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],[0.3.1.3-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_USE_SYSTEM_EXTENSIONS
  16. AC_CANONICAL_HOST
  17. PKG_PROG_PKG_CONFIG
  18. if test -f "/etc/redhat-release"; then
  19. if test -f "/usr/kerberos/include"; then
  20. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  21. fi
  22. fi
  23. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  24. # the += operator on it in src/or/Makefile.am
  25. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  28. AC_ARG_ENABLE(static-openssl,
  29. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  30. AC_ARG_ENABLE(static-libevent,
  31. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  32. AC_ARG_ENABLE(static-zlib,
  33. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  34. AC_ARG_ENABLE(static-tor,
  35. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  36. AC_ARG_ENABLE(unittests,
  37. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  38. AC_ARG_ENABLE(coverage,
  39. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  40. AC_ARG_ENABLE(asserts-in-tests,
  41. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  42. AC_ARG_ENABLE(system-torrc,
  43. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  44. AC_ARG_ENABLE(libfuzzer,
  45. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  46. AC_ARG_ENABLE(oss-fuzz,
  47. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  48. 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 "$bwin32" = "false")
  403. AC_CHECK_FUNCS(
  404. _NSGetEnviron \
  405. RtlSecureZeroMemory \
  406. SecureZeroMemory \
  407. accept4 \
  408. backtrace \
  409. backtrace_symbols_fd \
  410. eventfd \
  411. explicit_bzero \
  412. timingsafe_memcmp \
  413. flock \
  414. ftime \
  415. getaddrinfo \
  416. getifaddrs \
  417. getpass \
  418. getrlimit \
  419. gettimeofday \
  420. gmtime_r \
  421. htonll \
  422. inet_aton \
  423. ioctl \
  424. issetugid \
  425. llround \
  426. localtime_r \
  427. lround \
  428. memmem \
  429. memset_s \
  430. pipe \
  431. pipe2 \
  432. prctl \
  433. readpassphrase \
  434. rint \
  435. sigaction \
  436. socketpair \
  437. statvfs \
  438. strlcat \
  439. strlcpy \
  440. strnlen \
  441. strptime \
  442. strtok_r \
  443. strtoull \
  444. sysconf \
  445. sysctl \
  446. truncate \
  447. uname \
  448. usleep \
  449. vasprintf \
  450. _vscprintf
  451. )
  452. # Apple messed up when they added two functions functions in Sierra: they
  453. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  454. # checks. So we should only probe for those functions if we are sure that we
  455. # are not targetting OSX 10.11 or earlier.
  456. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  457. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  458. #ifdef __APPLE__
  459. # include <AvailabilityMacros.h>
  460. # ifndef MAC_OS_X_VERSION_10_12
  461. # define MAC_OS_X_VERSION_10_12 101200
  462. # endif
  463. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  464. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  465. # error "Running on Mac OSX 10.11 or earlier"
  466. # endif
  467. # endif
  468. #endif
  469. ]], [[]])],
  470. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  471. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  472. if test "$on_macos_pre_10_12" = "no"; then
  473. AC_CHECK_FUNCS(
  474. clock_gettime \
  475. getentropy \
  476. )
  477. fi
  478. if test "$bwin32" != "true"; then
  479. AC_CHECK_HEADERS(pthread.h)
  480. AC_CHECK_FUNCS(pthread_create)
  481. AC_CHECK_FUNCS(pthread_condattr_setclock)
  482. fi
  483. if test "$bwin32" = "true"; then
  484. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  485. #include <windows.h>
  486. #include <conio.h>
  487. #include <wchar.h>
  488. ])
  489. fi
  490. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  491. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  492. dnl ------------------------------------------------------
  493. dnl Where do you live, libevent? And how do we call you?
  494. if test "$bwin32" = "true"; then
  495. TOR_LIB_WS32=-lws2_32
  496. TOR_LIB_IPHLPAPI=-liphlpapi
  497. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  498. # think it's actually necessary.
  499. TOR_LIB_GDI=-lgdi32
  500. else
  501. TOR_LIB_WS32=
  502. TOR_LIB_GDI=
  503. fi
  504. AC_SUBST(TOR_LIB_WS32)
  505. AC_SUBST(TOR_LIB_GDI)
  506. AC_SUBST(TOR_LIB_IPHLPAPI)
  507. tor_libevent_pkg_redhat="libevent"
  508. tor_libevent_pkg_debian="libevent-dev"
  509. tor_libevent_devpkg_redhat="libevent-devel"
  510. tor_libevent_devpkg_debian="libevent-dev"
  511. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  512. dnl linking for static builds.
  513. STATIC_LIBEVENT_FLAGS=""
  514. if test "$enable_static_libevent" = "yes"; then
  515. if test "$have_rt" = "yes"; then
  516. STATIC_LIBEVENT_FLAGS=" -lrt "
  517. fi
  518. fi
  519. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  520. #ifdef _WIN32
  521. #include <winsock2.h>
  522. #endif
  523. #include <sys/time.h>
  524. #include <sys/types.h>
  525. #include <event2/event.h>], [
  526. #ifdef _WIN32
  527. #include <winsock2.h>
  528. #endif
  529. struct event_base;
  530. struct event_base *event_base_new(void);],
  531. [
  532. #ifdef _WIN32
  533. {WSADATA d; WSAStartup(0x101,&d); }
  534. #endif
  535. event_base_new();
  536. ], [--with-libevent-dir], [/opt/libevent])
  537. dnl Determine the incantation needed to link libevent.
  538. save_LIBS="$LIBS"
  539. save_LDFLAGS="$LDFLAGS"
  540. save_CPPFLAGS="$CPPFLAGS"
  541. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  542. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  543. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  544. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  545. if test "$enable_static_libevent" = "yes"; then
  546. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  547. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  548. else
  549. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  550. fi
  551. else
  552. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  553. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  554. 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"))
  555. if test "$ac_cv_search_event_new" != "none required"; then
  556. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  557. fi
  558. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  559. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  560. fi
  561. else
  562. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  563. fi
  564. fi
  565. dnl Now check for particular libevent functions.
  566. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  567. evutil_secure_rng_add_bytes \
  568. ])
  569. LIBS="$save_LIBS"
  570. LDFLAGS="$save_LDFLAGS"
  571. CPPFLAGS="$save_CPPFLAGS"
  572. dnl Check that libevent is at least at version 2.0.10, the first stable
  573. dnl release of its series
  574. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  575. AC_MSG_CHECKING([whether Libevent is new enough])
  576. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  577. #include <event2/event.h>
  578. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  579. #error
  580. int x = y(zz);
  581. #else
  582. int x = 1;
  583. #endif
  584. ])], [ AC_MSG_RESULT([yes]) ],
  585. [ AC_MSG_RESULT([no])
  586. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  587. LIBS="$save_LIBS"
  588. LDFLAGS="$save_LDFLAGS"
  589. CPPFLAGS="$save_CPPFLAGS"
  590. AC_SUBST(TOR_LIBEVENT_LIBS)
  591. dnl ------------------------------------------------------
  592. dnl Where do you live, libm?
