configure.ac 67 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) 2007-2017, The Tor Project, Inc.
  4. dnl See LICENSE for licensing information
  5. AC_PREREQ([2.63])
  6. AC_INIT([tor],[0.3.1.9-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. AC_ARG_ENABLE(memory-sentinels,
  49. AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
  50. AC_ARG_ENABLE(rust,
  51. AS_HELP_STRING(--enable-rust, [enable rust integration]))
  52. AC_ARG_ENABLE(cargo-online-mode,
  53. AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
  54. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  55. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  56. fi
  57. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  58. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  59. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  60. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  61. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  62. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  63. if test "$enable_static_tor" = "yes"; then
  64. enable_static_libevent="yes";
  65. enable_static_openssl="yes";
  66. enable_static_zlib="yes";
  67. CFLAGS="$CFLAGS -static"
  68. fi
  69. if test "$enable_system_torrc" = "no"; then
  70. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  71. [Defined if we're not going to look for a torrc in SYSCONF])
  72. fi
  73. if test "$enable_memory_sentinels" = "no"; then
  74. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  75. [Defined if we're turning off memory safety code to look for bugs])
  76. fi
  77. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  78. AC_ARG_ENABLE(asciidoc,
  79. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  80. [case "${enableval}" in
  81. "yes") asciidoc=true ;;
  82. "no") asciidoc=false ;;
  83. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  84. esac], [asciidoc=true])
  85. # systemd notify support
  86. AC_ARG_ENABLE(systemd,
  87. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  88. [case "${enableval}" in
  89. "yes") systemd=true ;;
  90. "no") systemd=false ;;
  91. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  92. esac], [systemd=auto])
  93. # systemd support
  94. if test "x$enable_systemd" = "xno"; then
  95. have_systemd=no;
  96. else
  97. PKG_CHECK_MODULES(SYSTEMD,
  98. [libsystemd-daemon],
  99. have_systemd=yes,
  100. have_systemd=no)
  101. if test "x$have_systemd" = "xno"; then
  102. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  103. PKG_CHECK_MODULES(SYSTEMD,
  104. [libsystemd],
  105. have_systemd=yes,
  106. have_systemd=no)
  107. fi
  108. fi
  109. if test "x$have_systemd" = "xyes"; then
  110. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  111. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  112. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  113. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  114. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  115. fi
  116. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  117. AC_SUBST(TOR_SYSTEMD_LIBS)
  118. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  119. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  120. fi
  121. case "$host" in
  122. *-*-solaris* )
  123. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  124. ;;
  125. esac
  126. AC_ARG_ENABLE(gcc-warnings,
  127. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  128. AC_ARG_ENABLE(fatal-warnings,
  129. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  130. AC_ARG_ENABLE(gcc-warnings-advisory,
  131. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  132. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  133. AC_ARG_ENABLE(gcc-hardening,
  134. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  135. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  136. AC_ARG_ENABLE(expensive-hardening,
  137. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  138. AC_ARG_ENABLE(fragile-hardening,
  139. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  140. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  141. fragile_hardening="yes"
  142. fi
  143. dnl Linker hardening options
  144. dnl Currently these options are ELF specific - you can't use this with MacOSX
  145. AC_ARG_ENABLE(linker-hardening,
  146. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  147. AC_ARG_ENABLE(local-appdata,
  148. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  149. if test "$enable_local_appdata" = "yes"; then
  150. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  151. [Defined if we default to host local appdata paths on Windows])
  152. fi
  153. # Tor2web mode flag
  154. AC_ARG_ENABLE(tor2web-mode,
  155. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  156. [if test "x$enableval" = "xyes"; then
  157. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  158. fi])
  159. AC_ARG_ENABLE(tool-name-check,
  160. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  161. AC_ARG_ENABLE(seccomp,
  162. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  163. AC_ARG_ENABLE(libscrypt,
  164. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  165. dnl Enable event tracing which are transformed to debug log statement.
  166. AC_ARG_ENABLE(event-tracing-debug,
  167. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  168. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  169. if test x$enable_event_tracing_debug = xyes; then
  170. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  171. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  172. fi
  173. dnl check for the correct "ar" when cross-compiling.
  174. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  175. dnl so kludge up a replacement for the case where it isn't there yet.)
  176. m4_ifdef([AM_PROG_AR],
  177. [AM_PROG_AR],
  178. [AN_MAKEVAR([AR], [AC_PROG_AR])
  179. AN_PROGRAM([ar], [AC_PROG_AR])
  180. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  181. AC_PROG_AR])
  182. dnl Check whether the above macro has settled for a simply named tool even
  183. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  184. dnl because that will find any cc on the system, not only the cross-compiler,
  185. dnl and then verify that a binary built with this compiler runs on the
  186. dnl build system. It will then come to the false conclusion that we're not
  187. dnl cross-compiling.
  188. if test "x$enable_tool_name_check" != "xno"; then
  189. if test "x$ac_tool_warned" = "xyes"; then
  190. 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.)])
  191. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  192. 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.)])
  193. fi
  194. fi
  195. AC_PROG_CC
  196. AC_PROG_CPP
  197. AC_PROG_MAKE_SET
  198. AC_PROG_RANLIB
  199. AC_PROG_SED
  200. AC_ARG_VAR([PERL], [path to Perl binary])
  201. AC_CHECK_PROGS([PERL], [perl])
  202. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  203. dnl check for asciidoc and a2x
  204. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  205. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  206. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  207. AM_PROG_CC_C_O
  208. AC_PROG_CC_C99
  209. AC_ARG_VAR([PYTHON], [path to Python binary])
  210. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  211. if test "x$PYTHON" = "x"; then
  212. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  213. fi
  214. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  215. dnl List all external rust crates we depend on here. Include the version
  216. rust_crates="libc-0.2.22"
  217. AC_SUBST(rust_crates)
  218. if test "x$enable_rust" = "xyes"; then
  219. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  220. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  221. if test "x$RUSTC" = "xno"; then
  222. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  223. fi
  224. AC_ARG_VAR([CARGO], [path to the cargo binary])
  225. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  226. if test "x$CARGO" = "xno"; then
  227. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  228. fi
  229. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  230. if test "x$enable_cargo_online_mode" = "xyes"; then
  231. CARGO_ONLINE=
  232. RUST_DL=#
  233. else
  234. CARGO_ONLINE=--frozen
  235. RUST_DL=
  236. dnl When we're not allowed to touch the network, we need crate dependencies
  237. dnl locally available.
  238. AC_MSG_CHECKING([rust crate dependencies])
  239. AC_ARG_VAR([RUST_DEPENDENCIES], [path to directory with local crate mirror])
  240. if test "x$RUST_DEPENDENCIES" = "x"; then
  241. RUST_DEPENDENCIES="$srcdir/src/ext/rust/"
  242. NEED_MOD=1
  243. fi
  244. if test ! -d "$RUST_DEPENDENCIES"; then
  245. AC_MSG_ERROR([Rust dependency directory $RUST_DEPENDENCIES does not exist. Specify a dependency directory using the RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  246. fi
  247. for dep in $rust_crates; do
  248. if test ! -d "$RUST_DEPENDENCIES"/"$dep"; then
  249. AC_MSG_ERROR([Failure to find rust dependency $RUST_DEPENDENCIES/$dep. Specify a dependency directory using the RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  250. fi
  251. done
  252. if test "x$NEED_MOD" = "x1"; then
  253. dnl When looking for dependencies from cargo, pick right directory
  254. RUST_DEPENDENCIES="../../src/ext/rust"
  255. fi
  256. fi
  257. AC_SUBST(CARGO_ONLINE)
  258. AC_SUBST(RUST_DL)
  259. dnl Let's check the rustc version, too
  260. AC_MSG_CHECKING([rust version])
  261. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  262. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  263. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  264. AC_MSG_ERROR([rustc version couldn't be identified])
  265. fi
  266. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  267. AC_MSG_ERROR([rustc must be at least version 1.14])
  268. fi
  269. fi
  270. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  271. AC_C_FLEXIBLE_ARRAY_MEMBER
  272. ], [
  273. dnl Maybe we've got an old autoconf...
