configure.ac 70 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],[0.3.2.12-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, [ \
  211. python3 \
  212. python3.8 python3.7 python3.6 python3.5 python3.4 \
  213. python \
  214. python2 python2.7])
  215. if test "x$PYTHON" = "x"; then
  216. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  217. fi
  218. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  219. dnl List all external rust crates we depend on here. Include the version
  220. rust_crates="libc-0.2.22"
  221. AC_SUBST(rust_crates)
  222. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  223. AC_C_FLEXIBLE_ARRAY_MEMBER
  224. ], [
  225. dnl Maybe we've got an old autoconf...
  226. AC_CACHE_CHECK([for flexible array members],
  227. tor_cv_c_flexarray,
  228. [AC_COMPILE_IFELSE(
  229. AC_LANG_PROGRAM([
  230. struct abc { int a; char b[]; };
  231. ], [
  232. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  233. def->b[0] = 33;
  234. ]),
  235. [tor_cv_c_flexarray=yes],
  236. [tor_cv_c_flexarray=no])])
  237. if test "$tor_cv_flexarray" = "yes"; then
  238. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  239. else
  240. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  241. fi
  242. ])
  243. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  244. tor_cv_c_c99_decl,
  245. [AC_COMPILE_IFELSE(
  246. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  247. [tor_cv_c_c99_decl=yes],
  248. [tor_cv_c_c99_decl=no] )])
  249. if test "$tor_cv_c_c99_decl" != "yes"; then
  250. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  251. fi
  252. AC_CACHE_CHECK([for working C99 designated initializers],
  253. tor_cv_c_c99_designated_init,
  254. [AC_COMPILE_IFELSE(
  255. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  256. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  257. [tor_cv_c_c99_designated_init=yes],
  258. [tor_cv_c_c99_designated_init=no] )])
  259. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  260. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  261. fi
  262. TORUSER=_tor
  263. AC_ARG_WITH(tor-user,
  264. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  265. [
  266. TORUSER=$withval
  267. ]
  268. )
  269. AC_SUBST(TORUSER)
  270. TORGROUP=_tor
  271. AC_ARG_WITH(tor-group,
  272. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  273. [
  274. TORGROUP=$withval
  275. ]
  276. )
  277. AC_SUBST(TORGROUP)
  278. dnl If _WIN32 is defined and non-zero, we are building for win32
  279. AC_MSG_CHECKING([for win32])
  280. AC_RUN_IFELSE([AC_LANG_SOURCE([
  281. int main(int c, char **v) {
  282. #ifdef _WIN32
  283. #if _WIN32
  284. return 0;
  285. #else
  286. return 1;
  287. #endif
  288. #else
  289. return 2;
  290. #endif
  291. }])],
  292. bwin32=true; AC_MSG_RESULT([yes]),
  293. bwin32=false; AC_MSG_RESULT([no]),
  294. bwin32=cross; AC_MSG_RESULT([cross])
  295. )
  296. if test "$bwin32" = "cross"; then
  297. AC_MSG_CHECKING([for win32 (cross)])
  298. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  299. #ifdef _WIN32
  300. int main(int c, char **v) {return 0;}
  301. #else
  302. #error
  303. int main(int c, char **v) {return x(y);}
  304. #endif
  305. ])],
  306. bwin32=true; AC_MSG_RESULT([yes]),
  307. bwin32=false; AC_MSG_RESULT([no]))
  308. fi
  309. AH_BOTTOM([
  310. #ifdef _WIN32
  311. /* Defined to access windows functions and definitions for >=WinXP */
  312. # ifndef WINVER
  313. # define WINVER 0x0501
  314. # endif
  315. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  316. # ifndef _WIN32_WINNT
  317. # define _WIN32_WINNT 0x0501
  318. # endif
  319. /* Defined to avoid including some windows headers as part of Windows.h */
  320. # ifndef WIN32_LEAN_AND_MEAN
  321. # define WIN32_LEAN_AND_MEAN 1
  322. # endif
  323. #endif
  324. ])
  325. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  326. dnl Enable C99 when compiling with MIPSpro
  327. AC_MSG_CHECKING([for MIPSpro compiler])
  328. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  329. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  330. #error
  331. return x(y);
  332. #endif
  333. ])],
  334. bmipspro=false; AC_MSG_RESULT(no),
  335. bmipspro=true; AC_MSG_RESULT(yes))
  336. if test "$bmipspro" = "true"; then
  337. CFLAGS="$CFLAGS -c99"
  338. fi
  339. AC_C_BIGENDIAN
  340. if test "x$enable_rust" = "xyes"; then
  341. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  342. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  343. if test "x$RUSTC" = "xno"; then
  344. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  345. fi
  346. AC_ARG_VAR([CARGO], [path to the cargo binary])
  347. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  348. if test "x$CARGO" = "xno"; then
  349. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  350. fi
  351. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  352. if test "x$enable_cargo_online_mode" = "xyes"; then
  353. CARGO_ONLINE=
  354. RUST_DL=#
  355. else
  356. CARGO_ONLINE=--frozen
  357. RUST_DL=
  358. dnl When we're not allowed to touch the network, we need crate dependencies
  359. dnl locally available.
  360. AC_MSG_CHECKING([rust crate dependencies])
  361. AC_ARG_VAR([RUST_DEPENDENCIES], [path to directory with local crate mirror])
  362. if test "x$RUST_DEPENDENCIES" = "x"; then
  363. RUST_DEPENDENCIES="$srcdir/src/ext/rust/"
  364. NEED_MOD=1
  365. fi
  366. if test ! -d "$RUST_DEPENDENCIES"; then
  367. 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.])
  368. fi
  369. for dep in $rust_crates; do
  370. if test ! -d "$RUST_DEPENDENCIES"/"$dep"; then
  371. 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.])
  372. fi
  373. done
  374. if test "x$NEED_MOD" = "x1"; then
  375. dnl When looking for dependencies from cargo, pick right directory
  376. RUST_DEPENDENCIES="../../src/ext/rust"
  377. fi
  378. fi
  379. dnl This is a workaround for #46797
  380. dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ). Once the
  381. dnl upstream bug is fixed, we can remove this workaround.
  382. case "$host_os" in
  383. darwin*)
  384. TOR_RUST_EXTRA_LIBS="-lresolv"
  385. ;;
  386. esac
  387. dnl For now both MSVC and MinGW rust libraries will output static libs with
  388. dnl the MSVC naming convention.
  389. if test "$bwin32" = "true"; then
  390. TOR_RUST_UTIL_STATIC_NAME=tor_util.lib
  391. else
  392. TOR_RUST_UTIL_STATIC_NAME=libtor_util.a
  393. fi
  394. AC_SUBST(TOR_RUST_UTIL_STATIC_NAME)
  395. AC_SUBST(CARGO_ONLINE)
  396. AC_SUBST(RUST_DL)
  397. dnl Let's check the rustc version, too
  398. AC_MSG_CHECKING([rust version])
  399. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  400. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  401. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  402. AC_MSG_ERROR([rustc version couldn't be identified])
  403. fi
  404. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  405. AC_MSG_ERROR([rustc must be at least version 1.14])
  406. fi
  407. fi
  408. AC_SUBST(TOR_RUST_EXTRA_LIBS)
  409. AC_SEARCH_LIBS(socket, [socket network])
  410. AC_SEARCH_LIBS(gethostbyname, [nsl])
  411. AC_SEARCH_LIBS(dlopen, [dl])
  412. AC_SEARCH_LIBS(inet_aton, [resolv])
  413. AC_SEARCH_LIBS(backtrace, [execinfo])
  414. saved_LIBS="$LIBS"
  415. AC_SEARCH_LIBS([clock_gettime], [rt])
  416. if test "$LIBS" != "$saved_LIBS"; then
  417. # Looks like we need -lrt for clock_gettime().
