configure.ac 69 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],[0.3.3.0-alpha-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_USE_SYSTEM_EXTENSIONS
  16. AC_CANONICAL_HOST
  17. PKG_PROG_PKG_CONFIG
  18. if test -f "/etc/redhat-release"; then
  19. if test -f "/usr/kerberos/include"; then
  20. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  21. fi
  22. fi
  23. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  24. # the += operator on it in src/or/Makefile.am
  25. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  28. AC_ARG_ENABLE(static-openssl,
  29. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  30. AC_ARG_ENABLE(static-libevent,
  31. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  32. AC_ARG_ENABLE(static-zlib,
  33. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  34. AC_ARG_ENABLE(static-tor,
  35. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  36. AC_ARG_ENABLE(unittests,
  37. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  38. AC_ARG_ENABLE(coverage,
  39. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  40. AC_ARG_ENABLE(asserts-in-tests,
  41. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  42. AC_ARG_ENABLE(system-torrc,
  43. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  44. AC_ARG_ENABLE(libfuzzer,
  45. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  46. AC_ARG_ENABLE(oss-fuzz,
  47. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  48. 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. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  219. AC_C_FLEXIBLE_ARRAY_MEMBER
  220. ], [
  221. dnl Maybe we've got an old autoconf...
  222. AC_CACHE_CHECK([for flexible array members],
  223. tor_cv_c_flexarray,
  224. [AC_COMPILE_IFELSE(
  225. AC_LANG_PROGRAM([
  226. struct abc { int a; char b[]; };
  227. ], [
  228. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  229. def->b[0] = 33;
  230. ]),
  231. [tor_cv_c_flexarray=yes],
  232. [tor_cv_c_flexarray=no])])
  233. if test "$tor_cv_flexarray" = "yes"; then
  234. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  235. else
  236. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  237. fi
  238. ])
  239. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  240. tor_cv_c_c99_decl,
  241. [AC_COMPILE_IFELSE(
  242. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  243. [tor_cv_c_c99_decl=yes],
  244. [tor_cv_c_c99_decl=no] )])
  245. if test "$tor_cv_c_c99_decl" != "yes"; then
  246. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  247. fi
  248. AC_CACHE_CHECK([for working C99 designated initializers],
  249. tor_cv_c_c99_designated_init,
  250. [AC_COMPILE_IFELSE(
  251. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  252. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  253. [tor_cv_c_c99_designated_init=yes],
  254. [tor_cv_c_c99_designated_init=no] )])
  255. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  256. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  257. fi
  258. TORUSER=_tor
  259. AC_ARG_WITH(tor-user,
  260. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  261. [
  262. TORUSER=$withval
  263. ]
  264. )
  265. AC_SUBST(TORUSER)
  266. TORGROUP=_tor
  267. AC_ARG_WITH(tor-group,
  268. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  269. [
  270. TORGROUP=$withval
  271. ]
  272. )
  273. AC_SUBST(TORGROUP)
  274. dnl If _WIN32 is defined and non-zero, we are building for win32
  275. AC_MSG_CHECKING([for win32])
  276. AC_RUN_IFELSE([AC_LANG_SOURCE([
  277. int main(int c, char **v) {
  278. #ifdef _WIN32
  279. #if _WIN32
  280. return 0;
  281. #else
  282. return 1;
  283. #endif
  284. #else
  285. return 2;
  286. #endif
  287. }])],
  288. bwin32=true; AC_MSG_RESULT([yes]),
  289. bwin32=false; AC_MSG_RESULT([no]),
  290. bwin32=cross; AC_MSG_RESULT([cross])
  291. )
  292. if test "$bwin32" = "cross"; then
  293. AC_MSG_CHECKING([for win32 (cross)])
  294. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  295. #ifdef _WIN32
  296. int main(int c, char **v) {return 0;}
  297. #else
  298. #error
  299. int main(int c, char **v) {return x(y);}
  300. #endif
  301. ])],
  302. bwin32=true; AC_MSG_RESULT([yes]),
  303. bwin32=false; AC_MSG_RESULT([no]))
  304. fi
  305. AH_BOTTOM([
  306. #ifdef _WIN32
  307. /* Defined to access windows functions and definitions for >=WinXP */
  308. # ifndef WINVER
  309. # define WINVER 0x0501
  310. # endif
  311. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  312. # ifndef _WIN32_WINNT
  313. # define _WIN32_WINNT 0x0501
  314. # endif
  315. /* Defined to avoid including some windows headers as part of Windows.h */
  316. # ifndef WIN32_LEAN_AND_MEAN
  317. # define WIN32_LEAN_AND_MEAN 1
  318. # endif
  319. #endif
  320. ])
  321. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  322. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  323. dnl Enable C99 when compiling with MIPSpro
  324. AC_MSG_CHECKING([for MIPSpro compiler])
  325. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  326. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  327. #error
  328. return x(y);
  329. #endif
  330. ])],
  331. bmipspro=false; AC_MSG_RESULT(no),
  332. bmipspro=true; AC_MSG_RESULT(yes))
  333. if test "$bmipspro" = "true"; then
  334. CFLAGS="$CFLAGS -c99"
  335. fi
  336. AC_C_BIGENDIAN
  337. if test "x$enable_rust" = "xyes"; then
  338. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  339. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  340. if test "x$RUSTC" = "xno"; then
  341. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  342. fi
  343. AC_ARG_VAR([CARGO], [path to the cargo binary])
  344. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  345. if test "x$CARGO" = "xno"; then
  346. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  347. fi
  348. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  349. if test "x$enable_cargo_online_mode" = "xyes"; then
  350. CARGO_ONLINE=
  351. RUST_DL=#
  352. else
  353. CARGO_ONLINE=--frozen
  354. RUST_DL=
  355. dnl When we're not allowed to touch the network, we need crate dependencies
  356. dnl locally available.
  357. AC_MSG_CHECKING([rust crate dependencies])
  358. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  359. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  360. TOR_RUST_DEPENDENCIES="$srcdir/src/ext/rust/"
  361. NEED_MOD=1
  362. fi
  363. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  364. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  365. fi
  366. for dep in $rust_crates; do
  367. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  368. AC_MSG_ERROR([Failure to find rust dependency $TOR_RUST_DEPENDENCIES/$dep. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  369. fi
  370. done
  371. if test "x$NEED_MOD" = "x1"; then
  372. dnl When looking for dependencies from cargo, pick right directory
  373. TOR_RUST_DEPENDENCIES="../../src/ext/rust"
  374. fi
  375. fi
  376. dnl For now both MSVC and MinGW rust libraries will output static libs with
  377. dnl the MSVC naming convention.
  378. if test "$bwin32" = "true"; then
  379. TOR_RUST_STATIC_NAME=tor_rust.lib
  380. else
  381. TOR_RUST_STATIC_NAME=libtor_rust.a
  382. fi
  383. AC_SUBST(TOR_RUST_STATIC_NAME)
  384. AC_SUBST(CARGO_ONLINE)
  385. AC_SUBST(RUST_DL)
  386. dnl Let's check the rustc version, too
  387. AC_MSG_CHECKING([rust version])
  388. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  389. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  390. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  391. AC_MSG_ERROR([rustc version couldn't be identified])
  392. fi
  393. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  394. AC_MSG_ERROR([rustc must be at least version 1.14])
  395. fi
  396. fi
  397. AC_SEARCH_LIBS(socket, [socket network])
  398. AC_SEARCH_LIBS(gethostbyname, [nsl])
  399. AC_SEARCH_LIBS(dlopen, [dl])
  400. AC_SEARCH_LIBS(inet_aton, [resolv])
  401. AC_SEARCH_LIBS(backtrace, [execinfo])
  402. saved_LIBS="$LIBS"
  403. AC_SEARCH_LIBS([clock_gettime], [rt])
  404. if test "$LIBS" != "$saved_LIBS"; then
  405. # Looks like we need -lrt for clock_gettime().
