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dnl Copyright (c) 2001-2004, Roger Dingledine
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dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
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dnl Copyright (c) 2007-2015, The Tor Project, Inc.
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dnl See LICENSE for licensing information
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AC_PREREQ([2.63])
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AC_INIT([tor],[0.2.9.2-alpha-dev])
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AC_CONFIG_SRCDIR([src/or/main.c])
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AC_CONFIG_MACRO_DIR([m4])
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# "foreign" means we don't follow GNU package layout standards
# "1.11" means we require automake version 1.11 or newer
# "subdir-objects" means put .o files in the same directory as the .c files
AM_INIT_AUTOMAKE([foreign 1.11 subdir-objects])

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m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
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AC_CONFIG_HEADERS([orconfig.h])
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AC_USE_SYSTEM_EXTENSIONS
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AC_CANONICAL_HOST

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PKG_PROG_PKG_CONFIG

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if test -f "/etc/redhat-release"; then
  if test -f "/usr/kerberos/include"; then
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    CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
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  fi
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fi
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# Not a no-op; we want to make sure that CPPFLAGS is set before we use
# the += operator on it in src/or/Makefile.am
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CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
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AC_ARG_ENABLE(openbsd-malloc,
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   AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD.  Linux only]))
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AC_ARG_ENABLE(static-openssl,
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   AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
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AC_ARG_ENABLE(static-libevent,
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   AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
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AC_ARG_ENABLE(static-zlib,
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   AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
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AC_ARG_ENABLE(static-tor,
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   AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
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AC_ARG_ENABLE(unittests,
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   AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
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AC_ARG_ENABLE(coverage,
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   AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
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AC_ARG_ENABLE(asserts-in-tests,
   AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
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AC_ARG_ENABLE(system-torrc,
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   AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
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if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
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    AC_MSG_ERROR([Can't disable assertions outside of coverage build])
fi

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AM_CONDITIONAL(UNITTESTS_ENABLED, test "x$enable_unittests" != "xno")
AM_CONDITIONAL(COVERAGE_ENABLED, test "x$enable_coverage" = "xyes")
AM_CONDITIONAL(DISABLE_ASSERTS_IN_UNIT_TESTS, test "x$enable_asserts_in_tests" = "xno")
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if test "$enable_static_tor" = "yes"; then
  enable_static_libevent="yes";
  enable_static_openssl="yes";
  enable_static_zlib="yes";
  CFLAGS="$CFLAGS -static"
fi
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if test "$enable_system_torrc" = "no"; then
  AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
            [Defined if we're not going to look for a torrc in SYSCONF])
fi

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AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
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AC_ARG_ENABLE(asciidoc,
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     AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
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     [case "${enableval}" in
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        "yes") asciidoc=true ;;
        "no")  asciidoc=false ;;
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        *) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
      esac], [asciidoc=true])

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# systemd notify support
AC_ARG_ENABLE(systemd,
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      AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
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      [case "${enableval}" in
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        "yes") systemd=true ;;
        "no")  systemd=false ;;
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        * ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
      esac], [systemd=auto])



# systemd support
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if test "x$enable_systemd" = "xno"; then
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    have_systemd=no;
else
    PKG_CHECK_MODULES(SYSTEMD,
        [libsystemd-daemon],
        have_systemd=yes,
        have_systemd=no)
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    if test "x$have_systemd" = "xno"; then
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        AC_MSG_NOTICE([Okay, checking for systemd a different way...])
        PKG_CHECK_MODULES(SYSTEMD,
            [libsystemd],
            have_systemd=yes,
            have_systemd=no)
    fi
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fi

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if test "x$have_systemd" = "xyes"; then
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    AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
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    TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
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    TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
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    PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
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         [AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
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fi
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AC_SUBST(TOR_SYSTEMD_CFLAGS)
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AC_SUBST(TOR_SYSTEMD_LIBS)

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if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
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    AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
fi

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case "$host" in
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   *-*-solaris* )
     AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
     ;;
esac

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AC_ARG_ENABLE(gcc-warnings,
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     AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
AC_ARG_ENABLE(fatal-warnings,
     AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
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AC_ARG_ENABLE(gcc-warnings-advisory,
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     AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
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dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
AC_ARG_ENABLE(gcc-hardening,
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    AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
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AC_ARG_ENABLE(expensive-hardening,
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    AS_HELP_STRING(--enable-expensive-hardening, [enable more expensive compiler hardening; makes Tor slower]))
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dnl Linker hardening options
dnl Currently these options are ELF specific - you can't use this with MacOSX
AC_ARG_ENABLE(linker-hardening,
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    AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
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AC_ARG_ENABLE(local-appdata,
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   AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
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if test "$enable_local_appdata" = "yes"; then
  AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
            [Defined if we default to host local appdata paths on Windows])
fi