  418. have_rt=yes
  419. fi
  420. if test "$bwin32" = "false"; then
  421. AC_SEARCH_LIBS(pthread_create, [pthread])
  422. AC_SEARCH_LIBS(pthread_detach, [pthread])
  423. fi
  424. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  425. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  426. AC_CHECK_FUNCS(
  427. _NSGetEnviron \
  428. RtlSecureZeroMemory \
  429. SecureZeroMemory \
  430. accept4 \
  431. backtrace \
  432. backtrace_symbols_fd \
  433. eventfd \
  434. explicit_bzero \
  435. timingsafe_memcmp \
  436. flock \
  437. ftime \
  438. get_current_dir_name \
  439. getaddrinfo \
  440. getifaddrs \
  441. getpass \
  442. getrlimit \
  443. gettimeofday \
  444. gmtime_r \
  445. gnu_get_libc_version \
  446. htonll \
  447. inet_aton \
  448. ioctl \
  449. issetugid \
  450. llround \
  451. localtime_r \
  452. lround \
  453. memmem \
  454. memset_s \
  455. pipe \
  456. pipe2 \
  457. prctl \
  458. readpassphrase \
  459. rint \
  460. sigaction \
  461. socketpair \
  462. statvfs \
  463. strlcat \
  464. strlcpy \
  465. strnlen \
  466. strptime \
  467. strtok_r \
  468. strtoull \
  469. sysconf \
  470. sysctl \
  471. truncate \
  472. uname \
  473. usleep \
  474. vasprintf \
  475. _vscprintf
  476. )
  477. # Apple messed up when they added two functions functions in Sierra: they
  478. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  479. # checks. So we should only probe for those functions if we are sure that we
  480. # are not targetting OSX 10.11 or earlier.
  481. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  482. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  483. #ifdef __APPLE__
  484. # include <AvailabilityMacros.h>
  485. # ifndef MAC_OS_X_VERSION_10_12
  486. # define MAC_OS_X_VERSION_10_12 101200
  487. # endif
  488. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  489. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  490. # error "Running on Mac OSX 10.11 or earlier"
  491. # endif
  492. # endif
  493. #endif
  494. ]], [[]])],
  495. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  496. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  497. if test "$on_macos_pre_10_12" = "no"; then
  498. AC_CHECK_FUNCS(
  499. clock_gettime \
  500. getentropy \
  501. )
  502. fi
  503. if test "$bwin32" != "true"; then
  504. AC_CHECK_HEADERS(pthread.h)
  505. AC_CHECK_FUNCS(pthread_create)
  506. AC_CHECK_FUNCS(pthread_condattr_setclock)
  507. fi
  508. if test "$bwin32" = "true"; then
  509. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  510. #include <windows.h>
  511. #include <conio.h>
  512. #include <wchar.h>
  513. ])
  514. fi
  515. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  516. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  517. dnl ------------------------------------------------------
  518. dnl Where do you live, libevent? And how do we call you?
  519. if test "$bwin32" = "true"; then
  520. TOR_LIB_WS32=-lws2_32
  521. TOR_LIB_IPHLPAPI=-liphlpapi
  522. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  523. # think it's actually necessary.
  524. TOR_LIB_GDI=-lgdi32
  525. TOR_LIB_USERENV=-luserenv
  526. else
  527. TOR_LIB_WS32=
  528. TOR_LIB_GDI=
  529. TOR_LIB_USERENV=
  530. fi
  531. AC_SUBST(TOR_LIB_WS32)
  532. AC_SUBST(TOR_LIB_GDI)
  533. AC_SUBST(TOR_LIB_IPHLPAPI)
  534. AC_SUBST(TOR_LIB_USERENV)
  535. tor_libevent_pkg_redhat="libevent"
  536. tor_libevent_pkg_debian="libevent-dev"
  537. tor_libevent_devpkg_redhat="libevent-devel"
  538. tor_libevent_devpkg_debian="libevent-dev"
  539. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  540. dnl linking for static builds.
  541. STATIC_LIBEVENT_FLAGS=""
  542. if test "$enable_static_libevent" = "yes"; then
  543. if test "$have_rt" = "yes"; then
  544. STATIC_LIBEVENT_FLAGS=" -lrt "
  545. fi
  546. fi
  547. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  548. #ifdef _WIN32
  549. #include <winsock2.h>
  550. #endif
  551. #include <sys/time.h>
  552. #include <sys/types.h>
  553. #include <event2/event.h>], [
  554. #ifdef _WIN32
  555. #include <winsock2.h>
  556. #endif
  557. struct event_base;
  558. struct event_base *event_base_new(void);
  559. void event_base_free(struct event_base *);],
  560. [
  561. #ifdef _WIN32
  562. {WSADATA d; WSAStartup(0x101,&d); }
  563. #endif
  564. event_base_free(event_base_new());
  565. ], [--with-libevent-dir], [/opt/libevent])
  566. dnl Determine the incantation needed to link libevent.
  567. save_LIBS="$LIBS"
  568. save_LDFLAGS="$LDFLAGS"
  569. save_CPPFLAGS="$CPPFLAGS"
  570. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  571. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  572. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  573. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  574. if test "$enable_static_libevent" = "yes"; then
  575. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  576. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  577. else
  578. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  579. fi
  580. else
  581. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  582. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  583. 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"))
  584. if test "$ac_cv_search_event_new" != "none required"; then
  585. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  586. fi
  587. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  588. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  589. fi
  590. else
  591. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  592. fi
  593. fi
  594. dnl Now check for particular libevent functions.
  595. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  596. evutil_secure_rng_add_bytes \
  597. ])
  598. LIBS="$save_LIBS"
  599. LDFLAGS="$save_LDFLAGS"
  600. CPPFLAGS="$save_CPPFLAGS"
  601. dnl Check that libevent is at least at version 2.0.10, the first stable
  602. dnl release of its series
  603. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  604. AC_MSG_CHECKING([whether Libevent is new enough])
  605. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  606. #include <event2/event.h>
  607. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  608. #error
  609. int x = y(zz);
  610. #else
  611. int x = 1;
  612. #endif
  613. ])], [ AC_MSG_RESULT([yes]) ],
  614. [ AC_MSG_RESULT([no])
  615. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  616. LIBS="$save_LIBS"
  617. LDFLAGS="$save_LDFLAGS"
  618. CPPFLAGS="$save_CPPFLAGS"
  619. AC_SUBST(TOR_LIBEVENT_LIBS)
  620. dnl ------------------------------------------------------
  621. dnl Where do you live, libm?
  622. dnl On some platforms (Haiku/BeOS) the math library is
  623. dnl part of libroot. In which case don't link against lm
  624. TOR_LIB_MATH=""
  625. save_LIBS="$LIBS"
  626. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  627. if test "$ac_cv_search_pow" != "none required"; then
  628. TOR_LIB_MATH="$ac_cv_search_pow"
  629. fi
  630. LIBS="$save_LIBS"
  631. AC_SUBST(TOR_LIB_MATH)
  632. dnl ------------------------------------------------------
  633. dnl Where do you live, openssl? And how do we call you?
  634. tor_openssl_pkg_redhat="openssl"
  635. tor_openssl_pkg_debian="libssl-dev"
  636. tor_openssl_devpkg_redhat="openssl-devel"
  637. tor_openssl_devpkg_debian="libssl-dev"
  638. ALT_openssl_WITHVAL=""
  639. AC_ARG_WITH(ssl-dir,
  640. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  641. [
  642. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  643. ALT_openssl_WITHVAL="$withval"
  644. fi
  645. ])
  646. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  647. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  648. [#include <openssl/ssl.h>],
  649. [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
  650. [TLSv1_1_method();], [],
  651. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  652. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  653. if test "$enable_static_openssl" = "yes"; then
  654. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  655. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  656. else
  657. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  658. fi
  659. else
  660. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  661. fi
  662. AC_SUBST(TOR_OPENSSL_LIBS)
  663. dnl Now check for particular openssl functions.