  593. dnl On some platforms (Haiku/BeOS) the math library is
  594. dnl part of libroot. In which case don't link against lm
  595. TOR_LIB_MATH=""
  596. save_LIBS="$LIBS"
  597. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  598. if test "$ac_cv_search_pow" != "none required"; then
  599. TOR_LIB_MATH="$ac_cv_search_pow"
  600. fi
  601. LIBS="$save_LIBS"
  602. AC_SUBST(TOR_LIB_MATH)
  603. dnl ------------------------------------------------------
  604. dnl Where do you live, openssl? And how do we call you?
  605. tor_openssl_pkg_redhat="openssl"
  606. tor_openssl_pkg_debian="libssl-dev"
  607. tor_openssl_devpkg_redhat="openssl-devel"
  608. tor_openssl_devpkg_debian="libssl-dev"
  609. ALT_openssl_WITHVAL=""
  610. AC_ARG_WITH(ssl-dir,
  611. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  612. [
  613. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  614. ALT_openssl_WITHVAL="$withval"
  615. fi
  616. ])
  617. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  618. [#include <openssl/rand.h>],
  619. [void RAND_add(const void *buf, int num, double entropy);],
  620. [RAND_add((void*)0,0,0);], [],
  621. [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  622. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  623. if test "$enable_static_openssl" = "yes"; then
  624. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  625. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  626. else
  627. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  628. fi
  629. else
  630. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  631. fi
  632. AC_SUBST(TOR_OPENSSL_LIBS)
  633. dnl Now check for particular openssl functions.
  634. save_LIBS="$LIBS"
  635. save_LDFLAGS="$LDFLAGS"
  636. save_CPPFLAGS="$CPPFLAGS"
  637. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  638. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  639. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  640. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  641. #include <openssl/opensslv.h>
  642. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  643. #error "too old"
  644. #endif
  645. ]], [[]])],
  646. [ : ],
  647. [ AC_MSG_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
  648. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  649. #include <openssl/opensslv.h>
  650. #include <openssl/evp.h>
  651. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  652. #error "no ECC"
  653. #endif
  654. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  655. #error "curves unavailable"
  656. #endif
  657. ]], [[]])],
  658. [ : ],
  659. [ AC_MSG_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
  660. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  661. [#include <openssl/ssl.h>
  662. ])
  663. AC_CHECK_FUNCS([ \
  664. SSL_SESSION_get_master_key \
  665. SSL_get_server_random \
  666. SSL_get_client_ciphers \
  667. SSL_get_client_random \
  668. SSL_CIPHER_find \
  669. TLS_method
  670. ])
  671. dnl Check if OpenSSL has scrypt implementation.
  672. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  673. dnl Check if OpenSSL structures are opaque
  674. AC_CHECK_MEMBERS([SSL.state], , ,
  675. [#include <openssl/ssl.h>
  676. ])
  677. LIBS="$save_LIBS"
  678. LDFLAGS="$save_LDFLAGS"
  679. CPPFLAGS="$save_CPPFLAGS"
  680. dnl ------------------------------------------------------
  681. dnl Where do you live, zlib? And how do we call you?
  682. tor_zlib_pkg_redhat="zlib"
  683. tor_zlib_pkg_debian="zlib1g"
  684. tor_zlib_devpkg_redhat="zlib-devel"
  685. tor_zlib_devpkg_debian="zlib1g-dev"
  686. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  687. [#include <zlib.h>],
  688. [const char * zlibVersion(void);],
  689. [zlibVersion();], [--with-zlib-dir],
  690. [/opt/zlib])
  691. if test "$enable_static_zlib" = "yes"; then
  692. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  693. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  694. using --enable-static-zlib")
  695. else
  696. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  697. fi
  698. else
  699. TOR_ZLIB_LIBS="-lz"
  700. fi
  701. AC_SUBST(TOR_ZLIB_LIBS)
  702. dnl ------------------------------------------------------
  703. dnl Where we do we find lzma?
  704. AC_ARG_ENABLE(lzma,
  705. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  706. [case "${enableval}" in
  707. "yes") lzma=true ;;
  708. "no") lzma=false ;;
  709. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  710. esac], [lzma=auto])
  711. if test "x$enable_lzma" = "xno"; then
  712. have_lzma=no;
  713. else
  714. PKG_CHECK_MODULES([LZMA],
  715. [liblzma],
  716. have_lzma=yes,
  717. have_lzma=no)
  718. if test "x$have_lzma" = "xno" ; then
  719. AC_MSG_WARN([Unable to find liblzma.])
  720. fi
  721. fi
  722. if test "x$have_lzma" = "xyes"; then
  723. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  724. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  725. TOR_LZMA_LIBS="${LZMA_LIBS}"
  726. fi
  727. AC_SUBST(TOR_LZMA_CFLAGS)
  728. AC_SUBST(TOR_LZMA_LIBS)
  729. dnl ------------------------------------------------------
  730. dnl Where we do we find zstd?
  731. AC_ARG_ENABLE(zstd,
  732. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  733. [case "${enableval}" in
  734. "yes") zstd=true ;;
  735. "no") zstd=false ;;
  736. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  737. esac], [zstd=auto])
  738. if test "x$enable_zstd" = "xno"; then
  739. have_zstd=no;
  740. else
  741. PKG_CHECK_MODULES([ZSTD],
  742. [libzstd >= 1.1],
  743. have_zstd=yes,
  744. have_zstd=no)
  745. if test "x$have_zstd" = "xno" ; then
  746. AC_MSG_WARN([Unable to find libzstd.])
  747. fi
  748. fi
  749. if test "x$have_zstd" = "xyes"; then
  750. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  751. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  752. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  753. fi
  754. AC_SUBST(TOR_ZSTD_CFLAGS)
  755. AC_SUBST(TOR_ZSTD_LIBS)
  756. dnl ----------------------------------------------------------------------
  757. dnl Check if libcap is available for capabilities.
  758. tor_cap_pkg_debian="libcap2"
  759. tor_cap_pkg_redhat="libcap"
  760. tor_cap_devpkg_debian="libcap-dev"
  761. tor_cap_devpkg_redhat="libcap-devel"
  762. AC_CHECK_LIB([cap], [cap_init], [],
  763. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  764. )
  765. AC_CHECK_FUNCS(cap_set_proc)
  766. dnl ---------------------------------------------------------------------
  767. dnl Now that we know about our major libraries, we can check for compiler
  768. dnl and linker hardening options. We need to do this with the libraries known,
  769. dnl since sometimes the linker will like an option but not be willing to
  770. dnl use it with a build of a library.
