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$bwin32" = "xtrue")
  322. dnl Enable C99 when compiling with MIPSpro
  323. AC_MSG_CHECKING([for MIPSpro compiler])
  324. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  325. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  326. #error
  327. return x(y);
  328. #endif
  329. ])],
  330. bmipspro=false; AC_MSG_RESULT(no),
  331. bmipspro=true; AC_MSG_RESULT(yes))
  332. if test "$bmipspro" = "true"; then
  333. CFLAGS="$CFLAGS -c99"
  334. fi
  335. AC_C_BIGENDIAN
  336. if test "x$enable_rust" = "xyes"; then
  337. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  338. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  339. if test "x$RUSTC" = "xno"; then
  340. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  341. fi
  342. AC_ARG_VAR([CARGO], [path to the cargo binary])
  343. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  344. if test "x$CARGO" = "xno"; then
  345. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  346. fi
  347. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  348. if test "x$enable_cargo_online_mode" = "xyes"; then
  349. CARGO_ONLINE=
  350. RUST_DL=#
  351. else
  352. CARGO_ONLINE=--frozen
  353. RUST_DL=
  354. dnl When we're not allowed to touch the network, we need crate dependencies
  355. dnl locally available.
  356. AC_MSG_CHECKING([rust crate dependencies])
  357. AC_ARG_VAR([RUST_DEPENDENCIES], [path to directory with local crate mirror])
  358. if test "x$RUST_DEPENDENCIES" = "x"; then
  359. RUST_DEPENDENCIES="$srcdir/src/ext/rust/"
  360. NEED_MOD=1
  361. fi
  362. if test ! -d "$RUST_DEPENDENCIES"; then
  363. 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.])
  364. fi
  365. for dep in $rust_crates; do
  366. if test ! -d "$RUST_DEPENDENCIES"/"$dep"; then
  367. 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.])
  368. fi
  369. done
  370. if test "x$NEED_MOD" = "x1"; then
  371. dnl When looking for dependencies from cargo, pick right directory
  372. RUST_DEPENDENCIES="../../src/ext/rust"
  373. fi
  374. fi
  375. dnl For now both MSVC and MinGW rust libraries will output static libs with
  376. dnl the MSVC naming convention.
  377. if test "$bwin32" = "true"; then
  378. TOR_RUST_STATIC_NAME=tor_rust.lib
  379. else
  380. TOR_RUST_STATIC_NAME=libtor_rust.a
  381. fi
  382. AC_SUBST(TOR_RUST_STATIC_NAME)
  383. AC_SUBST(CARGO_ONLINE)
  384. AC_SUBST(RUST_DL)
  385. dnl Let's check the rustc version, too
  386. AC_MSG_CHECKING([rust version])
  387. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  388. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  389. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  390. AC_MSG_ERROR([rustc version couldn't be identified])
  391. fi
  392. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  393. AC_MSG_ERROR([rustc must be at least version 1.14])
  394. fi
  395. fi
  396. AC_SEARCH_LIBS(socket, [socket network])
  397. AC_SEARCH_LIBS(gethostbyname, [nsl])
  398. AC_SEARCH_LIBS(dlopen, [dl])
  399. AC_SEARCH_LIBS(inet_aton, [resolv])
  400. AC_SEARCH_LIBS(backtrace, [execinfo])
  401. saved_LIBS="$LIBS"
  402. AC_SEARCH_LIBS([clock_gettime], [rt])
  403. if test "$LIBS" != "$saved_LIBS"; then
  404. # Looks like we need -lrt for clock_gettime().
  405. have_rt=yes
  406. fi
  407. AC_SEARCH_LIBS(pthread_create, [pthread])
  408. AC_SEARCH_LIBS(pthread_detach, [pthread])
  409. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  410. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  411. AC_CHECK_FUNCS(
  412. _NSGetEnviron \
  413. RtlSecureZeroMemory \
  414. SecureZeroMemory \
  415. accept4 \
  416. backtrace \
  417. backtrace_symbols_fd \
  418. eventfd \
  419. explicit_bzero \
  420. timingsafe_memcmp \
  421. flock \
  422. ftime \
  423. get_current_dir_name \
  424. getaddrinfo \
  425. getifaddrs \
  426. getpass \
  427. getrlimit \
  428. gettimeofday \
  429. gmtime_r \
  430. htonll \
  431. inet_aton \
  432. ioctl \
  433. issetugid \
  434. llround \
  435. localtime_r \
  436. lround \
  437. memmem \
  438. memset_s \
  439. pipe \
  440. pipe2 \
  441. prctl \
  442. readpassphrase \
  443. rint \
  444. sigaction \
  445. socketpair \
  446. statvfs \
  447. strlcat \
  448. strlcpy \
  449. strnlen \
  450. strptime \
  451. strtok_r \
  452. strtoull \
  453. sysconf \
  454. sysctl \
  455. truncate \
  456. uname \
  457. usleep \
  458. vasprintf \
  459. _vscprintf
  460. )
  461. # Apple messed up when they added two functions functions in Sierra: they
  462. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  463. # checks. So we should only probe for those functions if we are sure that we
  464. # are not targetting OSX 10.11 or earlier.
  465. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  466. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  467. #ifdef __APPLE__
  468. # include <AvailabilityMacros.h>
  469. # ifndef MAC_OS_X_VERSION_10_12
  470. # define MAC_OS_X_VERSION_10_12 101200
  471. # endif
  472. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  473. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  474. # error "Running on Mac OSX 10.11 or earlier"
  475. # endif
  476. # endif
  477. #endif
  478. ]], [[]])],
  479. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  480. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  481. if test "$on_macos_pre_10_12" = "no"; then
  482. AC_CHECK_FUNCS(
  483. clock_gettime \
  484. getentropy \
  485. )
  486. fi
  487. if test "$bwin32" != "true"; then
  488. AC_CHECK_HEADERS(pthread.h)
  489. AC_CHECK_FUNCS(pthread_create)
  490. AC_CHECK_FUNCS(pthread_condattr_setclock)
  491. fi
  492. if test "$bwin32" = "true"; then
  493. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  494. #include <windows.h>
  495. #include <conio.h>
  496. #include <wchar.h>
  497. ])
  498. fi
  499. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  500. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  501. dnl ------------------------------------------------------
  502. dnl Where do you live, libevent? And how do we call you?
  503. if test "$bwin32" = "true"; then
  504. TOR_LIB_WS32=-lws2_32
  505. TOR_LIB_IPHLPAPI=-liphlpapi
  506. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  507. # think it's actually necessary.
  508. TOR_LIB_GDI=-lgdi32
  509. TOR_LIB_USERENV=-luserenv
  510. else
  511. TOR_LIB_WS32=
  512. TOR_LIB_GDI=
  513. TOR_LIB_USERENV=
  514. fi
  515. AC_SUBST(TOR_LIB_WS32)
  516. AC_SUBST(TOR_LIB_GDI)
  517. AC_SUBST(TOR_LIB_IPHLPAPI)
  518. AC_SUBST(TOR_LIB_USERENV)
  519. tor_libevent_pkg_redhat="libevent"
  520. tor_libevent_pkg_debian="libevent-dev"
  521. tor_libevent_devpkg_redhat="libevent-devel"
  522. tor_libevent_devpkg_debian="libevent-dev"
  523. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  524. dnl linking for static builds.
