configure.ac 77 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152215231524152515261527152815291530153115321533153415351536153715381539154015411542154315441545154615471548154915501551155215531554155515561557155815591560156115621563156415651566156715681569157015711572157315741575157615771578157915801581158215831584158515861587158815891590159115921593159415951596159715981599160016011602160316041605160616071608160916101611161216131614161516161617161816191620162116221623162416251626162716281629163016311632163316341635163616371638163916401641164216431644164516461647164816491650165116521653165416551656165716581659166016611662166316641665166616671668166916701671167216731674167516761677167816791680168116821683168416851686168716881689169016911692169316941695169616971698169917001701170217031704170517061707170817091710171117121713171417151716171717181719172017211722172317241725172617271728172917301731173217331734173517361737173817391740174117421743174417451746174717481749175017511752175317541755175617571758175917601761176217631764176517661767176817691770177117721773177417751776177717781779178017811782178317841785178617871788178917901791179217931794179517961797179817991800180118021803180418051806180718081809181018111812181318141815181618171818181918201821182218231824182518261827182818291830183118321833183418351836183718381839184018411842184318441845184618471848184918501851185218531854185518561857185818591860186118621863186418651866186718681869187018711872187318741875187618771878187918801881188218831884188518861887188818891890189118921893189418951896189718981899190019011902190319041905190619071908190919101911191219131914191519161917191819191920192119221923192419251926192719281929193019311932193319341935193619371938193919401941194219431944194519461947194819491950195119521953195419551956195719581959196019611962196319641965196619671968196919701971197219731974197519761977197819791980198119821983198419851986198719881989199019911992199319941995199619971998199920002001200220032004200520062007200820092010201120122013201420152016201720182019202020212022202320242025202620272028202920302031203220332034203520362037203820392040204120422043204420452046204720482049205020512052205320542055205620572058205920602061206220632064206520662067206820692070207120722073207420752076207720782079208020812082208320842085208620872088208920902091209220932094209520962097209820992100210121022103210421052106210721082109211021112112211321142115211621172118211921202121212221232124212521262127212821292130213121322133213421352136213721382139214021412142214321442145214621472148214921502151215221532154215521562157215821592160216121622163216421652166216721682169217021712172217321742175217621772178217921802181218221832184218521862187218821892190219121922193219421952196219721982199220022012202220322042205220622072208220922102211221222132214221522162217221822192220222122222223222422252226222722282229223022312232223322342235223622372238223922402241224222432244224522462247224822492250225122522253225422552256225722582259226022612262226322642265226622672268226922702271227222732274227522762277227822792280228122822283228422852286228722882289229022912292229322942295229622972298229923002301230223032304230523062307230823092310231123122313231423152316231723182319232023212322232323242325232623272328232923302331233223332334233523362337233823392340234123422343234423452346234723482349235023512352235323542355235623572358235923602361236223632364236523662367236823692370237123722373237423752376237723782379238023812382238323842385238623872388238923902391239223932394239523962397239823992400240124022403240424052406240724082409241024112412241324142415241624172418241924202421242224232424
  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],[0.3.4.11-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. AC_ARG_ENABLE(restart-debugging,
  55. AS_HELP_STRING(--enable-restart-debugging, [Build Tor with support for debugging in-process restart. Developers only.]))
  56. AC_ARG_ENABLE(zstd-advanced-apis,
  57. AS_HELP_STRING(--disable-zstd-advanced-apis, [Build without support for zstd's "static-only" APIs.]))
  58. if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
  59. AC_MSG_ERROR([Can't disable assertions outside of coverage build])
  60. fi
  61. AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
  62. AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
  63. AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
  64. AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
  65. AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
  66. AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
  67. if test "$enable_static_tor" = "yes"; then
  68. enable_static_libevent="yes";
  69. enable_static_openssl="yes";
  70. enable_static_zlib="yes";
  71. CFLAGS="$CFLAGS -static"
  72. fi
  73. if test "$enable_system_torrc" = "no"; then
  74. AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
  75. [Defined if we're not going to look for a torrc in SYSCONF])
  76. fi
  77. if test "$enable_memory_sentinels" = "no"; then
  78. AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
  79. [Defined if we're turning off memory safety code to look for bugs])
  80. fi
  81. AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
  82. AC_ARG_ENABLE(asciidoc,
  83. AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
  84. [case "${enableval}" in
  85. "yes") asciidoc=true ;;
  86. "no") asciidoc=false ;;
  87. *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
  88. esac], [asciidoc=true])
  89. # systemd notify support
  90. AC_ARG_ENABLE(systemd,
  91. AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
  92. [case "${enableval}" in
  93. "yes") systemd=true ;;
  94. "no") systemd=false ;;
  95. * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
  96. esac], [systemd=auto])
  97. if test "$enable_restart_debugging" = "yes"; then
  98. AC_DEFINE(ENABLE_RESTART_DEBUGGING, 1,
  99. [Defined if we're building with support for in-process restart debugging.])
  100. fi
  101. if test "$enable_zstd_advanced_apis" != "no"; then
  102. AC_DEFINE(ENABLE_ZSTD_ADVANCED_APIS, 1,
  103. [Defined if we're going to try to use zstd's "static-only" APIs.])
  104. fi
  105. # systemd support
  106. if test "x$enable_systemd" = "xno"; then
  107. have_systemd=no;
  108. else
  109. PKG_CHECK_MODULES(SYSTEMD,
  110. [libsystemd-daemon],
  111. have_systemd=yes,
  112. have_systemd=no)
  113. if test "x$have_systemd" = "xno"; then
  114. AC_MSG_NOTICE([Okay, checking for systemd a different way...])
  115. PKG_CHECK_MODULES(SYSTEMD,
  116. [libsystemd],
  117. have_systemd=yes,
  118. have_systemd=no)
  119. fi
  120. fi
  121. if test "x$have_systemd" = "xyes"; then
  122. AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
  123. TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
  124. TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
  125. PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
  126. [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
  127. fi
  128. AC_SUBST(TOR_SYSTEMD_CFLAGS)
  129. AC_SUBST(TOR_SYSTEMD_LIBS)
  130. if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
  131. AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
  132. fi
  133. case "$host" in
  134. *-*-solaris* )
  135. AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
  136. ;;
  137. esac
  138. AC_ARG_ENABLE(gcc-warnings,
  139. AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
  140. AC_ARG_ENABLE(fatal-warnings,
  141. AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
  142. AC_ARG_ENABLE(gcc-warnings-advisory,
  143. AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
  144. dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
  145. AC_ARG_ENABLE(gcc-hardening,
  146. AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
  147. dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
  148. AC_ARG_ENABLE(expensive-hardening,
  149. AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  150. AC_ARG_ENABLE(fragile-hardening,
  151. AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
  152. if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
  153. fragile_hardening="yes"
  154. AC_DEFINE(DEBUG_SMARTLIST, 1, [Enable smartlist debugging])
  155. fi
  156. dnl Linker hardening options
  157. dnl Currently these options are ELF specific - you can't use this with MacOSX
  158. AC_ARG_ENABLE(linker-hardening,
  159. AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
  160. AC_ARG_ENABLE(local-appdata,
  161. AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
  162. if test "$enable_local_appdata" = "yes"; then
  163. AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
  164. [Defined if we default to host local appdata paths on Windows])
  165. fi
  166. # Tor2web mode flag
  167. AC_ARG_ENABLE(tor2web-mode,
  168. AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
  169. [if test "x$enableval" = "xyes"; then
  170. CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
  171. fi])
  172. AC_ARG_ENABLE(tool-name-check,
  173. AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
  174. AC_ARG_ENABLE(seccomp,
  175. AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
  176. AC_ARG_ENABLE(libscrypt,
  177. AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
  178. dnl Enable event tracing which are transformed to debug log statement.
  179. AC_ARG_ENABLE(event-tracing-debug,
  180. AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
  181. AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
  182. if test x$enable_event_tracing_debug = xyes; then
  183. AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
  184. AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
  185. fi
  186. dnl Enable Android only features.
  187. AC_ARG_ENABLE(android,
  188. AS_HELP_STRING(--enable-android, [build with Android features enabled]))
  189. AM_CONDITIONAL([USE_ANDROID], [test "x$enable_android" = "xyes"])
  190. if test "x$enable_android" = "xyes"; then
  191. AC_DEFINE([USE_ANDROID], [1], [Compile with Android specific features enabled])
  192. dnl Check if the Android log library is available.
  193. AC_CHECK_HEADERS([android/log.h])
  194. AC_SEARCH_LIBS(__android_log_write, [log])
  195. fi
  196. dnl ---
  197. dnl Tor modules options. These options are namespaced with --disable-module-XXX
  198. dnl ---
  199. dnl All our modules.
  200. m4_define(MODULES, dirauth)
  201. dnl Directory Authority module.
  202. AC_ARG_ENABLE([module-dirauth],
  203. AS_HELP_STRING([--disable-module-dirauth],
  204. [Do not build tor with the dirauth module]),
  205. [], dnl Action if-given
  206. AC_DEFINE([HAVE_MODULE_DIRAUTH], [1],
  207. [Compile with Directory Authority feature support]))
  208. AM_CONDITIONAL(BUILD_MODULE_DIRAUTH, [test "x$enable_module_dirauth" != "xno"])
  209. dnl Helper variables.
  210. TOR_MODULES_ALL_ENABLED=
  211. AC_DEFUN([ADD_MODULE], [
  212. MODULE=m4_toupper($1)
  213. TOR_MODULES_ALL_ENABLED="${TOR_MODULES_ALL_ENABLED} -DHAVE_MODULE_${MODULE}=1"
  214. ])
  215. m4_foreach_w([module], MODULES, [ADD_MODULE([module])])
  216. AC_SUBST(TOR_MODULES_ALL_ENABLED)
  217. dnl check for the correct "ar" when cross-compiling.
  218. dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
  219. dnl so kludge up a replacement for the case where it isn't there yet.)
  220. m4_ifdef([AM_PROG_AR],
  221. [AM_PROG_AR],
  222. [AN_MAKEVAR([AR], [AC_PROG_AR])
  223. AN_PROGRAM([ar], [AC_PROG_AR])
  224. AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
  225. AC_PROG_AR])
  226. dnl Check whether the above macro has settled for a simply named tool even
  227. dnl though we're cross compiling. We must do this before running AC_PROG_CC,
  228. dnl because that will find any cc on the system, not only the cross-compiler,
  229. dnl and then verify that a binary built with this compiler runs on the
  230. dnl build system. It will then come to the false conclusion that we're not
  231. dnl cross-compiling.
  232. if test "x$enable_tool_name_check" != "xno"; then
  233. if test "x$ac_tool_warned" = "xyes"; then
  234. AC_MSG_ERROR([We are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  235. elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
  236. AC_MSG_ERROR([We think we are cross compiling but could not find a properly named toolchain. Do you have your cross-compiling toolchain in PATH? (You can --disable-tool-name-check to ignore this.)])