  406. have_rt=yes
  407. fi
  408. AC_SEARCH_LIBS(pthread_create, [pthread])
  409. AC_SEARCH_LIBS(pthread_detach, [pthread])
  410. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  411. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  412. AC_CHECK_FUNCS(
  413. _NSGetEnviron \
  414. RtlSecureZeroMemory \
  415. SecureZeroMemory \
  416. accept4 \
  417. backtrace \
  418. backtrace_symbols_fd \
  419. eventfd \
  420. explicit_bzero \
  421. timingsafe_memcmp \
  422. flock \
  423. ftime \
  424. get_current_dir_name \
  425. getaddrinfo \
  426. getifaddrs \
  427. getpass \
  428. getrlimit \
  429. gettimeofday \
  430. gmtime_r \
  431. gnu_get_libc_version \
  432. htonll \
  433. inet_aton \
  434. ioctl \
  435. issetugid \
  436. llround \
  437. localtime_r \
  438. lround \
  439. memmem \
  440. memset_s \
  441. pipe \
  442. pipe2 \
  443. prctl \
  444. readpassphrase \
  445. rint \
  446. sigaction \
  447. socketpair \
  448. statvfs \
  449. strlcat \
  450. strlcpy \
  451. strnlen \
  452. strptime \
  453. strtok_r \
  454. strtoull \
  455. sysconf \
  456. sysctl \
  457. truncate \
  458. uname \
  459. usleep \
  460. vasprintf \
  461. _vscprintf
  462. )
  463. # Apple messed up when they added two functions functions in Sierra: they
  464. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  465. # checks. So we should only probe for those functions if we are sure that we
  466. # are not targetting OSX 10.11 or earlier.
  467. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  468. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  469. #ifdef __APPLE__
  470. # include <AvailabilityMacros.h>
  471. # ifndef MAC_OS_X_VERSION_10_12
  472. # define MAC_OS_X_VERSION_10_12 101200
  473. # endif
  474. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  475. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  476. # error "Running on Mac OSX 10.11 or earlier"
  477. # endif
  478. # endif
  479. #endif
  480. ]], [[]])],
  481. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  482. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  483. if test "$on_macos_pre_10_12" = "no"; then
  484. AC_CHECK_FUNCS(
  485. clock_gettime \
  486. getentropy \
  487. )
  488. fi
  489. if test "$bwin32" != "true"; then
  490. AC_CHECK_HEADERS(pthread.h)
  491. AC_CHECK_FUNCS(pthread_create)
  492. AC_CHECK_FUNCS(pthread_condattr_setclock)
  493. fi
  494. if test "$bwin32" = "true"; then
  495. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  496. #include <windows.h>
  497. #include <conio.h>
  498. #include <wchar.h>
  499. ])
  500. fi
  501. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  502. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  503. dnl ------------------------------------------------------
  504. dnl Where do you live, libevent? And how do we call you?
  505. if test "$bwin32" = "true"; then
  506. TOR_LIB_WS32=-lws2_32
  507. TOR_LIB_IPHLPAPI=-liphlpapi
  508. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  509. # think it's actually necessary.
  510. TOR_LIB_GDI=-lgdi32
  511. TOR_LIB_USERENV=-luserenv
  512. else
  513. TOR_LIB_WS32=
  514. TOR_LIB_GDI=
  515. TOR_LIB_USERENV=
  516. fi
  517. AC_SUBST(TOR_LIB_WS32)
  518. AC_SUBST(TOR_LIB_GDI)
  519. AC_SUBST(TOR_LIB_IPHLPAPI)
  520. AC_SUBST(TOR_LIB_USERENV)
  521. tor_libevent_pkg_redhat="libevent"
  522. tor_libevent_pkg_debian="libevent-dev"
  523. tor_libevent_devpkg_redhat="libevent-devel"
  524. tor_libevent_devpkg_debian="libevent-dev"
  525. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  526. dnl linking for static builds.
  527. STATIC_LIBEVENT_FLAGS=""
  528. if test "$enable_static_libevent" = "yes"; then
  529. if test "$have_rt" = "yes"; then
  530. STATIC_LIBEVENT_FLAGS=" -lrt "
  531. fi
  532. fi
  533. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  534. #ifdef _WIN32
  535. #include <winsock2.h>
  536. #endif
  537. #include <sys/time.h>
  538. #include <sys/types.h>
  539. #include <event2/event.h>], [
  540. #ifdef _WIN32
  541. #include <winsock2.h>
  542. #endif
  543. struct event_base;
  544. struct event_base *event_base_new(void);],
  545. [
  546. #ifdef _WIN32
  547. {WSADATA d; WSAStartup(0x101,&d); }
  548. #endif
  549. event_base_free(event_base_new());
  550. ], [--with-libevent-dir], [/opt/libevent])
  551. dnl Determine the incantation needed to link libevent.
  552. save_LIBS="$LIBS"
  553. save_LDFLAGS="$LDFLAGS"
  554. save_CPPFLAGS="$CPPFLAGS"
  555. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  556. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  557. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  558. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  559. if test "$enable_static_libevent" = "yes"; then
  560. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  561. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  562. else
  563. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  564. fi
  565. else
  566. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  567. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  568. 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"))
  569. if test "$ac_cv_search_event_new" != "none required"; then
  570. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  571. fi
  572. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  573. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  574. fi
  575. else
  576. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  577. fi
  578. fi
  579. dnl Now check for particular libevent functions.
  580. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  581. evutil_secure_rng_add_bytes \
  582. ])
  583. LIBS="$save_LIBS"
  584. LDFLAGS="$save_LDFLAGS"
  585. CPPFLAGS="$save_CPPFLAGS"
  586. dnl Check that libevent is at least at version 2.0.10, the first stable
  587. dnl release of its series
  588. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  589. AC_MSG_CHECKING([whether Libevent is new enough])
  590. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  591. #include <event2/event.h>
  592. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  593. #error
  594. int x = y(zz);
  595. #else
  596. int x = 1;
  597. #endif
  598. ])], [ AC_MSG_RESULT([yes]) ],
  599. [ AC_MSG_RESULT([no])
  600. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  601. LIBS="$save_LIBS"
  602. LDFLAGS="$save_LDFLAGS"
  603. CPPFLAGS="$save_CPPFLAGS"
  604. AC_SUBST(TOR_LIBEVENT_LIBS)
  605. dnl ------------------------------------------------------
  606. dnl Where do you live, libm?
  607. dnl On some platforms (Haiku/BeOS) the math library is
  608. dnl part of libroot. In which case don't link against lm
  609. TOR_LIB_MATH=""
  610. save_LIBS="$LIBS"
  611. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  612. if test "$ac_cv_search_pow" != "none required"; then
  613. TOR_LIB_MATH="$ac_cv_search_pow"
  614. fi
  615. LIBS="$save_LIBS"
  616. AC_SUBST(TOR_LIB_MATH)
  617. dnl ------------------------------------------------------
  618. dnl Where do you live, openssl? And how do we call you?
  619. tor_openssl_pkg_redhat="openssl"
  620. tor_openssl_pkg_debian="libssl-dev"
  621. tor_openssl_devpkg_redhat="openssl-devel"
  622. tor_openssl_devpkg_debian="libssl-dev"
  623. ALT_openssl_WITHVAL=""
  624. AC_ARG_WITH(ssl-dir,
  625. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  626. [
  627. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  628. ALT_openssl_WITHVAL="$withval"
  629. fi
  630. ])
  631. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  632. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  633. [#include <openssl/ssl.h>],
  634. [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
  635. [TLSv1_1_method();], [],
  636. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  637. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  638. if test "$enable_static_openssl" = "yes"; then
  639. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  640. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  641. else
  642. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  643. fi
  644. else
  645. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  646. fi
  647. AC_SUBST(TOR_OPENSSL_LIBS)
  648. dnl Now check for particular openssl functions.