  525. STATIC_LIBEVENT_FLAGS=""
  526. if test "$enable_static_libevent" = "yes"; then
  527. if test "$have_rt" = "yes"; then
  528. STATIC_LIBEVENT_FLAGS=" -lrt "
  529. fi
  530. fi
  531. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  532. #ifdef _WIN32
  533. #include <winsock2.h>
  534. #endif
  535. #include <sys/time.h>
  536. #include <sys/types.h>
  537. #include <event2/event.h>], [
  538. #ifdef _WIN32
  539. #include <winsock2.h>
  540. #endif
  541. struct event_base;
  542. struct event_base *event_base_new(void);],
  543. [
  544. #ifdef _WIN32
  545. {WSADATA d; WSAStartup(0x101,&d); }
  546. #endif
  547. event_base_new();
  548. ], [--with-libevent-dir], [/opt/libevent])
  549. dnl Determine the incantation needed to link libevent.
  550. save_LIBS="$LIBS"
  551. save_LDFLAGS="$LDFLAGS"
  552. save_CPPFLAGS="$CPPFLAGS"
  553. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  554. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  555. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  556. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  557. if test "$enable_static_libevent" = "yes"; then
  558. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  559. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  560. else
  561. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  562. fi
  563. else
  564. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  565. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  566. 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"))
  567. if test "$ac_cv_search_event_new" != "none required"; then
  568. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  569. fi
  570. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  571. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  572. fi
  573. else
  574. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  575. fi
  576. fi
  577. dnl Now check for particular libevent functions.
  578. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  579. evutil_secure_rng_add_bytes \
  580. ])
  581. LIBS="$save_LIBS"
  582. LDFLAGS="$save_LDFLAGS"
  583. CPPFLAGS="$save_CPPFLAGS"
  584. dnl Check that libevent is at least at version 2.0.10, the first stable
  585. dnl release of its series
  586. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  587. AC_MSG_CHECKING([whether Libevent is new enough])
  588. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  589. #include <event2/event.h>
  590. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  591. #error
  592. int x = y(zz);
  593. #else
  594. int x = 1;
  595. #endif
  596. ])], [ AC_MSG_RESULT([yes]) ],
  597. [ AC_MSG_RESULT([no])
  598. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  599. LIBS="$save_LIBS"
  600. LDFLAGS="$save_LDFLAGS"
  601. CPPFLAGS="$save_CPPFLAGS"
  602. AC_SUBST(TOR_LIBEVENT_LIBS)
  603. dnl ------------------------------------------------------
  604. dnl Where do you live, libm?
  605. dnl On some platforms (Haiku/BeOS) the math library is
  606. dnl part of libroot. In which case don't link against lm
  607. TOR_LIB_MATH=""
  608. save_LIBS="$LIBS"
  609. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  610. if test "$ac_cv_search_pow" != "none required"; then
  611. TOR_LIB_MATH="$ac_cv_search_pow"
  612. fi
  613. LIBS="$save_LIBS"
  614. AC_SUBST(TOR_LIB_MATH)
  615. dnl ------------------------------------------------------
  616. dnl Where do you live, openssl? And how do we call you?
  617. tor_openssl_pkg_redhat="openssl"
  618. tor_openssl_pkg_debian="libssl-dev"
  619. tor_openssl_devpkg_redhat="openssl-devel"
  620. tor_openssl_devpkg_debian="libssl-dev"
  621. ALT_openssl_WITHVAL=""
  622. AC_ARG_WITH(ssl-dir,
  623. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  624. [
  625. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  626. ALT_openssl_WITHVAL="$withval"
  627. fi
  628. ])
  629. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  630. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
  631. [#include <openssl/ssl.h>],
  632. [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
  633. [TLSv1_1_method();], [],
  634. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  635. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  636. if test "$enable_static_openssl" = "yes"; then
  637. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  638. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  639. else
  640. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  641. fi
  642. else
  643. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  644. fi
  645. AC_SUBST(TOR_OPENSSL_LIBS)
  646. dnl Now check for particular openssl functions.
  647. save_LIBS="$LIBS"
  648. save_LDFLAGS="$LDFLAGS"
  649. save_CPPFLAGS="$CPPFLAGS"
  650. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  651. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  652. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  653. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  654. #include <openssl/opensslv.h>
  655. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  656. #error "too old"
  657. #endif
  658. ]], [[]])],
  659. [ : ],
  660. [ 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.]) ])
  661. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  662. #include <openssl/opensslv.h>
  663. #include <openssl/evp.h>
  664. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  665. #error "no ECC"
  666. #endif
  667. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  668. #error "curves unavailable"
  669. #endif
  670. ]], [[]])],
  671. [ : ],
  672. [ 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.]) ])
  673. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  674. [#include <openssl/ssl.h>
  675. ])
  676. AC_CHECK_FUNCS([ \
  677. SSL_SESSION_get_master_key \
  678. SSL_get_server_random \
  679. SSL_get_client_ciphers \
  680. SSL_get_client_random \
  681. SSL_CIPHER_find \
  682. TLS_method
  683. ])
  684. dnl Check if OpenSSL has scrypt implementation.
  685. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  686. dnl Check if OpenSSL structures are opaque
  687. AC_CHECK_MEMBERS([SSL.state], , ,
  688. [#include <openssl/ssl.h>
  689. ])
  690. dnl Define the set of checks for KIST scheduler support.
  691. AC_DEFUN([CHECK_KIST_SUPPORT],[
  692. dnl KIST needs struct tcp_info and for certain members to exist.
  693. AC_CHECK_MEMBERS(
  694. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  695. , ,[[#include <netinet/tcp.h>]])
  696. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  697. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  698. #include <linux/sockios.h>
  699. #ifndef SIOCOUTQNSD
  700. #error
  701. #endif
  702. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  703. if test "x$have_siocoutqnsd" = "xyes"; then
  704. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  705. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  706. have_kist_support=yes
  707. fi
  708. fi
  709. fi
  710. ])
  711. dnl Now, trigger the check.
  712. CHECK_KIST_SUPPORT
  713. AS_IF([test "x$have_kist_support" = "xyes"],
  714. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  715. on this system])],
  716. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  717. LIBS="$save_LIBS"
  718. LDFLAGS="$save_LDFLAGS"
  719. CPPFLAGS="$save_CPPFLAGS"
  720. dnl ------------------------------------------------------
  721. dnl Where do you live, zlib? And how do we call you?
  722. tor_zlib_pkg_redhat="zlib"
  723. tor_zlib_pkg_debian="zlib1g"
  724. tor_zlib_devpkg_redhat="zlib-devel"
  725. tor_zlib_devpkg_debian="zlib1g-dev"
  726. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  727. [#include <zlib.h>],
  728. [const char * zlibVersion(void);],
  729. [zlibVersion();], [--with-zlib-dir],
  730. [/opt/zlib])
  731. if test "$enable_static_zlib" = "yes"; then
  732. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  733. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  734. using --enable-static-zlib")
  735. else
  736. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  737. fi
  738. else
  739. TOR_ZLIB_LIBS="-lz"
  740. fi
  741. AC_SUBST(TOR_ZLIB_LIBS)
  742. dnl ------------------------------------------------------
  743. dnl Where we do we find lzma?
