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],[0.3.2.9-dev])
  7. AC_CONFIG_SRCDIR([src/or/main.c])
  8. AC_CONFIG_MACRO_DIR([m4])
  9. # "foreign" means we don't follow GNU package layout standards
  10. # "1.11" means we require automake version 1.11 or newer
  11. # "subdir-objects" means put .o files in the same directory as the .c files
  12. AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects -Wall -Werror])
  13. m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  14. AC_CONFIG_HEADERS([orconfig.h])
  15. AC_USE_SYSTEM_EXTENSIONS
  16. AC_CANONICAL_HOST
  17. PKG_PROG_PKG_CONFIG
  18. if test -f "/etc/redhat-release"; then
  19. if test -f "/usr/kerberos/include"; then
  20. CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
  21. fi
  22. fi
  23. # Not a no-op; we want to make sure that CPPFLAGS is set before we use
  24. # the += operator on it in src/or/Makefile.am
  25. CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
  26. AC_ARG_ENABLE(openbsd-malloc,
  27. AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
  28. AC_ARG_ENABLE(static-openssl,
  29. AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
  30. AC_ARG_ENABLE(static-libevent,
  31. AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
  32. AC_ARG_ENABLE(static-zlib,
  33. AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
  34. AC_ARG_ENABLE(static-tor,
  35. AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
  36. AC_ARG_ENABLE(unittests,
  37. AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
  38. AC_ARG_ENABLE(coverage,
  39. AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
  40. AC_ARG_ENABLE(asserts-in-tests,
  41. AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
  42. AC_ARG_ENABLE(system-torrc,
  43. AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
  44. AC_ARG_ENABLE(libfuzzer,
  45. AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
  46. AC_ARG_ENABLE(oss-fuzz,
  47. AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
  48. AC_ARG_ENABLE(memory-sentinels,
  49. AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
  50. AC_ARG_ENABLE(rust,
  51. AS_HELP_STRING(--enable-rust, [enable rust integration]))
  52. AC_ARG_ENABLE(cargo-online-mode,
  53. AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
  54. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  55. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  56. fi
  57. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  58. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  59. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  60. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  61. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  62. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  63. if test "$enable_static_tor" = "yes"; then
  64. enable_static_libevent="yes";
  65. enable_static_openssl="yes";
  66. enable_static_zlib="yes";
  67. CFLAGS="$CFLAGS -static"
  68. fi
  69. if test "$enable_system_torrc" = "no"; then
  70. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  71. [Defined if we're not going to look for a torrc in SYSCONF])
  72. fi
  73. if test "$enable_memory_sentinels" = "no"; then
  74. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  75. [Defined if we're turning off memory safety code to look for bugs])
  76. fi
  77. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  78. AC_ARG_ENABLE(asciidoc,
  79. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  80. [case "${enableval}" in
  81. "yes") asciidoc=true ;;
  82. "no") asciidoc=false ;;
  83. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  84. esac], [asciidoc=true])
  85. # systemd notify support
  86. AC_ARG_ENABLE(systemd,
  87. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  88. [case "${enableval}" in
  89. "yes") systemd=true ;;
  90. "no") systemd=false ;;
  91. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  92. esac], [systemd=auto])
  93. # systemd support
  94. if test "x$enable_systemd" = "xno"; then
  95. have_systemd=no;
  96. else
  97. PKG_CHECK_MODULES(SYSTEMD,
  98. [libsystemd-daemon],
  99. have_systemd=yes,
  100. have_systemd=no)
  101. if test "x$have_systemd" = "xno"; then
  102. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  103. PKG_CHECK_MODULES(SYSTEMD,
  104. [libsystemd],
  105. have_systemd=yes,
  106. have_systemd=no)
  107. fi
  108. fi
  109. if test "x$have_systemd" = "xyes"; then
  110. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  111. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  112. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  113. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  114. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  115. fi
  116. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  117. AC_SUBST(TOR_SYSTEMD_LIBS)
  118. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  119. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  120. fi
  121. case "$host" in
  122. *-*-solaris* )
  123. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  124. ;;
  125. esac
  126. AC_ARG_ENABLE(gcc-warnings,
  127. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  128. AC_ARG_ENABLE(fatal-warnings,
  129. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  130. AC_ARG_ENABLE(gcc-warnings-advisory,
  131. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  132. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  133. AC_ARG_ENABLE(gcc-hardening,
  134. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  135. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  136. AC_ARG_ENABLE(expensive-hardening,
  137. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  138. AC_ARG_ENABLE(fragile-hardening,
  139. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  140. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  141. fragile_hardening="yes"
  142. fi
  143. dnl Linker hardening options
  144. dnl Currently these options are ELF specific - you can't use this with MacOSX
  145. AC_ARG_ENABLE(linker-hardening,
  146. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  147. AC_ARG_ENABLE(local-appdata,
  148. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  149. if test "$enable_local_appdata" = "yes"; then
  150. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  151. [Defined if we default to host local appdata paths on Windows])
  152. fi
  153. # Tor2web mode flag
  154. AC_ARG_ENABLE(tor2web-mode,
  155. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  156. [if test "x$enableval" = "xyes"; then
  157. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  158. fi])
  159. AC_ARG_ENABLE(tool-name-check,
  160. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  161. AC_ARG_ENABLE(seccomp,
  162. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  163. AC_ARG_ENABLE(libscrypt,
  164. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  165. dnl Enable event tracing which are transformed to debug log statement.
  166. AC_ARG_ENABLE(event-tracing-debug,
  167. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  168. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  169. if test x$enable_event_tracing_debug = xyes; then
  170. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  171. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  172. fi
  173. dnl check for the correct "ar" when cross-compiling.
  174. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  175. dnl so kludge up a replacement for the case where it isn't there yet.)
  176. m4_ifdef([AM_PROG_AR],
  177. [AM_PROG_AR],
  178. [AN_MAKEVAR([AR], [AC_PROG_AR])
  179. AN_PROGRAM([ar], [AC_PROG_AR])
  180. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  181. AC_PROG_AR])
  182. dnl Check whether the above macro has settled for a simply named tool even
  183. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  184. dnl because that will find any cc on the system, not only the cross-compiler,
  185. dnl and then verify that a binary built with this compiler runs on the
  186. dnl build system. It will then come to the false conclusion that we're not
  187. dnl cross-compiling.
  188. if test "x$enable_tool_name_check" != "xno"; then
  189. if test "x$ac_tool_warned" = "xyes"; then
  190. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  191. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  192. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  193. fi
  194. fi
  195. AC_PROG_CC
  196. AC_PROG_CPP
  197. AC_PROG_MAKE_SET
  198. AC_PROG_RANLIB
  199. AC_PROG_SED
  200. AC_ARG_VAR([PERL], [path to Perl binary])
  201. AC_CHECK_PROGS([PERL], [perl])
  202. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  203. dnl check for asciidoc and a2x
  204. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  205. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  206. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  207. AM_PROG_CC_C_O
  208. AC_PROG_CC_C99
  209. AC_ARG_VAR([PYTHON], [path to Python binary])
  210. AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
  211. if test "x$PYTHON" = "x"; then
  212. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  213. fi
  214. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  215. dnl List all external rust crates we depend on here. Include the version
  216. rust_crates="libc-0.2.22"
  217. AC_SUBST(rust_crates)
  218. 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$NEED_MOD" = "x1"; then
  371. dnl When looking for dependencies from cargo, pick right directory
  372. RUST_DEPENDENCIES="../../src/ext/rust"
  373. fi
  374. fi
  375. dnl This is a workaround for #46797
  376. dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ). Once the
  377. dnl upstream bug is fixed, we can remove this workaround.
  378. case "$host_os" in
  379. darwin*)
  380. TOR_RUST_EXTRA_LIBS="-lresolv"
  381. ;;
  382. esac
  383. dnl For now both MSVC and MinGW rust libraries will output static libs with
  384. dnl the MSVC naming convention.
