597 lines
33 KiB
ReStructuredText
597 lines
33 KiB
ReStructuredText
=================
|
|
libtorrent manual
|
|
=================
|
|
|
|
.. include:: header.rst
|
|
|
|
.. contents:: Table of contents
|
|
:depth: 2
|
|
:backlinks: none
|
|
|
|
downloading and building
|
|
========================
|
|
|
|
To download the latest version of libtorrent, clone the `github repository`__.
|
|
|
|
__ https://github.com/arvidn/libtorrent
|
|
|
|
The build systems supported "out of the box" in libtorrent are boost-build v2
|
|
(BBv2) and cmake. If you still can't build after following these instructions,
|
|
you can usually get help in the ``#libtorrent`` IRC channel on
|
|
``irc.freenode.net``.
|
|
|
|
.. warning::
|
|
|
|
A common mistake when building and linking against libtorrent is
|
|
to build with one set of configuration options (#defines) and
|
|
link against it using a different set of configuration options. Since
|
|
libtorrent has some code in header files, that code will not be
|
|
compatible with the built library if they see different configurations.
|
|
|
|
Always make sure that the same TORRENT_* macros are defined when you
|
|
link against libtorrent as when you build it.
|
|
|
|
Boost-build supports propagating configuration options to dependencies.
|
|
When building using the makefiles, this is handled by setting the
|
|
configuration options in the pkg-config file. Always use pkg-config
|
|
when linking against libtorrent.
|
|
|
|
building from git
|
|
-----------------
|
|
|
|
To build libtorrent from git you need to clone the libtorrent repository from
|
|
github. If you downloaded a release `tarball`__, you can skip this section.
|
|
|
|
__ https://github.com/arvidn/libtorrent/releases/latest
|
|
|
|
::
|
|
|
|
git clone https://github.com/arvidn/libtorrent.git
|
|
|
|
|
|
building with BBv2
|
|
------------------
|
|
|
|
The primary reason to use boost-build is that it will automatically build the
|
|
dependent boost libraries with the correct compiler settings, in order to
|
|
ensure that the build targets are link compatible (see `boost guidelines`__
|
|
for some details on this issue).
|
|
|
|
__ https://boost.org/more/separate_compilation.html
|
|
|
|
Since BBv2 will build the boost libraries for you, you need the full boost
|
|
source package. Having boost installed via some package system is usually not
|
|
enough (and even if it is enough, the necessary environment variables are
|
|
usually not set by the package installer).
|
|
|
|
If you want to build against an installed copy of boost, you can skip directly
|
|
to step 3 (assuming you also have boost build installed).
|
|
|
|
|
|
Step 1: Download boost
|
|
~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
If you want to build against boost installed on your system, you can skip this
|
|
strep. Just make sure to have `BOOST_ROOT` unset for the `b2` invocation.
|
|
|
|
You'll find boost here__.
|
|
|
|
__ https://www.boost.org/users/download/#live
|
|
|
|
Extract the archive to some directory where you want it. For the sake of this
|
|
guide, let's assume you extract the package to ``c:\boost_1_68_0``. You'll
|
|
need at least version 1.56 of the boost library in order to build libtorrent.
|
|
|
|
|
|
Step 2: Setup BBv2
|
|
~~~~~~~~~~~~~~~~~~
|
|
|
|
If you have installed ``boost-build`` via a package manager, you can skip this
|
|
step. If not, you need to build boost build from the boost source package.
|
|
|
|
First you need to build ``b2``. You do this by opening a terminal (In windows,
|
|
run ``cmd``). Change directory to ``c:\boost_1_68_0\tools\build``. Then run the
|
|
script called ``bootstrap.bat`` or ``bootstrap.sh`` on a Unix system. This will
|
|
build ``b2`` and place it in a directory ``src/engine/bin.<architecture>``.
|
|
Copy the ``b2.exe`` (or ``b2`` on a Unix system) to a place that's in you
|
|
shell's ``PATH``. On Linux systems a place commonly used may be
|
|
``/usr/local/bin`` or on Windows ``c:\windows`` (you can also add directories to
|
|
the search paths by modifying the environment variable called ``PATH``).
|
|
|
|
Now you have ``b2`` installed. ``b2`` can be considered an interpreter
|
|
that the boost-build system is implemented on. So boost-build uses ``b2``.