  237. fi
  238. fi
  239. AC_PROG_CC
  240. AC_PROG_CPP
  241. AC_PROG_MAKE_SET
  242. AC_PROG_RANLIB
  243. AC_PROG_SED
  244. AC_ARG_VAR([PERL], [path to Perl binary])
  245. AC_CHECK_PROGS([PERL], [perl])
  246. AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
  247. dnl check for asciidoc and a2x
  248. AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
  249. AC_PATH_PROGS([A2X], [a2x a2x.py], none)
  250. AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
  251. AM_PROG_CC_C_O
  252. AC_PROG_CC_C99
  253. AC_ARG_VAR([PYTHON], [path to Python binary])
  254. AC_CHECK_PROGS(PYTHON, [ \
  255. python3 \
  256. python3.8 python3.7 python3.6 python3.5 python3.4 \
  257. python \
  258. python2 python2.7])
  259. if test "x$PYTHON" = "x"; then
  260. AC_MSG_WARN([Python unavailable; some tests will not be run.])
  261. fi
  262. AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])
  263. dnl List all external rust crates we depend on here. Include the version
  264. rust_crates=" \
  265. digest-0.7.2 \
  266. libc-0.2.39 \
  267. "
  268. AC_SUBST(rust_crates)
  269. ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
  270. AC_C_FLEXIBLE_ARRAY_MEMBER
  271. ], [
  272. dnl Maybe we've got an old autoconf...
  273. AC_CACHE_CHECK([for flexible array members],
  274. tor_cv_c_flexarray,
  275. [AC_COMPILE_IFELSE(
  276. AC_LANG_PROGRAM([
  277. struct abc { int a; char b[]; };
  278. ], [
  279. struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
  280. def->b[0] = 33;
  281. ]),
  282. [tor_cv_c_flexarray=yes],
  283. [tor_cv_c_flexarray=no])])
  284. if test "$tor_cv_flexarray" = "yes"; then
  285. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  286. else
  287. AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
  288. fi
  289. ])
  290. AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
  291. tor_cv_c_c99_decl,
  292. [AC_COMPILE_IFELSE(
  293. [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
  294. [tor_cv_c_c99_decl=yes],
  295. [tor_cv_c_c99_decl=no] )])
  296. if test "$tor_cv_c_c99_decl" != "yes"; then
  297. AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
  298. fi
  299. AC_CACHE_CHECK([for working C99 designated initializers],
  300. tor_cv_c_c99_designated_init,
  301. [AC_COMPILE_IFELSE(
  302. [AC_LANG_PROGRAM([struct s { int a; int b; };],
  303. [[ struct s ss = { .b = 5, .a = 6 }; ]])],
  304. [tor_cv_c_c99_designated_init=yes],
  305. [tor_cv_c_c99_designated_init=no] )])
  306. if test "$tor_cv_c_c99_designated_init" != "yes"; then
  307. AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
  308. fi
  309. TORUSER=_tor
  310. AC_ARG_WITH(tor-user,
  311. AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
  312. [
  313. TORUSER=$withval
  314. ]
  315. )
  316. AC_SUBST(TORUSER)
  317. TORGROUP=_tor
  318. AC_ARG_WITH(tor-group,
  319. AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
  320. [
  321. TORGROUP=$withval
  322. ]
  323. )
  324. AC_SUBST(TORGROUP)
  325. dnl If _WIN32 is defined and non-zero, we are building for win32
  326. AC_MSG_CHECKING([for win32])
  327. AC_RUN_IFELSE([AC_LANG_SOURCE([
  328. int main(int c, char **v) {
  329. #ifdef _WIN32
  330. #if _WIN32
  331. return 0;
  332. #else
  333. return 1;
  334. #endif
  335. #else
  336. return 2;
  337. #endif
  338. }])],
  339. bwin32=true; AC_MSG_RESULT([yes]),
  340. bwin32=false; AC_MSG_RESULT([no]),
  341. bwin32=cross; AC_MSG_RESULT([cross])
  342. )
  343. if test "$bwin32" = "cross"; then
  344. AC_MSG_CHECKING([for win32 (cross)])
  345. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  346. #ifdef _WIN32
  347. int main(int c, char **v) {return 0;}
  348. #else
  349. #error
  350. int main(int c, char **v) {return x(y);}
  351. #endif
  352. ])],
  353. bwin32=true; AC_MSG_RESULT([yes]),
  354. bwin32=false; AC_MSG_RESULT([no]))
  355. fi
  356. AH_BOTTOM([
  357. #ifdef _WIN32
  358. /* Defined to access windows functions and definitions for >=WinXP */
  359. # ifndef WINVER
  360. # define WINVER 0x0501
  361. # endif
  362. /* Defined to access _other_ windows functions and definitions for >=WinXP */
  363. # ifndef _WIN32_WINNT
  364. # define _WIN32_WINNT 0x0501
  365. # endif
  366. /* Defined to avoid including some windows headers as part of Windows.h */
  367. # ifndef WIN32_LEAN_AND_MEAN
  368. # define WIN32_LEAN_AND_MEAN 1
  369. # endif
  370. #endif
  371. ])
  372. AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
  373. AM_CONDITIONAL(BUILD_LIBTORRUNNER, test "x$bwin32" != "xtrue")
  374. dnl Enable C99 when compiling with MIPSpro
  375. AC_MSG_CHECKING([for MIPSpro compiler])
  376. AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
  377. #if (defined(__sgi) && defined(_COMPILER_VERSION))
  378. #error
  379. return x(y);
  380. #endif
  381. ])],
  382. bmipspro=false; AC_MSG_RESULT(no),
  383. bmipspro=true; AC_MSG_RESULT(yes))
  384. if test "$bmipspro" = "true"; then
  385. CFLAGS="$CFLAGS -c99"
  386. fi
  387. AC_C_BIGENDIAN
  388. AC_ARG_VAR([TOR_RUST_TARGET], [Rust target, must be specified when cross-compiling (HOST != BUILD). example: i686-pc-windows-gnu])
  389. if test "x$enable_rust" = "xyes"; then
  390. AC_ARG_VAR([RUSTC], [path to the rustc binary])
  391. AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
  392. if test "x$RUSTC" = "xno"; then
  393. AC_MSG_ERROR([rustc unavailable but rust integration requested.])
  394. fi
  395. AC_ARG_VAR([CARGO], [path to the cargo binary])
  396. AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
  397. if test "x$CARGO" = "xno"; then
  398. AC_MSG_ERROR([cargo unavailable but rust integration requested.])
  399. fi
  400. AC_DEFINE([HAVE_RUST], 1, [have Rust])
  401. if test "x$enable_fatal_warnings" = "xyes"; then
  402. RUST_WARN=
  403. else
  404. RUST_WARN=#
  405. fi
  406. if test "x$enable_cargo_online_mode" = "xyes"; then
  407. CARGO_ONLINE=
  408. RUST_DL=#
  409. else
  410. CARGO_ONLINE=--frozen
  411. RUST_DL=
  412. dnl When we're not allowed to touch the network, we need crate dependencies
  413. dnl locally available.
  414. AC_MSG_CHECKING([rust crate dependencies])
  415. AC_ARG_VAR([TOR_RUST_DEPENDENCIES], [path to directory with local crate mirror])
  416. if test "x$TOR_RUST_DEPENDENCIES" = "x"; then
  417. TOR_RUST_DEPENDENCIES="${srcdir}/src/ext/rust/crates"
  418. fi
  419. dnl Check whether the path exists before we try to cd into it.
  420. if test ! -d "$TOR_RUST_DEPENDENCIES"; then
  421. AC_MSG_ERROR([Rust dependency directory $TOR_RUST_DEPENDENCIES does not exist. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  422. ERRORED=1
  423. fi
  424. dnl Make the path absolute, since we'll be using it from within a
  425. dnl subdirectory.
  426. TOR_RUST_DEPENDENCIES=$(cd "$TOR_RUST_DEPENDENCIES" ; pwd)
  427. for dep in $rust_crates; do
  428. if test ! -d "$TOR_RUST_DEPENDENCIES"/"$dep"; then
  429. AC_MSG_ERROR([Failure to find rust dependency $TOR_RUST_DEPENDENCIES/$dep. Specify a dependency directory using the TOR_RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
  430. ERRORED=1
  431. fi
  432. done
  433. if test "x$ERRORED" = "x"; then
  434. AC_MSG_RESULT([yes])
  435. fi
  436. fi
  437. dnl This is a workaround for #46797
  438. dnl (a.k.a https://github.com/rust-lang/rust/issues/46797 ). Once the
  439. dnl upstream bug is fixed, we can remove this workaround.
  440. case "$host_os" in
  441. darwin*)
  442. TOR_RUST_EXTRA_LIBS="-lresolv"
  443. ;;
  444. esac
  445. dnl For now both MSVC and MinGW rust libraries will output static libs with
  446. dnl the MSVC naming convention.
  447. if test "$bwin32" = "true"; then
  448. tor_rust_static_name=tor_rust.lib
  449. else
  450. tor_rust_static_name=libtor_rust.a
  451. fi
  452. AC_CANONICAL_BUILD
  453. if test -n "$TOR_RUST_TARGET"; then
  454. if test "$host" = "$build"; then
  455. AC_MSG_ERROR([HOST = BUILD is invalid if TOR_RUST_TARGET is specified, see configure --help for more information.])
  456. fi
  457. RUST_TARGET_PROP="target = '$TOR_RUST_TARGET'"
  458. TOR_RUST_LIB_PATH="src/rust/target/$TOR_RUST_TARGET/release/$tor_rust_static_name"
  459. else
  460. if test "$host" != "$build"; then
  461. AC_MSG_ERROR([TOR_RUST_TARGET must be specified when cross-compiling with Rust enabled.])
  462. fi
  463. RUST_TARGET_PROP=
  464. TOR_RUST_LIB_PATH="src/rust/target/release/$tor_rust_static_name"
  465. fi
  466. AC_SUBST(RUST_TARGET_PROP)
  467. AC_SUBST(TOR_RUST_LIB_PATH)
  468. AC_SUBST(CARGO_ONLINE)
  469. AC_SUBST(RUST_WARN)
  470. AC_SUBST(RUST_DL)
  471. dnl Let's check the rustc version, too
  472. AC_MSG_CHECKING([rust version])
  473. RUSTC_VERSION=`$RUSTC --version`
  474. RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
  475. RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
  476. if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
  477. AC_MSG_ERROR([rustc version couldn't be identified])
  478. fi
  479. if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
  480. AC_MSG_ERROR([rustc must be at least version 1.14])
  481. fi
  482. AC_MSG_RESULT([$RUSTC_VERSION])
  483. fi
  484. AC_SUBST(TOR_RUST_EXTRA_LIBS)
  485. AC_SEARCH_LIBS(socket, [socket network])
  486. AC_SEARCH_LIBS(gethostbyname, [nsl])
  487. AC_SEARCH_LIBS(dlopen, [dl])
  488. AC_SEARCH_LIBS(inet_aton, [resolv])
  489. AC_SEARCH_LIBS(backtrace, [execinfo])
  490. saved_LIBS="$LIBS"
  491. AC_SEARCH_LIBS([clock_gettime], [rt])
  492. if test "$LIBS" != "$saved_LIBS"; then
  493. # Looks like we need -lrt for clock_gettime().