  385. if test "$bwin32" = "true"; then
  386. TOR_RUST_UTIL_STATIC_NAME=tor_util.lib
  387. else
  388. TOR_RUST_UTIL_STATIC_NAME=libtor_util.a
  389. fi
  390. AC_SUBST(TOR_RUST_UTIL_STATIC_NAME)
  391. AC_SUBST(CARGO_ONLINE)
  392. AC_SUBST(RUST_DL)
  393. dnl Let's check the rustc version, too
  394. AC_MSG_CHECKING([rust version])
  395. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  396. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  397. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  398. AC_MSG_ERROR([rustc version couldn't be identified])
  399. fi
  400. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  401. AC_MSG_ERROR([rustc must be at least version 1.14])
  402. fi
  403. fi
  404. AC_SUBST(TOR_RUST_EXTRA_LIBS)
  405. AC_SEARCH_LIBS(socket, [socket network])
  406. AC_SEARCH_LIBS(gethostbyname, [nsl])
  407. AC_SEARCH_LIBS(dlopen, [dl])
  408. AC_SEARCH_LIBS(inet_aton, [resolv])
  409. AC_SEARCH_LIBS(backtrace, [execinfo])
  410. saved_LIBS="$LIBS"
  411. AC_SEARCH_LIBS([clock_gettime], [rt])
  412. if test "$LIBS" != "$saved_LIBS"; then
  413. # Looks like we need -lrt for clock_gettime().
  414. have_rt=yes
  415. fi
  416. AC_SEARCH_LIBS(pthread_create, [pthread])
  417. AC_SEARCH_LIBS(pthread_detach, [pthread])
  418. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  419. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  420. AC_CHECK_FUNCS(
  421. _NSGetEnviron \
  422. RtlSecureZeroMemory \
  423. SecureZeroMemory \
  424. accept4 \
  425. backtrace \
  426. backtrace_symbols_fd \
  427. eventfd \
  428. explicit_bzero \
  429. timingsafe_memcmp \
  430. flock \
  431. ftime \
  432. get_current_dir_name \
  433. getaddrinfo \
  434. getifaddrs \
  435. getpass \
  436. getrlimit \
  437. gettimeofday \
  438. gmtime_r \
  439. gnu_get_libc_version \
  440. htonll \
  441. inet_aton \
  442. ioctl \
  443. issetugid \
  444. llround \
  445. localtime_r \
  446. lround \
  447. memmem \
  448. memset_s \
  449. pipe \
  450. pipe2 \
  451. prctl \
  452. readpassphrase \
  453. rint \
  454. sigaction \
  455. socketpair \
  456. statvfs \
  457. strlcat \
  458. strlcpy \
  459. strnlen \
  460. strptime \
  461. strtok_r \
  462. strtoull \
  463. sysconf \
  464. sysctl \
  465. truncate \
  466. uname \
  467. usleep \
  468. vasprintf \
  469. _vscprintf
  470. )
  471. # Apple messed up when they added two functions functions in Sierra: they
  472. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  473. # checks. So we should only probe for those functions if we are sure that we
  474. # are not targetting OSX 10.11 or earlier.
  475. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  476. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  477. #ifdef __APPLE__
  478. # include <AvailabilityMacros.h>
  479. # ifndef MAC_OS_X_VERSION_10_12
  480. # define MAC_OS_X_VERSION_10_12 101200
  481. # endif
  482. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  483. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  484. # error "Running on Mac OSX 10.11 or earlier"
  485. # endif
  486. # endif
  487. #endif
  488. ]], [[]])],
  489. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  490. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  491. if test "$on_macos_pre_10_12" = "no"; then
  492. AC_CHECK_FUNCS(
  493. clock_gettime \
  494. getentropy \
  495. )
  496. fi
  497. if test "$bwin32" != "true"; then
  498. AC_CHECK_HEADERS(pthread.h)
  499. AC_CHECK_FUNCS(pthread_create)
  500. AC_CHECK_FUNCS(pthread_condattr_setclock)
  501. fi
  502. if test "$bwin32" = "true"; then
  503. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  504. #include <windows.h>
  505. #include <conio.h>
  506. #include <wchar.h>
  507. ])
  508. fi
  509. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  510. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  511. dnl ------------------------------------------------------
  512. dnl Where do you live, libevent? And how do we call you?
  513. if test "$bwin32" = "true"; then
  514. TOR_LIB_WS32=-lws2_32
  515. TOR_LIB_IPHLPAPI=-liphlpapi
  516. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  517. # think it's actually necessary.
  518. TOR_LIB_GDI=-lgdi32
  519. TOR_LIB_USERENV=-luserenv
  520. else
  521. TOR_LIB_WS32=
  522. TOR_LIB_GDI=
  523. TOR_LIB_USERENV=
  524. fi
  525. AC_SUBST(TOR_LIB_WS32)
  526. AC_SUBST(TOR_LIB_GDI)
  527. AC_SUBST(TOR_LIB_IPHLPAPI)
  528. AC_SUBST(TOR_LIB_USERENV)
  529. tor_libevent_pkg_redhat="libevent"
  530. tor_libevent_pkg_debian="libevent-dev"
  531. tor_libevent_devpkg_redhat="libevent-devel"
  532. tor_libevent_devpkg_debian="libevent-dev"
  533. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  534. dnl linking for static builds.
  535. STATIC_LIBEVENT_FLAGS=""
  536. if test "$enable_static_libevent" = "yes"; then
  537. if test "$have_rt" = "yes"; then
  538. STATIC_LIBEVENT_FLAGS=" -lrt "
  539. fi
  540. fi
  541. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  542. #ifdef _WIN32
  543. #include <winsock2.h>
  544. #endif
  545. #include <sys/time.h>
  546. #include <sys/types.h>
  547. #include <event2/event.h>], [
  548. #ifdef _WIN32
  549. #include <winsock2.h>
  550. #endif
  551. struct event_base;
  552. struct event_base *event_base_new(void);],
  553. [
  554. #ifdef _WIN32
  555. {WSADATA d; WSAStartup(0x101,&d); }
  556. #endif
  557. event_base_free(event_base_new());
  558. ], [--with-libevent-dir], [/opt/libevent])
  559. dnl Determine the incantation needed to link libevent.
  560. save_LIBS="$LIBS"
  561. save_LDFLAGS="$LDFLAGS"
  562. save_CPPFLAGS="$CPPFLAGS"
  563. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  564. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  565. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  566. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  567. if test "$enable_static_libevent" = "yes"; then
  568. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  569. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  570. else
  571. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  572. fi
  573. else
  574. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  575. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  576. 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"))
  577. if test "$ac_cv_search_event_new" != "none required"; then
  578. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  579. fi
  580. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  581. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  582. fi
  583. else
  584. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  585. fi
  586. fi
  587. dnl Now check for particular libevent functions.
  588. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  589. evutil_secure_rng_add_bytes \
  590. ])
  591. LIBS="$save_LIBS"
  592. LDFLAGS="$save_LDFLAGS"
  593. CPPFLAGS="$save_CPPFLAGS"
  594. dnl Check that libevent is at least at version 2.0.10, the first stable
  595. dnl release of its series
  596. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  597. AC_MSG_CHECKING([whether Libevent is new enough])
  598. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  599. #include <event2/event.h>
  600. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  601. #error
  602. int x = y(zz);
  603. #else
  604. int x = 1;
  605. #endif
  606. ])], [ AC_MSG_RESULT([yes]) ],
  607. [ AC_MSG_RESULT([no])
  608. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  609. LIBS="$save_LIBS"
  610. LDFLAGS="$save_LDFLAGS"
  611. CPPFLAGS="$save_CPPFLAGS"
  612. AC_SUBST(TOR_LIBEVENT_LIBS)
  613. dnl ------------------------------------------------------
  614. dnl Where do you live, libm?
  615. dnl On some platforms (Haiku/BeOS) the math library is
  616. dnl part of libroot. In which case don't link against lm
  617. TOR_LIB_MATH=""
  618. save_LIBS="$LIBS"
  619. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  620. if test "$ac_cv_search_pow" != "none required"; then
  621. TOR_LIB_MATH="$ac_cv_search_pow"
  622. fi
  623. LIBS="$save_LIBS"
  624. AC_SUBST(TOR_LIB_MATH)
  625. dnl ------------------------------------------------------
  626. dnl Where do you live, openssl? And how do we call you?