  274. AC_CACHE_CHECK([for flexible array members],
  275. tor_cv_c_flexarray,
  276. [AC_COMPILE_IFELSE(
  277. AC_LANG_PROGRAM([
  278. struct abc { int a; char b[]; };
  279. ], [
  280. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  281. def->b[0] = 33;
  282. ]),
  283. [tor_cv_c_flexarray=yes],
  284. [tor_cv_c_flexarray=no])])
  285. if test "$tor_cv_flexarray" = "yes"; then
  286. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  287. else
  288. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  289. fi
  290. ])
  291. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  292. tor_cv_c_c99_decl,
  293. [AC_COMPILE_IFELSE(
  294. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  295. [tor_cv_c_c99_decl=yes],
  296. [tor_cv_c_c99_decl=no] )])
  297. if test "$tor_cv_c_c99_decl" != "yes"; then
  298. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  299. fi
  300. AC_CACHE_CHECK([for working C99 designated initializers],
  301. tor_cv_c_c99_designated_init,
  302. [AC_COMPILE_IFELSE(
  303. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  304. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  305. [tor_cv_c_c99_designated_init=yes],
  306. [tor_cv_c_c99_designated_init=no] )])
  307. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  308. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  309. fi
  310. TORUSER=_tor
  311. AC_ARG_WITH(tor-user,
  312. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  313. [
  314. TORUSER=$withval
  315. ]
  316. )
  317. AC_SUBST(TORUSER)
  318. TORGROUP=_tor
  319. AC_ARG_WITH(tor-group,
  320. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  321. [
  322. TORGROUP=$withval
  323. ]
  324. )
  325. AC_SUBST(TORGROUP)
  326. dnl If _WIN32 is defined and non-zero, we are building for win32
  327. AC_MSG_CHECKING([for win32])
  328. AC_RUN_IFELSE([AC_LANG_SOURCE([
  329. int main(int c, char **v) {
  330. #ifdef _WIN32
  331. #if _WIN32
  332. return 0;
  333. #else
  334. return 1;
  335. #endif
  336. #else
  337. return 2;
  338. #endif
  339. }])],
  340. bwin32=true; AC_MSG_RESULT([yes]),
  341. bwin32=false; AC_MSG_RESULT([no]),
  342. bwin32=cross; AC_MSG_RESULT([cross])
  343. )
  344. if test "$bwin32" = "cross"; then
  345. AC_MSG_CHECKING([for win32 (cross)])
  346. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  347. #ifdef _WIN32
  348. int main(int c, char **v) {return 0;}
  349. #else
  350. #error
  351. int main(int c, char **v) {return x(y);}
  352. #endif
  353. ])],
  354. bwin32=true; AC_MSG_RESULT([yes]),
  355. bwin32=false; AC_MSG_RESULT([no]))
  356. fi
  357. AH_BOTTOM([
  358. #ifdef _WIN32
  359. /* Defined to access windows functions and definitions for >=WinXP */
  360. # ifndef WINVER
  361. # define WINVER 0x0501
  362. # endif
  363. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  364. # ifndef _WIN32_WINNT
  365. # define _WIN32_WINNT 0x0501
  366. # endif
  367. /* Defined to avoid including some windows headers as part of Windows.h */
  368. # ifndef WIN32_LEAN_AND_MEAN
  369. # define WIN32_LEAN_AND_MEAN 1
  370. # endif
  371. #endif
  372. ])
  373. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  374. dnl Enable C99 when compiling with MIPSpro
  375. AC_MSG_CHECKING([for MIPSpro compiler])
  376. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  377. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  378. #error
  379. return x(y);
  380. #endif
  381. ])],
  382. bmipspro=false; AC_MSG_RESULT(no),
  383. bmipspro=true; AC_MSG_RESULT(yes))
  384. if test "$bmipspro" = "true"; then
  385. CFLAGS="$CFLAGS -c99"
  386. fi
  387. AC_C_BIGENDIAN
  388. AC_SEARCH_LIBS(socket, [socket network])
  389. AC_SEARCH_LIBS(gethostbyname, [nsl])
  390. AC_SEARCH_LIBS(dlopen, [dl])
  391. AC_SEARCH_LIBS(inet_aton, [resolv])
  392. AC_SEARCH_LIBS(backtrace, [execinfo])
  393. saved_LIBS="$LIBS"
  394. AC_SEARCH_LIBS([clock_gettime], [rt])
  395. if test "$LIBS" != "$saved_LIBS"; then
  396. # Looks like we need -lrt for clock_gettime().
  397. have_rt=yes
  398. fi
  399. AC_SEARCH_LIBS(pthread_create, [pthread])
  400. AC_SEARCH_LIBS(pthread_detach, [pthread])
  401. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  402. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  403. AC_CHECK_FUNCS(
  404. _NSGetEnviron \
  405. RtlSecureZeroMemory \
  406. SecureZeroMemory \
  407. accept4 \
  408. backtrace \
  409. backtrace_symbols_fd \
  410. eventfd \
  411. explicit_bzero \
  412. timingsafe_memcmp \
  413. flock \
  414. ftime \
  415. getaddrinfo \
  416. getifaddrs \
  417. getpass \
  418. getrlimit \
  419. gettimeofday \
  420. gmtime_r \
  421. gnu_get_libc_version \
  422. htonll \
  423. inet_aton \
  424. ioctl \
  425. issetugid \
  426. llround \
  427. localtime_r \
  428. lround \
  429. memmem \
  430. memset_s \
  431. pipe \
  432. pipe2 \
  433. prctl \
  434. readpassphrase \
  435. rint \
  436. sigaction \
  437. socketpair \
  438. statvfs \
  439. strlcat \
  440. strlcpy \
  441. strnlen \
  442. strptime \
  443. strtok_r \
  444. strtoull \
  445. sysconf \
  446. sysctl \
  447. truncate \
  448. uname \
  449. usleep \
  450. vasprintf \
  451. _vscprintf
  452. )
  453. # Apple messed up when they added two functions functions in Sierra: they
  454. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  455. # checks. So we should only probe for those functions if we are sure that we
  456. # are not targetting OSX 10.11 or earlier.
  457. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  458. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  459. #ifdef __APPLE__
  460. # include <AvailabilityMacros.h>
  461. # ifndef MAC_OS_X_VERSION_10_12
  462. # define MAC_OS_X_VERSION_10_12 101200
  463. # endif
  464. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  465. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  466. # error "Running on Mac OSX 10.11 or earlier"
  467. # endif
  468. # endif
  469. #endif
  470. ]], [[]])],
  471. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  472. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  473. if test "$on_macos_pre_10_12" = "no"; then
  474. AC_CHECK_FUNCS(
  475. clock_gettime \
  476. getentropy \
  477. )
  478. fi
  479. if test "$bwin32" != "true"; then
  480. AC_CHECK_HEADERS(pthread.h)
  481. AC_CHECK_FUNCS(pthread_create)
  482. AC_CHECK_FUNCS(pthread_condattr_setclock)
  483. fi
  484. if test "$bwin32" = "true"; then
  485. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  486. #include <windows.h>
  487. #include <conio.h>
  488. #include <wchar.h>
  489. ])
  490. fi
  491. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  492. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  493. dnl ------------------------------------------------------
  494. dnl Where do you live, libevent? And how do we call you?
  495. if test "$bwin32" = "true"; then
  496. TOR_LIB_WS32=-lws2_32
  497. TOR_LIB_IPHLPAPI=-liphlpapi
  498. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  499. # think it's actually necessary.
  500. TOR_LIB_GDI=-lgdi32
  501. else
  502. TOR_LIB_WS32=
  503. TOR_LIB_GDI=
  504. fi
  505. AC_SUBST(TOR_LIB_WS32)
  506. AC_SUBST(TOR_LIB_GDI)
  507. AC_SUBST(TOR_LIB_IPHLPAPI)
  508. tor_libevent_pkg_redhat="libevent"
  509. tor_libevent_pkg_debian="libevent-dev"
  510. tor_libevent_devpkg_redhat="libevent-devel"
  511. tor_libevent_devpkg_debian="libevent-dev"
  512. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  513. dnl linking for static builds.