  494. have_rt=yes
  495. fi
  496. if test "$bwin32" = "false"; then
  497. AC_SEARCH_LIBS(pthread_create, [pthread])
  498. AC_SEARCH_LIBS(pthread_detach, [pthread])
  499. fi
  500. AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
  501. AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
  502. AC_CHECK_FUNCS(
  503. _NSGetEnviron \
  504. RtlSecureZeroMemory \
  505. SecureZeroMemory \
  506. accept4 \
  507. backtrace \
  508. backtrace_symbols_fd \
  509. eventfd \
  510. explicit_bzero \
  511. timingsafe_memcmp \
  512. flock \
  513. ftime \
  514. get_current_dir_name \
  515. getaddrinfo \
  516. getifaddrs \
  517. getpass \
  518. getrlimit \
  519. gettimeofday \
  520. gmtime_r \
  521. gnu_get_libc_version \
  522. htonll \
  523. inet_aton \
  524. ioctl \
  525. issetugid \
  526. llround \
  527. localtime_r \
  528. lround \
  529. memmem \
  530. memset_s \
  531. mmap \
  532. pipe \
  533. pipe2 \
  534. prctl \
  535. readpassphrase \
  536. rint \
  537. sigaction \
  538. socketpair \
  539. statvfs \
  540. strlcat \
  541. strlcpy \
  542. strnlen \
  543. strptime \
  544. strtok_r \
  545. strtoull \
  546. sysconf \
  547. sysctl \
  548. truncate \
  549. uname \
  550. usleep \
  551. vasprintf \
  552. _vscprintf
  553. )
  554. # Apple messed up when they added some functions: they
  555. # forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
  556. # checks.
  557. # We should only probe for these functions if we are sure that we
  558. # are not targeting OS X 10.9 or earlier.
  559. AC_MSG_CHECKING([for a pre-Yosemite OS X build target])
  560. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  561. #ifdef __APPLE__
  562. # include <AvailabilityMacros.h>
  563. # ifndef MAC_OS_X_VERSION_10_10
  564. # define MAC_OS_X_VERSION_10_10 101000
  565. # endif
  566. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  567. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10
  568. # error "Running on Mac OS X 10.9 or earlier"
  569. # endif
  570. # endif
  571. #endif
  572. ]], [[]])],
  573. [on_macos_pre_10_10=no ; AC_MSG_RESULT([no])],
  574. [on_macos_pre_10_10=yes; AC_MSG_RESULT([yes])])
  575. if test "$on_macos_pre_10_10" = "no"; then
  576. AC_CHECK_FUNCS(
  577. mach_approximate_time \
  578. )
  579. fi
  580. # We should only probe for these functions if we are sure that we
  581. # are not targeting OSX 10.11 or earlier.
  582. AC_MSG_CHECKING([for a pre-Sierra OSX build target])
  583. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  584. #ifdef __APPLE__
  585. # include <AvailabilityMacros.h>
  586. # ifndef MAC_OS_X_VERSION_10_12
  587. # define MAC_OS_X_VERSION_10_12 101200
  588. # endif
  589. # if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
  590. # if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
  591. # error "Running on Mac OSX 10.11 or earlier"
  592. # endif
  593. # endif
  594. #endif
  595. ]], [[]])],
  596. [on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
  597. [on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
  598. if test "$on_macos_pre_10_12" = "no"; then
  599. AC_CHECK_FUNCS(
  600. clock_gettime \
  601. getentropy \
  602. )
  603. fi
  604. if test "$bwin32" != "true"; then
  605. AC_CHECK_HEADERS(pthread.h)
  606. AC_CHECK_FUNCS(pthread_create)
  607. AC_CHECK_FUNCS(pthread_condattr_setclock)
  608. fi
  609. if test "$bwin32" = "true"; then
  610. AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
  611. #include <windows.h>
  612. #include <conio.h>
  613. #include <wchar.h>
  614. ])
  615. fi
  616. AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  617. test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
  618. AC_MSG_CHECKING([whether free(NULL) works])
  619. AC_RUN_IFELSE([AC_LANG_PROGRAM([
  620. #include <stdlib.h>
  621. ], [
  622. char *p = NULL;
  623. free(p);
  624. ])],
  625. [free_null_ok=true; AC_MSG_RESULT(yes)],
  626. [free_null_ok=false; AC_MSG_RESULT(no)],
  627. [free_null_ok=cross; AC_MSG_RESULT(cross)])
  628. if test "$free_null_ok" = "false"; then
  629. AC_MSG_ERROR([Your libc implementation doesn't allow free(NULL), as required by C99.])
  630. fi
  631. dnl ------------------------------------------------------
  632. dnl Where do you live, libevent? And how do we call you?
  633. if test "$bwin32" = "true"; then
  634. TOR_LIB_WS32=-lws2_32
  635. TOR_LIB_IPHLPAPI=-liphlpapi
  636. # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  637. # think it's actually necessary.
  638. TOR_LIB_GDI=-lgdi32
  639. TOR_LIB_USERENV=-luserenv
  640. else
  641. TOR_LIB_WS32=
  642. TOR_LIB_GDI=
  643. TOR_LIB_USERENV=
  644. fi
  645. AC_SUBST(TOR_LIB_WS32)
  646. AC_SUBST(TOR_LIB_GDI)
  647. AC_SUBST(TOR_LIB_IPHLPAPI)
  648. AC_SUBST(TOR_LIB_USERENV)
  649. tor_libevent_pkg_redhat="libevent"
  650. tor_libevent_pkg_debian="libevent-dev"
  651. tor_libevent_devpkg_redhat="libevent-devel"
  652. tor_libevent_devpkg_debian="libevent-dev"
  653. dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
  654. dnl linking for static builds.
  655. STATIC_LIBEVENT_FLAGS=""
  656. if test "$enable_static_libevent" = "yes"; then
  657. if test "$have_rt" = "yes"; then
  658. STATIC_LIBEVENT_FLAGS=" -lrt "
  659. fi
  660. fi
  661. TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
  662. #ifdef _WIN32
  663. #include <winsock2.h>
  664. #endif
  665. #include <sys/time.h>
  666. #include <sys/types.h>
  667. #include <event2/event.h>], [
  668. #ifdef _WIN32
  669. #include <winsock2.h>
  670. #endif
  671. struct event_base;
  672. struct event_base *event_base_new(void);
  673. void event_base_free(struct event_base *);],
  674. [
  675. #ifdef _WIN32
  676. {WSADATA d; WSAStartup(0x101,&d); }
  677. #endif
  678. event_base_free(event_base_new());
  679. ], [--with-libevent-dir], [/opt/libevent])
  680. dnl Determine the incantation needed to link libevent.
  681. save_LIBS="$LIBS"
  682. save_LDFLAGS="$LDFLAGS"
  683. save_CPPFLAGS="$CPPFLAGS"
  684. LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
  685. LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
  686. CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
  687. AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
  688. if test "$enable_static_libevent" = "yes"; then
  689. if test "$tor_cv_library_libevent_dir" = "(system)"; then
  690. AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
  691. else
  692. TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
  693. fi
  694. else
  695. if test "x$ac_cv_header_event2_event_h" = "xyes"; then
  696. AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
  697. 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"))
  698. if test "$ac_cv_search_event_new" != "none required"; then
  699. TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
  700. fi
  701. if test "$ac_cv_search_evdns_base_new" != "none required"; then
  702. TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
  703. fi
  704. else
  705. AC_MSG_ERROR("libevent2 is required but the headers could not be found")
  706. fi
  707. fi
  708. dnl Now check for particular libevent functions.
  709. AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
  710. evutil_secure_rng_add_bytes \
  711. ])
  712. LIBS="$save_LIBS"
  713. LDFLAGS="$save_LDFLAGS"
  714. CPPFLAGS="$save_CPPFLAGS"
  715. dnl Check that libevent is at least at version 2.0.10, the first stable
  716. dnl release of its series
  717. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
  718. AC_MSG_CHECKING([whether Libevent is new enough])
  719. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  720. #include <event2/event.h>
  721. #if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
  722. #error
  723. int x = y(zz);
  724. #else
  725. int x = 1;
  726. #endif
  727. ])], [ AC_MSG_RESULT([yes]) ],
  728. [ AC_MSG_RESULT([no])
  729. AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
  730. LIBS="$save_LIBS"
  731. LDFLAGS="$save_LDFLAGS"
  732. CPPFLAGS="$save_CPPFLAGS"
  733. AC_SUBST(TOR_LIBEVENT_LIBS)
  734. dnl ------------------------------------------------------
  735. dnl Where do you live, libm?
  736. dnl On some platforms (Haiku/BeOS) the math library is
  737. dnl part of libroot. In which case don't link against lm
  738. TOR_LIB_MATH=""
  739. save_LIBS="$LIBS"
  740. AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
  741. if test "$ac_cv_search_pow" != "none required"; then
  742. TOR_LIB_MATH="$ac_cv_search_pow"
  743. fi
  744. LIBS="$save_LIBS"
  745. AC_SUBST(TOR_LIB_MATH)
  746. dnl ------------------------------------------------------
  747. dnl Where do you live, openssl? And how do we call you?
  748. tor_openssl_pkg_redhat="openssl"
  749. tor_openssl_pkg_debian="libssl-dev"
  750. tor_openssl_devpkg_redhat="openssl-devel"
  751. tor_openssl_devpkg_debian="libssl-dev"
  752. ALT_openssl_WITHVAL=""
  753. AC_ARG_WITH(ssl-dir,
  754. AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
  755. [
  756. if test "x$withval" != "xno" && test "x$withval" != "x"; then
  757. ALT_openssl_WITHVAL="$withval"
  758. fi
  759. ])
  760. AC_MSG_NOTICE([Now, we'll look for OpenSSL >= 1.0.1])
  761. TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI $TOR_LIB_WS32],
  762. [#include <openssl/ssl.h>
  763. char *getenv(const char *);],
  764. [struct ssl_cipher_st;
  765. unsigned SSL_CIPHER_get_id(const struct ssl_cipher_st *);
  766. char *getenv(const char *);],
  767. dnl This funny-looking test program calls getenv, so that the compiler
  768. dnl will neither make code that call SSL_CIPHER_get_id(NULL) [producing
  769. dnl a crash], nor optimize out the call to SSL_CIPHER_get_id().
  770. dnl We look for SSL_cipher_get_id() because it is present in
  771. dnl OpenSSL >=1.0.1, because it is not deprecated, and because Tor
  772. dnl depends on it.
  773. [if (getenv("THIS_SHOULDNT_BE_SET_X201803")) SSL_CIPHER_get_id((void *)0);], [],
  774. [/usr/local/opt/openssl /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /opt/openssl])
  775. dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
  776. if test "$enable_static_openssl" = "yes"; then
  777. if test "$tor_cv_library_openssl_dir" = "(system)"; then
  778. AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
  779. else
  780. TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
  781. fi
  782. else
  783. TOR_OPENSSL_LIBS="-lssl -lcrypto"
  784. fi
  785. AC_SUBST(TOR_OPENSSL_LIBS)
  786. dnl Now check for particular openssl functions.