  771. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  772. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
  773. CFLAGS_FTRAPV=
  774. CFLAGS_FWRAPV=
  775. CFLAGS_ASAN=
  776. CFLAGS_UBSAN=
  777. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  778. #if !defined(__clang__)
  779. #error
  780. #endif])], have_clang=yes, have_clang=no)
  781. if test "x$enable_gcc_hardening" != "xno"; then
  782. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  783. if test "x$have_clang" = "xyes"; then
  784. TOR_CHECK_CFLAGS(-Qunused-arguments)
  785. fi
  786. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  787. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  788. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  789. m4_ifdef([AS_VAR_IF],[
  790. AS_VAR_IF(can_compile, [yes],
  791. AS_VAR_IF(can_link, [yes],
  792. [],
  793. 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.)]))
  794. )])
  795. AS_VAR_POPDEF([can_link])
  796. AS_VAR_POPDEF([can_compile])
  797. TOR_CHECK_CFLAGS(-Wstack-protector)
  798. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  799. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  800. TOR_CHECK_CFLAGS(-fPIE)
  801. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  802. fi
  803. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  804. fi
  805. if test "$fragile_hardening" = "yes"; then
  806. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  807. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  808. 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.])
  809. fi
  810. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  811. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  812. fi
  813. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  814. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  815. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  816. fi
  817. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  818. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  819. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  820. fi
  821. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  822. fi
  823. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  824. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  825. mulodi_fixes_ftrapv=no
  826. if test "$have_clang" = "yes"; then
  827. saved_CFLAGS="$CFLAGS"
  828. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  829. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  830. AC_LINK_IFELSE([
  831. AC_LANG_SOURCE([[
  832. #include <stdint.h>
  833. #include <stdlib.h>
  834. int main(int argc, char **argv)
  835. {
  836. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  837. * (int64_t)atoi(argv[3]);
  838. return x == 9;
  839. } ]])],
  840. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  841. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  842. if test "$ftrapv_can_link" = "no"; then
  843. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  844. AC_LINK_IFELSE([
  845. AC_LANG_SOURCE([[
  846. #include <stdint.h>
  847. #include <stdlib.h>
  848. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  849. *overflow=0;
  850. return a;
  851. }
  852. int main(int argc, char **argv)
  853. {
  854. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  855. * (int64_t)atoi(argv[3]);
  856. return x == 9;
  857. } ]])],
  858. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  859. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  860. fi
  861. CFLAGS="$saved_CFLAGS"
  862. fi
  863. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  864. dnl These cflags add bunches of branches, and we haven't been able to
  865. dnl persuade ourselves that they're suitable for code that needs to be
  866. dnl constant time.
  867. AC_SUBST(CFLAGS_BUGTRAP)
  868. dnl These cflags are variant ones sutable for code that needs to be
  869. dnl constant-time.
  870. AC_SUBST(CFLAGS_CONSTTIME)
  871. if test "x$enable_linker_hardening" != "xno"; then
  872. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  873. fi
  874. # For backtrace support
  875. TOR_CHECK_LDFLAGS(-rdynamic)
  876. dnl ------------------------------------------------------
  877. dnl Now see if we have a -fomit-frame-pointer compiler option.
  878. saved_CFLAGS="$CFLAGS"
  879. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  880. F_OMIT_FRAME_POINTER=''
  881. if test "$saved_CFLAGS" != "$CFLAGS"; then
  882. if test "$fragile_hardening" = "yes"; then
  883. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  884. fi
  885. fi
  886. CFLAGS="$saved_CFLAGS"
  887. AC_SUBST(F_OMIT_FRAME_POINTER)
  888. dnl ------------------------------------------------------
  889. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  890. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  891. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  892. dnl code will work.
  893. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  894. dnl ============================================================
  895. dnl Check for libseccomp
  896. if test "x$enable_seccomp" != "xno"; then
  897. AC_CHECK_HEADERS([seccomp.h])
  898. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  899. fi
  900. dnl ============================================================
  901. dnl Check for libscrypt
  902. if test "x$enable_libscrypt" != "xno"; then
  903. AC_CHECK_HEADERS([libscrypt.h])
  904. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  905. AC_CHECK_FUNCS([libscrypt_scrypt])
  906. fi
  907. dnl ============================================================
  908. dnl We need an implementation of curve25519.
  909. dnl set these defaults.
  910. build_curve25519_donna=no
  911. build_curve25519_donna_c64=no
  912. use_curve25519_donna=no
  913. use_curve25519_nacl=no
  914. CURVE25519_LIBS=
  915. dnl The best choice is using curve25519-donna-c64, but that requires
  916. dnl that we
  917. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  918. tor_cv_can_use_curve25519_donna_c64,
  919. [AC_RUN_IFELSE(
  920. [AC_LANG_PROGRAM([dnl
  921. #include <stdint.h>
  922. typedef unsigned uint128_t __attribute__((mode(TI)));
  923. int func(uint64_t a, uint64_t b) {
  924. uint128_t c = ((uint128_t)a) * b;
  925. int ok = ((uint64_t)(c>>96)) == 522859 &&
  926. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  927. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  928. (((uint64_t)(c))&0xffffffffL) == 0;
  929. return ok;
  930. }
  931. ], [dnl
  932. int ok = func( ((uint64_t)2000000000) * 1000000000,
  933. ((uint64_t)1234567890) << 24);
  934. return !ok;
  935. ])],
  936. [tor_cv_can_use_curve25519_donna_c64=yes],
  937. [tor_cv_can_use_curve25519_donna_c64=no],
  938. [AC_LINK_IFELSE(
  939. [AC_LANG_PROGRAM([dnl
  940. #include <stdint.h>
  941. typedef unsigned uint128_t __attribute__((mode(TI)));
  942. int func(uint64_t a, uint64_t b) {
  943. uint128_t c = ((uint128_t)a) * b;
  944. int ok = ((uint64_t)(c>>96)) == 522859 &&
  945. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  946. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  947. (((uint64_t)(c))&0xffffffffL) == 0;
  948. return ok;
  949. }
  950. ], [dnl
  951. int ok = func( ((uint64_t)2000000000) * 1000000000,
  952. ((uint64_t)1234567890) << 24);
  953. return !ok;
  954. ])],
  955. [tor_cv_can_use_curve25519_donna_c64=cross],
  956. [tor_cv_can_use_curve25519_donna_c64=no])])])
  957. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  958. nacl/crypto_scalarmult_curve25519.h])
  959. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  960. tor_cv_can_use_curve25519_nacl,
  961. [tor_saved_LIBS="$LIBS"
  962. LIBS="$LIBS -lnacl"
  963. AC_LINK_IFELSE(
  964. [AC_LANG_PROGRAM([dnl
  965. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  966. #include <crypto_scalarmult_curve25519.h>
  967. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  968. #include <nacl/crypto_scalarmult_curve25519.h>
  969. #endif
  970. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  971. #error Hey, this is the reference implementation! That's not fast.