  744. AC_ARG_ENABLE(lzma,
  745. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  746. [case "${enableval}" in
  747. "yes") lzma=true ;;
  748. "no") lzma=false ;;
  749. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  750. esac], [lzma=auto])
  751. if test "x$enable_lzma" = "xno"; then
  752. have_lzma=no;
  753. else
  754. PKG_CHECK_MODULES([LZMA],
  755. [liblzma],
  756. have_lzma=yes,
  757. have_lzma=no)
  758. if test "x$have_lzma" = "xno" ; then
  759. AC_MSG_WARN([Unable to find liblzma.])
  760. fi
  761. fi
  762. if test "x$have_lzma" = "xyes"; then
  763. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  764. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  765. TOR_LZMA_LIBS="${LZMA_LIBS}"
  766. fi
  767. AC_SUBST(TOR_LZMA_CFLAGS)
  768. AC_SUBST(TOR_LZMA_LIBS)
  769. dnl ------------------------------------------------------
  770. dnl Where we do we find zstd?
  771. AC_ARG_ENABLE(zstd,
  772. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  773. [case "${enableval}" in
  774. "yes") zstd=true ;;
  775. "no") zstd=false ;;
  776. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  777. esac], [zstd=auto])
  778. if test "x$enable_zstd" = "xno"; then
  779. have_zstd=no;
  780. else
  781. PKG_CHECK_MODULES([ZSTD],
  782. [libzstd >= 1.1],
  783. have_zstd=yes,
  784. have_zstd=no)
  785. if test "x$have_zstd" = "xno" ; then
  786. AC_MSG_WARN([Unable to find libzstd.])
  787. fi
  788. fi
  789. if test "x$have_zstd" = "xyes"; then
  790. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  791. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  792. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  793. fi
  794. AC_SUBST(TOR_ZSTD_CFLAGS)
  795. AC_SUBST(TOR_ZSTD_LIBS)
  796. dnl ----------------------------------------------------------------------
  797. dnl Check if libcap is available for capabilities.
  798. tor_cap_pkg_debian="libcap2"
  799. tor_cap_pkg_redhat="libcap"
  800. tor_cap_devpkg_debian="libcap-dev"
  801. tor_cap_devpkg_redhat="libcap-devel"
  802. AC_CHECK_LIB([cap], [cap_init], [],
  803. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  804. )
  805. AC_CHECK_FUNCS(cap_set_proc)
  806. dnl ---------------------------------------------------------------------
  807. dnl Now that we know about our major libraries, we can check for compiler
  808. dnl and linker hardening options. We need to do this with the libraries known,
  809. dnl since sometimes the linker will like an option but not be willing to
  810. dnl use it with a build of a library.
  811. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  812. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  813. CFLAGS_FTRAPV=
  814. CFLAGS_FWRAPV=
  815. CFLAGS_ASAN=
  816. CFLAGS_UBSAN=
  817. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  818. #if !defined(__clang__)
  819. #error
  820. #endif])], have_clang=yes, have_clang=no)
  821. if test "x$enable_gcc_hardening" != "xno"; then
  822. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  823. if test "x$have_clang" = "xyes"; then
  824. TOR_CHECK_CFLAGS(-Qunused-arguments)
  825. fi
  826. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  827. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  828. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  829. m4_ifdef([AS_VAR_IF],[
  830. AS_VAR_IF(can_compile, [yes],
  831. AS_VAR_IF(can_link, [yes],
  832. [],
  833. 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.)]))
  834. )])
  835. AS_VAR_POPDEF([can_link])
  836. AS_VAR_POPDEF([can_compile])
  837. TOR_CHECK_CFLAGS(-Wstack-protector)
  838. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  839. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  840. TOR_CHECK_CFLAGS(-fPIE)
  841. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  842. fi
  843. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  844. fi
  845. if test "$fragile_hardening" = "yes"; then
  846. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  847. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  848. 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.])
  849. fi
  850. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  851. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  852. fi
  853. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  854. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  855. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  856. fi
  857. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  858. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  859. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  860. fi
  861. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  862. fi
  863. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  864. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  865. mulodi_fixes_ftrapv=no
  866. if test "$have_clang" = "yes"; then
  867. saved_CFLAGS="$CFLAGS"
  868. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  869. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  870. AC_LINK_IFELSE([
  871. AC_LANG_SOURCE([[
  872. #include <stdint.h>
  873. #include <stdlib.h>
  874. int main(int argc, char **argv)
  875. {
  876. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  877. * (int64_t)atoi(argv[3]);
  878. return x == 9;
  879. } ]])],
  880. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  881. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  882. if test "$ftrapv_can_link" = "no"; then
  883. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  884. AC_LINK_IFELSE([
  885. AC_LANG_SOURCE([[
  886. #include <stdint.h>
  887. #include <stdlib.h>
  888. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  889. *overflow=0;
  890. return a;
  891. }
  892. int main(int argc, char **argv)
  893. {
  894. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  895. * (int64_t)atoi(argv[3]);
  896. return x == 9;
  897. } ]])],
  898. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  899. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  900. fi
  901. CFLAGS="$saved_CFLAGS"
  902. fi
  903. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  904. dnl These cflags add bunches of branches, and we haven't been able to
  905. dnl persuade ourselves that they're suitable for code that needs to be
  906. dnl constant time.
  907. AC_SUBST(CFLAGS_BUGTRAP)
  908. dnl These cflags are variant ones sutable for code that needs to be
  909. dnl constant-time.
  910. AC_SUBST(CFLAGS_CONSTTIME)
  911. if test "x$enable_linker_hardening" != "xno"; then
  912. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  913. fi
  914. # For backtrace support
  915. TOR_CHECK_LDFLAGS(-rdynamic)
  916. dnl ------------------------------------------------------
  917. dnl Now see if we have a -fomit-frame-pointer compiler option.
  918. saved_CFLAGS="$CFLAGS"
  919. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  920. F_OMIT_FRAME_POINTER=''
  921. if test "$saved_CFLAGS" != "$CFLAGS"; then
  922. if test "$fragile_hardening" = "yes"; then
  923. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  924. fi
  925. fi
  926. CFLAGS="$saved_CFLAGS"
  927. AC_SUBST(F_OMIT_FRAME_POINTER)
  928. dnl ------------------------------------------------------
  929. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  930. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  931. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  932. dnl code will work.
  933. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  934. dnl ============================================================
  935. dnl Check for libseccomp
  936. if test "x$enable_seccomp" != "xno"; then
  937. AC_CHECK_HEADERS([seccomp.h])
  938. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  939. fi
  940. dnl ============================================================
  941. dnl Check for libscrypt
  942. if test "x$enable_libscrypt" != "xno"; then
  943. AC_CHECK_HEADERS([libscrypt.h])
  944. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  945. AC_CHECK_FUNCS([libscrypt_scrypt])
  946. fi
  947. dnl ============================================================
  948. dnl We need an implementation of curve25519.
  949. dnl set these defaults.