  514. STATIC_LIBEVENT_FLAGS=""
  515. if test "$enable_static_libevent" = "yes"; then
  516. if test "$have_rt" = "yes"; then
  517. STATIC_LIBEVENT_FLAGS=" -lrt "
  518. fi
  519. fi
  520. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  521. #ifdef _WIN32
  522. #include <winsock2.h>
  523. #endif
  524. #include <sys/time.h>
  525. #include <sys/types.h>
  526. #include <event2/event.h>], [
  527. #ifdef _WIN32
  528. #include <winsock2.h>
  529. #endif
  530. struct event_base;
  531. struct event_base *event_base_new(void);],
  532. [
  533. #ifdef _WIN32
  534. {WSADATA d; WSAStartup(0x101,&d); }
  535. #endif
  536. event_base_new();
  537. ], [--with-libevent-dir], [/opt/libevent])
  538. dnl Determine the incantation needed to link libevent.
  539. save_LIBS="$LIBS"
  540. save_LDFLAGS="$LDFLAGS"
  541. save_CPPFLAGS="$CPPFLAGS"
  542. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  543. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  544. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  545. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  546. if test "$enable_static_libevent" = "yes"; then
  547. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  548. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  549. else
  550. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  551. fi
  552. else
  553. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  554. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  555. 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"))
  556. if test "$ac_cv_search_event_new" != "none required"; then
  557. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  558. fi
  559. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  560. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  561. fi
  562. else
  563. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  564. fi
  565. fi
  566. dnl Now check for particular libevent functions.
  567. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  568. evutil_secure_rng_add_bytes \
  569. ])
  570. LIBS="$save_LIBS"
  571. LDFLAGS="$save_LDFLAGS"
  572. CPPFLAGS="$save_CPPFLAGS"
  573. dnl Check that libevent is at least at version 2.0.10, the first stable
  574. dnl release of its series
  575. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  576. AC_MSG_CHECKING([whether Libevent is new enough])
  577. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  578. #include <event2/event.h>
  579. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  580. #error
  581. int x = y(zz);
  582. #else
  583. int x = 1;
  584. #endif
  585. ])], [ AC_MSG_RESULT([yes]) ],
  586. [ AC_MSG_RESULT([no])
  587. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  588. LIBS="$save_LIBS"
  589. LDFLAGS="$save_LDFLAGS"
  590. CPPFLAGS="$save_CPPFLAGS"
  591. AC_SUBST(TOR_LIBEVENT_LIBS)
  592. dnl ------------------------------------------------------
  593. dnl Where do you live, libm?
  594. dnl On some platforms (Haiku/BeOS) the math library is
  595. dnl part of libroot. In which case don't link against lm
  596. TOR_LIB_MATH=""
  597. save_LIBS="$LIBS"
  598. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  599. if test "$ac_cv_search_pow" != "none required"; then
  600. TOR_LIB_MATH="$ac_cv_search_pow"
  601. fi
  602. LIBS="$save_LIBS"
  603. AC_SUBST(TOR_LIB_MATH)
  604. dnl ------------------------------------------------------
  605. dnl Where do you live, openssl? And how do we call you?
  606. tor_openssl_pkg_redhat="openssl"
  607. tor_openssl_pkg_debian="libssl-dev"
  608. tor_openssl_devpkg_redhat="openssl-devel"
  609. tor_openssl_devpkg_debian="libssl-dev"
  610. ALT_openssl_WITHVAL=""
  611. AC_ARG_WITH(ssl-dir,
  612. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  613. [
  614. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  615. ALT_openssl_WITHVAL="$withval"
  616. fi
  617. ])
  618. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  619. [#include <openssl/rand.h>],
  620. [void RAND_add(const void *buf, int num, double entropy);],
  621. [RAND_add((void*)0,0,0);], [],
  622. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  623. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  624. if test "$enable_static_openssl" = "yes"; then
  625. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  626. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  627. else
  628. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  629. fi
  630. else
  631. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  632. fi
  633. AC_SUBST(TOR_OPENSSL_LIBS)
  634. dnl Now check for particular openssl functions.
  635. save_LIBS="$LIBS"
  636. save_LDFLAGS="$LDFLAGS"
  637. save_CPPFLAGS="$CPPFLAGS"
  638. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  639. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  640. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  641. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  642. #include <openssl/opensslv.h>
  643. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  644. #error "too old"
  645. #endif
  646. ]], [[]])],
  647. [ : ],
  648. [ AC_MSG_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  649. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  650. #include <openssl/opensslv.h>
  651. #include <openssl/evp.h>
  652. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  653. #error "no ECC"
  654. #endif
  655. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  656. #error "curves unavailable"
  657. #endif
  658. ]], [[]])],
  659. [ : ],
  660. [ AC_MSG_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  661. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  662. [#include <openssl/ssl.h>
  663. ])
  664. AC_CHECK_FUNCS([ \
  665. SSL_SESSION_get_master_key \
  666. SSL_get_server_random \
  667. SSL_get_client_ciphers \
  668. SSL_get_client_random \
  669. SSL_CIPHER_find \
  670. TLS_method
  671. ])
  672. dnl Check if OpenSSL has scrypt implementation.
  673. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  674. dnl Check if OpenSSL structures are opaque
  675. AC_CHECK_MEMBERS([SSL.state], , ,
  676. [#include <openssl/ssl.h>
  677. ])
  678. LIBS="$save_LIBS"
  679. LDFLAGS="$save_LDFLAGS"
  680. CPPFLAGS="$save_CPPFLAGS"
  681. dnl ------------------------------------------------------
  682. dnl Where do you live, zlib? And how do we call you?
  683. tor_zlib_pkg_redhat="zlib"
  684. tor_zlib_pkg_debian="zlib1g"
  685. tor_zlib_devpkg_redhat="zlib-devel"
  686. tor_zlib_devpkg_debian="zlib1g-dev"
  687. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  688. [#include <zlib.h>],
  689. [const char * zlibVersion(void);],
  690. [zlibVersion();], [--with-zlib-dir],
  691. [/opt/zlib])
  692. if test "$enable_static_zlib" = "yes"; then
  693. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  694. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  695. using --enable-static-zlib")
  696. else
  697. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  698. fi
  699. else
  700. TOR_ZLIB_LIBS="-lz"
  701. fi
  702. AC_SUBST(TOR_ZLIB_LIBS)
  703. dnl ------------------------------------------------------
  704. dnl Where we do we find lzma?
  705. AC_ARG_ENABLE(lzma,
  706. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  707. [case "${enableval}" in
  708. "yes") lzma=true ;;
  709. "no") lzma=false ;;
  710. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  711. esac], [lzma=auto])
  712. if test "x$enable_lzma" = "xno"; then
  713. have_lzma=no;
  714. else
  715. PKG_CHECK_MODULES([LZMA],
  716. [liblzma],
  717. have_lzma=yes,
  718. have_lzma=no)
  719. if test "x$have_lzma" = "xno" ; then
  720. AC_MSG_WARN([Unable to find liblzma.])
  721. fi
  722. fi
  723. if test "x$have_lzma" = "xyes"; then
  724. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  725. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  726. TOR_LZMA_LIBS="${LZMA_LIBS}"
  727. fi
  728. AC_SUBST(TOR_LZMA_CFLAGS)
  729. AC_SUBST(TOR_LZMA_LIBS)
  730. dnl ------------------------------------------------------
  731. dnl Where we do we find zstd?
  732. AC_ARG_ENABLE(zstd,
  733. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  734. [case "${enableval}" in
  735. "yes") zstd=true ;;
  736. "no") zstd=false ;;
  737. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  738. esac], [zstd=auto])
  739. if test "x$enable_zstd" = "xno"; then
  740. have_zstd=no;
  741. else
  742. PKG_CHECK_MODULES([ZSTD],
  743. [libzstd >= 1.1],
  744. have_zstd=yes,
  745. have_zstd=no)
  746. if test "x$have_zstd" = "xno" ; then
  747. AC_MSG_WARN([Unable to find libzstd.])
  748. fi
  749. fi
  750. if test "x$have_zstd" = "xyes"; then
  751. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  752. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  753. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  754. fi
  755. AC_SUBST(TOR_ZSTD_CFLAGS)
  756. AC_SUBST(TOR_ZSTD_LIBS)
  757. dnl ----------------------------------------------------------------------
  758. dnl Check if libcap is available for capabilities.