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# Tor2web mode flag
AC_ARG_ENABLE(tor2web-mode,
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     AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
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[if test "x$enableval" = "xyes"; then
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    CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
fi])

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AC_ARG_ENABLE(tool-name-check,
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     AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
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AC_ARG_ENABLE(seccomp,
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     AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
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AC_ARG_ENABLE(libscrypt,
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     AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
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dnl check for the correct "ar" when cross-compiling
AN_MAKEVAR([AR], [AC_PROG_AR])
AN_PROGRAM([ar], [AC_PROG_AR])
AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [ar])])
AC_PROG_AR

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dnl Check whether the above macro has settled for a simply named tool even
dnl though we're cross compiling. We must do this before running AC_PROG_CC,
dnl because that will find any cc on the system, not only the cross-compiler,
dnl and then verify that a binary built with this compiler runs on the
dnl build system. It will then come to the false conclusion that we're not
dnl cross-compiling.
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if test "x$enable_tool_name_check" != "xno"; then
    if test "x$ac_tool_warned" = "xyes"; then
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        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.)])
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	elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
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		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.)])
	fi
fi

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AC_PROG_CC
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AC_PROG_CPP
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AC_PROG_MAKE_SET
AC_PROG_RANLIB
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AC_PATH_PROG([PERL], [perl])

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dnl autoconf 2.59 appears not to support AC_PROG_SED
AC_CHECK_PROG([SED],[sed],[sed],[/bin/false])
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dnl check for asciidoc and a2x
AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
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AC_PATH_PROGS([A2X], [a2x a2x.py], none)
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AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
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AM_CONDITIONAL(USE_FW_HELPER, test "x$natpmp" = "xtrue" || test "x$upnp" = "xtrue")
AM_CONDITIONAL(NAT_PMP, test "x$natpmp" = "xtrue")
AM_CONDITIONAL(MINIUPNPC, test "x$upnp" = "xtrue")
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AM_PROG_CC_C_O
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AC_PROG_CC_C99
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AC_ARG_VAR([PYTHON], [path to Python binary])
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AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
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if test "x$PYTHON" = "x"; then
  AC_MSG_WARN([Python unavailable; some tests will not be run.])
fi
AM_CONDITIONAL(USEPYTHON, [test "x$PYTHON" != "x"])

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ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
AC_C_FLEXIBLE_ARRAY_MEMBER
], [
 dnl Maybe we've got an old autoconf...
 AC_CACHE_CHECK([for flexible array members],
     tor_cv_c_flexarray,
     [AC_COMPILE_IFELSE(
       AC_LANG_PROGRAM([
 struct abc { int a; char b[]; };
], [
 struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
 def->b[0] = 33;
]),
  [tor_cv_c_flexarray=yes],
  [tor_cv_c_flexarray=no])])
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 if test "$tor_cv_flexarray" = "yes"; then
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   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
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 else
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   AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
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 fi
])

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AC_CACHE_CHECK([for working C99 mid-block declaration syntax],
      tor_cv_c_c99_decl,
      [AC_COMPILE_IFELSE(
         [AC_LANG_PROGRAM([], [int x; x = 3; int y; y = 4 + x;])],
	 [tor_cv_c_c99_decl=yes],
	 [tor_cv_c_c99_decl=no] )])
if test "$tor_cv_c_c99_decl" != "yes"; then
  AC_MSG_ERROR([Your compiler doesn't support c99 mid-block declarations. This is required as of Tor 0.2.6.x])
fi

AC_CACHE_CHECK([for working C99 designated initializers],
      tor_cv_c_c99_designated_init,
      [AC_COMPILE_IFELSE(
         [AC_LANG_PROGRAM([struct s { int a; int b; };],
  	       [[ struct s ss = { .b = 5, .a = 6 }; ]])],
	 [tor_cv_c_c99_designated_init=yes],
	 [tor_cv_c_c99_designated_init=no] )])

if test "$tor_cv_c_c99_designated_init" != "yes"; then
  AC_MSG_ERROR([Your compiler doesn't support c99 designated initializers. This is required as of Tor 0.2.6.x])
fi

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TORUSER=_tor
AC_ARG_WITH(tor-user,
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        AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
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        [
           TORUSER=$withval
        ]
)
AC_SUBST(TORUSER)