  627. tor_openssl_pkg_redhat="openssl"
  628. tor_openssl_pkg_debian="libssl-dev"
  629. tor_openssl_devpkg_redhat="openssl-devel"
  630. tor_openssl_devpkg_debian="libssl-dev"
  631. ALT_openssl_WITHVAL=""
  632. AC_ARG_WITH(ssl-dir,
  633. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  634. [
  635. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  636. ALT_openssl_WITHVAL="$withval"
  637. fi
  638. ])
  639. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  640. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  641. [#include <openssl/ssl.h>],
  642. [struct ssl_method_st; const struct ssl_method_st *TLSv1_1_method(void);],
  643. [TLSv1_1_method();], [],
  644. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
  645. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  646. if test "$enable_static_openssl" = "yes"; then
  647. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  648. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  649. else
  650. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  651. fi
  652. else
  653. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  654. fi
  655. AC_SUBST(TOR_OPENSSL_LIBS)
  656. dnl Now check for particular openssl functions.
  657. save_LIBS="$LIBS"
  658. save_LDFLAGS="$LDFLAGS"
  659. save_CPPFLAGS="$CPPFLAGS"
  660. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  661. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  662. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  663. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  664. #include <openssl/opensslv.h>
  665. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  666. #error "too old"
  667. #endif
  668. ]], [[]])],
  669. [ : ],
  670. [ 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.]) ])
  671. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  672. #include <openssl/opensslv.h>
  673. #include <openssl/evp.h>
  674. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  675. #error "no ECC"
  676. #endif
  677. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  678. #error "curves unavailable"
  679. #endif
  680. ]], [[]])],
  681. [ : ],
  682. [ 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.]) ])
  683. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  684. [#include <openssl/ssl.h>
  685. ])
  686. AC_CHECK_FUNCS([ \
  687. SSL_SESSION_get_master_key \
  688. SSL_get_server_random \
  689. SSL_get_client_ciphers \
  690. SSL_get_client_random \
  691. SSL_CIPHER_find \
  692. TLS_method
  693. ])
  694. dnl Check if OpenSSL has scrypt implementation.
  695. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  696. dnl Check if OpenSSL structures are opaque
  697. AC_CHECK_MEMBERS([SSL.state], , ,
  698. [#include <openssl/ssl.h>
  699. ])
  700. dnl Define the set of checks for KIST scheduler support.
  701. AC_DEFUN([CHECK_KIST_SUPPORT],[
  702. dnl KIST needs struct tcp_info and for certain members to exist.
  703. AC_CHECK_MEMBERS(
  704. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  705. , ,[[#include <netinet/tcp.h>]])
  706. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  707. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  708. #include <linux/sockios.h>
  709. #ifndef SIOCOUTQNSD
  710. #error
  711. #endif
  712. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  713. if test "x$have_siocoutqnsd" = "xyes"; then
  714. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  715. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  716. have_kist_support=yes
  717. fi
  718. fi
  719. fi
  720. ])
  721. dnl Now, trigger the check.
  722. CHECK_KIST_SUPPORT
  723. AS_IF([test "x$have_kist_support" = "xyes"],
  724. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  725. on this system])],
  726. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  727. LIBS="$save_LIBS"
  728. LDFLAGS="$save_LDFLAGS"
  729. CPPFLAGS="$save_CPPFLAGS"
  730. dnl ------------------------------------------------------
  731. dnl Where do you live, zlib? And how do we call you?
  732. tor_zlib_pkg_redhat="zlib"
  733. tor_zlib_pkg_debian="zlib1g"
  734. tor_zlib_devpkg_redhat="zlib-devel"
  735. tor_zlib_devpkg_debian="zlib1g-dev"
  736. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  737. [#include <zlib.h>],
  738. [const char * zlibVersion(void);],
  739. [zlibVersion();], [--with-zlib-dir],
  740. [/opt/zlib])
  741. if test "$enable_static_zlib" = "yes"; then
  742. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  743. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  744. using --enable-static-zlib")
  745. else
  746. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  747. fi
  748. else
  749. TOR_ZLIB_LIBS="-lz"
  750. fi
  751. AC_SUBST(TOR_ZLIB_LIBS)
  752. dnl ------------------------------------------------------
  753. dnl Where we do we find lzma?
  754. AC_ARG_ENABLE(lzma,
  755. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  756. [case "${enableval}" in
  757. "yes") lzma=true ;;
  758. "no") lzma=false ;;
  759. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  760. esac], [lzma=auto])
  761. if test "x$enable_lzma" = "xno"; then
  762. have_lzma=no;
  763. else
  764. PKG_CHECK_MODULES([LZMA],
  765. [liblzma],
  766. have_lzma=yes,
  767. have_lzma=no)
  768. if test "x$have_lzma" = "xno" ; then
  769. AC_MSG_WARN([Unable to find liblzma.])
  770. fi
  771. fi
  772. if test "x$have_lzma" = "xyes"; then
  773. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  774. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  775. TOR_LZMA_LIBS="${LZMA_LIBS}"
  776. fi
  777. AC_SUBST(TOR_LZMA_CFLAGS)
  778. AC_SUBST(TOR_LZMA_LIBS)
  779. dnl ------------------------------------------------------
  780. dnl Where we do we find zstd?
  781. AC_ARG_ENABLE(zstd,
  782. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  783. [case "${enableval}" in
  784. "yes") zstd=true ;;
  785. "no") zstd=false ;;
  786. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  787. esac], [zstd=auto])
  788. if test "x$enable_zstd" = "xno"; then
  789. have_zstd=no;
  790. else
  791. PKG_CHECK_MODULES([ZSTD],
  792. [libzstd >= 1.1],
  793. have_zstd=yes,
  794. have_zstd=no)
  795. if test "x$have_zstd" = "xno" ; then
  796. AC_MSG_WARN([Unable to find libzstd.])
  797. fi
  798. fi
  799. if test "x$have_zstd" = "xyes"; then
  800. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  801. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  802. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  803. fi
  804. AC_SUBST(TOR_ZSTD_CFLAGS)
  805. AC_SUBST(TOR_ZSTD_LIBS)
  806. dnl ----------------------------------------------------------------------
  807. dnl Check if libcap is available for capabilities.
  808. tor_cap_pkg_debian="libcap2"
  809. tor_cap_pkg_redhat="libcap"
  810. tor_cap_devpkg_debian="libcap-dev"
  811. tor_cap_devpkg_redhat="libcap-devel"
  812. AC_CHECK_LIB([cap], [cap_init], [],
  813. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  814. )
  815. AC_CHECK_FUNCS(cap_set_proc)
  816. dnl ---------------------------------------------------------------------
  817. dnl Now that we know about our major libraries, we can check for compiler
  818. dnl and linker hardening options. We need to do this with the libraries known,
  819. dnl since sometimes the linker will like an option but not be willing to
  820. dnl use it with a build of a library.
  821. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  822. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  823. CFLAGS_FTRAPV=
  824. CFLAGS_FWRAPV=
  825. CFLAGS_ASAN=
  826. CFLAGS_UBSAN=
  827. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  828. #if !defined(__clang__)
  829. #error
  830. #endif])], have_clang=yes, have_clang=no)
  831. if test "x$enable_gcc_hardening" != "xno"; then
  832. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  833. if test "x$have_clang" = "xyes"; then
  834. TOR_CHECK_CFLAGS(-Qunused-arguments)
  835. fi
  836. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  837. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  838. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  839. m4_ifdef([AS_VAR_IF],[
  840. AS_VAR_IF(can_compile, [yes],
  841. AS_VAR_IF(can_link, [yes],
  842. [],
  843. 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.)]))
  844. )])
  845. AS_VAR_POPDEF([can_link])
  846. AS_VAR_POPDEF([can_compile])
  847. TOR_CHECK_CFLAGS(-Wstack-protector)
  848. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  849. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  850. TOR_CHECK_CFLAGS(-fPIE)
  851. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  852. fi
  853. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  854. fi
  855. if test "$fragile_hardening" = "yes"; then
  856. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  857. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  858. 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.])