|
|
So, to complete the installation you need to make two more things. You need to
|
|
set the environment variable ``BOOST_BUILD_PATH``. This is the path that tells
|
|
``b2`` where it can find boost-build, your configuration file and all the
|
|
toolsets (descriptions used by boost-build to know how to use different
|
|
compilers on different platforms). Assuming the boost install path above, set
|
|
it to ``c:\boost_1_68_0\tools\build``.
|
|
|
|
To set an environment variable in windows, type for example::
|
|
|
|
set BOOST_BUILD_PATH=c:\boost_1_68_0\tools\build\v2
|
|
|
|
In a terminal window.
|
|
|
|
The last thing to do is to configure which compiler(s) to use. Create a file
|
|
``user-config.jam`` in your home directory. Depending on your platform and which
|
|
compiler you're using, you should add a line for each compiler and compiler
|
|
version you have installed on your system that you want to be able to use with
|
|
BBv2. For example, if you're using Microsoft Visual Studio 12 (2013), just add a
|
|
line::
|
|
|
|
using msvc : 14.0 ;
|
|
|
|
If you use GCC, add the line::
|
|
|
|
using gcc ;
|
|
|
|
If you have more than one version of GCC installed, you can add the
|
|
command line used to invoke g++ after the version number, like this::
|
|
|
|
using gcc : 6.0 : g++-6 ;
|
|
using gcc : 7.0 : g++-7 ;
|
|
|
|
Another toolset worth mentioning is the ``darwin`` toolset (for macOS).
|
|
From Tiger (10.4) macOS comes with both GCC 3.3 and GCC 4.0. Then you can
|
|
use the following toolsets::
|
|
|
|
using darwin : 3.3 : g++-3.3 ;
|
|
using darwin : 4.0 : g++-4.0 ;
|
|
|
|
Note that the spaces around the semi-colons and colons are important!
|
|
|
|
Also see the `official installation instructions`_.
|
|
|
|
.. _`official installation instructions`: https://www.boost.org/doc/html/bbv2/installation.html
|
|
|
|
|
|
Step 3: Building libtorrent
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
When building libtorrent, boost is either picked up from system installed
|
|
locations or from a boost source package, if the ``BOOST_ROOT`` environment
|
|
variable is set pointing to one. If you're building boost from source, set
|
|
``BOOST_ROOT`` to your boost directory, e.g. ``c:\boost_1_68_0``.
|
|
|
|
Then the only thing left is simply to invoke ``b2``. If you want to specify
|
|
a specific toolset to use (compiler) you can just add that to the command line.
|
|
For example::
|
|
|
|
b2 msvc-14.0
|
|
b2 gcc-7.0
|
|
b2 darwin-4.0
|
|
|
|
.. note::
|
|
|
|
If the environment variable ``BOOST_ROOT`` is not set, the Jamfile will
|
|
attempt to link against "installed" boost libraries. i.e. assume the headers
|
|
and libraries are available in default search paths.
|
|
In this case it's critical that you build your project with the same version
|
|
of C++ and the same build flags as the system libraries were built with.
|
|
|
|
To build different versions you can also just add the name of the build
|
|
variant. Some default build variants in BBv2 are ``release``, ``debug``,
|
|
``profile``.
|
|
|
|
You can build libtorrent as a DLL too, by typing ``link=shared``, or
|
|
``link=static`` to build a static library.
|
|
|
|
If you want to explicitly say how to link against the runtime library, you
|
|
can set the ``runtime-link`` feature on the command line, either to ``shared``
|
|
or ``static``. Most operating systems will only allow linking shared against
|
|
the runtime, but on windows you can do both. Example::
|
|
|
|
b2 msvc-14.0 link=static runtime-link=static
|
|
|
|
.. note::
|
|
|
|
When building on windows, the path boost-build puts targets in may be too
|
|
long. If you get an error message like: "The input line is long", try to
|
|
pass --hash on the ``b2`` command line.
|
|
|
|
.. warning::
|
|
|
|
If you link statically to the runtime library, you cannot build libtorrent
|
|
as a shared library (DLL), since you will get separate heaps in the library
|
|
and in the client application. It will result in crashes and possibly link
|
|
errors.
|
|
|
|
.. note::
|
|
|
|
Some Linux systems requires linking against ``librt`` in order to access
|
|
the POSIX clock functions. If you get an error complaining about a missing
|
|
symbol ``clock_gettime``, you have to give ``need-librt=yes`` on the
|
|
b2 command line. This will make libtorrent link against ``librt``.
|
|
|
|
.. note::
|
|
|
|
When building on Solaris, you may have to specify ``stdlib=sun-stlport``
|
|
on the b2 command line.