  664. save_LIBS="$LIBS"
  665. save_LDFLAGS="$LDFLAGS"
  666. save_CPPFLAGS="$CPPFLAGS"
  667. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  668. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  669. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  670. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  671. #include <openssl/opensslv.h>
  672. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  673. #error "too old"
  674. #endif
  675. ]], [[]])],
  676. [ : ],
  677. [ 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.]) ])
  678. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  679. #include <openssl/opensslv.h>
  680. #include <openssl/evp.h>
  681. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  682. #error "no ECC"
  683. #endif
  684. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  685. #error "curves unavailable"
  686. #endif
  687. ]], [[]])],
  688. [ : ],
  689. [ 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.]) ])
  690. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  691. [#include <openssl/ssl.h>
  692. ])
  693. AC_CHECK_FUNCS([ \
  694. SSL_SESSION_get_master_key \
  695. SSL_get_server_random \
  696. SSL_get_client_ciphers \
  697. SSL_get_client_random \
  698. SSL_CIPHER_find \
  699. SSL_CTX_set_security_level \
  700. TLS_method
  701. ])
  702. dnl Check if OpenSSL has scrypt implementation.
  703. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  704. dnl Check if OpenSSL structures are opaque
  705. AC_CHECK_MEMBERS([SSL.state], , ,
  706. [#include <openssl/ssl.h>
  707. ])
  708. dnl Define the set of checks for KIST scheduler support.
  709. AC_DEFUN([CHECK_KIST_SUPPORT],[
  710. dnl KIST needs struct tcp_info and for certain members to exist.
  711. AC_CHECK_MEMBERS(
  712. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  713. , ,[[#include <netinet/tcp.h>]])
  714. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  715. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  716. #include <linux/sockios.h>
  717. #ifndef SIOCOUTQNSD
  718. #error
  719. #endif
  720. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  721. if test "x$have_siocoutqnsd" = "xyes"; then
  722. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  723. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  724. have_kist_support=yes
  725. fi
  726. fi
  727. fi
  728. ])
  729. dnl Now, trigger the check.
  730. CHECK_KIST_SUPPORT
  731. AS_IF([test "x$have_kist_support" = "xyes"],
  732. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  733. on this system])],
  734. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  735. LIBS="$save_LIBS"
  736. LDFLAGS="$save_LDFLAGS"
  737. CPPFLAGS="$save_CPPFLAGS"
  738. dnl ------------------------------------------------------
  739. dnl Where do you live, zlib? And how do we call you?
  740. tor_zlib_pkg_redhat="zlib"
  741. tor_zlib_pkg_debian="zlib1g"
  742. tor_zlib_devpkg_redhat="zlib-devel"
  743. tor_zlib_devpkg_debian="zlib1g-dev"
  744. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  745. [#include <zlib.h>],
  746. [const char * zlibVersion(void);],
  747. [zlibVersion();], [--with-zlib-dir],
  748. [/opt/zlib])
  749. if test "$enable_static_zlib" = "yes"; then
  750. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  751. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  752. using --enable-static-zlib")
  753. else
  754. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  755. fi
  756. else
  757. TOR_ZLIB_LIBS="-lz"
  758. fi
  759. AC_SUBST(TOR_ZLIB_LIBS)
  760. dnl ------------------------------------------------------
  761. dnl Where we do we find lzma?
  762. AC_ARG_ENABLE(lzma,
  763. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  764. [case "${enableval}" in
  765. "yes") lzma=true ;;
  766. "no") lzma=false ;;
  767. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  768. esac], [lzma=auto])
  769. if test "x$enable_lzma" = "xno"; then
  770. have_lzma=no;
  771. else
  772. PKG_CHECK_MODULES([LZMA],
  773. [liblzma],
  774. have_lzma=yes,
  775. have_lzma=no)
  776. if test "x$have_lzma" = "xno" ; then
  777. AC_MSG_WARN([Unable to find liblzma.])
  778. fi
  779. fi
  780. if test "x$have_lzma" = "xyes"; then
  781. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  782. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  783. TOR_LZMA_LIBS="${LZMA_LIBS}"
  784. fi
  785. AC_SUBST(TOR_LZMA_CFLAGS)
  786. AC_SUBST(TOR_LZMA_LIBS)
  787. dnl ------------------------------------------------------
  788. dnl Where we do we find zstd?
  789. AC_ARG_ENABLE(zstd,
  790. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  791. [case "${enableval}" in
  792. "yes") zstd=true ;;
  793. "no") zstd=false ;;
  794. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  795. esac], [zstd=auto])
  796. if test "x$enable_zstd" = "xno"; then
  797. have_zstd=no;
  798. else
  799. PKG_CHECK_MODULES([ZSTD],
  800. [libzstd >= 1.1],
  801. have_zstd=yes,
  802. have_zstd=no)
  803. if test "x$have_zstd" = "xno" ; then
  804. AC_MSG_WARN([Unable to find libzstd.])
  805. fi
  806. fi
  807. if test "x$have_zstd" = "xyes"; then
  808. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  809. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  810. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  811. fi
  812. AC_SUBST(TOR_ZSTD_CFLAGS)
  813. AC_SUBST(TOR_ZSTD_LIBS)
  814. dnl ----------------------------------------------------------------------
  815. dnl Check if libcap is available for capabilities.
  816. tor_cap_pkg_debian="libcap2"
  817. tor_cap_pkg_redhat="libcap"
  818. tor_cap_devpkg_debian="libcap-dev"
  819. tor_cap_devpkg_redhat="libcap-devel"
  820. AC_CHECK_LIB([cap], [cap_init], [],
  821. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  822. )
  823. AC_CHECK_FUNCS(cap_set_proc)
  824. dnl ---------------------------------------------------------------------
  825. dnl Now that we know about our major libraries, we can check for compiler
  826. dnl and linker hardening options. We need to do this with the libraries known,
  827. dnl since sometimes the linker will like an option but not be willing to
  828. dnl use it with a build of a library.
  829. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  830. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  831. CFLAGS_FTRAPV=
  832. CFLAGS_FWRAPV=
  833. CFLAGS_ASAN=
  834. CFLAGS_UBSAN=
  835. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  836. #if !defined(__clang__)
  837. #error
  838. #endif])], have_clang=yes, have_clang=no)
  839. if test "x$enable_gcc_hardening" != "xno"; then
  840. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  841. if test "x$have_clang" = "xyes"; then
  842. TOR_CHECK_CFLAGS(-Qunused-arguments)
  843. fi
  844. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  845. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  846. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  847. m4_ifdef([AS_VAR_IF],[
  848. AS_VAR_IF(can_compile, [yes],
  849. AS_VAR_IF(can_link, [yes],
  850. [],
  851. 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.)]))
  852. )])
  853. AS_VAR_POPDEF([can_link])
  854. AS_VAR_POPDEF([can_compile])
  855. TOR_CHECK_CFLAGS(-Wstack-protector)
  856. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  857. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  858. TOR_CHECK_CFLAGS(-fPIE)
  859. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  860. fi
  861. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  862. fi
  863. if test "$fragile_hardening" = "yes"; then
  864. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  865. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  866. 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.])
  867. fi
  868. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  869. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  870. fi
  871. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  872. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  873. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  874. fi
  875. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  876. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  877. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  878. fi
  879. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  880. fi
  881. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  882. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  883. mulodi_fixes_ftrapv=no
  884. if test "$have_clang" = "yes"; then
  885. saved_CFLAGS="$CFLAGS"
  886. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  887. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  888. AC_LINK_IFELSE([
  889. AC_LANG_SOURCE([[
  890. #include <stdint.h>
  891. #include <stdlib.h>
  892. int main(int argc, char **argv)
  893. {
  894. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  895. * (int64_t)atoi(argv[3]);
  896. return x == 9;
  897. } ]])],
  898. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  899. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  900. if test "$ftrapv_can_link" = "no"; then
  901. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  902. AC_LINK_IFELSE([
  903. AC_LANG_SOURCE([[
  904. #include <stdint.h>
  905. #include <stdlib.h>
  906. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  907. *overflow=0;
  908. return a;
  909. }
  910. int main(int argc, char **argv)
  911. {
  912. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  913. * (int64_t)atoi(argv[3]);
  914. return x == 9;
  915. } ]])],
  916. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  917. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  918. fi
  919. CFLAGS="$saved_CFLAGS"
  920. fi
  921. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  922. dnl These cflags add bunches of branches, and we haven't been able to
  923. dnl persuade ourselves that they're suitable for code that needs to be
  924. dnl constant time.