  759. tor_cap_pkg_debian="libcap2"
  760. tor_cap_pkg_redhat="libcap"
  761. tor_cap_devpkg_debian="libcap-dev"
  762. tor_cap_devpkg_redhat="libcap-devel"
  763. AC_CHECK_LIB([cap], [cap_init], [],
  764. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  765. )
  766. AC_CHECK_FUNCS(cap_set_proc)
  767. dnl ---------------------------------------------------------------------
  768. dnl Now that we know about our major libraries, we can check for compiler
  769. dnl and linker hardening options. We need to do this with the libraries known,
  770. dnl since sometimes the linker will like an option but not be willing to
  771. dnl use it with a build of a library.
  772. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  773. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  774. CFLAGS_FTRAPV=
  775. CFLAGS_FWRAPV=
  776. CFLAGS_ASAN=
  777. CFLAGS_UBSAN=
  778. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  779. #if !defined(__clang__)
  780. #error
  781. #endif])], have_clang=yes, have_clang=no)
  782. if test "x$enable_gcc_hardening" != "xno"; then
  783. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  784. if test "x$have_clang" = "xyes"; then
  785. TOR_CHECK_CFLAGS(-Qunused-arguments)
  786. fi
  787. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  788. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  789. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  790. m4_ifdef([AS_VAR_IF],[
  791. AS_VAR_IF(can_compile, [yes],
  792. AS_VAR_IF(can_link, [yes],
  793. [],
  794. 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.)]))
  795. )])
  796. AS_VAR_POPDEF([can_link])
  797. AS_VAR_POPDEF([can_compile])
  798. TOR_CHECK_CFLAGS(-Wstack-protector)
  799. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  800. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  801. TOR_CHECK_CFLAGS(-fPIE)
  802. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  803. fi
  804. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  805. fi
  806. if test "$fragile_hardening" = "yes"; then
  807. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  808. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  809. 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.])
  810. fi
  811. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  812. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  813. fi
  814. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  815. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  816. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  817. fi
  818. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  819. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  820. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  821. fi
  822. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  823. fi
  824. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  825. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  826. mulodi_fixes_ftrapv=no
  827. if test "$have_clang" = "yes"; then
  828. saved_CFLAGS="$CFLAGS"
  829. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  830. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  831. AC_LINK_IFELSE([
  832. AC_LANG_SOURCE([[
  833. #include <stdint.h>
  834. #include <stdlib.h>
  835. int main(int argc, char **argv)
  836. {
  837. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  838. * (int64_t)atoi(argv[3]);
  839. return x == 9;
  840. } ]])],
  841. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  842. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  843. if test "$ftrapv_can_link" = "no"; then
  844. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  845. AC_LINK_IFELSE([
  846. AC_LANG_SOURCE([[
  847. #include <stdint.h>
  848. #include <stdlib.h>
  849. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  850. *overflow=0;
  851. return a;
  852. }
  853. int main(int argc, char **argv)
  854. {
  855. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  856. * (int64_t)atoi(argv[3]);
  857. return x == 9;
  858. } ]])],
  859. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  860. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  861. fi
  862. CFLAGS="$saved_CFLAGS"
  863. fi
  864. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  865. dnl These cflags add bunches of branches, and we haven't been able to
  866. dnl persuade ourselves that they're suitable for code that needs to be
  867. dnl constant time.
  868. AC_SUBST(CFLAGS_BUGTRAP)
  869. dnl These cflags are variant ones sutable for code that needs to be
  870. dnl constant-time.
  871. AC_SUBST(CFLAGS_CONSTTIME)
  872. if test "x$enable_linker_hardening" != "xno"; then
  873. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  874. fi
  875. # For backtrace support
  876. TOR_CHECK_LDFLAGS(-rdynamic)
  877. dnl ------------------------------------------------------
  878. dnl Now see if we have a -fomit-frame-pointer compiler option.
  879. saved_CFLAGS="$CFLAGS"
  880. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  881. F_OMIT_FRAME_POINTER=''
  882. if test "$saved_CFLAGS" != "$CFLAGS"; then
  883. if test "$fragile_hardening" = "yes"; then
  884. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  885. fi
  886. fi
  887. CFLAGS="$saved_CFLAGS"
  888. AC_SUBST(F_OMIT_FRAME_POINTER)
  889. dnl ------------------------------------------------------
  890. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  891. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  892. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  893. dnl code will work.
  894. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  895. dnl ============================================================
  896. dnl Check for libseccomp
  897. if test "x$enable_seccomp" != "xno"; then
  898. AC_CHECK_HEADERS([seccomp.h])
  899. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  900. fi
  901. dnl ============================================================
  902. dnl Check for libscrypt
  903. if test "x$enable_libscrypt" != "xno"; then
  904. AC_CHECK_HEADERS([libscrypt.h])
  905. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  906. AC_CHECK_FUNCS([libscrypt_scrypt])
  907. fi
  908. dnl ============================================================
  909. dnl We need an implementation of curve25519.
  910. dnl set these defaults.
  911. build_curve25519_donna=no
  912. build_curve25519_donna_c64=no
  913. use_curve25519_donna=no
  914. use_curve25519_nacl=no
  915. CURVE25519_LIBS=
  916. dnl The best choice is using curve25519-donna-c64, but that requires
  917. dnl that we
  918. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  919. tor_cv_can_use_curve25519_donna_c64,
  920. [AC_RUN_IFELSE(
  921. [AC_LANG_PROGRAM([dnl
  922. #include <stdint.h>
  923. typedef unsigned uint128_t __attribute__((mode(TI)));
  924. int func(uint64_t a, uint64_t b) {
  925. uint128_t c = ((uint128_t)a) * b;
  926. int ok = ((uint64_t)(c>>96)) == 522859 &&
  927. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  928. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  929. (((uint64_t)(c))&0xffffffffL) == 0;
  930. return ok;
  931. }
  932. ], [dnl
  933. int ok = func( ((uint64_t)2000000000) * 1000000000,
  934. ((uint64_t)1234567890) << 24);
  935. return !ok;
  936. ])],
  937. [tor_cv_can_use_curve25519_donna_c64=yes],
  938. [tor_cv_can_use_curve25519_donna_c64=no],
  939. [AC_LINK_IFELSE(
  940. [AC_LANG_PROGRAM([dnl
  941. #include <stdint.h>
  942. typedef unsigned uint128_t __attribute__((mode(TI)));
  943. int func(uint64_t a, uint64_t b) {
  944. uint128_t c = ((uint128_t)a) * b;
  945. int ok = ((uint64_t)(c>>96)) == 522859 &&
  946. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  947. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  948. (((uint64_t)(c))&0xffffffffL) == 0;
  949. return ok;
  950. }
  951. ], [dnl
  952. int ok = func( ((uint64_t)2000000000) * 1000000000,
  953. ((uint64_t)1234567890) << 24);
  954. return !ok;
  955. ])],
  956. [tor_cv_can_use_curve25519_donna_c64=cross],
  957. [tor_cv_can_use_curve25519_donna_c64=no])])])
  958. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  959. nacl/crypto_scalarmult_curve25519.h])
  960. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  961. tor_cv_can_use_curve25519_nacl,
  962. [tor_saved_LIBS="$LIBS"
  963. LIBS="$LIBS -lnacl"
  964. AC_LINK_IFELSE(
  965. [AC_LANG_PROGRAM([dnl
  966. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  967. #include <crypto_scalarmult_curve25519.h>
  968. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  969. #include <nacl/crypto_scalarmult_curve25519.h>
  970. #endif
  971. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  972. #error Hey, this is the reference implementation! That's not fast.
  973. #endif
  974. ], [
  975. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  976. ])], [tor_cv_can_use_curve25519_nacl=yes],
  977. [tor_cv_can_use_curve25519_nacl=no])
  978. LIBS="$tor_saved_LIBS" ])
  979. dnl Okay, now we need to figure out which one to actually use. Fall back
  980. dnl to curve25519-donna.c
  981. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  982. build_curve25519_donna_c64=yes
  983. use_curve25519_donna=yes
  984. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  985. use_curve25519_nacl=yes
  986. CURVE25519_LIBS=-lnacl
  987. else
  988. build_curve25519_donna=yes
  989. use_curve25519_donna=yes
  990. fi
  991. if test "x$use_curve25519_donna" = "xyes"; then
  992. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  993. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  994. fi
  995. if test "x$use_curve25519_nacl" = "xyes"; then
  996. AC_DEFINE(USE_CURVE25519_NACL, 1,
  997. [Defined if we should use a curve25519 from nacl])
  998. fi
  999. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1000. test "x$build_curve25519_donna" = "xyes")
  1001. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1002. test "x$build_curve25519_donna_c64" = "xyes")
  1003. AC_SUBST(CURVE25519_LIBS)
  1004. dnl Make sure to enable support for large off_t if available.