  787. save_LIBS="$LIBS"
  788. save_LDFLAGS="$LDFLAGS"
  789. save_CPPFLAGS="$CPPFLAGS"
  790. LIBS="$TOR_OPENSSL_LIBS $LIBS"
  791. LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
  792. CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
  793. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  794. #include <openssl/opensslv.h>
  795. #if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
  796. #error "too old"
  797. #endif
  798. ]], [[]])],
  799. [ : ],
  800. [ 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.]) ])
  801. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  802. #include <openssl/opensslv.h>
  803. #include <openssl/evp.h>
  804. #if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
  805. #error "no ECC"
  806. #endif
  807. #if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
  808. #error "curves unavailable"
  809. #endif
  810. ]], [[]])],
  811. [ : ],
  812. [ 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.]) ])
  813. AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
  814. [#include <openssl/ssl.h>
  815. ])
  816. AC_CHECK_FUNCS([ \
  817. SSL_SESSION_get_master_key \
  818. SSL_get_server_random \
  819. SSL_get_client_ciphers \
  820. SSL_get_client_random \
  821. SSL_CTX_set1_groups_list \
  822. SSL_CIPHER_find \
  823. SSL_CTX_set_security_level \
  824. TLS_method
  825. ])
  826. dnl Check if OpenSSL has scrypt implementation.
  827. AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
  828. dnl Check if OpenSSL structures are opaque
  829. AC_CHECK_MEMBERS([SSL.state], , ,
  830. [#include <openssl/ssl.h>
  831. ])
  832. AC_CHECK_SIZEOF(SHA_CTX, , [AC_INCLUDES_DEFAULT()
  833. #include <openssl/sha.h>
  834. ])
  835. dnl Define the set of checks for KIST scheduler support.
  836. AC_DEFUN([CHECK_KIST_SUPPORT],[
  837. dnl KIST needs struct tcp_info and for certain members to exist.
  838. AC_CHECK_MEMBERS(
  839. [struct tcp_info.tcpi_unacked, struct tcp_info.tcpi_snd_mss],
  840. , ,[[#include <netinet/tcp.h>]])
  841. dnl KIST needs SIOCOUTQNSD to exist for an ioctl call.
  842. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  843. #include <linux/sockios.h>
  844. #ifndef SIOCOUTQNSD
  845. #error
  846. #endif
  847. ])], have_siocoutqnsd=yes, have_siocoutqnsd=no)
  848. if test "x$have_siocoutqnsd" = "xyes"; then
  849. if test "x$ac_cv_member_struct_tcp_info_tcpi_unacked" = "xyes"; then
  850. if test "x$ac_cv_member_struct_tcp_info_tcpi_snd_mss" = "xyes"; then
  851. have_kist_support=yes
  852. fi
  853. fi
  854. fi
  855. ])
  856. dnl Now, trigger the check.
  857. CHECK_KIST_SUPPORT
  858. AS_IF([test "x$have_kist_support" = "xyes"],
  859. [AC_DEFINE(HAVE_KIST_SUPPORT, 1, [Defined if KIST scheduler is supported
  860. on this system])],
  861. [AC_MSG_NOTICE([KIST scheduler can't be used. Missing support.])])
  862. LIBS="$save_LIBS"
  863. LDFLAGS="$save_LDFLAGS"
  864. CPPFLAGS="$save_CPPFLAGS"
  865. dnl ------------------------------------------------------
  866. dnl Where do you live, zlib? And how do we call you?
  867. tor_zlib_pkg_redhat="zlib"
  868. tor_zlib_pkg_debian="zlib1g"
  869. tor_zlib_devpkg_redhat="zlib-devel"
  870. tor_zlib_devpkg_debian="zlib1g-dev"
  871. TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
  872. [#include <zlib.h>],
  873. [const char * zlibVersion(void);],
  874. [zlibVersion();], [--with-zlib-dir],
  875. [/opt/zlib])
  876. if test "$enable_static_zlib" = "yes"; then
  877. if test "$tor_cv_library_zlib_dir" = "(system)"; then
  878. AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
  879. using --enable-static-zlib")
  880. else
  881. TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
  882. fi
  883. else
  884. TOR_ZLIB_LIBS="-lz"
  885. fi
  886. AC_SUBST(TOR_ZLIB_LIBS)
  887. dnl ------------------------------------------------------
  888. dnl Where we do we find lzma?
  889. AC_ARG_ENABLE(lzma,
  890. AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
  891. [case "${enableval}" in
  892. "yes") lzma=true ;;
  893. "no") lzma=false ;;
  894. * ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
  895. esac], [lzma=auto])
  896. if test "x$enable_lzma" = "xno"; then
  897. have_lzma=no;
  898. else
  899. PKG_CHECK_MODULES([LZMA],
  900. [liblzma],
  901. have_lzma=yes,
  902. have_lzma=no)
  903. if test "x$have_lzma" = "xno" ; then
  904. AC_MSG_WARN([Unable to find liblzma.])
  905. fi
  906. fi
  907. if test "x$have_lzma" = "xyes"; then
  908. AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
  909. TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
  910. TOR_LZMA_LIBS="${LZMA_LIBS}"
  911. fi
  912. AC_SUBST(TOR_LZMA_CFLAGS)
  913. AC_SUBST(TOR_LZMA_LIBS)
  914. dnl ------------------------------------------------------
  915. dnl Where we do we find zstd?
  916. AC_ARG_ENABLE(zstd,
  917. AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
  918. [case "${enableval}" in
  919. "yes") zstd=true ;;
  920. "no") zstd=false ;;
  921. * ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
  922. esac], [zstd=auto])
  923. if test "x$enable_zstd" = "xno"; then
  924. have_zstd=no;
  925. else
  926. PKG_CHECK_MODULES([ZSTD],
  927. [libzstd >= 1.1],
  928. have_zstd=yes,
  929. have_zstd=no)
  930. if test "x$have_zstd" = "xno" ; then
  931. AC_MSG_WARN([Unable to find libzstd.])
  932. fi
  933. fi
  934. if test "x$have_zstd" = "xyes"; then
  935. AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
  936. TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
  937. TOR_ZSTD_LIBS="${ZSTD_LIBS}"
  938. dnl now check for zstd functions
  939. save_LIBS="$LIBS"
  940. save_CFLAGS="$CFLAGS"
  941. LIBS="$LIBS $ZSTD_LIBS"
  942. CFLAGS="$CFLAGS $ZSTD_CFLAGS"
  943. AC_CHECK_FUNCS(ZSTD_estimateCStreamSize \
  944. ZSTD_estimateDCtxSize)
  945. LIBS="$save_LIBS"
  946. CFLAGS="$save_CFLAGS"
  947. fi
  948. AC_SUBST(TOR_ZSTD_CFLAGS)
  949. AC_SUBST(TOR_ZSTD_LIBS)
  950. dnl ----------------------------------------------------------------------
  951. dnl Check if libcap is available for capabilities.
  952. tor_cap_pkg_debian="libcap2"
  953. tor_cap_pkg_redhat="libcap"
  954. tor_cap_devpkg_debian="libcap-dev"
  955. tor_cap_devpkg_redhat="libcap-devel"
  956. AC_CHECK_LIB([cap], [cap_init], [],
  957. AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
  958. )
  959. AC_CHECK_FUNCS(cap_set_proc)
  960. dnl ---------------------------------------------------------------------
  961. dnl Now that we know about our major libraries, we can check for compiler
  962. dnl and linker hardening options. We need to do this with the libraries known,
  963. dnl since sometimes the linker will like an option but not be willing to
  964. dnl use it with a build of a library.
  965. all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
  966. all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_LIB_USERENV $TOR_CAP_LIBS"
  967. CFLAGS_FTRAPV=
  968. CFLAGS_FWRAPV=
  969. CFLAGS_ASAN=
  970. CFLAGS_UBSAN=
  971. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
  972. #if !defined(__clang__)
  973. #error
  974. #endif])], have_clang=yes, have_clang=no)
  975. if test "x$enable_gcc_hardening" != "xno"; then
  976. CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
  977. if test "x$have_clang" = "xyes"; then
  978. TOR_CHECK_CFLAGS(-Qunused-arguments)
  979. fi
  980. TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
  981. AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
  982. AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
  983. m4_ifdef([AS_VAR_IF],[
  984. AS_VAR_IF(can_compile, [yes],
  985. AS_VAR_IF(can_link, [yes],
  986. [],
  987. 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.)]))
  988. )])
  989. AS_VAR_POPDEF([can_link])
  990. AS_VAR_POPDEF([can_compile])
  991. TOR_CHECK_CFLAGS(-Wstack-protector)
  992. TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
  993. if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
  994. TOR_CHECK_CFLAGS(-fPIE)
  995. TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
  996. fi
  997. TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
  998. fi
  999. if test "$fragile_hardening" = "yes"; then
  1000. TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
  1001. if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
  1002. 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.])
  1003. fi
  1004. if test "$tor_cv_cflags__ftrapv" != "yes"; then
  1005. AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
  1006. fi
  1007. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
  1008. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1009. AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.*, and with Clang you need libclang_rt.ubsan*])
  1010. fi
  1011. TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
  1012. if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
  1013. AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.*, and with Clang you need libclang_rt.ubsan*])
  1014. fi
  1015. TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
  1016. fi
  1017. dnl Find the correct libraries to add in order to use the sanitizers.
  1018. dnl
  1019. dnl When building Rust, Cargo will run the linker with the -nodefaultlibs
  1020. dnl option, which will prevent the compiler from linking the sanitizer
  1021. dnl libraries it needs. We need to specify them manually.
  1022. dnl
  1023. dnl What's more, we need to specify them in a linker script rather than
  1024. dnl from build.rs: these options aren't allowed in the cargo:rustc-flags
  1025. dnl variable.
  1026. RUST_LINKER_OPTIONS=""
  1027. if test "x$have_clang" = "xyes"; then
  1028. if test "x$CFLAGS_ASAN" != "x"; then
  1029. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS $CFLAGS_ASAN"
  1030. fi
  1031. if test "x$CFLAGS_UBSAN" != "x"; then
  1032. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS $CFLAGS_UBSAN"
  1033. fi
  1034. else
  1035. if test "x$CFLAGS_ASAN" != "x"; then
  1036. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -lasan"
  1037. fi
  1038. if test "x$CFLAGS_UBSAN" != "x"; then
  1039. RUST_LINKER_OPTIONS="$RUST_LINKER_OPTIONS -lubsan"
  1040. fi
  1041. fi
  1042. AC_SUBST(RUST_LINKER_OPTIONS)
  1043. CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
  1044. CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
  1045. mulodi_fixes_ftrapv=no
  1046. if test "$have_clang" = "yes"; then
  1047. saved_CFLAGS="$CFLAGS"
  1048. CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  1049. AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  1050. AC_LINK_IFELSE([
  1051. AC_LANG_SOURCE([[
  1052. #include <stdint.h>
  1053. #include <stdlib.h>
  1054. int main(int argc, char **argv)
  1055. {
  1056. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1057. * (int64_t)atoi(argv[3]);
  1058. return x == 9;
  1059. } ]])],
  1060. [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
  1061. [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  1062. if test "$ftrapv_can_link" = "no"; then
  1063. AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
  1064. AC_LINK_IFELSE([
  1065. AC_LANG_SOURCE([[
  1066. #include <stdint.h>
  1067. #include <stdlib.h>
  1068. int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
  1069. *overflow=0;
  1070. return a;
  1071. }
  1072. int main(int argc, char **argv)
  1073. {
  1074. int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
  1075. * (int64_t)atoi(argv[3]);
  1076. return x == 9;
  1077. } ]])],
  1078. [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
  1079. [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  1080. fi
  1081. CFLAGS="$saved_CFLAGS"
  1082. fi
  1083. AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
  1084. dnl These cflags add bunches of branches, and we haven't been able to
  1085. dnl persuade ourselves that they're suitable for code that needs to be
  1086. dnl constant time.