  950. build_curve25519_donna=no
  951. build_curve25519_donna_c64=no
  952. use_curve25519_donna=no
  953. use_curve25519_nacl=no
  954. CURVE25519_LIBS=
  955. dnl The best choice is using curve25519-donna-c64, but that requires
  956. dnl that we
  957. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  958. tor_cv_can_use_curve25519_donna_c64,
  959. [AC_RUN_IFELSE(
  960. [AC_LANG_PROGRAM([dnl
  961. #include <stdint.h>
  962. typedef unsigned uint128_t __attribute__((mode(TI)));
  963. int func(uint64_t a, uint64_t b) {
  964. uint128_t c = ((uint128_t)a) * b;
  965. int ok = ((uint64_t)(c>>96)) == 522859 &&
  966. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  967. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  968. (((uint64_t)(c))&0xffffffffL) == 0;
  969. return ok;
  970. }
  971. ], [dnl
  972. int ok = func( ((uint64_t)2000000000) * 1000000000,
  973. ((uint64_t)1234567890) << 24);
  974. return !ok;
  975. ])],
  976. [tor_cv_can_use_curve25519_donna_c64=yes],
  977. [tor_cv_can_use_curve25519_donna_c64=no],
  978. [AC_LINK_IFELSE(
  979. [AC_LANG_PROGRAM([dnl
  980. #include <stdint.h>
  981. typedef unsigned uint128_t __attribute__((mode(TI)));
  982. int func(uint64_t a, uint64_t b) {
  983. uint128_t c = ((uint128_t)a) * b;
  984. int ok = ((uint64_t)(c>>96)) == 522859 &&
  985. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  986. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  987. (((uint64_t)(c))&0xffffffffL) == 0;
  988. return ok;
  989. }
  990. ], [dnl
  991. int ok = func( ((uint64_t)2000000000) * 1000000000,
  992. ((uint64_t)1234567890) << 24);
  993. return !ok;
  994. ])],
  995. [tor_cv_can_use_curve25519_donna_c64=cross],
  996. [tor_cv_can_use_curve25519_donna_c64=no])])])
  997. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  998. nacl/crypto_scalarmult_curve25519.h])
  999. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1000. tor_cv_can_use_curve25519_nacl,
  1001. [tor_saved_LIBS="$LIBS"
  1002. LIBS="$LIBS -lnacl"
  1003. AC_LINK_IFELSE(
  1004. [AC_LANG_PROGRAM([dnl
  1005. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1006. #include <crypto_scalarmult_curve25519.h>
  1007. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1008. #include <nacl/crypto_scalarmult_curve25519.h>
  1009. #endif
  1010. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1011. #error Hey, this is the reference implementation! That's not fast.
  1012. #endif
  1013. ], [
  1014. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1015. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1016. [tor_cv_can_use_curve25519_nacl=no])
  1017. LIBS="$tor_saved_LIBS" ])
  1018. dnl Okay, now we need to figure out which one to actually use. Fall back
  1019. dnl to curve25519-donna.c
  1020. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1021. build_curve25519_donna_c64=yes
  1022. use_curve25519_donna=yes
  1023. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1024. use_curve25519_nacl=yes
  1025. CURVE25519_LIBS=-lnacl
  1026. else
  1027. build_curve25519_donna=yes
  1028. use_curve25519_donna=yes
  1029. fi
  1030. if test "x$use_curve25519_donna" = "xyes"; then
  1031. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1032. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1033. fi
  1034. if test "x$use_curve25519_nacl" = "xyes"; then
  1035. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1036. [Defined if we should use a curve25519 from nacl])
  1037. fi
  1038. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1039. test "x$build_curve25519_donna" = "xyes")
  1040. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1041. test "x$build_curve25519_donna_c64" = "xyes")
  1042. AC_SUBST(CURVE25519_LIBS)
  1043. dnl Make sure to enable support for large off_t if available.
  1044. AC_SYS_LARGEFILE
  1045. AC_CHECK_HEADERS([assert.h \
  1046. errno.h \
  1047. fcntl.h \
  1048. signal.h \
  1049. string.h \
  1050. sys/capability.h \
  1051. sys/fcntl.h \
  1052. sys/stat.h \
  1053. sys/time.h \
  1054. sys/types.h \
  1055. time.h \
  1056. unistd.h \
  1057. arpa/inet.h \
  1058. crt_externs.h \
  1059. execinfo.h \
  1060. grp.h \
  1061. ifaddrs.h \
  1062. inttypes.h \
  1063. limits.h \
  1064. linux/types.h \
  1065. machine/limits.h \
  1066. malloc.h \
  1067. malloc/malloc.h \
  1068. malloc_np.h \
  1069. netdb.h \
  1070. netinet/in.h \
  1071. netinet/in6.h \
  1072. pwd.h \
  1073. readpassphrase.h \
  1074. stdint.h \
  1075. sys/eventfd.h \
  1076. sys/file.h \
  1077. sys/ioctl.h \
  1078. sys/limits.h \
  1079. sys/mman.h \
  1080. sys/param.h \
  1081. sys/prctl.h \
  1082. sys/random.h \
  1083. sys/resource.h \
  1084. sys/select.h \
  1085. sys/socket.h \
  1086. sys/statvfs.h \
  1087. sys/syscall.h \
  1088. sys/sysctl.h \
  1089. sys/syslimits.h \
  1090. sys/time.h \
  1091. sys/types.h \
  1092. sys/un.h \
  1093. sys/utime.h \
  1094. sys/wait.h \
  1095. syslog.h \
  1096. utime.h])
  1097. AC_CHECK_HEADERS(sys/param.h)
  1098. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1099. [#ifdef HAVE_SYS_TYPES_H
  1100. #include <sys/types.h>
  1101. #endif
  1102. #ifdef HAVE_SYS_SOCKET_H
  1103. #include <sys/socket.h>
  1104. #endif])
  1105. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=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_NET_IF_H
  1113. #include <net/if.h>
  1114. #endif
  1115. #ifdef HAVE_NETINET_IN_H
  1116. #include <netinet/in.h>
  1117. #endif])
  1118. AC_CHECK_HEADERS(linux/if.h,[],[],
  1119. [
  1120. #ifdef HAVE_SYS_SOCKET_H
  1121. #include <sys/socket.h>
  1122. #endif
  1123. ])
  1124. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1125. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1126. [#ifdef HAVE_SYS_TYPES_H
  1127. #include <sys/types.h>
  1128. #endif
  1129. #ifdef HAVE_SYS_SOCKET_H
  1130. #include <sys/socket.h>
  1131. #endif
  1132. #ifdef HAVE_LIMITS_H
  1133. #include <limits.h>
  1134. #endif
  1135. #ifdef HAVE_LINUX_TYPES_H
  1136. #include <linux/types.h>
  1137. #endif
  1138. #ifdef HAVE_NETINET_IN6_H
  1139. #include <netinet/in6.h>
  1140. #endif
  1141. #ifdef HAVE_NETINET_IN_H
  1142. #include <netinet/in.h>
  1143. #endif])
  1144. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1145. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1146. [#ifdef HAVE_SYS_TYPES_H
  1147. #include <sys/types.h>
  1148. #endif
  1149. #ifdef HAVE_SYS_SOCKET_H
  1150. #include <sys/socket.h>
  1151. #endif
  1152. #ifdef HAVE_LIMITS_H
  1153. #include <limits.h>
  1154. #endif
  1155. #ifdef HAVE_LINUX_TYPES_H
  1156. #include <linux/types.h>
  1157. #endif
  1158. #ifdef HAVE_NETINET_IN6_H
  1159. #include <netinet/in6.h>
  1160. #endif
  1161. #ifdef HAVE_NETINET_IN_H
  1162. #include <netinet/in.h>
  1163. #endif
  1164. #ifdef HAVE_LINUX_IF_H
  1165. #include <linux/if.h>
  1166. #endif])
  1167. transparent_ok=0
  1168. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1169. transparent_ok=1
  1170. fi
  1171. if test "x$linux_netfilter_ipv4" = "x1"; then
  1172. transparent_ok=1
  1173. fi
  1174. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1175. transparent_ok=1
  1176. fi
  1177. if test "x$transparent_ok" = "x1"; then
  1178. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1179. else
  1180. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1181. fi
  1182. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1183. [#ifdef HAVE_SYS_TYPES_H
  1184. #include <sys/types.h>
  1185. #endif
  1186. #ifdef HAVE_SYS_TIME_H
  1187. #include <sys/time.h>
  1188. #endif])
  1189. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1190. dnl Watch out.