  972. #endif
  973. ], [
  974. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  975. ])], [tor_cv_can_use_curve25519_nacl=yes],
  976. [tor_cv_can_use_curve25519_nacl=no])
  977. LIBS="$tor_saved_LIBS" ])
  978. dnl Okay, now we need to figure out which one to actually use. Fall back
  979. dnl to curve25519-donna.c
  980. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  981. build_curve25519_donna_c64=yes
  982. use_curve25519_donna=yes
  983. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  984. use_curve25519_nacl=yes
  985. CURVE25519_LIBS=-lnacl
  986. else
  987. build_curve25519_donna=yes
  988. use_curve25519_donna=yes
  989. fi
  990. if test "x$use_curve25519_donna" = "xyes"; then
  991. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  992. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  993. fi
  994. if test "x$use_curve25519_nacl" = "xyes"; then
  995. AC_DEFINE(USE_CURVE25519_NACL, 1,
  996. [Defined if we should use a curve25519 from nacl])
  997. fi
  998. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  999. test "x$build_curve25519_donna" = "xyes")
  1000. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1001. test "x$build_curve25519_donna_c64" = "xyes")
  1002. AC_SUBST(CURVE25519_LIBS)
  1003. dnl Make sure to enable support for large off_t if available.
  1004. AC_SYS_LARGEFILE
  1005. AC_CHECK_HEADERS([assert.h \
  1006. errno.h \
  1007. fcntl.h \
  1008. signal.h \
  1009. string.h \
  1010. sys/capability.h \
  1011. sys/fcntl.h \
  1012. sys/stat.h \
  1013. sys/time.h \
  1014. sys/types.h \
  1015. time.h \
  1016. unistd.h \
  1017. arpa/inet.h \
  1018. crt_externs.h \
  1019. execinfo.h \
  1020. grp.h \
  1021. ifaddrs.h \
  1022. inttypes.h \
  1023. limits.h \
  1024. linux/types.h \
  1025. machine/limits.h \
  1026. malloc.h \
  1027. malloc/malloc.h \
  1028. malloc_np.h \
  1029. netdb.h \
  1030. netinet/in.h \
  1031. netinet/in6.h \
  1032. pwd.h \
  1033. readpassphrase.h \
  1034. stdint.h \
  1035. sys/eventfd.h \
  1036. sys/file.h \
  1037. sys/ioctl.h \
  1038. sys/limits.h \
  1039. sys/mman.h \
  1040. sys/param.h \
  1041. sys/prctl.h \
  1042. sys/random.h \
  1043. sys/resource.h \
  1044. sys/select.h \
  1045. sys/socket.h \
  1046. sys/statvfs.h \
  1047. sys/syscall.h \
  1048. sys/sysctl.h \
  1049. sys/syslimits.h \
  1050. sys/time.h \
  1051. sys/types.h \
  1052. sys/un.h \
  1053. sys/utime.h \
  1054. sys/wait.h \
  1055. syslog.h \
  1056. utime.h])
  1057. AC_CHECK_HEADERS(sys/param.h)
  1058. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1059. [#ifdef HAVE_SYS_TYPES_H
  1060. #include <sys/types.h>
  1061. #endif
  1062. #ifdef HAVE_SYS_SOCKET_H
  1063. #include <sys/socket.h>
  1064. #endif])
  1065. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1066. [#ifdef HAVE_SYS_TYPES_H
  1067. #include <sys/types.h>
  1068. #endif
  1069. #ifdef HAVE_SYS_SOCKET_H
  1070. #include <sys/socket.h>
  1071. #endif
  1072. #ifdef HAVE_NET_IF_H
  1073. #include <net/if.h>
  1074. #endif
  1075. #ifdef HAVE_NETINET_IN_H
  1076. #include <netinet/in.h>
  1077. #endif])
  1078. AC_CHECK_HEADERS(linux/if.h,[],[],
  1079. [
  1080. #ifdef HAVE_SYS_SOCKET_H
  1081. #include <sys/socket.h>
  1082. #endif
  1083. ])
  1084. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1085. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1086. [#ifdef HAVE_SYS_TYPES_H
  1087. #include <sys/types.h>
  1088. #endif
  1089. #ifdef HAVE_SYS_SOCKET_H
  1090. #include <sys/socket.h>
  1091. #endif
  1092. #ifdef HAVE_LIMITS_H
  1093. #include <limits.h>
  1094. #endif
  1095. #ifdef HAVE_LINUX_TYPES_H
  1096. #include <linux/types.h>
  1097. #endif
  1098. #ifdef HAVE_NETINET_IN6_H
  1099. #include <netinet/in6.h>
  1100. #endif
  1101. #ifdef HAVE_NETINET_IN_H
  1102. #include <netinet/in.h>
  1103. #endif])
  1104. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1105. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1106. [#ifdef HAVE_SYS_TYPES_H
  1107. #include <sys/types.h>
  1108. #endif
  1109. #ifdef HAVE_SYS_SOCKET_H
  1110. #include <sys/socket.h>
  1111. #endif
  1112. #ifdef HAVE_LIMITS_H
  1113. #include <limits.h>
  1114. #endif
  1115. #ifdef HAVE_LINUX_TYPES_H
  1116. #include <linux/types.h>
  1117. #endif
  1118. #ifdef HAVE_NETINET_IN6_H
  1119. #include <netinet/in6.h>
  1120. #endif
  1121. #ifdef HAVE_NETINET_IN_H
  1122. #include <netinet/in.h>
  1123. #endif
  1124. #ifdef HAVE_LINUX_IF_H
  1125. #include <linux/if.h>
  1126. #endif])
  1127. transparent_ok=0
  1128. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1129. transparent_ok=1
  1130. fi
  1131. if test "x$linux_netfilter_ipv4" = "x1"; then
  1132. transparent_ok=1
  1133. fi
  1134. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1135. transparent_ok=1
  1136. fi
  1137. if test "x$transparent_ok" = "x1"; then
  1138. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1139. else
  1140. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1141. fi
  1142. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1143. [#ifdef HAVE_SYS_TYPES_H
  1144. #include <sys/types.h>
  1145. #endif
  1146. #ifdef HAVE_SYS_TIME_H
  1147. #include <sys/time.h>
  1148. #endif])
  1149. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1150. dnl Watch out.
  1151. AC_CHECK_SIZEOF(int8_t)
  1152. AC_CHECK_SIZEOF(int16_t)
  1153. AC_CHECK_SIZEOF(int32_t)
  1154. AC_CHECK_SIZEOF(int64_t)
  1155. AC_CHECK_SIZEOF(uint8_t)
  1156. AC_CHECK_SIZEOF(uint16_t)
  1157. AC_CHECK_SIZEOF(uint32_t)
  1158. AC_CHECK_SIZEOF(uint64_t)
  1159. AC_CHECK_SIZEOF(intptr_t)
  1160. AC_CHECK_SIZEOF(uintptr_t)
  1161. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1162. AC_CHECK_SIZEOF(char)
  1163. AC_CHECK_SIZEOF(short)
  1164. AC_CHECK_SIZEOF(int)
  1165. AC_CHECK_SIZEOF(long)
  1166. AC_CHECK_SIZEOF(long long)
  1167. AC_CHECK_SIZEOF(__int64)
  1168. AC_CHECK_SIZEOF(void *)
  1169. AC_CHECK_SIZEOF(time_t)
  1170. AC_CHECK_SIZEOF(size_t)
  1171. AC_CHECK_SIZEOF(pid_t)
  1172. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1173. AC_PC_FROM_UCONTEXT([:])
  1174. dnl used to include sockaddr_storage, but everybody has that.
