zero=cross])])
  1071. if test "$tor_cv_null_is_zero" = cross ; then
  1072. # Cross-compiling; let's hope that the target isn't raving mad.
  1073. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1074. fi
  1075. if test "$tor_cv_null_is_zero" != no; then
  1076. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1077. [Define to 1 iff memset(0) sets pointers to NULL])
  1078. fi
  1079. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1080. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1081. [[#include <stdlib.h>
  1082. #include <string.h>
  1083. #include <stdio.h>
  1084. #ifdef HAVE_STDDEF_H
  1085. #include <stddef.h>
  1086. #endif
  1087. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1088. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1089. [tor_cv_dbl0_is_zero=yes],
  1090. [tor_cv_dbl0_is_zero=no],
  1091. [tor_cv_dbl0_is_zero=cross])])
  1092. if test "$tor_cv_dbl0_is_zero" = cross ; then
  1093. # Cross-compiling; let's hope that the target isn't raving mad.
  1094. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1095. fi
  1096. if test "$tor_cv_dbl0_is_zero" != no; then
  1097. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1098. [Define to 1 iff memset(0) sets doubles to 0.0])
  1099. fi
  1100. # And what happens when we malloc zero?
  1101. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1102. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1103. [[#include <stdlib.h>
  1104. #include <string.h>
  1105. #include <stdio.h>
  1106. #ifdef HAVE_STDDEF_H
  1107. #include <stddef.h>
  1108. #endif
  1109. int main () { return malloc(0)?0:1; }]])],
  1110. [tor_cv_malloc_zero_works=yes],
  1111. [tor_cv_malloc_zero_works=no],
  1112. [tor_cv_malloc_zero_works=cross])])
  1113. if test "$tor_cv_malloc_zero_works" = cross; then
  1114. # Cross-compiling; let's hope that the target isn't raving mad.
  1115. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1116. fi
  1117. if test "$tor_cv_malloc_zero_works" = yes; then
  1118. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1119. [Define to 1 iff malloc(0) returns a pointer])
  1120. fi
  1121. # whether we seem to be in a 2s-complement world.
  1122. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1123. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1124. [[int main () { int problem = ((-99) != (~99)+1);
  1125. return problem ? 1 : 0; }]])],
  1126. [tor_cv_twos_complement=yes],
  1127. [tor_cv_twos_complement=no],
  1128. [tor_cv_twos_complement=cross])])
  1129. if test "$tor_cv_twos_complement" = cross ; then
  1130. # Cross-compiling; let's hope that the target isn't raving mad.
  1131. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1132. fi
  1133. if test "$tor_cv_twos_complement" != no ; then
  1134. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1135. [Define to 1 iff we represent negative integers with two's complement])
  1136. fi
  1137. # What does shifting a negative value do?
  1138. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1139. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1140. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1141. [tor_cv_sign_extend=yes],
  1142. [tor_cv_sign_extend=no],
  1143. [tor_cv_sign_extend=cross])])
  1144. if test "$tor_cv_sign_extend" = cross ; then
  1145. # Cross-compiling; let's hope that the target isn't raving mad.
  1146. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1147. fi
  1148. if test "$tor_cv_sign_extend" != no ; then
  1149. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1150. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1151. fi
  1152. # Whether we should use the dmalloc memory allocation debugging library.
  1153. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1154. AC_ARG_WITH(dmalloc,
  1155. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1156. [if [[ "$withval" = "yes" ]]; then
  1157. dmalloc=1
  1158. AC_MSG_RESULT(yes)
  1159. else
  1160. dmalloc=1
  1161. AC_MSG_RESULT(no)
  1162. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1163. )
  1164. if [[ $dmalloc -eq 1 ]]; then
  1165. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1166. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1167. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1168. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1169. fi
  1170. AC_ARG_WITH(tcmalloc,
  1171. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1172. [ tcmalloc=yes ], [ tcmalloc=no ])
  1173. if test x$tcmalloc = xyes ; then
  1174. LDFLAGS="-ltcmalloc $LDFLAGS"
  1175. fi
  1176. using_custom_malloc=no
  1177. if test x$enable_openbsd_malloc = xyes ; then
  1178. using_custom_malloc=yes
  1179. fi
  1180. if test x$tcmalloc = xyes ; then
  1181. using_custom_malloc=yes
  1182. fi
  1183. if test $using_custom_malloc = no ; then
  1184. AC_CHECK_FUNCS(mallinfo)
  1185. fi
  1186. # By default, we're going to assume we don't have mlockall()
  1187. # bionic and other platforms have various broken mlockall subsystems.