  1087. AC_SUBST(CFLAGS_BUGTRAP)
  1088. dnl These cflags are variant ones sutable for code that needs to be
  1089. dnl constant-time.
  1090. AC_SUBST(CFLAGS_CONSTTIME)
  1091. if test "x$enable_linker_hardening" != "xno"; then
  1092. TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
  1093. fi
  1094. # For backtrace support
  1095. TOR_CHECK_LDFLAGS(-rdynamic)
  1096. dnl ------------------------------------------------------
  1097. dnl Now see if we have a -fomit-frame-pointer compiler option.
  1098. saved_CFLAGS="$CFLAGS"
  1099. TOR_CHECK_CFLAGS(-fomit-frame-pointer)
  1100. F_OMIT_FRAME_POINTER=''
  1101. if test "$saved_CFLAGS" != "$CFLAGS"; then
  1102. if test "$fragile_hardening" = "yes"; then
  1103. F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  1104. fi
  1105. fi
  1106. CFLAGS="$saved_CFLAGS"
  1107. AC_SUBST(F_OMIT_FRAME_POINTER)
  1108. dnl ------------------------------------------------------
  1109. dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
  1110. dnl for us, as GCC 4.6 and later do at many optimization levels), then
  1111. dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
  1112. dnl code will work.
  1113. TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)
  1114. dnl ============================================================
  1115. dnl Check for libseccomp
  1116. if test "x$enable_seccomp" != "xno"; then
  1117. AC_CHECK_HEADERS([seccomp.h])
  1118. AC_SEARCH_LIBS(seccomp_init, [seccomp])
  1119. fi
  1120. dnl ============================================================
  1121. dnl Check for libscrypt
  1122. if test "x$enable_libscrypt" != "xno"; then
  1123. AC_CHECK_HEADERS([libscrypt.h])
  1124. AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
  1125. AC_CHECK_FUNCS([libscrypt_scrypt])
  1126. fi
  1127. dnl ============================================================
  1128. dnl We need an implementation of curve25519.
  1129. dnl set these defaults.
  1130. build_curve25519_donna=no
  1131. build_curve25519_donna_c64=no
  1132. use_curve25519_donna=no
  1133. use_curve25519_nacl=no
  1134. CURVE25519_LIBS=
  1135. dnl The best choice is using curve25519-donna-c64, but that requires
  1136. dnl that we
  1137. AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  1138. tor_cv_can_use_curve25519_donna_c64,
  1139. [AC_RUN_IFELSE(
  1140. [AC_LANG_PROGRAM([dnl
  1141. #include <stdint.h>
  1142. typedef unsigned uint128_t __attribute__((mode(TI)));
  1143. int func(uint64_t a, uint64_t b) {
  1144. uint128_t c = ((uint128_t)a) * b;
  1145. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1146. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1147. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1148. (((uint64_t)(c))&0xffffffffL) == 0;
  1149. return ok;
  1150. }
  1151. ], [dnl
  1152. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1153. ((uint64_t)1234567890) << 24);
  1154. return !ok;
  1155. ])],
  1156. [tor_cv_can_use_curve25519_donna_c64=yes],
  1157. [tor_cv_can_use_curve25519_donna_c64=no],
  1158. [AC_LINK_IFELSE(
  1159. [AC_LANG_PROGRAM([dnl
  1160. #include <stdint.h>
  1161. typedef unsigned uint128_t __attribute__((mode(TI)));
  1162. int func(uint64_t a, uint64_t b) {
  1163. uint128_t c = ((uint128_t)a) * b;
  1164. int ok = ((uint64_t)(c>>96)) == 522859 &&
  1165. (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
  1166. (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
  1167. (((uint64_t)(c))&0xffffffffL) == 0;
  1168. return ok;
  1169. }
  1170. ], [dnl
  1171. int ok = func( ((uint64_t)2000000000) * 1000000000,
  1172. ((uint64_t)1234567890) << 24);
  1173. return !ok;
  1174. ])],
  1175. [tor_cv_can_use_curve25519_donna_c64=cross],
  1176. [tor_cv_can_use_curve25519_donna_c64=no])])])
  1177. AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
  1178. nacl/crypto_scalarmult_curve25519.h])
  1179. AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  1180. tor_cv_can_use_curve25519_nacl,
  1181. [tor_saved_LIBS="$LIBS"
  1182. LIBS="$LIBS -lnacl"
  1183. AC_LINK_IFELSE(
  1184. [AC_LANG_PROGRAM([dnl
  1185. #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
  1186. #include <crypto_scalarmult_curve25519.h>
  1187. #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
  1188. #include <nacl/crypto_scalarmult_curve25519.h>
  1189. #endif
  1190. #ifdef crypto_scalarmult_curve25519_ref_BYTES
  1191. #error Hey, this is the reference implementation! That's not fast.
  1192. #endif
  1193. ], [
  1194. unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
  1195. ])], [tor_cv_can_use_curve25519_nacl=yes],
  1196. [tor_cv_can_use_curve25519_nacl=no])
  1197. LIBS="$tor_saved_LIBS" ])
  1198. dnl Okay, now we need to figure out which one to actually use. Fall back
  1199. dnl to curve25519-donna.c
  1200. if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
  1201. build_curve25519_donna_c64=yes
  1202. use_curve25519_donna=yes
  1203. elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
  1204. use_curve25519_nacl=yes
  1205. CURVE25519_LIBS=-lnacl
  1206. else
  1207. build_curve25519_donna=yes
  1208. use_curve25519_donna=yes
  1209. fi
  1210. if test "x$use_curve25519_donna" = "xyes"; then
  1211. AC_DEFINE(USE_CURVE25519_DONNA, 1,
  1212. [Defined if we should use an internal curve25519_donna{,_c64} implementation])
  1213. fi
  1214. if test "x$use_curve25519_nacl" = "xyes"; then
  1215. AC_DEFINE(USE_CURVE25519_NACL, 1,
  1216. [Defined if we should use a curve25519 from nacl])
  1217. fi
  1218. AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  1219. test "x$build_curve25519_donna" = "xyes")
  1220. AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  1221. test "x$build_curve25519_donna_c64" = "xyes")
  1222. AC_SUBST(CURVE25519_LIBS)
  1223. dnl Make sure to enable support for large off_t if available.
  1224. AC_SYS_LARGEFILE
  1225. AC_CHECK_HEADERS([assert.h \
  1226. errno.h \
  1227. fcntl.h \
  1228. signal.h \
  1229. string.h \
  1230. sys/capability.h \
  1231. sys/fcntl.h \
  1232. sys/stat.h \
  1233. sys/time.h \
  1234. sys/types.h \
  1235. time.h \
  1236. unistd.h \
  1237. arpa/inet.h \
  1238. crt_externs.h \
  1239. execinfo.h \
  1240. gnu/libc-version.h \
  1241. grp.h \
  1242. ifaddrs.h \
  1243. inttypes.h \
  1244. limits.h \
  1245. linux/types.h \
  1246. machine/limits.h \
  1247. malloc.h \
  1248. malloc/malloc.h \
  1249. malloc_np.h \
  1250. netdb.h \
  1251. netinet/in.h \
  1252. netinet/in6.h \
  1253. pwd.h \
  1254. readpassphrase.h \
  1255. stdint.h \
  1256. stdatomic.h \
  1257. sys/eventfd.h \
  1258. sys/file.h \
  1259. sys/ioctl.h \
  1260. sys/limits.h \
  1261. sys/mman.h \
  1262. sys/param.h \
  1263. sys/prctl.h \
  1264. sys/random.h \
  1265. sys/resource.h \
  1266. sys/select.h \
  1267. sys/socket.h \
  1268. sys/statvfs.h \
  1269. sys/syscall.h \
  1270. sys/sysctl.h \
  1271. sys/syslimits.h \
  1272. sys/time.h \
  1273. sys/types.h \
  1274. sys/un.h \
  1275. sys/utime.h \
  1276. sys/wait.h \
  1277. syslog.h \
  1278. utime.h])
  1279. AC_CHECK_HEADERS(sys/param.h)
  1280. AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
  1281. [#ifdef HAVE_SYS_TYPES_H
  1282. #include <sys/types.h>
  1283. #endif
  1284. #ifdef HAVE_SYS_SOCKET_H
  1285. #include <sys/socket.h>
  1286. #endif])
  1287. AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
  1288. [#ifdef HAVE_SYS_TYPES_H
  1289. #include <sys/types.h>
  1290. #endif
  1291. #ifdef HAVE_SYS_SOCKET_H
  1292. #include <sys/socket.h>
  1293. #endif
  1294. #ifdef HAVE_NET_IF_H
  1295. #include <net/if.h>
  1296. #endif
  1297. #ifdef HAVE_NETINET_IN_H
  1298. #include <netinet/in.h>
  1299. #endif])
  1300. AC_CHECK_HEADERS(linux/if.h,[],[],
  1301. [
  1302. #ifdef HAVE_SYS_SOCKET_H
  1303. #include <sys/socket.h>
  1304. #endif
  1305. ])
  1306. AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
  1307. linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
  1308. [#ifdef HAVE_SYS_TYPES_H
  1309. #include <sys/types.h>
  1310. #endif
  1311. #ifdef HAVE_SYS_SOCKET_H
  1312. #include <sys/socket.h>
  1313. #endif
  1314. #ifdef HAVE_LIMITS_H
  1315. #include <limits.h>
  1316. #endif
  1317. #ifdef HAVE_LINUX_TYPES_H
  1318. #include <linux/types.h>
  1319. #endif
  1320. #ifdef HAVE_NETINET_IN6_H
  1321. #include <netinet/in6.h>
  1322. #endif
  1323. #ifdef HAVE_NETINET_IN_H
  1324. #include <netinet/in.h>
  1325. #endif])
  1326. AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
  1327. linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
  1328. [#ifdef HAVE_SYS_TYPES_H
  1329. #include <sys/types.h>
  1330. #endif
  1331. #ifdef HAVE_SYS_SOCKET_H
  1332. #include <sys/socket.h>
  1333. #endif
  1334. #ifdef HAVE_LIMITS_H
  1335. #include <limits.h>
  1336. #endif
  1337. #ifdef HAVE_LINUX_TYPES_H
  1338. #include <linux/types.h>
  1339. #endif
  1340. #ifdef HAVE_NETINET_IN6_H
  1341. #include <netinet/in6.h>
  1342. #endif
  1343. #ifdef HAVE_NETINET_IN_H
  1344. #include <netinet/in.h>
  1345. #endif
  1346. #ifdef HAVE_LINUX_IF_H
  1347. #include <linux/if.h>
  1348. #endif])
  1349. transparent_ok=0
  1350. if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  1351. transparent_ok=1
  1352. fi
  1353. if test "x$linux_netfilter_ipv4" = "x1"; then
  1354. transparent_ok=1
  1355. fi
  1356. if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  1357. transparent_ok=1
  1358. fi
  1359. if test "x$transparent_ok" = "x1"; then
  1360. AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  1361. else
  1362. AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
  1363. fi
  1364. AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
  1365. [#ifdef HAVE_SYS_TYPES_H
  1366. #include <sys/types.h>
  1367. #endif
  1368. #ifdef HAVE_SYS_TIME_H
  1369. #include <sys/time.h>
  1370. #endif])
  1371. dnl In case we aren't given a working stdint.h, we'll need to grow our own.