  859. fi
  860. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  861. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  862. fi
  863. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  864. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  865. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
  866. fi
  867. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  868. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  869. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
  870. fi
  871. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  872. fi
  873. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  874. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  875. mulodi_fixes_ftrapv=no
  876. if test "$have_clang" = "yes"; then
  877. saved_CFLAGS="$CFLAGS"
  878. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  879. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  880. AC_LINK_IFELSE([
  881. AC_LANG_SOURCE([[
  882. #include <stdint.h>
  883. #include <stdlib.h>
  884. int main(int argc, char **argv)
  885. {
  886. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  887. * (int64_t)atoi(argv[3]);
  888. return x == 9;
  889. } ]])],
  890. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  891. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  892. if test "$ftrapv_can_link" = "no"; then
  893. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  894. AC_LINK_IFELSE([
  895. AC_LANG_SOURCE([[
  896. #include <stdint.h>
  897. #include <stdlib.h>
  898. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  899. *overflow=0;
  900. return a;
  901. }
  902. int main(int argc, char **argv)
  903. {
  904. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  905. * (int64_t)atoi(argv[3]);
  906. return x == 9;
  907. } ]])],
  908. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  909. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  910. fi
  911. CFLAGS="$saved_CFLAGS"
  912. fi
  913. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  914. dnl These cflags add bunches of branches, and we haven't been able to
  915. dnl persuade ourselves that they're suitable for code that needs to be
  916. dnl constant time.
  917. AC_SUBST(CFLAGS_BUGTRAP)
  918. dnl These cflags are variant ones sutable for code that needs to be
  919. dnl constant-time.
  920. AC_SUBST(CFLAGS_CONSTTIME)
  921. if test "x$enable_linker_hardening" != "xno"; then
  922. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  923. fi
  924. # For backtrace support
  925. TOR_CHECK_LDFLAGS(-rdynamic)
  926. dnl ------------------------------------------------------
  927. dnl Now see if we have a -fomit-frame-pointer compiler option.
  928. saved_CFLAGS="$CFLAGS"
  929. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  930. F_OMIT_FRAME_POINTER=''
  931. if test "$saved_CFLAGS" != "$CFLAGS"; then
  932. if test "$fragile_hardening" = "yes"; then
  933. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  934. fi
  935. fi
  936. CFLAGS="$saved_CFLAGS"
  937. AC_SUBST(F_OMIT_FRAME_POINTER)
  938. dnl ------------------------------------------------------
  939. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  940. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  941. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  942. dnl code will work.
  943. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  944. dnl ============================================================
  945. dnl Check for libseccomp
  946. if test "x$enable_seccomp" != "xno"; then
  947. AC_CHECK_HEADERS([seccomp.h])
  948. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  949. fi
  950. dnl ============================================================
  951. dnl Check for libscrypt
  952. if test "x$enable_libscrypt" != "xno"; then
  953. AC_CHECK_HEADERS([libscrypt.h])
  954. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  955. AC_CHECK_FUNCS([libscrypt_scrypt])
  956. fi
  957. dnl ============================================================
  958. dnl We need an implementation of curve25519.
  959. dnl set these defaults.
  960. build_curve25519_donna=no
  961. build_curve25519_donna_c64=no
  962. use_curve25519_donna=no
  963. use_curve25519_nacl=no
  964. CURVE25519_LIBS=
  965. dnl The best choice is using curve25519-donna-c64, but that requires
  966. dnl that we
  967. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  968. tor_cv_can_use_curve25519_donna_c64,
  969. [AC_RUN_IFELSE(
  970. [AC_LANG_PROGRAM([dnl
  971. #include <stdint.h>
  972. typedef unsigned uint128_t __attribute__((mode(TI)));
  973. int func(uint64_t a, uint64_t b) {
  974. uint128_t c = ((uint128_t)a) * b;
  975. int ok = ((uint64_t)(c>>96)) == 522859 &&
  976. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  977. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  978. (((uint64_t)(c))&0xffffffffL) == 0;
  979. return ok;
  980. }
  981. ], [dnl
  982. int ok = func( ((uint64_t)2000000000) * 1000000000,
  983. ((uint64_t)1234567890) << 24);
  984. return !ok;
  985. ])],
  986. [tor_cv_can_use_curve25519_donna_c64=yes],
  987. [tor_cv_can_use_curve25519_donna_c64=no],
  988. [AC_LINK_IFELSE(
  989. [AC_LANG_PROGRAM([dnl
  990. #include <stdint.h>
  991. typedef unsigned uint128_t __attribute__((mode(TI)));
  992. int func(uint64_t a, uint64_t b) {
  993. uint128_t c = ((uint128_t)a) * b;
  994. int ok = ((uint64_t)(c>>96)) == 522859 &&
  995. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  996. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  997. (((uint64_t)(c))&0xffffffffL) == 0;
  998. return ok;
  999. }
  1000. ], [dnl
  1001. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1002. ((uint64_t)1234567890) << 24);
  1003. return !ok;
  1004. ])],
  1005. [tor_cv_can_use_curve25519_donna_c64=cross],
  1006. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1007. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1008. nacl/crypto_scalarmult_curve25519.h])
  1009. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1010. tor_cv_can_use_curve25519_nacl,
  1011. [tor_saved_LIBS="$LIBS"
  1012. LIBS="$LIBS -lnacl"
  1013. AC_LINK_IFELSE(
  1014. [AC_LANG_PROGRAM([dnl
  1015. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1016. #include <crypto_scalarmult_curve25519.h>
  1017. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1018. #include <nacl/crypto_scalarmult_curve25519.h>
  1019. #endif
  1020. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1021. #error Hey, this is the reference implementation! That's not fast.
  1022. #endif
  1023. ], [
  1024. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1025. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1026. [tor_cv_can_use_curve25519_nacl=no])
  1027. LIBS="$tor_saved_LIBS" ])
  1028. dnl Okay, now we need to figure out which one to actually use. Fall back
  1029. dnl to curve25519-donna.c
  1030. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1031. build_curve25519_donna_c64=yes
  1032. use_curve25519_donna=yes
  1033. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1034. use_curve25519_nacl=yes
  1035. CURVE25519_LIBS=-lnacl
  1036. else
  1037. build_curve25519_donna=yes
  1038. use_curve25519_donna=yes
  1039. fi
  1040. if test "x$use_curve25519_donna" = "xyes"; then
  1041. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1042. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1043. fi
  1044. if test "x$use_curve25519_nacl" = "xyes"; then
  1045. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1046. [Defined if we should use a curve25519 from nacl])
  1047. fi
  1048. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1049. test "x$build_curve25519_donna" = "xyes")
  1050. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1051. test "x$build_curve25519_donna_c64" = "xyes")
  1052. AC_SUBST(CURVE25519_LIBS)
  1053. dnl Make sure to enable support for large off_t if available.