  1188. # Some systems don't have a working mlockall, some aren't linkable,
  1189. # and some have it but don't declare it.
  1190. AC_CHECK_FUNCS(mlockall)
  1191. AC_CHECK_DECLS([mlockall], , , [
  1192. #ifdef HAVE_SYS_MMAN_H
  1193. #include <sys/mman.h>
  1194. #endif])
  1195. # Allow user to specify an alternate syslog facility
  1196. AC_ARG_WITH(syslog-facility,
  1197. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1198. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1199. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1200. AC_SUBST(LOGFACILITY)
  1201. # Check if we have getresuid and getresgid
  1202. AC_CHECK_FUNCS(getresuid getresgid)
  1203. # Check for gethostbyname_r in all its glorious incompatible versions.
  1204. # (This logic is based on that in Python's configure.in)
  1205. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1206. [Define this if you have any gethostbyname_r()])
  1207. AC_CHECK_FUNC(gethostbyname_r, [
  1208. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1209. OLD_CFLAGS=$CFLAGS
  1210. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1211. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([
  1212. #include <netdb.h>
  1213. ], [[
  1214. char *cp1, *cp2;
  1215. struct hostent *h1, *h2;
  1216. int i1, i2;
  1217. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1218. ]])],[
  1219. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1220. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1221. [Define this if gethostbyname_r takes 6 arguments])
  1222. AC_MSG_RESULT(6)
  1223. ], [
  1224. AC_TRY_COMPILE([
  1225. #include <netdb.h>
  1226. ], [
  1227. char *cp1, *cp2;
  1228. struct hostent *h1;
  1229. int i1, i2;
  1230. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1231. ], [
  1232. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1233. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1234. [Define this if gethostbyname_r takes 5 arguments])
  1235. AC_MSG_RESULT(5)
  1236. ], [
  1237. AC_TRY_COMPILE([
  1238. #include <netdb.h>
  1239. ], [
  1240. char *cp1;
  1241. struct hostent *h1;
  1242. struct hostent_data hd;
  1243. (void) gethostbyname_r(cp1,h1,&hd);
  1244. ], [
  1245. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1246. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1247. [Define this if gethostbyname_r takes 3 arguments])
  1248. AC_MSG_RESULT(3)
  1249. ], [
  1250. AC_MSG_RESULT(0)
  1251. ])
  1252. ])
  1253. ])
  1254. CFLAGS=$OLD_CFLAGS
  1255. ])
  1256. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1257. tor_cv_have_func_macro,
  1258. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1259. #include <stdio.h>
  1260. int main(int c, char **v) { puts(__func__); }])],
  1261. tor_cv_have_func_macro=yes,
  1262. tor_cv_have_func_macro=no))
  1263. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1264. tor_cv_have_FUNC_macro,
  1265. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1266. #include <stdio.h>
  1267. int main(int c, char **v) { puts(__FUNC__); }])],
  1268. tor_cv_have_FUNC_macro=yes,
  1269. tor_cv_have_FUNC_macro=no))
  1270. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1271. tor_cv_have_FUNCTION_macro,
  1272. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1273. #include <stdio.h>
  1274. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1275. tor_cv_have_FUNCTION_macro=yes,
  1276. tor_cv_have_FUNCTION_macro=no))
  1277. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1278. tor_cv_have_environ_declared,
  1279. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1280. /* We define _GNU_SOURCE here because it is also defined in compat.c.