  1175. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1176. [#ifdef HAVE_SYS_TYPES_H
  1177. #include <sys/types.h>
  1178. #endif
  1179. #ifdef HAVE_NETINET_IN_H
  1180. #include <netinet/in.h>
  1181. #endif
  1182. #ifdef HAVE_NETINET_IN6_H
  1183. #include <netinet/in6.h>
  1184. #endif
  1185. #ifdef HAVE_SYS_SOCKET_H
  1186. #include <sys/socket.h>
  1187. #endif
  1188. #ifdef _WIN32
  1189. #define _WIN32_WINNT 0x0501
  1190. #define WIN32_LEAN_AND_MEAN
  1191. #include <winsock2.h>
  1192. #include <ws2tcpip.h>
  1193. #endif
  1194. ])
  1195. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1196. [#ifdef HAVE_SYS_TYPES_H
  1197. #include <sys/types.h>
  1198. #endif
  1199. #ifdef HAVE_NETINET_IN_H
  1200. #include <netinet/in.h>
  1201. #endif
  1202. #ifdef HAVE_NETINET_IN6_H
  1203. #include <netinet/in6.h>
  1204. #endif
  1205. #ifdef HAVE_SYS_SOCKET_H
  1206. #include <sys/socket.h>
  1207. #endif
  1208. #ifdef _WIN32
  1209. #define _WIN32_WINNT 0x0501
  1210. #define WIN32_LEAN_AND_MEAN
  1211. #include <winsock2.h>
  1212. #include <ws2tcpip.h>
  1213. #endif
  1214. ])
  1215. AC_CHECK_TYPES([rlim_t], , ,
  1216. [#ifdef HAVE_SYS_TYPES_H
  1217. #include <sys/types.h>
  1218. #endif
  1219. #ifdef HAVE_SYS_TIME_H
  1220. #include <sys/time.h>
  1221. #endif
  1222. #ifdef HAVE_SYS_RESOURCE_H
  1223. #include <sys/resource.h>
  1224. #endif
  1225. ])
  1226. AX_CHECK_SIGN([time_t],
  1227. [ : ],
  1228. [ : ], [
  1229. #ifdef HAVE_SYS_TYPES_H
  1230. #include <sys/types.h>
  1231. #endif
  1232. #ifdef HAVE_SYS_TIME_H
  1233. #include <sys/time.h>
  1234. #endif
  1235. #ifdef HAVE_TIME_H
  1236. #include <time.h>
  1237. #endif
  1238. ])
  1239. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1240. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1241. fi
  1242. AX_CHECK_SIGN([size_t],
  1243. [ tor_cv_size_t_signed=yes ],
  1244. [ tor_cv_size_t_signed=no ], [
  1245. #ifdef HAVE_SYS_TYPES_H
  1246. #include <sys/types.h>
  1247. #endif
  1248. ])
  1249. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1250. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1251. fi
  1252. AX_CHECK_SIGN([enum always],
  1253. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1254. [ : ], [
  1255. enum always { AAA, BBB, CCC };
  1256. ])
  1257. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1258. #ifdef HAVE_SYS_SOCKET_H
  1259. #include <sys/socket.h>
  1260. #endif
  1261. ])
  1262. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1263. AC_CHECK_SIZEOF(cell_t)
  1264. # Now make sure that NULL can be represented as zero bytes.
  1265. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1266. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1267. [[#include <stdlib.h>
  1268. #include <string.h>
  1269. #include <stdio.h>
  1270. #ifdef HAVE_STDDEF_H
  1271. #include <stddef.h>
  1272. #endif
  1273. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1274. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1275. [tor_cv_null_is_zero=yes],
  1276. [tor_cv_null_is_zero=no],
  1277. [tor_cv_null_is_zero=cross])])
  1278. if test "$tor_cv_null_is_zero" = "cross"; then
  1279. # Cross-compiling; let's hope that the target isn't raving mad.
  1280. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1281. fi
  1282. if test "$tor_cv_null_is_zero" != "no"; then
  1283. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1284. [Define to 1 iff memset(0) sets pointers to NULL])
  1285. fi
  1286. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1287. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1288. [[#include <stdlib.h>
  1289. #include <string.h>
  1290. #include <stdio.h>
  1291. #ifdef HAVE_STDDEF_H
  1292. #include <stddef.h>
  1293. #endif
  1294. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1295. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1296. [tor_cv_dbl0_is_zero=yes],
  1297. [tor_cv_dbl0_is_zero=no],
  1298. [tor_cv_dbl0_is_zero=cross])])
  1299. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1300. # Cross-compiling; let's hope that the target isn't raving mad.
  1301. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1302. fi
  1303. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1304. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1305. [Define to 1 iff memset(0) sets doubles to 0.0])
  1306. fi
  1307. # And what happens when we malloc zero?
  1308. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1309. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1310. [[#include <stdlib.h>
  1311. #include <string.h>
  1312. #include <stdio.h>
  1313. #ifdef HAVE_STDDEF_H
  1314. #include <stddef.h>
  1315. #endif
  1316. int main () { return malloc(0)?0:1; }]])],
  1317. [tor_cv_malloc_zero_works=yes],
  1318. [tor_cv_malloc_zero_works=no],
  1319. [tor_cv_malloc_zero_works=cross])])
  1320. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1321. # Cross-compiling; let's hope that the target isn't raving mad.
  1322. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1323. fi
  1324. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1325. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1326. [Define to 1 iff malloc(0) returns a pointer])
  1327. fi
  1328. # whether we seem to be in a 2s-complement world.
  1329. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1330. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1331. [[int main () { int problem = ((-99) != (~99)+1);
  1332. return problem ? 1 : 0; }]])],
  1333. [tor_cv_twos_complement=yes],
  1334. [tor_cv_twos_complement=no],
  1335. [tor_cv_twos_complement=cross])])
  1336. if test "$tor_cv_twos_complement" = "cross"; then
  1337. # Cross-compiling; let's hope that the target isn't raving mad.
  1338. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1339. fi
  1340. if test "$tor_cv_twos_complement" != "no"; then
  1341. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1342. [Define to 1 iff we represent negative integers with
  1343. two's complement])
  1344. fi
  1345. # What does shifting a negative value do?
  1346. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1347. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1348. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1349. [tor_cv_sign_extend=yes],
  1350. [tor_cv_sign_extend=no],
  1351. [tor_cv_sign_extend=cross])])
  1352. if test "$tor_cv_sign_extend" = "cross"; then
  1353. # Cross-compiling; let's hope that the target isn't raving mad.
  1354. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1355. fi
  1356. if test "$tor_cv_sign_extend" != "no"; then
  1357. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1358. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1359. fi
  1360. # Is uint8_t the same type as unsigned char?
  1361. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1362. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1363. #include <stdint.h>
  1364. extern uint8_t c;
  1365. unsigned char c;]])],
  1366. [tor_cv_uint8_uchar=yes],
  1367. [tor_cv_uint8_uchar=no],
  1368. [tor_cv_uint8_uchar=cross])])
  1369. if test "$tor_cv_uint8_uchar" = "cross"; then
  1370. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1371. fi
  1372. if test "$tor_cv_uint8_uchar" = "no"; then
  1373. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1374. fi
  1375. # Whether we should use the dmalloc memory allocation debugging library.
  1376. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1377. AC_ARG_WITH(dmalloc,
  1378. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1379. [if [[ "$withval" = "yes" ]]; then
  1380. dmalloc=1
  1381. AC_MSG_RESULT(yes)
  1382. else
  1383. dmalloc=1
  1384. AC_MSG_RESULT(no)
  1385. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1386. )
  1387. if [[ $dmalloc -eq 1 ]]; then
  1388. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1389. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1390. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1391. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1392. fi
  1393. AC_ARG_WITH(tcmalloc,
  1394. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1395. [ tcmalloc=yes ], [ tcmalloc=no ])
  1396. if test "x$tcmalloc" = "xyes"; then
  1397. LDFLAGS="-ltcmalloc $LDFLAGS"
  1398. fi
  1399. using_custom_malloc=no
  1400. if test "x$enable_openbsd_malloc" = "xyes"; then
  1401. using_custom_malloc=yes
  1402. fi
  1403. if test "x$tcmalloc" = "xyes"; then
  1404. using_custom_malloc=yes
  1405. fi
  1406. if test "$using_custom_malloc" = "no"; then
  1407. AC_CHECK_FUNCS(mallinfo)
  1408. fi
  1409. # By default, we're going to assume we don't have mlockall()
  1410. # bionic and other platforms have various broken mlockall subsystems.
  1411. # Some systems don't have a working mlockall, some aren't linkable,
  1412. # and some have it but don't declare it.
  1413. AC_CHECK_FUNCS(mlockall)
  1414. AC_CHECK_DECLS([mlockall], , , [
  1415. #ifdef HAVE_SYS_MMAN_H
  1416. #include <sys/mman.h>
  1417. #endif])
  1418. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1419. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1420. # using macros
  1421. AC_CHECK_DECLS([getpagesize], , , [
  1422. #ifdef HAVE_UNISTD_H
  1423. #include <unistd.h>
  1424. #endif])
  1425. # Allow user to specify an alternate syslog facility
  1426. AC_ARG_WITH(syslog-facility,
  1427. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1428. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1429. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1430. AC_SUBST(LOGFACILITY)
  1431. # Check if we have getresuid and getresgid
  1432. AC_CHECK_FUNCS(getresuid getresgid)
  1433. # Check for gethostbyname_r in all its glorious incompatible versions.
  1434. # (This logic is based on that in Python's configure.in)
  1435. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1436. [Define this if you have any gethostbyname_r()])
  1437. AC_CHECK_FUNC(gethostbyname_r, [
  1438. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1439. OLD_CFLAGS=$CFLAGS
  1440. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1441. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1442. #include <netdb.h>
  1443. ]], [[
  1444. char *cp1, *cp2;
  1445. struct hostent *h1, *h2;
  1446. int i1, i2;
  1447. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1448. ]])],[
  1449. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1450. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1451. [Define this if gethostbyname_r takes 6 arguments])
  1452. AC_MSG_RESULT(6)
  1453. ], [
  1454. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1455. #include <netdb.h>
  1456. ]], [[
  1457. char *cp1, *cp2;
  1458. struct hostent *h1;
  1459. int i1, i2;
  1460. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1461. ]])], [
  1462. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1463. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1464. [Define this if gethostbyname_r takes 5 arguments])
  1465. AC_MSG_RESULT(5)
  1466. ], [
  1467. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1468. #include <netdb.h>
  1469. ]], [[
  1470. char *cp1;
  1471. struct hostent *h1;
  1472. struct hostent_data hd;
  1473. (void) gethostbyname_r(cp1,h1,&hd);
  1474. ]])], [
  1475. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1476. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1477. [Define this if gethostbyname_r takes 3 arguments])
  1478. AC_MSG_RESULT(3)
  1479. ], [
  1480. AC_MSG_RESULT(0)
  1481. ])
  1482. ])
  1483. ])
  1484. CFLAGS=$OLD_CFLAGS
  1485. ])
  1486. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1487. tor_cv_have_func_macro,
  1488. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1489. #include <stdio.h>
  1490. int main(int c, char **v) { puts(__func__); }])],
  1491. tor_cv_have_func_macro=yes,
  1492. tor_cv_have_func_macro=no))
  1493. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1494. tor_cv_have_FUNC_macro,
  1495. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1496. #include <stdio.h>
  1497. int main(int c, char **v) { puts(__FUNC__); }])],
  1498. tor_cv_have_FUNC_macro=yes,
  1499. tor_cv_have_FUNC_macro=no))
  1500. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1501. tor_cv_have_FUNCTION_macro,
  1502. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1503. #include <stdio.h>
  1504. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1505. tor_cv_have_FUNCTION_macro=yes,
  1506. tor_cv_have_FUNCTION_macro=no))
  1507. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1508. tor_cv_have_environ_declared,
  1509. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1510. #ifdef HAVE_UNISTD_H
  1511. #include <unistd.h>
  1512. #endif
  1513. #include <stdlib.h>
  1514. int main(int c, char **v) { char **t = environ; }])],
  1515. tor_cv_have_environ_declared=yes,
  1516. tor_cv_have_environ_declared=no))
  1517. if test "$tor_cv_have_func_macro" = "yes"; then
  1518. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1519. fi
  1520. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1521. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1522. fi
  1523. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1524. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1525. [Defined if the compiler supports __FUNCTION__])
  1526. fi
  1527. if test "$tor_cv_have_environ_declared" = "yes"; then
  1528. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1529. [Defined if we have extern char **environ already declared])
  1530. fi
  1531. # $prefix stores the value of the --prefix command line option, or
  1532. # NONE if the option wasn't set. In the case that it wasn't set, make
  1533. # it be the default, so that we can use it to expand directories now.