|
|
|
|
The build targets are put in a directory called bin, and under it they are
|
|
sorted in directories depending on the toolset and build variant used.
|
|
|
|
To build the examples, just change directory to the examples directory and
|
|
invoke ``b2`` from there. To build and run the tests, go to the test
|
|
directory and run ``b2``.
|
|
|
|
Note that if you're building on windows using the ``msvc`` toolset, you cannot run it
|
|
from a cygwin terminal, you'll have to run it from a ``cmd`` terminal. The same goes for
|
|
cygwin, if you're building with gcc in cygwin you'll have to run it from a cygwin terminal.
|
|
Also, make sure the paths are correct in the different environments. In cygwin, the paths
|
|
(``BOOST_BUILD_PATH`` and ``BOOST_ROOT``) should be in the typical Unix-format (e.g.
|
|
``/cygdrive/c/boost_1_68_0``). In the windows environment, they should have the typical
|
|
windows format (``c:/boost_1_68_0``).
|
|
|
|
.. note::
|
|
In Jamfiles, spaces are separators. It's typically easiest to avoid spaces
|
|
in path names. If you want spaces in your paths, make sure to quote them
|
|
with double quotes (").
|
|
|
|
The ``Jamfile`` will define ``NDEBUG`` when it's building a release build.
|
|
For more build configuration flags see `Build configurations`_.
|
|
|
|
When enabling linking against openssl (by setting the ``crypto`` feature to
|
|
``openssl``) the Jamfile will look in some default directory for the openssl
|
|
headers and libraries. On macOS, it will look for the homebrew openssl package.
|
|
On Windows, it will look in ``C:\OpenSSL-Win32``, or ``C:\OpenSSL-Win64`` if
|
|
compiling in 64-bit.
|
|
|
|
To customize the library path and include path for openssl, set the features
|
|
``openssl-lib`` and ``openssl-include`` respectively.
|
|
|
|
Build features:
|
|
|
|
+--------------------------+----------------------------------------------------+
|
|
| boost build feature | values |
|
|
+==========================+====================================================+
|
|
| ``boost-link`` | * ``static`` - links statically against the boost |
|
|
| | libraries. |
|
|
| | * ``shared`` - links dynamically against the boost |
|
|
| | libraries. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``openssl-lib`` | can be used to specify the directory where libssl |
|
|
| | and libcrypto are installed (or the windows |
|
|
| | counterparts). |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``openssl-include`` | can be used to specify the include directory where |
|
|
| | the openssl headers are installed. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``logging`` | * ``off`` - logging alerts disabled. The |
|
|
| | reason to disable logging is to keep the binary |
|
|
| | size low where that matters. |
|
|
| | * ``on`` - default. logging alerts available, |
|
|
| | still need to be enabled by the alert mask. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``dht`` | * ``on`` - build with DHT support |
|
|
| | * ``off`` - build without DHT support. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``asserts`` | * ``auto`` - asserts are on if in debug mode |
|
|
| | * ``on`` - asserts are on, even in release mode |
|
|
| | * ``off`` - asserts are disabled |
|
|
| | * ``production`` - assertion failures are logged |
|
|
| | to ``asserts.log`` in the current working |
|
|
| | directory, but won't abort the process. |
|
|
| | The file they are logged to can be customized |
|
|
| | by setting the global pointer ``extern char |
|
|
| | const* libtorrent_assert_log`` to a different |
|
|
| | filename. |
|
|
| | * ``system`` use the libc assert macro |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``encryption`` | * ``on`` - encrypted bittorrent connections |
|
|
| | enabled. (Message Stream encryption). |
|
|
| | * ``off`` - turns off support for encrypted |
|
|
| | connections. The shipped public domain SHA-1 |
|
|
| | implementation is used. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``mutable-torrents`` | * ``on`` - mutable torrents are supported |
|
|
| | (`BEP 38`_) (default). |
|
|
| | * ``off`` - mutable torrents are not supported. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``crypto`` | * ``built-in`` - (default) uses built-in SHA-1 |
|
|
| | implementation. In macOS/iOS it uses |
|
|
| | CommonCrypto SHA-1 implementation. |
|
|
| | * ``openssl`` - links against openssl and |
|
|
| | libcrypto to use for SHA-1 hashing. |
|
|
| | This also enables HTTPS-tracker support and |
|
|
| | support for bittorrent over SSL. |
|
|
| | * ``libcrypto`` - links against libcrypto |
|
|
| | to use the SHA-1 implementation. |
|
|
| | * ``gcrypt`` - links against libgcrypt |
|
|