TORGROUP=_tor
AC_ARG_WITH(tor-group,
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        AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
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        [
           TORGROUP=$withval
        ]
)
AC_SUBST(TORGROUP)

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dnl If _WIN32 is defined and non-zero, we are building for win32
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AC_MSG_CHECKING([for win32])
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AC_RUN_IFELSE([AC_LANG_SOURCE([
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int main(int c, char **v) {
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#ifdef _WIN32
#if _WIN32
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  return 0;
#else
  return 1;
#endif
#else
  return 2;
#endif
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}])],
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bwin32=true; AC_MSG_RESULT([yes]),
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bwin32=false; AC_MSG_RESULT([no]),
bwin32=cross; AC_MSG_RESULT([cross])
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)

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if test "$bwin32" = "cross"; then
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AC_MSG_CHECKING([for win32 (cross)])
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AC_COMPILE_IFELSE([AC_LANG_SOURCE([
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#ifdef _WIN32
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int main(int c, char **v) {return 0;}
#else
#error
int main(int c, char **v) {return x(y);}
#endif
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])],
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bwin32=true; AC_MSG_RESULT([yes]),
bwin32=false; AC_MSG_RESULT([no]))
fi

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AH_BOTTOM([
#ifdef _WIN32
/* Defined to access windows functions and definitions for >=WinXP */
# ifndef WINVER
#  define WINVER 0x0501
# endif

/* Defined to access _other_ windows functions and definitions for >=WinXP */
# ifndef _WIN32_WINNT
#  define _WIN32_WINNT 0x0501
# endif

/* Defined to avoid including some windows headers as part of Windows.h */
# ifndef WIN32_LEAN_AND_MEAN
#  define WIN32_LEAN_AND_MEAN 1
# endif
#endif
])

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AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
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dnl Enable C99 when compiling with MIPSpro
AC_MSG_CHECKING([for MIPSpro compiler])
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
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#if (defined(__sgi) && defined(_COMPILER_VERSION))
#error
  return x(y);
#endif
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])],
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bmipspro=false; AC_MSG_RESULT(no),
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bmipspro=true; AC_MSG_RESULT(yes))
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if test "$bmipspro" = "true"; then
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  CFLAGS="$CFLAGS -c99"
fi

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AC_C_BIGENDIAN

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AC_SEARCH_LIBS(socket, [socket network])
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AC_SEARCH_LIBS(gethostbyname, [nsl])
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AC_SEARCH_LIBS(dlopen, [dl])
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AC_SEARCH_LIBS(inet_aton, [resolv])
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AC_SEARCH_LIBS(backtrace, [execinfo])
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saved_LIBS="$LIBS"
AC_SEARCH_LIBS([clock_gettime], [rt])
if test "$LIBS" != "$saved_LIBS"; then
   # Looks like we need -lrt for clock_gettime().
   have_rt=yes
fi
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AC_SEARCH_LIBS(pthread_create, [pthread])
AC_SEARCH_LIBS(pthread_detach, [pthread])
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AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
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AC_CHECK_FUNCS(
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        _NSGetEnviron \
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	RtlSecureZeroMemory \
	SecureZeroMemory \
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        accept4 \
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        backtrace \
        backtrace_symbols_fd \
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        clock_gettime \
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	eventfd \
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	explicit_bzero \
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	timingsafe_memcmp \
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        flock \
        ftime \
        getaddrinfo \
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        getentropy \
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        getifaddrs \
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        getpass \
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        getrlimit \
        gettimeofday \
        gmtime_r \
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	htonll \
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        inet_aton \
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        ioctl \
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        issetugid \
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        llround \
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        localtime_r \
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        lround \
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        memmem \
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        memset_s \
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	pipe \
	pipe2 \
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        prctl \
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	readpassphrase \
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        rint \
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        sigaction \
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        socketpair \
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	statvfs \
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        strlcat \
        strlcpy \
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	strnlen \
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        strptime \
        strtok_r \
        strtoull \
        sysconf \
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	sysctl \
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	truncate \
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        uname \
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	usleep \
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        vasprintf \
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	_vscprintf
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)
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if test "$bwin32" != "true"; then
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  AC_CHECK_HEADERS(pthread.h)
  AC_CHECK_FUNCS(pthread_create)
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  AC_CHECK_FUNCS(pthread_condattr_setclock)
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fi

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if test "$bwin32" = "true"; then
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  AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
#include <windows.h>
#include <conio.h>
#include <wchar.h>
                 ])
fi