  1191. AC_CHECK_SIZEOF(int8_t)
  1192. AC_CHECK_SIZEOF(int16_t)
  1193. AC_CHECK_SIZEOF(int32_t)
  1194. AC_CHECK_SIZEOF(int64_t)
  1195. AC_CHECK_SIZEOF(uint8_t)
  1196. AC_CHECK_SIZEOF(uint16_t)
  1197. AC_CHECK_SIZEOF(uint32_t)
  1198. AC_CHECK_SIZEOF(uint64_t)
  1199. AC_CHECK_SIZEOF(intptr_t)
  1200. AC_CHECK_SIZEOF(uintptr_t)
  1201. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1202. AC_CHECK_SIZEOF(char)
  1203. AC_CHECK_SIZEOF(short)
  1204. AC_CHECK_SIZEOF(int)
  1205. AC_CHECK_SIZEOF(long)
  1206. AC_CHECK_SIZEOF(long long)
  1207. AC_CHECK_SIZEOF(__int64)
  1208. AC_CHECK_SIZEOF(void *)
  1209. AC_CHECK_SIZEOF(time_t)
  1210. AC_CHECK_SIZEOF(size_t)
  1211. AC_CHECK_SIZEOF(pid_t)
  1212. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1213. AC_PC_FROM_UCONTEXT([:])
  1214. dnl used to include sockaddr_storage, but everybody has that.
  1215. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1216. [#ifdef HAVE_SYS_TYPES_H
  1217. #include <sys/types.h>
  1218. #endif
  1219. #ifdef HAVE_NETINET_IN_H
  1220. #include <netinet/in.h>
  1221. #endif
  1222. #ifdef HAVE_NETINET_IN6_H
  1223. #include <netinet/in6.h>
  1224. #endif
  1225. #ifdef HAVE_SYS_SOCKET_H
  1226. #include <sys/socket.h>
  1227. #endif
  1228. #ifdef _WIN32
  1229. #define _WIN32_WINNT 0x0501
  1230. #define WIN32_LEAN_AND_MEAN
  1231. #include <winsock2.h>
  1232. #include <ws2tcpip.h>
  1233. #endif
  1234. ])
  1235. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1236. [#ifdef HAVE_SYS_TYPES_H
  1237. #include <sys/types.h>
  1238. #endif
  1239. #ifdef HAVE_NETINET_IN_H
  1240. #include <netinet/in.h>
  1241. #endif
  1242. #ifdef HAVE_NETINET_IN6_H
  1243. #include <netinet/in6.h>
  1244. #endif
  1245. #ifdef HAVE_SYS_SOCKET_H
  1246. #include <sys/socket.h>
  1247. #endif
  1248. #ifdef _WIN32
  1249. #define _WIN32_WINNT 0x0501
  1250. #define WIN32_LEAN_AND_MEAN
  1251. #include <winsock2.h>
  1252. #include <ws2tcpip.h>
  1253. #endif
  1254. ])
  1255. AC_CHECK_TYPES([rlim_t], , ,
  1256. [#ifdef HAVE_SYS_TYPES_H
  1257. #include <sys/types.h>
  1258. #endif
  1259. #ifdef HAVE_SYS_TIME_H
  1260. #include <sys/time.h>
  1261. #endif
  1262. #ifdef HAVE_SYS_RESOURCE_H
  1263. #include <sys/resource.h>
  1264. #endif
  1265. ])
  1266. AX_CHECK_SIGN([time_t],
  1267. [ : ],
  1268. [ : ], [
  1269. #ifdef HAVE_SYS_TYPES_H
  1270. #include <sys/types.h>
  1271. #endif
  1272. #ifdef HAVE_SYS_TIME_H
  1273. #include <sys/time.h>
  1274. #endif
  1275. #ifdef HAVE_TIME_H
  1276. #include <time.h>
  1277. #endif
  1278. ])
  1279. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1280. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1281. fi
  1282. AX_CHECK_SIGN([size_t],
  1283. [ tor_cv_size_t_signed=yes ],
  1284. [ tor_cv_size_t_signed=no ], [
  1285. #ifdef HAVE_SYS_TYPES_H
  1286. #include <sys/types.h>
  1287. #endif
  1288. ])
  1289. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1290. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1291. fi
  1292. AX_CHECK_SIGN([enum always],
  1293. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1294. [ : ], [
  1295. enum always { AAA, BBB, CCC };
  1296. ])
  1297. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1298. #ifdef HAVE_SYS_SOCKET_H
  1299. #include <sys/socket.h>
  1300. #endif
  1301. ])
  1302. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1303. AC_CHECK_SIZEOF(cell_t)
  1304. # Now make sure that NULL can be represented as zero bytes.
  1305. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1306. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1307. [[#include <stdlib.h>
  1308. #include <string.h>
  1309. #include <stdio.h>
  1310. #ifdef HAVE_STDDEF_H
  1311. #include <stddef.h>
  1312. #endif
  1313. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1314. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1315. [tor_cv_null_is_zero=yes],
  1316. [tor_cv_null_is_zero=no],
  1317. [tor_cv_null_is_zero=cross])])
  1318. if test "$tor_cv_null_is_zero" = "cross"; then
  1319. # Cross-compiling; let's hope that the target isn't raving mad.
  1320. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1321. fi
  1322. if test "$tor_cv_null_is_zero" != "no"; then
  1323. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1324. [Define to 1 iff memset(0) sets pointers to NULL])
  1325. fi
  1326. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1327. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1328. [[#include <stdlib.h>
  1329. #include <string.h>
  1330. #include <stdio.h>
  1331. #ifdef HAVE_STDDEF_H
  1332. #include <stddef.h>
  1333. #endif
  1334. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1335. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1336. [tor_cv_dbl0_is_zero=yes],
  1337. [tor_cv_dbl0_is_zero=no],
  1338. [tor_cv_dbl0_is_zero=cross])])
  1339. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1340. # Cross-compiling; let's hope that the target isn't raving mad.
  1341. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1342. fi
  1343. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1344. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1345. [Define to 1 iff memset(0) sets doubles to 0.0])
  1346. fi
  1347. # And what happens when we malloc zero?
  1348. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1349. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1350. [[#include <stdlib.h>
  1351. #include <string.h>
  1352. #include <stdio.h>
  1353. #ifdef HAVE_STDDEF_H
  1354. #include <stddef.h>
  1355. #endif
  1356. int main () { return malloc(0)?0:1; }]])],
  1357. [tor_cv_malloc_zero_works=yes],
  1358. [tor_cv_malloc_zero_works=no],
  1359. [tor_cv_malloc_zero_works=cross])])
  1360. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1361. # Cross-compiling; let's hope that the target isn't raving mad.