  925. AC_SUBST(CFLAGS_BUGTRAP)
  926. dnl These cflags are variant ones sutable for code that needs to be
  927. dnl constant-time.
  928. AC_SUBST(CFLAGS_CONSTTIME)
  929. if test "x$enable_linker_hardening" != "xno"; then
  930. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  931. fi
  932. # For backtrace support
  933. TOR_CHECK_LDFLAGS(-rdynamic)
  934. dnl ------------------------------------------------------
  935. dnl Now see if we have a -fomit-frame-pointer compiler option.
  936. saved_CFLAGS="$CFLAGS"
  937. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  938. F_OMIT_FRAME_POINTER=''
  939. if test "$saved_CFLAGS" != "$CFLAGS"; then
  940. if test "$fragile_hardening" = "yes"; then
  941. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  942. fi
  943. fi
  944. CFLAGS="$saved_CFLAGS"
  945. AC_SUBST(F_OMIT_FRAME_POINTER)
  946. dnl ------------------------------------------------------
  947. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  948. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  949. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  950. dnl code will work.
  951. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  952. dnl ============================================================
  953. dnl Check for libseccomp
  954. if test "x$enable_seccomp" != "xno"; then
  955. AC_CHECK_HEADERS([seccomp.h])
  956. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  957. fi
  958. dnl ============================================================
  959. dnl Check for libscrypt
  960. if test "x$enable_libscrypt" != "xno"; then
  961. AC_CHECK_HEADERS([libscrypt.h])
  962. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  963. AC_CHECK_FUNCS([libscrypt_scrypt])
  964. fi
  965. dnl ============================================================
  966. dnl We need an implementation of curve25519.
  967. dnl set these defaults.
  968. build_curve25519_donna=no
  969. build_curve25519_donna_c64=no
  970. use_curve25519_donna=no
  971. use_curve25519_nacl=no
  972. CURVE25519_LIBS=
  973. dnl The best choice is using curve25519-donna-c64, but that requires
  974. dnl that we
  975. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  976. tor_cv_can_use_curve25519_donna_c64,
  977. [AC_RUN_IFELSE(
  978. [AC_LANG_PROGRAM([dnl
  979. #include <stdint.h>
  980. typedef unsigned uint128_t __attribute__((mode(TI)));
  981. int func(uint64_t a, uint64_t b) {
  982. uint128_t c = ((uint128_t)a) * b;
  983. int ok = ((uint64_t)(c>>96)) == 522859 &&
  984. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  985. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  986. (((uint64_t)(c))&0xffffffffL) == 0;
  987. return ok;
  988. }
  989. ], [dnl
  990. int ok = func( ((uint64_t)2000000000) * 1000000000,
  991. ((uint64_t)1234567890) << 24);
  992. return !ok;
  993. ])],
  994. [tor_cv_can_use_curve25519_donna_c64=yes],
  995. [tor_cv_can_use_curve25519_donna_c64=no],
  996. [AC_LINK_IFELSE(
  997. [AC_LANG_PROGRAM([dnl
  998. #include <stdint.h>
  999. typedef unsigned uint128_t __attribute__((mode(TI)));
  1000. int func(uint64_t a, uint64_t b) {
  1001. uint128_t c = ((uint128_t)a) * b;
  1002. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1003. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1004. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1005. (((uint64_t)(c))&0xffffffffL) == 0;
  1006. return ok;
  1007. }
  1008. ], [dnl
  1009. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1010. ((uint64_t)1234567890) << 24);
  1011. return !ok;
  1012. ])],
  1013. [tor_cv_can_use_curve25519_donna_c64=cross],
  1014. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1015. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1016. nacl/crypto_scalarmult_curve25519.h])
  1017. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1018. tor_cv_can_use_curve25519_nacl,
  1019. [tor_saved_LIBS="$LIBS"
  1020. LIBS="$LIBS -lnacl"
  1021. AC_LINK_IFELSE(
  1022. [AC_LANG_PROGRAM([dnl
  1023. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1024. #include <crypto_scalarmult_curve25519.h>
  1025. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1026. #include <nacl/crypto_scalarmult_curve25519.h>
  1027. #endif
  1028. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1029. #error Hey, this is the reference implementation! That's not fast.
  1030. #endif
  1031. ], [
  1032. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1033. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1034. [tor_cv_can_use_curve25519_nacl=no])
  1035. LIBS="$tor_saved_LIBS" ])
  1036. dnl Okay, now we need to figure out which one to actually use. Fall back
  1037. dnl to curve25519-donna.c
  1038. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1039. build_curve25519_donna_c64=yes
  1040. use_curve25519_donna=yes
  1041. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1042. use_curve25519_nacl=yes
  1043. CURVE25519_LIBS=-lnacl
  1044. else
  1045. build_curve25519_donna=yes
  1046. use_curve25519_donna=yes
  1047. fi
  1048. if test "x$use_curve25519_donna" = "xyes"; then
  1049. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1050. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1051. fi
  1052. if test "x$use_curve25519_nacl" = "xyes"; then
  1053. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1054. [Defined if we should use a curve25519 from nacl])
  1055. fi
  1056. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1057. test "x$build_curve25519_donna" = "xyes")
  1058. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1059. test "x$build_curve25519_donna_c64" = "xyes")
  1060. AC_SUBST(CURVE25519_LIBS)
  1061. dnl Make sure to enable support for large off_t if available.