| | to use the SHA-1 implementation. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``openssl-version`` | This can be used on windows to link against the |
|
|
| | special OpenSSL library names used on windows |
|
|
| | prior to OpenSSL 1.1. |
|
|
| | |
|
|
| | * ``1.1`` - link against the normal openssl |
|
|
| | library name. (default) |
|
|
| | * ``pre1.1`` - link against the old windows names |
|
|
| | (i.e. ``ssleay32`` and ``libeay32``. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``link`` | * ``static`` - builds libtorrent as a static |
|
|
| | library (.a / .lib) |
|
|
| | * ``shared`` - builds libtorrent as a shared |
|
|
| | library (.so / .dll). |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``runtime-link`` | * ``static`` - links statically against the |
|
|
| | run-time library (if available on your |
|
|
| | platform). |
|
|
| | * ``shared`` - link dynamically against the |
|
|
| | run-time library (default). |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``variant`` | * ``debug`` - builds libtorrent with debug |
|
|
| | information and invariant checks. |
|
|
| | * ``release`` - builds libtorrent in release mode |
|
|
| | without invariant checks and with optimization. |
|
|
| | * ``profile`` - builds libtorrent with profile |
|
|
| | information. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``invariant-checks`` | This setting only affects debug builds (where |
|
|
| | ``NDEBUG`` is not defined). It defaults to ``on``. |
|
|
| | |
|
|
| | * ``on`` - internal invariant checks are enabled. |
|
|
| | * ``off`` - internal invariant checks are |
|
|
| | disabled. The resulting executable will run |
|
|
| | faster than a regular debug build. |
|
|
| | * ``full`` - turns on extra expensive invariant |
|
|
| | checks. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``debug-symbols`` | * ``on`` - default for debug builds. This setting |
|
|
| | is useful for building release builds with |
|
|
| | symbols. |
|
|
| | * ``off`` - default for release builds. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``deprecated-functions`` | * ``on`` - default. Includes deprecated functions |
|
|
| | of the API (might produce warnings during build |
|
|
| | when deprecated functions are used). |
|
|
| | * ``off`` - excludes deprecated functions from the |
|
|
| | API. Generates build errors when deprecated |
|
|
| | functions are used. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``iconv`` | * ``auto`` - use iconv for string conversions for |
|
|
| | Linux and MinGW and other posix platforms. |
|
|
| | * ``on`` - force use of iconv |
|
|
| | * ``off`` - force not using iconv (disables locale |
|
|
| | awareness except on windows). |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``i2p`` | * ``on`` - build with I2P support |
|
|
| | * ``off`` - build without I2P support |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``profile-calls`` | * ``off`` - default. No additional call profiling. |
|
|
| | * ``on`` - Enable logging of stack traces of |
|
|
| | calls into libtorrent that are blocking. On |
|
|
| | session shutdown, a file ``blocking_calls.txt`` |
|
|
| | is written with stack traces of blocking calls |
|
|
| | ordered by the number of them. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``utp-log`` | * ``off`` - default. Do not print verbose uTP |
|
|
| | log. |
|
|
| | * ``on`` - Print verbose uTP log, used to debug |
|
|
| | the uTP implementation. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``picker-debugging`` | * ``off`` - no extra invariant checks in piece |
|
|
| | picker. |
|
|
| | * ``on`` - include additional invariant checks in |
|
|
| | piece picker. Used for testing the piece picker. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``extensions`` | * ``on`` - enable extensions to the bittorrent |
|
|
| | protocol. |
|
|
| | * ``off`` - disable bittorrent extensions. |
|
|
+--------------------------+----------------------------------------------------+
|
|
| ``pic`` | * ``off`` - default. Build without specifying |
|
|
| | ``-fPIC``. |
|
|
| | * ``on`` - Force build with ``-fPIC`` (useful for |
|
|
| | building a static library to be linked into a |
|
|
| | shared library). |
|
|
+--------------------------+----------------------------------------------------+
|
|
|
|
The ``variant`` feature is *implicit*, which means you don't need to specify
|
|
the name of the feature, just the value.
|
|
|
|
When building the example client on windows, you need to build with
|
|
``link=static`` otherwise you may get unresolved external symbols for some
|
|
boost.program-options symbols.
|
|
|
|
For more information, see the `Boost build v2 documentation`__, or more
|
|
specifically `the section on built-in features`__.