  1005. AC_SYS_LARGEFILE
  1006. AC_CHECK_HEADERS([assert.h \
  1007. errno.h \
  1008. fcntl.h \
  1009. signal.h \
  1010. string.h \
  1011. sys/capability.h \
  1012. sys/fcntl.h \
  1013. sys/stat.h \
  1014. sys/time.h \
  1015. sys/types.h \
  1016. time.h \
  1017. unistd.h \
  1018. arpa/inet.h \
  1019. crt_externs.h \
  1020. execinfo.h \
  1021. gnu/libc-version.h \
  1022. grp.h \
  1023. ifaddrs.h \
  1024. inttypes.h \
  1025. limits.h \
  1026. linux/types.h \
  1027. machine/limits.h \
  1028. malloc.h \
  1029. malloc/malloc.h \
  1030. malloc_np.h \
  1031. netdb.h \
  1032. netinet/in.h \
  1033. netinet/in6.h \
  1034. pwd.h \
  1035. readpassphrase.h \
  1036. stdint.h \
  1037. sys/eventfd.h \
  1038. sys/file.h \
  1039. sys/ioctl.h \
  1040. sys/limits.h \
  1041. sys/mman.h \
  1042. sys/param.h \
  1043. sys/prctl.h \
  1044. sys/random.h \
  1045. sys/resource.h \
  1046. sys/select.h \
  1047. sys/socket.h \
  1048. sys/statvfs.h \
  1049. sys/syscall.h \
  1050. sys/sysctl.h \
  1051. sys/syslimits.h \
  1052. sys/time.h \
  1053. sys/types.h \
  1054. sys/un.h \
  1055. sys/utime.h \
  1056. sys/wait.h \
  1057. syslog.h \
  1058. utime.h])
  1059. AC_CHECK_HEADERS(sys/param.h)
  1060. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1061. [#ifdef HAVE_SYS_TYPES_H
  1062. #include <sys/types.h>
  1063. #endif
  1064. #ifdef HAVE_SYS_SOCKET_H
  1065. #include <sys/socket.h>
  1066. #endif])
  1067. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1068. [#ifdef HAVE_SYS_TYPES_H
  1069. #include <sys/types.h>
  1070. #endif
  1071. #ifdef HAVE_SYS_SOCKET_H
  1072. #include <sys/socket.h>
  1073. #endif
  1074. #ifdef HAVE_NET_IF_H
  1075. #include <net/if.h>
  1076. #endif
  1077. #ifdef HAVE_NETINET_IN_H
  1078. #include <netinet/in.h>
  1079. #endif])
  1080. AC_CHECK_HEADERS(linux/if.h,[],[],
  1081. [
  1082. #ifdef HAVE_SYS_SOCKET_H
  1083. #include <sys/socket.h>
  1084. #endif
  1085. ])
  1086. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1087. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1088. [#ifdef HAVE_SYS_TYPES_H
  1089. #include <sys/types.h>
  1090. #endif
  1091. #ifdef HAVE_SYS_SOCKET_H
  1092. #include <sys/socket.h>
  1093. #endif
  1094. #ifdef HAVE_LIMITS_H
  1095. #include <limits.h>
  1096. #endif
  1097. #ifdef HAVE_LINUX_TYPES_H
  1098. #include <linux/types.h>
  1099. #endif
  1100. #ifdef HAVE_NETINET_IN6_H
  1101. #include <netinet/in6.h>
  1102. #endif
  1103. #ifdef HAVE_NETINET_IN_H
  1104. #include <netinet/in.h>
  1105. #endif])
  1106. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1107. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1108. [#ifdef HAVE_SYS_TYPES_H
  1109. #include <sys/types.h>
  1110. #endif
  1111. #ifdef HAVE_SYS_SOCKET_H
  1112. #include <sys/socket.h>
  1113. #endif
  1114. #ifdef HAVE_LIMITS_H
  1115. #include <limits.h>
  1116. #endif
  1117. #ifdef HAVE_LINUX_TYPES_H
  1118. #include <linux/types.h>
  1119. #endif
  1120. #ifdef HAVE_NETINET_IN6_H
  1121. #include <netinet/in6.h>
  1122. #endif
  1123. #ifdef HAVE_NETINET_IN_H
  1124. #include <netinet/in.h>
  1125. #endif
  1126. #ifdef HAVE_LINUX_IF_H
  1127. #include <linux/if.h>
  1128. #endif])
  1129. transparent_ok=0
  1130. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1131. transparent_ok=1
  1132. fi
  1133. if test "x$linux_netfilter_ipv4" = "x1"; then
  1134. transparent_ok=1
  1135. fi
  1136. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1137. transparent_ok=1
  1138. fi
  1139. if test "x$transparent_ok" = "x1"; then
  1140. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1141. else
  1142. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1143. fi
  1144. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1145. [#ifdef HAVE_SYS_TYPES_H
  1146. #include <sys/types.h>
  1147. #endif
  1148. #ifdef HAVE_SYS_TIME_H
  1149. #include <sys/time.h>
  1150. #endif])
  1151. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1152. dnl Watch out.
  1153. AC_CHECK_SIZEOF(int8_t)
  1154. AC_CHECK_SIZEOF(int16_t)
  1155. AC_CHECK_SIZEOF(int32_t)
  1156. AC_CHECK_SIZEOF(int64_t)
  1157. AC_CHECK_SIZEOF(uint8_t)
  1158. AC_CHECK_SIZEOF(uint16_t)
  1159. AC_CHECK_SIZEOF(uint32_t)
  1160. AC_CHECK_SIZEOF(uint64_t)
  1161. AC_CHECK_SIZEOF(intptr_t)
  1162. AC_CHECK_SIZEOF(uintptr_t)
  1163. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1164. AC_CHECK_SIZEOF(char)
  1165. AC_CHECK_SIZEOF(short)
  1166. AC_CHECK_SIZEOF(int)
  1167. AC_CHECK_SIZEOF(long)
  1168. AC_CHECK_SIZEOF(long long)
  1169. AC_CHECK_SIZEOF(__int64)
  1170. AC_CHECK_SIZEOF(void *)
  1171. AC_CHECK_SIZEOF(time_t)
  1172. AC_CHECK_SIZEOF(size_t)
  1173. AC_CHECK_SIZEOF(pid_t)
  1174. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1175. AC_PC_FROM_UCONTEXT([:])
  1176. dnl used to include sockaddr_storage, but everybody has that.
  1177. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1178. [#ifdef HAVE_SYS_TYPES_H
  1179. #include <sys/types.h>
  1180. #endif
  1181. #ifdef HAVE_NETINET_IN_H
  1182. #include <netinet/in.h>
  1183. #endif
  1184. #ifdef HAVE_NETINET_IN6_H
  1185. #include <netinet/in6.h>
  1186. #endif
  1187. #ifdef HAVE_SYS_SOCKET_H
  1188. #include <sys/socket.h>
  1189. #endif
  1190. #ifdef _WIN32
  1191. #define _WIN32_WINNT 0x0501
  1192. #define WIN32_LEAN_AND_MEAN
  1193. #include <winsock2.h>
  1194. #include <ws2tcpip.h>
  1195. #endif
  1196. ])
  1197. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1198. [#ifdef HAVE_SYS_TYPES_H
  1199. #include <sys/types.h>
  1200. #endif
  1201. #ifdef HAVE_NETINET_IN_H
  1202. #include <netinet/in.h>
  1203. #endif
  1204. #ifdef HAVE_NETINET_IN6_H
  1205. #include <netinet/in6.h>
  1206. #endif
  1207. #ifdef HAVE_SYS_SOCKET_H
  1208. #include <sys/socket.h>
  1209. #endif
  1210. #ifdef _WIN32
  1211. #define _WIN32_WINNT 0x0501
  1212. #define WIN32_LEAN_AND_MEAN
  1213. #include <winsock2.h>
  1214. #include <ws2tcpip.h>
  1215. #endif
  1216. ])
  1217. AC_CHECK_TYPES([rlim_t], , ,
  1218. [#ifdef HAVE_SYS_TYPES_H
  1219. #include <sys/types.h>
  1220. #endif
  1221. #ifdef HAVE_SYS_TIME_H
  1222. #include <sys/time.h>
  1223. #endif
  1224. #ifdef HAVE_SYS_RESOURCE_H
  1225. #include <sys/resource.h>
  1226. #endif
  1227. ])
  1228. AX_CHECK_SIGN([time_t],
  1229. [ : ],
  1230. [ : ], [
  1231. #ifdef HAVE_SYS_TYPES_H
  1232. #include <sys/types.h>
  1233. #endif
  1234. #ifdef HAVE_SYS_TIME_H
  1235. #include <sys/time.h>
  1236. #endif
  1237. #ifdef HAVE_TIME_H
  1238. #include <time.h>
  1239. #endif
  1240. ])
  1241. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1242. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1243. fi
  1244. AX_CHECK_SIGN([size_t],
  1245. [ tor_cv_size_t_signed=yes ],
  1246. [ tor_cv_size_t_signed=no ], [
  1247. #ifdef HAVE_SYS_TYPES_H
  1248. #include <sys/types.h>
  1249. #endif
  1250. ])
  1251. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1252. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1253. fi
  1254. AX_CHECK_SIGN([enum always],
  1255. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1256. [ : ], [
  1257. enum always { AAA, BBB, CCC };
  1258. ])
  1259. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1260. #ifdef HAVE_SYS_SOCKET_H
  1261. #include <sys/socket.h>
  1262. #endif
  1263. ])
  1264. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1265. AC_CHECK_SIZEOF(cell_t)
  1266. # Now make sure that NULL can be represented as zero bytes.