  1062. AC_SYS_LARGEFILE
  1063. AC_CHECK_HEADERS([assert.h \
  1064. errno.h \
  1065. fcntl.h \
  1066. signal.h \
  1067. string.h \
  1068. sys/capability.h \
  1069. sys/fcntl.h \
  1070. sys/stat.h \
  1071. sys/time.h \
  1072. sys/types.h \
  1073. time.h \
  1074. unistd.h \
  1075. arpa/inet.h \
  1076. crt_externs.h \
  1077. execinfo.h \
  1078. gnu/libc-version.h \
  1079. grp.h \
  1080. ifaddrs.h \
  1081. inttypes.h \
  1082. limits.h \
  1083. linux/types.h \
  1084. machine/limits.h \
  1085. malloc.h \
  1086. malloc/malloc.h \
  1087. malloc_np.h \
  1088. netdb.h \
  1089. netinet/in.h \
  1090. netinet/in6.h \
  1091. pwd.h \
  1092. readpassphrase.h \
  1093. stdint.h \
  1094. sys/eventfd.h \
  1095. sys/file.h \
  1096. sys/ioctl.h \
  1097. sys/limits.h \
  1098. sys/mman.h \
  1099. sys/param.h \
  1100. sys/prctl.h \
  1101. sys/random.h \
  1102. sys/resource.h \
  1103. sys/select.h \
  1104. sys/socket.h \
  1105. sys/statvfs.h \
  1106. sys/syscall.h \
  1107. sys/sysctl.h \
  1108. sys/syslimits.h \
  1109. sys/time.h \
  1110. sys/types.h \
  1111. sys/un.h \
  1112. sys/utime.h \
  1113. sys/wait.h \
  1114. syslog.h \
  1115. utime.h])
  1116. AC_CHECK_HEADERS(sys/param.h)
  1117. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1118. [#ifdef HAVE_SYS_TYPES_H
  1119. #include <sys/types.h>
  1120. #endif
  1121. #ifdef HAVE_SYS_SOCKET_H
  1122. #include <sys/socket.h>
  1123. #endif])
  1124. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1125. [#ifdef HAVE_SYS_TYPES_H
  1126. #include <sys/types.h>
  1127. #endif
  1128. #ifdef HAVE_SYS_SOCKET_H
  1129. #include <sys/socket.h>
  1130. #endif
  1131. #ifdef HAVE_NET_IF_H
  1132. #include <net/if.h>
  1133. #endif
  1134. #ifdef HAVE_NETINET_IN_H
  1135. #include <netinet/in.h>
  1136. #endif])
  1137. AC_CHECK_HEADERS(linux/if.h,[],[],
  1138. [
  1139. #ifdef HAVE_SYS_SOCKET_H
  1140. #include <sys/socket.h>
  1141. #endif
  1142. ])
  1143. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1144. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1145. [#ifdef HAVE_SYS_TYPES_H
  1146. #include <sys/types.h>
  1147. #endif
  1148. #ifdef HAVE_SYS_SOCKET_H
  1149. #include <sys/socket.h>
  1150. #endif
  1151. #ifdef HAVE_LIMITS_H
  1152. #include <limits.h>
  1153. #endif
  1154. #ifdef HAVE_LINUX_TYPES_H
  1155. #include <linux/types.h>
  1156. #endif
  1157. #ifdef HAVE_NETINET_IN6_H
  1158. #include <netinet/in6.h>
  1159. #endif
  1160. #ifdef HAVE_NETINET_IN_H
  1161. #include <netinet/in.h>
  1162. #endif])
  1163. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1164. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1165. [#ifdef HAVE_SYS_TYPES_H
  1166. #include <sys/types.h>
  1167. #endif
  1168. #ifdef HAVE_SYS_SOCKET_H
  1169. #include <sys/socket.h>
  1170. #endif
  1171. #ifdef HAVE_LIMITS_H
  1172. #include <limits.h>
  1173. #endif
  1174. #ifdef HAVE_LINUX_TYPES_H
  1175. #include <linux/types.h>
  1176. #endif
  1177. #ifdef HAVE_NETINET_IN6_H
  1178. #include <netinet/in6.h>
  1179. #endif
  1180. #ifdef HAVE_NETINET_IN_H
  1181. #include <netinet/in.h>
  1182. #endif
  1183. #ifdef HAVE_LINUX_IF_H
  1184. #include <linux/if.h>
  1185. #endif])
  1186. transparent_ok=0
  1187. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1188. transparent_ok=1
  1189. fi
  1190. if test "x$linux_netfilter_ipv4" = "x1"; then
  1191. transparent_ok=1
  1192. fi
  1193. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1194. transparent_ok=1
  1195. fi
  1196. if test "x$transparent_ok" = "x1"; then
  1197. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1198. else
  1199. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1200. fi
  1201. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1202. [#ifdef HAVE_SYS_TYPES_H
  1203. #include <sys/types.h>
  1204. #endif
  1205. #ifdef HAVE_SYS_TIME_H
  1206. #include <sys/time.h>
  1207. #endif])
  1208. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1209. dnl Watch out.
  1210. AC_CHECK_SIZEOF(int8_t)
  1211. AC_CHECK_SIZEOF(int16_t)
  1212. AC_CHECK_SIZEOF(int32_t)
  1213. AC_CHECK_SIZEOF(int64_t)
  1214. AC_CHECK_SIZEOF(uint8_t)
  1215. AC_CHECK_SIZEOF(uint16_t)
  1216. AC_CHECK_SIZEOF(uint32_t)
  1217. AC_CHECK_SIZEOF(uint64_t)
  1218. AC_CHECK_SIZEOF(intptr_t)
  1219. AC_CHECK_SIZEOF(uintptr_t)
  1220. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1221. AC_CHECK_SIZEOF(char)
  1222. AC_CHECK_SIZEOF(short)
  1223. AC_CHECK_SIZEOF(int)
  1224. AC_CHECK_SIZEOF(long)
  1225. AC_CHECK_SIZEOF(long long)
  1226. AC_CHECK_SIZEOF(__int64)
  1227. AC_CHECK_SIZEOF(void *)
  1228. AC_CHECK_SIZEOF(time_t)
  1229. AC_CHECK_SIZEOF(size_t)
  1230. AC_CHECK_SIZEOF(pid_t)
  1231. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1232. AC_PC_FROM_UCONTEXT([:])
  1233. dnl used to include sockaddr_storage, but everybody has that.
  1234. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1235. [#ifdef HAVE_SYS_TYPES_H
  1236. #include <sys/types.h>
  1237. #endif
  1238. #ifdef HAVE_NETINET_IN_H
  1239. #include <netinet/in.h>
  1240. #endif
  1241. #ifdef HAVE_NETINET_IN6_H
  1242. #include <netinet/in6.h>
  1243. #endif
  1244. #ifdef HAVE_SYS_SOCKET_H
  1245. #include <sys/socket.h>
  1246. #endif
  1247. #ifdef _WIN32
  1248. #define _WIN32_WINNT 0x0501
  1249. #define WIN32_LEAN_AND_MEAN
  1250. #include <winsock2.h>
  1251. #include <ws2tcpip.h>
  1252. #endif
  1253. ])
  1254. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1255. [#ifdef HAVE_SYS_TYPES_H
  1256. #include <sys/types.h>
  1257. #endif
  1258. #ifdef HAVE_NETINET_IN_H
  1259. #include <netinet/in.h>
  1260. #endif
  1261. #ifdef HAVE_NETINET_IN6_H
  1262. #include <netinet/in6.h>
  1263. #endif
  1264. #ifdef HAVE_SYS_SOCKET_H
  1265. #include <sys/socket.h>
  1266. #endif
  1267. #ifdef _WIN32
  1268. #define _WIN32_WINNT 0x0501
  1269. #define WIN32_LEAN_AND_MEAN
  1270. #include <winsock2.h>
  1271. #include <ws2tcpip.h>
  1272. #endif
  1273. ])
  1274. AC_CHECK_TYPES([rlim_t], , ,
  1275. [#ifdef HAVE_SYS_TYPES_H
  1276. #include <sys/types.h>
  1277. #endif
  1278. #ifdef HAVE_SYS_TIME_H
  1279. #include <sys/time.h>
  1280. #endif
  1281. #ifdef HAVE_SYS_RESOURCE_H
  1282. #include <sys/resource.h>
  1283. #endif
  1284. ])
  1285. AX_CHECK_SIGN([time_t],
  1286. [ : ],
  1287. [ : ], [
  1288. #ifdef HAVE_SYS_TYPES_H
  1289. #include <sys/types.h>
  1290. #endif
  1291. #ifdef HAVE_SYS_TIME_H
  1292. #include <sys/time.h>
  1293. #endif
  1294. #ifdef HAVE_TIME_H
  1295. #include <time.h>
  1296. #endif
  1297. ])
  1298. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1299. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1300. fi
  1301. AX_CHECK_SIGN([size_t],
  1302. [ tor_cv_size_t_signed=yes ],
  1303. [ tor_cv_size_t_signed=no ], [
  1304. #ifdef HAVE_SYS_TYPES_H
  1305. #include <sys/types.h>
  1306. #endif
  1307. ])
  1308. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1309. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1310. fi
  1311. AX_CHECK_SIGN([enum always],
  1312. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1313. [ : ], [
  1314. enum always { AAA, BBB, CCC };
  1315. ])
  1316. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1317. #ifdef HAVE_SYS_SOCKET_H
  1318. #include <sys/socket.h>
  1319. #endif
  1320. ])
  1321. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1322. AC_CHECK_SIZEOF(cell_t)
  1323. # Now make sure that NULL can be represented as zero bytes.
  1324. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1325. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1326. [[#include <stdlib.h>
  1327. #include <string.h>
  1328. #include <stdio.h>
  1329. #ifdef HAVE_STDDEF_H
  1330. #include <stddef.h>
  1331. #endif
  1332. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1333. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1334. [tor_cv_null_is_zero=yes],
  1335. [tor_cv_null_is_zero=no],
  1336. [tor_cv_null_is_zero=cross])])
  1337. if test "$tor_cv_null_is_zero" = "cross"; then
  1338. # Cross-compiling; let's hope that the target isn't raving mad.