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AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
  test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
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dnl ------------------------------------------------------
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dnl Where do you live, libevent?  And how do we call you?
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if test "$bwin32" = "true"; then
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  TOR_LIB_WS32=-lws2_32
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  TOR_LIB_IPHLPAPI=-liphlpapi
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  # Some of the cargo-cults recommend -lwsock32 as well, but I don't
  # think it's actually necessary.
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  TOR_LIB_GDI=-lgdi32
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else
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  TOR_LIB_WS32=
  TOR_LIB_GDI=
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fi
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AC_SUBST(TOR_LIB_WS32)
AC_SUBST(TOR_LIB_GDI)
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AC_SUBST(TOR_LIB_IPHLPAPI)
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tor_libevent_pkg_redhat="libevent"
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tor_libevent_pkg_debian="libevent-dev"
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tor_libevent_devpkg_redhat="libevent-devel"
tor_libevent_devpkg_debian="libevent-dev"

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dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
dnl linking for static builds.
STATIC_LIBEVENT_FLAGS=""
if test "$enable_static_libevent" = "yes"; then
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    if test "$have_rt" = "yes"; then
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      STATIC_LIBEVENT_FLAGS=" -lrt "
    fi
fi

TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
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#ifdef _WIN32
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#include <winsock2.h>
#endif
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#include <sys/time.h>
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#include <sys/types.h>
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#include <event2/event.h>], [
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#ifdef _WIN32
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#include <winsock2.h>
#endif
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void *event_init(void);],
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    [
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#ifdef _WIN32
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{WSADATA d; WSAStartup(0x101,&d); }
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#endif
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event_init();
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], [--with-libevent-dir], [/opt/libevent])
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dnl Now check for particular libevent functions.
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save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
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save_CPPFLAGS="$CPPFLAGS"
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LIBS="-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $LIBS"
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LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
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CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
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AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
                evutil_secure_rng_add_bytes \
])
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LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
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if test "$enable_static_libevent" = "yes"; then
   if test "$tor_cv_library_libevent_dir" = "(system)"; then
     AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
   else
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     TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
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   fi
else
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     if test "x$ac_cv_header_event2_event_h" = "xyes"; then
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       AC_SEARCH_LIBS(event_new, [event event_core], , AC_MSG_ERROR("libevent2 is installed but linking it failed while searching for event_new"))
       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"))
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       if test "$ac_cv_search_event_new" != "none required"; then
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         TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
       fi
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       if test "$ac_cv_search_evdns_base_new" != "none required"; then
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         TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
       fi
     else
       TOR_LIBEVENT_LIBS="-levent"
     fi
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fi

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LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

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dnl Check that libevent is at least at version 2.0.10, the first stable
dnl release of its series
CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
AC_MSG_CHECKING([whether Libevent is new enough])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
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#include <event2/event.h>
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#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
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#error
int x = y(zz);
#else
int x = 1;
#endif
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])], [ AC_MSG_RESULT([yes]) ],
   [ AC_MSG_RESULT([no])
     AC_MSG_ERROR([Libevent is not new enough.  We require 2.0.10-stable or later]) ] )

LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

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AC_SUBST(TOR_LIBEVENT_LIBS)
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dnl ------------------------------------------------------
dnl Where do you live, libm?

dnl On some platforms (Haiku/BeOS) the math library is
dnl part of libroot. In which case don't link against lm
TOR_LIB_MATH=""
save_LIBS="$LIBS"
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AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
if test "$ac_cv_search_pow" != "none required"; then
    TOR_LIB_MATH="$ac_cv_search_pow"
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fi
LIBS="$save_LIBS"
AC_SUBST(TOR_LIB_MATH)

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dnl ------------------------------------------------------
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dnl Where do you live, openssl?  And how do we call you?
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tor_openssl_pkg_redhat="openssl"
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tor_openssl_pkg_debian="libssl-dev"
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tor_openssl_devpkg_redhat="openssl-devel"
tor_openssl_devpkg_debian="libssl-dev"

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ALT_openssl_WITHVAL=""
AC_ARG_WITH(ssl-dir,
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  AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
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  [
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      if test "x$withval" != "xno" && test "x$withval" != "x"; then
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         ALT_openssl_WITHVAL="$withval"
      fi
  ])

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TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
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    [#include <openssl/rand.h>],
    [void RAND_add(const void *buf, int num, double entropy);],
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    [RAND_add((void*)0,0,0);], [],
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    [/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
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dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()