  1372. dnl Watch out.
  1373. AC_CHECK_SIZEOF(int8_t)
  1374. AC_CHECK_SIZEOF(int16_t)
  1375. AC_CHECK_SIZEOF(int32_t)
  1376. AC_CHECK_SIZEOF(int64_t)
  1377. AC_CHECK_SIZEOF(uint8_t)
  1378. AC_CHECK_SIZEOF(uint16_t)
  1379. AC_CHECK_SIZEOF(uint32_t)
  1380. AC_CHECK_SIZEOF(uint64_t)
  1381. AC_CHECK_SIZEOF(intptr_t)
  1382. AC_CHECK_SIZEOF(uintptr_t)
  1383. dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
  1384. AC_CHECK_SIZEOF(char)
  1385. AC_CHECK_SIZEOF(short)
  1386. AC_CHECK_SIZEOF(int)
  1387. AC_CHECK_SIZEOF(long)
  1388. AC_CHECK_SIZEOF(long long)
  1389. AC_CHECK_SIZEOF(__int64)
  1390. AC_CHECK_SIZEOF(void *)
  1391. AC_CHECK_SIZEOF(time_t)
  1392. AC_CHECK_SIZEOF(size_t)
  1393. AC_CHECK_SIZEOF(pid_t)
  1394. AC_CHECK_TYPES([uint, u_char, ssize_t])
  1395. AC_PC_FROM_UCONTEXT([:])
  1396. dnl used to include sockaddr_storage, but everybody has that.
  1397. AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
  1398. [#ifdef HAVE_SYS_TYPES_H
  1399. #include <sys/types.h>
  1400. #endif
  1401. #ifdef HAVE_NETINET_IN_H
  1402. #include <netinet/in.h>
  1403. #endif
  1404. #ifdef HAVE_NETINET_IN6_H
  1405. #include <netinet/in6.h>
  1406. #endif
  1407. #ifdef HAVE_SYS_SOCKET_H
  1408. #include <sys/socket.h>
  1409. #endif
  1410. #ifdef _WIN32
  1411. #define _WIN32_WINNT 0x0501
  1412. #define WIN32_LEAN_AND_MEAN
  1413. #include <winsock2.h>
  1414. #include <ws2tcpip.h>
  1415. #endif
  1416. ])
  1417. AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
  1418. [#ifdef HAVE_SYS_TYPES_H
  1419. #include <sys/types.h>
  1420. #endif
  1421. #ifdef HAVE_NETINET_IN_H
  1422. #include <netinet/in.h>
  1423. #endif
  1424. #ifdef HAVE_NETINET_IN6_H
  1425. #include <netinet/in6.h>
  1426. #endif
  1427. #ifdef HAVE_SYS_SOCKET_H
  1428. #include <sys/socket.h>
  1429. #endif
  1430. #ifdef _WIN32
  1431. #define _WIN32_WINNT 0x0501
  1432. #define WIN32_LEAN_AND_MEAN
  1433. #include <winsock2.h>
  1434. #include <ws2tcpip.h>
  1435. #endif
  1436. ])
  1437. AC_CHECK_TYPES([rlim_t], , ,
  1438. [#ifdef HAVE_SYS_TYPES_H
  1439. #include <sys/types.h>
  1440. #endif
  1441. #ifdef HAVE_SYS_TIME_H
  1442. #include <sys/time.h>
  1443. #endif
  1444. #ifdef HAVE_SYS_RESOURCE_H
  1445. #include <sys/resource.h>
  1446. #endif
  1447. ])
  1448. AX_CHECK_SIGN([time_t],
  1449. [ : ],
  1450. [ : ], [
  1451. #ifdef HAVE_SYS_TYPES_H
  1452. #include <sys/types.h>
  1453. #endif
  1454. #ifdef HAVE_SYS_TIME_H
  1455. #include <sys/time.h>
  1456. #endif
  1457. #ifdef HAVE_TIME_H
  1458. #include <time.h>
  1459. #endif
  1460. ])
  1461. if test "$ax_cv_decl_time_t_signed" = "no"; then
  1462. AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
  1463. fi
  1464. AX_CHECK_SIGN([size_t],
  1465. [ tor_cv_size_t_signed=yes ],
  1466. [ tor_cv_size_t_signed=no ], [
  1467. #ifdef HAVE_SYS_TYPES_H
  1468. #include <sys/types.h>
  1469. #endif
  1470. ])
  1471. if test "$ax_cv_decl_size_t_signed" = "yes"; then
  1472. AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
  1473. fi
  1474. AX_CHECK_SIGN([enum always],
  1475. [ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
  1476. [ : ], [
  1477. enum always { AAA, BBB, CCC };
  1478. ])
  1479. AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
  1480. #ifdef HAVE_SYS_SOCKET_H
  1481. #include <sys/socket.h>
  1482. #endif
  1483. ])
  1484. # We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
  1485. AC_CHECK_SIZEOF(cell_t)
  1486. # Let's see if stdatomic works. (There are some debian clangs that screw it
  1487. # up; see Tor bug #26779 and debian bug 903709.)
  1488. AC_CACHE_CHECK([whether C11 stdatomic.h actually works],
  1489. tor_cv_stdatomic_works,
  1490. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1491. #include <stdatomic.h>
  1492. struct x { atomic_size_t y; };
  1493. void try_atomic_init(struct x *xx)
  1494. {
  1495. atomic_init(&xx->y, 99);
  1496. atomic_fetch_add(&xx->y, 1);
  1497. }
  1498. ]])], [tor_cv_stdatomic_works=yes], [tor_cv_stdatomic_works=no])])
  1499. if test "$tor_cv_stdatomic_works" = "yes"; then
  1500. AC_DEFINE(STDATOMIC_WORKS, 1, [Set to 1 if we can compile a simple stdatomic example.])
  1501. elif test "$ac_cv_header_stdatomic_h" = "yes"; then
  1502. AC_MSG_WARN([Your compiler provides the stdatomic.h header, but it doesn't seem to work. I'll pretend it isn't there. If you are using Clang on Debian, maybe this is because of https://bugs.debian.org/903709 ])
  1503. fi
  1504. # Now make sure that NULL can be represented as zero bytes.
  1505. AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
  1506. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1507. [[#include <stdlib.h>
  1508. #include <string.h>
  1509. #include <stdio.h>
  1510. #ifdef HAVE_STDDEF_H
  1511. #include <stddef.h>
  1512. #endif
  1513. int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
  1514. return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
  1515. [tor_cv_null_is_zero=yes],
  1516. [tor_cv_null_is_zero=no],
  1517. [tor_cv_null_is_zero=cross])])
  1518. if test "$tor_cv_null_is_zero" = "cross"; then
  1519. # Cross-compiling; let's hope that the target isn't raving mad.
  1520. AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
  1521. fi
  1522. if test "$tor_cv_null_is_zero" != "no"; then
  1523. AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
  1524. [Define to 1 iff memset(0) sets pointers to NULL])
  1525. fi
  1526. AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
  1527. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1528. [[#include <stdlib.h>
  1529. #include <string.h>
  1530. #include <stdio.h>
  1531. #ifdef HAVE_STDDEF_H
  1532. #include <stddef.h>
  1533. #endif
  1534. int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
  1535. return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
  1536. [tor_cv_dbl0_is_zero=yes],
  1537. [tor_cv_dbl0_is_zero=no],
  1538. [tor_cv_dbl0_is_zero=cross])])
  1539. if test "$tor_cv_dbl0_is_zero" = "cross"; then
  1540. # Cross-compiling; let's hope that the target isn't raving mad.
  1541. AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
  1542. fi
  1543. if test "$tor_cv_dbl0_is_zero" != "no"; then
  1544. AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
  1545. [Define to 1 iff memset(0) sets doubles to 0.0])
  1546. fi
  1547. # And what happens when we malloc zero?
  1548. AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
  1549. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1550. [[#include <stdlib.h>
  1551. #include <string.h>
  1552. #include <stdio.h>
  1553. #ifdef HAVE_STDDEF_H
  1554. #include <stddef.h>
  1555. #endif
  1556. int main () { return malloc(0)?0:1; }]])],
  1557. [tor_cv_malloc_zero_works=yes],
  1558. [tor_cv_malloc_zero_works=no],
  1559. [tor_cv_malloc_zero_works=cross])])
  1560. if test "$tor_cv_malloc_zero_works" = "cross"; then
  1561. # Cross-compiling; let's hope that the target isn't raving mad.
  1562. AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
  1563. fi
  1564. if test "$tor_cv_malloc_zero_works" = "yes"; then
  1565. AC_DEFINE([MALLOC_ZERO_WORKS], 1,
  1566. [Define to 1 iff malloc(0) returns a pointer])
  1567. fi
  1568. # whether we seem to be in a 2s-complement world.
  1569. AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
  1570. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1571. [[int main () { int problem = ((-99) != (~99)+1);
  1572. return problem ? 1 : 0; }]])],
  1573. [tor_cv_twos_complement=yes],
  1574. [tor_cv_twos_complement=no],
  1575. [tor_cv_twos_complement=cross])])
  1576. if test "$tor_cv_twos_complement" = "cross"; then
  1577. # Cross-compiling; let's hope that the target isn't raving mad.
  1578. AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
  1579. fi
  1580. if test "$tor_cv_twos_complement" != "no"; then
  1581. AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
  1582. [Define to 1 iff we represent negative integers with
  1583. two's complement])
  1584. fi
  1585. # What does shifting a negative value do?
  1586. AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
  1587. [AC_RUN_IFELSE([AC_LANG_SOURCE(
  1588. [[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
  1589. [tor_cv_sign_extend=yes],
  1590. [tor_cv_sign_extend=no],
  1591. [tor_cv_sign_extend=cross])])
  1592. if test "$tor_cv_sign_extend" = "cross"; then
  1593. # Cross-compiling; let's hope that the target isn't raving mad.
  1594. AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
  1595. fi
  1596. if test "$tor_cv_sign_extend" != "no"; then
  1597. AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
  1598. [Define to 1 iff right-shifting a negative value performs sign-extension])
  1599. fi
  1600. # Is uint8_t the same type as unsigned char?
  1601. AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
  1602. [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  1603. #include <stdint.h>
  1604. extern uint8_t c;
  1605. unsigned char c;]])],
  1606. [tor_cv_uint8_uchar=yes],
  1607. [tor_cv_uint8_uchar=no],
  1608. [tor_cv_uint8_uchar=cross])])
  1609. if test "$tor_cv_uint8_uchar" = "cross"; then
  1610. AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
  1611. fi
  1612. if test "$tor_cv_uint8_uchar" = "no"; then
  1613. AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
  1614. fi
  1615. # Whether we should use the dmalloc memory allocation debugging library.
  1616. AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
  1617. AC_ARG_WITH(dmalloc,
  1618. AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
  1619. [if [[ "$withval" = "yes" ]]; then
  1620. dmalloc=1
  1621. AC_MSG_RESULT(yes)
  1622. else
  1623. dmalloc=1
  1624. AC_MSG_RESULT(no)
  1625. fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
  1626. )
  1627. if [[ $dmalloc -eq 1 ]]; then
  1628. AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
  1629. AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
  1630. AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
  1631. AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
  1632. fi
  1633. AC_ARG_WITH(tcmalloc,
  1634. AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
  1635. [ tcmalloc=yes ], [ tcmalloc=no ])
  1636. if test "x$tcmalloc" = "xyes"; then
  1637. LDFLAGS="-ltcmalloc $LDFLAGS"
  1638. fi
  1639. using_custom_malloc=no
  1640. if test "x$enable_openbsd_malloc" = "xyes"; then
  1641. using_custom_malloc=yes
  1642. fi
  1643. if test "x$tcmalloc" = "xyes"; then
  1644. using_custom_malloc=yes
  1645. fi
  1646. if test "$using_custom_malloc" = "no"; then
  1647. AC_CHECK_FUNCS(mallinfo)
  1648. fi
  1649. if test "$using_custom_malloc" = "yes"; then
  1650. # Tell the C compiler not to use the system allocator functions.
  1651. TOR_CHECK_CFLAGS([-fno-builtin-malloc -fno-builtin-realloc -fno-builtin-calloc -fno-builtin-free])
  1652. fi
  1653. # By default, we're going to assume we don't have mlockall()
  1654. # bionic and other platforms have various broken mlockall subsystems.
  1655. # Some systems don't have a working mlockall, some aren't linkable,
  1656. # and some have it but don't declare it.
  1657. AC_CHECK_FUNCS(mlockall)
  1658. AC_CHECK_DECLS([mlockall], , , [
  1659. #ifdef HAVE_SYS_MMAN_H
  1660. #include <sys/mman.h>
  1661. #endif])
  1662. # Allow user to specify an alternate syslog facility
  1663. AC_ARG_WITH(syslog-facility,
  1664. AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
  1665. syslog_facility="$withval", syslog_facility="LOG_DAEMON")
  1666. AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
  1667. AC_SUBST(LOGFACILITY)
  1668. # Check if we have getresuid and getresgid
  1669. AC_CHECK_FUNCS(getresuid getresgid)
  1670. # Check for gethostbyname_r in all its glorious incompatible versions.
  1671. # (This logic is based on that in Python's configure.in)
  1672. AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
  1673. [Define this if you have any gethostbyname_r()])
  1674. AC_CHECK_FUNC(gethostbyname_r, [
  1675. AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
  1676. OLD_CFLAGS=$CFLAGS
  1677. CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
  1678. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1679. #include <netdb.h>
  1680. ]], [[
  1681. char *cp1, *cp2;
  1682. struct hostent *h1, *h2;
  1683. int i1, i2;
  1684. (void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
  1685. ]])],[
  1686. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1687. AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
  1688. [Define this if gethostbyname_r takes 6 arguments])
  1689. AC_MSG_RESULT(6)
  1690. ], [
  1691. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1692. #include <netdb.h>
  1693. ]], [[
  1694. char *cp1, *cp2;
  1695. struct hostent *h1;
  1696. int i1, i2;
  1697. (void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
  1698. ]])], [
  1699. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1700. AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
  1701. [Define this if gethostbyname_r takes 5 arguments])
  1702. AC_MSG_RESULT(5)
  1703. ], [
  1704. AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  1705. #include <netdb.h>
  1706. ]], [[
  1707. char *cp1;
  1708. struct hostent *h1;
  1709. struct hostent_data hd;
  1710. (void) gethostbyname_r(cp1,h1,&hd);
  1711. ]])], [
  1712. AC_DEFINE(HAVE_GETHOSTBYNAME_R)
  1713. AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
  1714. [Define this if gethostbyname_r takes 3 arguments])
  1715. AC_MSG_RESULT(3)
  1716. ], [
  1717. AC_MSG_RESULT(0)
  1718. ])
  1719. ])
  1720. ])
  1721. CFLAGS=$OLD_CFLAGS
  1722. ])
  1723. AC_CACHE_CHECK([whether the C compiler supports __func__],
  1724. tor_cv_have_func_macro,
  1725. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1726. #include <stdio.h>
  1727. int main(int c, char **v) { puts(__func__); }])],
  1728. tor_cv_have_func_macro=yes,
  1729. tor_cv_have_func_macro=no))
  1730. AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
  1731. tor_cv_have_FUNC_macro,
  1732. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1733. #include <stdio.h>
  1734. int main(int c, char **v) { puts(__FUNC__); }])],
  1735. tor_cv_have_FUNC_macro=yes,
  1736. tor_cv_have_FUNC_macro=no))
  1737. AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
  1738. tor_cv_have_FUNCTION_macro,
  1739. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1740. #include <stdio.h>
  1741. int main(int c, char **v) { puts(__FUNCTION__); }])],
  1742. tor_cv_have_FUNCTION_macro=yes,
  1743. tor_cv_have_FUNCTION_macro=no))
  1744. AC_CACHE_CHECK([whether we have extern char **environ already declared],
  1745. tor_cv_have_environ_declared,
  1746. AC_COMPILE_IFELSE([AC_LANG_SOURCE([
  1747. #ifdef HAVE_UNISTD_H
  1748. #include <unistd.h>
  1749. #endif
  1750. #include <stdlib.h>
  1751. int main(int c, char **v) { char **t = environ; }])],
  1752. tor_cv_have_environ_declared=yes,
  1753. tor_cv_have_environ_declared=no))
  1754. if test "$tor_cv_have_func_macro" = "yes"; then
  1755. AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
  1756. fi
  1757. if test "$tor_cv_have_FUNC_macro" = "yes"; then
  1758. AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
  1759. fi
  1760. if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
  1761. AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
  1762. [Defined if the compiler supports __FUNCTION__])
  1763. fi
  1764. if test "$tor_cv_have_environ_declared" = "yes"; then
  1765. AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
  1766. [Defined if we have extern char **environ already declared])
  1767. fi
  1768. # $prefix stores the value of the --prefix command line option, or
  1769. # NONE if the option wasn't set. In the case that it wasn't set, make
  1770. # it be the default, so that we can use it to expand directories now.
  1771. if test "x$prefix" = "xNONE"; then
  1772. prefix=$ac_default_prefix
  1773. fi
  1774. # and similarly for $exec_prefix
  1775. if test "x$exec_prefix" = "xNONE"; then
  1776. exec_prefix=$prefix
  1777. fi
  1778. if test "x$BUILDDIR" = "x"; then
  1779. BUILDDIR=`pwd`
  1780. fi
  1781. AC_SUBST(BUILDDIR)
  1782. AH_TEMPLATE([BUILDDIR],[tor's build directory])
  1783. AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
  1784. if test "x$SRCDIR" = "x"; then
  1785. SRCDIR=$(cd "$srcdir"; pwd)
  1786. fi
  1787. AH_TEMPLATE([SRCDIR],[tor's sourcedir directory])
  1788. AC_DEFINE_UNQUOTED(SRCDIR,"$SRCDIR")
  1789. if test "x$CONFDIR" = "x"; then
  1790. CONFDIR=`eval echo $sysconfdir/tor`
  1791. fi
  1792. AC_SUBST(CONFDIR)
  1793. AH_TEMPLATE([CONFDIR],[tor's configuration directory])
  1794. AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
  1795. BINDIR=`eval echo $bindir`
  1796. AC_SUBST(BINDIR)
  1797. LOCALSTATEDIR=`eval echo $localstatedir`
  1798. AC_SUBST(LOCALSTATEDIR)
  1799. if test "$bwin32" = "true"; then
  1800. # Test if the linker supports the --nxcompat and --dynamicbase options
  1801. # for Windows
  1802. save_LDFLAGS="$LDFLAGS"
  1803. LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
  1804. AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
  1805. AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
  1806. [AC_MSG_RESULT([yes])]
  1807. [save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
  1808. [AC_MSG_RESULT([no])]
  1809. )
  1810. LDFLAGS="$save_LDFLAGS"
  1811. fi
  1812. # Set CFLAGS _after_ all the above checks, since our warnings are stricter
  1813. # than autoconf's macros like.
  1814. if test "$GCC" = "yes"; then
  1815. # Disable GCC's strict aliasing checks. They are an hours-to-debug
  1816. # accident waiting to happen.
  1817. CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
  1818. else
  1819. # Override optimization level for non-gcc compilers
  1820. CFLAGS="$CFLAGS -O"
  1821. enable_gcc_warnings=no
  1822. enable_gcc_warnings_advisory=no
  1823. fi
  1824. # Warnings implies advisory-warnings and -Werror.
  1825. if test "$enable_gcc_warnings" = "yes"; then
  1826. enable_gcc_warnings_advisory=yes
  1827. enable_fatal_warnings=yes
  1828. fi
  1829. # OS X Lion started deprecating the system openssl. Let's just disable
  1830. # all deprecation warnings on OS X. Also, to potentially make the binary
  1831. # a little smaller, let's enable dead_strip.
  1832. case "$host_os" in
  1833. darwin*)
  1834. CFLAGS="$CFLAGS -Wno-deprecated-declarations"
  1835. LDFLAGS="$LDFLAGS -dead_strip" ;;
  1836. esac
  1837. # Add some more warnings which we use in development but not in the
  1838. # released versions. (Some relevant gcc versions can't handle these.)
  1839. #
  1840. # Note that we have to do this near the end of the autoconf process, or
  1841. # else we may run into problems when these warnings hit on the testing C
  1842. # programs that autoconf wants to build.
  1843. if test "x$enable_gcc_warnings_advisory" != "xno"; then
  1844. case "$host" in
  1845. *-*-openbsd* | *-*-bitrig*)
  1846. # Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
  1847. # That's fine, except that the headers don't pass -Wredundant-decls.
  1848. # Therefore, let's disable -Wsystem-headers when we're building
  1849. # with maximal warnings on OpenBSD.
  1850. CFLAGS="$CFLAGS -Wno-system-headers" ;;
  1851. esac
  1852. # GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
  1853. # have it work better.
  1854. # CFLAGS="$CFLAGS -Wstrict-overflow=1"
  1855. # This warning was added in gcc 4.3, but it appears to generate
  1856. # spurious warnings in gcc 4.4. I don't know if it works in 4.5.