  1054. AC_SYS_LARGEFILE
  1055. AC_CHECK_HEADERS([assert.h \
  1056. errno.h \
  1057. fcntl.h \
  1058. signal.h \
  1059. string.h \
  1060. sys/capability.h \
  1061. sys/fcntl.h \
  1062. sys/stat.h \
  1063. sys/time.h \
  1064. sys/types.h \
  1065. time.h \
  1066. unistd.h \
  1067. arpa/inet.h \
  1068. crt_externs.h \
  1069. execinfo.h \
  1070. gnu/libc-version.h \
  1071. grp.h \
  1072. ifaddrs.h \
  1073. inttypes.h \
  1074. limits.h \
  1075. linux/types.h \
  1076. machine/limits.h \
  1077. malloc.h \
  1078. malloc/malloc.h \
  1079. malloc_np.h \
  1080. netdb.h \
  1081. netinet/in.h \
  1082. netinet/in6.h \
  1083. pwd.h \
  1084. readpassphrase.h \
  1085. stdint.h \
  1086. sys/eventfd.h \
  1087. sys/file.h \
  1088. sys/ioctl.h \
  1089. sys/limits.h \
  1090. sys/mman.h \
  1091. sys/param.h \
  1092. sys/prctl.h \
  1093. sys/random.h \
  1094. sys/resource.h \
  1095. sys/select.h \
  1096. sys/socket.h \
  1097. sys/statvfs.h \
  1098. sys/syscall.h \
  1099. sys/sysctl.h \
  1100. sys/syslimits.h \
  1101. sys/time.h \
  1102. sys/types.h \
  1103. sys/un.h \
  1104. sys/utime.h \
  1105. sys/wait.h \
  1106. syslog.h \
  1107. utime.h])
  1108. AC_CHECK_HEADERS(sys/param.h)
  1109. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1110. [#ifdef HAVE_SYS_TYPES_H
  1111. #include <sys/types.h>
  1112. #endif
  1113. #ifdef HAVE_SYS_SOCKET_H
  1114. #include <sys/socket.h>
  1115. #endif])
  1116. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1117. [#ifdef HAVE_SYS_TYPES_H
  1118. #include <sys/types.h>
  1119. #endif
  1120. #ifdef HAVE_SYS_SOCKET_H
  1121. #include <sys/socket.h>
  1122. #endif
  1123. #ifdef HAVE_NET_IF_H
  1124. #include <net/if.h>
  1125. #endif
  1126. #ifdef HAVE_NETINET_IN_H
  1127. #include <netinet/in.h>
  1128. #endif])
  1129. AC_CHECK_HEADERS(linux/if.h,[],[],
  1130. [
  1131. #ifdef HAVE_SYS_SOCKET_H
  1132. #include <sys/socket.h>
  1133. #endif
  1134. ])
  1135. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1136. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1137. [#ifdef HAVE_SYS_TYPES_H
  1138. #include <sys/types.h>
  1139. #endif
  1140. #ifdef HAVE_SYS_SOCKET_H
  1141. #include <sys/socket.h>
  1142. #endif
  1143. #ifdef HAVE_LIMITS_H
  1144. #include <limits.h>
  1145. #endif
  1146. #ifdef HAVE_LINUX_TYPES_H
  1147. #include <linux/types.h>
  1148. #endif
  1149. #ifdef HAVE_NETINET_IN6_H
  1150. #include <netinet/in6.h>
  1151. #endif
  1152. #ifdef HAVE_NETINET_IN_H
  1153. #include <netinet/in.h>
  1154. #endif])
  1155. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1156. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1157. [#ifdef HAVE_SYS_TYPES_H
  1158. #include <sys/types.h>
  1159. #endif
  1160. #ifdef HAVE_SYS_SOCKET_H
  1161. #include <sys/socket.h>
  1162. #endif
  1163. #ifdef HAVE_LIMITS_H
  1164. #include <limits.h>
  1165. #endif
  1166. #ifdef HAVE_LINUX_TYPES_H
  1167. #include <linux/types.h>
  1168. #endif
  1169. #ifdef HAVE_NETINET_IN6_H
  1170. #include <netinet/in6.h>
  1171. #endif
  1172. #ifdef HAVE_NETINET_IN_H
  1173. #include <netinet/in.h>
  1174. #endif
  1175. #ifdef HAVE_LINUX_IF_H
  1176. #include <linux/if.h>
  1177. #endif])
  1178. transparent_ok=0
  1179. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1180. transparent_ok=1
  1181. fi
  1182. if test "x$linux_netfilter_ipv4" = "x1"; then
  1183. transparent_ok=1
  1184. fi
  1185. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1186. transparent_ok=1
  1187. fi
  1188. if test "x$transparent_ok" = "x1"; then
  1189. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1190. else
  1191. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1192. fi
  1193. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1194. [#ifdef HAVE_SYS_TYPES_H
  1195. #include <sys/types.h>
  1196. #endif
  1197. #ifdef HAVE_SYS_TIME_H
  1198. #include <sys/time.h>
  1199. #endif])
  1200. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1201. dnl Watch out.
  1202. AC_CHECK_SIZEOF(int8_t)
  1203. AC_CHECK_SIZEOF(int16_t)
  1204. AC_CHECK_SIZEOF(int32_t)
  1205. AC_CHECK_SIZEOF(int64_t)
  1206. AC_CHECK_SIZEOF(uint8_t)
  1207. AC_CHECK_SIZEOF(uint16_t)
  1208. AC_CHECK_SIZEOF(uint32_t)
  1209. AC_CHECK_SIZEOF(uint64_t)
  1210. AC_CHECK_SIZEOF(intptr_t)
  1211. AC_CHECK_SIZEOF(uintptr_t)
  1212. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1213. AC_CHECK_SIZEOF(char)
  1214. AC_CHECK_SIZEOF(short)
  1215. AC_CHECK_SIZEOF(int)
  1216. AC_CHECK_SIZEOF(long)
  1217. AC_CHECK_SIZEOF(long long)
  1218. AC_CHECK_SIZEOF(__int64)
  1219. AC_CHECK_SIZEOF(void *)
  1220. AC_CHECK_SIZEOF(time_t)
  1221. AC_CHECK_SIZEOF(size_t)
  1222. AC_CHECK_SIZEOF(pid_t)
  1223. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1224. AC_PC_FROM_UCONTEXT([:])
  1225. dnl used to include sockaddr_storage, but everybody has that.
  1226. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1227. [#ifdef HAVE_SYS_TYPES_H
  1228. #include <sys/types.h>
  1229. #endif
  1230. #ifdef HAVE_NETINET_IN_H
  1231. #include <netinet/in.h>
  1232. #endif
  1233. #ifdef HAVE_NETINET_IN6_H
  1234. #include <netinet/in6.h>
  1235. #endif
  1236. #ifdef HAVE_SYS_SOCKET_H
  1237. #include <sys/socket.h>
  1238. #endif
  1239. #ifdef _WIN32
  1240. #define _WIN32_WINNT 0x0501
  1241. #define WIN32_LEAN_AND_MEAN
  1242. #include <winsock2.h>
  1243. #include <ws2tcpip.h>
  1244. #endif
  1245. ])
  1246. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1247. [#ifdef HAVE_SYS_TYPES_H
  1248. #include <sys/types.h>
  1249. #endif
  1250. #ifdef HAVE_NETINET_IN_H
  1251. #include <netinet/in.h>
  1252. #endif
  1253. #ifdef HAVE_NETINET_IN6_H
  1254. #include <netinet/in6.h>
  1255. #endif
  1256. #ifdef HAVE_SYS_SOCKET_H
  1257. #include <sys/socket.h>
  1258. #endif
  1259. #ifdef _WIN32
  1260. #define _WIN32_WINNT 0x0501
  1261. #define WIN32_LEAN_AND_MEAN
  1262. #include <winsock2.h>
  1263. #include <ws2tcpip.h>
  1264. #endif
  1265. ])
  1266. AC_CHECK_TYPES([rlim_t], , ,
  1267. [#ifdef HAVE_SYS_TYPES_H
  1268. #include <sys/types.h>
  1269. #endif
  1270. #ifdef HAVE_SYS_TIME_H
  1271. #include <sys/time.h>
  1272. #endif
  1273. #ifdef HAVE_SYS_RESOURCE_H
  1274. #include <sys/resource.h>
  1275. #endif
  1276. ])
  1277. AX_CHECK_SIGN([time_t],
  1278. [ : ],
  1279. [ : ], [
  1280. #ifdef HAVE_SYS_TYPES_H
  1281. #include <sys/types.h>
  1282. #endif
  1283. #ifdef HAVE_SYS_TIME_H
  1284. #include <sys/time.h>
  1285. #endif
  1286. #ifdef HAVE_TIME_H
  1287. #include <time.h>
  1288. #endif
  1289. ])
  1290. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1291. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1292. fi
  1293. AX_CHECK_SIGN([size_t],
  1294. [ tor_cv_size_t_signed=yes ],
  1295. [ tor_cv_size_t_signed=no ], [
  1296. #ifdef HAVE_SYS_TYPES_H
  1297. #include <sys/types.h>
  1298. #endif
  1299. ])
  1300. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1301. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1302. fi
  1303. AX_CHECK_SIGN([enum always],
  1304. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1305. [ : ], [
  1306. enum always { AAA, BBB, CCC };
  1307. ])
  1308. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1309. #ifdef HAVE_SYS_SOCKET_H
  1310. #include <sys/socket.h>
  1311. #endif
  1312. ])
  1313. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1314. AC_CHECK_SIZEOF(cell_t)
  1315. # Now make sure that NULL can be represented as zero bytes.