  1267. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1268. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1269. [[#include <stdlib.h>
  1270. #include <string.h>
  1271. #include <stdio.h>
  1272. #ifdef HAVE_STDDEF_H
  1273. #include <stddef.h>
  1274. #endif
  1275. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1276. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1277. [tor_cv_null_is_zero=yes],
  1278. [tor_cv_null_is_zero=no],
  1279. [tor_cv_null_is_zero=cross])])
  1280. if test "$tor_cv_null_is_zero" = "cross"; then
  1281. # Cross-compiling; let's hope that the target isn't raving mad.
  1282. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1283. fi
  1284. if test "$tor_cv_null_is_zero" != "no"; then
  1285. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1286. [Define to 1 iff memset(0) sets pointers to NULL])
  1287. fi
  1288. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1289. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1290. [[#include <stdlib.h>
  1291. #include <string.h>
  1292. #include <stdio.h>
  1293. #ifdef HAVE_STDDEF_H
  1294. #include <stddef.h>
  1295. #endif
  1296. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1297. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1298. [tor_cv_dbl0_is_zero=yes],
  1299. [tor_cv_dbl0_is_zero=no],
  1300. [tor_cv_dbl0_is_zero=cross])])
  1301. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1302. # Cross-compiling; let's hope that the target isn't raving mad.
  1303. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1304. fi
  1305. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1306. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1307. [Define to 1 iff memset(0) sets doubles to 0.0])
  1308. fi
  1309. # And what happens when we malloc zero?
  1310. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1311. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1312. [[#include <stdlib.h>
  1313. #include <string.h>
  1314. #include <stdio.h>
  1315. #ifdef HAVE_STDDEF_H
  1316. #include <stddef.h>
  1317. #endif
  1318. int main () { return malloc(0)?0:1; }]])],
  1319. [tor_cv_malloc_zero_works=yes],
  1320. [tor_cv_malloc_zero_works=no],
  1321. [tor_cv_malloc_zero_works=cross])])
  1322. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1323. # Cross-compiling; let's hope that the target isn't raving mad.
  1324. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1325. fi
  1326. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1327. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1328. [Define to 1 iff malloc(0) returns a pointer])
  1329. fi
  1330. # whether we seem to be in a 2s-complement world.
  1331. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1332. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1333. [[int main () { int problem = ((-99) != (~99)+1);
  1334. return problem ? 1 : 0; }]])],
  1335. [tor_cv_twos_complement=yes],
  1336. [tor_cv_twos_complement=no],
  1337. [tor_cv_twos_complement=cross])])
  1338. if test "$tor_cv_twos_complement" = "cross"; then
  1339. # Cross-compiling; let's hope that the target isn't raving mad.
  1340. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1341. fi
  1342. if test "$tor_cv_twos_complement" != "no"; then
  1343. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1344. [Define to 1 iff we represent negative integers with
  1345. two's complement])
  1346. fi
  1347. # What does shifting a negative value do?
  1348. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1349. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1350. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1351. [tor_cv_sign_extend=yes],
  1352. [tor_cv_sign_extend=no],
  1353. [tor_cv_sign_extend=cross])])
  1354. if test "$tor_cv_sign_extend" = "cross"; then
  1355. # Cross-compiling; let's hope that the target isn't raving mad.
  1356. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1357. fi
  1358. if test "$tor_cv_sign_extend" != "no"; then
  1359. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1360. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1361. fi
  1362. # Whether we should use the dmalloc memory allocation debugging library.
  1363. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1364. AC_ARG_WITH(dmalloc,
  1365. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1366. [if [[ "$withval" = "yes" ]]; then
  1367. dmalloc=1
  1368. AC_MSG_RESULT(yes)
  1369. else
  1370. dmalloc=1
  1371. AC_MSG_RESULT(no)
  1372. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1373. )
  1374. if [[ $dmalloc -eq 1 ]]; then
  1375. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1376. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1377. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1378. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1379. fi
  1380. AC_ARG_WITH(tcmalloc,
  1381. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1382. [ tcmalloc=yes ], [ tcmalloc=no ])
  1383. if test "x$tcmalloc" = "xyes"; then
  1384. LDFLAGS="-ltcmalloc $LDFLAGS"
  1385. fi
  1386. using_custom_malloc=no
  1387. if test "x$enable_openbsd_malloc" = "xyes"; then
  1388. using_custom_malloc=yes
  1389. fi
  1390. if test "x$tcmalloc" = "xyes"; then
  1391. using_custom_malloc=yes
  1392. fi
  1393. if test "$using_custom_malloc" = "no"; then
  1394. AC_CHECK_FUNCS(mallinfo)
  1395. fi
  1396. # By default, we're going to assume we don't have mlockall()
  1397. # bionic and other platforms have various broken mlockall subsystems.
  1398. # Some systems don't have a working mlockall, some aren't linkable,
  1399. # and some have it but don't declare it.
  1400. AC_CHECK_FUNCS(mlockall)
  1401. AC_CHECK_DECLS([mlockall], , , [
  1402. #ifdef HAVE_SYS_MMAN_H
  1403. #include <sys/mman.h>
  1404. #endif])
  1405. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1406. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1407. # using macros
  1408. AC_CHECK_DECLS([getpagesize], , , [
  1409. #ifdef HAVE_UNISTD_H
  1410. #include <unistd.h>
  1411. #endif])
  1412. # Allow user to specify an alternate syslog facility
  1413. AC_ARG_WITH(syslog-facility,
  1414. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1415. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1416. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1417. AC_SUBST(LOGFACILITY)
  1418. # Check if we have getresuid and getresgid
  1419. AC_CHECK_FUNCS(getresuid getresgid)
  1420. # Check for gethostbyname_r in all its glorious incompatible versions.