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if test "$enable_static_openssl" = "yes"; then
   if test "$tor_cv_library_openssl_dir" = "(system)"; then
     AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
   else
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     TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
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   fi
else
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     TOR_OPENSSL_LIBS="-lssl -lcrypto"
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fi
AC_SUBST(TOR_OPENSSL_LIBS)

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dnl Now check for particular openssl functions.
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
save_CPPFLAGS="$CPPFLAGS"
LIBS="$TOR_OPENSSL_LIBS $LIBS"
LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
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AC_TRY_COMPILE([
#include <openssl/opensslv.h>
#if OPENSSL_VERSION_NUMBER < 0x1000000fL
#error "too old"
#endif
   ], [],
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   [ : ],
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   [ AC_ERROR([OpenSSL is too old. We require 1.0.0 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])

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AC_TRY_COMPILE([
#include <openssl/opensslv.h>
#include <openssl/evp.h>
#if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
#error "no ECC"
#endif
#if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
#error "curves unavailable"
#endif
   ], [],
   [ : ],
   [ AC_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.]) ])

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AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
[#include <openssl/ssl.h>
])

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AC_CHECK_FUNCS([ \
		SSL_SESSION_get_master_key \
		SSL_get_server_random \
                SSL_get_client_ciphers \
                SSL_get_client_random \
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		SSL_CIPHER_find \
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		TLS_method
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	       ])
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dnl Check if OpenSSL has scrypt implementation.
AC_CHECK_FUNCS([ EVP_PBE_scrypt ])

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LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"

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dnl ------------------------------------------------------
dnl Where do you live, zlib?  And how do we call you?

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tor_zlib_pkg_redhat="zlib"
tor_zlib_pkg_debian="zlib1g"
tor_zlib_devpkg_redhat="zlib-devel"
tor_zlib_devpkg_debian="zlib1g-dev"
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TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
    [#include <zlib.h>],
    [const char * zlibVersion(void);],
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    [zlibVersion();], [--with-zlib-dir],
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    [/opt/zlib])

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if test "$enable_static_zlib" = "yes"; then
   if test "$tor_cv_library_zlib_dir" = "(system)"; then
     AC_MSG_ERROR("You must specify an explicit --with-zlib-dir=x option when
 using --enable-static-zlib")
   else
     TOR_ZLIB_LIBS="$TOR_LIBDIR_zlib/libz.a"
   fi
else
     TOR_ZLIB_LIBS="-lz"
fi
AC_SUBST(TOR_ZLIB_LIBS)

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dnl ----------------------------------------------------------------------
dnl Check if libcap is available for capabilities.

tor_cap_pkg_debian="libcap2"
tor_cap_pkg_redhat="libcap"
tor_cap_devpkg_debian="libcap-dev"
tor_cap_devpkg_redhat="libcap-devel"

AC_CHECK_LIB([cap], [cap_init], [],
  AC_MSG_NOTICE([Libcap was not found. Capabilities will not be usable.])
)
AC_CHECK_FUNCS(cap_set_proc)

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dnl ---------------------------------------------------------------------
dnl Now that we know about our major libraries, we can check for compiler
dnl and linker hardening options.  We need to do this with the libraries known,
dnl since sometimes the linker will like an option but not be willing to
dnl use it with a build of a library.
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all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
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all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
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CFLAGS_FTRAPV=
CFLAGS_FWRAPV=
CFLAGS_ASAN=
CFLAGS_UBSAN=

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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
#if !defined(__clang__)
#error
#endif])], have_clang=yes, have_clang=no)

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if test "x$enable_gcc_hardening" != "xno"; then
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    CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
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    if test "x$have_clang" = "xyes"; then
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        TOR_CHECK_CFLAGS(-Qunused-arguments)
    fi
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    TOR_CHECK_CFLAGS(-fstack-protector-all, also_link)
    AS_VAR_PUSHDEF([can_compile], [tor_cv_cflags_-fstack-protector-all])
    AS_VAR_PUSHDEF([can_link], [tor_can_link_-fstack-protector-all])
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m4_ifdef([AS_VAR_IF],[
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    AS_VAR_IF(can_compile, [yes],
        AS_VAR_IF(can_link, [yes],
                  [],
                  AC_MSG_ERROR([We tried to build with stack protection; it looks like your compiler supports it but your libc does not provide it. Are you missing libssp? (You can --disable-gcc-hardening to ignore this error.)]))
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        )])
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    AS_VAR_POPDEF([can_link])
    AS_VAR_POPDEF([can_compile])
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    TOR_CHECK_CFLAGS(-Wstack-protector)
    TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
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    if test "$bwin32" = "false"; then
       TOR_CHECK_CFLAGS(-fPIE)
       TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
    fi
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    TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", true)
    TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
    if test "$tor_cv_cflags__ftrapv" = "yes" && test "$tor_can_link__ftrapv" != "yes"; then
      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.])
    fi
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fi
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if test "x$enable_expensive_hardening" = "xyes"; then
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   if test "$tor_cv_cflags__ftrapv" != "yes"; then
     AC_MSG_ERROR([You requested expensive hardening, but the compiler does not seem to support -ftrapv.])
   fi

   TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
    if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
      AC_MSG_ERROR([The compiler supports -fsanitize=address, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libubsan.so, and with Clang you need libclang_rt.ubsan*])
    fi

   TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=undefined], also_link, CFLAGS_UBSAN="-fsanitize=undefined", true)
    if test "$tor_cv_cflags__fsanitize_address" = "yes" && test "$tor_can_link__fsanitize_address" != "yes"; then
      AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
    fi

TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
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fi

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CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"

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mulodi_fixes_ftrapv=no
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if test "$have_clang" = "yes"; then
  saved_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
  AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
  AC_LINK_IFELSE([
      AC_LANG_SOURCE([[
          #include <stdint.h>
          #include <stdlib.h>
	  int main(int argc, char **argv)
	  {
            int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
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	                * (int64_t)atoi(argv[3]);
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	    return x == 9;
	  } ]])],
	  [ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
	  [ftrapv_can_link=no; AC_MSG_RESULT([no])])
  if test "$ftrapv_can_link" = "no"; then
    AC_MSG_CHECKING([whether defining __mulodi4 fixes that])
    AC_LINK_IFELSE([
      AC_LANG_SOURCE([[
          #include <stdint.h>
          #include <stdlib.h>
	  int64_t __mulodi4(int64_t a, int64_t b, int *overflow) {
             *overflow=0;
	     return a;
          }
	  int main(int argc, char **argv)
	  {
            int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
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	                * (int64_t)atoi(argv[3]);
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	    return x == 9;
	  } ]])],
	  [mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
	  [mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
  fi
  CFLAGS="$saved_CFLAGS"
fi

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AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")

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dnl These cflags add bunches of branches, and we haven't been able to
dnl persuade ourselves that they're suitable for code that needs to be
dnl constant time.
AC_SUBST(CFLAGS_BUGTRAP)
dnl These cflags are variant ones sutable for code that needs to be
dnl constant-time.
AC_SUBST(CFLAGS_CONSTTIME)

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    TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
fi
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# For backtrace support
TOR_CHECK_LDFLAGS(-rdynamic)

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dnl ------------------------------------------------------
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dnl Now see if we have a -fomit-frame-pointer compiler option.

saved_CFLAGS="$CFLAGS"
TOR_CHECK_CFLAGS(-fomit-frame-pointer)
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  if test "x$enable_expensive_hardening" != "xyes"; then
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    F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
  fi
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fi
CFLAGS="$saved_CFLAGS"
AC_SUBST(F_OMIT_FRAME_POINTER)

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dnl ------------------------------------------------------
dnl If we are adding -fomit-frame-pointer (or if the compiler's doing it
dnl for us, as GCC 4.6 and later do at many optimization levels), then
dnl we should try to add -fasynchronous-unwind-tables so that our backtrace
dnl code will work.
TOR_CHECK_CFLAGS(-fasynchronous-unwind-tables)

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dnl ============================================================
dnl Check for libseccomp

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if test "x$enable_seccomp" != "xno"; then
  AC_CHECK_HEADERS([seccomp.h])
  AC_SEARCH_LIBS(seccomp_init, [seccomp])
fi
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dnl ============================================================
dnl Check for libscrypt

if test "x$enable_libscrypt" != "xno"; then
  AC_CHECK_HEADERS([libscrypt.h])
  AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
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  AC_CHECK_FUNCS([libscrypt_scrypt])
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fi

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dnl ============================================================
dnl We need an implementation of curve25519.

dnl set these defaults.
build_curve25519_donna=no
build_curve25519_donna_c64=no
use_curve25519_donna=no
use_curve25519_nacl=no
CURVE25519_LIBS=