  1281. * Without it environ doesn't get declared. */
  1282. #define _GNU_SOURCE
  1283. #ifdef HAVE_UNISTD_H
  1284. #include <unistd.h>
  1285. #endif
  1286. #include <stdlib.h>
  1287. int main(int c, char **v) { char **t = environ; }])],
  1288. tor_cv_have_environ_declared=yes,
  1289. tor_cv_have_environ_declared=no))
  1290. if test "$tor_cv_have_func_macro" = 'yes'; then
  1291. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1292. fi
  1293. if test "$tor_cv_have_FUNC_macro" = 'yes'; then
  1294. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1295. fi
  1296. if test "$tor_cv_have_FUNCTION_macro" = 'yes'; then
  1297. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1298. [Defined if the compiler supports __FUNCTION__])
  1299. fi
  1300. if test "$tor_cv_have_environ_declared" = 'yes'; then
  1301. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1302. [Defined if we have extern char **environ already declared])
  1303. fi
  1304. # $prefix stores the value of the --prefix command line option, or
  1305. # NONE if the option wasn't set. In the case that it wasn't set, make
  1306. # it be the default, so that we can use it to expand directories now.
  1307. if test "x$prefix" = "xNONE"; then
  1308. prefix=$ac_default_prefix
  1309. fi
  1310. # and similarly for $exec_prefix
  1311. if test "x$exec_prefix" = "xNONE"; then
  1312. exec_prefix=$prefix
  1313. fi
  1314. if test "x$BUILDDIR" = "x"; then
  1315. BUILDDIR=`pwd`
  1316. fi
  1317. AC_SUBST(BUILDDIR)
  1318. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1319. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1320. if test "x$CONFDIR" = "x"; then
  1321. CONFDIR=`eval echo $sysconfdir/tor`
  1322. fi
  1323. AC_SUBST(CONFDIR)
  1324. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1325. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1326. BINDIR=`eval echo $bindir`
  1327. AC_SUBST(BINDIR)
  1328. LOCALSTATEDIR=`eval echo $localstatedir`
  1329. AC_SUBST(LOCALSTATEDIR)
  1330. if test "$bwin32" = true; then
  1331. # Test if the linker supports the --nxcompat and --dynamicbase options
  1332. # for Windows
  1333. save_LDFLAGS="$LDFLAGS"
  1334. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1335. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1336. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1337. [AC_MSG_RESULT([yes])]
  1338. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1339. [AC_MSG_RESULT([no])]
  1340. )
  1341. LDFLAGS="$save_LDFLAGS"
  1342. fi
  1343. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1344. # than autoconf's macros like.
  1345. if test "$GCC" = yes; then
  1346. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1347. # accident waiting to happen.
  1348. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1349. else
  1350. # Override optimization level for non-gcc compilers
  1351. CFLAGS="$CFLAGS -O"
  1352. enable_gcc_warnings=no
  1353. enable_gcc_warnings_advisory=no
  1354. fi
  1355. # OS X Lion started deprecating the system openssl. Let's just disable
  1356. # all deprecation warnings on OS X. Also, to potentially make the binary
  1357. # a little smaller, let's enable dead_strip.
  1358. case "$host_os" in
  1359. darwin*)
  1360. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1361. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1362. esac
  1363. # Add some more warnings which we use in development but not in the
  1364. # released versions. (Some relevant gcc versions can't handle these.)
  1365. if test x$enable_gcc_warnings = xyes || test x$enable_gcc_warnings_advisory = xyes; then
  1366. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1367. #if !defined(__GNUC__) || (__GNUC__ < 4)
  1368. #error
  1369. #endif])], have_gcc4=yes, have_gcc4=no)
  1370. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1371. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)
  1372. #error
  1373. #endif])], have_gcc42=yes, have_gcc42=no)
  1374. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1375. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
  1376. #error
  1377. #endif])], have_gcc43=yes, have_gcc43=no)
  1378. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  1379. #if !defined(__GNUC__) || (__GNUC__ < 4) || (__GNUC__ == 4 && __GNUC_MINOR__ < 6)
  1380. #error
  1381. #endif])], have_gcc46=yes, have_gcc46=no)
  1382. save_CFLAGS="$CFLAGS"
  1383. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1384. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], have_shorten64_flag=yes,
  1385. have_shorten64_flag=no)
  1386. CFLAGS="$save_CFLAGS"
  1387. case $host in
  1388. *-*-openbsd* | *-*-bitrig*)
  1389. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1390. # That's fine, except that the headers don't pass -Wredundant-decls.