|
|
|
|
__ https://boostorg.github.io/build/manual/develop/index.html
|
|
__ https://boostorg.github.io/build/manual/develop/index.html#bbv2.overview.builtins.features
|
|
|
|
|
|
Step 4: Installing libtorrent
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
To install libtorrent run ``b2`` with the ``install`` target::
|
|
|
|
b2 install --prefix=/usr/local
|
|
|
|
Change the value of the ``--prefix`` argument to install it in a different location.
|
|
|
|
building with cmake
|
|
-------------------
|
|
|
|
First of all, you need to install ``cmake``. Additionally you need a build
|
|
system to actually schedule builds, for example ``ninja``.
|
|
|
|
Step 1: Generating the build system
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
Create a build directory for out-of-source build inside the libtorrent root directory::
|
|
|
|
mkdir build
|
|
|
|
and ``cd`` there::
|
|
|
|
cd build
|
|
|
|
Run ``cmake`` in the build directory, like this::
|
|
|
|
cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_STANDARD=11 -G Ninja ..
|
|
|
|
The ``CMAKE_CXX_STANDARD`` has to be at least 11, but you may want to raise it
|
|
to ``14`` or ``17`` if your project use a newer version of the C++ standard.
|
|
|
|
.. warning::
|
|
|
|
The detection of boost sometimes fail in subtle ways. If you have the
|
|
``BOOST_ROOT`` environment variable set, it may find the pre-built system
|
|
libraries, but use the header files from your source package. To avoid this,
|
|
invoke ``cmake`` with ``BOOST_ROOT`` set to an empty string:
|
|
``BOOST_ROOT="" cmake ...``.
|
|
|
|
Other build options are:
|
|
|
|
+-----------------------+---------------------------------------------------+
|
|
| ``BUILD_SHARED_LIBS`` | Defaults ``ON``. Builds libtorrent as a shared |
|
|
| | library. |
|
|
+-----------------------+---------------------------------------------------+
|
|
| ``static_runtime`` | Defaults ``OFF``. Link libtorrent statically |
|
|
| | against the runtime libraries. |
|
|
+-----------------------+---------------------------------------------------+
|
|
| ``build_tests`` | Defaults ``OFF``. Also build the libtorrent |
|
|
| | tests. |
|
|
+-----------------------+---------------------------------------------------+
|
|
| ``build_examples`` | Defaults ``OFF``. Also build the examples in the |
|
|
| | examples directory. |
|
|
+-----------------------+---------------------------------------------------+
|
|
| ``build_tools`` | Defaults ``OFF``. Also build the tools in the |
|
|
| | tools directory. |
|
|
+-----------------------+---------------------------------------------------+
|
|
| ``python-bindings`` | Defaults ``OFF``. Also build the python bindings |
|
|
| | in bindings/python directory. |
|
|
+-----------------------+---------------------------------------------------+
|
|
| ``encryption`` | Defaults ``ON``. Support trackers and bittorrent |
|
|
| | over TLS, and obfuscated bittorrent connections. |
|
|
+-----------------------+---------------------------------------------------+
|
|
|
|
Options are set on the ``cmake`` command line with the ``-D`` option or later on using ``ccmake`` or ``cmake-gui`` applications. ``cmake`` run outputs a summary of all available options and and their current values.
|
|
|
|
Step 2: Building libtorrent
|
|
~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
In the terminal, run::
|
|
|
|
ninja -j8
|
|
|
|
in the build directory the number after ``-j`` specifies the number of parallel jobs to build in; you may omit this option to let ``ninja`` use all your cores).
|
|
|
|
If you enabled test in the configuration step, to run them, run::
|
|
|
|
ctest -j8
|
|
|
|
building with other build systems
|
|
---------------------------------
|
|
|
|
If you're building in MS Visual Studio, you may have to set the compiler
|
|
options "force conformance in for loop scope", "treat wchar_t as built-in
|
|
type" and "Enable Run-Time Type Info" to Yes.
|
|
|
|
build configurations
|
|
--------------------
|
|
|
|
By default libtorrent is built In debug mode, and will have pretty expensive
|
|
invariant checks and asserts built into it. If you want to disable such checks
|
|
(you want to do that in a release build) you can see the table below for which
|
|
defines you can use to control the build.