  649. save_LIBS="$LIBS"
  650. save_LDFLAGS="$LDFLAGS"
  651. save_CPPFLAGS="$CPPFLAGS"
  652. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  653. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  654. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  655. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  656. #include <openssl/opensslv.h>
  657. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  658. #error "too old"
  659. #endif
  660. ]], [[]])],
  661. [ : ],
  662. [ 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.]) ])
  663. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  664. #include <openssl/opensslv.h>
  665. #include <openssl/evp.h>
  666. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  667. #error "no ECC"
  668. #endif
  669. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  670. #error "curves unavailable"
  671. #endif
  672. ]], [[]])],
  673. [ : ],
  674. [ 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.]) ])
  675. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  676. [#include <openssl/ssl.h>
  677. ])
  678. AC_CHECK_FUNCS([ \
  679. SSL_SESSION_get_master_key \
  680. SSL_get_server_random \
  681. SSL_get_client_ciphers \
  682. SSL_get_client_random \
  683. SSL_CIPHER_find \
  684. TLS_method
  685. ])
  686. dnl Check if OpenSSL has scrypt implementation.
  687. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  688. dnl Check if OpenSSL structures are opaque
  689. AC_CHECK_MEMBERS([SSL.state], , ,
  690. [#include <openssl/ssl.h>
  691. ])
  692. dnl Define the set of checks for KIST scheduler support.
  693. AC_DEFUN([CHECK_KIST_SUPPORT],[
  694. dnl KIST needs struct tcp_info and for certain members to exist.
  695. AC_CHECK_MEMBERS(
  696. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  697. , ,[[#include <netinet/tcp.h>]])
  698. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  699. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  700. #include <linux/sockios.h>
  701. #ifndef SIOCOUTQNSD
  702. #error
  703. #endif
  704. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  705. if test "x$have_siocoutqnsd" = "xyes"; then
  706. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  707. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  708. have_kist_support=yes
  709. fi
  710. fi
  711. fi
  712. ])
  713. dnl Now, trigger the check.
  714. CHECK_KIST_SUPPORT
  715. AS_IF([test "x$have_kist_support" = "xyes"],
  716. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  717. on this system])],
  718. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  719. LIBS="$save_LIBS"
  720. LDFLAGS="$save_LDFLAGS"
  721. CPPFLAGS="$save_CPPFLAGS"
  722. dnl ------------------------------------------------------
  723. dnl Where do you live, zlib? And how do we call you?
  724. tor_zlib_pkg_redhat="zlib"
  725. tor_zlib_pkg_debian="zlib1g"
  726. tor_zlib_devpkg_redhat="zlib-devel"
  727. tor_zlib_devpkg_debian="zlib1g-dev"
  728. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  729. [#include <zlib.h>],
  730. [const char * zlibVersion(void);],
  731. [zlibVersion();], [--with-zlib-dir],
  732. [/opt/zlib])
  733. if test "$enable_static_zlib" = "yes"; then
  734. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  735. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  736. using --enable-static-zlib")
  737. else
  738. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  739. fi
  740. else
  741. TOR_ZLIB_LIBS="-lz"
  742. fi
  743. AC_SUBST(TOR_ZLIB_LIBS)
  744. dnl ------------------------------------------------------
  745. dnl Where we do we find lzma?
  746. AC_ARG_ENABLE(lzma,
  747. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  748. [case "${enableval}" in
  749. "yes") lzma=true ;;
  750. "no") lzma=false ;;
  751. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  752. esac], [lzma=auto])
  753. if test "x$enable_lzma" = "xno"; then
  754. have_lzma=no;
  755. else
  756. PKG_CHECK_MODULES([LZMA],
  757. [liblzma],
  758. have_lzma=yes,
  759. have_lzma=no)
  760. if test "x$have_lzma" = "xno" ; then
  761. AC_MSG_WARN([Unable to find liblzma.])
  762. fi
  763. fi
  764. if test "x$have_lzma" = "xyes"; then
  765. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  766. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  767. TOR_LZMA_LIBS="${LZMA_LIBS}"
  768. fi
  769. AC_SUBST(TOR_LZMA_CFLAGS)
  770. AC_SUBST(TOR_LZMA_LIBS)
  771. dnl ------------------------------------------------------
  772. dnl Where we do we find zstd?
  773. AC_ARG_ENABLE(zstd,
  774. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  775. [case "${enableval}" in
  776. "yes") zstd=true ;;
  777. "no") zstd=false ;;
  778. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  779. esac], [zstd=auto])
  780. if test "x$enable_zstd" = "xno"; then
  781. have_zstd=no;
  782. else
  783. PKG_CHECK_MODULES([ZSTD],
  784. [libzstd >= 1.1],
  785. have_zstd=yes,
  786. have_zstd=no)
  787. if test "x$have_zstd" = "xno" ; then
  788. AC_MSG_WARN([Unable to find libzstd.])
  789. fi
  790. fi
  791. if test "x$have_zstd" = "xyes"; then
  792. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  793. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  794. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  795. fi
  796. AC_SUBST(TOR_ZSTD_CFLAGS)
  797. AC_SUBST(TOR_ZSTD_LIBS)
  798. dnl ----------------------------------------------------------------------
  799. dnl Check if libcap is available for capabilities.
  800. tor_cap_pkg_debian="libcap2"
  801. tor_cap_pkg_redhat="libcap"
  802. tor_cap_devpkg_debian="libcap-dev"
  803. tor_cap_devpkg_redhat="libcap-devel"
  804. AC_CHECK_LIB([cap], [cap_init], [],
  805. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  806. )
  807. AC_CHECK_FUNCS(cap_set_proc)
  808. dnl ---------------------------------------------------------------------
  809. dnl Now that we know about our major libraries, we can check for compiler
  810. dnl and linker hardening options. We need to do this with the libraries known,
  811. dnl since sometimes the linker will like an option but not be willing to
  812. dnl use it with a build of a library.
  813. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  814. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  815. CFLAGS_FTRAPV=
  816. CFLAGS_FWRAPV=
  817. CFLAGS_ASAN=
  818. CFLAGS_UBSAN=
  819. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  820. #if !defined(__clang__)
  821. #error
  822. #endif])], have_clang=yes, have_clang=no)
  823. if test "x$enable_gcc_hardening" != "xno"; then
  824. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  825. if test "x$have_clang" = "xyes"; then
  826. TOR_CHECK_CFLAGS(-Qunused-arguments)
  827. fi
  828. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  829. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  830. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  831. m4_ifdef([AS_VAR_IF],[
  832. AS_VAR_IF(can_compile, [yes],
  833. AS_VAR_IF(can_link, [yes],
  834. [],
  835. 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.)]))
  836. )])
  837. AS_VAR_POPDEF([can_link])
  838. AS_VAR_POPDEF([can_compile])
  839. TOR_CHECK_CFLAGS(-Wstack-protector)
  840. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  841. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  842. TOR_CHECK_CFLAGS(-fPIE)
  843. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  844. fi
  845. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  846. fi
  847. if test "$fragile_hardening" = "yes"; then
  848. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  849. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  850. 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.])
  851. fi
  852. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  853. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  854. fi
  855. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  856. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  857. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  858. fi
  859. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  860. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  861. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  862. fi
  863. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  864. fi
  865. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  866. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  867. mulodi_fixes_ftrapv=no
  868. if test "$have_clang" = "yes"; then
  869. saved_CFLAGS="$CFLAGS"
  870. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  871. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  872. AC_LINK_IFELSE([
  873. AC_LANG_SOURCE([[
  874. #include <stdint.h>
  875. #include <stdlib.h>
  876. int main(int argc, char **argv)
  877. {
  878. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  879. * (int64_t)atoi(argv[3]);
  880. return x == 9;
  881. } ]])],
  882. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  883. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  884. if test "$ftrapv_can_link" = "no"; then
  885. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  886. AC_LINK_IFELSE([
  887. AC_LANG_SOURCE([[
  888. #include <stdint.h>
  889. #include <stdlib.h>
  890. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  891. *overflow=0;
  892. return a;
  893. }
  894. int main(int argc, char **argv)
  895. {
  896. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  897. * (int64_t)atoi(argv[3]);
  898. return x == 9;
  899. } ]])],
  900. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  901. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  902. fi
  903. CFLAGS="$saved_CFLAGS"
  904. fi
  905. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  906. dnl These cflags add bunches of branches, and we haven't been able to
  907. dnl persuade ourselves that they're suitable for code that needs to be
  908. dnl constant time.