  1316. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1317. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1318. [[#include <stdlib.h>
  1319. #include <string.h>
  1320. #include <stdio.h>
  1321. #ifdef HAVE_STDDEF_H
  1322. #include <stddef.h>
  1323. #endif
  1324. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1325. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1326. [tor_cv_null_is_zero=yes],
  1327. [tor_cv_null_is_zero=no],
  1328. [tor_cv_null_is_zero=cross])])
  1329. if test "$tor_cv_null_is_zero" = "cross"; then
  1330. # Cross-compiling; let's hope that the target isn't raving mad.
  1331. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1332. fi
  1333. if test "$tor_cv_null_is_zero" != "no"; then
  1334. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1335. [Define to 1 iff memset(0) sets pointers to NULL])
  1336. fi
  1337. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1338. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1339. [[#include <stdlib.h>
  1340. #include <string.h>
  1341. #include <stdio.h>
  1342. #ifdef HAVE_STDDEF_H
  1343. #include <stddef.h>
  1344. #endif
  1345. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1346. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1347. [tor_cv_dbl0_is_zero=yes],
  1348. [tor_cv_dbl0_is_zero=no],
  1349. [tor_cv_dbl0_is_zero=cross])])
  1350. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1351. # Cross-compiling; let's hope that the target isn't raving mad.
  1352. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1353. fi
  1354. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1355. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1356. [Define to 1 iff memset(0) sets doubles to 0.0])
  1357. fi
  1358. # And what happens when we malloc zero?
  1359. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1360. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1361. [[#include <stdlib.h>
  1362. #include <string.h>
  1363. #include <stdio.h>
  1364. #ifdef HAVE_STDDEF_H
  1365. #include <stddef.h>
  1366. #endif
  1367. int main () { return malloc(0)?0:1; }]])],
  1368. [tor_cv_malloc_zero_works=yes],
  1369. [tor_cv_malloc_zero_works=no],
  1370. [tor_cv_malloc_zero_works=cross])])
  1371. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1372. # Cross-compiling; let's hope that the target isn't raving mad.
  1373. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1374. fi
  1375. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1376. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1377. [Define to 1 iff malloc(0) returns a pointer])
  1378. fi
  1379. # whether we seem to be in a 2s-complement world.
  1380. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1381. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1382. [[int main () { int problem = ((-99) != (~99)+1);
  1383. return problem ? 1 : 0; }]])],
  1384. [tor_cv_twos_complement=yes],
  1385. [tor_cv_twos_complement=no],
  1386. [tor_cv_twos_complement=cross])])
  1387. if test "$tor_cv_twos_complement" = "cross"; then
  1388. # Cross-compiling; let's hope that the target isn't raving mad.
  1389. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1390. fi
  1391. if test "$tor_cv_twos_complement" != "no"; then
  1392. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1393. [Define to 1 iff we represent negative integers with
  1394. two's complement])
  1395. fi
  1396. # What does shifting a negative value do?
  1397. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1398. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1399. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1400. [tor_cv_sign_extend=yes],
  1401. [tor_cv_sign_extend=no],
  1402. [tor_cv_sign_extend=cross])])
  1403. if test "$tor_cv_sign_extend" = "cross"; then
  1404. # Cross-compiling; let's hope that the target isn't raving mad.
  1405. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1406. fi
  1407. if test "$tor_cv_sign_extend" != "no"; then
  1408. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1409. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1410. fi
  1411. # Is uint8_t the same type as unsigned char?
  1412. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1413. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1414. #include <stdint.h>
  1415. extern uint8_t c;
  1416. unsigned char c;]])],
  1417. [tor_cv_uint8_uchar=yes],
  1418. [tor_cv_uint8_uchar=no],
  1419. [tor_cv_uint8_uchar=cross])])
  1420. if test "$tor_cv_uint8_uchar" = "cross"; then
  1421. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1422. fi
  1423. if test "$tor_cv_uint8_uchar" = "no"; then
  1424. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1425. fi
  1426. # Whether we should use the dmalloc memory allocation debugging library.
  1427. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1428. AC_ARG_WITH(dmalloc,
  1429. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1430. [if [[ "$withval" = "yes" ]]; then
  1431. dmalloc=1
  1432. AC_MSG_RESULT(yes)
  1433. else
  1434. dmalloc=1
  1435. AC_MSG_RESULT(no)
  1436. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1437. )
  1438. if [[ $dmalloc -eq 1 ]]; then
  1439. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1440. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1441. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1442. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1443. fi
  1444. AC_ARG_WITH(tcmalloc,
  1445. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1446. [ tcmalloc=yes ], [ tcmalloc=no ])
  1447. if test "x$tcmalloc" = "xyes"; then
  1448. LDFLAGS="-ltcmalloc $LDFLAGS"
  1449. fi
  1450. using_custom_malloc=no
  1451. if test "x$enable_openbsd_malloc" = "xyes"; then
  1452. using_custom_malloc=yes
  1453. fi
  1454. if test "x$tcmalloc" = "xyes"; then
  1455. using_custom_malloc=yes
  1456. fi
  1457. if test "$using_custom_malloc" = "no"; then
  1458. AC_CHECK_FUNCS(mallinfo)
  1459. fi
  1460. # By default, we're going to assume we don't have mlockall()
  1461. # bionic and other platforms have various broken mlockall subsystems.
  1462. # Some systems don't have a working mlockall, some aren't linkable,
  1463. # and some have it but don't declare it.
  1464. AC_CHECK_FUNCS(mlockall)
  1465. AC_CHECK_DECLS([mlockall], , , [
  1466. #ifdef HAVE_SYS_MMAN_H
  1467. #include <sys/mman.h>
  1468. #endif])
  1469. # Some MinGW environments don't have getpagesize in unistd.h. We don't use
  1470. # AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
  1471. # using macros
  1472. AC_CHECK_DECLS([getpagesize], , , [
  1473. #ifdef HAVE_UNISTD_H
  1474. #include <unistd.h>
  1475. #endif])
  1476. # Allow user to specify an alternate syslog facility
  1477. AC_ARG_WITH(syslog-facility,
  1478. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1479. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1480. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1481. AC_SUBST(LOGFACILITY)
  1482. # Check if we have getresuid and getresgid
  1483. AC_CHECK_FUNCS(getresuid getresgid)
  1484. # Check for gethostbyname_r in all its glorious incompatible versions.