  1391. # Therefore, let's disable -Wsystem-headers when we're building
  1392. # with maximal warnings on OpenBSD.
  1393. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1394. esac
  1395. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1396. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1397. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1398. CFLAGS="$CFLAGS -Wwrite-strings -Wmissing-declarations -Wredundant-decls"
  1399. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1400. if test x$enable_gcc_warnings = xyes; then
  1401. CFLAGS="$CFLAGS -Werror"
  1402. fi
  1403. # Disabled, so we can use mallinfo(): -Waggregate-return
  1404. if test x$have_gcc4 = xyes ; then
  1405. # These warnings break gcc 3.3.5 and work on gcc 4.0.2
  1406. CFLAGS="$CFLAGS -Winit-self -Wmissing-field-initializers -Wold-style-definition"
  1407. fi
  1408. if test x$have_gcc42 = xyes ; then
  1409. # These warnings break gcc 4.0.2 and work on gcc 4.2
  1410. # XXXX020 See if any of these work with earlier versions.
  1411. CFLAGS="$CFLAGS -Waddress -Wmissing-noreturn -Wstrict-overflow=1"
  1412. # We used to use -Wstrict-overflow=5, but that breaks us heavily under 4.3.
  1413. fi
  1414. if test x$have_gcc42 = xyes && test x$have_clang = xno; then
  1415. # These warnings break gcc 4.0.2 and clang, but work on gcc 4.2
  1416. CFLAGS="$CFLAGS -Wnormalized=id -Woverride-init"
  1417. fi
  1418. if test x$have_gcc43 = xyes ; then
  1419. # These warnings break gcc 4.2 and work on gcc 4.3
  1420. # XXXX020 See if any of these work with earlier versions.
  1421. CFLAGS="$CFLAGS -Wextra -Warray-bounds"
  1422. fi
  1423. if test x$have_gcc46 = xyes ; then
  1424. # This warning was added in gcc 4.3, but it appears to generate
  1425. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1426. CFLAGS="$CFLAGS -Wlogical-op"
  1427. fi
  1428. if test x$have_shorten64_flag = xyes ; then
  1429. CFLAGS="$CFLAGS -Wshorten-64-to-32"
  1430. fi
  1431. ##This will break the world on some 64-bit architectures
  1432. # CFLAGS="$CFLAGS -Winline"
  1433. fi
  1434. if test "$enable_coverage" = yes && test "$have_clang" = "no"; then
  1435. case "$host_os" in
  1436. darwin*)
  1437. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-profiling.])
  1438. esac
  1439. fi
  1440. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1441. AC_CONFIG_FILES([
  1442. Doxyfile
  1443. Makefile
  1444. contrib/dist/suse/tor.sh
  1445. contrib/operator-tools/tor.logrotate
  1446. contrib/dist/tor.sh
  1447. contrib/dist/torctl
  1448. contrib/dist/tor.service
  1449. src/config/torrc.sample
  1450. src/config/torrc.minimal
  1451. scripts/maint/checkOptionDocs.pl
  1452. scripts/maint/updateVersions.pl
  1453. ])
  1454. if test x$asciidoc = xtrue && test "$ASCIIDOC" = "none" ; then
  1455. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1456. for file in $regular_mans ; do
  1457. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1458. echo "==================================";
  1459. echo;
  1460. echo "Building Tor has failed since manpages cannot be built.";
  1461. echo;
  1462. echo "You need asciidoc installed to be able to build the manpages.";
  1463. echo "To build without manpages, use the --disable-asciidoc argument";
  1464. echo "when calling configure.";
  1465. echo;
  1466. echo "==================================";
  1467. exit 1;
  1468. fi
  1469. done
  1470. fi
  1471. AC_OUTPUT