  909. AC_SUBST(CFLAGS_BUGTRAP)
  910. dnl These cflags are variant ones sutable for code that needs to be
  911. dnl constant-time.
  912. AC_SUBST(CFLAGS_CONSTTIME)
  913. if test "x$enable_linker_hardening" != "xno"; then
  914. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  915. fi
  916. # For backtrace support
  917. TOR_CHECK_LDFLAGS(-rdynamic)
  918. dnl ------------------------------------------------------
  919. dnl Now see if we have a -fomit-frame-pointer compiler option.
  920. saved_CFLAGS="$CFLAGS"
  921. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  922. F_OMIT_FRAME_POINTER=''
  923. if test "$saved_CFLAGS" != "$CFLAGS"; then
  924. if test "$fragile_hardening" = "yes"; then
  925. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  926. fi
  927. fi
  928. CFLAGS="$saved_CFLAGS"
  929. AC_SUBST(F_OMIT_FRAME_POINTER)
  930. dnl ------------------------------------------------------
  931. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  932. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  933. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  934. dnl code will work.
  935. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  936. dnl ============================================================
  937. dnl Check for libseccomp
  938. if test "x$enable_seccomp" != "xno"; then
  939. AC_CHECK_HEADERS([seccomp.h])
  940. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  941. fi
  942. dnl ============================================================
  943. dnl Check for libscrypt
  944. if test "x$enable_libscrypt" != "xno"; then
  945. AC_CHECK_HEADERS([libscrypt.h])
  946. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  947. AC_CHECK_FUNCS([libscrypt_scrypt])
  948. fi
  949. dnl ============================================================
  950. dnl We need an implementation of curve25519.
  951. dnl set these defaults.
  952. build_curve25519_donna=no
  953. build_curve25519_donna_c64=no
  954. use_curve25519_donna=no
  955. use_curve25519_nacl=no
  956. CURVE25519_LIBS=
  957. dnl The best choice is using curve25519-donna-c64, but that requires
  958. dnl that we
  959. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  960. tor_cv_can_use_curve25519_donna_c64,
  961. [AC_RUN_IFELSE(
  962. [AC_LANG_PROGRAM([dnl
  963. #include <stdint.h>
  964. typedef unsigned uint128_t __attribute__((mode(TI)));
  965. int func(uint64_t a, uint64_t b) {
  966. uint128_t c = ((uint128_t)a) * b;
  967. int ok = ((uint64_t)(c>>96)) == 522859 &&
  968. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  969. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  970. (((uint64_t)(c))&0xffffffffL) == 0;
  971. return ok;
  972. }
  973. ], [dnl
  974. int ok = func( ((uint64_t)2000000000) * 1000000000,
  975. ((uint64_t)1234567890) << 24);
  976. return !ok;
  977. ])],
  978. [tor_cv_can_use_curve25519_donna_c64=yes],
  979. [tor_cv_can_use_curve25519_donna_c64=no],
  980. [AC_LINK_IFELSE(
  981. [AC_LANG_PROGRAM([dnl
  982. #include <stdint.h>
  983. typedef unsigned uint128_t __attribute__((mode(TI)));
  984. int func(uint64_t a, uint64_t b) {
  985. uint128_t c = ((uint128_t)a) * b;
  986. int ok = ((uint64_t)(c>>96)) == 522859 &&
  987. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  988. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  989. (((uint64_t)(c))&0xffffffffL) == 0;
  990. return ok;
  991. }
  992. ], [dnl
  993. int ok = func( ((uint64_t)2000000000) * 1000000000,
  994. ((uint64_t)1234567890) << 24);
  995. return !ok;
  996. ])],
  997. [tor_cv_can_use_curve25519_donna_c64=cross],
  998. [tor_cv_can_use_curve25519_donna_c64=no])])])
  999. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1000. nacl/crypto_scalarmult_curve25519.h])
  1001. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1002. tor_cv_can_use_curve25519_nacl,
  1003. [tor_saved_LIBS="$LIBS"
  1004. LIBS="$LIBS -lnacl"
  1005. AC_LINK_IFELSE(
  1006. [AC_LANG_PROGRAM([dnl
  1007. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1008. #include <crypto_scalarmult_curve25519.h>
  1009. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1010. #include <nacl/crypto_scalarmult_curve25519.h>
  1011. #endif
  1012. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1013. #error Hey, this is the reference implementation! That's not fast.
  1014. #endif
  1015. ], [
  1016. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1017. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1018. [tor_cv_can_use_curve25519_nacl=no])
  1019. LIBS="$tor_saved_LIBS" ])
  1020. dnl Okay, now we need to figure out which one to actually use. Fall back
  1021. dnl to curve25519-donna.c
  1022. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1023. build_curve25519_donna_c64=yes
  1024. use_curve25519_donna=yes
  1025. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1026. use_curve25519_nacl=yes
  1027. CURVE25519_LIBS=-lnacl
  1028. else
  1029. build_curve25519_donna=yes
  1030. use_curve25519_donna=yes
  1031. fi
  1032. if test "x$use_curve25519_donna" = "xyes"; then
  1033. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1034. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1035. fi
  1036. if test "x$use_curve25519_nacl" = "xyes"; then
  1037. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1038. [Defined if we should use a curve25519 from nacl])
  1039. fi
  1040. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1041. test "x$build_curve25519_donna" = "xyes")
  1042. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1043. test "x$build_curve25519_donna_c64" = "xyes")
  1044. AC_SUBST(CURVE25519_LIBS)
  1045. dnl Make sure to enable support for large off_t if available.