  1485. # (This logic is based on that in Python's configure.in)
  1486. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1487. [Define this if you have any gethostbyname_r()])
  1488. AC_CHECK_FUNC(gethostbyname_r, [
  1489. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1490. OLD_CFLAGS=$CFLAGS
  1491. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1492. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1493. #include <netdb.h>
  1494. ]], [[
  1495. char *cp1, *cp2;
  1496. struct hostent *h1, *h2;
  1497. int i1, i2;
  1498. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1499. ]])],[
  1500. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1501. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1502. [Define this if gethostbyname_r takes 6 arguments])
  1503. AC_MSG_RESULT(6)
  1504. ], [
  1505. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1506. #include <netdb.h>
  1507. ]], [[
  1508. char *cp1, *cp2;
  1509. struct hostent *h1;
  1510. int i1, i2;
  1511. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1512. ]])], [
  1513. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1514. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1515. [Define this if gethostbyname_r takes 5 arguments])
  1516. AC_MSG_RESULT(5)
  1517. ], [
  1518. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1519. #include <netdb.h>
  1520. ]], [[
  1521. char *cp1;
  1522. struct hostent *h1;
  1523. struct hostent_data hd;
  1524. (void) gethostbyname_r(cp1,h1,&hd);
  1525. ]])], [
  1526. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1527. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1528. [Define this if gethostbyname_r takes 3 arguments])
  1529. AC_MSG_RESULT(3)
  1530. ], [
  1531. AC_MSG_RESULT(0)
  1532. ])
  1533. ])
  1534. ])
  1535. CFLAGS=$OLD_CFLAGS
  1536. ])
  1537. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1538. tor_cv_have_func_macro,
  1539. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1540. #include <stdio.h>
  1541. int main(int c, char **v) { puts(__func__); }])],
  1542. tor_cv_have_func_macro=yes,
  1543. tor_cv_have_func_macro=no))
  1544. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1545. tor_cv_have_FUNC_macro,
  1546. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1547. #include <stdio.h>
  1548. int main(int c, char **v) { puts(__FUNC__); }])],
  1549. tor_cv_have_FUNC_macro=yes,
  1550. tor_cv_have_FUNC_macro=no))
  1551. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1552. tor_cv_have_FUNCTION_macro,
  1553. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1554. #include <stdio.h>
  1555. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1556. tor_cv_have_FUNCTION_macro=yes,
  1557. tor_cv_have_FUNCTION_macro=no))
  1558. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1559. tor_cv_have_environ_declared,
  1560. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1561. #ifdef HAVE_UNISTD_H
  1562. #include <unistd.h>
  1563. #endif
  1564. #include <stdlib.h>
  1565. int main(int c, char **v) { char **t = environ; }])],
  1566. tor_cv_have_environ_declared=yes,
  1567. tor_cv_have_environ_declared=no))
  1568. if test "$tor_cv_have_func_macro" = "yes"; then
  1569. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1570. fi
  1571. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1572. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1573. fi
  1574. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1575. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1576. [Defined if the compiler supports __FUNCTION__])
  1577. fi
  1578. if test "$tor_cv_have_environ_declared" = "yes"; then
  1579. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1580. [Defined if we have extern char **environ already declared])
  1581. fi
  1582. # $prefix stores the value of the --prefix command line option, or
  1583. # NONE if the option wasn't set. In the case that it wasn't set, make
  1584. # it be the default, so that we can use it to expand directories now.
  1585. if test "x$prefix" = "xNONE"; then
  1586. prefix=$ac_default_prefix
  1587. fi
  1588. # and similarly for $exec_prefix
  1589. if test "x$exec_prefix" = "xNONE"; then
  1590. exec_prefix=$prefix
  1591. fi
  1592. if test "x$BUILDDIR" = "x"; then
  1593. BUILDDIR=`pwd`
  1594. fi
  1595. AC_SUBST(BUILDDIR)
  1596. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1597. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1598. if test "x$CONFDIR" = "x"; then
  1599. CONFDIR=`eval echo $sysconfdir/tor`
  1600. fi
  1601. AC_SUBST(CONFDIR)
  1602. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1603. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1604. BINDIR=`eval echo $bindir`
  1605. AC_SUBST(BINDIR)
  1606. LOCALSTATEDIR=`eval echo $localstatedir`
  1607. AC_SUBST(LOCALSTATEDIR)
  1608. if test "$bwin32" = "true"; then
  1609. # Test if the linker supports the --nxcompat and --dynamicbase options
  1610. # for Windows
  1611. save_LDFLAGS="$LDFLAGS"
  1612. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1613. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1614. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1615. [AC_MSG_RESULT([yes])]
  1616. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1617. [AC_MSG_RESULT([no])]
  1618. )
  1619. LDFLAGS="$save_LDFLAGS"
  1620. fi
  1621. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1622. # than autoconf's macros like.
  1623. if test "$GCC" = "yes"; then
  1624. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1625. # accident waiting to happen.
  1626. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1627. else
  1628. # Override optimization level for non-gcc compilers
  1629. CFLAGS="$CFLAGS -O"
  1630. enable_gcc_warnings=no
  1631. enable_gcc_warnings_advisory=no
  1632. fi
  1633. # Warnings implies advisory-warnings and -Werror.
  1634. if test "$enable_gcc_warnings" = "yes"; then
  1635. enable_gcc_warnings_advisory=yes
  1636. enable_fatal_warnings=yes
  1637. fi
  1638. # OS X Lion started deprecating the system openssl. Let's just disable
  1639. # all deprecation warnings on OS X. Also, to potentially make the binary
  1640. # a little smaller, let's enable dead_strip.
  1641. case "$host_os" in
  1642. darwin*)
  1643. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1644. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1645. esac
  1646. # Add some more warnings which we use in development but not in the
  1647. # released versions. (Some relevant gcc versions can't handle these.)
  1648. #
  1649. # Note that we have to do this near the end of the autoconf process, or
  1650. # else we may run into problems when these warnings hit on the testing C
  1651. # programs that autoconf wants to build.
  1652. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1653. case "$host" in
  1654. *-*-openbsd* | *-*-bitrig*)
  1655. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1656. # That's fine, except that the headers don't pass -Wredundant-decls.
  1657. # Therefore, let's disable -Wsystem-headers when we're building
  1658. # with maximal warnings on OpenBSD.
  1659. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1660. esac
  1661. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1662. # have it work better.
  1663. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1664. # This warning was added in gcc 4.3, but it appears to generate
  1665. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1666. #CFLAGS="$CFLAGS -Wlogical-op"
  1667. m4_foreach_w([warning_flag], [
  1668. -Waddress
  1669. -Waddress-of-array-temporary
  1670. -Waddress-of-temporary
  1671. -Wambiguous-macro
  1672. -Wanonymous-pack-parens
  1673. -Warc
  1674. -Warc-abi
  1675. -Warc-bridge-casts-disallowed-in-nonarc
  1676. -Warc-maybe-repeated-use-of-weak
  1677. -Warc-performSelector-leaks
  1678. -Warc-repeated-use-of-weak
  1679. -Warray-bounds
  1680. -Warray-bounds-pointer-arithmetic
  1681. -Wasm
  1682. -Wasm-operand-widths
  1683. -Watomic-properties
  1684. -Watomic-property-with-user-defined-accessor
  1685. -Wauto-import
  1686. -Wauto-storage-class
  1687. -Wauto-var-id
  1688. -Wavailability
  1689. -Wbackslash-newline-escape
  1690. -Wbad-array-new-length
  1691. -Wbind-to-temporary-copy
  1692. -Wbitfield-constant-conversion
  1693. -Wbool-conversion
  1694. -Wbool-conversions
  1695. -Wbuiltin-requires-header
  1696. -Wchar-align
  1697. -Wcompare-distinct-pointer-types
  1698. -Wcomplex-component-init
  1699. -Wconditional-type-mismatch
  1700. -Wconfig-macros
  1701. -Wconstant-conversion
  1702. -Wconstant-logical-operand
  1703. -Wconstexpr-not-const
  1704. -Wcustom-atomic-properties