  1421. # (This logic is based on that in Python's configure.in)
  1422. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1423. [Define this if you have any gethostbyname_r()])
  1424. AC_CHECK_FUNC(gethostbyname_r, [
  1425. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1426. OLD_CFLAGS=$CFLAGS
  1427. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1428. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1429. #include <netdb.h>
  1430. ]], [[
  1431. char *cp1, *cp2;
  1432. struct hostent *h1, *h2;
  1433. int i1, i2;
  1434. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1435. ]])],[
  1436. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1437. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1438. [Define this if gethostbyname_r takes 6 arguments])
  1439. AC_MSG_RESULT(6)
  1440. ], [
  1441. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1442. #include <netdb.h>
  1443. ]], [[
  1444. char *cp1, *cp2;
  1445. struct hostent *h1;
  1446. int i1, i2;
  1447. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1448. ]])], [
  1449. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1450. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1451. [Define this if gethostbyname_r takes 5 arguments])
  1452. AC_MSG_RESULT(5)
  1453. ], [
  1454. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1455. #include <netdb.h>
  1456. ]], [[
  1457. char *cp1;
  1458. struct hostent *h1;
  1459. struct hostent_data hd;
  1460. (void) gethostbyname_r(cp1,h1,&hd);
  1461. ]])], [
  1462. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1463. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1464. [Define this if gethostbyname_r takes 3 arguments])
  1465. AC_MSG_RESULT(3)
  1466. ], [
  1467. AC_MSG_RESULT(0)
  1468. ])
  1469. ])
  1470. ])
  1471. CFLAGS=$OLD_CFLAGS
  1472. ])
  1473. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1474. tor_cv_have_func_macro,
  1475. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1476. #include <stdio.h>
  1477. int main(int c, char **v) { puts(__func__); }])],
  1478. tor_cv_have_func_macro=yes,
  1479. tor_cv_have_func_macro=no))
  1480. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1481. tor_cv_have_FUNC_macro,
  1482. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1483. #include <stdio.h>
  1484. int main(int c, char **v) { puts(__FUNC__); }])],
  1485. tor_cv_have_FUNC_macro=yes,
  1486. tor_cv_have_FUNC_macro=no))
  1487. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1488. tor_cv_have_FUNCTION_macro,
  1489. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1490. #include <stdio.h>
  1491. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1492. tor_cv_have_FUNCTION_macro=yes,
  1493. tor_cv_have_FUNCTION_macro=no))
  1494. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1495. tor_cv_have_environ_declared,
  1496. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1497. #ifdef HAVE_UNISTD_H
  1498. #include <unistd.h>
  1499. #endif
  1500. #include <stdlib.h>
  1501. int main(int c, char **v) { char **t = environ; }])],
  1502. tor_cv_have_environ_declared=yes,
  1503. tor_cv_have_environ_declared=no))
  1504. if test "$tor_cv_have_func_macro" = "yes"; then
  1505. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1506. fi
  1507. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1508. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1509. fi
  1510. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1511. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1512. [Defined if the compiler supports __FUNCTION__])
  1513. fi
  1514. if test "$tor_cv_have_environ_declared" = "yes"; then
  1515. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1516. [Defined if we have extern char **environ already declared])
  1517. fi
  1518. # $prefix stores the value of the --prefix command line option, or
  1519. # NONE if the option wasn't set. In the case that it wasn't set, make
  1520. # it be the default, so that we can use it to expand directories now.
  1521. if test "x$prefix" = "xNONE"; then
  1522. prefix=$ac_default_prefix
  1523. fi
  1524. # and similarly for $exec_prefix
  1525. if test "x$exec_prefix" = "xNONE"; then
  1526. exec_prefix=$prefix
  1527. fi
  1528. if test "x$BUILDDIR" = "x"; then
  1529. BUILDDIR=`pwd`
  1530. fi
  1531. AC_SUBST(BUILDDIR)
  1532. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1533. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1534. if test "x$CONFDIR" = "x"; then
  1535. CONFDIR=`eval echo $sysconfdir/tor`
  1536. fi
  1537. AC_SUBST(CONFDIR)
  1538. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1539. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1540. BINDIR=`eval echo $bindir`
  1541. AC_SUBST(BINDIR)
  1542. LOCALSTATEDIR=`eval echo $localstatedir`
  1543. AC_SUBST(LOCALSTATEDIR)
  1544. if test "$bwin32" = "true"; then
  1545. # Test if the linker supports the --nxcompat and --dynamicbase options
  1546. # for Windows
  1547. save_LDFLAGS="$LDFLAGS"
  1548. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1549. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1550. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1551. [AC_MSG_RESULT([yes])]
  1552. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1553. [AC_MSG_RESULT([no])]
  1554. )
  1555. LDFLAGS="$save_LDFLAGS"
  1556. fi
  1557. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1558. # than autoconf's macros like.
  1559. if test "$GCC" = "yes"; then
  1560. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1561. # accident waiting to happen.
  1562. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1563. else
  1564. # Override optimization level for non-gcc compilers
  1565. CFLAGS="$CFLAGS -O"
  1566. enable_gcc_warnings=no
  1567. enable_gcc_warnings_advisory=no
  1568. fi
  1569. # Warnings implies advisory-warnings and -Werror.
  1570. if test "$enable_gcc_warnings" = "yes"; then
  1571. enable_gcc_warnings_advisory=yes
  1572. enable_fatal_warnings=yes
  1573. fi
  1574. # OS X Lion started deprecating the system openssl. Let's just disable
  1575. # all deprecation warnings on OS X. Also, to potentially make the binary
  1576. # a little smaller, let's enable dead_strip.
  1577. case "$host_os" in
  1578. darwin*)
  1579. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1580. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1581. esac
  1582. # Add some more warnings which we use in development but not in the
  1583. # released versions. (Some relevant gcc versions can't handle these.)
  1584. #
  1585. # Note that we have to do this near the end of the autoconf process, or
  1586. # else we may run into problems when these warnings hit on the testing C
  1587. # programs that autoconf wants to build.
  1588. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1589. case "$host" in
  1590. *-*-openbsd* | *-*-bitrig*)
  1591. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1592. # That's fine, except that the headers don't pass -Wredundant-decls.
  1593. # Therefore, let's disable -Wsystem-headers when we're building
  1594. # with maximal warnings on OpenBSD.
  1595. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1596. esac
  1597. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1598. # have it work better.
  1599. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1600. # This warning was added in gcc 4.3, but it appears to generate
  1601. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1602. #CFLAGS="$CFLAGS -Wlogical-op"
  1603. m4_foreach_w([warning_flag], [
  1604. -Waddress
  1605. -Waddress-of-array-temporary
  1606. -Waddress-of-temporary
  1607. -Wambiguous-macro
  1608. -Wanonymous-pack-parens
  1609. -Warc
  1610. -Warc-abi
  1611. -Warc-bridge-casts-disallowed-in-nonarc
  1612. -Warc-maybe-repeated-use-of-weak
  1613. -Warc-performSelector-leaks
  1614. -Warc-repeated-use-of-weak
  1615. -Warray-bounds
  1616. -Warray-bounds-pointer-arithmetic
  1617. -Wasm
  1618. -Wasm-operand-widths
  1619. -Watomic-properties
  1620. -Watomic-property-with-user-defined-accessor
  1621. -Wauto-import
  1622. -Wauto-storage-class
  1623. -Wauto-var-id
  1624. -Wavailability
  1625. -Wbackslash-newline-escape
  1626. -Wbad-array-new-length
  1627. -Wbind-to-temporary-copy
  1628. -Wbitfield-constant-conversion
  1629. -Wbool-conversion
  1630. -Wbool-conversions
  1631. -Wbuiltin-requires-header
  1632. -Wchar-align
  1633. -Wcompare-distinct-pointer-types
  1634. -Wcomplex-component-init
  1635. -Wconditional-type-mismatch
  1636. -Wconfig-macros
  1637. -Wconstant-conversion
  1638. -Wconstant-logical-operand
  1639. -Wconstexpr-not-const
  1640. -Wcustom-atomic-properties