  1046. AC_SYS_LARGEFILE
  1047. AC_CHECK_HEADERS([assert.h \
  1048. errno.h \
  1049. fcntl.h \
  1050. signal.h \
  1051. string.h \
  1052. sys/capability.h \
  1053. sys/fcntl.h \
  1054. sys/stat.h \
  1055. sys/time.h \
  1056. sys/types.h \
  1057. time.h \
  1058. unistd.h \
  1059. arpa/inet.h \
  1060. crt_externs.h \
  1061. execinfo.h \
  1062. gnu/libc-version.h \
  1063. grp.h \
  1064. ifaddrs.h \
  1065. inttypes.h \
  1066. limits.h \
  1067. linux/types.h \
  1068. machine/limits.h \
  1069. malloc.h \
  1070. malloc/malloc.h \
  1071. malloc_np.h \
  1072. netdb.h \
  1073. netinet/in.h \
  1074. netinet/in6.h \
  1075. pwd.h \
  1076. readpassphrase.h \
  1077. stdint.h \
  1078. sys/eventfd.h \
  1079. sys/file.h \
  1080. sys/ioctl.h \
  1081. sys/limits.h \
  1082. sys/mman.h \
  1083. sys/param.h \
  1084. sys/prctl.h \
  1085. sys/random.h \
  1086. sys/resource.h \
  1087. sys/select.h \
  1088. sys/socket.h \
  1089. sys/statvfs.h \
  1090. sys/syscall.h \
  1091. sys/sysctl.h \
  1092. sys/syslimits.h \
  1093. sys/time.h \
  1094. sys/types.h \
  1095. sys/un.h \
  1096. sys/utime.h \
  1097. sys/wait.h \
  1098. syslog.h \
  1099. utime.h])
  1100. AC_CHECK_HEADERS(sys/param.h)
  1101. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1102. [#ifdef HAVE_SYS_TYPES_H
  1103. #include <sys/types.h>
  1104. #endif
  1105. #ifdef HAVE_SYS_SOCKET_H
  1106. #include <sys/socket.h>
  1107. #endif])
  1108. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1109. [#ifdef HAVE_SYS_TYPES_H
  1110. #include <sys/types.h>
  1111. #endif
  1112. #ifdef HAVE_SYS_SOCKET_H
  1113. #include <sys/socket.h>
  1114. #endif
  1115. #ifdef HAVE_NET_IF_H
  1116. #include <net/if.h>
  1117. #endif
  1118. #ifdef HAVE_NETINET_IN_H
  1119. #include <netinet/in.h>
  1120. #endif])
  1121. AC_CHECK_HEADERS(linux/if.h,[],[],
  1122. [
  1123. #ifdef HAVE_SYS_SOCKET_H
  1124. #include <sys/socket.h>
  1125. #endif
  1126. ])
  1127. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1128. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1129. [#ifdef HAVE_SYS_TYPES_H
  1130. #include <sys/types.h>
  1131. #endif
  1132. #ifdef HAVE_SYS_SOCKET_H
  1133. #include <sys/socket.h>
  1134. #endif
  1135. #ifdef HAVE_LIMITS_H
  1136. #include <limits.h>
  1137. #endif
  1138. #ifdef HAVE_LINUX_TYPES_H
  1139. #include <linux/types.h>
  1140. #endif
  1141. #ifdef HAVE_NETINET_IN6_H
  1142. #include <netinet/in6.h>
  1143. #endif
  1144. #ifdef HAVE_NETINET_IN_H
  1145. #include <netinet/in.h>
  1146. #endif])
  1147. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1148. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1149. [#ifdef HAVE_SYS_TYPES_H
  1150. #include <sys/types.h>
  1151. #endif
  1152. #ifdef HAVE_SYS_SOCKET_H
  1153. #include <sys/socket.h>
  1154. #endif
  1155. #ifdef HAVE_LIMITS_H
  1156. #include <limits.h>
  1157. #endif
  1158. #ifdef HAVE_LINUX_TYPES_H
  1159. #include <linux/types.h>
  1160. #endif
  1161. #ifdef HAVE_NETINET_IN6_H
  1162. #include <netinet/in6.h>
  1163. #endif
  1164. #ifdef HAVE_NETINET_IN_H
  1165. #include <netinet/in.h>
  1166. #endif
  1167. #ifdef HAVE_LINUX_IF_H
  1168. #include <linux/if.h>
  1169. #endif])
  1170. transparent_ok=0
  1171. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1172. transparent_ok=1
  1173. fi
  1174. if test "x$linux_netfilter_ipv4" = "x1"; then
  1175. transparent_ok=1
  1176. fi
  1177. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1178. transparent_ok=1
  1179. fi
  1180. if test "x$transparent_ok" = "x1"; then
  1181. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1182. else
  1183. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1184. fi
  1185. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1186. [#ifdef HAVE_SYS_TYPES_H
  1187. #include <sys/types.h>
  1188. #endif
  1189. #ifdef HAVE_SYS_TIME_H
  1190. #include <sys/time.h>
  1191. #endif])
  1192. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1193. dnl Watch out.
  1194. AC_CHECK_SIZEOF(int8_t)
  1195. AC_CHECK_SIZEOF(int16_t)
  1196. AC_CHECK_SIZEOF(int32_t)
  1197. AC_CHECK_SIZEOF(int64_t)
  1198. AC_CHECK_SIZEOF(uint8_t)
  1199. AC_CHECK_SIZEOF(uint16_t)
  1200. AC_CHECK_SIZEOF(uint32_t)
  1201. AC_CHECK_SIZEOF(uint64_t)
  1202. AC_CHECK_SIZEOF(intptr_t)
  1203. AC_CHECK_SIZEOF(uintptr_t)
  1204. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1205. AC_CHECK_SIZEOF(char)
  1206. AC_CHECK_SIZEOF(short)
  1207. AC_CHECK_SIZEOF(int)
  1208. AC_CHECK_SIZEOF(long)
  1209. AC_CHECK_SIZEOF(long long)
  1210. AC_CHECK_SIZEOF(__int64)
  1211. AC_CHECK_SIZEOF(void *)
  1212. AC_CHECK_SIZEOF(time_t)
  1213. AC_CHECK_SIZEOF(size_t)
  1214. AC_CHECK_SIZEOF(pid_t)
  1215. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1216. AC_PC_FROM_UCONTEXT([:])
  1217. dnl used to include sockaddr_storage, but everybody has that.
  1218. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1219. [#ifdef HAVE_SYS_TYPES_H
  1220. #include <sys/types.h>
  1221. #endif
  1222. #ifdef HAVE_NETINET_IN_H
  1223. #include <netinet/in.h>
  1224. #endif
  1225. #ifdef HAVE_NETINET_IN6_H
  1226. #include <netinet/in6.h>
  1227. #endif
  1228. #ifdef HAVE_SYS_SOCKET_H
  1229. #include <sys/socket.h>
  1230. #endif
  1231. #ifdef _WIN32
  1232. #define _WIN32_WINNT 0x0501
  1233. #define WIN32_LEAN_AND_MEAN
  1234. #include <winsock2.h>
  1235. #include <ws2tcpip.h>
  1236. #endif
  1237. ])
  1238. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1239. [#ifdef HAVE_SYS_TYPES_H
  1240. #include <sys/types.h>
  1241. #endif
  1242. #ifdef HAVE_NETINET_IN_H
  1243. #include <netinet/in.h>
  1244. #endif
  1245. #ifdef HAVE_NETINET_IN6_H
  1246. #include <netinet/in6.h>
  1247. #endif
  1248. #ifdef HAVE_SYS_SOCKET_H
  1249. #include <sys/socket.h>
  1250. #endif
  1251. #ifdef _WIN32
  1252. #define _WIN32_WINNT 0x0501
  1253. #define WIN32_LEAN_AND_MEAN
  1254. #include <winsock2.h>
  1255. #include <ws2tcpip.h>
  1256. #endif
  1257. ])
  1258. AC_CHECK_TYPES([rlim_t], , ,
  1259. [#ifdef HAVE_SYS_TYPES_H
  1260. #include <sys/types.h>
  1261. #endif
  1262. #ifdef HAVE_SYS_TIME_H
  1263. #include <sys/time.h>
  1264. #endif
  1265. #ifdef HAVE_SYS_RESOURCE_H
  1266. #include <sys/resource.h>
  1267. #endif
  1268. ])
  1269. AX_CHECK_SIGN([time_t],
  1270. [ : ],
  1271. [ : ], [
  1272. #ifdef HAVE_SYS_TYPES_H
  1273. #include <sys/types.h>
  1274. #endif
  1275. #ifdef HAVE_SYS_TIME_H
  1276. #include <sys/time.h>
  1277. #endif
  1278. #ifdef HAVE_TIME_H
  1279. #include <time.h>
  1280. #endif
  1281. ])
  1282. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1283. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1284. fi
  1285. AX_CHECK_SIGN([size_t],
  1286. [ tor_cv_size_t_signed=yes ],
  1287. [ tor_cv_size_t_signed=no ], [
  1288. #ifdef HAVE_SYS_TYPES_H
  1289. #include <sys/types.h>
  1290. #endif
  1291. ])
  1292. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1293. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1294. fi
  1295. AX_CHECK_SIGN([enum always],
  1296. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1297. [ : ], [
  1298. enum always { AAA, BBB, CCC };
  1299. ])
  1300. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1301. #ifdef HAVE_SYS_SOCKET_H
  1302. #include <sys/socket.h>
  1303. #endif
  1304. ])
  1305. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1306. AC_CHECK_SIZEOF(cell_t)
  1307. # Now make sure that NULL can be represented as zero bytes.
