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tor/configure.ac
cypherpunks bfe740f065 Refactor retrieving the current working directory 
The GNU C Library (glibc) offers an function which allocates the
necessary memory automatically [0]. When it is available, we use that.

Otherwise we depend upon the `getcwd` function which requires a
preallocated buffer (and its size). This function was used incorrectly
by depending on the initial buffer size being big enough and otherwise
failing to return the current working directory. The proper way of
getting the current working directory requires a loop which doubles the
buffer size if `getcwd` requires it. This code was copied from [1] with
modifications to fit the context.

[0] https://www.gnu.org/software/hurd/hurd/porting/guidelines.html
[1] http://pubs.opengroup.org/onlinepubs/9699919799/functions/getcwd.html
2017-08-04 12:22:53 -04:00

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dnl Copyright (c) 2001-2004, Roger Dingledine
dnl Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson
dnl Copyright (c) 2007-2017, The Tor Project, Inc.
dnl See LICENSE for licensing information
AC_PREREQ([2.63])
AC_INIT([tor],[0.3.2.0-alpha-dev])
AC_CONFIG_SRCDIR([src/or/main.c])
AC_CONFIG_MACRO_DIR([m4])
# "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 -Wall -Werror])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
AC_CONFIG_HEADERS([orconfig.h])
AC_USE_SYSTEM_EXTENSIONS
AC_CANONICAL_HOST
PKG_PROG_PKG_CONFIG
if test -f "/etc/redhat-release"; then
if test -f "/usr/kerberos/include"; then
CPPFLAGS="$CPPFLAGS -I/usr/kerberos/include"
fi
fi
# Not a no-op; we want to make sure that CPPFLAGS is set before we use
# the += operator on it in src/or/Makefile.am
CPPFLAGS="$CPPFLAGS -I\${top_srcdir}/src/common"
AC_ARG_ENABLE(openbsd-malloc,
AS_HELP_STRING(--enable-openbsd-malloc, [use malloc code from OpenBSD. Linux only]))
AC_ARG_ENABLE(static-openssl,
AS_HELP_STRING(--enable-static-openssl, [link against a static openssl library. Requires --with-openssl-dir]))
AC_ARG_ENABLE(static-libevent,
AS_HELP_STRING(--enable-static-libevent, [link against a static libevent library. Requires --with-libevent-dir]))
AC_ARG_ENABLE(static-zlib,
AS_HELP_STRING(--enable-static-zlib, [link against a static zlib library. Requires --with-zlib-dir]))
AC_ARG_ENABLE(static-tor,
AS_HELP_STRING(--enable-static-tor, [create an entirely static Tor binary. Requires --with-openssl-dir and --with-libevent-dir and --with-zlib-dir]))
AC_ARG_ENABLE(unittests,
AS_HELP_STRING(--disable-unittests, [don't build unit tests for Tor. Risky!]))
AC_ARG_ENABLE(coverage,
AS_HELP_STRING(--enable-coverage, [enable coverage support in the unit-test build]))
AC_ARG_ENABLE(asserts-in-tests,
AS_HELP_STRING(--disable-asserts-in-tests, [disable tor_assert() calls in the unit tests, for branch coverage]))
AC_ARG_ENABLE(system-torrc,
AS_HELP_STRING(--disable-system-torrc, [don't look for a system-wide torrc file]))
AC_ARG_ENABLE(libfuzzer,
AS_HELP_STRING(--enable-libfuzzer, [build extra fuzzers based on 'libfuzzer']))
AC_ARG_ENABLE(oss-fuzz,
AS_HELP_STRING(--enable-oss-fuzz, [build extra fuzzers based on 'oss-fuzz' environment]))
AC_ARG_ENABLE(memory-sentinels,
AS_HELP_STRING(--disable-memory-sentinels, [disable code that tries to prevent some kinds of memory access bugs. For fuzzing only.]))
AC_ARG_ENABLE(rust,
AS_HELP_STRING(--enable-rust, [enable rust integration]))
AC_ARG_ENABLE(cargo-online-mode,
AS_HELP_STRING(--enable-cargo-online-mode, [Allow cargo to make network requests to fetch crates. For builds with rust only.]))
if test "x$enable_coverage" != "xyes" -a "x$enable_asserts_in_tests" = "xno" ; then
AC_MSG_ERROR([Can't disable assertions outside of coverage build])
fi
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$enable_asserts_in_tests" = "xno")
AM_CONDITIONAL(LIBFUZZER_ENABLED, test "x$enable_libfuzzer" = "xyes")
AM_CONDITIONAL(OSS_FUZZ_ENABLED, test "x$enable_oss_fuzz" = "xyes")
AM_CONDITIONAL(USE_RUST, test "x$enable_rust" = "xyes")
if test "$enable_static_tor" = "yes"; then
enable_static_libevent="yes";
enable_static_openssl="yes";
enable_static_zlib="yes";
CFLAGS="$CFLAGS -static"
fi
if test "$enable_system_torrc" = "no"; then
AC_DEFINE(DISABLE_SYSTEM_TORRC, 1,
[Defined if we're not going to look for a torrc in SYSCONF])
fi
if test "$enable_memory_sentinels" = "no"; then
AC_DEFINE(DISABLE_MEMORY_SENTINELS, 1,
[Defined if we're turning off memory safety code to look for bugs])
fi
AM_CONDITIONAL(USE_OPENBSD_MALLOC, test "x$enable_openbsd_malloc" = "xyes")
AC_ARG_ENABLE(asciidoc,
AS_HELP_STRING(--disable-asciidoc, [don't use asciidoc (disables building of manpages)]),
[case "${enableval}" in
"yes") asciidoc=true ;;
"no") asciidoc=false ;;
*) AC_MSG_ERROR(bad value for --disable-asciidoc) ;;
esac], [asciidoc=true])
# systemd notify support
AC_ARG_ENABLE(systemd,
AS_HELP_STRING(--enable-systemd, [enable systemd notification support]),
[case "${enableval}" in
"yes") systemd=true ;;
"no") systemd=false ;;
* ) AC_MSG_ERROR(bad value for --enable-systemd) ;;
esac], [systemd=auto])
# systemd support
if test "x$enable_systemd" = "xno"; then
have_systemd=no;
else
PKG_CHECK_MODULES(SYSTEMD,
[libsystemd-daemon],
have_systemd=yes,
have_systemd=no)
if test "x$have_systemd" = "xno"; then
AC_MSG_NOTICE([Okay, checking for systemd a different way...])
PKG_CHECK_MODULES(SYSTEMD,
[libsystemd],
have_systemd=yes,
have_systemd=no)
fi
fi
if test "x$have_systemd" = "xyes"; then
AC_DEFINE(HAVE_SYSTEMD,1,[Have systemd])
TOR_SYSTEMD_CFLAGS="${SYSTEMD_CFLAGS}"
TOR_SYSTEMD_LIBS="${SYSTEMD_LIBS}"
PKG_CHECK_MODULES(LIBSYSTEMD209, [libsystemd >= 209],
[AC_DEFINE(HAVE_SYSTEMD_209,1,[Have systemd v209 or more])], [])
fi
AC_SUBST(TOR_SYSTEMD_CFLAGS)
AC_SUBST(TOR_SYSTEMD_LIBS)
if test "x$enable_systemd" = "xyes" -a "x$have_systemd" != "xyes" ; then
AC_MSG_ERROR([Explicitly requested systemd support, but systemd not found])
fi
case "$host" in
*-*-solaris* )
AC_DEFINE(_REENTRANT, 1, [Define on some platforms to activate x_r() functions in time.h])
;;
esac
AC_ARG_ENABLE(gcc-warnings,
AS_HELP_STRING(--enable-gcc-warnings, [deprecated alias for enable-fatal-warnings]))
AC_ARG_ENABLE(fatal-warnings,
AS_HELP_STRING(--enable-fatal-warnings, [tell the compiler to treat all warnings as errors.]))
AC_ARG_ENABLE(gcc-warnings-advisory,
AS_HELP_STRING(--disable-gcc-warnings-advisory, [disable the regular verbose warnings]))
dnl Others suggest '/gs /safeseh /nxcompat /dynamicbase' for non-gcc on Windows
AC_ARG_ENABLE(gcc-hardening,
AS_HELP_STRING(--disable-gcc-hardening, [disable compiler security checks]))
dnl Deprecated --enable-expensive-hardening but keep it for now for backward compat.
AC_ARG_ENABLE(expensive-hardening,
AS_HELP_STRING(--enable-expensive-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
AC_ARG_ENABLE(fragile-hardening,
AS_HELP_STRING(--enable-fragile-hardening, [enable more fragile and expensive compiler hardening; makes Tor slower]))
if test "x$enable_expensive_hardening" = "xyes" || test "x$enable_fragile_hardening" = "xyes"; then
fragile_hardening="yes"
fi
dnl Linker hardening options
dnl Currently these options are ELF specific - you can't use this with MacOSX
AC_ARG_ENABLE(linker-hardening,
AS_HELP_STRING(--disable-linker-hardening, [disable linker security fixups]))
AC_ARG_ENABLE(local-appdata,
AS_HELP_STRING(--enable-local-appdata, [default to host local application data paths on Windows]))
if test "$enable_local_appdata" = "yes"; then
AC_DEFINE(ENABLE_LOCAL_APPDATA, 1,
[Defined if we default to host local appdata paths on Windows])
fi
# Tor2web mode flag
AC_ARG_ENABLE(tor2web-mode,
AS_HELP_STRING(--enable-tor2web-mode, [support tor2web non-anonymous mode]),
[if test "x$enableval" = "xyes"; then
CFLAGS="$CFLAGS -D ENABLE_TOR2WEB_MODE=1"
fi])
AC_ARG_ENABLE(tool-name-check,
AS_HELP_STRING(--disable-tool-name-check, [check for sanely named toolchain when cross-compiling]))
AC_ARG_ENABLE(seccomp,
AS_HELP_STRING(--disable-seccomp, [do not attempt to use libseccomp]))
AC_ARG_ENABLE(libscrypt,
AS_HELP_STRING(--disable-libscrypt, [do not attempt to use libscrypt]))
dnl Enable event tracing which are transformed to debug log statement.
AC_ARG_ENABLE(event-tracing-debug,
AS_HELP_STRING(--enable-event-tracing-debug, [build with event tracing to debug log]))
AM_CONDITIONAL([USE_EVENT_TRACING_DEBUG], [test "x$enable_event_tracing_debug" = "xyes"])
if test x$enable_event_tracing_debug = xyes; then
AC_DEFINE([USE_EVENT_TRACING_DEBUG], [1], [Tracing framework to log debug])
AC_DEFINE([TOR_EVENT_TRACING_ENABLED], [1], [Compile the event tracing instrumentation])
fi
dnl check for the correct "ar" when cross-compiling.
dnl (AM_PROG_AR was new in automake 1.11.2, which we do not yet require,
dnl so kludge up a replacement for the case where it isn't there yet.)
m4_ifdef([AM_PROG_AR],
[AM_PROG_AR],
[AN_MAKEVAR([AR], [AC_PROG_AR])
AN_PROGRAM([ar], [AC_PROG_AR])
AC_DEFUN([AC_PROG_AR], [AC_CHECK_TOOL([AR], [ar], [:])])
AC_PROG_AR])
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.
if test "x$enable_tool_name_check" != "xno"; then
if test "x$ac_tool_warned" = "xyes"; then
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.)])
elif test "x$ac_ct_AR" != "x" -a "x$cross_compiling" = "xmaybe"; then
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
AC_PROG_CC
AC_PROG_CPP
AC_PROG_MAKE_SET
AC_PROG_RANLIB
AC_PROG_SED
AC_ARG_VAR([PERL], [path to Perl binary])
AC_CHECK_PROGS([PERL], [perl])
AM_CONDITIONAL(USE_PERL, [test "x$ac_cv_prog_PERL" != "x"])
dnl check for asciidoc and a2x
AC_PATH_PROG([ASCIIDOC], [asciidoc], none)
AC_PATH_PROGS([A2X], [a2x a2x.py], none)
AM_CONDITIONAL(USE_ASCIIDOC, test "x$asciidoc" = "xtrue")
AM_PROG_CC_C_O
AC_PROG_CC_C99
AC_ARG_VAR([PYTHON], [path to Python binary])
AC_CHECK_PROGS(PYTHON, [python python2 python2.7 python3 python3.3])
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"])
dnl List all external rust crates we depend on here. Include the version
rust_crates="libc-0.2.22"
AC_SUBST(rust_crates)
if test "x$enable_rust" = "xyes"; then
AC_ARG_VAR([RUSTC], [path to the rustc binary])
AC_CHECK_PROG([RUSTC], [rustc], [rustc],[no])
if test "x$RUSTC" = "xno"; then
AC_MSG_ERROR([rustc unavailable but rust integration requested.])
fi
AC_ARG_VAR([CARGO], [path to the cargo binary])
AC_CHECK_PROG([CARGO], [cargo], [cargo],[no])
if test "x$CARGO" = "xno"; then
AC_MSG_ERROR([cargo unavailable but rust integration requested.])
fi
AC_DEFINE([HAVE_RUST], 1, [have Rust])
if test "x$enable_cargo_online_mode" = "xyes"; then
CARGO_ONLINE=
RUST_DL=#
else
CARGO_ONLINE=--frozen
RUST_DL=
dnl When we're not allowed to touch the network, we need crate dependencies
dnl locally available.
AC_MSG_CHECKING([rust crate dependencies])
AC_ARG_VAR([RUST_DEPENDENCIES], [path to directory with local crate mirror])
if test "x$RUST_DEPENDENCIES" = "x"; then
RUST_DEPENDENCIES="$srcdir/src/ext/rust/"
NEED_MOD=1
fi
if test ! -d "$RUST_DEPENDENCIES"; then
AC_MSG_ERROR([Rust dependency directory $RUST_DEPENDENCIES does not exist. Specify a dependency directory using the RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
fi
for dep in $rust_crates; do
if test ! -d "$RUST_DEPENDENCIES"/"$dep"; then
AC_MSG_ERROR([Failure to find rust dependency $RUST_DEPENDENCIES/$dep. Specify a dependency directory using the RUST_DEPENDENCIES variable or allow cargo to fetch crates using --enable-cargo-online-mode.])
fi
done
if test "x$NEED_MOD" = "x1"; then
dnl When looking for dependencies from cargo, pick right directory
RUST_DEPENDENCIES="../../src/ext/rust"
fi
fi
AC_SUBST(CARGO_ONLINE)
AC_SUBST(RUST_DL)
dnl Let's check the rustc version, too
AC_MSG_CHECKING([rust version])
RUSTC_VERSION_MAJOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 1`
RUSTC_VERSION_MINOR=`$RUSTC --version | cut -d ' ' -f 2 | cut -d '.' -f 2`
if test "x$RUSTC_VERSION_MAJOR" = "x" -o "x$RUSTC_VERSION_MINOR" = "x"; then
AC_MSG_ERROR([rustc version couldn't be identified])
fi
if test "$RUSTC_VERSION_MAJOR" -lt 2 -a "$RUSTC_VERSION_MINOR" -lt 14; then
AC_MSG_ERROR([rustc must be at least version 1.14])
fi
fi
ifdef([AC_C_FLEXIBLE_ARRAY_MEMBER], [
AC_C_FLEXIBLE_ARRAY_MEMBER
], [
dnl Maybe we've got an old autoconf...
AC_CACHE_CHECK([for flexible array members],
tor_cv_c_flexarray,
[AC_COMPILE_IFELSE(
AC_LANG_PROGRAM([
struct abc { int a; char b[]; };
], [
struct abc *def = malloc(sizeof(struct abc)+sizeof(char));
def->b[0] = 33;
]),
[tor_cv_c_flexarray=yes],
[tor_cv_c_flexarray=no])])
if test "$tor_cv_flexarray" = "yes"; then
AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
else
AC_DEFINE([FLEXIBLE_ARRAY_MEMBER], [1], [Define to nothing if C supports flexible array members, and to 1 if it does not.])
fi
])
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
TORUSER=_tor
AC_ARG_WITH(tor-user,
AS_HELP_STRING(--with-tor-user=NAME, [specify username for tor daemon]),
[
TORUSER=$withval
]
)
AC_SUBST(TORUSER)
TORGROUP=_tor
AC_ARG_WITH(tor-group,
AS_HELP_STRING(--with-tor-group=NAME, [specify group name for tor daemon]),
[
TORGROUP=$withval
]
)
AC_SUBST(TORGROUP)
dnl If _WIN32 is defined and non-zero, we are building for win32
AC_MSG_CHECKING([for win32])
AC_RUN_IFELSE([AC_LANG_SOURCE([
int main(int c, char **v) {
#ifdef _WIN32
#if _WIN32
return 0;
#else
return 1;
#endif
#else
return 2;
#endif
}])],
bwin32=true; AC_MSG_RESULT([yes]),
bwin32=false; AC_MSG_RESULT([no]),
bwin32=cross; AC_MSG_RESULT([cross])
)
if test "$bwin32" = "cross"; then
AC_MSG_CHECKING([for win32 (cross)])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
#ifdef _WIN32
int main(int c, char **v) {return 0;}
#else
#error
int main(int c, char **v) {return x(y);}
#endif
])],
bwin32=true; AC_MSG_RESULT([yes]),
bwin32=false; AC_MSG_RESULT([no]))
fi
AH_BOTTOM([
#ifdef _WIN32
/* Defined to access windows functions and definitions for >=WinXP */
# ifndef WINVER
# define WINVER 0x0501
# endif
/* Defined to access _other_ windows functions and definitions for >=WinXP */
# ifndef _WIN32_WINNT
# define _WIN32_WINNT 0x0501
# endif
/* Defined to avoid including some windows headers as part of Windows.h */
# ifndef WIN32_LEAN_AND_MEAN
# define WIN32_LEAN_AND_MEAN 1
# endif
#endif
])
AM_CONDITIONAL(BUILD_NT_SERVICES, test "x$bwin32" = "xtrue")
dnl Enable C99 when compiling with MIPSpro
AC_MSG_CHECKING([for MIPSpro compiler])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(, [
#if (defined(__sgi) && defined(_COMPILER_VERSION))
#error
return x(y);
#endif
])],
bmipspro=false; AC_MSG_RESULT(no),
bmipspro=true; AC_MSG_RESULT(yes))
if test "$bmipspro" = "true"; then
CFLAGS="$CFLAGS -c99"
fi
AC_C_BIGENDIAN
AC_SEARCH_LIBS(socket, [socket network])
AC_SEARCH_LIBS(gethostbyname, [nsl])
AC_SEARCH_LIBS(dlopen, [dl])
AC_SEARCH_LIBS(inet_aton, [resolv])
AC_SEARCH_LIBS(backtrace, [execinfo])
saved_LIBS="$LIBS"
AC_SEARCH_LIBS([clock_gettime], [rt])
if test "$LIBS" != "$saved_LIBS"; then
# Looks like we need -lrt for clock_gettime().
have_rt=yes
fi
AC_SEARCH_LIBS(pthread_create, [pthread])
AC_SEARCH_LIBS(pthread_detach, [pthread])
AM_CONDITIONAL(THREADS_WIN32, test "$bwin32" = "true")
AM_CONDITIONAL(THREADS_PTHREADS, test "$bwin32" = "false")
AC_CHECK_FUNCS(
_NSGetEnviron \
RtlSecureZeroMemory \
SecureZeroMemory \
accept4 \
backtrace \
backtrace_symbols_fd \
eventfd \
explicit_bzero \
timingsafe_memcmp \
flock \
ftime \
get_current_dir_name \
getaddrinfo \
getifaddrs \
getpass \
getrlimit \
gettimeofday \
gmtime_r \
htonll \
inet_aton \
ioctl \
issetugid \
llround \
localtime_r \
lround \
memmem \
memset_s \
pipe \
pipe2 \
prctl \
readpassphrase \
rint \
sigaction \
socketpair \
statvfs \
strlcat \
strlcpy \
strnlen \
strptime \
strtok_r \
strtoull \
sysconf \
sysctl \
truncate \
uname \
usleep \
vasprintf \
_vscprintf
)
# Apple messed up when they added two functions functions in Sierra: they
# forgot to decorate them with appropriate AVAILABLE_MAC_OS_VERSION
# checks. So we should only probe for those functions if we are sure that we
# are not targetting OSX 10.11 or earlier.
AC_MSG_CHECKING([for a pre-Sierra OSX build target])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifdef __APPLE__
# include <AvailabilityMacros.h>
# ifndef MAC_OS_X_VERSION_10_12
# define MAC_OS_X_VERSION_10_12 101200
# endif
# if defined(MAC_OS_X_VERSION_MIN_REQUIRED)
# if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_12
# error "Running on Mac OSX 10.11 or earlier"
# endif
# endif
#endif
]], [[]])],
[on_macos_pre_10_12=no ; AC_MSG_RESULT([no])],
[on_macos_pre_10_12=yes; AC_MSG_RESULT([yes])])
if test "$on_macos_pre_10_12" = "no"; then
AC_CHECK_FUNCS(
clock_gettime \
getentropy \
)
fi
if test "$bwin32" != "true"; then
AC_CHECK_HEADERS(pthread.h)
AC_CHECK_FUNCS(pthread_create)
AC_CHECK_FUNCS(pthread_condattr_setclock)
fi
if test "$bwin32" = "true"; then
AC_CHECK_DECLS([SecureZeroMemory, _getwch], , , [
#include <windows.h>
#include <conio.h>
#include <wchar.h>
])
fi
AM_CONDITIONAL(BUILD_READPASSPHRASE_C,
test "x$ac_cv_func_readpassphrase" = "xno" && test "$bwin32" = "false")
dnl ------------------------------------------------------
dnl Where do you live, libevent? And how do we call you?
if test "$bwin32" = "true"; then
TOR_LIB_WS32=-lws2_32
TOR_LIB_IPHLPAPI=-liphlpapi
# Some of the cargo-cults recommend -lwsock32 as well, but I don't
# think it's actually necessary.
TOR_LIB_GDI=-lgdi32
else
TOR_LIB_WS32=
TOR_LIB_GDI=
fi
AC_SUBST(TOR_LIB_WS32)
AC_SUBST(TOR_LIB_GDI)
AC_SUBST(TOR_LIB_IPHLPAPI)
tor_libevent_pkg_redhat="libevent"
tor_libevent_pkg_debian="libevent-dev"
tor_libevent_devpkg_redhat="libevent-devel"
tor_libevent_devpkg_debian="libevent-dev"
dnl On Gnu/Linux or any place we require it, we'll add librt to the Libevent
dnl linking for static builds.
STATIC_LIBEVENT_FLAGS=""
if test "$enable_static_libevent" = "yes"; then
if test "$have_rt" = "yes"; then
STATIC_LIBEVENT_FLAGS=" -lrt "
fi
fi
TOR_SEARCH_LIBRARY(libevent, $trylibeventdir, [-levent $STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32], [
#ifdef _WIN32
#include <winsock2.h>
#endif
#include <sys/time.h>
#include <sys/types.h>
#include <event2/event.h>], [
#ifdef _WIN32
#include <winsock2.h>
#endif
struct event_base;
struct event_base *event_base_new(void);],
[
#ifdef _WIN32
{WSADATA d; WSAStartup(0x101,&d); }
#endif
event_base_new();
], [--with-libevent-dir], [/opt/libevent])
dnl Determine the incantation needed to link libevent.
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
save_CPPFLAGS="$CPPFLAGS"
LIBS="$STATIC_LIBEVENT_FLAGS $TOR_LIB_WS32 $save_LIBS"
LDFLAGS="$TOR_LDFLAGS_libevent $LDFLAGS"
CPPFLAGS="$TOR_CPPFLAGS_libevent $CPPFLAGS"
AC_CHECK_HEADERS(event2/event.h event2/dns.h event2/bufferevent_ssl.h)
if test "$enable_static_libevent" = "yes"; then
if test "$tor_cv_library_libevent_dir" = "(system)"; then
AC_MSG_ERROR("You must specify an explicit --with-libevent-dir=x option when using --enable-static-libevent")
else
TOR_LIBEVENT_LIBS="$TOR_LIBDIR_libevent/libevent.a $STATIC_LIBEVENT_FLAGS"
fi
else
if test "x$ac_cv_header_event2_event_h" = "xyes"; then
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"))
if test "$ac_cv_search_event_new" != "none required"; then
TOR_LIBEVENT_LIBS="$ac_cv_search_event_new"
fi
if test "$ac_cv_search_evdns_base_new" != "none required"; then
TOR_LIBEVENT_LIBS="$ac_cv_search_evdns_base_new $TOR_LIBEVENT_LIBS"
fi
else
AC_MSG_ERROR("libevent2 is required but the headers could not be found")
fi
fi
dnl Now check for particular libevent functions.
AC_CHECK_FUNCS([evutil_secure_rng_set_urandom_device_file \
evutil_secure_rng_add_bytes \
])
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"
dnl Check that libevent is at least at version 2.0.10, the first stable
dnl release of its series
CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent"
AC_MSG_CHECKING([whether Libevent is new enough])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
#include <event2/event.h>
#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000a00
#error
int x = y(zz);
#else
int x = 1;
#endif
])], [ AC_MSG_RESULT([yes]) ],
[ AC_MSG_RESULT([no])
AC_MSG_ERROR([Libevent is not new enough. We require 2.0.10-stable or later]) ] )
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"
AC_SUBST(TOR_LIBEVENT_LIBS)
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="$LIBS"
AC_SEARCH_LIBS(pow, [m], , AC_MSG_ERROR([Could not find pow in libm or libc.]))
if test "$ac_cv_search_pow" != "none required"; then
TOR_LIB_MATH="$ac_cv_search_pow"
fi
LIBS="$save_LIBS"
AC_SUBST(TOR_LIB_MATH)
dnl ------------------------------------------------------
dnl Where do you live, openssl? And how do we call you?
tor_openssl_pkg_redhat="openssl"
tor_openssl_pkg_debian="libssl-dev"
tor_openssl_devpkg_redhat="openssl-devel"
tor_openssl_devpkg_debian="libssl-dev"
ALT_openssl_WITHVAL=""
AC_ARG_WITH(ssl-dir,
AS_HELP_STRING(--with-ssl-dir=PATH, [obsolete alias for --with-openssl-dir]),
[
if test "x$withval" != "xno" && test "x$withval" != "x"; then
ALT_openssl_WITHVAL="$withval"
fi
])
TOR_SEARCH_LIBRARY(openssl, $tryssldir, [-lssl -lcrypto $TOR_LIB_GDI],
[#include <openssl/rand.h>],
[void RAND_add(const void *buf, int num, double entropy);],
[RAND_add((void*)0,0,0);], [],
[/usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local /usr/athena /opt/openssl])
dnl XXXX check for OPENSSL_VERSION_NUMBER == SSLeay()
if test "$enable_static_openssl" = "yes"; then
if test "$tor_cv_library_openssl_dir" = "(system)"; then
AC_MSG_ERROR("You must specify an explicit --with-openssl-dir=x option when using --enable-static-openssl")
else
TOR_OPENSSL_LIBS="$TOR_LIBDIR_openssl/libssl.a $TOR_LIBDIR_openssl/libcrypto.a"
fi
else
TOR_OPENSSL_LIBS="-lssl -lcrypto"
fi
AC_SUBST(TOR_OPENSSL_LIBS)
dnl Now check for particular openssl functions.
save_LIBS="$LIBS"
save_LDFLAGS="$LDFLAGS"
save_CPPFLAGS="$CPPFLAGS"
LIBS="$TOR_OPENSSL_LIBS $LIBS"
LDFLAGS="$TOR_LDFLAGS_openssl $LDFLAGS"
CPPFLAGS="$TOR_CPPFLAGS_openssl $CPPFLAGS"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <openssl/opensslv.h>
#if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER < 0x1000100fL
#error "too old"
#endif
]], [[]])],
[ : ],
[ AC_MSG_ERROR([OpenSSL is too old. We require 1.0.1 or later. You can specify a path to a newer one with --with-openssl-dir.]) ])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <openssl/opensslv.h>
#include <openssl/evp.h>
#if defined(OPENSSL_NO_EC) || defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_ECDSA)
#error "no ECC"
#endif
#if !defined(NID_X9_62_prime256v1) || !defined(NID_secp224r1)
#error "curves unavailable"
#endif
]], [[]])],
[ : ],
[ AC_MSG_ERROR([OpenSSL is built without full ECC support, including curves P256 and P224. You can specify a path to one with ECC support with --with-openssl-dir.]) ])
AC_CHECK_MEMBERS([struct ssl_method_st.get_cipher_by_char], , ,
[#include <openssl/ssl.h>
])
AC_CHECK_FUNCS([ \
SSL_SESSION_get_master_key \
SSL_get_server_random \
SSL_get_client_ciphers \
SSL_get_client_random \
SSL_CIPHER_find \
TLS_method
])
dnl Check if OpenSSL has scrypt implementation.
AC_CHECK_FUNCS([ EVP_PBE_scrypt ])
dnl Check if OpenSSL structures are opaque
AC_CHECK_MEMBERS([SSL.state], , ,
[#include <openssl/ssl.h>
])
LIBS="$save_LIBS"
LDFLAGS="$save_LDFLAGS"
CPPFLAGS="$save_CPPFLAGS"
dnl ------------------------------------------------------
dnl Where do you live, zlib? And how do we call you?
tor_zlib_pkg_redhat="zlib"
tor_zlib_pkg_debian="zlib1g"
tor_zlib_devpkg_redhat="zlib-devel"
tor_zlib_devpkg_debian="zlib1g-dev"
TOR_SEARCH_LIBRARY(zlib, $tryzlibdir, [-lz],
[#include <zlib.h>],
[const char * zlibVersion(void);],
[zlibVersion();], [--with-zlib-dir],
[/opt/zlib])
if test "$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)
dnl ------------------------------------------------------
dnl Where we do we find lzma?
AC_ARG_ENABLE(lzma,
AS_HELP_STRING(--enable-lzma, [enable support for the LZMA compression scheme.]),
[case "${enableval}" in
"yes") lzma=true ;;
"no") lzma=false ;;
* ) AC_MSG_ERROR(bad value for --enable-lzma) ;;
esac], [lzma=auto])
if test "x$enable_lzma" = "xno"; then
have_lzma=no;
else
PKG_CHECK_MODULES([LZMA],
[liblzma],
have_lzma=yes,
have_lzma=no)
if test "x$have_lzma" = "xno" ; then
AC_MSG_WARN([Unable to find liblzma.])
fi
fi
if test "x$have_lzma" = "xyes"; then
AC_DEFINE(HAVE_LZMA,1,[Have LZMA])
TOR_LZMA_CFLAGS="${LZMA_CFLAGS}"
TOR_LZMA_LIBS="${LZMA_LIBS}"
fi
AC_SUBST(TOR_LZMA_CFLAGS)
AC_SUBST(TOR_LZMA_LIBS)
dnl ------------------------------------------------------
dnl Where we do we find zstd?
AC_ARG_ENABLE(zstd,
AS_HELP_STRING(--enable-zstd, [enable support for the Zstandard compression scheme.]),
[case "${enableval}" in
"yes") zstd=true ;;
"no") zstd=false ;;
* ) AC_MSG_ERROR(bad value for --enable-zstd) ;;
esac], [zstd=auto])
if test "x$enable_zstd" = "xno"; then
have_zstd=no;
else
PKG_CHECK_MODULES([ZSTD],
[libzstd >= 1.1],
have_zstd=yes,
have_zstd=no)
if test "x$have_zstd" = "xno" ; then
AC_MSG_WARN([Unable to find libzstd.])
fi
fi
if test "x$have_zstd" = "xyes"; then
AC_DEFINE(HAVE_ZSTD,1,[Have Zstd])
TOR_ZSTD_CFLAGS="${ZSTD_CFLAGS}"
TOR_ZSTD_LIBS="${ZSTD_LIBS}"
fi
AC_SUBST(TOR_ZSTD_CFLAGS)
AC_SUBST(TOR_ZSTD_LIBS)
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)
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.
all_ldflags_for_check="$TOR_LDFLAGS_zlib $TOR_LDFLAGS_openssl $TOR_LDFLAGS_libevent"
all_libs_for_check="$TOR_ZLIB_LIBS $TOR_LIB_MATH $TOR_LIBEVENT_LIBS $TOR_OPENSSL_LIBS $TOR_SYSTEMD_LIBS $TOR_LIB_WS32 $TOR_LIB_GDI $TOR_CAP_LIBS"
CFLAGS_FTRAPV=
CFLAGS_FWRAPV=
CFLAGS_ASAN=
CFLAGS_UBSAN=
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [
#if !defined(__clang__)
#error
#endif])], have_clang=yes, have_clang=no)
if test "x$enable_gcc_hardening" != "xno"; then
CFLAGS="$CFLAGS -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2"
if test "x$have_clang" = "xyes"; then
TOR_CHECK_CFLAGS(-Qunused-arguments)
fi
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])
m4_ifdef([AS_VAR_IF],[
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.)]))
)])
AS_VAR_POPDEF([can_link])
AS_VAR_POPDEF([can_compile])
TOR_CHECK_CFLAGS(-Wstack-protector)
TOR_CHECK_CFLAGS(--param ssp-buffer-size=1)
if test "$bwin32" = "false" && test "$enable_libfuzzer" != "yes" && test "$enable_oss_fuzz" != "yes"; then
TOR_CHECK_CFLAGS(-fPIE)
TOR_CHECK_LDFLAGS(-pie, "$all_ldflags_for_check", "$all_libs_for_check")
fi
TOR_TRY_COMPILE_WITH_CFLAGS(-fwrapv, also_link, CFLAGS_FWRAPV="-fwrapv", true)
fi
if test "$fragile_hardening" = "yes"; then
TOR_TRY_COMPILE_WITH_CFLAGS(-ftrapv, also_link, CFLAGS_FTRAPV="-ftrapv", 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
if test "$tor_cv_cflags__ftrapv" != "yes"; then
AC_MSG_ERROR([You requested fragile hardening, but the compiler does not seem to support -ftrapv.])
fi
TOR_TRY_COMPILE_WITH_CFLAGS([-fsanitize=address], also_link, CFLAGS_ASAN="-fsanitize=address", true)
if test "$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 "$tor_can_link__fsanitize_address" != "yes"; then
AC_MSG_ERROR([The compiler supports -fsanitize=undefined, but for some reason I was not able to link when using it. Are you missing run-time support? With GCC you need libasan.so, and with Clang you need libclang_rt.ubsan*])
fi
TOR_CHECK_CFLAGS([-fno-omit-frame-pointer])
fi
CFLAGS_BUGTRAP="$CFLAGS_FTRAPV $CFLAGS_ASAN $CFLAGS_UBSAN"
CFLAGS_CONSTTIME="$CFLAGS_FWRAPV"
mulodi_fixes_ftrapv=no
if test "$have_clang" = "yes"; then
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $CFLAGS_FTRAPV"
AC_MSG_CHECKING([whether clang -ftrapv can link a 64-bit int multiply])
AC_LINK_IFELSE([
AC_LANG_SOURCE([[
#include <stdint.h>
#include <stdlib.h>
int main(int argc, char **argv)
{
int64_t x = ((int64_t)atoi(argv[1])) * (int64_t)atoi(argv[2])
* (int64_t)atoi(argv[3]);
return x == 9;
} ]])],
[ftrapv_can_link=yes; AC_MSG_RESULT([yes])],
[ftrapv_can_link=no; AC_MSG_RESULT([no])])
if test "$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])
* (int64_t)atoi(argv[3]);
return x == 9;
} ]])],
[mulodi_fixes_ftrapv=yes; AC_MSG_RESULT([yes])],
[mulodi_fixes_ftrapv=no; AC_MSG_RESULT([no])])
fi
CFLAGS="$saved_CFLAGS"
fi
AM_CONDITIONAL(ADD_MULODI4, test "$mulodi_fixes_ftrapv" = "yes")
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)
if test "x$enable_linker_hardening" != "xno"; then
TOR_CHECK_LDFLAGS(-z relro -z now, "$all_ldflags_for_check", "$all_libs_for_check")
fi
# For backtrace support
TOR_CHECK_LDFLAGS(-rdynamic)
dnl ------------------------------------------------------
dnl Now see if we have a -fomit-frame-pointer compiler option.
saved_CFLAGS="$CFLAGS"
TOR_CHECK_CFLAGS(-fomit-frame-pointer)
F_OMIT_FRAME_POINTER=''
if test "$saved_CFLAGS" != "$CFLAGS"; then
if test "$fragile_hardening" = "yes"; then
F_OMIT_FRAME_POINTER='-fomit-frame-pointer'
fi
fi
CFLAGS="$saved_CFLAGS"
AC_SUBST(F_OMIT_FRAME_POINTER)
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)
dnl ============================================================
dnl Check for libseccomp
if test "x$enable_seccomp" != "xno"; then
AC_CHECK_HEADERS([seccomp.h])
AC_SEARCH_LIBS(seccomp_init, [seccomp])
fi
dnl ============================================================
dnl Check for libscrypt
if test "x$enable_libscrypt" != "xno"; then
AC_CHECK_HEADERS([libscrypt.h])
AC_SEARCH_LIBS(libscrypt_scrypt, [scrypt])
AC_CHECK_FUNCS([libscrypt_scrypt])
fi
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=
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="$tor_saved_LIBS" ])
dnl Okay, now we need to figure out which one to actually use. Fall back
dnl to curve25519-donna.c
if test "x$tor_cv_can_use_curve25519_donna_c64" != "xno"; then
build_curve25519_donna_c64=yes
use_curve25519_donna=yes
elif test "x$tor_cv_can_use_curve25519_nacl" = "xyes"; then
use_curve25519_nacl=yes
CURVE25519_LIBS=-lnacl
else
build_curve25519_donna=yes
use_curve25519_donna=yes
fi
if test "x$use_curve25519_donna" = "xyes"; then
AC_DEFINE(USE_CURVE25519_DONNA, 1,
[Defined if we should use an internal curve25519_donna{,_c64} implementation])
fi
if test "x$use_curve25519_nacl" = "xyes"; then
AC_DEFINE(USE_CURVE25519_NACL, 1,
[Defined if we should use a curve25519 from nacl])
fi
AM_CONDITIONAL(BUILD_CURVE25519_DONNA,
test "x$build_curve25519_donna" = "xyes")
AM_CONDITIONAL(BUILD_CURVE25519_DONNA_C64,
test "x$build_curve25519_donna_c64" = "xyes")
AC_SUBST(CURVE25519_LIBS)
dnl Make sure to enable support for large off_t if available.
AC_SYS_LARGEFILE
AC_CHECK_HEADERS([assert.h \
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/random.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])
AC_CHECK_HEADERS(sys/param.h)
AC_CHECK_HEADERS(net/if.h, net_if_found=1, net_if_found=0,
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif])
AC_CHECK_HEADERS(net/pfvar.h, net_pfvar_found=1, net_pfvar_found=0,
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif])
AC_CHECK_HEADERS(linux/if.h,[],[],
[
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
])
AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
linux_netfilter_ipv4=1, linux_netfilter_ipv4=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])
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])
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")
else
AC_MSG_NOTICE([Transparent proxy support enabled, but missing headers.])
fi
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])
dnl In case we aren't given a working stdint.h, we'll need to grow our own.
dnl Watch out.
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)
AC_CHECK_SIZEOF(intptr_t)
AC_CHECK_SIZEOF(uintptr_t)
dnl AC_CHECK_TYPES([int8_t, int16_t, int32_t, int64_t, uint8_t, uint16_t, uint32_t, uint64_t, intptr_t, uintptr_t])
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)
AC_CHECK_SIZEOF(void *)
AC_CHECK_SIZEOF(time_t)
AC_CHECK_SIZEOF(size_t)
AC_CHECK_SIZEOF(pid_t)
AC_CHECK_TYPES([uint, u_char, ssize_t])
AC_PC_FROM_UCONTEXT([:])
dnl used to include sockaddr_storage, but everybody has that.
AC_CHECK_TYPES([struct in6_addr, struct sockaddr_in6, sa_family_t], , ,
[#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
#ifdef _WIN32
#define _WIN32_WINNT 0x0501
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
])
AC_CHECK_MEMBERS([struct in6_addr.s6_addr32, struct in6_addr.s6_addr16, struct sockaddr_in.sin_len, struct sockaddr_in6.sin6_len], , ,
[#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
#ifdef _WIN32
#define _WIN32_WINNT 0x0501
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
])
AC_CHECK_TYPES([rlim_t], , ,
[#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
])
AX_CHECK_SIGN([time_t],
[ : ],
[ : ], [
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_TIME_H
#include <time.h>
#endif
])
if test "$ax_cv_decl_time_t_signed" = "no"; then
AC_MSG_ERROR([You have an unsigned time_t; Tor does not support that. Please tell the Tor developers about your interesting platform.])
fi
AX_CHECK_SIGN([size_t],
[ tor_cv_size_t_signed=yes ],
[ tor_cv_size_t_signed=no ], [
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
])
if test "$ax_cv_decl_size_t_signed" = "yes"; then
AC_MSG_ERROR([You have a signed size_t; that's grossly nonconformant.])
fi
AX_CHECK_SIGN([enum always],
[ AC_DEFINE(ENUM_VALS_ARE_SIGNED, 1, [Define if enum is always signed]) ],
[ : ], [
enum always { AAA, BBB, CCC };
])
AC_CHECK_SIZEOF(socklen_t, , [AC_INCLUDES_DEFAULT()
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
])
# We want to make sure that we _don't_ have a cell_t defined, like IRIX does.
AC_CHECK_SIZEOF(cell_t)
# Now make sure that NULL can be represented as zero bytes.
AC_CACHE_CHECK([whether memset(0) sets pointers to NULL], tor_cv_null_is_zero,
[AC_RUN_IFELSE([AC_LANG_SOURCE(
[[#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif
int main () { char *p1,*p2; p1=NULL; memset(&p2,0,sizeof(p2));
return memcmp(&p1,&p2,sizeof(char*))?1:0; }]])],
[tor_cv_null_is_zero=yes],
[tor_cv_null_is_zero=no],
[tor_cv_null_is_zero=cross])])
if test "$tor_cv_null_is_zero" = "cross"; then
# Cross-compiling; let's hope that the target isn't raving mad.
AC_MSG_NOTICE([Cross-compiling: we'll assume that NULL is represented as a sequence of 0-valued bytes.])
fi
if test "$tor_cv_null_is_zero" != "no"; then
AC_DEFINE([NULL_REP_IS_ZERO_BYTES], 1,
[Define to 1 iff memset(0) sets pointers to NULL])
fi
AC_CACHE_CHECK([whether memset(0) sets doubles to 0.0], tor_cv_dbl0_is_zero,
[AC_RUN_IFELSE([AC_LANG_SOURCE(
[[#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif
int main () { double d1,d2; d1=0; memset(&d2,0,sizeof(d2));
return memcmp(&d1,&d2,sizeof(d1))?1:0; }]])],
[tor_cv_dbl0_is_zero=yes],
[tor_cv_dbl0_is_zero=no],
[tor_cv_dbl0_is_zero=cross])])
if test "$tor_cv_dbl0_is_zero" = "cross"; then
# Cross-compiling; let's hope that the target isn't raving mad.
AC_MSG_NOTICE([Cross-compiling: we'll assume that 0.0 can be represented as a sequence of 0-valued bytes.])
fi
if test "$tor_cv_dbl0_is_zero" != "no"; then
AC_DEFINE([DOUBLE_0_REP_IS_ZERO_BYTES], 1,
[Define to 1 iff memset(0) sets doubles to 0.0])
fi
# And what happens when we malloc zero?
AC_CACHE_CHECK([whether we can malloc(0) safely.], tor_cv_malloc_zero_works,
[AC_RUN_IFELSE([AC_LANG_SOURCE(
[[#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#ifdef HAVE_STDDEF_H
#include <stddef.h>
#endif
int main () { return malloc(0)?0:1; }]])],
[tor_cv_malloc_zero_works=yes],
[tor_cv_malloc_zero_works=no],
[tor_cv_malloc_zero_works=cross])])
if test "$tor_cv_malloc_zero_works" = "cross"; then
# Cross-compiling; let's hope that the target isn't raving mad.
AC_MSG_NOTICE([Cross-compiling: we'll assume that we need to check malloc() arguments for 0.])
fi
if test "$tor_cv_malloc_zero_works" = "yes"; then
AC_DEFINE([MALLOC_ZERO_WORKS], 1,
[Define to 1 iff malloc(0) returns a pointer])
fi
# whether we seem to be in a 2s-complement world.
AC_CACHE_CHECK([whether we are using 2s-complement arithmetic], tor_cv_twos_complement,
[AC_RUN_IFELSE([AC_LANG_SOURCE(
[[int main () { int problem = ((-99) != (~99)+1);
return problem ? 1 : 0; }]])],
[tor_cv_twos_complement=yes],
[tor_cv_twos_complement=no],
[tor_cv_twos_complement=cross])])
if test "$tor_cv_twos_complement" = "cross"; then
# Cross-compiling; let's hope that the target isn't raving mad.
AC_MSG_NOTICE([Cross-compiling: we'll assume that negative integers are represented with two's complement.])
fi
if test "$tor_cv_twos_complement" != "no"; then
AC_DEFINE([USING_TWOS_COMPLEMENT], 1,
[Define to 1 iff we represent negative integers with
two's complement])
fi
# What does shifting a negative value do?
AC_CACHE_CHECK([whether right-shift on negative values does sign-extension], tor_cv_sign_extend,
[AC_RUN_IFELSE([AC_LANG_SOURCE(
[[int main () { int okay = (-60 >> 8) == -1; return okay ? 0 : 1; }]])],
[tor_cv_sign_extend=yes],
[tor_cv_sign_extend=no],
[tor_cv_sign_extend=cross])])
if test "$tor_cv_sign_extend" = "cross"; then
# Cross-compiling; let's hope that the target isn't raving mad.
AC_MSG_NOTICE([Cross-compiling: we'll assume that right-shifting negative integers causes sign-extension])
fi
if test "$tor_cv_sign_extend" != "no"; then
AC_DEFINE([RSHIFT_DOES_SIGN_EXTEND], 1,
[Define to 1 iff right-shifting a negative value performs sign-extension])
fi
# Is uint8_t the same type as unsigned char?
AC_CACHE_CHECK([whether uint8_t is the same type as unsigned char], tor_cv_uint8_uchar,
[AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include <stdint.h>
extern uint8_t c;
unsigned char c;]])],
[tor_cv_uint8_uchar=yes],
[tor_cv_uint8_uchar=no],
[tor_cv_uint8_uchar=cross])])
if test "$tor_cv_uint8_uchar" = "cross"; then
AC_MSG_NOTICE([Cross-compiling: we'll assume that uint8_t is the same type as unsigned char])
fi
if test "$tor_cv_uint8_uchar" = "no"; then
AC_MSG_ERROR([We assume that uint8_t is the same type as unsigned char, but your compiler disagrees.])
fi
# Whether we should use the dmalloc memory allocation debugging library.
AC_MSG_CHECKING(whether to use dmalloc (debug memory allocation library))
AC_ARG_WITH(dmalloc,
AS_HELP_STRING(--with-dmalloc, [use debug memory allocation library]),
[if [[ "$withval" = "yes" ]]; then
dmalloc=1
AC_MSG_RESULT(yes)
else
dmalloc=1
AC_MSG_RESULT(no)
fi], [ dmalloc=0; AC_MSG_RESULT(no) ]
)
if [[ $dmalloc -eq 1 ]]; then
AC_CHECK_HEADERS(dmalloc.h, , AC_MSG_ERROR(dmalloc header file not found. Do you have the development files for dmalloc installed?))
AC_SEARCH_LIBS(dmalloc_malloc, [dmallocth dmalloc], , AC_MSG_ERROR(Libdmalloc library not found. If you enable it you better have it installed.))
AC_DEFINE(USE_DMALLOC, 1, [Debug memory allocation library])
AC_CHECK_FUNCS(dmalloc_strdup dmalloc_strndup)
fi
AC_ARG_WITH(tcmalloc,
AS_HELP_STRING(--with-tcmalloc, [use tcmalloc memory allocation library]),
[ tcmalloc=yes ], [ tcmalloc=no ])
if test "x$tcmalloc" = "xyes"; then
LDFLAGS="-ltcmalloc $LDFLAGS"
fi
using_custom_malloc=no
if test "x$enable_openbsd_malloc" = "xyes"; then
using_custom_malloc=yes
fi
if test "x$tcmalloc" = "xyes"; then
using_custom_malloc=yes
fi
if test "$using_custom_malloc" = "no"; then
AC_CHECK_FUNCS(mallinfo)
fi
# By default, we're going to assume we don't have mlockall()
# bionic and other platforms have various broken mlockall subsystems.
# Some systems don't have a working mlockall, some aren't linkable,
# and some have it but don't declare it.
AC_CHECK_FUNCS(mlockall)
AC_CHECK_DECLS([mlockall], , , [
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif])
# Some MinGW environments don't have getpagesize in unistd.h. We don't use
# AC_CHECK_FUNCS(getpagesize), because other environments rename getpagesize
# using macros
AC_CHECK_DECLS([getpagesize], , , [
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif])
# Allow user to specify an alternate syslog facility
AC_ARG_WITH(syslog-facility,
AS_HELP_STRING(--with-syslog-facility=LOG, [syslog facility to use (default=LOG_DAEMON)]),
syslog_facility="$withval", syslog_facility="LOG_DAEMON")
AC_DEFINE_UNQUOTED(LOGFACILITY,$syslog_facility,[name of the syslog facility])
AC_SUBST(LOGFACILITY)
# Check if we have getresuid and getresgid
AC_CHECK_FUNCS(getresuid getresgid)
# Check for gethostbyname_r in all its glorious incompatible versions.
# (This logic is based on that in Python's configure.in)
AH_TEMPLATE(HAVE_GETHOSTBYNAME_R,
[Define this if you have any gethostbyname_r()])
AC_CHECK_FUNC(gethostbyname_r, [
AC_MSG_CHECKING([how many arguments gethostbyname_r() wants])
OLD_CFLAGS=$CFLAGS
CFLAGS="$CFLAGS $MY_CPPFLAGS $MY_THREAD_CPPFLAGS $MY_CFLAGS"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <netdb.h>
]], [[
char *cp1, *cp2;
struct hostent *h1, *h2;
int i1, i2;
(void)gethostbyname_r(cp1,h1,cp2,i1,&h2,&i2);
]])],[
AC_DEFINE(HAVE_GETHOSTBYNAME_R)
AC_DEFINE(HAVE_GETHOSTBYNAME_R_6_ARG, 1,
[Define this if gethostbyname_r takes 6 arguments])
AC_MSG_RESULT(6)
], [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <netdb.h>
]], [[
char *cp1, *cp2;
struct hostent *h1;
int i1, i2;
(void)gethostbyname_r(cp1,h1,cp2,i1,&i2);
]])], [
AC_DEFINE(HAVE_GETHOSTBYNAME_R)
AC_DEFINE(HAVE_GETHOSTBYNAME_R_5_ARG, 1,
[Define this if gethostbyname_r takes 5 arguments])
AC_MSG_RESULT(5)
], [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <netdb.h>
]], [[
char *cp1;
struct hostent *h1;
struct hostent_data hd;
(void) gethostbyname_r(cp1,h1,&hd);
]])], [
AC_DEFINE(HAVE_GETHOSTBYNAME_R)
AC_DEFINE(HAVE_GETHOSTBYNAME_R_3_ARG, 1,
[Define this if gethostbyname_r takes 3 arguments])
AC_MSG_RESULT(3)
], [
AC_MSG_RESULT(0)
])
])
])
CFLAGS=$OLD_CFLAGS
])
AC_CACHE_CHECK([whether the C compiler supports __func__],
tor_cv_have_func_macro,
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
#include <stdio.h>
int main(int c, char **v) { puts(__func__); }])],
tor_cv_have_func_macro=yes,
tor_cv_have_func_macro=no))
AC_CACHE_CHECK([whether the C compiler supports __FUNC__],
tor_cv_have_FUNC_macro,
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
#include <stdio.h>
int main(int c, char **v) { puts(__FUNC__); }])],
tor_cv_have_FUNC_macro=yes,
tor_cv_have_FUNC_macro=no))
AC_CACHE_CHECK([whether the C compiler supports __FUNCTION__],
tor_cv_have_FUNCTION_macro,
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
#include <stdio.h>
int main(int c, char **v) { puts(__FUNCTION__); }])],
tor_cv_have_FUNCTION_macro=yes,
tor_cv_have_FUNCTION_macro=no))
AC_CACHE_CHECK([whether we have extern char **environ already declared],
tor_cv_have_environ_declared,
AC_COMPILE_IFELSE([AC_LANG_SOURCE([
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <stdlib.h>
int main(int c, char **v) { char **t = environ; }])],
tor_cv_have_environ_declared=yes,
tor_cv_have_environ_declared=no))
if test "$tor_cv_have_func_macro" = "yes"; then
AC_DEFINE(HAVE_MACRO__func__, 1, [Defined if the compiler supports __func__])
fi
if test "$tor_cv_have_FUNC_macro" = "yes"; then
AC_DEFINE(HAVE_MACRO__FUNC__, 1, [Defined if the compiler supports __FUNC__])
fi
if test "$tor_cv_have_FUNCTION_macro" = "yes"; then
AC_DEFINE(HAVE_MACRO__FUNCTION__, 1,
[Defined if the compiler supports __FUNCTION__])
fi
if test "$tor_cv_have_environ_declared" = "yes"; then
AC_DEFINE(HAVE_EXTERN_ENVIRON_DECLARED, 1,
[Defined if we have extern char **environ already declared])
fi
# $prefix stores the value of the --prefix command line option, or
# NONE if the option wasn't set. In the case that it wasn't set, make
# it be the default, so that we can use it to expand directories now.
if test "x$prefix" = "xNONE"; then
prefix=$ac_default_prefix
fi
# and similarly for $exec_prefix
if test "x$exec_prefix" = "xNONE"; then
exec_prefix=$prefix
fi
if test "x$BUILDDIR" = "x"; then
BUILDDIR=`pwd`
fi
AC_SUBST(BUILDDIR)
AH_TEMPLATE([BUILDDIR],[tor's build directory])
AC_DEFINE_UNQUOTED(BUILDDIR,"$BUILDDIR")
if test "x$CONFDIR" = "x"; then
CONFDIR=`eval echo $sysconfdir/tor`
fi
AC_SUBST(CONFDIR)
AH_TEMPLATE([CONFDIR],[tor's configuration directory])
AC_DEFINE_UNQUOTED(CONFDIR,"$CONFDIR")
BINDIR=`eval echo $bindir`
AC_SUBST(BINDIR)
LOCALSTATEDIR=`eval echo $localstatedir`
AC_SUBST(LOCALSTATEDIR)
if test "$bwin32" = "true"; then
# Test if the linker supports the --nxcompat and --dynamicbase options
# for Windows
save_LDFLAGS="$LDFLAGS"
LDFLAGS="-Wl,--nxcompat -Wl,--dynamicbase"
AC_MSG_CHECKING([whether the linker supports DllCharacteristics])
AC_LINK_IFELSE([AC_LANG_PROGRAM([])],
[AC_MSG_RESULT([yes])]
[save_LDFLAGS="$save_LDFLAGS $LDFLAGS"],
[AC_MSG_RESULT([no])]
)
LDFLAGS="$save_LDFLAGS"
fi
# Set CFLAGS _after_ all the above checks, since our warnings are stricter
# than autoconf's macros like.
if test "$GCC" = "yes"; then
# Disable GCC's strict aliasing checks. They are an hours-to-debug
# accident waiting to happen.
CFLAGS="$CFLAGS -Wall -fno-strict-aliasing"
else
# Override optimization level for non-gcc compilers
CFLAGS="$CFLAGS -O"
enable_gcc_warnings=no
enable_gcc_warnings_advisory=no
fi
# Warnings implies advisory-warnings and -Werror.
if test "$enable_gcc_warnings" = "yes"; then
enable_gcc_warnings_advisory=yes
enable_fatal_warnings=yes
fi
# OS X Lion started deprecating the system openssl. Let's just disable
# all deprecation warnings on OS X. Also, to potentially make the binary
# a little smaller, let's enable dead_strip.
case "$host_os" in
darwin*)
CFLAGS="$CFLAGS -Wno-deprecated-declarations"
LDFLAGS="$LDFLAGS -dead_strip" ;;
esac
# Add some more warnings which we use in development but not in the
# released versions. (Some relevant gcc versions can't handle these.)
#
# Note that we have to do this near the end of the autoconf process, or
# else we may run into problems when these warnings hit on the testing C
# programs that autoconf wants to build.
if test "x$enable_gcc_warnings_advisory" != "xno"; then
case "$host" in
*-*-openbsd* | *-*-bitrig*)
# Some OpenBSD versions (like 4.8) have -Wsystem-headers by default.
# That's fine, except that the headers don't pass -Wredundant-decls.
# Therefore, let's disable -Wsystem-headers when we're building
# with maximal warnings on OpenBSD.
CFLAGS="$CFLAGS -Wno-system-headers" ;;