  1534. if test "x$prefix" = "xNONE"; then
  1535. prefix=$ac_default_prefix
  1536. fi
  1537. # and similarly for $exec_prefix
  1538. if test "x$exec_prefix" = "xNONE"; then
  1539. exec_prefix=$prefix
  1540. fi
  1541. if test "x$BUILDDIR" = "x"; then
  1542. BUILDDIR=`pwd`
  1543. fi
  1544. AC_SUBST(BUILDDIR)
  1545. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1546. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1547. if test "x$CONFDIR" = "x"; then
  1548. CONFDIR=`eval echo $sysconfdir/tor`
  1549. fi
  1550. AC_SUBST(CONFDIR)
  1551. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1552. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1553. BINDIR=`eval echo $bindir`
  1554. AC_SUBST(BINDIR)
  1555. LOCALSTATEDIR=`eval echo $localstatedir`
  1556. AC_SUBST(LOCALSTATEDIR)
  1557. if test "$bwin32" = "true"; then
  1558. # Test if the linker supports the --nxcompat and --dynamicbase options
  1559. # for Windows
  1560. save_LDFLAGS="$LDFLAGS"
  1561. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1562. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1563. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1564. [AC_MSG_RESULT([yes])]
  1565. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1566. [AC_MSG_RESULT([no])]
  1567. )
  1568. LDFLAGS="$save_LDFLAGS"
  1569. fi
  1570. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1571. # than autoconf's macros like.
  1572. if test "$GCC" = "yes"; then
  1573. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1574. # accident waiting to happen.
  1575. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1576. else
  1577. # Override optimization level for non-gcc compilers
  1578. CFLAGS="$CFLAGS -O"
  1579. enable_gcc_warnings=no
  1580. enable_gcc_warnings_advisory=no
  1581. fi
  1582. # Warnings implies advisory-warnings and -Werror.
  1583. if test "$enable_gcc_warnings" = "yes"; then
  1584. enable_gcc_warnings_advisory=yes
  1585. enable_fatal_warnings=yes
  1586. fi
  1587. # OS X Lion started deprecating the system openssl. Let's just disable
  1588. # all deprecation warnings on OS X. Also, to potentially make the binary
  1589. # a little smaller, let's enable dead_strip.
  1590. case "$host_os" in
  1591. darwin*)
  1592. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1593. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1594. esac
  1595. # Add some more warnings which we use in development but not in the
  1596. # released versions. (Some relevant gcc versions can't handle these.)
  1597. #
  1598. # Note that we have to do this near the end of the autoconf process, or
  1599. # else we may run into problems when these warnings hit on the testing C
  1600. # programs that autoconf wants to build.
  1601. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1602. case "$host" in
  1603. *-*-openbsd* | *-*-bitrig*)
  1604. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1605. # That's fine, except that the headers don't pass -Wredundant-decls.
  1606. # Therefore, let's disable -Wsystem-headers when we're building
  1607. # with maximal warnings on OpenBSD.
  1608. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1609. esac
  1610. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1611. # have it work better.
  1612. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1613. # This warning was added in gcc 4.3, but it appears to generate
  1614. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1615. #CFLAGS="$CFLAGS -Wlogical-op"
  1616. m4_foreach_w([warning_flag], [
  1617. -Waddress
  1618. -Waddress-of-array-temporary
  1619. -Waddress-of-temporary
  1620. -Wambiguous-macro
  1621. -Wanonymous-pack-parens
  1622. -Warc
  1623. -Warc-abi
  1624. -Warc-bridge-casts-disallowed-in-nonarc
  1625. -Warc-maybe-repeated-use-of-weak
  1626. -Warc-performSelector-leaks
  1627. -Warc-repeated-use-of-weak
  1628. -Warray-bounds
  1629. -Warray-bounds-pointer-arithmetic
  1630. -Wasm
  1631. -Wasm-operand-widths
  1632. -Watomic-properties
  1633. -Watomic-property-with-user-defined-accessor
  1634. -Wauto-import
  1635. -Wauto-storage-class
  1636. -Wauto-var-id
  1637. -Wavailability
  1638. -Wbackslash-newline-escape
  1639. -Wbad-array-new-length
  1640. -Wbind-to-temporary-copy
  1641. -Wbitfield-constant-conversion
  1642. -Wbool-conversion
  1643. -Wbool-conversions
  1644. -Wbuiltin-requires-header
  1645. -Wchar-align
  1646. -Wcompare-distinct-pointer-types
  1647. -Wcomplex-component-init
  1648. -Wconditional-type-mismatch
  1649. -Wconfig-macros
  1650. -Wconstant-conversion
  1651. -Wconstant-logical-operand
  1652. -Wconstexpr-not-const
  1653. -Wcustom-atomic-properties
  1654. -Wdangling-field
  1655. -Wdangling-initializer-list
  1656. -Wdate-time
  1657. -Wdelegating-ctor-cycles
  1658. -Wdeprecated-implementations
  1659. -Wdeprecated-register
  1660. -Wdirect-ivar-access
  1661. -Wdiscard-qual
  1662. -Wdistributed-object-modifiers
  1663. -Wdivision-by-zero
  1664. -Wdollar-in-identifier-extension
  1665. -Wdouble-promotion
  1666. -Wduplicate-decl-specifier
  1667. -Wduplicate-enum
  1668. -Wduplicate-method-arg
  1669. -Wduplicate-method-match
  1670. -Wduplicated-cond
  1671. -Wdynamic-class-memaccess
  1672. -Wembedded-directive
  1673. -Wempty-translation-unit
  1674. -Wenum-conversion
  1675. -Wexit-time-destructors
  1676. -Wexplicit-ownership-type
  1677. -Wextern-initializer
  1678. -Wextra
  1679. -Wextra-semi
  1680. -Wextra-tokens
  1681. -Wflexible-array-extensions
  1682. -Wfloat-conversion
  1683. -Wformat-non-iso
  1684. -Wfour-char-constants
  1685. -Wgcc-compat
  1686. -Wglobal-constructors
  1687. -Wgnu-array-member-paren-init
  1688. -Wgnu-designator
  1689. -Wgnu-static-float-init
  1690. -Wheader-guard
  1691. -Wheader-hygiene
  1692. -Widiomatic-parentheses
  1693. -Wignored-attributes
  1694. -Wimplicit-atomic-properties
  1695. -Wimplicit-conversion-floating-point-to-bool
  1696. -Wimplicit-exception-spec-mismatch
  1697. -Wimplicit-fallthrough
  1698. -Wimplicit-fallthrough-per-function
  1699. -Wimplicit-retain-self
  1700. -Wimport-preprocessor-directive-pedantic
  1701. -Wincompatible-library-redeclaration
  1702. -Wincompatible-pointer-types-discards-qualifiers
  1703. -Wincomplete-implementation
  1704. -Wincomplete-module
  1705. -Wincomplete-umbrella
  1706. -Winit-self
  1707. -Wint-conversions
  1708. -Wint-to-void-pointer-cast
  1709. -Winteger-overflow
  1710. -Winvalid-constexpr
  1711. -Winvalid-iboutlet
  1712. -Winvalid-noreturn
  1713. -Winvalid-pp-token
  1714. -Winvalid-source-encoding
  1715. -Winvalid-token-paste
  1716. -Wknr-promoted-parameter
  1717. -Wlanguage-extension-token