  1308. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  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 () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1317. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1318. [tor_cv_null_is_zero=yes],
  1319. [tor_cv_null_is_zero=no],
  1320. [tor_cv_null_is_zero=cross])])
  1321. if test "$tor_cv_null_is_zero" = "cross"; then
  1322. # Cross-compiling; let's hope that the target isn't raving mad.
  1323. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1324. fi
  1325. if test "$tor_cv_null_is_zero" != "no"; then
  1326. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1327. [Define to 1 iff memset(0) sets pointers to NULL])
  1328. fi
  1329. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1330. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1331. [[#include <stdlib.h>
  1332. #include <string.h>
  1333. #include <stdio.h>
  1334. #ifdef HAVE_STDDEF_H
  1335. #include <stddef.h>
  1336. #endif
  1337. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1338. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1339. [tor_cv_dbl0_is_zero=yes],
  1340. [tor_cv_dbl0_is_zero=no],
  1341. [tor_cv_dbl0_is_zero=cross])])
  1342. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1343. # Cross-compiling; let's hope that the target isn't raving mad.
  1344. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1345. fi
  1346. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1347. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1348. [Define to 1 iff memset(0) sets doubles to 0.0])
  1349. fi
  1350. # And what happens when we malloc zero?
  1351. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1352. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1353. [[#include <stdlib.h>
  1354. #include <string.h>
  1355. #include <stdio.h>
  1356. #ifdef HAVE_STDDEF_H
  1357. #include <stddef.h>
  1358. #endif
  1359. int main () { return malloc(0)?0:1; }]])],
  1360. [tor_cv_malloc_zero_works=yes],
  1361. [tor_cv_malloc_zero_works=no],
  1362. [tor_cv_malloc_zero_works=cross])])
  1363. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1364. # Cross-compiling; let's hope that the target isn't raving mad.
  1365. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1366. fi
  1367. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1368. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1369. [Define to 1 iff malloc(0) returns a pointer])
  1370. fi
  1371. # whether we seem to be in a 2s-complement world.
  1372. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1373. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1374. [[int main () { int problem = ((-99) != (~99)+1);
  1375. return problem ? 1 : 0; }]])],
  1376. [tor_cv_twos_complement=yes],
  1377. [tor_cv_twos_complement=no],
  1378. [tor_cv_twos_complement=cross])])
  1379. if test "$tor_cv_twos_complement" = "cross"; then
  1380. # Cross-compiling; let's hope that the target isn't raving mad.
  1381. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1382. fi
  1383. if test "$tor_cv_twos_complement" != "no"; then
  1384. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1385. [Define to 1 iff we represent negative integers with
  1386. two's complement])
  1387. fi
  1388. # What does shifting a negative value do?
  1389. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1390. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1391. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1392. [tor_cv_sign_extend=yes],
  1393. [tor_cv_sign_extend=no],
  1394. [tor_cv_sign_extend=cross])])
  1395. if test "$tor_cv_sign_extend" = "cross"; then
  1396. # Cross-compiling; let's hope that the target isn't raving mad.
  1397. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1398. fi
  1399. if test "$tor_cv_sign_extend" != "no"; then
  1400. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1401. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1402. fi
  1403. # Is uint8_t the same type as unsigned char?
  1404. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1405. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1406. #include <stdint.h>
  1407. extern uint8_t c;
  1408. unsigned char c;]])],
  1409. [tor_cv_uint8_uchar=yes],
  1410. [tor_cv_uint8_uchar=no],
  1411. [tor_cv_uint8_uchar=cross])])
  1412. if test "$tor_cv_uint8_uchar" = "cross"; then
  1413. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1414. fi
  1415. if test "$tor_cv_uint8_uchar" = "no"; then
  1416. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1417. fi
  1418. # Whether we should use the dmalloc memory allocation debugging library.
  1419. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1420. AC_ARG_WITH(dmalloc,
  1421. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1422. [if [[ "$withval" = "yes" ]]; then
  1423. dmalloc=1
  1424. AC_MSG_RESULT(yes)
  1425. else
  1426. dmalloc=1
  1427. AC_MSG_RESULT(no)
  1428. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1429. )
  1430. if [[ $dmalloc -eq 1 ]]; then
  1431. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1432. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1433. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1434. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1435. fi
  1436. AC_ARG_WITH(tcmalloc,
  1437. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1438. [ tcmalloc=yes ], [ tcmalloc=no ])
  1439. if test "x$tcmalloc" = "xyes"; then
  1440. LDFLAGS="-ltcmalloc $LDFLAGS"
  1441. fi
  1442. using_custom_malloc=no
  1443. if test "x$enable_openbsd_malloc" = "xyes"; then
  1444. using_custom_malloc=yes
  1445. fi
  1446. if test "x$tcmalloc" = "xyes"; then
  1447. using_custom_malloc=yes
  1448. fi
  1449. if test "$using_custom_malloc" = "no"; then
  1450. AC_CHECK_FUNCS(mallinfo)
  1451. fi
  1452. # By default, we're going to assume we don't have mlockall()
  1453. # bionic and other platforms have various broken mlockall subsystems.
  1454. # Some systems don't have a working mlockall, some aren't linkable,
  1455. # and some have it but don't declare it.
  1456. AC_CHECK_FUNCS(mlockall)
  1457. AC_CHECK_DECLS([mlockall], , , [
  1458. #ifdef HAVE_SYS_MMAN_H
  1459. #include <sys/mman.h>
  1460. #endif])
  1461. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1462. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1463. # using macros
  1464. AC_CHECK_DECLS([getpagesize], , , [
  1465. #ifdef HAVE_UNISTD_H
  1466. #include <unistd.h>
  1467. #endif])
  1468. # Allow user to specify an alternate syslog facility
  1469. AC_ARG_WITH(syslog-facility,
  1470. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1471. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1472. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1473. AC_SUBST(LOGFACILITY)
  1474. # Check if we have getresuid and getresgid
  1475. AC_CHECK_FUNCS(getresuid getresgid)
  1476. # Check for gethostbyname_r in all its glorious incompatible versions.
  1477. # (This logic is based on that in Python's configure.in)
  1478. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1479. [Define this if you have any gethostbyname_r()])
  1480. AC_CHECK_FUNC(gethostbyname_r, [
  1481. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1482. OLD_CFLAGS=$CFLAGS
  1483. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1484. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1485. #include <netdb.h>
  1486. ]], [[
  1487. char *cp1, *cp2;
  1488. struct hostent *h1, *h2;
  1489. int i1, i2;
  1490. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1491. ]])],[
  1492. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1493. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1494. [Define this if gethostbyname_r takes 6 arguments])
  1495. AC_MSG_RESULT(6)
  1496. ], [
  1497. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1498. #include <netdb.h>
  1499. ]], [[
  1500. char *cp1, *cp2;
  1501. struct hostent *h1;
  1502. int i1, i2;
  1503. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1504. ]])], [
  1505. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1506. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1507. [Define this if gethostbyname_r takes 5 arguments])
  1508. AC_MSG_RESULT(5)
  1509. ], [
  1510. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1511. #include <netdb.h>
  1512. ]], [[
  1513. char *cp1;
  1514. struct hostent *h1;
  1515. struct hostent_data hd;
  1516. (void) gethostbyname_r(cp1,h1,&hd);
  1517. ]])], [
  1518. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1519. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1520. [Define this if gethostbyname_r takes 3 arguments])
  1521. AC_MSG_RESULT(3)
  1522. ], [
  1523. AC_MSG_RESULT(0)
  1524. ])
  1525. ])
  1526. ])
  1527. CFLAGS=$OLD_CFLAGS
  1528. ])
  1529. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1530. tor_cv_have_func_macro,
  1531. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1532. #include <stdio.h>
  1533. int main(int c, char **v) { puts(__func__); }])],
  1534. tor_cv_have_func_macro=yes,
  1535. tor_cv_have_func_macro=no))
  1536. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1537. tor_cv_have_FUNC_macro,
  1538. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1539. #include <stdio.h>
  1540. int main(int c, char **v) { puts(__FUNC__); }])],
  1541. tor_cv_have_FUNC_macro=yes,
  1542. tor_cv_have_FUNC_macro=no))
  1543. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1544. tor_cv_have_FUNCTION_macro,
  1545. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1546. #include <stdio.h>
  1547. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1548. tor_cv_have_FUNCTION_macro=yes,
  1549. tor_cv_have_FUNCTION_macro=no))
  1550. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1551. tor_cv_have_environ_declared,
  1552. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1553. #ifdef HAVE_UNISTD_H
  1554. #include <unistd.h>
  1555. #endif
  1556. #include <stdlib.h>
  1557. int main(int c, char **v) { char **t = environ; }])],
  1558. tor_cv_have_environ_declared=yes,
  1559. tor_cv_have_environ_declared=no))
  1560. if test "$tor_cv_have_func_macro" = "yes"; then
  1561. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1562. fi
  1563. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1564. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1565. fi
  1566. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1567. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1568. [Defined if the compiler supports __FUNCTION__])
  1569. fi
  1570. if test "$tor_cv_have_environ_declared" = "yes"; then
  1571. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1572. [Defined if we have extern char **environ already declared])
  1573. fi
  1574. # $prefix stores the value of the --prefix command line option, or
  1575. # NONE if the option wasn't set. In the case that it wasn't set, make
  1576. # it be the default, so that we can use it to expand directories now.