  1362. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1363. fi
  1364. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1365. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1366. [Define to 1 iff malloc(0) returns a pointer])
  1367. fi
  1368. # whether we seem to be in a 2s-complement world.
  1369. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1370. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1371. [[int main () { int problem = ((-99) != (~99)+1);
  1372. return problem ? 1 : 0; }]])],
  1373. [tor_cv_twos_complement=yes],
  1374. [tor_cv_twos_complement=no],
  1375. [tor_cv_twos_complement=cross])])
  1376. if test "$tor_cv_twos_complement" = "cross"; then
  1377. # Cross-compiling; let's hope that the target isn't raving mad.
  1378. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1379. fi
  1380. if test "$tor_cv_twos_complement" != "no"; then
  1381. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1382. [Define to 1 iff we represent negative integers with
  1383. two's complement])
  1384. fi
  1385. # What does shifting a negative value do?
  1386. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1387. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1388. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1389. [tor_cv_sign_extend=yes],
  1390. [tor_cv_sign_extend=no],
  1391. [tor_cv_sign_extend=cross])])
  1392. if test "$tor_cv_sign_extend" = "cross"; then
  1393. # Cross-compiling; let's hope that the target isn't raving mad.
  1394. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1395. fi
  1396. if test "$tor_cv_sign_extend" != "no"; then
  1397. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1398. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1399. fi
  1400. # Is uint8_t the same type as unsigned char?
  1401. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1402. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1403. #include <stdint.h>
  1404. extern uint8_t c;
  1405. unsigned char c;]])],
  1406. [tor_cv_uint8_uchar=yes],
  1407. [tor_cv_uint8_uchar=no],
  1408. [tor_cv_uint8_uchar=cross])])
  1409. if test "$tor_cv_uint8_uchar" = "cross"; then
  1410. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1411. fi
  1412. if test "$tor_cv_uint8_uchar" = "no"; then
  1413. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1414. fi
  1415. # Whether we should use the dmalloc memory allocation debugging library.
  1416. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1417. AC_ARG_WITH(dmalloc,
  1418. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1419. [if [[ "$withval" = "yes" ]]; then
  1420. dmalloc=1
  1421. AC_MSG_RESULT(yes)
  1422. else
  1423. dmalloc=1
  1424. AC_MSG_RESULT(no)
  1425. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1426. )
  1427. if [[ $dmalloc -eq 1 ]]; then
  1428. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1429. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1430. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1431. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1432. fi
  1433. AC_ARG_WITH(tcmalloc,
  1434. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1435. [ tcmalloc=yes ], [ tcmalloc=no ])
  1436. if test "x$tcmalloc" = "xyes"; then
  1437. LDFLAGS="-ltcmalloc $LDFLAGS"
  1438. fi
  1439. using_custom_malloc=no
  1440. if test "x$enable_openbsd_malloc" = "xyes"; then
  1441. using_custom_malloc=yes
  1442. fi
  1443. if test "x$tcmalloc" = "xyes"; then
  1444. using_custom_malloc=yes
  1445. fi
  1446. if test "$using_custom_malloc" = "no"; then
  1447. AC_CHECK_FUNCS(mallinfo)
  1448. fi
  1449. # By default, we're going to assume we don't have mlockall()
  1450. # bionic and other platforms have various broken mlockall subsystems.
  1451. # Some systems don't have a working mlockall, some aren't linkable,
  1452. # and some have it but don't declare it.
  1453. AC_CHECK_FUNCS(mlockall)
  1454. AC_CHECK_DECLS([mlockall], , , [
  1455. #ifdef HAVE_SYS_MMAN_H
  1456. #include <sys/mman.h>
  1457. #endif])
  1458. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1459. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1460. # using macros
  1461. AC_CHECK_DECLS([getpagesize], , , [
  1462. #ifdef HAVE_UNISTD_H
  1463. #include <unistd.h>
  1464. #endif])
  1465. # Allow user to specify an alternate syslog facility
  1466. AC_ARG_WITH(syslog-facility,
  1467. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1468. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1469. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1470. AC_SUBST(LOGFACILITY)
  1471. # Check if we have getresuid and getresgid
  1472. AC_CHECK_FUNCS(getresuid getresgid)
  1473. # Check for gethostbyname_r in all its glorious incompatible versions.
  1474. # (This logic is based on that in Python's configure.in)
  1475. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1476. [Define this if you have any gethostbyname_r()])
  1477. AC_CHECK_FUNC(gethostbyname_r, [
  1478. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1479. OLD_CFLAGS=$CFLAGS
  1480. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1481. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1482. #include <netdb.h>
  1483. ]], [[
  1484. char *cp1, *cp2;
  1485. struct hostent *h1, *h2;
  1486. int i1, i2;
  1487. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1488. ]])],[
  1489. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1490. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1491. [Define this if gethostbyname_r takes 6 arguments])
  1492. AC_MSG_RESULT(6)
  1493. ], [
  1494. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1495. #include <netdb.h>
  1496. ]], [[
  1497. char *cp1, *cp2;
  1498. struct hostent *h1;
  1499. int i1, i2;
  1500. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1501. ]])], [
  1502. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1503. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1504. [Define this if gethostbyname_r takes 5 arguments])
  1505. AC_MSG_RESULT(5)
  1506. ], [
  1507. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1508. #include <netdb.h>
  1509. ]], [[
  1510. char *cp1;
  1511. struct hostent *h1;
  1512. struct hostent_data hd;
  1513. (void) gethostbyname_r(cp1,h1,&hd);
  1514. ]])], [
  1515. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1516. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1517. [Define this if gethostbyname_r takes 3 arguments])
  1518. AC_MSG_RESULT(3)
  1519. ], [
  1520. AC_MSG_RESULT(0)
  1521. ])
  1522. ])
  1523. ])
  1524. CFLAGS=$OLD_CFLAGS
  1525. ])
  1526. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1527. tor_cv_have_func_macro,
  1528. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1529. #include <stdio.h>
  1530. int main(int c, char **v) { puts(__func__); }])],
  1531. tor_cv_have_func_macro=yes,
  1532. tor_cv_have_func_macro=no))
  1533. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1534. tor_cv_have_FUNC_macro,
  1535. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1536. #include <stdio.h>
  1537. int main(int c, char **v) { puts(__FUNC__); }])],
  1538. tor_cv_have_FUNC_macro=yes,
  1539. tor_cv_have_FUNC_macro=no))
  1540. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1541. tor_cv_have_FUNCTION_macro,
  1542. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1543. #include <stdio.h>
  1544. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1545. tor_cv_have_FUNCTION_macro=yes,
  1546. tor_cv_have_FUNCTION_macro=no))
  1547. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1548. tor_cv_have_environ_declared,
  1549. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1550. #ifdef HAVE_UNISTD_H
  1551. #include <unistd.h>
  1552. #endif
  1553. #include <stdlib.h>
  1554. int main(int c, char **v) { char **t = environ; }])],
  1555. tor_cv_have_environ_declared=yes,
  1556. tor_cv_have_environ_declared=no))
  1557. if test "$tor_cv_have_func_macro" = "yes"; then
  1558. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1559. fi
  1560. if test "$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 "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1564. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1565. [Defined if the compiler supports __FUNCTION__])
  1566. fi
  1567. if test "$tor_cv_have_environ_declared" = "yes"; then
  1568. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1569. [Defined if we have extern char **environ already declared])
  1570. fi
  1571. # $prefix stores the value of the --prefix command line option, or
  1572. # NONE if the option wasn't set. In the case that it wasn't set, make
  1573. # it be the default, so that we can use it to expand directories now.