  1641. -Wdangling-field
  1642. -Wdangling-initializer-list
  1643. -Wdate-time
  1644. -Wdelegating-ctor-cycles
  1645. -Wdeprecated-implementations
  1646. -Wdeprecated-register
  1647. -Wdirect-ivar-access
  1648. -Wdiscard-qual
  1649. -Wdistributed-object-modifiers
  1650. -Wdivision-by-zero
  1651. -Wdollar-in-identifier-extension
  1652. -Wdouble-promotion
  1653. -Wduplicate-decl-specifier
  1654. -Wduplicate-enum
  1655. -Wduplicate-method-arg
  1656. -Wduplicate-method-match
  1657. -Wduplicated-cond
  1658. -Wdynamic-class-memaccess
  1659. -Wembedded-directive
  1660. -Wempty-translation-unit
  1661. -Wenum-conversion
  1662. -Wexit-time-destructors
  1663. -Wexplicit-ownership-type
  1664. -Wextern-initializer
  1665. -Wextra
  1666. -Wextra-semi
  1667. -Wextra-tokens
  1668. -Wflexible-array-extensions
  1669. -Wfloat-conversion
  1670. -Wformat-non-iso
  1671. -Wfour-char-constants
  1672. -Wgcc-compat
  1673. -Wglobal-constructors
  1674. -Wgnu-array-member-paren-init
  1675. -Wgnu-designator
  1676. -Wgnu-static-float-init
  1677. -Wheader-guard
  1678. -Wheader-hygiene
  1679. -Widiomatic-parentheses
  1680. -Wignored-attributes
  1681. -Wimplicit-atomic-properties
  1682. -Wimplicit-conversion-floating-point-to-bool
  1683. -Wimplicit-exception-spec-mismatch
  1684. -Wimplicit-fallthrough
  1685. -Wimplicit-fallthrough-per-function
  1686. -Wimplicit-retain-self
  1687. -Wimport-preprocessor-directive-pedantic
  1688. -Wincompatible-library-redeclaration
  1689. -Wincompatible-pointer-types-discards-qualifiers
  1690. -Wincomplete-implementation
  1691. -Wincomplete-module
  1692. -Wincomplete-umbrella
  1693. -Winit-self
  1694. -Wint-conversions
  1695. -Wint-to-void-pointer-cast
  1696. -Winteger-overflow
  1697. -Winvalid-constexpr
  1698. -Winvalid-iboutlet
  1699. -Winvalid-noreturn
  1700. -Winvalid-pp-token
  1701. -Winvalid-source-encoding
  1702. -Winvalid-token-paste
  1703. -Wknr-promoted-parameter
  1704. -Wlanguage-extension-token
  1705. -Wlarge-by-value-copy
  1706. -Wliteral-conversion
  1707. -Wliteral-range
  1708. -Wlocal-type-template-args
  1709. -Wlogical-op
  1710. -Wloop-analysis
  1711. -Wmain-return-type
  1712. -Wmalformed-warning-check
  1713. -Wmethod-signatures
  1714. -Wmicrosoft
  1715. -Wmicrosoft-exists
  1716. -Wmismatched-parameter-types
  1717. -Wmismatched-return-types
  1718. -Wmissing-field-initializers
  1719. -Wmissing-format-attribute
  1720. -Wmissing-noreturn
  1721. -Wmissing-selector-name
  1722. -Wmissing-sysroot
  1723. -Wmissing-variable-declarations
  1724. -Wmodule-conflict
  1725. -Wnested-anon-types
  1726. -Wnewline-eof
  1727. -Wnon-literal-null-conversion
  1728. -Wnon-pod-varargs
  1729. -Wnonportable-cfstrings
  1730. -Wnormalized=id
  1731. -Wnull-arithmetic
  1732. -Wnull-character
  1733. -Wnull-conversion
  1734. -Wnull-dereference
  1735. -Wout-of-line-declaration
  1736. -Wover-aligned
  1737. -Woverlength-strings
  1738. -Woverride-init
  1739. -Woverriding-method-mismatch
  1740. -Wpointer-type-mismatch
  1741. -Wpredefined-identifier-outside-function
  1742. -Wprotocol-property-synthesis-ambiguity
  1743. -Wreadonly-iboutlet-property
  1744. -Wreadonly-setter-attrs
  1745. -Wreceiver-expr
  1746. -Wreceiver-forward-class
  1747. -Wreceiver-is-weak
  1748. -Wreinterpret-base-class
  1749. -Wrequires-super-attribute
  1750. -Wreserved-user-defined-literal
  1751. -Wreturn-stack-address
  1752. -Wsection
  1753. -Wselector-type-mismatch
  1754. -Wsentinel
  1755. -Wserialized-diagnostics
  1756. -Wshadow
  1757. -Wshift-count-negative
  1758. -Wshift-count-overflow
  1759. -Wshift-negative-value
  1760. -Wshift-overflow=2
  1761. -Wshift-sign-overflow
  1762. -Wshorten-64-to-32
  1763. -Wsizeof-array-argument
  1764. -Wsource-uses-openmp
  1765. -Wstatic-float-init
  1766. -Wstatic-in-inline
  1767. -Wstatic-local-in-inline
  1768. -Wstrict-overflow=1
  1769. -Wstring-compare
  1770. -Wstring-conversion
  1771. -Wstrlcpy-strlcat-size
  1772. -Wstrncat-size
  1773. -Wsuggest-attribute=format
  1774. -Wsuggest-attribute=noreturn
  1775. -Wsuper-class-method-mismatch
  1776. -Wswitch-bool
  1777. -Wsync-nand
  1778. -Wtautological-constant-out-of-range-compare
  1779. -Wtentative-definition-incomplete-type
  1780. -Wtrampolines
  1781. -Wtype-safety
  1782. -Wtypedef-redefinition
  1783. -Wtypename-missing
  1784. -Wundefined-inline
  1785. -Wundefined-internal
  1786. -Wundefined-reinterpret-cast
  1787. -Wunicode
  1788. -Wunicode-whitespace
  1789. -Wunknown-warning-option
  1790. -Wunnamed-type-template-args
  1791. -Wunneeded-member-function
  1792. -Wunsequenced
  1793. -Wunsupported-visibility
  1794. -Wunused-but-set-parameter
  1795. -Wunused-but-set-variable
  1796. -Wunused-command-line-argument
  1797. -Wunused-const-variable=2
  1798. -Wunused-exception-parameter
  1799. -Wunused-local-typedefs
  1800. -Wunused-member-function
  1801. -Wunused-sanitize-argument
  1802. -Wunused-volatile-lvalue
  1803. -Wuser-defined-literals
  1804. -Wvariadic-macros
  1805. -Wvector-conversion
  1806. -Wvector-conversions
  1807. -Wvexing-parse
  1808. -Wvisibility
  1809. -Wvla-extension
  1810. -Wzero-length-array
  1811. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1812. dnl We should re-enable this in some later version. Clang doesn't
  1813. dnl mind, but it causes trouble with GCC.
  1814. dnl -Wstrict-overflow=2
  1815. dnl These seem to require annotations that we don't currently use,
  1816. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1817. dnl -Wthread-safety
  1818. dnl -Wthread-safety-analysis
  1819. dnl -Wthread-safety-attributes
  1820. dnl -Wthread-safety-beta
  1821. dnl -Wthread-safety-precise
  1822. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1823. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1824. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1825. CFLAGS="$CFLAGS -Wwrite-strings"
  1826. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1827. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1828. CFLAGS="$CFLAGS -Wunused-parameter "
  1829. # These interfere with building main() { return 0; }, which autoconf
  1830. # likes to use as its default program.
  1831. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1832. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1833. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1834. fi
  1835. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1836. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1837. fi
  1838. if test "x$enable_fatal_warnings" = "xyes"; then
  1839. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1840. # default autoconf programs are full of errors.
  1841. CFLAGS="$CFLAGS -Werror"
  1842. fi
  1843. fi
  1844. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1845. case "$host_os" in
  1846. darwin*)
  1847. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1848. esac
  1849. fi
  1850. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1851. AC_CONFIG_FILES([
  1852. Doxyfile
  1853. Makefile
  1854. contrib/dist/suse/tor.sh
  1855. contrib/operator-tools/tor.logrotate
  1856. contrib/dist/tor.sh
  1857. contrib/dist/torctl
  1858. contrib/dist/tor.service
  1859. src/config/torrc.sample
  1860. src/config/torrc.minimal
  1861. src/rust/.cargo/config
  1862. scripts/maint/checkOptionDocs.pl
  1863. scripts/maint/updateVersions.pl
  1864. ])
  1865. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1866. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1867. for file in $regular_mans ; do
  1868. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1869. echo "==================================";
  1870. echo;
  1871. echo "Building Tor has failed since manpages cannot be built.";
  1872. echo;
  1873. echo "You need asciidoc installed to be able to build the manpages.";
  1874. echo "To build without manpages, use the --disable-asciidoc argument";
  1875. echo "when calling configure.";
  1876. echo;
  1877. echo "==================================";
  1878. exit 1;
  1879. fi
  1880. done
  1881. fi
  1882. if test "$fragile_hardening" = "yes"; then
  1883. AC_MSG_WARN([
  1884. ============
  1885. Warning! Building Tor with --enable-fragile-hardening (also known as
  1886. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  1887. other kinds of attacks easier. A Tor instance build with this option will be
  1888. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  1889. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  1890. denial of service attacks. For more information, see
  1891. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  1892. ============
  1893. ])
  1894. fi
  1895. AC_OUTPUT