  1705. -Wdangling-field
  1706. -Wdangling-initializer-list
  1707. -Wdate-time
  1708. -Wdelegating-ctor-cycles
  1709. -Wdeprecated-implementations
  1710. -Wdeprecated-register
  1711. -Wdirect-ivar-access
  1712. -Wdiscard-qual
  1713. -Wdistributed-object-modifiers
  1714. -Wdivision-by-zero
  1715. -Wdollar-in-identifier-extension
  1716. -Wdouble-promotion
  1717. -Wduplicate-decl-specifier
  1718. -Wduplicate-enum
  1719. -Wduplicate-method-arg
  1720. -Wduplicate-method-match
  1721. -Wduplicated-cond
  1722. -Wdynamic-class-memaccess
  1723. -Wembedded-directive
  1724. -Wempty-translation-unit
  1725. -Wenum-conversion
  1726. -Wexit-time-destructors
  1727. -Wexplicit-ownership-type
  1728. -Wextern-initializer
  1729. -Wextra
  1730. -Wextra-semi
  1731. -Wextra-tokens
  1732. -Wflexible-array-extensions
  1733. -Wfloat-conversion
  1734. -Wformat-non-iso
  1735. -Wfour-char-constants
  1736. -Wgcc-compat
  1737. -Wglobal-constructors
  1738. -Wgnu-array-member-paren-init
  1739. -Wgnu-designator
  1740. -Wgnu-static-float-init
  1741. -Wheader-guard
  1742. -Wheader-hygiene
  1743. -Widiomatic-parentheses
  1744. -Wignored-attributes
  1745. -Wimplicit-atomic-properties
  1746. -Wimplicit-conversion-floating-point-to-bool
  1747. -Wimplicit-exception-spec-mismatch
  1748. -Wimplicit-fallthrough
  1749. -Wimplicit-fallthrough-per-function
  1750. -Wimplicit-retain-self
  1751. -Wimport-preprocessor-directive-pedantic
  1752. -Wincompatible-library-redeclaration
  1753. -Wincompatible-pointer-types-discards-qualifiers
  1754. -Wincomplete-implementation
  1755. -Wincomplete-module
  1756. -Wincomplete-umbrella
  1757. -Winit-self
  1758. -Wint-conversions
  1759. -Wint-to-void-pointer-cast
  1760. -Winteger-overflow
  1761. -Winvalid-constexpr
  1762. -Winvalid-iboutlet
  1763. -Winvalid-noreturn
  1764. -Winvalid-pp-token
  1765. -Winvalid-source-encoding
  1766. -Winvalid-token-paste
  1767. -Wknr-promoted-parameter
  1768. -Wlanguage-extension-token
  1769. -Wlarge-by-value-copy
  1770. -Wliteral-conversion
  1771. -Wliteral-range
  1772. -Wlocal-type-template-args
  1773. -Wlogical-op
  1774. -Wloop-analysis
  1775. -Wmain-return-type
  1776. -Wmalformed-warning-check
  1777. -Wmethod-signatures
  1778. -Wmicrosoft
  1779. -Wmicrosoft-exists
  1780. -Wmismatched-parameter-types
  1781. -Wmismatched-return-types
  1782. -Wmissing-field-initializers
  1783. -Wmissing-format-attribute
  1784. -Wmissing-noreturn
  1785. -Wmissing-selector-name
  1786. -Wmissing-sysroot
  1787. -Wmissing-variable-declarations
  1788. -Wmodule-conflict
  1789. -Wnested-anon-types
  1790. -Wnewline-eof
  1791. -Wnon-literal-null-conversion
  1792. -Wnon-pod-varargs
  1793. -Wnonportable-cfstrings
  1794. -Wnormalized=id
  1795. -Wnull-arithmetic
  1796. -Wnull-character
  1797. -Wnull-conversion
  1798. -Wnull-dereference
  1799. -Wout-of-line-declaration
  1800. -Wover-aligned
  1801. -Woverlength-strings
  1802. -Woverride-init
  1803. -Woverriding-method-mismatch
  1804. -Wpointer-type-mismatch
  1805. -Wpredefined-identifier-outside-function
  1806. -Wprotocol-property-synthesis-ambiguity
  1807. -Wreadonly-iboutlet-property
  1808. -Wreadonly-setter-attrs
  1809. -Wreceiver-expr
  1810. -Wreceiver-forward-class
  1811. -Wreceiver-is-weak
  1812. -Wreinterpret-base-class
  1813. -Wrequires-super-attribute
  1814. -Wreserved-user-defined-literal
  1815. -Wreturn-stack-address
  1816. -Wsection
  1817. -Wselector-type-mismatch
  1818. -Wsentinel
  1819. -Wserialized-diagnostics
  1820. -Wshadow
  1821. -Wshift-count-negative
  1822. -Wshift-count-overflow
  1823. -Wshift-negative-value
  1824. -Wshift-overflow=2
  1825. -Wshift-sign-overflow
  1826. -Wshorten-64-to-32
  1827. -Wsizeof-array-argument
  1828. -Wsource-uses-openmp
  1829. -Wstatic-float-init
  1830. -Wstatic-in-inline
  1831. -Wstatic-local-in-inline
  1832. -Wstrict-overflow=1
  1833. -Wstring-compare
  1834. -Wstring-conversion
  1835. -Wstrlcpy-strlcat-size
  1836. -Wstrncat-size
  1837. -Wsuggest-attribute=format
  1838. -Wsuggest-attribute=noreturn
  1839. -Wsuper-class-method-mismatch
  1840. -Wswitch-bool
  1841. -Wsync-nand
  1842. -Wtautological-constant-out-of-range-compare
  1843. -Wtentative-definition-incomplete-type
  1844. -Wtrampolines
  1845. -Wtype-safety
  1846. -Wtypedef-redefinition
  1847. -Wtypename-missing
  1848. -Wundefined-inline
  1849. -Wundefined-internal
  1850. -Wundefined-reinterpret-cast
  1851. -Wunicode
  1852. -Wunicode-whitespace
  1853. -Wunknown-warning-option
  1854. -Wunnamed-type-template-args
  1855. -Wunneeded-member-function
  1856. -Wunsequenced
  1857. -Wunsupported-visibility
  1858. -Wunused-but-set-parameter
  1859. -Wunused-but-set-variable
  1860. -Wunused-command-line-argument
  1861. -Wunused-const-variable=2
  1862. -Wunused-exception-parameter
  1863. -Wunused-local-typedefs
  1864. -Wunused-member-function
  1865. -Wunused-sanitize-argument
  1866. -Wunused-volatile-lvalue
  1867. -Wuser-defined-literals
  1868. -Wvariadic-macros
  1869. -Wvector-conversion
  1870. -Wvector-conversions
  1871. -Wvexing-parse
  1872. -Wvisibility
  1873. -Wvla-extension
  1874. -Wzero-length-array
  1875. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  1876. dnl We should re-enable this in some later version. Clang doesn't
  1877. dnl mind, but it causes trouble with GCC.
  1878. dnl -Wstrict-overflow=2
  1879. dnl These seem to require annotations that we don't currently use,
  1880. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  1881. dnl -Wthread-safety
  1882. dnl -Wthread-safety-analysis
  1883. dnl -Wthread-safety-attributes
  1884. dnl -Wthread-safety-beta
  1885. dnl -Wthread-safety-precise
  1886. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  1887. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  1888. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  1889. CFLAGS="$CFLAGS -Wwrite-strings"
  1890. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  1891. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  1892. CFLAGS="$CFLAGS -Wunused-parameter "
  1893. # These interfere with building main() { return 0; }, which autoconf
  1894. # likes to use as its default program.
  1895. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  1896. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  1897. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  1898. fi
  1899. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  1900. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  1901. fi
  1902. if test "x$enable_fatal_warnings" = "xyes"; then
  1903. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  1904. # default autoconf programs are full of errors.
  1905. CFLAGS="$CFLAGS -Werror"
  1906. fi
  1907. fi
  1908. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  1909. case "$host_os" in
  1910. darwin*)
  1911. AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
  1912. esac
  1913. fi
  1914. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  1915. AC_CONFIG_FILES([
  1916. Doxyfile
  1917. Makefile
  1918. contrib/dist/suse/tor.sh
  1919. contrib/operator-tools/tor.logrotate
  1920. contrib/dist/tor.sh
  1921. contrib/dist/torctl
  1922. contrib/dist/tor.service
  1923. src/config/torrc.sample
  1924. src/config/torrc.minimal
  1925. src/rust/.cargo/config
  1926. scripts/maint/checkOptionDocs.pl
  1927. scripts/maint/updateVersions.pl
  1928. ])
  1929. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  1930. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  1931. for file in $regular_mans ; do
  1932. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  1933. echo "==================================";
  1934. echo;
  1935. echo "Building Tor has failed since manpages cannot be built.";
  1936. echo;
  1937. echo "You need asciidoc installed to be able to build the manpages.";
  1938. echo "To build without manpages, use the --disable-asciidoc argument";
  1939. echo "when calling configure.";
  1940. echo;
  1941. echo "==================================";
  1942. exit 1;
  1943. fi
  1944. done
  1945. fi
  1946. if test "$fragile_hardening" = "yes"; then
  1947. AC_MSG_WARN([
  1948. ============
  1949. Warning! Building Tor with --enable-fragile-hardening (also known as
  1950. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  1951. other kinds of attacks easier. A Tor instance build with this option will be
  1952. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  1953. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  1954. denial of service attacks. For more information, see
  1955. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  1956. ============
  1957. ])
  1958. fi
  1959. AC_OUTPUT