  1339. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1340. fi
  1341. if test "$tor_cv_null_is_zero" != "no"; then
  1342. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1343. [Define to 1 iff memset(0) sets pointers to NULL])
  1344. fi
  1345. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1346. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1347. [[#include <stdlib.h>
  1348. #include <string.h>
  1349. #include <stdio.h>
  1350. #ifdef HAVE_STDDEF_H
  1351. #include <stddef.h>
  1352. #endif
  1353. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1354. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1355. [tor_cv_dbl0_is_zero=yes],
  1356. [tor_cv_dbl0_is_zero=no],
  1357. [tor_cv_dbl0_is_zero=cross])])
  1358. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1359. # Cross-compiling; let's hope that the target isn't raving mad.
  1360. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1361. fi
  1362. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1363. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1364. [Define to 1 iff memset(0) sets doubles to 0.0])
  1365. fi
  1366. # And what happens when we malloc zero?
  1367. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1368. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1369. [[#include <stdlib.h>
  1370. #include <string.h>
  1371. #include <stdio.h>
  1372. #ifdef HAVE_STDDEF_H
  1373. #include <stddef.h>
  1374. #endif
  1375. int main () { return malloc(0)?0:1; }]])],
  1376. [tor_cv_malloc_zero_works=yes],
  1377. [tor_cv_malloc_zero_works=no],
  1378. [tor_cv_malloc_zero_works=cross])])
  1379. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1380. # Cross-compiling; let's hope that the target isn't raving mad.
  1381. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1382. fi
  1383. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1384. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1385. [Define to 1 iff malloc(0) returns a pointer])
  1386. fi
  1387. # whether we seem to be in a 2s-complement world.
  1388. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1389. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1390. [[int main () { int problem = ((-99) != (~99)+1);
  1391. return problem ? 1 : 0; }]])],
  1392. [tor_cv_twos_complement=yes],
  1393. [tor_cv_twos_complement=no],
  1394. [tor_cv_twos_complement=cross])])
  1395. if test "$tor_cv_twos_complement" = "cross"; then
  1396. # Cross-compiling; let's hope that the target isn't raving mad.
  1397. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1398. fi
  1399. if test "$tor_cv_twos_complement" != "no"; then
  1400. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1401. [Define to 1 iff we represent negative integers with
  1402. two's complement])
  1403. fi
  1404. # What does shifting a negative value do?
  1405. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1406. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1407. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1408. [tor_cv_sign_extend=yes],
  1409. [tor_cv_sign_extend=no],
  1410. [tor_cv_sign_extend=cross])])
  1411. if test "$tor_cv_sign_extend" = "cross"; then
  1412. # Cross-compiling; let's hope that the target isn't raving mad.
  1413. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1414. fi
  1415. if test "$tor_cv_sign_extend" != "no"; then
  1416. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1417. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1418. fi
  1419. # Is uint8_t the same type as unsigned char?
  1420. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1421. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1422. #include <stdint.h>
  1423. extern uint8_t c;
  1424. unsigned char c;]])],
  1425. [tor_cv_uint8_uchar=yes],
  1426. [tor_cv_uint8_uchar=no],
  1427. [tor_cv_uint8_uchar=cross])])
  1428. if test "$tor_cv_uint8_uchar" = "cross"; then
  1429. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1430. fi
  1431. if test "$tor_cv_uint8_uchar" = "no"; then
  1432. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1433. fi
  1434. # Whether we should use the dmalloc memory allocation debugging library.
  1435. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1436. AC_ARG_WITH(dmalloc,
  1437. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1438. [if [[ "$withval" = "yes" ]]; then
  1439. dmalloc=1
  1440. AC_MSG_RESULT(yes)
  1441. else
  1442. dmalloc=1
  1443. AC_MSG_RESULT(no)
  1444. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1445. )
  1446. if [[ $dmalloc -eq 1 ]]; then
  1447. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1448. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1449. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1450. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1451. fi
  1452. AC_ARG_WITH(tcmalloc,
  1453. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1454. [ tcmalloc=yes ], [ tcmalloc=no ])
  1455. if test "x$tcmalloc" = "xyes"; then
  1456. LDFLAGS="-ltcmalloc $LDFLAGS"
  1457. fi
  1458. using_custom_malloc=no
  1459. if test "x$enable_openbsd_malloc" = "xyes"; then
  1460. using_custom_malloc=yes
  1461. fi
  1462. if test "x$tcmalloc" = "xyes"; then
  1463. using_custom_malloc=yes
  1464. fi
  1465. if test "$using_custom_malloc" = "no"; then
  1466. AC_CHECK_FUNCS(mallinfo)
  1467. fi
  1468. if test "$using_custom_malloc" = "yes"; then
  1469. # Tell the C compiler not to use the system allocator functions.
  1470. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1471. fi
  1472. # By default, we're going to assume we don't have mlockall()
  1473. # bionic and other platforms have various broken mlockall subsystems.
  1474. # Some systems don't have a working mlockall, some aren't linkable,
  1475. # and some have it but don't declare it.
  1476. AC_CHECK_FUNCS(mlockall)
  1477. AC_CHECK_DECLS([mlockall], , , [
  1478. #ifdef HAVE_SYS_MMAN_H
  1479. #include <sys/mman.h>
  1480. #endif])
  1481. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1482. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1483. # using macros
  1484. AC_CHECK_DECLS([getpagesize], , , [
  1485. #ifdef HAVE_UNISTD_H
  1486. #include <unistd.h>
  1487. #endif])
  1488. # Allow user to specify an alternate syslog facility
  1489. AC_ARG_WITH(syslog-facility,
  1490. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1491. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1492. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1493. AC_SUBST(LOGFACILITY)
  1494. # Check if we have getresuid and getresgid
  1495. AC_CHECK_FUNCS(getresuid getresgid)
  1496. # Check for gethostbyname_r in all its glorious incompatible versions.
  1497. # (This logic is based on that in Python's configure.in)
  1498. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1499. [Define this if you have any gethostbyname_r()])
  1500. AC_CHECK_FUNC(gethostbyname_r, [
  1501. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1502. OLD_CFLAGS=$CFLAGS
  1503. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1504. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1505. #include <netdb.h>
  1506. ]], [[
  1507. char *cp1, *cp2;
  1508. struct hostent *h1, *h2;
  1509. int i1, i2;
  1510. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1511. ]])],[
  1512. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1513. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1514. [Define this if gethostbyname_r takes 6 arguments])
  1515. AC_MSG_RESULT(6)
  1516. ], [
  1517. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1518. #include <netdb.h>
  1519. ]], [[
  1520. char *cp1, *cp2;
  1521. struct hostent *h1;
  1522. int i1, i2;
  1523. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1524. ]])], [
  1525. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1526. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1527. [Define this if gethostbyname_r takes 5 arguments])
  1528. AC_MSG_RESULT(5)
  1529. ], [
  1530. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1531. #include <netdb.h>
  1532. ]], [[
  1533. char *cp1;
  1534. struct hostent *h1;
  1535. struct hostent_data hd;
  1536. (void) gethostbyname_r(cp1,h1,&hd);
  1537. ]])], [
  1538. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1539. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1540. [Define this if gethostbyname_r takes 3 arguments])
  1541. AC_MSG_RESULT(3)
  1542. ], [
  1543. AC_MSG_RESULT(0)
  1544. ])
  1545. ])
  1546. ])
  1547. CFLAGS=$OLD_CFLAGS
  1548. ])
  1549. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1550. tor_cv_have_func_macro,
  1551. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1552. #include <stdio.h>
  1553. int main(int c, char **v) { puts(__func__); }])],
  1554. tor_cv_have_func_macro=yes,
  1555. tor_cv_have_func_macro=no))
  1556. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1557. tor_cv_have_FUNC_macro,
  1558. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1559. #include <stdio.h>
  1560. int main(int c, char **v) { puts(__FUNC__); }])],
  1561. tor_cv_have_FUNC_macro=yes,
  1562. tor_cv_have_FUNC_macro=no))
  1563. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1564. tor_cv_have_FUNCTION_macro,
  1565. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1566. #include <stdio.h>
  1567. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1568. tor_cv_have_FUNCTION_macro=yes,
  1569. tor_cv_have_FUNCTION_macro=no))
  1570. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1571. tor_cv_have_environ_declared,
  1572. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1573. #ifdef HAVE_UNISTD_H
  1574. #include <unistd.h>
  1575. #endif
  1576. #include <stdlib.h>
  1577. int main(int c, char **v) { char **t = environ; }])],
  1578. tor_cv_have_environ_declared=yes,
  1579. tor_cv_have_environ_declared=no))
  1580. if test "$tor_cv_have_func_macro" = "yes"; then
  1581. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1582. fi
  1583. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1584. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1585. fi
  1586. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1587. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1588. [Defined if the compiler supports __FUNCTION__])
  1589. fi
  1590. if test "$tor_cv_have_environ_declared" = "yes"; then
  1591. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1592. [Defined if we have extern char **environ already declared])
  1593. fi
  1594. # $prefix stores the value of the --prefix command line option, or
  1595. # NONE if the option wasn't set. In the case that it wasn't set, make
  1596. # it be the default, so that we can use it to expand directories now.