|
|
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| macro | description |
|
|
+========================================+=================================================+
|
|
| ``NDEBUG`` | If you define this macro, all asserts, |
|
|
| | invariant checks and general debug code will be |
|
|
| | removed. Since there is quite a lot of code in |
|
|
| | in header files in libtorrent, it may be |
|
|
| | important to define the symbol consistently |
|
|
| | across compilation units, including the clients |
|
|
| | files. Potential problems is different |
|
|
| | compilation units having different views of |
|
|
| | structs and class layouts and sizes. |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_DISABLE_LOGGING`` | This macro will disable support for logging |
|
|
| | alerts, like log_alert, torrent_log_alert and |
|
|
| | peer_log_alert. With this build flag, you |
|
|
| | cannot enable those alerts. |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_DISABLE_MUTABLE_TORRENTS`` | Disables mutable torrent support (`BEP 38`_) |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_LINKING_SHARED`` | If this is defined when including the |
|
|
| | libtorrent headers, the classes and functions |
|
|
| | will be tagged with ``__declspec(dllimport)`` |
|
|
| | on msvc and default visibility on GCC 4 and |
|
|
| | later. Set this in your project if you're |
|
|
| | linking against libtorrent as a shared library. |
|
|
| | (This is set by the Jamfile when |
|
|
| | ``link=shared`` is set). |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_BUILDING_SHARED`` | If this is defined, the functions and classes |
|
|
| | in libtorrent are marked with |
|
|
| | ``__declspec(dllexport)`` on msvc, or with |
|
|
| | default visibility on GCC 4 and later. This |
|
|
| | should be defined when building libtorrent as |
|
|
| | a shared library. (This is set by the Jamfile |
|
|
| | when ``link=shared`` is set). |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_DISABLE_DHT`` | If this is defined, the support for trackerless |
|
|
| | torrents will be disabled. |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_DISABLE_ENCRYPTION`` | This will disable any encryption support and |
|
|
| | the dependencies of a crypto library. |
|
|
| | Encryption support is the peer connection |
|
|
| | encrypted supported by clients such as |
|
|
| | uTorrent, Azureus and KTorrent. |
|
|
| | If this is not defined, either |
|
|
| | ``TORRENT_USE_LIBCRYPTO`` or |
|
|
| | ``TORRENT_USE_LIBGCRYPT`` must be defined. |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_DISABLE_EXTENSIONS`` | When defined, libtorrent plugin support is |
|
|
| | disabled along with support for the extension |
|
|
| | handshake (BEP 10). |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_USE_INVARIANT_CHECKS`` | If defined to non-zero, this will enable |
|
|
| | internal invariant checks in libtorrent. |
|
|
| | The invariant checks can sometimes |
|
|
| | be quite expensive, they typically don't scale |
|
|
| | very well. |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_EXPENSIVE_INVARIANT_CHECKS`` | This will enable extra expensive invariant |
|
|
| | checks. Useful for finding particular bugs |
|
|
| | or for running before releases. |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_NO_DEPRECATE`` | This will exclude all deprecated functions from |
|
|
| | the header files and source files. |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_PRODUCTION_ASSERTS`` | Define to either 0 or 1. Enables assert logging |
|
|
| | in release builds. |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_USE_ASSERTS`` | Define as 0 to disable asserts unconditionally. |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
| ``TORRENT_USE_SYSTEM_ASSERTS`` | Uses the libc assert macro rather then the |
|
|
| | custom one. |
|
|
+----------------------------------------+-------------------------------------------------+
|
|
|
|
.. _`BEP 38`: https://www.bittorrent.org/beps/bep_0038.html
|
|
|
|
If you experience that libtorrent uses unreasonable amounts of CPU, it will
|
|
definitely help to define ``NDEBUG``, since it will remove the invariant checks
|
|
within the library.
|
|
|
|
building openssl for windows
|
|
----------------------------
|
|
|
|
To build openssl for windows with Visual Studio 7.1 (2003) execute the following commands
|
|
in a command shell::
|
|
|
|
perl Configure VC-WIN32 --prefix="c:/openssl
|
|
call ms\do_nasm
|
|
call "C:\Program Files\Microsoft Visual Studio .NET 2003\vc7\bin\vcvars32.bat"
|
|
nmake -f ms\nt.mak
|
|
copy inc32\openssl "C:\Program Files\Microsoft Visual Studio .NET 2003\vc7\include\"
|
|
copy out32\libeay32.lib "C:\Program Files\Microsoft Visual Studio .NET 2003\vc7\lib"
|
|
copy out32\ssleay32.lib "C:\Program Files\Microsoft Visual Studio .NET 2003\vc7\lib"
|
|
|
|
This will also install the headers and library files in the visual studio directories to
|
|
be picked up by libtorrent.
|
|
|