  1718. -Wlarge-by-value-copy
  1719. -Wliteral-conversion
  1720. -Wliteral-range
  1721. -Wlocal-type-template-args
  1722. -Wlogical-op
  1723. -Wloop-analysis
  1724. -Wmain-return-type
  1725. -Wmalformed-warning-check
  1726. -Wmethod-signatures
  1727. -Wmicrosoft
  1728. -Wmicrosoft-exists
  1729. -Wmismatched-parameter-types
  1730. -Wmismatched-return-types
  1731. -Wmissing-field-initializers
  1732. -Wmissing-format-attribute
  1733. -Wmissing-noreturn
  1734. -Wmissing-selector-name
  1735. -Wmissing-sysroot
  1736. -Wmissing-variable-declarations
  1737. -Wmodule-conflict
  1738. -Wnested-anon-types
  1739. -Wnewline-eof
  1740. -Wnon-literal-null-conversion
  1741. -Wnon-pod-varargs
  1742. -Wnonportable-cfstrings
  1743. -Wnormalized=id
  1744. -Wnull-arithmetic
  1745. -Wnull-character
  1746. -Wnull-conversion
  1747. -Wnull-dereference
  1748. -Wout-of-line-declaration
  1749. -Wover-aligned
  1750. -Woverlength-strings
  1751. -Woverride-init
  1752. -Woverriding-method-mismatch
  1753. -Wpointer-type-mismatch
  1754. -Wpredefined-identifier-outside-function
  1755. -Wprotocol-property-synthesis-ambiguity
  1756. -Wreadonly-iboutlet-property
  1757. -Wreadonly-setter-attrs
  1758. -Wreceiver-expr
  1759. -Wreceiver-forward-class
  1760. -Wreceiver-is-weak
  1761. -Wreinterpret-base-class
  1762. -Wrequires-super-attribute
  1763. -Wreserved-user-defined-literal
  1764. -Wreturn-stack-address
  1765. -Wsection
  1766. -Wselector-type-mismatch
  1767. -Wsentinel
  1768. -Wserialized-diagnostics
  1769. -Wshadow
  1770. -Wshift-count-negative
  1771. -Wshift-count-overflow
  1772. -Wshift-negative-value
  1773. -Wshift-overflow=2
  1774. -Wshift-sign-overflow
  1775. -Wshorten-64-to-32
  1776. -Wsizeof-array-argument
  1777. -Wsource-uses-openmp
  1778. -Wstatic-float-init
  1779. -Wstatic-in-inline
  1780. -Wstatic-local-in-inline
  1781. -Wstrict-overflow=1
  1782. -Wstring-compare
  1783. -Wstring-conversion
  1784. -Wstrlcpy-strlcat-size
  1785. -Wstrncat-size
  1786. -Wsuggest-attribute=format
  1787. -Wsuggest-attribute=noreturn
  1788. -Wsuper-class-method-mismatch
  1789. -Wswitch-bool
  1790. -Wsync-nand
  1791. -Wtautological-constant-out-of-range-compare
  1792. -Wtentative-definition-incomplete-type
  1793. -Wtrampolines
  1794. -Wtype-safety
  1795. -Wtypedef-redefinition
  1796. -Wtypename-missing
  1797. -Wundefined-inline
  1798. -Wundefined-internal
  1799. -Wundefined-reinterpret-cast
  1800. -Wunicode
  1801. -Wunicode-whitespace
  1802. -Wunknown-warning-option
  1803. -Wunnamed-type-template-args
  1804. -Wunneeded-member-function
  1805. -Wunsequenced
  1806. -Wunsupported-visibility
  1807. -Wunused-but-set-parameter
  1808. -Wunused-but-set-variable
  1809. -Wunused-command-line-argument
  1810. -Wunused-const-variable=2
  1811. -Wunused-exception-parameter
  1812. -Wunused-local-typedefs
  1813. -Wunused-member-function
  1814. -Wunused-sanitize-argument
  1815. -Wunused-volatile-lvalue
  1816. -Wuser-defined-literals
  1817. -Wvariadic-macros
  1818. -Wvector-conversion
  1819. -Wvector-conversions
  1820. -Wvexing-parse
  1821. -Wvisibility
  1822. -Wvla-extension
  1823. -Wzero-length-array
  1824. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1825. dnl We should re-enable this in some later version. Clang doesn't
  1826. dnl mind, but it causes trouble with GCC.
  1827. dnl -Wstrict-overflow=2
  1828. dnl These seem to require annotations that we don't currently use,
  1829. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1830. dnl -Wthread-safety
  1831. dnl -Wthread-safety-analysis
  1832. dnl -Wthread-safety-attributes
  1833. dnl -Wthread-safety-beta
  1834. dnl -Wthread-safety-precise
  1835. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1836. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1837. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1838. CFLAGS="$CFLAGS -Wwrite-strings"
  1839. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1840. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1841. CFLAGS="$CFLAGS -Wunused-parameter "
  1842. # These interfere with building main() { return 0; }, which autoconf
  1843. # likes to use as its default program.
  1844. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1845. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1846. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1847. fi
  1848. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1849. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1850. fi
  1851. if test "x$enable_fatal_warnings" = "xyes"; then
  1852. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1853. # default autoconf programs are full of errors.
  1854. CFLAGS="$CFLAGS -Werror"
  1855. fi
  1856. fi
  1857. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1858. case "$host_os" in
  1859. darwin*)
  1860. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1861. esac
  1862. fi
  1863. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1864. AC_CONFIG_FILES([
  1865. Doxyfile
  1866. Makefile
  1867. contrib/dist/suse/tor.sh
  1868. contrib/operator-tools/tor.logrotate
  1869. contrib/dist/tor.sh
  1870. contrib/dist/torctl
  1871. contrib/dist/tor.service
  1872. src/config/torrc.sample
  1873. src/config/torrc.minimal
  1874. src/rust/.cargo/config
  1875. scripts/maint/checkOptionDocs.pl
  1876. scripts/maint/updateVersions.pl
  1877. ])
  1878. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1879. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1880. for file in $regular_mans ; do
  1881. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1882. echo "==================================";
  1883. echo;
  1884. echo "Building Tor has failed since manpages cannot be built.";
  1885. echo;
  1886. echo "You need asciidoc installed to be able to build the manpages.";
  1887. echo "To build without manpages, use the --disable-asciidoc argument";
  1888. echo "when calling configure.";
  1889. echo;
  1890. echo "==================================";
  1891. exit 1;
  1892. fi
  1893. done
  1894. fi
  1895. if test "$fragile_hardening" = "yes"; then
  1896. AC_MSG_WARN([
  1897. ============
  1898. Warning! Building Tor with --enable-fragile-hardening (also known as
  1899. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  1900. other kinds of attacks easier. A Tor instance build with this option will be
  1901. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  1902. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  1903. denial of service attacks. For more information, see
  1904. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  1905. ============
  1906. ])
  1907. fi
  1908. AC_OUTPUT