  1597. if test "x$prefix" = "xNONE"; then
  1598. prefix=$ac_default_prefix
  1599. fi
  1600. # and similarly for $exec_prefix
  1601. if test "x$exec_prefix" = "xNONE"; then
  1602. exec_prefix=$prefix
  1603. fi
  1604. if test "x$BUILDDIR" = "x"; then
  1605. BUILDDIR=`pwd`
  1606. fi
  1607. AC_SUBST(BUILDDIR)
  1608. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1609. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1610. if test "x$CONFDIR" = "x"; then
  1611. CONFDIR=`eval echo $sysconfdir/tor`
  1612. fi
  1613. AC_SUBST(CONFDIR)
  1614. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1615. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1616. BINDIR=`eval echo $bindir`
  1617. AC_SUBST(BINDIR)
  1618. LOCALSTATEDIR=`eval echo $localstatedir`
  1619. AC_SUBST(LOCALSTATEDIR)
  1620. if test "$bwin32" = "true"; then
  1621. # Test if the linker supports the --nxcompat and --dynamicbase options
  1622. # for Windows
  1623. save_LDFLAGS="$LDFLAGS"
  1624. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1625. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1626. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1627. [AC_MSG_RESULT([yes])]
  1628. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1629. [AC_MSG_RESULT([no])]
  1630. )
  1631. LDFLAGS="$save_LDFLAGS"
  1632. fi
  1633. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1634. # than autoconf's macros like.
  1635. if test "$GCC" = "yes"; then
  1636. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1637. # accident waiting to happen.
  1638. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1639. else
  1640. # Override optimization level for non-gcc compilers
  1641. CFLAGS="$CFLAGS -O"
  1642. enable_gcc_warnings=no
  1643. enable_gcc_warnings_advisory=no
  1644. fi
  1645. # Warnings implies advisory-warnings and -Werror.
  1646. if test "$enable_gcc_warnings" = "yes"; then
  1647. enable_gcc_warnings_advisory=yes
  1648. enable_fatal_warnings=yes
  1649. fi
  1650. # OS X Lion started deprecating the system openssl. Let's just disable
  1651. # all deprecation warnings on OS X. Also, to potentially make the binary
  1652. # a little smaller, let's enable dead_strip.
  1653. case "$host_os" in
  1654. darwin*)
  1655. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1656. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1657. esac
  1658. # Add some more warnings which we use in development but not in the
  1659. # released versions. (Some relevant gcc versions can't handle these.)
  1660. #
  1661. # Note that we have to do this near the end of the autoconf process, or
  1662. # else we may run into problems when these warnings hit on the testing C
  1663. # programs that autoconf wants to build.
  1664. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1665. case "$host" in
  1666. *-*-openbsd* | *-*-bitrig*)
  1667. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1668. # That's fine, except that the headers don't pass -Wredundant-decls.
  1669. # Therefore, let's disable -Wsystem-headers when we're building
  1670. # with maximal warnings on OpenBSD.
  1671. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1672. esac
  1673. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1674. # have it work better.
  1675. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1676. # This warning was added in gcc 4.3, but it appears to generate
  1677. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1678. #CFLAGS="$CFLAGS -Wlogical-op"
  1679. m4_foreach_w([warning_flag], [
  1680. -Waddress
  1681. -Waddress-of-array-temporary
  1682. -Waddress-of-temporary
  1683. -Wambiguous-macro
  1684. -Wanonymous-pack-parens
  1685. -Warc
  1686. -Warc-abi
  1687. -Warc-bridge-casts-disallowed-in-nonarc
  1688. -Warc-maybe-repeated-use-of-weak
  1689. -Warc-performSelector-leaks
  1690. -Warc-repeated-use-of-weak
  1691. -Warray-bounds
  1692. -Warray-bounds-pointer-arithmetic
  1693. -Wasm
  1694. -Wasm-operand-widths
  1695. -Watomic-properties
  1696. -Watomic-property-with-user-defined-accessor
  1697. -Wauto-import
  1698. -Wauto-storage-class
  1699. -Wauto-var-id
  1700. -Wavailability
  1701. -Wbackslash-newline-escape
  1702. -Wbad-array-new-length
  1703. -Wbind-to-temporary-copy
  1704. -Wbitfield-constant-conversion
  1705. -Wbool-conversion
  1706. -Wbool-conversions
  1707. -Wbuiltin-requires-header
  1708. -Wchar-align
  1709. -Wcompare-distinct-pointer-types
  1710. -Wcomplex-component-init
  1711. -Wconditional-type-mismatch
  1712. -Wconfig-macros
  1713. -Wconstant-conversion
  1714. -Wconstant-logical-operand
  1715. -Wconstexpr-not-const
  1716. -Wcustom-atomic-properties
  1717. -Wdangling-field
  1718. -Wdangling-initializer-list
  1719. -Wdate-time
  1720. -Wdelegating-ctor-cycles
  1721. -Wdeprecated-implementations
  1722. -Wdeprecated-register
  1723. -Wdirect-ivar-access
  1724. -Wdiscard-qual
  1725. -Wdistributed-object-modifiers
  1726. -Wdivision-by-zero
  1727. -Wdollar-in-identifier-extension
  1728. -Wdouble-promotion
  1729. -Wduplicate-decl-specifier
  1730. -Wduplicate-enum
  1731. -Wduplicate-method-arg
  1732. -Wduplicate-method-match
  1733. -Wduplicated-cond
  1734. -Wdynamic-class-memaccess
  1735. -Wembedded-directive
  1736. -Wempty-translation-unit
  1737. -Wenum-conversion
  1738. -Wexit-time-destructors
  1739. -Wexplicit-ownership-type
  1740. -Wextern-initializer
  1741. -Wextra
  1742. -Wextra-semi
  1743. -Wextra-tokens
  1744. -Wflexible-array-extensions
  1745. -Wfloat-conversion
  1746. -Wformat-non-iso
  1747. -Wfour-char-constants
  1748. -Wgcc-compat
  1749. -Wglobal-constructors
  1750. -Wgnu-array-member-paren-init
  1751. -Wgnu-designator
  1752. -Wgnu-static-float-init
  1753. -Wheader-guard
  1754. -Wheader-hygiene
  1755. -Widiomatic-parentheses
  1756. -Wignored-attributes
  1757. -Wimplicit-atomic-properties
  1758. -Wimplicit-conversion-floating-point-to-bool
  1759. -Wimplicit-exception-spec-mismatch
  1760. -Wimplicit-fallthrough
  1761. -Wimplicit-fallthrough-per-function
  1762. -Wimplicit-retain-self
  1763. -Wimport-preprocessor-directive-pedantic
  1764. -Wincompatible-library-redeclaration
  1765. -Wincompatible-pointer-types-discards-qualifiers
  1766. -Wincomplete-implementation
  1767. -Wincomplete-module
  1768. -Wincomplete-umbrella
  1769. -Winit-self
  1770. -Wint-conversions
  1771. -Wint-to-void-pointer-cast
  1772. -Winteger-overflow
  1773. -Winvalid-constexpr
  1774. -Winvalid-iboutlet
  1775. -Winvalid-noreturn
  1776. -Winvalid-pp-token
  1777. -Winvalid-source-encoding
  1778. -Winvalid-token-paste
  1779. -Wknr-promoted-parameter
  1780. -Wlanguage-extension-token
  1781. -Wlarge-by-value-copy
  1782. -Wliteral-conversion
  1783. -Wliteral-range