esac
# GCC4.3 users once report trouble with -Wstrict-overflow=5. GCC5 users
# have it work better.
# CFLAGS="$CFLAGS -Wstrict-overflow=1"
# This warning was added in gcc 4.3, but it appears to generate
# spurious warnings in gcc 4.4. I don't know if it works in 4.5.
#CFLAGS="$CFLAGS -Wlogical-op"
m4_foreach_w([warning_flag], [
-Waddress
-Waddress-of-array-temporary
-Waddress-of-temporary
-Wambiguous-macro
-Wanonymous-pack-parens
-Warc
-Warc-abi
-Warc-bridge-casts-disallowed-in-nonarc
-Warc-maybe-repeated-use-of-weak
-Warc-performSelector-leaks
-Warc-repeated-use-of-weak
-Warray-bounds
-Warray-bounds-pointer-arithmetic
-Wasm
-Wasm-operand-widths
-Watomic-properties
-Watomic-property-with-user-defined-accessor
-Wauto-import
-Wauto-storage-class
-Wauto-var-id
-Wavailability
-Wbackslash-newline-escape
-Wbad-array-new-length
-Wbind-to-temporary-copy
-Wbitfield-constant-conversion
-Wbool-conversion
-Wbool-conversions
-Wbuiltin-requires-header
-Wchar-align
-Wcompare-distinct-pointer-types
-Wcomplex-component-init
-Wconditional-type-mismatch
-Wconfig-macros
-Wconstant-conversion
-Wconstant-logical-operand
-Wconstexpr-not-const
-Wcustom-atomic-properties
-Wdangling-field
-Wdangling-initializer-list
-Wdate-time
-Wdelegating-ctor-cycles
-Wdeprecated-implementations
-Wdeprecated-register
-Wdirect-ivar-access
-Wdiscard-qual
-Wdistributed-object-modifiers
-Wdivision-by-zero
-Wdollar-in-identifier-extension
-Wdouble-promotion
-Wduplicate-decl-specifier
-Wduplicate-enum
-Wduplicate-method-arg
-Wduplicate-method-match
-Wduplicated-cond
-Wdynamic-class-memaccess
-Wembedded-directive
-Wempty-translation-unit
-Wenum-conversion
-Wexit-time-destructors
-Wexplicit-ownership-type
-Wextern-initializer
-Wextra
-Wextra-semi
-Wextra-tokens
-Wflexible-array-extensions
-Wfloat-conversion
-Wformat-non-iso
-Wfour-char-constants
-Wgcc-compat
-Wglobal-constructors
-Wgnu-array-member-paren-init
-Wgnu-designator
-Wgnu-static-float-init
-Wheader-guard
-Wheader-hygiene
-Widiomatic-parentheses
-Wignored-attributes
-Wimplicit-atomic-properties
-Wimplicit-conversion-floating-point-to-bool
-Wimplicit-exception-spec-mismatch
-Wimplicit-fallthrough
-Wimplicit-fallthrough-per-function
-Wimplicit-retain-self
-Wimport-preprocessor-directive-pedantic
-Wincompatible-library-redeclaration
-Wincompatible-pointer-types-discards-qualifiers
-Wincomplete-implementation
-Wincomplete-module
-Wincomplete-umbrella
-Winit-self
-Wint-conversions
-Wint-to-void-pointer-cast
-Winteger-overflow
-Winvalid-constexpr
-Winvalid-iboutlet
-Winvalid-noreturn
-Winvalid-pp-token
-Winvalid-source-encoding
-Winvalid-token-paste
-Wknr-promoted-parameter
-Wlanguage-extension-token
-Wlarge-by-value-copy
-Wliteral-conversion
-Wliteral-range
-Wlocal-type-template-args
-Wlogical-op
-Wloop-analysis
-Wmain-return-type
-Wmalformed-warning-check
-Wmethod-signatures
-Wmicrosoft
-Wmicrosoft-exists
-Wmismatched-parameter-types
-Wmismatched-return-types
-Wmissing-field-initializers
-Wmissing-format-attribute
-Wmissing-noreturn
-Wmissing-selector-name
-Wmissing-sysroot
-Wmissing-variable-declarations
-Wmodule-conflict
-Wnested-anon-types
-Wnewline-eof
-Wnon-literal-null-conversion
-Wnon-pod-varargs
-Wnonportable-cfstrings
-Wnormalized=id
-Wnull-arithmetic
-Wnull-character
-Wnull-conversion
-Wnull-dereference
-Wout-of-line-declaration
-Wover-aligned
-Woverlength-strings
-Woverride-init
-Woverriding-method-mismatch
-Wpointer-type-mismatch
-Wpredefined-identifier-outside-function
-Wprotocol-property-synthesis-ambiguity
-Wreadonly-iboutlet-property
-Wreadonly-setter-attrs
-Wreceiver-expr
-Wreceiver-forward-class
-Wreceiver-is-weak
-Wreinterpret-base-class
-Wrequires-super-attribute
-Wreserved-user-defined-literal
-Wreturn-stack-address
-Wsection
-Wselector-type-mismatch
-Wsentinel
-Wserialized-diagnostics
-Wshadow
-Wshift-count-negative
-Wshift-count-overflow
-Wshift-negative-value
-Wshift-overflow=2
-Wshift-sign-overflow
-Wshorten-64-to-32
-Wsizeof-array-argument
-Wsource-uses-openmp
-Wstatic-float-init
-Wstatic-in-inline
-Wstatic-local-in-inline
-Wstrict-overflow=1
-Wstring-compare
-Wstring-conversion
-Wstrlcpy-strlcat-size
-Wstrncat-size
-Wsuggest-attribute=format
-Wsuggest-attribute=noreturn
-Wsuper-class-method-mismatch
-Wswitch-bool
-Wsync-nand
-Wtautological-constant-out-of-range-compare
-Wtentative-definition-incomplete-type
-Wtrampolines
-Wtype-safety
-Wtypedef-redefinition
-Wtypename-missing
-Wundefined-inline
-Wundefined-internal
-Wundefined-reinterpret-cast
-Wunicode
-Wunicode-whitespace
-Wunknown-warning-option
-Wunnamed-type-template-args
-Wunneeded-member-function
-Wunsequenced
-Wunsupported-visibility
-Wunused-but-set-parameter
-Wunused-but-set-variable
-Wunused-command-line-argument
-Wunused-const-variable=2
-Wunused-exception-parameter
-Wunused-local-typedefs
-Wunused-member-function
-Wunused-sanitize-argument
-Wunused-volatile-lvalue
-Wuser-defined-literals
-Wvariadic-macros
-Wvector-conversion
-Wvector-conversions
-Wvexing-parse
-Wvisibility
-Wvla-extension
-Wzero-length-array
], [ TOR_CHECK_CFLAGS([warning_flag]) ])
dnl We should re-enable this in some later version. Clang doesn't
dnl mind, but it causes trouble with GCC.
dnl -Wstrict-overflow=2
dnl These seem to require annotations that we don't currently use,
dnl and they give false positives in our pthreads wrappers. (Clang 4)
dnl -Wthread-safety
dnl -Wthread-safety-analysis
dnl -Wthread-safety-attributes
dnl -Wthread-safety-beta
dnl -Wthread-safety-precise
CFLAGS="$CFLAGS -W -Wfloat-equal -Wundef -Wpointer-arith"
CFLAGS="$CFLAGS -Wstrict-prototypes -Wmissing-prototypes -Wwrite-strings"
CFLAGS="$CFLAGS -Wredundant-decls -Wchar-subscripts -Wcomment -Wformat=2"
CFLAGS="$CFLAGS -Wwrite-strings"
CFLAGS="$CFLAGS -Wnested-externs -Wbad-function-cast -Wswitch-enum"
CFLAGS="$CFLAGS -Waggregate-return -Wpacked -Wunused"
CFLAGS="$CFLAGS -Wunused-parameter "
# These interfere with building main() { return 0; }, which autoconf
# likes to use as its default program.
CFLAGS="$CFLAGS -Wold-style-definition -Wmissing-declarations"
if test "$tor_cv_cflags__Wnull_dereference" = "yes"; then
AC_DEFINE([HAVE_CFLAG_WNULL_DEREFERENCE], 1, [True if we have -Wnull-dereference])
fi
if test "$tor_cv_cflags__Woverlength_strings" = "yes"; then
AC_DEFINE([HAVE_CFLAG_WOVERLENGTH_STRINGS], 1, [True if we have -Woverlength-strings])
fi
if test "x$enable_fatal_warnings" = "xyes"; then
# I'd like to use TOR_CHECK_CFLAGS here, but I can't, since the
# default autoconf programs are full of errors.
CFLAGS="$CFLAGS -Werror"
fi
fi
if test "$enable_coverage" = "yes" && test "$have_clang" = "no"; then
case "$host_os" in
darwin*)
AC_MSG_WARN([Tried to enable coverage on OSX without using the clang compiler. This might not work! If coverage fails, use CC=clang when configuring with --enable-coverage.])
esac
fi
CPPFLAGS="$CPPFLAGS $TOR_CPPFLAGS_libevent $TOR_CPPFLAGS_openssl $TOR_CPPFLAGS_zlib"
AC_CONFIG_FILES([
Doxyfile
Makefile
contrib/dist/suse/tor.sh
contrib/operator-tools/tor.logrotate
contrib/dist/tor.sh
contrib/dist/torctl
contrib/dist/tor.service
src/config/torrc.sample
src/config/torrc.minimal
src/rust/.cargo/config
scripts/maint/checkOptionDocs.pl
scripts/maint/updateVersions.pl
])
if test "x$asciidoc" = "xtrue" && test "$ASCIIDOC" = "none"; then
regular_mans="doc/tor doc/tor-gencert doc/tor-resolve doc/torify"
for file in $regular_mans ; do
if ! [[ -f "$srcdir/$file.1.in" ]] || ! [[ -f "$srcdir/$file.html.in" ]] ; then
echo "==================================";
echo;
echo "Building Tor has failed since manpages cannot be built.";
echo;
echo "You need asciidoc installed to be able to build the manpages.";
echo "To build without manpages, use the --disable-asciidoc argument";
echo "when calling configure.";
echo;
echo "==================================";
exit 1;
fi
done
fi
if test "$fragile_hardening" = "yes"; then
AC_MSG_WARN([
============
Warning! Building Tor with --enable-fragile-hardening (also known as
--enable-expensive-hardening) makes some kinds of attacks harder, but makes
other kinds of attacks easier. A Tor instance build with this option will be
somewhat less vulnerable to remote code execution, arithmetic overflow, or
out-of-bounds read/writes... but at the cost of becoming more vulnerable to
denial of service attacks. For more information, see
https://trac.torproject.org/projects/tor/wiki/doc/TorFragileHardening
============
])
fi
AC_OUTPUT
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