  1577. if test "x$prefix" = "xNONE"; then
  1578. prefix=$ac_default_prefix
  1579. fi
  1580. # and similarly for $exec_prefix
  1581. if test "x$exec_prefix" = "xNONE"; then
  1582. exec_prefix=$prefix
  1583. fi
  1584. if test "x$BUILDDIR" = "x"; then
  1585. BUILDDIR=`pwd`
  1586. fi
  1587. AC_SUBST(BUILDDIR)
  1588. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1589. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1590. if test "x$CONFDIR" = "x"; then
  1591. CONFDIR=`eval echo $sysconfdir/tor`
  1592. fi
  1593. AC_SUBST(CONFDIR)
  1594. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1595. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1596. BINDIR=`eval echo $bindir`
  1597. AC_SUBST(BINDIR)
  1598. LOCALSTATEDIR=`eval echo $localstatedir`
  1599. AC_SUBST(LOCALSTATEDIR)
  1600. if test "$bwin32" = "true"; then
  1601. # Test if the linker supports the --nxcompat and --dynamicbase options
  1602. # for Windows
  1603. save_LDFLAGS="$LDFLAGS"
  1604. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1605. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1606. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1607. [AC_MSG_RESULT([yes])]
  1608. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1609. [AC_MSG_RESULT([no])]
  1610. )
  1611. LDFLAGS="$save_LDFLAGS"
  1612. fi
  1613. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1614. # than autoconf's macros like.
  1615. if test "$GCC" = "yes"; then
  1616. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1617. # accident waiting to happen.
  1618. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1619. else
  1620. # Override optimization level for non-gcc compilers
  1621. CFLAGS="$CFLAGS -O"
  1622. enable_gcc_warnings=no
  1623. enable_gcc_warnings_advisory=no
  1624. fi
  1625. # Warnings implies advisory-warnings and -Werror.
  1626. if test "$enable_gcc_warnings" = "yes"; then
  1627. enable_gcc_warnings_advisory=yes
  1628. enable_fatal_warnings=yes
  1629. fi
  1630. # OS X Lion started deprecating the system openssl. Let's just disable
  1631. # all deprecation warnings on OS X. Also, to potentially make the binary
  1632. # a little smaller, let's enable dead_strip.
  1633. case "$host_os" in
  1634. darwin*)
  1635. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1636. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1637. esac
  1638. # Add some more warnings which we use in development but not in the
  1639. # released versions. (Some relevant gcc versions can't handle these.)
  1640. #
  1641. # Note that we have to do this near the end of the autoconf process, or
  1642. # else we may run into problems when these warnings hit on the testing C
  1643. # programs that autoconf wants to build.
  1644. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1645. case "$host" in
  1646. *-*-openbsd* | *-*-bitrig*)
  1647. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1648. # That's fine, except that the headers don't pass -Wredundant-decls.
  1649. # Therefore, let's disable -Wsystem-headers when we're building
  1650. # with maximal warnings on OpenBSD.
  1651. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1652. esac
  1653. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1654. # have it work better.
  1655. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1656. # This warning was added in gcc 4.3, but it appears to generate
  1657. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1658. #CFLAGS="$CFLAGS -Wlogical-op"
  1659. m4_foreach_w([warning_flag], [
  1660. -Waddress
  1661. -Waddress-of-array-temporary
  1662. -Waddress-of-temporary
  1663. -Wambiguous-macro
  1664. -Wanonymous-pack-parens
  1665. -Warc
  1666. -Warc-abi
  1667. -Warc-bridge-casts-disallowed-in-nonarc
  1668. -Warc-maybe-repeated-use-of-weak
  1669. -Warc-performSelector-leaks
  1670. -Warc-repeated-use-of-weak
  1671. -Warray-bounds
  1672. -Warray-bounds-pointer-arithmetic
  1673. -Wasm
  1674. -Wasm-operand-widths
  1675. -Watomic-properties
  1676. -Watomic-property-with-user-defined-accessor
  1677. -Wauto-import
  1678. -Wauto-storage-class
  1679. -Wauto-var-id
  1680. -Wavailability
  1681. -Wbackslash-newline-escape
  1682. -Wbad-array-new-length
  1683. -Wbind-to-temporary-copy
  1684. -Wbitfield-constant-conversion
  1685. -Wbool-conversion
  1686. -Wbool-conversions
  1687. -Wbuiltin-requires-header
  1688. -Wchar-align
  1689. -Wcompare-distinct-pointer-types
  1690. -Wcomplex-component-init
  1691. -Wconditional-type-mismatch
  1692. -Wconfig-macros
  1693. -Wconstant-conversion
  1694. -Wconstant-logical-operand
  1695. -Wconstexpr-not-const
  1696. -Wcustom-atomic-properties
  1697. -Wdangling-field
  1698. -Wdangling-initializer-list
  1699. -Wdate-time
  1700. -Wdelegating-ctor-cycles
  1701. -Wdeprecated-implementations
  1702. -Wdeprecated-register
  1703. -Wdirect-ivar-access
  1704. -Wdiscard-qual
  1705. -Wdistributed-object-modifiers
  1706. -Wdivision-by-zero
  1707. -Wdollar-in-identifier-extension
  1708. -Wdouble-promotion
  1709. -Wduplicate-decl-specifier
  1710. -Wduplicate-enum
  1711. -Wduplicate-method-arg
  1712. -Wduplicate-method-match
  1713. -Wduplicated-cond
  1714. -Wdynamic-class-memaccess
  1715. -Wembedded-directive
  1716. -Wempty-translation-unit
  1717. -Wenum-conversion
  1718. -Wexit-time-destructors
  1719. -Wexplicit-ownership-type
  1720. -Wextern-initializer
  1721. -Wextra
  1722. -Wextra-semi
  1723. -Wextra-tokens
  1724. -Wflexible-array-extensions
  1725. -Wfloat-conversion
  1726. -Wformat-non-iso
  1727. -Wfour-char-constants
  1728. -Wgcc-compat
  1729. -Wglobal-constructors
  1730. -Wgnu-array-member-paren-init
  1731. -Wgnu-designator
  1732. -Wgnu-static-float-init
  1733. -Wheader-guard
  1734. -Wheader-hygiene
  1735. -Widiomatic-parentheses
  1736. -Wignored-attributes
  1737. -Wimplicit-atomic-properties
  1738. -Wimplicit-conversion-floating-point-to-bool
  1739. -Wimplicit-exception-spec-mismatch
  1740. -Wimplicit-fallthrough
  1741. -Wimplicit-fallthrough-per-function
  1742. -Wimplicit-retain-self
  1743. -Wimport-preprocessor-directive-pedantic
  1744. -Wincompatible-library-redeclaration
  1745. -Wincompatible-pointer-types-discards-qualifiers
  1746. -Wincomplete-implementation
  1747. -Wincomplete-module
  1748. -Wincomplete-umbrella
  1749. -Winit-self
  1750. -Wint-conversions
  1751. -Wint-to-void-pointer-cast
  1752. -Winteger-overflow
  1753. -Winvalid-constexpr
  1754. -Winvalid-iboutlet
  1755. -Winvalid-noreturn
  1756. -Winvalid-pp-token
  1757. -Winvalid-source-encoding
  1758. -Winvalid-token-paste
  1759. -Wknr-promoted-parameter
  1760. -Wlanguage-extension-token