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dnl The best choice is using curve25519-donna-c64, but that requires
dnl that we
AC_CACHE_CHECK([whether we can use curve25519-donna-c64],
  tor_cv_can_use_curve25519_donna_c64,
  [AC_RUN_IFELSE(
    [AC_LANG_PROGRAM([dnl
      #include <stdint.h>
      typedef unsigned uint128_t __attribute__((mode(TI)));
  int func(uint64_t a, uint64_t b) {
           uint128_t c = ((uint128_t)a) * b;
           int ok = ((uint64_t)(c>>96)) == 522859 &&
             (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
                 (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
                 (((uint64_t)(c))&0xffffffffL) == 0;
           return ok;
      }
  ], [dnl
    int ok = func( ((uint64_t)2000000000) * 1000000000,
                   ((uint64_t)1234567890) << 24);
        return !ok;
      ])],
  [tor_cv_can_use_curve25519_donna_c64=yes],
      [tor_cv_can_use_curve25519_donna_c64=no],
  [AC_LINK_IFELSE(
        [AC_LANG_PROGRAM([dnl
      #include <stdint.h>
      typedef unsigned uint128_t __attribute__((mode(TI)));
  int func(uint64_t a, uint64_t b) {
           uint128_t c = ((uint128_t)a) * b;
           int ok = ((uint64_t)(c>>96)) == 522859 &&
             (((uint64_t)(c>>64))&0xffffffffL) == 3604448702L &&
                 (((uint64_t)(c>>32))&0xffffffffL) == 2351960064L &&
                 (((uint64_t)(c))&0xffffffffL) == 0;
           return ok;
      }
  ], [dnl
    int ok = func( ((uint64_t)2000000000) * 1000000000,
    	         ((uint64_t)1234567890) << 24);
        return !ok;
      ])],
          [tor_cv_can_use_curve25519_donna_c64=cross],
      [tor_cv_can_use_curve25519_donna_c64=no])])])

AC_CHECK_HEADERS([crypto_scalarmult_curve25519.h \
                  nacl/crypto_scalarmult_curve25519.h])

AC_CACHE_CHECK([for nacl compiled with a fast curve25519 implementation],
  tor_cv_can_use_curve25519_nacl,
  [tor_saved_LIBS="$LIBS"
   LIBS="$LIBS -lnacl"
   AC_LINK_IFELSE(
     [AC_LANG_PROGRAM([dnl
       #ifdef HAVE_CRYPTO_SCALARMULT_CURVE25519_H
       #include <crypto_scalarmult_curve25519.h>
   #elif defined(HAVE_NACL_CRYPTO_SCALARMULT_CURVE25519_H)
   #include <nacl/crypto_scalarmult_curve25519.h>
   #endif
       #ifdef crypto_scalarmult_curve25519_ref_BYTES
   #error Hey, this is the reference implementation! That's not fast.
   #endif
     ], [
   unsigned char *a, *b, *c; crypto_scalarmult_curve25519(a,b,c);
     ])], [tor_cv_can_use_curve25519_nacl=yes],
     [tor_cv_can_use_curve25519_nacl=no])
   LIBS="$tor_saved_LIBS" ])

 dnl Okay, now we need to figure out which one to actually use. Fall back
 dnl to curve25519-donna.c

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   build_curve25519_donna_c64=yes
   use_curve25519_donna=yes
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   use_curve25519_nacl=yes
   CURVE25519_LIBS=-lnacl
 else
   build_curve25519_donna=yes
   use_curve25519_donna=yes
 fi
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  AC_DEFINE(USE_CURVE25519_DONNA, 1,
            [Defined if we should use an internal curve25519_donna{,_c64} implementation])
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  AC_DEFINE(USE_CURVE25519_NACL, 1,
            [Defined if we should use a curve25519 from nacl])
fi
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AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
  test "x$build_curve25519_donna" = "xyes")
AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
  test "x$build_curve25519_donna_c64" = "xyes")
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AC_SUBST(CURVE25519_LIBS)

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dnl Make sure to enable support for large off_t if available.
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AC_SYS_LARGEFILE

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                  errno.h \
                  fcntl.h \
                  signal.h \
                  string.h \
                  sys/capability.h \
                  sys/fcntl.h \
                  sys/stat.h \
                  sys/time.h \
                  sys/types.h \
                  time.h \
                  unistd.h \
                  arpa/inet.h \
                  crt_externs.h \
                  execinfo.h \
                  grp.h \
                  ifaddrs.h \
                  inttypes.h \
                  limits.h \
                  linux/types.h \
                  machine/limits.h \
                  malloc.h \
                  malloc/malloc.h \
                  malloc_np.h \
                  netdb.h \
                  netinet/in.h \
                  netinet/in6.h \
                  pwd.h \
                  readpassphrase.h \
                  stdint.h \
                  sys/eventfd.h \
                  sys/file.h \
                  sys/ioctl.h \
                  sys/limits.h \
                  sys/mman.h \
                  sys/param.h \
                  sys/prctl.h \
                  sys/resource.h \
                  sys/select.h \
                  sys/socket.h \
                  sys/statvfs.h \
                  sys/syscall.h \
                  sys/sysctl.h \
                  sys/syslimits.h \
                  sys/time.h \
                  sys/types.h \
                  sys/un.h \
                  sys/utime.h \
                  sys/wait.h \
                  syslog.h \
                  utime.h])
1014