  1857. #CFLAGS="$CFLAGS -Wlogical-op"
  1858. m4_foreach_w([warning_flag], [
  1859. -Waddress
  1860. -Waddress-of-array-temporary
  1861. -Waddress-of-temporary
  1862. -Wambiguous-macro
  1863. -Wanonymous-pack-parens
  1864. -Warc
  1865. -Warc-abi
  1866. -Warc-bridge-casts-disallowed-in-nonarc
  1867. -Warc-maybe-repeated-use-of-weak
  1868. -Warc-performSelector-leaks
  1869. -Warc-repeated-use-of-weak
  1870. -Warray-bounds
  1871. -Warray-bounds-pointer-arithmetic
  1872. -Wasm
  1873. -Wasm-operand-widths
  1874. -Watomic-properties
  1875. -Watomic-property-with-user-defined-accessor
  1876. -Wauto-import
  1877. -Wauto-storage-class
  1878. -Wauto-var-id
  1879. -Wavailability
  1880. -Wbackslash-newline-escape
  1881. -Wbad-array-new-length
  1882. -Wbind-to-temporary-copy
  1883. -Wbitfield-constant-conversion
  1884. -Wbool-conversion
  1885. -Wbool-conversions
  1886. -Wbuiltin-requires-header
  1887. -Wchar-align
  1888. -Wcompare-distinct-pointer-types
  1889. -Wcomplex-component-init
  1890. -Wconditional-type-mismatch
  1891. -Wconfig-macros
  1892. -Wconstant-conversion
  1893. -Wconstant-logical-operand
  1894. -Wconstexpr-not-const
  1895. -Wcustom-atomic-properties
  1896. -Wdangling-field
  1897. -Wdangling-initializer-list
  1898. -Wdate-time
  1899. -Wdelegating-ctor-cycles
  1900. -Wdeprecated-implementations
  1901. -Wdeprecated-register
  1902. -Wdirect-ivar-access
  1903. -Wdiscard-qual
  1904. -Wdistributed-object-modifiers
  1905. -Wdivision-by-zero
  1906. -Wdollar-in-identifier-extension
  1907. -Wdouble-promotion
  1908. -Wduplicate-decl-specifier
  1909. -Wduplicate-enum
  1910. -Wduplicate-method-arg
  1911. -Wduplicate-method-match
  1912. -Wduplicated-cond
  1913. -Wdynamic-class-memaccess
  1914. -Wembedded-directive
  1915. -Wempty-translation-unit
  1916. -Wenum-conversion
  1917. -Wexit-time-destructors
  1918. -Wexplicit-ownership-type
  1919. -Wextern-initializer
  1920. -Wextra
  1921. -Wextra-semi
  1922. -Wextra-tokens
  1923. -Wflexible-array-extensions
  1924. -Wfloat-conversion
  1925. -Wformat-non-iso
  1926. -Wfour-char-constants
  1927. -Wgcc-compat
  1928. -Wglobal-constructors
  1929. -Wgnu-array-member-paren-init
  1930. -Wgnu-designator
  1931. -Wgnu-static-float-init
  1932. -Wheader-guard
  1933. -Wheader-hygiene
  1934. -Widiomatic-parentheses
  1935. -Wignored-attributes
  1936. -Wimplicit-atomic-properties
  1937. -Wimplicit-conversion-floating-point-to-bool
  1938. -Wimplicit-exception-spec-mismatch
  1939. -Wimplicit-fallthrough
  1940. -Wimplicit-fallthrough-per-function
  1941. -Wimplicit-retain-self
  1942. -Wimport-preprocessor-directive-pedantic
  1943. -Wincompatible-library-redeclaration
  1944. -Wincompatible-pointer-types-discards-qualifiers
  1945. -Wincomplete-implementation
  1946. -Wincomplete-module
  1947. -Wincomplete-umbrella
  1948. -Winit-self
  1949. -Wint-conversions
  1950. -Wint-to-void-pointer-cast
  1951. -Winteger-overflow
  1952. -Winvalid-constexpr
  1953. -Winvalid-iboutlet
  1954. -Winvalid-noreturn
  1955. -Winvalid-pp-token
  1956. -Winvalid-source-encoding
  1957. -Winvalid-token-paste
  1958. -Wknr-promoted-parameter
  1959. -Wlarge-by-value-copy
  1960. -Wliteral-conversion
  1961. -Wliteral-range
  1962. -Wlocal-type-template-args
  1963. -Wlogical-op
  1964. -Wloop-analysis
  1965. -Wmain-return-type
  1966. -Wmalformed-warning-check
  1967. -Wmethod-signatures
  1968. -Wmicrosoft
  1969. -Wmicrosoft-exists
  1970. -Wmismatched-parameter-types
  1971. -Wmismatched-return-types
  1972. -Wmissing-field-initializers
  1973. -Wmissing-format-attribute
  1974. -Wmissing-noreturn
  1975. -Wmissing-selector-name
  1976. -Wmissing-sysroot
  1977. -Wmissing-variable-declarations
  1978. -Wmodule-conflict
  1979. -Wnested-anon-types
  1980. -Wnewline-eof
  1981. -Wnon-literal-null-conversion
  1982. -Wnon-pod-varargs
  1983. -Wnonportable-cfstrings
  1984. -Wnormalized=nfkc
  1985. -Wnull-arithmetic
  1986. -Wnull-character
  1987. -Wnull-conversion
  1988. -Wnull-dereference
  1989. -Wout-of-line-declaration
  1990. -Wover-aligned
  1991. -Woverlength-strings
  1992. -Woverride-init
  1993. -Woverriding-method-mismatch
  1994. -Wpointer-type-mismatch
  1995. -Wpredefined-identifier-outside-function
  1996. -Wprotocol-property-synthesis-ambiguity
  1997. -Wreadonly-iboutlet-property
  1998. -Wreadonly-setter-attrs
  1999. -Wreceiver-expr
  2000. -Wreceiver-forward-class
  2001. -Wreceiver-is-weak
  2002. -Wreinterpret-base-class
  2003. -Wrequires-super-attribute
  2004. -Wreserved-user-defined-literal
  2005. -Wreturn-stack-address
  2006. -Wsection
  2007. -Wselector-type-mismatch
  2008. -Wsentinel
  2009. -Wserialized-diagnostics
  2010. -Wshadow
  2011. -Wshift-count-negative
  2012. -Wshift-count-overflow
  2013. -Wshift-negative-value
  2014. -Wshift-overflow=2
  2015. -Wshift-sign-overflow
  2016. -Wshorten-64-to-32
  2017. -Wsizeof-array-argument
  2018. -Wsource-uses-openmp
  2019. -Wstatic-float-init
  2020. -Wstatic-in-inline
  2021. -Wstatic-local-in-inline
  2022. -Wstrict-overflow=1
  2023. -Wstring-compare
  2024. -Wstring-conversion
  2025. -Wstrlcpy-strlcat-size
  2026. -Wstrncat-size
  2027. -Wsuggest-attribute=format
  2028. -Wsuggest-attribute=noreturn
  2029. -Wsuper-class-method-mismatch
  2030. -Wswitch-bool
  2031. -Wsync-nand
  2032. -Wtautological-constant-out-of-range-compare
  2033. -Wtentative-definition-incomplete-type
  2034. -Wtrampolines
  2035. -Wtype-safety
  2036. -Wtypedef-redefinition
  2037. -Wtypename-missing
  2038. -Wundefined-inline
  2039. -Wundefined-internal
  2040. -Wundefined-reinterpret-cast
  2041. -Wunicode
  2042. -Wunicode-whitespace
  2043. -Wunknown-warning-option
  2044. -Wunnamed-type-template-args
  2045. -Wunneeded-member-function
  2046. -Wunsequenced
  2047. -Wunsupported-visibility
  2048. -Wunused-but-set-parameter
  2049. -Wunused-but-set-variable
  2050. -Wunused-command-line-argument
  2051. -Wunused-const-variable=2
  2052. -Wunused-exception-parameter
  2053. -Wunused-local-typedefs
  2054. -Wunused-member-function
  2055. -Wunused-sanitize-argument
  2056. -Wunused-volatile-lvalue
  2057. -Wuser-defined-literals
  2058. -Wvariadic-macros
  2059. -Wvector-conversion
  2060. -Wvector-conversions
  2061. -Wvexing-parse
  2062. -Wvisibility
  2063. -Wvla-extension
  2064. -Wzero-length-array
  2065. ], [ TOR_CHECK_CFLAGS([warning_flag]) ])
  2066. dnl We should re-enable this in some later version. Clang doesn't
  2067. dnl mind, but it causes trouble with GCC.
  2068. dnl -Wstrict-overflow=2
  2069. dnl These seem to require annotations that we don't currently use,
  2070. dnl and they give false positives in our pthreads wrappers. (Clang 4)
  2071. dnl -Wthread-safety
  2072. dnl -Wthread-safety-analysis
  2073. dnl -Wthread-safety-attributes
  2074. dnl -Wthread-safety-beta
  2075. dnl -Wthread-safety-precise
  2076. CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
  2077. CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
  2078. CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
  2079. CFLAGS="$CFLAGS -Wwrite-strings"
  2080. CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
  2081. CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
  2082. CFLAGS="$CFLAGS -Wunused-parameter "
  2083. # These interfere with building main() { return 0; }, which autoconf
  2084. # likes to use as its default program.
  2085. CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
  2086. if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
  2087. AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
  2088. fi
  2089. if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
  2090. AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
  2091. fi
  2092. if test "$tor_cv_cflags__warn_unused_const_variable_2" = "yes"; then
  2093. AC_DEFINE([HAVE_CFLAG_WUNUSED_CONST_VARIABLE], 1, [True if we have -Wunused-const-variable])
  2094. fi
  2095. if test "x$enable_fatal_warnings" = "xyes"; then
  2096. # I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
  2097. # default autoconf programs are full of errors.
  2098. CFLAGS="$CFLAGS -Werror"
  2099. fi
  2100. fi
  2101. if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
  2102. case "$host_os" in
  2103. darwin*)
  2104. 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.])
  2105. esac
  2106. fi
  2107. CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
  2108. AC_CONFIG_FILES([
  2109. Doxyfile
  2110. Makefile
  2111. config.rust
  2112. link_rust.sh
  2113. contrib/dist/suse/tor.sh
  2114. contrib/operator-tools/tor.logrotate
  2115. contrib/dist/tor.sh
  2116. contrib/dist/torctl
  2117. contrib/dist/tor.service
  2118. src/config/torrc.sample
  2119. src/config/torrc.minimal
  2120. src/rust/.cargo/config
  2121. scripts/maint/checkOptionDocs.pl
  2122. scripts/maint/updateVersions.pl
  2123. ])
  2124. if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
  2125. regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
  2126. for file in $regular_mans ; do
  2127. if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
  2128. echo "==================================";
  2129. echo;
  2130. echo "Building Tor has failed since manpages cannot be built.";
  2131. echo;
  2132. echo "You need asciidoc installed to be able to build the manpages.";
  2133. echo "To build without manpages, use the --disable-asciidoc argument";
  2134. echo "when calling configure.";
  2135. echo;
  2136. echo "==================================";
  2137. exit 1;
  2138. fi
  2139. done
  2140. fi
  2141. if test "$fragile_hardening" = "yes"; then
  2142. AC_MSG_WARN([
  2143. ============
  2144. Warning! Building Tor with --enable-fragile-hardening (also known as
  2145. --enable-expensive-hardening) makes some kinds of attacks harder, but makes
  2146. other kinds of attacks easier. A Tor instance build with this option will be
  2147. somewhat less vulnerable to remote code execution, arithmetic overflow, or
  2148. out-of-bounds read/writes... but at the cost of becoming more vulnerable to
  2149. denial of service attacks. For more information, see
  2150. https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
  2151. ============
  2152. ])
  2153. fi
  2154. AC_OUTPUT