  1574. if test "x$prefix" = "xNONE"; then
  1575. prefix=$ac_default_prefix
  1576. fi
  1577. # and similarly for $exec_prefix
  1578. if test "x$exec_prefix" = "xNONE"; then
  1579. exec_prefix=$prefix
  1580. fi
  1581. if test "x$BUILDDIR" = "x"; then
  1582. BUILDDIR=`pwd`
  1583. fi
  1584. AC_SUBST(BUILDDIR)
  1585. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1586. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1587. if test "x$CONFDIR" = "x"; then
  1588. CONFDIR=`eval echo $sysconfdir/tor`
  1589. fi
  1590. AC_SUBST(CONFDIR)
  1591. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1592. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1593. BINDIR=`eval echo $bindir`
  1594. AC_SUBST(BINDIR)
  1595. LOCALSTATEDIR=`eval echo $localstatedir`
  1596. AC_SUBST(LOCALSTATEDIR)
  1597. if test "$bwin32" = "true"; then
  1598. # Test if the linker supports the --nxcompat and --dynamicbase options
  1599. # for Windows
  1600. save_LDFLAGS="$LDFLAGS"
  1601. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1602. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1603. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1604. [AC_MSG_RESULT([yes])]
  1605. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1606. [AC_MSG_RESULT([no])]
  1607. )
  1608. LDFLAGS="$save_LDFLAGS"
  1609. fi
  1610. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1611. # than autoconf's macros like.
  1612. if test "$GCC" = "yes"; then
  1613. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1614. # accident waiting to happen.
  1615. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1616. else
  1617. # Override optimization level for non-gcc compilers
  1618. CFLAGS="$CFLAGS -O"
  1619. enable_gcc_warnings=no
  1620. enable_gcc_warnings_advisory=no
  1621. fi
  1622. # Warnings implies advisory-warnings and -Werror.
  1623. if test "$enable_gcc_warnings" = "yes"; then
  1624. enable_gcc_warnings_advisory=yes
  1625. enable_fatal_warnings=yes
  1626. fi
  1627. # OS X Lion started deprecating the system openssl. Let's just disable
  1628. # all deprecation warnings on OS X. Also, to potentially make the binary
  1629. # a little smaller, let's enable dead_strip.
  1630. case "$host_os" in
  1631. darwin*)
  1632. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1633. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1634. esac
  1635. # Add some more warnings which we use in development but not in the
  1636. # released versions. (Some relevant gcc versions can't handle these.)
  1637. #
  1638. # Note that we have to do this near the end of the autoconf process, or
  1639. # else we may run into problems when these warnings hit on the testing C
  1640. # programs that autoconf wants to build.
  1641. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1642. case "$host" in
  1643. *-*-openbsd* | *-*-bitrig*)
  1644. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1645. # That's fine, except that the headers don't pass -Wredundant-decls.
  1646. # Therefore, let's disable -Wsystem-headers when we're building
  1647. # with maximal warnings on OpenBSD.
  1648. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1649. esac
  1650. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1651. # have it work better.
  1652. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1653. # This warning was added in gcc 4.3, but it appears to generate
  1654. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1655. #CFLAGS="$CFLAGS -Wlogical-op"
  1656. m4_foreach_w([warning_flag], [
  1657. -Waddress
  1658. -Waddress-of-array-temporary
  1659. -Waddress-of-temporary
  1660. -Wambiguous-macro
  1661. -Wanonymous-pack-parens
  1662. -Warc
  1663. -Warc-abi
  1664. -Warc-bridge-casts-disallowed-in-nonarc
  1665. -Warc-maybe-repeated-use-of-weak
  1666. -Warc-performSelector-leaks
  1667. -Warc-repeated-use-of-weak
  1668. -Warray-bounds
  1669. -Warray-bounds-pointer-arithmetic
  1670. -Wasm
  1671. -Wasm-operand-widths
  1672. -Watomic-properties
  1673. -Watomic-property-with-user-defined-accessor
  1674. -Wauto-import
  1675. -Wauto-storage-class
  1676. -Wauto-var-id
  1677. -Wavailability
  1678. -Wbackslash-newline-escape
  1679. -Wbad-array-new-length
  1680. -Wbind-to-temporary-copy
  1681. -Wbitfield-constant-conversion
  1682. -Wbool-conversion
  1683. -Wbool-conversions
  1684. -Wbuiltin-requires-header
  1685. -Wchar-align
  1686. -Wcompare-distinct-pointer-types
  1687. -Wcomplex-component-init
  1688. -Wconditional-type-mismatch
  1689. -Wconfig-macros
  1690. -Wconstant-conversion
  1691. -Wconstant-logical-operand
  1692. -Wconstexpr-not-const
  1693. -Wcustom-atomic-properties
  1694. -Wdangling-field
  1695. -Wdangling-initializer-list
  1696. -Wdate-time
  1697. -Wdelegating-ctor-cycles
  1698. -Wdeprecated-implementations
  1699. -Wdeprecated-register
  1700. -Wdirect-ivar-access
  1701. -Wdiscard-qual
  1702. -Wdistributed-object-modifiers
  1703. -Wdivision-by-zero
  1704. -Wdollar-in-identifier-extension
  1705. -Wdouble-promotion
  1706. -Wduplicate-decl-specifier
  1707. -Wduplicate-enum
  1708. -Wduplicate-method-arg
  1709. -Wduplicate-method-match
  1710. -Wduplicated-cond
  1711. -Wdynamic-class-memaccess
  1712. -Wembedded-directive
  1713. -Wempty-translation-unit
  1714. -Wenum-conversion
  1715. -Wexit-time-destructors
  1716. -Wexplicit-ownership-type
  1717. -Wextern-initializer
  1718. -Wextra
  1719. -Wextra-semi
  1720. -Wextra-tokens
  1721. -Wflexible-array-extensions
  1722. -Wfloat-conversion
  1723. -Wformat-non-iso
  1724. -Wfour-char-constants
  1725. -Wgcc-compat
  1726. -Wglobal-constructors
  1727. -Wgnu-array-member-paren-init
  1728. -Wgnu-designator
  1729. -Wgnu-static-float-init
  1730. -Wheader-guard
  1731. -Wheader-hygiene
  1732. -Widiomatic-parentheses
  1733. -Wignored-attributes
  1734. -Wimplicit-atomic-properties
  1735. -Wimplicit-conversion-floating-point-to-bool
  1736. -Wimplicit-exception-spec-mismatch
  1737. -Wimplicit-fallthrough
  1738. -Wimplicit-fallthrough-per-function
  1739. -Wimplicit-retain-self
  1740. -Wimport-preprocessor-directive-pedantic
  1741. -Wincompatible-library-redeclaration
  1742. -Wincompatible-pointer-types-discards-qualifiers
  1743. -Wincomplete-implementation
  1744. -Wincomplete-module
  1745. -Wincomplete-umbrella
  1746. -Winit-self
  1747. -Wint-conversions
  1748. -Wint-to-void-pointer-cast
  1749. -Winteger-overflow
  1750. -Winvalid-constexpr
  1751. -Winvalid-iboutlet
  1752. -Winvalid-noreturn
  1753. -Winvalid-pp-token
  1754. -Winvalid-source-encoding
  1755. -Winvalid-token-paste
  1756. -Wknr-promoted-parameter
  1757. -Wlanguage-extension-token