  1761. -Wlarge-by-value-copy
  1762. -Wliteral-conversion
  1763. -Wliteral-range
  1764. -Wlocal-type-template-args
  1765. -Wlogical-op
  1766. -Wloop-analysis
  1767. -Wmain-return-type
  1768. -Wmalformed-warning-check
  1769. -Wmethod-signatures
  1770. -Wmicrosoft
  1771. -Wmicrosoft-exists
  1772. -Wmismatched-parameter-types
  1773. -Wmismatched-return-types
  1774. -Wmissing-field-initializers
  1775. -Wmissing-format-attribute
  1776. -Wmissing-noreturn
  1777. -Wmissing-selector-name
  1778. -Wmissing-sysroot
  1779. -Wmissing-variable-declarations
  1780. -Wmodule-conflict
  1781. -Wnested-anon-types
  1782. -Wnewline-eof
  1783. -Wnon-literal-null-conversion
  1784. -Wnon-pod-varargs
  1785. -Wnonportable-cfstrings
  1786. -Wnormalized=id
  1787. -Wnull-arithmetic
  1788. -Wnull-character
  1789. -Wnull-conversion
  1790. -Wnull-dereference
  1791. -Wout-of-line-declaration
  1792. -Wover-aligned
  1793. -Woverlength-strings
  1794. -Woverride-init
  1795. -Woverriding-method-mismatch
  1796. -Wpointer-type-mismatch
  1797. -Wpredefined-identifier-outside-function
  1798. -Wprotocol-property-synthesis-ambiguity
  1799. -Wreadonly-iboutlet-property
  1800. -Wreadonly-setter-attrs
  1801. -Wreceiver-expr
  1802. -Wreceiver-forward-class
  1803. -Wreceiver-is-weak
  1804. -Wreinterpret-base-class
  1805. -Wrequires-super-attribute
  1806. -Wreserved-user-defined-literal
  1807. -Wreturn-stack-address
  1808. -Wsection
  1809. -Wselector-type-mismatch
  1810. -Wsentinel
  1811. -Wserialized-diagnostics
  1812. -Wshadow
  1813. -Wshift-count-negative
  1814. -Wshift-count-overflow
  1815. -Wshift-negative-value
  1816. -Wshift-overflow=2
  1817. -Wshift-sign-overflow
  1818. -Wshorten-64-to-32
  1819. -Wsizeof-array-argument
  1820. -Wsource-uses-openmp
  1821. -Wstatic-float-init
  1822. -Wstatic-in-inline
  1823. -Wstatic-local-in-inline
  1824. -Wstrict-overflow=1
  1825. -Wstring-compare
  1826. -Wstring-conversion
  1827. -Wstrlcpy-strlcat-size
  1828. -Wstrncat-size
  1829. -Wsuggest-attribute=format
  1830. -Wsuggest-attribute=noreturn
  1831. -Wsuper-class-method-mismatch
  1832. -Wswitch-bool
  1833. -Wsync-nand
  1834. -Wtautological-constant-out-of-range-compare
  1835. -Wtentative-definition-incomplete-type
  1836. -Wtrampolines
  1837. -Wtype-safety
  1838. -Wtypedef-redefinition
  1839. -Wtypename-missing
  1840. -Wundefined-inline
  1841. -Wundefined-internal
  1842. -Wundefined-reinterpret-cast
  1843. -Wunicode
  1844. -Wunicode-whitespace
  1845. -Wunknown-warning-option
  1846. -Wunnamed-type-template-args
  1847. -Wunneeded-member-function
  1848. -Wunsequenced
  1849. -Wunsupported-visibility
  1850. -Wunused-but-set-parameter
  1851. -Wunused-but-set-variable
  1852. -Wunused-command-line-argument
  1853. -Wunused-const-variable=2
  1854. -Wunused-exception-parameter
  1855. -Wunused-local-typedefs
  1856. -Wunused-member-function
  1857. -Wunused-sanitize-argument
  1858. -Wunused-volatile-lvalue
  1859. -Wuser-defined-literals
  1860. -Wvariadic-macros
  1861. -Wvector-conversion
  1862. -Wvector-conversions
  1863. -Wvexing-parse
  1864. -Wvisibility
  1865. -Wvla-extension
  1866. -Wzero-length-array
  1867. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1868. dnl We should re-enable this in some later version. Clang doesn't
  1869. dnl mind, but it causes trouble with GCC.
  1870. dnl -Wstrict-overflow=2
  1871. dnl These seem to require annotations that we don't currently use,
  1872. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1873. dnl -Wthread-safety
  1874. dnl -Wthread-safety-analysis
  1875. dnl -Wthread-safety-attributes
  1876. dnl -Wthread-safety-beta
  1877. dnl -Wthread-safety-precise
  1878. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1879. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1880. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1881. CFLAGS="$CFLAGS -Wwrite-strings"
  1882. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1883. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1884. CFLAGS="$CFLAGS -Wunused-parameter "
  1885. # These interfere with building main() { return 0; }, which autoconf
  1886. # likes to use as its default program.
  1887. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1888. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1889. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1890. fi
  1891. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1892. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1893. fi
  1894. if test "x$enable_fatal_warnings" = "xyes"; then
  1895. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1896. # default autoconf programs are full of errors.
  1897. CFLAGS="$CFLAGS -Werror"
  1898. fi
  1899. fi
  1900. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1901. case "$host_os" in
  1902. darwin*)
  1903. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1904. esac
  1905. fi
  1906. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1907. AC_CONFIG_FILES([
  1908. Doxyfile
  1909. Makefile
  1910. contrib/dist/suse/tor.sh
  1911. contrib/operator-tools/tor.logrotate
  1912. contrib/dist/tor.sh
  1913. contrib/dist/torctl
  1914. contrib/dist/tor.service
  1915. src/config/torrc.sample
  1916. src/config/torrc.minimal
  1917. src/rust/.cargo/config
  1918. scripts/maint/checkOptionDocs.pl
  1919. scripts/maint/updateVersions.pl
  1920. ])
  1921. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1922. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1923. for file in $regular_mans ; do
  1924. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1925. echo "==================================";
  1926. echo;
  1927. echo "Building Tor has failed since manpages cannot be built.";
  1928. echo;
  1929. echo "You need asciidoc installed to be able to build the manpages.";
  1930. echo "To build without manpages, use the --disable-asciidoc argument";
  1931. echo "when calling configure.";
  1932. echo;
  1933. echo "==================================";
  1934. exit 1;
  1935. fi
  1936. done
  1937. fi
  1938. if test "$fragile_hardening" = "yes"; then
  1939. AC_MSG_WARN([
  1940. ============
  1941. Warning! Building Tor with --enable-fragile-hardening (also known as
  1942. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  1943. other kinds of attacks easier. A Tor instance build with this option will be
  1944. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  1945. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  1946. denial of service attacks. For more information, see
  1947. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  1948. ============
  1949. ])
  1950. fi
  1951. AC_OUTPUT