  1784. -Wlocal-type-template-args
  1785. -Wlogical-op
  1786. -Wloop-analysis
  1787. -Wmain-return-type
  1788. -Wmalformed-warning-check
  1789. -Wmethod-signatures
  1790. -Wmicrosoft
  1791. -Wmicrosoft-exists
  1792. -Wmismatched-parameter-types
  1793. -Wmismatched-return-types
  1794. -Wmissing-field-initializers
  1795. -Wmissing-format-attribute
  1796. -Wmissing-noreturn
  1797. -Wmissing-selector-name
  1798. -Wmissing-sysroot
  1799. -Wmissing-variable-declarations
  1800. -Wmodule-conflict
  1801. -Wnested-anon-types
  1802. -Wnewline-eof
  1803. -Wnon-literal-null-conversion
  1804. -Wnon-pod-varargs
  1805. -Wnonportable-cfstrings
  1806. -Wnormalized=id
  1807. -Wnull-arithmetic
  1808. -Wnull-character
  1809. -Wnull-conversion
  1810. -Wnull-dereference
  1811. -Wout-of-line-declaration
  1812. -Wover-aligned
  1813. -Woverlength-strings
  1814. -Woverride-init
  1815. -Woverriding-method-mismatch
  1816. -Wpointer-type-mismatch
  1817. -Wpredefined-identifier-outside-function
  1818. -Wprotocol-property-synthesis-ambiguity
  1819. -Wreadonly-iboutlet-property
  1820. -Wreadonly-setter-attrs
  1821. -Wreceiver-expr
  1822. -Wreceiver-forward-class
  1823. -Wreceiver-is-weak
  1824. -Wreinterpret-base-class
  1825. -Wrequires-super-attribute
  1826. -Wreserved-user-defined-literal
  1827. -Wreturn-stack-address
  1828. -Wsection
  1829. -Wselector-type-mismatch
  1830. -Wsentinel
  1831. -Wserialized-diagnostics
  1832. -Wshadow
  1833. -Wshift-count-negative
  1834. -Wshift-count-overflow
  1835. -Wshift-negative-value
  1836. -Wshift-overflow=2
  1837. -Wshift-sign-overflow
  1838. -Wshorten-64-to-32
  1839. -Wsizeof-array-argument
  1840. -Wsource-uses-openmp
  1841. -Wstatic-float-init
  1842. -Wstatic-in-inline
  1843. -Wstatic-local-in-inline
  1844. -Wstrict-overflow=1
  1845. -Wstring-compare
  1846. -Wstring-conversion
  1847. -Wstrlcpy-strlcat-size
  1848. -Wstrncat-size
  1849. -Wsuggest-attribute=format
  1850. -Wsuggest-attribute=noreturn
  1851. -Wsuper-class-method-mismatch
  1852. -Wswitch-bool
  1853. -Wsync-nand
  1854. -Wtautological-constant-out-of-range-compare
  1855. -Wtentative-definition-incomplete-type
  1856. -Wtrampolines
  1857. -Wtype-safety
  1858. -Wtypedef-redefinition
  1859. -Wtypename-missing
  1860. -Wundefined-inline
  1861. -Wundefined-internal
  1862. -Wundefined-reinterpret-cast
  1863. -Wunicode
  1864. -Wunicode-whitespace
  1865. -Wunknown-warning-option
  1866. -Wunnamed-type-template-args
  1867. -Wunneeded-member-function
  1868. -Wunsequenced
  1869. -Wunsupported-visibility
  1870. -Wunused-but-set-parameter
  1871. -Wunused-but-set-variable
  1872. -Wunused-command-line-argument
  1873. -Wunused-const-variable=2
  1874. -Wunused-exception-parameter
  1875. -Wunused-local-typedefs
  1876. -Wunused-member-function
  1877. -Wunused-sanitize-argument
  1878. -Wunused-volatile-lvalue
  1879. -Wuser-defined-literals
  1880. -Wvariadic-macros
  1881. -Wvector-conversion
  1882. -Wvector-conversions
  1883. -Wvexing-parse
  1884. -Wvisibility
  1885. -Wvla-extension
  1886. -Wzero-length-array
  1887. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1888. dnl We should re-enable this in some later version. Clang doesn't
  1889. dnl mind, but it causes trouble with GCC.
  1890. dnl -Wstrict-overflow=2
  1891. dnl These seem to require annotations that we don't currently use,
  1892. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1893. dnl -Wthread-safety
  1894. dnl -Wthread-safety-analysis
  1895. dnl -Wthread-safety-attributes
  1896. dnl -Wthread-safety-beta
  1897. dnl -Wthread-safety-precise
  1898. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1899. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1900. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1901. CFLAGS="$CFLAGS -Wwrite-strings"
  1902. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1903. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1904. CFLAGS="$CFLAGS -Wunused-parameter "
  1905. # These interfere with building main() { return 0; }, which autoconf
  1906. # likes to use as its default program.
  1907. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1908. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1909. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1910. fi
  1911. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1912. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1913. fi
  1914. if test "$tor_cv_cflags__warn_unused_const_variable_2" = "yes"; then
  1915. AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
  1916. fi
  1917. if test "x$enable_fatal_warnings" = "xyes"; then
  1918. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1919. # default autoconf programs are full of errors.
  1920. CFLAGS="$CFLAGS -Werror"
  1921. fi
  1922. fi
  1923. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1924. case "$host_os" in
  1925. darwin*)
  1926. 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.])
  1927. esac
  1928. fi
  1929. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1930. AC_CONFIG_FILES([
  1931. Doxyfile
  1932. Makefile
  1933. contrib/dist/suse/tor.sh
  1934. contrib/operator-tools/tor.logrotate
  1935. contrib/dist/tor.sh
  1936. contrib/dist/torctl
  1937. contrib/dist/tor.service
  1938. src/config/torrc.sample
  1939. src/config/torrc.minimal
  1940. src/rust/.cargo/config
  1941. scripts/maint/checkOptionDocs.pl
  1942. scripts/maint/updateVersions.pl
  1943. ])
  1944. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1945. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1946. for file in $regular_mans ; do
  1947. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1948. echo "==================================";
  1949. echo;
  1950. echo "Building Tor has failed since manpages cannot be built.";
  1951. echo;
  1952. echo "You need asciidoc installed to be able to build the manpages.";
  1953. echo "To build without manpages, use the --disable-asciidoc argument";
  1954. echo "when calling configure.";
  1955. echo;
  1956. echo "==================================";
  1957. exit 1;
  1958. fi
  1959. done
  1960. fi
  1961. if test "$fragile_hardening" = "yes"; then
  1962. AC_MSG_WARN([
  1963. ============
  1964. Warning! Building Tor with --enable-fragile-hardening (also known as
  1965. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  1966. other kinds of attacks easier. A Tor instance build with this option will be
  1967. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  1968. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  1969. denial of service attacks. For more information, see
  1970. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  1971. ============
  1972. ])
  1973. fi
  1974. AC_OUTPUT