  1758. -Wlarge-by-value-copy
  1759. -Wliteral-conversion
  1760. -Wliteral-range
  1761. -Wlocal-type-template-args
  1762. -Wlogical-op
  1763. -Wloop-analysis
  1764. -Wmain-return-type
  1765. -Wmalformed-warning-check
  1766. -Wmethod-signatures
  1767. -Wmicrosoft
  1768. -Wmicrosoft-exists
  1769. -Wmismatched-parameter-types
  1770. -Wmismatched-return-types
  1771. -Wmissing-field-initializers
  1772. -Wmissing-format-attribute
  1773. -Wmissing-noreturn
  1774. -Wmissing-selector-name
  1775. -Wmissing-sysroot
  1776. -Wmissing-variable-declarations
  1777. -Wmodule-conflict
  1778. -Wnested-anon-types
  1779. -Wnewline-eof
  1780. -Wnon-literal-null-conversion
  1781. -Wnon-pod-varargs
  1782. -Wnonportable-cfstrings
  1783. -Wnormalized=id
  1784. -Wnull-arithmetic
  1785. -Wnull-character
  1786. -Wnull-conversion
  1787. -Wnull-dereference
  1788. -Wout-of-line-declaration
  1789. -Wover-aligned
  1790. -Woverlength-strings
  1791. -Woverride-init
  1792. -Woverriding-method-mismatch
  1793. -Wpointer-type-mismatch
  1794. -Wpredefined-identifier-outside-function
  1795. -Wprotocol-property-synthesis-ambiguity
  1796. -Wreadonly-iboutlet-property
  1797. -Wreadonly-setter-attrs
  1798. -Wreceiver-expr
  1799. -Wreceiver-forward-class
  1800. -Wreceiver-is-weak
  1801. -Wreinterpret-base-class
  1802. -Wrequires-super-attribute
  1803. -Wreserved-user-defined-literal
  1804. -Wreturn-stack-address
  1805. -Wsection
  1806. -Wselector-type-mismatch
  1807. -Wsentinel
  1808. -Wserialized-diagnostics
  1809. -Wshadow
  1810. -Wshift-count-negative
  1811. -Wshift-count-overflow
  1812. -Wshift-negative-value
  1813. -Wshift-overflow=2
  1814. -Wshift-sign-overflow
  1815. -Wshorten-64-to-32
  1816. -Wsizeof-array-argument
  1817. -Wsource-uses-openmp
  1818. -Wstatic-float-init
  1819. -Wstatic-in-inline
  1820. -Wstatic-local-in-inline
  1821. -Wstrict-overflow=1
  1822. -Wstring-compare
  1823. -Wstring-conversion
  1824. -Wstrlcpy-strlcat-size
  1825. -Wstrncat-size
  1826. -Wsuggest-attribute=format
  1827. -Wsuggest-attribute=noreturn
  1828. -Wsuper-class-method-mismatch
  1829. -Wswitch-bool
  1830. -Wsync-nand
  1831. -Wtautological-constant-out-of-range-compare
  1832. -Wtentative-definition-incomplete-type
  1833. -Wtrampolines
  1834. -Wtype-safety
  1835. -Wtypedef-redefinition
  1836. -Wtypename-missing
  1837. -Wundefined-inline
  1838. -Wundefined-internal
  1839. -Wundefined-reinterpret-cast
  1840. -Wunicode
  1841. -Wunicode-whitespace
  1842. -Wunknown-warning-option
  1843. -Wunnamed-type-template-args
  1844. -Wunneeded-member-function
  1845. -Wunsequenced
  1846. -Wunsupported-visibility
  1847. -Wunused-but-set-parameter
  1848. -Wunused-but-set-variable
  1849. -Wunused-command-line-argument
  1850. -Wunused-const-variable=2
  1851. -Wunused-exception-parameter
  1852. -Wunused-local-typedefs
  1853. -Wunused-member-function
  1854. -Wunused-sanitize-argument
  1855. -Wunused-volatile-lvalue
  1856. -Wuser-defined-literals
  1857. -Wvariadic-macros
  1858. -Wvector-conversion
  1859. -Wvector-conversions
  1860. -Wvexing-parse
  1861. -Wvisibility
  1862. -Wvla-extension
  1863. -Wzero-length-array
  1864. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1865. dnl We should re-enable this in some later version. Clang doesn't
  1866. dnl mind, but it causes trouble with GCC.
  1867. dnl -Wstrict-overflow=2
  1868. dnl These seem to require annotations that we don't currently use,
  1869. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1870. dnl -Wthread-safety
  1871. dnl -Wthread-safety-analysis
  1872. dnl -Wthread-safety-attributes
  1873. dnl -Wthread-safety-beta
  1874. dnl -Wthread-safety-precise
  1875. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1876. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1877. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1878. CFLAGS="$CFLAGS -Wwrite-strings"
  1879. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1880. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1881. CFLAGS="$CFLAGS -Wunused-parameter "
  1882. # These interfere with building main() { return 0; }, which autoconf
  1883. # likes to use as its default program.
  1884. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1885. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1886. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1887. fi
  1888. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1889. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1890. fi
  1891. if test "x$enable_fatal_warnings" = "xyes"; then
  1892. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1893. # default autoconf programs are full of errors.
  1894. CFLAGS="$CFLAGS -Werror"
  1895. fi
  1896. fi
  1897. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1898. case "$host_os" in
  1899. darwin*)
  1900. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1901. esac
  1902. fi
  1903. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1904. AC_CONFIG_FILES([
  1905. Doxyfile
  1906. Makefile
  1907. contrib/dist/suse/tor.sh
  1908. contrib/operator-tools/tor.logrotate
  1909. contrib/dist/tor.sh
  1910. contrib/dist/torctl
  1911. contrib/dist/tor.service
  1912. src/config/torrc.sample
  1913. src/config/torrc.minimal
  1914. src/rust/.cargo/config
  1915. scripts/maint/checkOptionDocs.pl
  1916. scripts/maint/updateVersions.pl
  1917. ])
  1918. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1919. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1920. for file in $regular_mans ; do
  1921. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1922. echo "==================================";
  1923. echo;
  1924. echo "Building Tor has failed since manpages cannot be built.";
  1925. echo;
  1926. echo "You need asciidoc installed to be able to build the manpages.";
  1927. echo "To build without manpages, use the --disable-asciidoc argument";
  1928. echo "when calling configure.";
  1929. echo;
  1930. echo "==================================";
  1931. exit 1;
  1932. fi
  1933. done
  1934. fi
  1935. if test "$fragile_hardening" = "yes"; then
  1936. AC_MSG_WARN([
  1937. ============
  1938. Warning! Building Tor with --enable-fragile-hardening (also known as
  1939. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  1940. other kinds of attacks easier. A Tor instance build with this option will be
  1941. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  1942. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  1943. denial of service attacks. For more information, see
  1944. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  1945. ============
  1946. ])
  1947. fi
  1948. AC_OUTPUT