1015
1016
AC_CHECK_HEADERS(sys/param.h)

1017
AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
1018
1019
1020
1021
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
1022
1023
#include <sys/socket.h>
#endif])
1024
AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
1025
1026
1027
1028
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
1029
#include <sys/socket.h>
1030
1031
1032
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
1033
1034
1035
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
1036
#endif])
1037
1038
1039
1040
1041
1042
1043
1044

AC_CHECK_HEADERS(linux/if.h,[],[],
[
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
])

1045
AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
1046
        linux_netfilter_ipv4=1, linux_netfilter_ipv4=0,
1047
1048
1049
1050
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
1051
#include <sys/socket.h>
1052
#endif
1053
1054
1055
1056
1057
1058
1059
1060
1061
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifdef HAVE_LINUX_TYPES_H
#include <linux/types.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
1062
1063
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
1064
#endif])
1065

1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
AC_CHECK_HEADERS(linux/netfilter_ipv6/ip6_tables.h,
        linux_netfilter_ipv6_ip6_tables=1, linux_netfilter_ipv6_ip6_tables=0,
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifdef HAVE_LINUX_TYPES_H
#include <linux/types.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_LINUX_IF_H
#include <linux/if.h>
#endif])

1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
transparent_ok=0
if test "x$net_if_found" = "x1" && test "x$net_pfvar_found" = "x1"; then
  transparent_ok=1
fi
if test "x$linux_netfilter_ipv4" = "x1"; then
  transparent_ok=1
fi
if test "x$linux_netfilter_ipv6_ip6_tables" = "x1"; then
  transparent_ok=1
fi
if test "x$transparent_ok" = "x1"; then
  AC_DEFINE(USE_TRANSPARENT, 1, "Define to enable transparent proxy support")
  case "$host" in
    *-*-openbsd* | *-*-bitrig*)
      AC_DEFINE(OPENBSD, 1, "Define to handle pf on OpenBSD properly") ;;
  esac
else
  AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
1108
1109
fi

1110
1111
1112
1113
1114
1115
1116
AC_CHECK_MEMBERS([struct timeval.tv_sec], , ,
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif])
1117

1118
1119
1120
dnl In case we aren't given a working stdint.h, we'll need to grow our own.
dnl Watch out.

1121
1122
1123
1124
1125
1126
1127
1128
AC_CHECK_SIZEOF(int8_t)
AC_CHECK_SIZEOF(int16_t)
AC_CHECK_SIZEOF(int32_t)
AC_CHECK_SIZEOF(int64_t)
AC_CHECK_SIZEOF(uint8_t)
AC_CHECK_SIZEOF(uint16_t)
AC_CHECK_SIZEOF(uint32_t)
AC_CHECK_SIZEOF(uint64_t)
1129
1130
AC_CHECK_SIZEOF(intptr_t)
AC_CHECK_SIZEOF(uintptr_t)
1131

1132
dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
1133

1134
1135
1136
1137
1138
1139
AC_CHECK_SIZEOF(char)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)
AC_CHECK_SIZEOF(__int64)
1140
AC_CHECK_SIZEOF(void *)
1141
AC_CHECK_SIZEOF(time_t)
1142
AC_CHECK_SIZEOF(size_t)
1143
AC_CHECK_SIZEOF(pid_t)
1144

1145
AC_CHECK_TYPES([uint, u_char, ssize_t])
1146

1147
AC_PC_FROM_UCONTEXT([:])
1148

1149
1150
dnl used to include sockaddr_storage, but everybody has that.
AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
1151
1152
1153
1154
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
1155
1156
1157
1158
1159
1160
1161
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
1162
#endif
1163
#ifdef _WIN32
1164
#define _WIN32_WINNT 0x0501
1165
1166
1167
1168
1169
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
])
1170
AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
1183
#ifdef _WIN32
1184
#define _WIN32_WINNT 0x0501
1185
1186
1187
1188
1189
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
])
1190

1191
AC_CHECK_TYPES([rlim_t], , ,
1192
1193
1194
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif